3.2.0 Release

Fixes #274

.github/ISSUE_TEMPLATE.md

@@ -1,17 +0,0 @@
-##### What version of ViaBackwards are you using? Type /ver ViaBackwards:
-
-
-##### What version of ViaVersion are you using? Type /ver ViaVersion:
-
-
-##### What version of Spigot are you using? Type /ver:
-
-
-##### What plugins are you using? Type /plugins:
-
-
-##### How/when does this error happen? login?:
-
-
-##### Is there an error in the console? Use pastebin.com. Is there a kick message?:
-

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,31 @@
+---
+name: Bug report
+about: Create a bug report so we can fix it
+
+---
+
+**Describe the bug, provide any errors**
+A clear and concise description of what the bug is. Can you https://paste.gg/ the error?
+
+**How can we reproduce it?**
+Steps to reproduce the behavior:
+1. Login on 1.12'
+2. Click on '....'
+3. The '....' is displayed wrong
+
+**Expected behaviour**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**ViaVersion Dump:**
+- Type /viaversion dump, and put the link here.
+
+**Additional server info**
+Do you use a proxy (eg. BungeeCord)? What software do you use and what plugins?
+
+**Checklist**
+- [ ] I have included a ViaVersion dump
+- [ ] If applicable, I have included a paste (not a screenshot) of the error
+- [ ] I have tried a build from https://ci.viaversion.com/ and the issue still persists

.gitignore

@@ -1,6 +1,7 @@
 # Created by .ignore support plugin (hsz.mobi)
 ### Maven template
 target/
+*/target
 pom.xml.tag
 pom.xml.releaseBackup
 pom.xml.versionsBackup
@@ -78,6 +79,8 @@ local.properties
 .idea/tasks.xml
 .idea/dictionaries
 .idea/vcs.xml
+.idea/
+*.iml
 .idea/jsLibraryMappings.xml
 
 # Sensitive or high-churn files:

LICENSE

@@ -1,674 +1,21 @@
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-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-  14. Revised Versions of this License.
-
-  The Free Software Foundation may publish revised and/or new versions of
-the GNU General Public License from time to time.  Such new versions will
-be similar in spirit to the present version, but may differ in detail to
-address new problems or concerns.
-
-  Each version is given a distinguishing version number.  If the
-Program specifies that a certain numbered version of the GNU General
-Public License "or any later version" applies to it, you have the
-option of following the terms and conditions either of that numbered
-version or of any later version published by the Free Software
-Foundation.  If the Program does not specify a version number of the
-GNU General Public License, you may choose any version ever published
-by the Free Software Foundation.
-
-  If the Program specifies that a proxy can decide which future
-versions of the GNU General Public License can be used, that proxy's
-public statement of acceptance of a version permanently authorizes you
-to choose that version for the Program.
-
-  Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-  15. Disclaimer of Warranty.
-
-  THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY
-OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT LIMITED TO,
-THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
-PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND PERFORMANCE OF THE PROGRAM
-IS WITH YOU.  SHOULD THE PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF
-ALL NECESSARY SERVICING, REPAIR OR CORRECTION.
-
-  16. Limitation of Liability.
-
-  IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR CONVEYS
-THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES, INCLUDING ANY
-GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE
-USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED TO LOSS OF
-DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY YOU OR THIRD
-PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER PROGRAMS),
-EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF
-SUCH DAMAGES.
-
-  17. Interpretation of Sections 15 and 16.
-
-  If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-                     END OF TERMS AND CONDITIONS
-
-            How to Apply These Terms to Your New Programs
-
-  If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these terms.
-
-  To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the "copyright" line and a pointer to where the full notice is found.
-
-    {one line to give the program's name and a brief idea of what it does.}
-    Copyright (C) {year}  {name of author}
-
-    This program is free software: you can redistribute it and/or modify
-    it under the terms of the GNU General Public License as published by
-    the Free Software Foundation, either version 3 of the License, or
-    (at your option) any later version.
-
-    This program is distributed in the hope that it will be useful,
-    but WITHOUT ANY WARRANTY; without even the implied warranty of
-    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-    GNU General Public License for more details.
-
-    You should have received a copy of the GNU General Public License
-    along with this program.  If not, see <http://www.gnu.org/licenses/>.
-
-Also add information on how to contact you by electronic and paper mail.
-
-  If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-    {project}  Copyright (C) {year}  {fullname}
-    This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
-    This is free software, and you are welcome to redistribute it
-    under certain conditions; type `show c' for details.
-
-The hypothetical commands `show w' and `show c' should show the appropriate
-parts of the General Public License.  Of course, your program's commands
-might be different; for a GUI interface, you would use an "about box".
-
-  You should also get your employer (if you work as a programmer) or school,
-if any, to sign a "copyright disclaimer" for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-<http://www.gnu.org/licenses/>.
-
-  The GNU General Public License does not permit incorporating your program
-into proprietary programs.  If your program is a subroutine library, you
-may consider it more useful to permit linking proprietary applications with
-the library.  If this is what you want to do, use the GNU Lesser General
-Public License instead of this License.  But first, please read
-<http://www.gnu.org/philosophy/why-not-lgpl.html>.
+MIT License
+
+Copyright (c) 2016-2020
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

@@ -1,13 +1,27 @@
 # ViaBackwards
 
-Allows 1.9.x on a 1.10 Spigot server.
-Requires [ViaVersion](http://viaversion.com) to be installed
+Allows older Minecraft versions on a newer Minecraft server
 
-TODO:
-- [ ] Cleanup code
-- [ ] Improve the rewriters
-- [ ] Make it possible to send metadata with the rewriteEntityId
-- [ ] Add support for sound names
-- [ ] Create JavaDocs
-- [ ] Improve the Entity tracker system to work good with multiple versions.
-- [ ] Make it possible to choose your own replacement blocks
+Supported versions
+-
+**Green** = ViaVersion\
+**Purple** = ViaBackwards addition
+
+![supported_versions](https://i.imgur.com/HBihr0t.png)
+
+Releases / Dev Builds
+-
+**Requires [ViaVersion](https://www.spigotmc.org/resources/viaversion.19254/) to be installed**
+   
+You can find the latest dev builds here:\
+**Jenkins:** https://ci.viaversion.com/view/ViaBackwards/
+
+**Spigot page:** https://www.spigotmc.org/resources/viabackwards.27448/
+
+---
+
+**Maven:** https://repo.viaversion.com/
+
+**Issue tracker:** https://github.com/ViaVersion/ViaBackwards/issues
+
+**List of contributors:** https://github.com/ViaVersion/ViaBackwards/graphs/contributors

all/pom.xml

@@ -0,0 +1,151 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright (c) 2016 Matsv
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>viabackwards-parent</artifactId>
+        <groupId>nl.matsv</groupId>
+        <version>3.2.0</version>
+    </parent>
+
+    <artifactId>viabackwards-all</artifactId>
+    <name>ViaBackwards</name>
+
+    <build>
+        <finalName>${project.name}-${project.version}</finalName>
+        <defaultGoal>clean install</defaultGoal>
+
+        <plugins>
+            <!-- Write git commit hash into build properties -->
+            <plugin>
+                <groupId>net.md-5</groupId>
+                <artifactId>scriptus</artifactId>
+                <version>0.3.2</version>
+                <configuration>
+                    <format>git-ViaBackwards-${project.parent.version}:%s</format>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>initialize</phase>
+                        <goals>
+                            <goal>describe</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-jar-plugin</artifactId>
+                <version>3.2.0</version>
+                <configuration>
+                    <archive>
+                        <manifestEntries>
+                            <!--suppress MavenModelInspection -->
+                            <Implementation-Version>${describe}</Implementation-Version>
+                        </manifestEntries>
+                    </archive>
+                </configuration>
+            </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>1.8</source>
+                    <target>1.8</target>
+                    <showWarnings>false</showWarnings>
+                    <showDeprecation>false</showDeprecation>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.2</version>
+                <configuration>
+                    <createDependencyReducedPom>false</createDependencyReducedPom>
+                    <minimizeJar>false</minimizeJar>
+                    <relocations>
+                        <relocation>
+                            <pattern>com.google.gson</pattern>
+                            <shadedPattern>us.myles.viaversion.libs.gson</shadedPattern>
+                        </relocation>
+                        <relocation>
+                            <pattern>net.md_5.bungee</pattern>
+                            <shadedPattern>us.myles.viaversion.libs.bungeecordchat</shadedPattern>
+                            <includes>
+                                <include>net.md_5.bungee.api.chat.**</include>
+                                <include>net.md_5.bungee.api.ChatColor</include>
+                                <include>net.md_5.bungee.api.ChatMessageType</include>
+                                <include>net.md_5.bungee.chat.**</include>
+                            </includes>
+                        </relocation>
+                    </relocations>
+                </configuration>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+    </build>
+
+    <dependencies>
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-core</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-bukkit</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-bungee</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-fabric</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-sponge</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-velocity</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+</project>

bukkit/pom.xml

@@ -0,0 +1,58 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright (c) 2016 Matsv
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>viabackwards-parent</artifactId>
+        <groupId>nl.matsv</groupId>
+        <version>3.2.0</version>
+    </parent>
+
+    <artifactId>viabackwards-bukkit</artifactId>
+
+    <repositories>
+        <repository>
+            <id>spigot-repo</id>
+            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.16.1-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-core</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <resources>
+            <resource>
+                <targetPath>.</targetPath>
+                <filtering>true</filtering>
+                <directory>src/main/resources/</directory>
+                <includes>
+                    <include>*</include>
+                </includes>
+            </resource>
+        </resources>
+    </build>
+</project>

bukkit/src/main/java/nl/matsv/viabackwards/BukkitPlugin.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards;
+
+import nl.matsv.viabackwards.api.ViaBackwardsPlatform;
+import nl.matsv.viabackwards.listener.FireExtinguishListener;
+import nl.matsv.viabackwards.listener.LecternInteractListener;
+import org.bukkit.plugin.java.JavaPlugin;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.bukkit.platform.BukkitViaLoader;
+
+public class BukkitPlugin extends JavaPlugin implements ViaBackwardsPlatform {
+
+    @Override
+    public void onEnable() {
+        init(getDataFolder());
+        Via.getPlatform().runSync(this::onServerLoaded);
+    }
+
+    private void onServerLoaded() {
+        BukkitViaLoader loader = (BukkitViaLoader) Via.getManager().getLoader();
+        if (ProtocolRegistry.SERVER_PROTOCOL >= ProtocolVersion.v1_16.getVersion()) {
+            loader.storeListener(new FireExtinguishListener(this)).register();
+        }
+        if (ProtocolRegistry.SERVER_PROTOCOL >= ProtocolVersion.v1_14.getVersion()) {
+            loader.storeListener(new LecternInteractListener(this)).register();
+        }
+    }
+
+    @Override
+    public void disable() {
+        getPluginLoader().disablePlugin(this);
+    }
+}

bukkit/src/main/java/nl/matsv/viabackwards/listener/FireExtinguishListener.java

@@ -0,0 +1,36 @@
+package nl.matsv.viabackwards.listener;
+
+import nl.matsv.viabackwards.BukkitPlugin;
+import nl.matsv.viabackwards.protocol.protocol1_15_2to1_16.Protocol1_15_2To1_16;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.block.Action;
+import org.bukkit.event.player.PlayerInteractEvent;
+import us.myles.ViaVersion.bukkit.listeners.ViaBukkitListener;
+
+public class FireExtinguishListener extends ViaBukkitListener {
+
+    public FireExtinguishListener(BukkitPlugin plugin) {
+        super(plugin, Protocol1_15_2To1_16.class);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onFireExtinguish(PlayerInteractEvent event) {
+        if (event.getAction() != Action.LEFT_CLICK_BLOCK) return;
+
+        Block block = event.getClickedBlock();
+        if (block == null) return;
+
+        Player player = event.getPlayer();
+        if (!isOnPipe(player)) return;
+
+        Block relative = block.getRelative(event.getBlockFace());
+        if (relative.getType() == Material.FIRE) {
+            event.setCancelled(true);
+            relative.setType(Material.AIR);
+        }
+    }
+}

bukkit/src/main/java/nl/matsv/viabackwards/listener/LecternInteractListener.java

@@ -0,0 +1,47 @@
+package nl.matsv.viabackwards.listener;
+
+import nl.matsv.viabackwards.BukkitPlugin;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.Protocol1_13_2To1_14;
+import org.bukkit.Material;
+import org.bukkit.block.Block;
+import org.bukkit.block.Lectern;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.player.PlayerInteractEvent;
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.BookMeta;
+import us.myles.ViaVersion.bukkit.listeners.ViaBukkitListener;
+
+public class LecternInteractListener extends ViaBukkitListener {
+
+    public LecternInteractListener(BukkitPlugin plugin) {
+        super(plugin, Protocol1_13_2To1_14.class);
+    }
+
+    @EventHandler(priority = EventPriority.HIGHEST, ignoreCancelled = true)
+    public void onLecternInteract(PlayerInteractEvent event) {
+        Block block = event.getClickedBlock();
+        if (block == null || block.getType() != Material.LECTERN) return;
+
+        Player player = event.getPlayer();
+        if (!isOnPipe(player)) return;
+
+        Lectern lectern = (Lectern) block.getState();
+        ItemStack book = lectern.getInventory().getItem(0);
+        if (book == null) return;
+
+        BookMeta meta = (BookMeta) book.getItemMeta();
+
+        // Open a book with the text of the lectern's writable book
+        ItemStack newBook = new ItemStack(Material.WRITTEN_BOOK);
+        BookMeta newBookMeta = (BookMeta) newBook.getItemMeta();
+        newBookMeta.setPages(meta.getPages());
+        newBookMeta.setAuthor("an upsidedown person");
+        newBookMeta.setTitle("buk");
+        newBook.setItemMeta(newBookMeta);
+        player.openBook(newBook);
+
+        event.setCancelled(true);
+    }
+}

bukkit/src/main/resources/plugin.yml

@@ -0,0 +1,11 @@
+name: ViaBackwards
+version: ${project.version}
+description: Allow older Minecraft versions to connect to a newer server version.
+main: nl.matsv.viabackwards.BukkitPlugin
+api-version: 1.13
+
+authors: [Matsv, KennyTV, Gerrygames, creeper123123321, ForceUpdate1]
+website: ${project.url}
+
+load: STARTUP
+depend: [ViaVersion]

bungee/pom.xml

@@ -0,0 +1,62 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright (c) 2016 Matsv
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>viabackwards-parent</artifactId>
+        <groupId>nl.matsv</groupId>
+        <version>3.2.0</version>
+    </parent>
+
+    <artifactId>viabackwards-bungee</artifactId>
+
+    <repositories>
+        <!-- Bungee repo -->
+        <repository>
+            <id>bungeecord-repo</id>
+            <url>https://oss.sonatype.org/content/repositories/snapshots</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <!-- BungeeCord API -->
+        <dependency>
+            <groupId>net.md-5</groupId>
+            <artifactId>bungeecord-api</artifactId>
+            <version>1.15-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+
+        <!-- Core Module -->
+        <dependency>
+            <groupId>nl.matsv</groupId>
+            <artifactId>viabackwards-core</artifactId>
+            <version>${project.parent.version}</version>
+            <scope>compile</scope>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <resources>
+            <resource>
+                <targetPath>.</targetPath>
+                <filtering>true</filtering>
+                <directory>src/main/resources/</directory>
+                <includes>
+                    <include>*</include>
+                </includes>
+            </resource>
+        </resources>
+    </build>
+</project>

bungee/src/main/java/nl/matsv/viabackwards/BungeePlugin.java

@@ -0,0 +1,27 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards;
+
+import net.md_5.bungee.api.plugin.Plugin;
+import nl.matsv.viabackwards.api.ViaBackwardsPlatform;
+import us.myles.ViaVersion.api.Via;
+
+public class BungeePlugin extends Plugin implements ViaBackwardsPlatform {
+
+    @Override
+    public void onLoad() {
+        Via.getManager().addEnableListener(() -> this.init(getDataFolder()));
+    }
+
+    @Override
+    public void disable() {
+    }
+}

bungee/src/main/resources/bungee.yml

@@ -0,0 +1,5 @@
+name: ViaBackwards
+main: nl.matsv.viabackwards.BungeePlugin
+author: "Matsv, KennyTV, Gerrygames, creeper123123321, ForceUpdate1"
+version: ${project.version}
+depends: [ViaVersion]

core/pom.xml

@@ -0,0 +1,34 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+  ~ Copyright (c) 2016 Matsv
+  ~
+  ~ Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+  ~
+  ~ The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+  ~
+  ~ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+  -->
+
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+    <parent>
+        <artifactId>viabackwards-parent</artifactId>
+        <groupId>nl.matsv</groupId>
+        <version>3.2.0</version>
+    </parent>
+
+    <artifactId>viabackwards-core</artifactId>
+
+    <dependencies>
+        <!-- Netty (Network Library) -->
+        <dependency>
+            <groupId>io.netty</groupId>
+            <artifactId>netty-all</artifactId>
+            <version>4.0.20.Final</version>
+            <scope>provided</scope>
+            <optional>true</optional>
+        </dependency>
+    </dependencies>
+</project>

core/src/main/java/nl/matsv/viabackwards/ViaBackwards.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards;
+
+import com.google.common.base.Preconditions;
+import nl.matsv.viabackwards.api.ViaBackwardsConfig;
+import nl.matsv.viabackwards.api.ViaBackwardsPlatform;
+
+public class ViaBackwards {
+
+    private static ViaBackwardsPlatform platform;
+    private static ViaBackwardsConfig config;
+
+    public static void init(ViaBackwardsPlatform platform, ViaBackwardsConfig config) {
+        Preconditions.checkArgument(platform != null, "ViaBackwards is already initialized");
+
+        ViaBackwards.platform = platform;
+        ViaBackwards.config = config;
+    }
+
+    public static ViaBackwardsPlatform getPlatform() {
+        return platform;
+    }
+
+    public static ViaBackwardsConfig getConfig() {
+        return config;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/ViaBackwardsConfig.java

@@ -0,0 +1,68 @@
+package nl.matsv.viabackwards;
+
+import us.myles.ViaVersion.util.Config;
+
+import java.io.File;
+import java.net.URL;
+import java.util.Collections;
+import java.util.List;
+import java.util.Map;
+
+public class ViaBackwardsConfig extends Config implements nl.matsv.viabackwards.api.ViaBackwardsConfig {
+
+    private boolean addCustomEnchantsToLore;
+    private boolean addTeamColorToPrefix;
+    private boolean fix1_13FacePlayer;
+    private boolean alwaysShowOriginalMobName;
+
+    public ViaBackwardsConfig(File configFile) {
+        super(configFile);
+    }
+
+    @Override
+    public void reloadConfig() {
+        super.reloadConfig();
+        loadFields();
+    }
+
+    private void loadFields() {
+        addCustomEnchantsToLore = getBoolean("add-custom-enchants-into-lore", true);
+        addTeamColorToPrefix = getBoolean("add-teamcolor-to-prefix", true);
+        fix1_13FacePlayer = getBoolean("fix-1_13-face-player", false);
+        alwaysShowOriginalMobName = getBoolean("always-show-original-mob-name", true);
+    }
+
+    @Override
+    public boolean addCustomEnchantsToLore() {
+        return addCustomEnchantsToLore;
+    }
+
+    @Override
+    public boolean addTeamColorTo1_13Prefix() {
+        return addTeamColorToPrefix;
+    }
+
+    @Override
+    public boolean isFix1_13FacePlayer() {
+        return fix1_13FacePlayer;
+    }
+
+    @Override
+    public boolean alwaysShowOriginalMobName() {
+        return alwaysShowOriginalMobName;
+    }
+
+    @Override
+    public URL getDefaultConfigURL() {
+        return getClass().getClassLoader().getResource("assets/viabackwards/config.yml");
+    }
+
+    @Override
+    protected void handleConfig(Map<String, Object> map) {
+    }
+
+    @Override
+    public List<String> getUnsupportedOptions() {
+        return Collections.emptyList();
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/BackwardsProtocol.java

@@ -0,0 +1,38 @@
+package nl.matsv.viabackwards.api;
+
+import nl.matsv.viabackwards.api.data.BackwardsMappings;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.ViaVersion.api.protocol.ServerboundPacketType;
+
+public abstract class BackwardsProtocol<C1 extends ClientboundPacketType, C2 extends ClientboundPacketType, S1 extends ServerboundPacketType, S2 extends ServerboundPacketType>
+        extends Protocol<C1, C2, S1, S2> {
+
+    protected BackwardsProtocol() {
+    }
+
+    protected BackwardsProtocol(@Nullable Class<C1> oldClientboundPacketEnum, @Nullable Class<C2> clientboundPacketEnum,
+                                @Nullable Class<S1> oldServerboundPacketEnum, @Nullable Class<S2> serverboundPacketEnum) {
+        super(oldClientboundPacketEnum, clientboundPacketEnum, oldServerboundPacketEnum, serverboundPacketEnum);
+    }
+
+    /**
+     * Waits for the given protocol to be loaded to then asynchronously execute the runnable for this protocol.
+     */
+    protected void executeAsyncAfterLoaded(Class<? extends Protocol> protocolClass, Runnable runnable) {
+        ProtocolRegistry.addMappingLoaderFuture(getClass(), protocolClass, runnable);
+    }
+
+    @Override
+    public boolean hasMappingDataToLoad() {
+        // Manually load them later, since they depend on VV's mappings
+        return false;
+    }
+
+    @Override
+    public BackwardsMappings getMappingData() {
+        return null;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/ViaBackwardsConfig.java

@@ -0,0 +1,32 @@
+package nl.matsv.viabackwards.api;
+
+public interface ViaBackwardsConfig {
+
+    /**
+     * Mimics name and level of a custom enchant through the item's lore.
+     *
+     * @return true if enabled
+     */
+    boolean addCustomEnchantsToLore();
+
+    /**
+     * Writes the color of the scoreboard team after the prefix.
+     *
+     * @return true if enabled
+     */
+    boolean addTeamColorTo1_13Prefix();
+
+    /**
+     * Converts the new 1.13 face player packets to look packets.
+     *
+     * @return true if enabled
+     */
+    boolean isFix1_13FacePlayer();
+
+    /**
+     * Always shows the original mob's name instead of only when hovering over them with the cursor.
+     *
+     * @return true if enabled
+     */
+    boolean alwaysShowOriginalMobName();
+}

core/src/main/java/nl/matsv/viabackwards/api/ViaBackwardsPlatform.java

@@ -0,0 +1,134 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.ViaBackwardsConfig;
+import nl.matsv.viabackwards.api.rewriters.TranslatableRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.Protocol1_10To1_11;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.Protocol1_11_1To1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.Protocol1_11To1_11_1;
+import nl.matsv.viabackwards.protocol.protocol1_12_1to1_12_2.Protocol1_12_1To1_12_2;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.Protocol1_12_2To1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12to1_12_1.Protocol1_12To1_12_1;
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.Protocol1_13_1To1_13_2;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.Protocol1_13_2To1_14;
+import nl.matsv.viabackwards.protocol.protocol1_13to1_13_1.Protocol1_13To1_13_1;
+import nl.matsv.viabackwards.protocol.protocol1_14_1to1_14_2.Protocol1_14_1To1_14_2;
+import nl.matsv.viabackwards.protocol.protocol1_14_2to1_14_3.Protocol1_14_2To1_14_3;
+import nl.matsv.viabackwards.protocol.protocol1_14_3to1_14_4.Protocol1_14_3To1_14_4;
+import nl.matsv.viabackwards.protocol.protocol1_14_4to1_15.Protocol1_14_4To1_15;
+import nl.matsv.viabackwards.protocol.protocol1_14to1_14_1.Protocol1_14To1_14_1;
+import nl.matsv.viabackwards.protocol.protocol1_15_1to1_15_2.Protocol1_15_1To1_15_2;
+import nl.matsv.viabackwards.protocol.protocol1_15_2to1_16.Protocol1_15_2To1_16;
+import nl.matsv.viabackwards.protocol.protocol1_15to1_15_1.Protocol1_15To1_15_1;
+import nl.matsv.viabackwards.protocol.protocol1_16_2to1_16_3.Protocol1_16_2To1_16_3;
+import nl.matsv.viabackwards.protocol.protocol1_16_3to1_16_4.Protocol1_16_3To1_16_4;
+import nl.matsv.viabackwards.protocol.protocol1_16to1_16_1.Protocol1_16To1_16_1;
+import nl.matsv.viabackwards.protocol.protocol1_16_1to1_16_2.Protocol1_16_1To1_16_2;
+import nl.matsv.viabackwards.protocol.protocol1_9_4to1_10.Protocol1_9_4To1_10;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.protocol.ProtocolVersion;
+import us.myles.ViaVersion.update.Version;
+
+import java.io.File;
+import java.util.logging.Logger;
+
+import static us.myles.ViaVersion.api.protocol.ProtocolRegistry.registerProtocol;
+
+public interface ViaBackwardsPlatform {
+
+    String MINIMUM_VV_VERSION = "3.2.0";
+
+    /**
+     * Initialize ViaBackwards.
+     */
+    default void init(File dataFolder) {
+        ViaBackwardsConfig config = new ViaBackwardsConfig(new File(dataFolder, "config.yml"));
+        config.reloadConfig();
+
+        ViaBackwards.init(this, config);
+
+        if (isOutdated()) return;
+
+        String version = ViaBackwards.class.getPackage().getImplementationVersion();
+        Via.getManager().getSubPlatforms().add(version != null ? version : "UNKNOWN");
+
+        getLogger().info("Loading translations...");
+        TranslatableRewriter.loadTranslatables();
+
+        getLogger().info("Registering protocols...");
+        registerProtocol(new Protocol1_9_4To1_10(), ProtocolVersion.v1_9_3, ProtocolVersion.v1_10);
+
+        registerProtocol(new Protocol1_10To1_11(), ProtocolVersion.v1_10, ProtocolVersion.v1_11);
+        registerProtocol(new Protocol1_11To1_11_1(), ProtocolVersion.v1_11, ProtocolVersion.v1_11_1);
+
+        registerProtocol(new Protocol1_11_1To1_12(), ProtocolVersion.v1_11_1, ProtocolVersion.v1_12);
+        registerProtocol(new Protocol1_12To1_12_1(), ProtocolVersion.v1_12, ProtocolVersion.v1_12_1);
+        registerProtocol(new Protocol1_12_1To1_12_2(), ProtocolVersion.v1_12_1, ProtocolVersion.v1_12_2);
+
+        registerProtocol(new Protocol1_12_2To1_13(), ProtocolVersion.v1_12_2, ProtocolVersion.v1_13);
+        registerProtocol(new Protocol1_13To1_13_1(), ProtocolVersion.v1_13, ProtocolVersion.v1_13_1);
+        registerProtocol(new Protocol1_13_1To1_13_2(), ProtocolVersion.v1_13_1, ProtocolVersion.v1_13_2);
+
+        registerProtocol(new Protocol1_13_2To1_14(), ProtocolVersion.v1_13_2, ProtocolVersion.v1_14);
+        registerProtocol(new Protocol1_14To1_14_1(), ProtocolVersion.v1_14, ProtocolVersion.v1_14_1);
+        registerProtocol(new Protocol1_14_1To1_14_2(), ProtocolVersion.v1_14_1, ProtocolVersion.v1_14_2);
+        registerProtocol(new Protocol1_14_2To1_14_3(), ProtocolVersion.v1_14_2, ProtocolVersion.v1_14_3);
+        registerProtocol(new Protocol1_14_3To1_14_4(), ProtocolVersion.v1_14_3, ProtocolVersion.v1_14_4);
+
+        registerProtocol(new Protocol1_14_4To1_15(), ProtocolVersion.v1_14_4, ProtocolVersion.v1_15);
+        registerProtocol(new Protocol1_15To1_15_1(), ProtocolVersion.v1_15, ProtocolVersion.v1_15_1);
+        registerProtocol(new Protocol1_15_1To1_15_2(), ProtocolVersion.v1_15_1, ProtocolVersion.v1_15_2);
+
+        registerProtocol(new Protocol1_15_2To1_16(), ProtocolVersion.v1_15_2, ProtocolVersion.v1_16);
+        registerProtocol(new Protocol1_16To1_16_1(), ProtocolVersion.v1_16, ProtocolVersion.v1_16_1);
+        registerProtocol(new Protocol1_16_1To1_16_2(), ProtocolVersion.v1_16_1, ProtocolVersion.v1_16_2);
+        registerProtocol(new Protocol1_16_2To1_16_3(), ProtocolVersion.v1_16_2, ProtocolVersion.v1_16_3);
+        registerProtocol(new Protocol1_16_3To1_16_4(), ProtocolVersion.v1_16_3, ProtocolVersion.v1_16_4);
+    }
+
+    /**
+     * Logger provided by the platform.
+     *
+     * @return logger instance
+     */
+    Logger getLogger();
+
+    default boolean isOutdated() {
+        String vvVersion = Via.getPlatform().getPluginVersion();
+        if (vvVersion != null && new Version(vvVersion).compareTo(new Version(MINIMUM_VV_VERSION + "--")) < 0) {
+            getLogger().severe("================================");
+            getLogger().severe("YOUR VIAVERSION IS OUTDATED");
+            getLogger().severe("PLEASE USE VIAVERSION " + MINIMUM_VV_VERSION + " OR NEWER");
+            getLogger().severe("LINK: https://ci.viaversion.com/");
+            getLogger().severe("VIABACKWARDS WILL NOW DISABLE");
+            getLogger().severe("================================");
+
+            disable();
+            return true;
+        }
+
+        return false;
+    }
+
+    /**
+     * Disable the plugin.
+     */
+    void disable();
+
+    /**
+     * Returns ViaBackwards's data folder.
+     *
+     * @return data folder
+     */
+    File getDataFolder();
+}

core/src/main/java/nl/matsv/viabackwards/api/data/BackwardsMappings.java

@@ -0,0 +1,128 @@
+package nl.matsv.viabackwards.api.data;
+
+import com.google.common.base.Preconditions;
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.data.MappingData;
+import us.myles.ViaVersion.api.data.Mappings;
+import us.myles.ViaVersion.api.protocol.Protocol;
+import us.myles.ViaVersion.api.protocol.ProtocolRegistry;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.gson.JsonObject;
+
+import java.util.Map;
+
+public class BackwardsMappings extends MappingData {
+
+    private final Class<? extends Protocol> vvProtocolClass;
+    private Int2ObjectMap<MappedItem> backwardsItemMappings;
+    private Map<String, String> backwardsSoundMappings;
+
+    public BackwardsMappings(String oldVersion, String newVersion, @Nullable Class<? extends Protocol> vvProtocolClass) {
+        this(oldVersion, newVersion, vvProtocolClass, false);
+    }
+
+    public BackwardsMappings(String oldVersion, String newVersion, @Nullable Class<? extends Protocol> vvProtocolClass, boolean hasDiffFile) {
+        super(oldVersion, newVersion, hasDiffFile);
+        Preconditions.checkArgument(!vvProtocolClass.isAssignableFrom(BackwardsProtocol.class));
+        this.vvProtocolClass = vvProtocolClass;
+        // Just re-use ViaVersion's item id map
+        loadItems = false;
+    }
+
+    @Override
+    protected void loadExtras(JsonObject oldMappings, JsonObject newMappings, @Nullable JsonObject diffMappings) {
+        if (diffMappings != null) {
+            JsonObject diffItems = diffMappings.getAsJsonObject("items");
+            if (diffItems != null) {
+                backwardsItemMappings = VBMappingDataLoader.loadItemMappings(oldMappings.getAsJsonObject("items"), newMappings.getAsJsonObject("items"), diffItems);
+            }
+
+            JsonObject diffSounds = diffMappings.getAsJsonObject("sounds");
+            if (diffSounds != null) {
+                backwardsSoundMappings = VBMappingDataLoader.objectToMap(diffSounds);
+            }
+        }
+
+        // Just re-use ViaVersion's item id map
+        if (vvProtocolClass != null) {
+            itemMappings = ProtocolRegistry.getProtocol(vvProtocolClass).getMappingData().getItemMappings().inverse();
+        }
+
+        loadVBExtras(oldMappings, newMappings);
+    }
+
+    @Override
+    @Nullable
+    protected Mappings loadFromArray(JsonObject oldMappings, JsonObject newMappings, @Nullable JsonObject diffMappings, String key) {
+        if (!oldMappings.has(key) || !newMappings.has(key)) return null;
+
+        JsonObject diff = diffMappings != null ? diffMappings.getAsJsonObject(key) : null;
+        return new VBMappings(oldMappings.getAsJsonArray(key), newMappings.getAsJsonArray(key), diff, shouldWarnOnMissing(key));
+    }
+
+    @Override
+    @Nullable
+    protected Mappings loadFromObject(JsonObject oldMappings, JsonObject newMappings, @Nullable JsonObject diffMappings, String key) {
+        if (!oldMappings.has(key) || !newMappings.has(key)) return null;
+
+        JsonObject diff = diffMappings != null ? diffMappings.getAsJsonObject(key) : null;
+        return new VBMappings(oldMappings.getAsJsonObject(key), newMappings.getAsJsonObject(key), diff, shouldWarnOnMissing(key));
+    }
+
+    @Override
+    protected JsonObject loadDiffFile() {
+        return VBMappingDataLoader.loadFromDataDir("mapping-" + newVersion + "to" + oldVersion + ".json");
+    }
+
+    /**
+     * To be overridden.
+     */
+    protected void loadVBExtras(JsonObject oldMappings, JsonObject newMappings) {
+    }
+
+    protected boolean shouldWarnOnMissing(String key) {
+        return !key.equals("blocks") && !key.equals("statistics");
+    }
+
+    /**
+     * @see #getMappedItem(int) for custom backwards mappings
+     */
+    @Override
+    public int getNewItemId(int id) {
+        // Don't warn on missing here
+        return this.itemMappings.get(id);
+    }
+
+    @Override
+    public int getNewBlockId(int id) {
+        // Don't warn on missing here
+        return this.blockMappings.getNewId(id);
+    }
+
+    @Override
+    public int getOldItemId(final int id) {
+        // Warn on missing
+        return checkValidity(id, this.itemMappings.inverse().get(id), "item");
+    }
+
+    @Nullable
+    public MappedItem getMappedItem(int id) {
+        return backwardsItemMappings != null ? backwardsItemMappings.get(id) : null;
+    }
+
+    @Nullable
+    public String getMappedNamedSound(String id) {
+        return backwardsSoundMappings != null ? backwardsSoundMappings.get(id) : null;
+    }
+
+    @Nullable
+    public Int2ObjectMap<MappedItem> getBackwardsItemMappings() {
+        return backwardsItemMappings;
+    }
+
+    @Nullable
+    public Map<String, String> getBackwardsSoundMappings() {
+        return backwardsSoundMappings;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/data/MappedItem.java

@@ -0,0 +1,23 @@
+package nl.matsv.viabackwards.api.data;
+
+import net.md_5.bungee.api.ChatColor;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+
+public class MappedItem {
+
+    private final int id;
+    private final String jsonName;
+
+    public MappedItem(int id, String name) {
+        this.id = id;
+        this.jsonName = ChatRewriter.legacyTextToJson(ChatColor.RESET + name).toString();
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public String getJsonName() {
+        return jsonName;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/data/MappedLegacyBlockItem.java

@@ -0,0 +1,61 @@
+package nl.matsv.viabackwards.api.data;
+
+import net.md_5.bungee.api.ChatColor;
+import nl.matsv.viabackwards.utils.Block;
+import org.jetbrains.annotations.Nullable;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+
+public class MappedLegacyBlockItem {
+
+    private final int id;
+    private final short data;
+    private final String name;
+    private final Block block;
+    private BlockEntityHandler blockEntityHandler;
+
+    public MappedLegacyBlockItem(int id, short data, @Nullable String name, boolean block) {
+        this.id = id;
+        this.data = data;
+        this.name = name != null ? ChatColor.RESET + name : null;
+        this.block = block ? new Block(id, data) : null;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    public short getData() {
+        return data;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public boolean isBlock() {
+        return block != null;
+    }
+
+    public Block getBlock() {
+        return block;
+    }
+
+    public boolean hasBlockEntityHandler() {
+        return blockEntityHandler != null;
+    }
+
+    @Nullable
+    public BlockEntityHandler getBlockEntityHandler() {
+        return blockEntityHandler;
+    }
+
+    public void setBlockEntityHandler(@Nullable BlockEntityHandler blockEntityHandler) {
+        this.blockEntityHandler = blockEntityHandler;
+    }
+
+    @FunctionalInterface
+    public interface BlockEntityHandler {
+
+        CompoundTag handleOrNewCompoundTag(int block, CompoundTag tag);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/data/VBMappingDataLoader.java

@@ -0,0 +1,144 @@
+package nl.matsv.viabackwards.api.data;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.MappingDataLoader;
+import us.myles.ViaVersion.util.GsonUtil;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+import us.myles.viaversion.libs.fastutil.objects.Object2IntMap;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonIOException;
+import us.myles.viaversion.libs.gson.JsonObject;
+import us.myles.viaversion.libs.gson.JsonPrimitive;
+import us.myles.viaversion.libs.gson.JsonSyntaxException;
+
+import java.io.File;
+import java.io.FileReader;
+import java.io.IOException;
+import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.util.HashMap;
+import java.util.Map;
+
+public class VBMappingDataLoader {
+
+    public static JsonObject loadFromDataDir(String name) {
+        File file = new File(ViaBackwards.getPlatform().getDataFolder(), name);
+        if (!file.exists()) return loadData(name);
+
+        // Load the file from the platform's directory if present
+        try (FileReader reader = new FileReader(file)) {
+            return GsonUtil.getGson().fromJson(reader, JsonObject.class);
+        } catch (JsonSyntaxException e) {
+            ViaBackwards.getPlatform().getLogger().warning(name + " is badly formatted!");
+            e.printStackTrace();
+            ViaBackwards.getPlatform().getLogger().warning("Falling back to resource's file!");
+            return loadData(name);
+        } catch (IOException | JsonIOException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    public static JsonObject loadData(String name) {
+        InputStream stream = VBMappingDataLoader.class.getClassLoader().getResourceAsStream("assets/viabackwards/data/" + name);
+        try (InputStreamReader reader = new InputStreamReader(stream)) {
+            return GsonUtil.getGson().fromJson(reader, JsonObject.class);
+        } catch (IOException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public static void mapIdentifiers(short[] output, JsonObject oldIdentifiers, JsonObject newIdentifiers, JsonObject diffIdentifiers) {
+        mapIdentifiers(output, oldIdentifiers, newIdentifiers, diffIdentifiers, true);
+    }
+
+    public static void mapIdentifiers(short[] output, JsonObject oldIdentifiers, JsonObject newIdentifiers, JsonObject diffIdentifiers, boolean warnOnMissing) {
+        Object2IntMap newIdentifierMap = MappingDataLoader.indexedObjectToMap(newIdentifiers);
+        for (Map.Entry<String, JsonElement> entry : oldIdentifiers.entrySet()) {
+            String key = entry.getValue().getAsString();
+            int mappedId = newIdentifierMap.getInt(key);
+            if (mappedId == -1) {
+                if (diffIdentifiers != null) {
+                    // Search in diff mappings
+                    JsonPrimitive diffValueJson = diffIdentifiers.getAsJsonPrimitive(key);
+                    String diffValue = diffValueJson != null ? diffValueJson.getAsString() : null;
+
+                    int dataIndex;
+                    if (diffValue == null && (dataIndex = key.indexOf('[')) != -1
+                            && (diffValueJson = diffIdentifiers.getAsJsonPrimitive(key.substring(0, dataIndex))) != null) {
+                        // Check for wildcard mappings
+                        diffValue = diffValueJson.getAsString();
+
+                        // Keep original properties if value ends with [
+                        if (diffValue.endsWith("[")) {
+                            diffValue += key.substring(dataIndex + 1);
+                        }
+                    }
+
+                    if (diffValue != null) {
+                        mappedId = newIdentifierMap.getInt(diffValue);
+                    }
+                }
+
+                if (mappedId == -1) {
+                    // Nothing found :(
+                    if (warnOnMissing && !Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                        ViaBackwards.getPlatform().getLogger().warning("No key for " + entry.getValue() + " :( ");
+                    }
+                    continue;
+                }
+            }
+
+            output[Integer.parseInt(entry.getKey())] = (short) mappedId;
+        }
+    }
+
+    public static Map<String, String> objectToMap(JsonObject object) {
+        Map<String, String> mappings = new HashMap<>();
+        for (Map.Entry<String, JsonElement> entry : object.entrySet()) {
+            String key = entry.getKey();
+            if (key.indexOf(':') == -1) {
+                key = "minecraft:" + key;
+            }
+            String value = entry.getValue().getAsString();
+            if (value.indexOf(':') == -1) {
+                value = "minecraft:" + value;
+            }
+            mappings.put(key, value);
+        }
+        return mappings;
+    }
+
+    public static Int2ObjectMap<MappedItem> loadItemMappings(JsonObject oldMapping, JsonObject newMapping, JsonObject diffMapping) {
+        Int2ObjectMap<MappedItem> itemMapping = new Int2ObjectOpenHashMap<>(diffMapping.size(), 1F);
+        Object2IntMap newIdenfierMap = MappingDataLoader.indexedObjectToMap(newMapping);
+        Object2IntMap oldIdenfierMap = MappingDataLoader.indexedObjectToMap(oldMapping);
+        for (Map.Entry<String, JsonElement> entry : diffMapping.entrySet()) {
+            JsonObject object = entry.getValue().getAsJsonObject();
+            String mappedIdName = object.getAsJsonPrimitive("id").getAsString();
+            int mappedId = newIdenfierMap.getInt(mappedIdName);
+            if (mappedId == -1) {
+                if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                    ViaBackwards.getPlatform().getLogger().warning("No key for " + mappedIdName + " :( ");
+                }
+                continue;
+            }
+
+            int oldId = oldIdenfierMap.getInt(entry.getKey());
+            if (oldId == -1) {
+                if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                    ViaBackwards.getPlatform().getLogger().warning("No old entry for " + mappedIdName + " :( ");
+                }
+                continue;
+            }
+
+            String name = object.getAsJsonPrimitive("name").getAsString();
+            itemMapping.put(oldId, new MappedItem(mappedId, name));
+        }
+
+        return itemMapping;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/data/VBMappings.java

@@ -0,0 +1,33 @@
+package nl.matsv.viabackwards.api.data;
+
+import us.myles.ViaVersion.api.data.Mappings;
+import us.myles.viaversion.libs.gson.JsonArray;
+import us.myles.viaversion.libs.gson.JsonObject;
+
+import java.util.Arrays;
+
+public class VBMappings extends Mappings {
+
+    public VBMappings(int size, JsonObject oldMapping, JsonObject newMapping, JsonObject diffMapping, boolean warnOnMissing) {
+        super(create(size, oldMapping, newMapping, diffMapping, warnOnMissing));
+    }
+
+    public VBMappings(JsonObject oldMapping, JsonObject newMapping, JsonObject diffMapping, boolean warnOnMissing) {
+        super(create(oldMapping.entrySet().size(), oldMapping, newMapping, diffMapping, warnOnMissing));
+    }
+
+    public VBMappings(JsonObject oldMapping, JsonObject newMapping, boolean warnOnMissing) {
+        this(oldMapping, newMapping, null, warnOnMissing);
+    }
+
+    public VBMappings(JsonArray oldMapping, JsonArray newMapping, JsonObject diffMapping, boolean warnOnMissing) {
+        super(oldMapping.size(), oldMapping, newMapping, diffMapping, warnOnMissing);
+    }
+
+    private static short[] create(int size, JsonObject oldMapping, JsonObject newMapping, JsonObject diffMapping, boolean warnOnMissing) {
+        short[] oldToNew = new short[size];
+        Arrays.fill(oldToNew, (short) -1);
+        VBMappingDataLoader.mapIdentifiers(oldToNew, oldMapping, newMapping, diffMapping, warnOnMissing);
+        return oldToNew;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/meta/MetaHandler.java

@@ -0,0 +1,19 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.meta;
+
+import nl.matsv.viabackwards.api.exceptions.RemovedValueException;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+
+public interface MetaHandler {
+
+    Metadata handle(MetaHandlerEvent e) throws RemovedValueException;
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/meta/MetaHandlerEvent.java

@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.meta;
+
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.api.entities.storage.MetaStorage;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MetaHandlerEvent {
+    private final UserConnection user;
+    private final EntityTracker.StoredEntity entity;
+    private final int index;
+    private final Metadata data;
+    private final MetaStorage storage;
+    private List<Metadata> extraData;
+
+    public MetaHandlerEvent(UserConnection user, EntityTracker.StoredEntity entity, int index, Metadata data, MetaStorage storage) {
+        this.user = user;
+        this.entity = entity;
+        this.index = index;
+        this.data = data;
+        this.storage = storage;
+    }
+
+    public boolean hasData() {
+        return data != null;
+    }
+
+    public Metadata getMetaByIndex(int index) {
+        for (Metadata meta : storage.getMetaDataList()) {
+            if (index == meta.getId()) {
+                return meta;
+            }
+        }
+        return null;
+    }
+
+    public void clearExtraData() {
+        extraData = null;
+    }
+
+    public void createMeta(Metadata metadata) {
+        (extraData != null ? extraData : (extraData = new ArrayList<>())).add(metadata);
+    }
+
+    public UserConnection getUser() {
+        return user;
+    }
+
+    public EntityTracker.StoredEntity getEntity() {
+        return entity;
+    }
+
+    public int getIndex() {
+        return index;
+    }
+
+    public Metadata getData() {
+        return data;
+    }
+
+    public MetaStorage getStorage() {
+        return storage;
+    }
+
+    /**
+     * May be null, use {@link #createMeta(Metadata)} for adding metadata.
+     */
+    @Nullable
+    public List<Metadata> getExtraData() {
+        return extraData;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/meta/MetaHandlerSettings.java

@@ -0,0 +1,118 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.meta;
+
+import nl.matsv.viabackwards.api.exceptions.RemovedValueException;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+
+public class MetaHandlerSettings {
+    private EntityType filterType;
+    private boolean filterFamily;
+    private int filterIndex = -1;
+    private MetaHandler handler;
+
+    public MetaHandlerSettings filter(EntityType type) {
+        return filter(type, filterFamily, filterIndex);
+    }
+
+    public MetaHandlerSettings filter(EntityType type, boolean filterFamily) {
+        return filter(type, filterFamily, filterIndex);
+    }
+
+    public MetaHandlerSettings filter(int index) {
+        return filter(filterType, filterFamily, index);
+    }
+
+    public MetaHandlerSettings filter(EntityType type, int index) {
+        return filter(type, filterFamily, index);
+    }
+
+    public MetaHandlerSettings filter(EntityType type, boolean filterFamily, int index) {
+        this.filterType = type;
+        this.filterFamily = filterFamily;
+        this.filterIndex = index;
+        return this;
+    }
+
+    public void handle(@Nullable MetaHandler handler) {
+        this.handler = handler;
+    }
+
+    public void handleIndexChange(final int newIndex) {
+        handle(e -> {
+            Metadata data = e.getData();
+            data.setId(newIndex);
+            return data;
+        });
+    }
+
+    public void removed() {
+        handle(e -> {
+            throw RemovedValueException.EX;
+        });
+    }
+
+    public boolean hasHandler() {
+        return handler != null;
+    }
+
+    public boolean hasType() {
+        return filterType != null;
+    }
+
+    public boolean hasIndex() {
+        return filterIndex > -1;
+    }
+
+    public boolean isFilterFamily() {
+        return filterFamily;
+    }
+
+    /**
+     * Returns true if the metadata should be handled by this object.
+     *
+     * @param type     entity type
+     * @param metadata metadata
+     * @return true if gucci
+     */
+    public boolean isGucci(EntityType type, Metadata metadata) {
+        if (!hasHandler()) return false;
+        if (hasType() && (filterFamily ? !type.isOrHasParent(filterType) : !filterType.is(type))) {
+            return false;
+        }
+        return !hasIndex() || metadata.getId() == filterIndex;
+    }
+
+    public EntityType getFilterType() {
+        return filterType;
+    }
+
+    public int getFilterIndex() {
+        return filterIndex;
+    }
+
+    @Nullable
+    public MetaHandler getHandler() {
+        return handler;
+    }
+
+    @Override
+    public String toString() {
+        return "MetaHandlerSettings{" +
+                "filterType=" + filterType +
+                ", filterFamily=" + filterFamily +
+                ", filterIndex=" + filterIndex +
+                ", handler=" + handler +
+                '}';
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/EntityData.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.storage;
+
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+
+public class EntityData {
+    private final int id;
+    private final int replacementId;
+    private Object mobName;
+    private MetaCreator defaultMeta;
+
+    public EntityData(int id, int replacementId) {
+        this.id = id;
+        this.replacementId = replacementId;
+    }
+
+    public EntityData jsonName(String name) {
+        this.mobName = ChatRewriter.legacyTextToJson(name);
+        return this;
+    }
+
+    public EntityData mobName(String name) {
+        this.mobName = name;
+        return this;
+    }
+
+    public EntityData spawnMetadata(MetaCreator handler) {
+        this.defaultMeta = handler;
+        return this;
+    }
+
+    public boolean hasBaseMeta() {
+        return this.defaultMeta != null;
+    }
+
+    public int getId() {
+        return id;
+    }
+
+    /**
+     * @return custom mobname, can be either a String or a JsonElement
+     */
+    @Nullable
+    public Object getMobName() {
+        return mobName;
+    }
+
+    public int getReplacementId() {
+        return replacementId;
+    }
+
+    @Nullable
+    public MetaCreator getDefaultMeta() {
+        return defaultMeta;
+    }
+
+    public boolean isObject() {
+        return false;
+    }
+
+    public int getObjectData() {
+        return -1;
+    }
+
+    @Override
+    public String toString() {
+        return "EntityData{" +
+                "id=" + id +
+                ", mobName='" + mobName + '\'' +
+                ", replacementId=" + replacementId +
+                ", defaultMeta=" + defaultMeta +
+                '}';
+    }
+
+    @FunctionalInterface
+    public interface MetaCreator {
+
+        void createMeta(MetaStorage storage);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/EntityObjectData.java

@@ -0,0 +1,22 @@
+package nl.matsv.viabackwards.api.entities.storage;
+
+public class EntityObjectData extends EntityData {
+    private final boolean isObject;
+    private final int objectData;
+
+    public EntityObjectData(int id, boolean isObject, int replacementId, int objectData) {
+        super(id, replacementId);
+        this.isObject = isObject;
+        this.objectData = objectData;
+    }
+
+    @Override
+    public boolean isObject() {
+        return isObject;
+    }
+
+    @Override
+    public int getObjectData() {
+        return objectData;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/EntityPositionHandler.java

@@ -0,0 +1,97 @@
+package nl.matsv.viabackwards.api.entities.storage;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.rewriters.EntityRewriterBase;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+
+import java.util.function.Supplier;
+
+public class EntityPositionHandler {
+
+    public static final double RELATIVE_MOVE_FACTOR = 32 * 128;
+    private final EntityRewriterBase<?> entityRewriter;
+    private final Class<? extends EntityPositionStorage> storageClass;
+    private final Supplier<? extends EntityPositionStorage> storageSupplier;
+    private boolean warnedForMissingEntity;
+
+    public EntityPositionHandler(EntityRewriterBase<?> entityRewriter,
+                                 Class<? extends EntityPositionStorage> storageClass, Supplier<? extends EntityPositionStorage> storageSupplier) {
+        this.entityRewriter = entityRewriter;
+        this.storageClass = storageClass;
+        this.storageSupplier = storageSupplier;
+    }
+
+    public void cacheEntityPosition(PacketWrapper wrapper, boolean create, boolean relative) throws Exception {
+        cacheEntityPosition(wrapper,
+                wrapper.get(Type.DOUBLE, 0), wrapper.get(Type.DOUBLE, 1), wrapper.get(Type.DOUBLE, 2), create, relative);
+    }
+
+    public void cacheEntityPosition(PacketWrapper wrapper, double x, double y, double z, boolean create, boolean relative) throws Exception {
+        int entityId = wrapper.get(Type.VAR_INT, 0);
+        EntityTracker.StoredEntity storedEntity = entityRewriter.getEntityTracker(wrapper.user()).getEntity(entityId);
+        if (storedEntity == null) {
+            if (Via.getManager().isDebug()) { // There is too many plugins violating this out there, and reading seems to be hard! :>
+                ViaBackwards.getPlatform().getLogger().warning("Stored entity with id " + entityId + " missing at position: " + x + " - " + y + " - " + z + " in " + storageClass.getSimpleName());
+                if (entityId == -1 && x == 0 && y == 0 && z == 0) {
+                    ViaBackwards.getPlatform().getLogger().warning("DO NOT REPORT THIS TO VIA, THIS IS A PLUGIN ISSUE");
+                } else if (!warnedForMissingEntity) {
+                    warnedForMissingEntity = true;
+                    ViaBackwards.getPlatform().getLogger().warning("This is very likely caused by a plugin sending a teleport packet for an entity outside of the player's range.");
+                }
+            }
+            return;
+        }
+
+        EntityPositionStorage positionStorage = create ? storageSupplier.get() : storedEntity.get(storageClass);
+        if (positionStorage == null) {
+            ViaBackwards.getPlatform().getLogger().warning("Stored entity with id " + entityId + " missing " + storageClass.getSimpleName());
+            return;
+        }
+
+        positionStorage.setCoordinates(x, y, z, relative);
+        storedEntity.put(positionStorage);
+    }
+
+    public EntityPositionStorage getStorage(UserConnection user, int entityId) {
+        EntityTracker.StoredEntity storedEntity = user.get(EntityTracker.class).get(entityRewriter.getProtocol()).getEntity(entityId);
+        EntityPositionStorage entityStorage;
+        if (storedEntity == null || (entityStorage = storedEntity.get(EntityPositionStorage.class)) == null) {
+            ViaBackwards.getPlatform().getLogger().warning("Untracked entity with id " + entityId + " in " + storageClass.getSimpleName());
+            return null;
+        }
+        return entityStorage;
+    }
+
+    public static void writeFacingAngles(PacketWrapper wrapper, double x, double y, double z, double targetX, double targetY, double targetZ) {
+        double dX = targetX - x;
+        double dY = targetY - y;
+        double dZ = targetZ - z;
+        double r = Math.sqrt(dX * dX + dY * dY + dZ * dZ);
+        double yaw = -Math.atan2(dX, dZ) / Math.PI * 180;
+        if (yaw < 0) {
+            yaw = 360 + yaw;
+        }
+        double pitch = -Math.asin(dY / r) / Math.PI * 180;
+
+        wrapper.write(Type.BYTE, (byte) (yaw * 256f / 360f));
+        wrapper.write(Type.BYTE, (byte) (pitch * 256f / 360f));
+    }
+
+    public static void writeFacingDegrees(PacketWrapper wrapper, double x, double y, double z, double targetX, double targetY, double targetZ) {
+        double dX = targetX - x;
+        double dY = targetY - y;
+        double dZ = targetZ - z;
+        double r = Math.sqrt(dX * dX + dY * dY + dZ * dZ);
+        double yaw = -Math.atan2(dX, dZ) / Math.PI * 180;
+        if (yaw < 0) {
+            yaw = 360 + yaw;
+        }
+        double pitch = -Math.asin(dY / r) / Math.PI * 180;
+
+        wrapper.write(Type.FLOAT, (float) yaw);
+        wrapper.write(Type.FLOAT, (float) pitch);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/EntityPositionStorage.java

@@ -0,0 +1,31 @@
+package nl.matsv.viabackwards.api.entities.storage;
+
+public abstract class EntityPositionStorage implements EntityStorage {
+    private double x;
+    private double y;
+    private double z;
+
+    public double getX() {
+        return x;
+    }
+
+    public double getY() {
+        return y;
+    }
+
+    public double getZ() {
+        return z;
+    }
+
+    public void setCoordinates(double x, double y, double z, boolean relative) {
+        if (relative) {
+            this.x += x;
+            this.y += y;
+            this.z += z;
+        } else {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/EntityStorage.java

@@ -0,0 +1,14 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.storage;
+
+public interface EntityStorage {
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/EntityTracker.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.storage;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.entities.EntityType;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class EntityTracker extends StoredObject {
+    private final Map<BackwardsProtocol, ProtocolEntityTracker> trackers = new ConcurrentHashMap<>();
+
+    public EntityTracker(UserConnection user) {
+        super(user);
+    }
+
+    public void initProtocol(BackwardsProtocol protocol) {
+        trackers.put(protocol, new ProtocolEntityTracker());
+    }
+
+    @Nullable
+    public ProtocolEntityTracker get(BackwardsProtocol protocol) {
+        return trackers.get(protocol);
+    }
+
+    public static class ProtocolEntityTracker {
+        private final Map<Integer, StoredEntity> entityMap = new ConcurrentHashMap<>();
+
+        public void trackEntityType(int id, EntityType type) {
+            entityMap.putIfAbsent(id, new StoredEntity(id, type));
+        }
+
+        public void removeEntity(int id) {
+            entityMap.remove(id);
+        }
+
+        @Nullable
+        public EntityType getEntityType(int id) {
+            StoredEntity storedEntity = entityMap.get(id);
+            return storedEntity != null ? storedEntity.getType() : null;
+        }
+
+        @Nullable
+        public StoredEntity getEntity(int id) {
+            return entityMap.get(id);
+        }
+    }
+
+    public static final class StoredEntity {
+        private final int entityId;
+        private final EntityType type;
+        private final Map<Class<? extends EntityStorage>, EntityStorage> storedObjects = new ConcurrentHashMap<>();
+
+        private StoredEntity(final int entityId, final EntityType type) {
+            this.entityId = entityId;
+            this.type = type;
+        }
+
+        /**
+         * Get an object from the storage
+         *
+         * @param objectClass The class of the object to get
+         * @param <T>         The type of the class you want to get.
+         * @return The requested object
+         */
+        @Nullable
+        public <T extends EntityStorage> T get(Class<T> objectClass) {
+            return (T) storedObjects.get(objectClass);
+        }
+
+        /**
+         * Check if the storage has an object
+         *
+         * @param objectClass The object class to check
+         * @return True if the object is in the storage
+         */
+        public boolean has(Class<? extends EntityStorage> objectClass) {
+            return storedObjects.containsKey(objectClass);
+        }
+
+        /**
+         * Put an object into the stored objects based on class
+         *
+         * @param object The object to store.
+         */
+        public void put(EntityStorage object) {
+            storedObjects.put(object.getClass(), object);
+        }
+
+        public int getEntityId() {
+            return entityId;
+        }
+
+        public EntityType getType() {
+            return type;
+        }
+
+        @Override
+        public String toString() {
+            return "StoredEntity{" +
+                    "entityId=" + entityId +
+                    ", type=" + type +
+                    ", storedObjects=" + storedObjects +
+                    '}';
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/MetaStorage.java

@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.entities.storage;
+
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+
+import java.util.List;
+
+public class MetaStorage {
+    private List<Metadata> metaDataList;
+
+    public MetaStorage(List<Metadata> metaDataList) {
+        this.metaDataList = metaDataList;
+    }
+
+    public boolean has(Metadata data) {
+        return this.metaDataList.contains(data);
+    }
+
+    public void delete(Metadata data) {
+        this.metaDataList.remove(data);
+    }
+
+    public void delete(int index) {
+        metaDataList.removeIf(meta -> meta.getId() == index);
+    }
+
+    public void add(Metadata data) {
+        this.metaDataList.add(data);
+    }
+
+    @Nullable
+    public Metadata get(int index) {
+        for (Metadata meta : this.metaDataList) {
+            if (index == meta.getId()) {
+                return meta;
+            }
+        }
+        return null;
+    }
+
+    public Metadata getOrDefault(int index, Metadata data) {
+        return getOrDefault(index, false, data);
+    }
+
+    public Metadata getOrDefault(int index, boolean removeIfExists, Metadata data) {
+        Metadata existingData = get(index);
+        if (removeIfExists && existingData != null) {
+            delete(existingData);
+        }
+        return existingData != null ? existingData : data;
+    }
+
+    public List<Metadata> getMetaDataList() {
+        return metaDataList;
+    }
+
+    public void setMetaDataList(List<Metadata> metaDataList) {
+        this.metaDataList = metaDataList;
+    }
+
+    @Override
+    public String toString() {
+        return "MetaStorage{" + "metaDataList=" + metaDataList + '}';
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/entities/storage/PlayerPositionStorage.java

@@ -0,0 +1,56 @@
+package nl.matsv.viabackwards.api.entities.storage;
+
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+
+public abstract class PlayerPositionStorage extends StoredObject {
+    private double x;
+    private double y;
+    private double z;
+
+    protected PlayerPositionStorage(UserConnection user) {
+        super(user);
+    }
+
+    public double getX() {
+        return x;
+    }
+
+    public double getY() {
+        return y;
+    }
+
+    public double getZ() {
+        return z;
+    }
+
+    public void setX(final double x) {
+        this.x = x;
+    }
+
+    public void setY(final double y) {
+        this.y = y;
+    }
+
+    public void setZ(final double z) {
+        this.z = z;
+    }
+
+    public void setCoordinates(PacketWrapper wrapper, boolean relative) throws Exception {
+        setCoordinates(wrapper.get(Type.DOUBLE, 0), wrapper.get(Type.DOUBLE, 1), wrapper.get(Type.DOUBLE, 2), relative);
+    }
+
+    public void setCoordinates(double x, double y, double z, boolean relative) {
+        if (relative) {
+            this.x += x;
+            this.y += y;
+            this.z += z;
+        } else {
+            this.x = x;
+            this.y = y;
+            this.z = z;
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/exceptions/RemovedValueException.java

@@ -0,0 +1,26 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.exceptions;
+
+import java.io.IOException;
+
+public class RemovedValueException extends IOException {
+
+    /**
+     * May be cached since it is never actually printed, only checked.
+     */
+    public static final RemovedValueException EX = new RemovedValueException() {
+        @Override
+        public Throwable fillInStackTrace() {
+            return this;
+        }
+    };
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/EnchantmentRewriter.java

@@ -0,0 +1,168 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ByteTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ListTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ShortTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class EnchantmentRewriter {
+
+    private final Map<String, String> enchantmentMappings = new HashMap<>();
+    private final String nbtTagName;
+    private final boolean jsonFormat;
+
+    public EnchantmentRewriter(String nbtTagName, boolean jsonFormat) {
+        this.nbtTagName = nbtTagName;
+        this.jsonFormat = jsonFormat;
+    }
+
+    public EnchantmentRewriter(String nbtTagName) {
+        this(nbtTagName, true);
+    }
+
+    public void registerEnchantment(String key, String replacementLore) {
+        enchantmentMappings.put(key, replacementLore);
+    }
+
+    public void handleToClient(Item item) {
+        CompoundTag tag = item.getTag();
+        if (tag == null) return;
+
+        if (tag.get("Enchantments") instanceof ListTag) {
+            rewriteEnchantmentsToClient(tag, false);
+        }
+        if (tag.get("StoredEnchantments") instanceof ListTag) {
+            rewriteEnchantmentsToClient(tag, true);
+        }
+    }
+
+    public void handleToServer(Item item) {
+        CompoundTag tag = item.getTag();
+        if (tag == null) return;
+
+        if (tag.contains(nbtTagName + "|Enchantments")) {
+            rewriteEnchantmentsToServer(tag, false);
+        }
+        if (tag.contains(nbtTagName + "|StoredEnchantments")) {
+            rewriteEnchantmentsToServer(tag, true);
+        }
+    }
+
+    public void rewriteEnchantmentsToClient(CompoundTag tag, boolean storedEnchant) {
+        String key = storedEnchant ? "StoredEnchantments" : "Enchantments";
+        ListTag enchantments = tag.get(key);
+        ListTag remappedEnchantments = new ListTag(nbtTagName + "|" + key, CompoundTag.class);
+        List<Tag> lore = new ArrayList<>();
+        for (Tag enchantmentEntry : enchantments.clone()) {
+            String newId = (String) ((CompoundTag) enchantmentEntry).get("id").getValue();
+            String enchantmentName = enchantmentMappings.get(newId);
+            if (enchantmentName != null) {
+                enchantments.remove(enchantmentEntry);
+                Number level = (Number) ((CompoundTag) enchantmentEntry).get("lvl").getValue();
+                String loreValue = enchantmentName + " " + getRomanNumber(level.intValue());
+                if (jsonFormat) {
+                    loreValue = ChatRewriter.legacyTextToJson(loreValue).toString();
+                }
+
+                lore.add(new StringTag("", loreValue));
+                remappedEnchantments.add(enchantmentEntry);
+            }
+        }
+        if (!lore.isEmpty()) {
+            if (!storedEnchant && enchantments.size() == 0) {
+                CompoundTag dummyEnchantment = new CompoundTag("");
+                dummyEnchantment.put(new StringTag("id", ""));
+                dummyEnchantment.put(new ShortTag("lvl", (short) 0));
+                enchantments.add(dummyEnchantment);
+
+                tag.put(new ByteTag(nbtTagName + "|dummyEnchant"));
+            }
+
+            tag.put(remappedEnchantments);
+
+            CompoundTag display = tag.get("display");
+            if (display == null) {
+                tag.put(display = new CompoundTag("display"));
+            }
+            ListTag loreTag = display.get("Lore");
+            if (loreTag == null) {
+                display.put(loreTag = new ListTag("Lore", StringTag.class));
+            }
+
+            lore.addAll(loreTag.getValue());
+            loreTag.setValue(lore);
+        }
+    }
+
+    public void rewriteEnchantmentsToServer(CompoundTag tag, boolean storedEnchant) {
+        String key = storedEnchant ? "StoredEnchantments" : "Enchantments";
+        ListTag remappedEnchantments = tag.get(nbtTagName + "|" + key);
+        ListTag enchantments = tag.get(key);
+        if (enchantments == null) {
+            enchantments = new ListTag(key, CompoundTag.class);
+        }
+
+        if (!storedEnchant && tag.remove(nbtTagName + "|dummyEnchant") != null) {
+            for (Tag enchantment : enchantments.clone()) {
+                String id = (String) ((CompoundTag) enchantment).get("id").getValue();
+                if (id.isEmpty()) {
+                    enchantments.remove(enchantment);
+                }
+            }
+        }
+
+        CompoundTag display = tag.get("display");
+        // A few null checks just to be safe, though they shouldn't actually be
+        ListTag lore = display != null ? display.get("Lore") : null;
+        for (Tag enchantment : remappedEnchantments.clone()) {
+            enchantments.add(enchantment);
+            if (lore != null && lore.size() != 0) {
+                lore.remove(lore.get(0));
+            }
+        }
+        if (lore != null && lore.size() == 0) {
+            display.remove("Lore");
+            if (display.isEmpty()) {
+                tag.remove("display");
+            }
+        }
+        tag.put(enchantments);
+        tag.remove(remappedEnchantments.getName());
+    }
+
+    public static String getRomanNumber(int number) {
+        switch (number) {
+            case 1:
+                return "I";
+            case 2:
+                return "II";
+            case 3:
+                return "III";
+            case 4:
+                return "IV";
+            case 5:
+                return "V";
+            case 6:
+                return "VI";
+            case 7:
+                return "VII";
+            case 8:
+                return "VIII";
+            case 9:
+                return "IX";
+            case 10:
+                return "X";
+            default:
+                return Integer.toString(number);
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/EntityRewriter.java

@@ -0,0 +1,113 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.storage.EntityData;
+import nl.matsv.viabackwards.api.entities.storage.MetaStorage;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.minecraft.metadata.MetaType;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_14;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+
+import java.util.List;
+
+public abstract class EntityRewriter<T extends BackwardsProtocol> extends EntityRewriterBase<T> {
+
+    protected EntityRewriter(T protocol) {
+        this(protocol, MetaType1_14.OptChat, MetaType1_14.Boolean);
+    }
+
+    protected EntityRewriter(T protocol, MetaType displayType, MetaType displayVisibilityType) {
+        super(protocol, displayType, 2, displayVisibilityType, 3);
+    }
+
+    public void registerSpawnTrackerWithData(ClientboundPacketType packetType, EntityType fallingBlockType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - Entity UUID
+                map(Type.VAR_INT); // 2 - Entity Type
+                map(Type.DOUBLE); // 3 - X
+                map(Type.DOUBLE); // 4 - Y
+                map(Type.DOUBLE); // 5 - Z
+                map(Type.BYTE); // 6 - Pitch
+                map(Type.BYTE); // 7 - Yaw
+                map(Type.INT); // 8 - Data
+                handler(wrapper -> {
+                    EntityType entityType = setOldEntityId(wrapper);
+                    if (entityType == fallingBlockType) {
+                        int blockState = wrapper.get(Type.INT, 0);
+                        wrapper.set(Type.INT, 0, protocol.getMappingData().getNewBlockStateId(blockState));
+                    }
+                });
+            }
+        });
+    }
+
+    public void registerSpawnTracker(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.UUID); // 1 - Entity UUID
+                map(Type.VAR_INT); // 2 - Entity Type
+                handler(wrapper -> setOldEntityId(wrapper));
+            }
+        });
+    }
+
+    private EntityType setOldEntityId(PacketWrapper wrapper) throws Exception {
+        int typeId = wrapper.get(Type.VAR_INT, 1);
+        EntityType entityType = getTypeFromId(typeId);
+        addTrackedEntity(wrapper, wrapper.get(Type.VAR_INT, 0), entityType);
+
+        int oldTypeId = getOldEntityId(entityType.getId());
+        if (typeId != oldTypeId) {
+            wrapper.set(Type.VAR_INT, 1, oldTypeId);
+        }
+
+        return entityType;
+    }
+
+    /**
+     * Helper method to handle a metadata list packet and its full initial meta rewrite.
+     */
+    protected void registerMetadataRewriter(ClientboundPacketType packetType, Type<List<Metadata>> oldMetaType, Type<List<Metadata>> newMetaType) {
+        getProtocol().registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                if (oldMetaType != null) {
+                    map(oldMetaType, newMetaType);
+                } else {
+                    map(newMetaType);
+                }
+                handler(wrapper -> {
+                    int entityId = wrapper.get(Type.VAR_INT, 0);
+                    EntityType type = getEntityType(wrapper.user(), entityId);
+
+                    MetaStorage storage = new MetaStorage(wrapper.get(newMetaType, 0));
+                    handleMeta(wrapper.user(), entityId, storage);
+
+                    EntityData entityData = getEntityData(type);
+                    //TODO only do this once for a first meta packet?
+                    if (entityData != null) {
+                        if (entityData.hasBaseMeta()) {
+                            entityData.getDefaultMeta().createMeta(storage);
+                        }
+                    }
+
+                    wrapper.set(newMetaType, 0, storage.getMetaDataList());
+                });
+            }
+        });
+    }
+
+    protected void registerMetadataRewriter(ClientboundPacketType packetType, Type<List<Metadata>> metaType) {
+        registerMetadataRewriter(packetType, null, metaType);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/EntityRewriterBase.java

@@ -0,0 +1,291 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import com.google.common.base.Preconditions;
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.meta.MetaHandlerEvent;
+import nl.matsv.viabackwards.api.entities.meta.MetaHandlerSettings;
+import nl.matsv.viabackwards.api.entities.storage.EntityData;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.api.entities.storage.MetaStorage;
+import nl.matsv.viabackwards.api.exceptions.RemovedValueException;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.ParticleMappings;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.minecraft.metadata.MetaType;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.Particle;
+import us.myles.ViaVersion.exception.CancelException;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+import us.myles.viaversion.libs.fastutil.ints.Int2IntMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
+
+import java.util.ArrayList;
+import java.util.Comparator;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.logging.Logger;
+import java.util.stream.Collectors;
+
+/**
+ * Entity rewriter base class.
+ *
+ * @see EntityRewriter
+ * @see LegacyEntityRewriter
+ */
+public abstract class EntityRewriterBase<T extends BackwardsProtocol> extends Rewriter<T> {
+    private final Map<EntityType, EntityData> entityTypes = new HashMap<>();
+    private final List<MetaHandlerSettings> metaHandlers = new ArrayList<>();
+    private final MetaType displayNameMetaType;
+    private final MetaType displayVisibilityMetaType;
+    private final int displayNameIndex;
+    private final int displayVisibilityIndex;
+    protected Int2IntMap typeMapping;
+
+    EntityRewriterBase(T protocol, MetaType displayNameMetaType, int displayNameIndex,
+                       MetaType displayVisibilityMetaType, int displayVisibilityIndex) {
+        super(protocol);
+        this.displayNameMetaType = displayNameMetaType;
+        this.displayNameIndex = displayNameIndex;
+        this.displayVisibilityMetaType = displayVisibilityMetaType;
+        this.displayVisibilityIndex = displayVisibilityIndex;
+    }
+
+    protected EntityType getEntityType(UserConnection connection, int id) {
+        return getEntityTracker(connection).getEntityType(id);
+    }
+
+    protected void addTrackedEntity(PacketWrapper wrapper, int entityId, EntityType type) throws Exception {
+        getEntityTracker(wrapper.user()).trackEntityType(entityId, type);
+    }
+
+    protected boolean hasData(EntityType type) {
+        return entityTypes.containsKey(type);
+    }
+
+    @Nullable
+    protected EntityData getEntityData(EntityType type) {
+        return entityTypes.get(type);
+    }
+
+    /**
+     * Note that both types should be of the SAME version.
+     *
+     * @param oldType     old type of the higher version
+     * @param replacement new type of the higher version
+     * @return created entity data
+     * @see #mapEntityDirect(EntityType, EntityType) for id only rewriting
+     */
+    protected EntityData mapEntity(EntityType oldType, EntityType replacement) {
+        Preconditions.checkArgument(oldType.getClass() == replacement.getClass());
+
+        // Already rewrite the id here
+        int mappedReplacementId = getOldEntityId(replacement.getId());
+        EntityData data = new EntityData(oldType.getId(), mappedReplacementId);
+        mapEntityDirect(oldType.getId(), mappedReplacementId);
+        entityTypes.put(oldType, data);
+        return data;
+    }
+
+    /**
+     * Maps entity ids based on the enum constant's names.
+     *
+     * @param oldTypes     entity types of the higher version
+     * @param newTypeClass entity types enum class of the lower version
+     * @param <T>          new type class
+     */
+    public <T extends Enum<T> & EntityType> void mapTypes(EntityType[] oldTypes, Class<T> newTypeClass) {
+        if (typeMapping == null) {
+            typeMapping = new Int2IntOpenHashMap(oldTypes.length, 1F);
+            typeMapping.defaultReturnValue(-1);
+        }
+        for (EntityType oldType : oldTypes) {
+            try {
+                T newType = Enum.valueOf(newTypeClass, oldType.name());
+                typeMapping.put(oldType.getId(), newType.getId());
+            } catch (IllegalArgumentException ignored) {
+            }
+        }
+    }
+
+    /**
+     * Directly maps the entity without any other rewriting.
+     *
+     * @param oldType type of the higher version
+     * @param newType type of the lower version
+     * @see #mapEntity(EntityType, EntityType) for mapping with data
+     */
+    public void mapEntityDirect(EntityType oldType, EntityType newType) {
+        Preconditions.checkArgument(oldType.getClass() != newType.getClass());
+        mapEntityDirect(oldType.getId(), newType.getId());
+    }
+
+    private void mapEntityDirect(int oldType, int newType) {
+        if (typeMapping == null) {
+            typeMapping = new Int2IntOpenHashMap();
+            typeMapping.defaultReturnValue(-1);
+        }
+        typeMapping.put(oldType, newType);
+    }
+
+    public MetaHandlerSettings registerMetaHandler() {
+        MetaHandlerSettings settings = new MetaHandlerSettings();
+        metaHandlers.add(settings);
+        return settings;
+    }
+
+    protected MetaStorage handleMeta(UserConnection user, int entityId, MetaStorage storage) throws Exception {
+        EntityTracker.StoredEntity storedEntity = getEntityTracker(user).getEntity(entityId);
+        if (storedEntity == null) {
+            if (!Via.getConfig().isSuppressMetadataErrors()) {
+                ViaBackwards.getPlatform().getLogger().warning("Metadata for entity id: " + entityId + " not sent because the entity doesn't exist. " + storage);
+            }
+            throw CancelException.CACHED;
+        }
+
+        EntityType type = storedEntity.getType();
+        for (MetaHandlerSettings settings : metaHandlers) {
+            List<Metadata> newData = new ArrayList<>();
+            for (Metadata meta : storage.getMetaDataList()) {
+                MetaHandlerEvent event = null;
+                try {
+                    Metadata modifiedMeta = meta;
+                    if (settings.isGucci(type, meta)) {
+                        event = new MetaHandlerEvent(user, storedEntity, meta.getId(), meta, storage);
+                        modifiedMeta = settings.getHandler().handle(event);
+
+                        if (event.getExtraData() != null) {
+                            newData.addAll(event.getExtraData());
+                            event.clearExtraData();
+                        }
+                    }
+
+                    if (modifiedMeta == null) {
+                        throw RemovedValueException.EX;
+                    }
+
+                    newData.add(modifiedMeta);
+                } catch (RemovedValueException e) {
+                    // Add the additionally created data here in case of an interruption
+                    if (event != null && event.getExtraData() != null) {
+                        newData.addAll(event.getExtraData());
+                    }
+                } catch (Exception e) {
+                    Logger log = ViaBackwards.getPlatform().getLogger();
+                    log.warning("Unable to handle metadata " + meta + " for entity type " + type);
+                    log.warning(storage.getMetaDataList().stream().sorted(Comparator.comparingInt(Metadata::getId))
+                            .map(Metadata::toString).collect(Collectors.joining("\n", "Full metadata list: ", "")));
+                    e.printStackTrace();
+                }
+            }
+
+            storage.setMetaDataList(newData);
+        }
+
+        // Handle Entity Name
+        Metadata data = storage.get(displayNameIndex);
+        if (data != null) {
+            EntityData entityData = getEntityData(type);
+            // Set the name if there is no custom name set already
+            if (entityData != null && entityData.getMobName() != null
+                    && (data.getValue() == null || data.getValue().toString().isEmpty())
+                    && data.getMetaType().getTypeID() == displayNameMetaType.getTypeID()) {
+                data.setValue(entityData.getMobName());
+                if (ViaBackwards.getConfig().alwaysShowOriginalMobName()) {
+                    storage.delete(displayVisibilityIndex);
+                    storage.add(new Metadata(displayVisibilityIndex, displayVisibilityMetaType, true));
+                }
+            }
+        }
+
+        return storage;
+    }
+
+    /**
+     * Helper method to handle player, painting, or xp orb trackers without meta changes.
+     */
+    protected void registerExtraTracker(ClientboundPacketType packetType, EntityType entityType, Type intType) {
+        getProtocol().registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(intType); // 0 - Entity id
+                handler(wrapper -> addTrackedEntity(wrapper, (int) wrapper.get(intType, 0), entityType));
+            }
+        });
+    }
+
+    protected void registerExtraTracker(ClientboundPacketType packetType, EntityType entityType) {
+        registerExtraTracker(packetType, entityType, Type.VAR_INT);
+    }
+
+    protected void registerEntityDestroy(ClientboundPacketType packetType) {
+        getProtocol().registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT_ARRAY_PRIMITIVE); // 0 - Entity ids
+                handler(wrapper -> {
+                    EntityTracker.ProtocolEntityTracker tracker = getEntityTracker(wrapper.user());
+                    for (int entity : wrapper.get(Type.VAR_INT_ARRAY_PRIMITIVE, 0)) {
+                        tracker.removeEntity(entity);
+                    }
+                });
+            }
+        });
+    }
+
+    // ONLY TRACKS, DOESN'T REWRITE IDS
+    protected PacketHandler getTrackerHandler(Type intType, int typeIndex) {
+        return wrapper -> {
+            Number id = (Number) wrapper.get(intType, typeIndex);
+            addTrackedEntity(wrapper, wrapper.get(Type.VAR_INT, 0), getTypeFromId(id.intValue()));
+        };
+    }
+
+    protected PacketHandler getTrackerHandler() {
+        return getTrackerHandler(Type.VAR_INT, 1);
+    }
+
+    protected PacketHandler getTrackerHandler(EntityType entityType, Type intType) {
+        return wrapper -> addTrackedEntity(wrapper, (int) wrapper.get(intType, 0), entityType);
+    }
+
+    protected PacketHandler getDimensionHandler(int index) {
+        return wrapper -> {
+            ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+            int dimensionId = wrapper.get(Type.INT, index);
+            clientWorld.setEnvironment(dimensionId);
+        };
+    }
+
+    public EntityTracker.ProtocolEntityTracker getEntityTracker(UserConnection user) {
+        return user.get(EntityTracker.class).get(getProtocol());
+    }
+
+    protected void rewriteParticle(Particle particle) {
+        ParticleMappings mappings = protocol.getMappingData().getParticleMappings();
+        int id = particle.getId();
+        if (id == mappings.getBlockId() || id == mappings.getFallingDustId()) {
+            Particle.ParticleData data = particle.getArguments().get(0);
+            data.setValue(protocol.getMappingData().getNewBlockStateId(data.get()));
+        } else if (id == mappings.getItemId()) {
+            Particle.ParticleData data = particle.getArguments().get(0);
+            data.setValue(protocol.getMappingData().getNewItemId(data.get()));
+        }
+
+        particle.setId(protocol.getMappingData().getNewParticleId(id));
+    }
+
+    protected abstract EntityType getTypeFromId(int typeId);
+
+    public int getOldEntityId(int newId) {
+        return typeMapping != null ? typeMapping.getOrDefault(newId, newId) : newId;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/ItemRewriter.java

@@ -0,0 +1,103 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.data.MappedItem;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ByteTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ListTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+public abstract class ItemRewriter<T extends BackwardsProtocol> extends ItemRewriterBase<T> {
+
+    private final TranslatableRewriter translatableRewriter;
+
+    protected ItemRewriter(T protocol, @Nullable TranslatableRewriter translatableRewriter) {
+        super(protocol, true);
+        this.translatableRewriter = translatableRewriter;
+    }
+
+    @Override
+    @Nullable
+    public Item handleItemToClient(Item item) {
+        if (item == null) return null;
+
+        CompoundTag display = item.getTag() != null ? item.getTag().get("display") : null;
+        if (translatableRewriter != null && display != null) {
+            // Handle name and lore components
+            StringTag name = display.get("Name");
+            if (name != null) {
+                String newValue = translatableRewriter.processText(name.getValue()).toString();
+                if (!newValue.equals(name.getValue())) {
+                    saveNameTag(display, name);
+                }
+
+                name.setValue(newValue);
+            }
+
+            ListTag lore = display.get("Lore");
+            if (lore != null) {
+                ListTag original = null;
+                boolean changed = false;
+                for (Tag loreEntryTag : lore) {
+                    if (!(loreEntryTag instanceof StringTag)) continue;
+
+                    StringTag loreEntry = (StringTag) loreEntryTag;
+                    String newValue = translatableRewriter.processText(loreEntry.getValue()).toString();
+                    if (!changed && !newValue.equals(loreEntry.getValue())) {
+                        changed = true;
+                        original = lore.clone();
+                    }
+
+                    loreEntry.setValue(newValue);
+                }
+
+                if (changed) {
+                    saveLoreTag(display, original);
+                }
+            }
+        }
+
+        MappedItem data = protocol.getMappingData().getMappedItem(item.getIdentifier());
+        if (data == null) {
+            // Just rewrite the id
+            return super.handleItemToClient(item);
+        }
+
+        if (item.getTag() == null) {
+            item.setTag(new CompoundTag(""));
+        }
+
+        // Save original id, set remapped id
+        item.getTag().put(new IntTag(nbtTagName + "|id", item.getIdentifier()));
+        item.setIdentifier(data.getId());
+
+        // Set custom name - only done if there is no original one
+        if (display == null) {
+            item.getTag().put(display = new CompoundTag("display"));
+        }
+        if (!display.contains("Name")) {
+            display.put(new StringTag("Name", data.getJsonName()));
+            display.put(new ByteTag(nbtTagName + "|customName"));
+        }
+        return item;
+    }
+
+    @Override
+    @Nullable
+    public Item handleItemToServer(Item item) {
+        if (item == null) return null;
+
+        super.handleItemToServer(item);
+        if (item.getTag() != null) {
+            IntTag originalId = item.getTag().remove(nbtTagName + "|id");
+            if (originalId != null) {
+                item.setIdentifier(originalId.getValue());
+            }
+        }
+        return item;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/ItemRewriterBase.java

@@ -0,0 +1,74 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.viaversion.libs.opennbt.conversion.builtin.CompoundTagConverter;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ListTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+public abstract class ItemRewriterBase<T extends BackwardsProtocol> extends Rewriter<T> {
+
+    protected static final CompoundTagConverter CONVERTER = new CompoundTagConverter();
+    protected final String nbtTagName;
+    protected final boolean jsonNameFormat;
+
+    protected ItemRewriterBase(T protocol, boolean jsonNameFormat) {
+        super(protocol);
+        this.jsonNameFormat = jsonNameFormat;
+        nbtTagName = "VB|" + protocol.getClass().getSimpleName();
+    }
+
+    @Nullable
+    public Item handleItemToClient(Item item) {
+        if (item == null) return null;
+        if (protocol.getMappingData() != null) {
+            item.setIdentifier(protocol.getMappingData().getNewItemId(item.getIdentifier()));
+        }
+        return item;
+    }
+
+    @Nullable
+    public Item handleItemToServer(Item item) {
+        if (item == null) return null;
+        if (protocol.getMappingData() != null) {
+            item.setIdentifier(protocol.getMappingData().getOldItemId(item.getIdentifier()));
+        }
+        restoreDisplayTag(item);
+        return item;
+    }
+
+    protected void saveNameTag(CompoundTag displayTag, StringTag original) {
+        displayTag.put(new StringTag(nbtTagName + "|o" + original.getName(), original.getValue()));
+    }
+
+    protected void saveLoreTag(CompoundTag displayTag, ListTag original) {
+        displayTag.put(new ListTag(nbtTagName + "|o" + original.getName(), original.getValue()));
+    }
+
+    protected void restoreDisplayTag(Item item) {
+        if (item.getTag() == null) return;
+
+        CompoundTag display = item.getTag().get("display");
+        if (display != null) {
+            // Remove custom name / restore original name
+            if (display.remove(nbtTagName + "|customName") != null) {
+                display.remove("Name");
+            } else {
+                restoreDisplayTag(display, "Name");
+            }
+
+            // Restore lore
+            restoreDisplayTag(display, "Lore");
+        }
+    }
+
+    protected void restoreDisplayTag(CompoundTag displayTag, String tagName) {
+        Tag original = displayTag.remove(nbtTagName + "|o" + tagName);
+        if (original != null) {
+            displayTag.put(original);
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/LegacyBlockItemRewriter.java

@@ -0,0 +1,295 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.rewriters;
+
+import net.md_5.bungee.api.ChatColor;
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.data.MappedLegacyBlockItem;
+import nl.matsv.viabackwards.api.data.VBMappingDataLoader;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data.BlockColors;
+import nl.matsv.viabackwards.utils.Block;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
+import us.myles.ViaVersion.api.minecraft.chunks.ChunkSection;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+import us.myles.viaversion.libs.gson.JsonPrimitive;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ByteTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public abstract class LegacyBlockItemRewriter<T extends BackwardsProtocol> extends ItemRewriterBase<T> {
+
+    private static final Map<String, Int2ObjectMap<MappedLegacyBlockItem>> LEGACY_MAPPINGS = new HashMap<>();
+    protected final Int2ObjectMap<MappedLegacyBlockItem> replacementData;
+
+    static {
+        JsonObject jsonObject = VBMappingDataLoader.loadFromDataDir("legacy-mappings.json");
+        for (Map.Entry<String, JsonElement> entry : jsonObject.entrySet()) {
+            Int2ObjectMap<MappedLegacyBlockItem> mappings = new Int2ObjectOpenHashMap<>(8);
+            LEGACY_MAPPINGS.put(entry.getKey(), mappings);
+            for (Map.Entry<String, JsonElement> dataEntry : entry.getValue().getAsJsonObject().entrySet()) {
+                JsonObject object = dataEntry.getValue().getAsJsonObject();
+                int id = object.getAsJsonPrimitive("id").getAsInt();
+                JsonPrimitive jsonData = object.getAsJsonPrimitive("data");
+                short data = jsonData != null ? jsonData.getAsShort() : 0;
+                String name = object.getAsJsonPrimitive("name").getAsString();
+                JsonPrimitive blockField = object.getAsJsonPrimitive("block");
+                boolean block = blockField != null && blockField.getAsBoolean();
+
+                if (dataEntry.getKey().indexOf('-') != -1) {
+                    // Range of ids
+                    String[] split = dataEntry.getKey().split("-", 2);
+                    int from = Integer.parseInt(split[0]);
+                    int to = Integer.parseInt(split[1]);
+
+                    // Special block color handling
+                    if (name.contains("%color%")) {
+                        for (int i = from; i <= to; i++) {
+                            mappings.put(i, new MappedLegacyBlockItem(id, data, name.replace("%color%", BlockColors.get(i - from)), block));
+                        }
+                    } else {
+                        MappedLegacyBlockItem mappedBlockItem = new MappedLegacyBlockItem(id, data, name, block);
+                        for (int i = from; i <= to; i++) {
+                            mappings.put(i, mappedBlockItem);
+                        }
+                    }
+                } else {
+                    mappings.put(Integer.parseInt(dataEntry.getKey()), new MappedLegacyBlockItem(id, data, name, block));
+                }
+            }
+        }
+    }
+
+    protected LegacyBlockItemRewriter(T protocol) {
+        super(protocol, false);
+        replacementData = LEGACY_MAPPINGS.get(protocol.getClass().getSimpleName().split("To")[1].replace("_", "."));
+    }
+
+    @Override
+    @Nullable
+    public Item handleItemToClient(Item item) {
+        if (item == null) return null;
+
+        MappedLegacyBlockItem data = replacementData.get(item.getIdentifier());
+        if (data == null) {
+            // Just rewrite the id
+            return super.handleItemToClient(item);
+        }
+
+        short originalData = item.getData();
+        item.setIdentifier(data.getId());
+        // Keep original data if mapped data is set to -1
+        if (data.getData() != -1) {
+            item.setData(data.getData());
+        }
+
+        // Set display name
+        if (data.getName() != null) {
+            if (item.getTag() == null) {
+                item.setTag(new CompoundTag(""));
+            }
+
+            CompoundTag display = item.getTag().get("display");
+            if (display == null) {
+                item.getTag().put(display = new CompoundTag("display"));
+            }
+
+            StringTag nameTag = display.get("Name");
+            if (nameTag == null) {
+                display.put(nameTag = new StringTag("Name", data.getName()));
+                display.put(new ByteTag(nbtTagName + "|customName"));
+            }
+
+            // Handle colors
+            String value = nameTag.getValue();
+            if (value.contains("%vb_color%")) {
+                display.put(new StringTag("Name", value.replace("%vb_color%", BlockColors.get(originalData))));
+            }
+        }
+        return item;
+    }
+
+    public int handleBlockID(int idx) {
+        int type = idx >> 4;
+        int meta = idx & 15;
+
+        Block b = handleBlock(type, meta);
+        if (b == null) return idx;
+
+        return (b.getId() << 4 | (b.getData() & 15));
+    }
+
+    @Nullable
+    public Block handleBlock(int blockId, int data) {
+        MappedLegacyBlockItem settings = replacementData.get(blockId);
+        if (settings == null || !settings.isBlock()) return null;
+
+        Block block = settings.getBlock();
+        // For some blocks, the data can still be useful (:
+        if (block.getData() == -1) {
+            return block.withData(data);
+        }
+        return block;
+    }
+
+    protected void handleChunk(Chunk chunk) {
+        // Map Block Entities
+        Map<Pos, CompoundTag> tags = new HashMap<>();
+        for (CompoundTag tag : chunk.getBlockEntities()) {
+            Tag xTag;
+            Tag yTag;
+            Tag zTag;
+            if ((xTag = tag.get("x")) == null || (yTag = tag.get("y")) == null || (zTag = tag.get("z")) == null) {
+                continue;
+            }
+
+            Pos pos = new Pos(
+                    (int) xTag.getValue() & 0xF,
+                    (int) yTag.getValue(),
+                    (int) zTag.getValue() & 0xF);
+            tags.put(pos, tag);
+
+            // Handle given Block Entities
+            ChunkSection section = chunk.getSections()[pos.getY() >> 4];
+            if (section == null) continue;
+
+            int block = section.getFlatBlock(pos.getX(), pos.getY() & 0xF, pos.getZ());
+            int btype = block >> 4;
+
+            MappedLegacyBlockItem settings = replacementData.get(btype);
+            if (settings != null && settings.hasBlockEntityHandler()) {
+                settings.getBlockEntityHandler().handleOrNewCompoundTag(block, tag);
+            }
+        }
+
+        for (int i = 0; i < chunk.getSections().length; i++) {
+            ChunkSection section = chunk.getSections()[i];
+            if (section == null) continue;
+
+            boolean hasBlockEntityHandler = false;
+
+            // Map blocks
+            for (int j = 0; j < section.getPaletteSize(); j++) {
+                int block = section.getPaletteEntry(j);
+                int btype = block >> 4;
+                int meta = block & 0xF;
+
+                Block b = handleBlock(btype, meta);
+                if (b != null) {
+                    section.setPaletteEntry(j, (b.getId() << 4) | (b.getData() & 0xF));
+                }
+
+                // We already know that is has a handler
+                if (hasBlockEntityHandler) continue;
+
+                MappedLegacyBlockItem settings = replacementData.get(btype);
+                if (settings != null && settings.hasBlockEntityHandler()) {
+                    hasBlockEntityHandler = true;
+                }
+            }
+
+            if (!hasBlockEntityHandler) continue;
+
+            // We need to handle a Block Entity :(
+            for (int x = 0; x < 16; x++) {
+                for (int y = 0; y < 16; y++) {
+                    for (int z = 0; z < 16; z++) {
+                        int block = section.getFlatBlock(x, y, z);
+                        int btype = block >> 4;
+                        int meta = block & 15;
+
+                        MappedLegacyBlockItem settings = replacementData.get(btype);
+                        if (settings == null || !settings.hasBlockEntityHandler()) continue;
+
+                        Pos pos = new Pos(x, (y + (i << 4)), z);
+
+                        // Already handled above
+                        if (tags.containsKey(pos)) continue;
+
+                        CompoundTag tag = new CompoundTag("");
+                        tag.put(new IntTag("x", x + (chunk.getX() << 4)));
+                        tag.put(new IntTag("y", y + (i << 4)));
+                        tag.put(new IntTag("z", z + (chunk.getZ() << 4)));
+
+                        settings.getBlockEntityHandler().handleOrNewCompoundTag(block, tag);
+                        chunk.getBlockEntities().add(tag);
+                    }
+                }
+            }
+        }
+    }
+
+    protected CompoundTag getNamedTag(String text) {
+        CompoundTag tag = new CompoundTag("");
+        tag.put(new CompoundTag("display"));
+        text = ChatColor.RESET + text;
+        ((CompoundTag) tag.get("display")).put(new StringTag("Name", jsonNameFormat ? ChatRewriter.legacyTextToJson(text).toString() : text));
+        return tag;
+    }
+
+    private static final class Pos {
+
+        private final int x;
+        private final short y;
+        private final int z;
+
+        private Pos(int x, int y, int z) {
+            this.x = x;
+            this.y = (short) y;
+            this.z = z;
+        }
+
+        public int getX() {
+            return x;
+        }
+
+        public int getY() {
+            return y;
+        }
+
+        public int getZ() {
+            return z;
+        }
+
+        @Override
+        public boolean equals(Object o) {
+            if (this == o) return true;
+            if (o == null || getClass() != o.getClass()) return false;
+            Pos pos = (Pos) o;
+            if (x != pos.x) return false;
+            if (y != pos.y) return false;
+            return z == pos.z;
+        }
+
+        @Override
+        public int hashCode() {
+            int result = x;
+            result = 31 * result + y;
+            result = 31 * result + z;
+            return result;
+        }
+
+        @Override
+        public String toString() {
+            return "Pos{" + "x=" + x + ", y=" + y + ", z=" + z + '}';
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/LegacyEnchantmentRewriter.java

@@ -0,0 +1,127 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import us.myles.viaversion.libs.opennbt.tag.builtin.*;
+
+import java.util.*;
+
+public class LegacyEnchantmentRewriter {
+
+    private final Map<Short, String> enchantmentMappings = new HashMap<>();
+    private final String nbtTagName;
+    private Set<Short> hideLevelForEnchants;
+
+    public LegacyEnchantmentRewriter(String nbtTagName) {
+        this.nbtTagName = nbtTagName;
+    }
+
+    public void registerEnchantment(int id, String replacementLore) {
+        enchantmentMappings.put((short) id, replacementLore);
+    }
+
+    public void rewriteEnchantmentsToClient(CompoundTag tag, boolean storedEnchant) {
+        String key = storedEnchant ? "StoredEnchantments" : "ench";
+        ListTag enchantments = tag.get(key);
+        ListTag remappedEnchantments = new ListTag(nbtTagName + "|" + key, CompoundTag.class);
+        List<Tag> lore = new ArrayList<>();
+        for (Tag enchantmentEntry : enchantments.clone()) {
+            Short newId = (Short) ((CompoundTag) enchantmentEntry).get("id").getValue();
+            String enchantmentName = enchantmentMappings.get(newId);
+            if (enchantmentName != null) {
+                enchantments.remove(enchantmentEntry);
+                Number level = (Number) ((CompoundTag) enchantmentEntry).get("lvl").getValue();
+                if (hideLevelForEnchants != null && hideLevelForEnchants.contains(newId)) {
+                    lore.add(new StringTag("", enchantmentName));
+                } else {
+                    lore.add(new StringTag("", enchantmentName + " " + EnchantmentRewriter.getRomanNumber(level.shortValue())));
+                }
+                remappedEnchantments.add(enchantmentEntry);
+            }
+        }
+        if (!lore.isEmpty()) {
+            if (!storedEnchant && enchantments.size() == 0) {
+                CompoundTag dummyEnchantment = new CompoundTag("");
+                dummyEnchantment.put(new ShortTag("id", (short) 0));
+                dummyEnchantment.put(new ShortTag("lvl", (short) 0));
+                enchantments.add(dummyEnchantment);
+
+                tag.put(new ByteTag(nbtTagName + "|dummyEnchant"));
+
+                IntTag hideFlags = tag.get("HideFlags");
+                if (hideFlags == null) {
+                    hideFlags = new IntTag("HideFlags");
+                } else {
+                    tag.put(new IntTag(nbtTagName + "|oldHideFlags", hideFlags.getValue()));
+                }
+
+                int flags = hideFlags.getValue() | 1;
+                hideFlags.setValue(flags);
+                tag.put(hideFlags);
+            }
+
+            tag.put(remappedEnchantments);
+
+            CompoundTag display = tag.get("display");
+            if (display == null) {
+                tag.put(display = new CompoundTag("display"));
+            }
+            ListTag loreTag = display.get("Lore");
+            if (loreTag == null) {
+                display.put(loreTag = new ListTag("Lore", StringTag.class));
+            }
+
+            lore.addAll(loreTag.getValue());
+            loreTag.setValue(lore);
+        }
+    }
+
+    public void rewriteEnchantmentsToServer(CompoundTag tag, boolean storedEnchant) {
+        String key = storedEnchant ? "StoredEnchantments" : "ench";
+        ListTag remappedEnchantments = tag.get(nbtTagName + "|" + key);
+        ListTag enchantments = tag.get(key);
+        if (enchantments == null) {
+            enchantments = new ListTag(key, CompoundTag.class);
+        }
+
+        if (!storedEnchant && tag.remove(nbtTagName + "|dummyEnchant") != null) {
+            for (Tag enchantment : enchantments.clone()) {
+                Short id = (Short) ((CompoundTag) enchantment).get("id").getValue();
+                Short level = (Short) ((CompoundTag) enchantment).get("lvl").getValue();
+                if (id == 0 && level == 0) {
+                    enchantments.remove(enchantment);
+                }
+            }
+
+            IntTag hideFlags = tag.remove(nbtTagName + "|oldHideFlags");
+            if (hideFlags != null) {
+                tag.put(new IntTag("HideFlags", hideFlags.getValue()));
+            } else {
+                tag.remove("HideFlags");
+            }
+        }
+
+        CompoundTag display = tag.get("display");
+        // A few null checks just to be safe, though they shouldn't actually be
+        ListTag lore = display != null ? display.get("Lore") : null;
+        for (Tag enchantment : remappedEnchantments.clone()) {
+            enchantments.add(enchantment);
+            if (lore != null && lore.size() != 0) {
+                lore.remove(lore.get(0));
+            }
+        }
+        if (lore != null && lore.size() == 0) {
+            display.remove("Lore");
+            if (display.isEmpty()) {
+                tag.remove("display");
+            }
+        }
+        tag.put(enchantments);
+        tag.remove(remappedEnchantments.getName());
+    }
+
+    public void setHideLevelForEnchants(int... enchants) {
+        this.hideLevelForEnchants = new HashSet<>();
+        for (int enchant : enchants) {
+            hideLevelForEnchants.add((short) enchant);
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/LegacyEntityRewriter.java

@@ -0,0 +1,155 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.storage.EntityData;
+import nl.matsv.viabackwards.api.entities.storage.EntityObjectData;
+import nl.matsv.viabackwards.api.entities.storage.MetaStorage;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.entities.ObjectType;
+import us.myles.ViaVersion.api.minecraft.metadata.MetaType;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_9;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.function.Function;
+
+public abstract class LegacyEntityRewriter<T extends BackwardsProtocol> extends EntityRewriterBase<T> {
+    private final Map<ObjectType, EntityData> objectTypes = new HashMap<>();
+
+    protected LegacyEntityRewriter(T protocol) {
+        this(protocol, MetaType1_9.String, MetaType1_9.Boolean);
+    }
+
+    protected LegacyEntityRewriter(T protocol, MetaType displayType, MetaType displayVisibilityType) {
+        super(protocol, displayType, 2, displayVisibilityType, 3);
+    }
+
+    protected EntityObjectData mapObjectType(ObjectType oldObjectType, ObjectType replacement, int data) {
+        EntityObjectData entData = new EntityObjectData(oldObjectType.getId(), true, replacement.getId(), data);
+        objectTypes.put(oldObjectType, entData);
+        return entData;
+    }
+
+    @Nullable
+    protected EntityData getObjectData(ObjectType type) {
+        return objectTypes.get(type);
+    }
+
+    protected void registerRespawn(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT);
+                handler(wrapper -> {
+                    ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+                    clientWorld.setEnvironment(wrapper.get(Type.INT, 0));
+                });
+            }
+        });
+    }
+
+    protected void registerJoinGame(ClientboundPacketType packetType, EntityType playerType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Entity ID
+                map(Type.UNSIGNED_BYTE); // 1 - Gamemode
+                map(Type.INT); // 2 - Dimension
+                handler(wrapper -> {
+                    ClientWorld clientChunks = wrapper.user().get(ClientWorld.class);
+                    clientChunks.setEnvironment(wrapper.get(Type.INT, 1));
+                    getEntityTracker(wrapper.user()).trackEntityType(wrapper.get(Type.INT, 0), playerType);
+                });
+            }
+        });
+    }
+
+    protected void registerMetadataRewriter(ClientboundPacketType packetType, Type<List<Metadata>> oldMetaType, Type<List<Metadata>> newMetaType) {
+        getProtocol().registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                if (oldMetaType != null) {
+                    map(oldMetaType, newMetaType);
+                } else {
+                    map(newMetaType);
+                }
+                handler(wrapper -> {
+                    List<Metadata> metadata = wrapper.get(newMetaType, 0);
+                    wrapper.set(newMetaType, 0,
+                            handleMeta(wrapper.user(), wrapper.get(Type.VAR_INT, 0), new MetaStorage(metadata)).getMetaDataList());
+                });
+            }
+        });
+    }
+
+    protected void registerMetadataRewriter(ClientboundPacketType packetType, Type<List<Metadata>> metaType) {
+        registerMetadataRewriter(packetType, null, metaType);
+    }
+
+    protected PacketHandler getMobSpawnRewriter(Type<List<Metadata>> metaType) {
+        return wrapper -> {
+            int entityId = wrapper.get(Type.VAR_INT, 0);
+            EntityType type = getEntityType(wrapper.user(), entityId);
+
+            MetaStorage storage = new MetaStorage(wrapper.get(metaType, 0));
+            handleMeta(wrapper.user(), entityId, storage);
+
+            EntityData entityData = getEntityData(type);
+            if (entityData != null) {
+                wrapper.set(Type.VAR_INT, 1, entityData.getReplacementId());
+                if (entityData.hasBaseMeta()) {
+                    entityData.getDefaultMeta().createMeta(storage);
+                }
+            }
+
+            // Rewrite Metadata
+            wrapper.set(metaType, 0, storage.getMetaDataList());
+        };
+    }
+
+    protected PacketHandler getObjectTrackerHandler() {
+        return wrapper -> addTrackedEntity(wrapper, wrapper.get(Type.VAR_INT, 0), getObjectTypeFromId(wrapper.get(Type.BYTE, 0)));
+    }
+
+    protected PacketHandler getTrackerAndMetaHandler(Type<List<Metadata>> metaType, EntityType entityType) {
+        return wrapper -> {
+            addTrackedEntity(wrapper, wrapper.get(Type.VAR_INT, 0), entityType);
+
+            List<Metadata> metaDataList = handleMeta(wrapper.user(), wrapper.get(Type.VAR_INT, 0),
+                    new MetaStorage(wrapper.get(metaType, 0))).getMetaDataList();
+            wrapper.set(metaType, 0, metaDataList);
+        };
+    }
+
+    protected PacketHandler getObjectRewriter(Function<Byte, ObjectType> objectGetter) {
+        return wrapper -> {
+            ObjectType type = objectGetter.apply(wrapper.get(Type.BYTE, 0));
+            if (type == null) {
+                ViaBackwards.getPlatform().getLogger().warning("Could not find Entity Type" + wrapper.get(Type.BYTE, 0));
+                return;
+            }
+
+            EntityData data = getObjectData(type);
+            if (data != null) {
+                wrapper.set(Type.BYTE, 0, (byte) data.getReplacementId());
+                if (data.getObjectData() != -1) {
+                    wrapper.set(Type.INT, 0, data.getObjectData());
+                }
+            }
+        };
+    }
+
+    protected EntityType getObjectTypeFromId(int typeId) {
+        return getTypeFromId(typeId);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/LegacySoundRewriter.java

@@ -0,0 +1,96 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+
+public abstract class LegacySoundRewriter<T extends BackwardsProtocol> extends Rewriter<T> {
+    protected final Int2ObjectMap<SoundData> soundRewrites = new Int2ObjectOpenHashMap<>(64);
+
+    protected LegacySoundRewriter(T protocol) {
+        super(protocol);
+    }
+
+    public SoundData added(int id, int replacement) {
+        return added(id, replacement, -1);
+    }
+
+    public SoundData added(int id, int replacement, float newPitch) {
+        SoundData data = new SoundData(replacement, true, newPitch, true);
+        soundRewrites.put(id, data);
+        return data;
+    }
+
+    public SoundData removed(int id) {
+        SoundData data = new SoundData(-1, false, -1, false);
+        soundRewrites.put(id, data);
+        return data;
+    }
+
+    public int handleSounds(int soundId) {
+        int newSoundId = soundId;
+        SoundData data = soundRewrites.get(soundId);
+        if (data != null) return data.getReplacementSound();
+
+        for (Int2ObjectMap.Entry<SoundData> entry : soundRewrites.int2ObjectEntrySet()) {
+            if (soundId > entry.getIntKey()) {
+                if (entry.getValue().isAdded()) {
+                    newSoundId--;
+                } else {
+                    newSoundId++;
+                }
+            }
+        }
+        return newSoundId;
+    }
+
+    public boolean hasPitch(int soundId) {
+        SoundData data = soundRewrites.get(soundId);
+        return data != null && data.isChangePitch();
+    }
+
+    public float handlePitch(int soundId) {
+        SoundData data = soundRewrites.get(soundId);
+        return data != null ? data.getNewPitch() : 1F;
+    }
+
+    public static final class SoundData {
+        private final int replacementSound;
+        private final boolean changePitch;
+        private final float newPitch;
+        private final boolean added;
+
+        public SoundData(int replacementSound, boolean changePitch, float newPitch, boolean added) {
+            this.replacementSound = replacementSound;
+            this.changePitch = changePitch;
+            this.newPitch = newPitch;
+            this.added = added;
+        }
+
+        public int getReplacementSound() {
+            return replacementSound;
+        }
+
+        public boolean isChangePitch() {
+            return changePitch;
+        }
+
+        public float getNewPitch() {
+            return newPitch;
+        }
+
+        public boolean isAdded() {
+            return added;
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/Rewriter.java

@@ -0,0 +1,44 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+
+public abstract class Rewriter<T extends BackwardsProtocol> {
+    protected final T protocol;
+
+    protected Rewriter(final T protocol) {
+        this.protocol = protocol;
+    }
+
+    /**
+     * Register everything.
+     */
+    public void register() {
+        registerPackets();
+        registerRewrites();
+    }
+
+    /**
+     * Register packet listeners.
+     */
+    protected abstract void registerPackets();
+
+    /**
+     * Register rewrites.
+     */
+    protected void registerRewrites() {
+    }
+
+    public T getProtocol() {
+        return protocol;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/SoundRewriter.java

@@ -0,0 +1,66 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+
+public class SoundRewriter extends us.myles.ViaVersion.api.rewriters.SoundRewriter {
+
+    private final BackwardsProtocol protocol;
+
+    public SoundRewriter(BackwardsProtocol protocol) {
+        super(protocol);
+        this.protocol = protocol;
+    }
+
+    public void registerNamedSound(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // Sound identifier
+                handler(wrapper -> {
+                    String soundId = wrapper.get(Type.STRING, 0);
+                    String mappedId = protocol.getMappingData().getMappedNamedSound(soundId);
+                    if (mappedId == null) return;
+                    if (!mappedId.isEmpty()) {
+                        wrapper.set(Type.STRING, 0, mappedId);
+                    } else {
+                        wrapper.cancel();
+                    }
+                });
+            }
+        });
+    }
+
+    public void registerStopSound(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    byte flags = wrapper.passthrough(Type.BYTE);
+                    if ((flags & 0x02) == 0) return; // No sound specified
+
+                    if ((flags & 0x01) != 0) {
+                        wrapper.passthrough(Type.VAR_INT); // Source
+                    }
+
+                    String soundId = wrapper.read(Type.STRING);
+                    String mappedId = protocol.getMappingData().getMappedNamedSound(soundId);
+                    if (mappedId == null) {
+                        // No mapping found
+                        wrapper.write(Type.STRING, soundId);
+                        return;
+                    }
+
+                    if (!mappedId.isEmpty()) {
+                        wrapper.write(Type.STRING, mappedId);
+                    } else {
+                        // Cancel if set to empty
+                        wrapper.cancel();
+                    }
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/api/rewriters/TranslatableRewriter.java

@@ -0,0 +1,116 @@
+package nl.matsv.viabackwards.api.rewriters;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.data.VBMappingDataLoader;
+import us.myles.ViaVersion.api.protocol.ClientboundPacketType;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.rewriters.ComponentRewriter;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.packets.State;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class TranslatableRewriter extends ComponentRewriter {
+
+    private static final Map<String, Map<String, String>> TRANSLATABLES = new HashMap<>();
+    protected final Map<String, String> newTranslatables;
+
+    public static void loadTranslatables() {
+        JsonObject jsonObject = VBMappingDataLoader.loadData("translation-mappings.json");
+        for (Map.Entry<String, JsonElement> entry : jsonObject.entrySet()) {
+            Map<String, String> versionMappings = new HashMap<>();
+            TRANSLATABLES.put(entry.getKey(), versionMappings);
+            for (Map.Entry<String, JsonElement> translationEntry : entry.getValue().getAsJsonObject().entrySet()) {
+                versionMappings.put(translationEntry.getKey(), translationEntry.getValue().getAsString());
+            }
+        }
+    }
+
+    public TranslatableRewriter(BackwardsProtocol protocol) {
+        this(protocol, protocol.getClass().getSimpleName().split("To")[1].replace("_", "."));
+    }
+
+    public TranslatableRewriter(BackwardsProtocol protocol, String sectionIdentifier) {
+        super(protocol);
+        final Map<String, String> newTranslatables = TRANSLATABLES.get(sectionIdentifier);
+        if (newTranslatables == null) {
+            ViaBackwards.getPlatform().getLogger().warning("Error loading " + sectionIdentifier + " translatables!");
+            this.newTranslatables = new HashMap<>();
+        } else {
+            this.newTranslatables = newTranslatables;
+        }
+    }
+
+    public void registerPing() {
+        protocol.registerOutgoing(State.LOGIN, 0x00, 0x00, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> processText(wrapper.passthrough(Type.COMPONENT)));
+            }
+        });
+    }
+
+    public void registerDisconnect(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> processText(wrapper.passthrough(Type.COMPONENT)));
+            }
+        });
+    }
+
+    public void registerChatMessage(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> processText(wrapper.passthrough(Type.COMPONENT)));
+            }
+        });
+    }
+
+    public void registerLegacyOpenWindow(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // Id
+                map(Type.STRING); // Window Type
+                handler(wrapper -> processText(wrapper.passthrough(Type.COMPONENT)));
+            }
+        });
+    }
+
+    public void registerOpenWindow(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // Id
+                map(Type.VAR_INT); // Window Type
+                handler(wrapper -> processText(wrapper.passthrough(Type.COMPONENT)));
+            }
+        });
+    }
+
+    public void registerTabList(ClientboundPacketType packetType) {
+        protocol.registerOutgoing(packetType, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    processText(wrapper.passthrough(Type.COMPONENT));
+                    processText(wrapper.passthrough(Type.COMPONENT));
+                });
+            }
+        });
+    }
+
+    @Override
+    protected void handleTranslate(JsonObject root, String translate) {
+        String newTranslate = newTranslatables.get(translate);
+        if (newTranslate != null) {
+            root.addProperty("translate", newTranslate);
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/PotionSplashHandler.java

@@ -0,0 +1,31 @@
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11;
+
+import us.myles.viaversion.libs.fastutil.ints.Int2IntMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
+
+public class PotionSplashHandler {
+
+    private static final Int2IntMap DATA = new Int2IntOpenHashMap(14, 1F);
+
+    static {
+        DATA.defaultReturnValue(-1);
+        DATA.put(2039713, 5); // night vision
+        DATA.put(8356754, 7); // invisibility
+        DATA.put(2293580, 9); // jump boost
+        DATA.put(14981690, 12); // fire resistance
+        DATA.put(8171462, 14); // swiftness
+        DATA.put(5926017, 17); // slowness
+        DATA.put(3035801, 19); // water breathing
+        DATA.put(16262179, 21); // instant health
+        DATA.put(4393481, 23); // instant damage
+        DATA.put(5149489, 25); // poison
+        DATA.put(13458603, 28); // regeneration
+        DATA.put(9643043, 31); // strength
+        DATA.put(4738376, 34); // weakness
+        DATA.put(3381504, 36); // luck
+    }
+
+    public static int getOldData(int data) {
+        return DATA.get(data);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/Protocol1_10To1_11.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets.BlockItemPackets1_11;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets.EntityPackets1_11;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets.PlayerPackets1_11;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets.SoundPackets1_11;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.storage.WindowTracker;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+
+public class Protocol1_10To1_11 extends BackwardsProtocol<ClientboundPackets1_9_3, ClientboundPackets1_9_3, ServerboundPackets1_9_3, ServerboundPackets1_9_3> {
+
+    private EntityPackets1_11 entityPackets; // Required for the item rewriter
+    private BlockItemPackets1_11 blockItemPackets;
+
+    public Protocol1_10To1_11() {
+        super(ClientboundPackets1_9_3.class, ClientboundPackets1_9_3.class, ServerboundPackets1_9_3.class, ServerboundPackets1_9_3.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        (entityPackets = new EntityPackets1_11(this)).register();
+        new PlayerPackets1_11().register(this);
+        (blockItemPackets = new BlockItemPackets1_11(this)).register();
+        new SoundPackets1_11(this).register();
+    }
+
+    @Override
+    public void init(UserConnection user) {
+        // Register ClientWorld
+        if (!user.has(ClientWorld.class)) {
+            user.put(new ClientWorld(user));
+        }
+
+        // Register EntityTracker if it doesn't exist yet.
+        if (!user.has(EntityTracker.class)) {
+            user.put(new EntityTracker(user));
+        }
+
+        if (!user.has(WindowTracker.class)) {
+            user.put(new WindowTracker(user));
+        }
+
+        // Init protocol in EntityTracker
+        user.get(EntityTracker.class).initProtocol(this);
+    }
+
+    public EntityPackets1_11 getEntityPackets() {
+        return entityPackets;
+    }
+
+    public BlockItemPackets1_11 getBlockItemPackets() {
+        return blockItemPackets;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/packets/BlockItemPackets1_11.java

@@ -0,0 +1,457 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets;
+
+import net.md_5.bungee.api.ChatColor;
+import nl.matsv.viabackwards.api.data.MappedLegacyBlockItem;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.api.rewriters.LegacyBlockItemRewriter;
+import nl.matsv.viabackwards.api.rewriters.LegacyEnchantmentRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.Protocol1_10To1_11;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.storage.ChestedHorseStorage;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.storage.WindowTracker;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.entities.Entity1_11Types;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
+import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.rewriters.ItemRewriter;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_11to1_10.EntityIdRewriter;
+import us.myles.ViaVersion.protocols.protocol1_9_1_2to1_9_3_4.types.Chunk1_9_3_4Type;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ListTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+import java.util.Arrays;
+import java.util.Optional;
+
+public class BlockItemPackets1_11 extends LegacyBlockItemRewriter<Protocol1_10To1_11> {
+
+    private LegacyEnchantmentRewriter enchantmentRewriter;
+
+    public BlockItemPackets1_11(Protocol1_10To1_11 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        ItemRewriter itemRewriter = new ItemRewriter(protocol, this::handleItemToClient, this::handleItemToServer);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SET_SLOT, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot ID
+                map(Type.ITEM); // 2 - Slot Value
+
+                handler(itemRewriter.itemToClientHandler(Type.ITEM));
+
+                // Handle Llama
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (isLlama(wrapper.user())) {
+                            Optional<ChestedHorseStorage> horse = getChestedHorse(wrapper.user());
+                            if (!horse.isPresent())
+                                return;
+                            ChestedHorseStorage storage = horse.get();
+                            int currentSlot = wrapper.get(Type.SHORT, 0);
+                            wrapper.set(Type.SHORT, 0, ((Integer) (currentSlot = getNewSlotId(storage, currentSlot))).shortValue());
+                            wrapper.set(Type.ITEM, 0, getNewItem(storage, currentSlot, wrapper.get(Type.ITEM, 0)));
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.WINDOW_ITEMS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.ITEM_ARRAY); // 1 - Window Values
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        Item[] stacks = wrapper.get(Type.ITEM_ARRAY, 0);
+                        for (int i = 0; i < stacks.length; i++)
+                            stacks[i] = handleItemToClient(stacks[i]);
+
+                        if (isLlama(wrapper.user())) {
+                            Optional<ChestedHorseStorage> horse = getChestedHorse(wrapper.user());
+                            if (!horse.isPresent())
+                                return;
+                            ChestedHorseStorage storage = horse.get();
+                            stacks = Arrays.copyOf(stacks, !storage.isChested() ? 38 : 53);
+
+                            for (int i = stacks.length - 1; i >= 0; i--) {
+                                stacks[getNewSlotId(storage, i)] = stacks[i];
+                                stacks[i] = getNewItem(storage, i, stacks[i]);
+                            }
+                            wrapper.set(Type.ITEM_ARRAY, 0, stacks);
+                        }
+                    }
+                });
+            }
+        });
+
+        itemRewriter.registerEntityEquipment(ClientboundPackets1_9_3.ENTITY_EQUIPMENT, Type.ITEM);
+
+        // Plugin message Packet -> Trading
+        protocol.registerOutgoing(ClientboundPackets1_9_3.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // 0 - Channel
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (wrapper.get(Type.STRING, 0).equalsIgnoreCase("MC|TrList")) {
+                            wrapper.passthrough(Type.INT); // Passthrough Window ID
+
+                            int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                            for (int i = 0; i < size; i++) {
+                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Input Item
+                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Output Item
+
+                                boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
+                                if (secondItem) {
+                                    wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Second Item
+                                }
+
+                                wrapper.passthrough(Type.BOOLEAN); // Trade disabled
+                                wrapper.passthrough(Type.INT); // Number of tools uses
+                                wrapper.passthrough(Type.INT); // Maximum number of trade uses
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_9_3.CLICK_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot
+                map(Type.BYTE); // 2 - Button
+                map(Type.SHORT); // 3 - Action number
+                map(Type.VAR_INT); // 4 - Mode
+                map(Type.ITEM); // 5 - Clicked Item
+
+                handler(itemRewriter.itemToServerHandler(Type.ITEM));
+
+                // Llama slot
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (isLlama(wrapper.user())) {
+                            Optional<ChestedHorseStorage> horse = getChestedHorse(wrapper.user());
+                            if (!horse.isPresent())
+                                return;
+                            ChestedHorseStorage storage = horse.get();
+                            int clickSlot = wrapper.get(Type.SHORT, 0);
+                            int correctSlot = getOldSlotId(storage, clickSlot);
+
+                            wrapper.set(Type.SHORT, 0, ((Integer) correctSlot).shortValue());
+                        }
+                    }
+                });
+            }
+        });
+
+        itemRewriter.registerCreativeInvAction(ServerboundPackets1_9_3.CREATIVE_INVENTORY_ACTION, Type.ITEM);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.CHUNK_DATA, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+
+                        Chunk1_9_3_4Type type = new Chunk1_9_3_4Type(clientWorld); // Use the 1.10 Chunk type since nothing changed.
+                        Chunk chunk = wrapper.passthrough(type);
+
+                        handleChunk(chunk);
+
+                        // only patch it for signs for now
+                        for (CompoundTag tag : chunk.getBlockEntities()) {
+                            Tag idTag = tag.get("id");
+                            if (!(idTag instanceof StringTag)) continue;
+
+                            String id = (String) idTag.getValue();
+                            if (id.equals("minecraft:sign")) {
+                                ((StringTag) idTag).setValue("Sign");
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.BLOCK_CHANGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION); // 0 - Block Position
+                map(Type.VAR_INT); // 1 - Block
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int idx = wrapper.get(Type.VAR_INT, 0);
+                        wrapper.set(Type.VAR_INT, 0, handleBlockID(idx));
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.MULTI_BLOCK_CHANGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Chunk X
+                map(Type.INT); // 1 - Chunk Z
+                map(Type.BLOCK_CHANGE_RECORD_ARRAY);
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        for (BlockChangeRecord record : wrapper.get(Type.BLOCK_CHANGE_RECORD_ARRAY, 0)) {
+                            record.setBlockId(handleBlockID(record.getBlockId()));
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.BLOCK_ENTITY_DATA, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION); // 0 - Position
+                map(Type.UNSIGNED_BYTE); // 1 - Action
+                map(Type.NBT); // 2 - NBT
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        // Remove on shulkerbox decleration
+                        if (wrapper.get(Type.UNSIGNED_BYTE, 0) == 10) {
+                            wrapper.cancel();
+                        }
+                        // Handler Spawners
+                        if (wrapper.get(Type.UNSIGNED_BYTE, 0) == 1) {
+                            CompoundTag tag = wrapper.get(Type.NBT, 0);
+                            EntityIdRewriter.toClientSpawner(tag, true);
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.OPEN_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.STRING); // 1 - Window Type
+                map(Type.COMPONENT); // 2 - Title
+                map(Type.UNSIGNED_BYTE); // 3 - Slots
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int entityId = -1;
+                        // Passthrough Entity ID
+                        if (wrapper.get(Type.STRING, 0).equals("EntityHorse")) {
+                            entityId = wrapper.passthrough(Type.INT);
+                        }
+
+                        // Track Inventory
+                        String inventory = wrapper.get(Type.STRING, 0);
+                        WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);
+                        windowTracker.setInventory(inventory);
+                        windowTracker.setEntityId(entityId);
+
+                        // Change llama slotcount to the donkey one
+                        if (isLlama(wrapper.user())) {
+                            wrapper.set(Type.UNSIGNED_BYTE, 1, (short) 17);
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.CLOSE_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                // Inventory tracking
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);
+                        windowTracker.setInventory(null);
+                        windowTracker.setEntityId(-1);
+                    }
+                });
+            }
+        });
+
+
+        protocol.registerIncoming(ServerboundPackets1_9_3.CLOSE_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                // Inventory tracking
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        WindowTracker windowTracker = wrapper.user().get(WindowTracker.class);
+                        windowTracker.setInventory(null);
+                        windowTracker.setEntityId(-1);
+                    }
+                });
+            }
+        });
+
+        protocol.getEntityPackets().registerMetaHandler().handle(e -> {
+            Metadata data = e.getData();
+
+            if (data.getMetaType().getType().equals(Type.ITEM)) // Is Item
+                data.setValue(handleItemToClient((Item) data.getValue()));
+
+            return data;
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        // Handle spawner block entity (map to itself with custom handler)
+        MappedLegacyBlockItem data = replacementData.computeIfAbsent(52, s -> new MappedLegacyBlockItem(52, (short) -1, null, false));
+        data.setBlockEntityHandler((b, tag) -> {
+            EntityIdRewriter.toClientSpawner(tag, true);
+            return tag;
+        });
+
+        enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName);
+        enchantmentRewriter.registerEnchantment(71, "§cCurse of Vanishing");
+        enchantmentRewriter.registerEnchantment(10, "§cCurse of Binding");
+
+        enchantmentRewriter.setHideLevelForEnchants(71, 10); // Curses do not display their level
+    }
+
+    @Override
+    public Item handleItemToClient(Item item) {
+        if (item == null) return null;
+        super.handleItemToClient(item);
+
+        CompoundTag tag = item.getTag();
+        if (tag == null) return item;
+
+        // Rewrite spawn eggs (id checks are done in the method itself)
+        EntityIdRewriter.toClientItem(item, true);
+
+        if (tag.get("ench") instanceof ListTag) {
+            enchantmentRewriter.rewriteEnchantmentsToClient(tag, false);
+        }
+        if (tag.get("StoredEnchantments") instanceof ListTag) {
+            enchantmentRewriter.rewriteEnchantmentsToClient(tag, true);
+        }
+        return item;
+    }
+
+    @Override
+    public Item handleItemToServer(final Item item) {
+        if (item == null) return null;
+        super.handleItemToServer(item);
+
+        CompoundTag tag = item.getTag();
+        if (tag == null) return item;
+
+        // Rewrite spawn eggs (id checks are done in the method itself)
+        EntityIdRewriter.toServerItem(item, true);
+
+        if (tag.contains(nbtTagName + "|ench")) {
+            enchantmentRewriter.rewriteEnchantmentsToServer(tag, false);
+        }
+        if (tag.contains(nbtTagName + "|StoredEnchantments")) {
+            enchantmentRewriter.rewriteEnchantmentsToServer(tag, true);
+        }
+        return item;
+    }
+
+    private boolean isLlama(UserConnection user) {
+        WindowTracker tracker = user.get(WindowTracker.class);
+        if (tracker.getInventory() != null && tracker.getInventory().equals("EntityHorse")) {
+            EntityTracker.ProtocolEntityTracker entTracker = user.get(EntityTracker.class).get(getProtocol());
+            EntityTracker.StoredEntity storedEntity = entTracker.getEntity(tracker.getEntityId());
+            return storedEntity != null && storedEntity.getType().is(Entity1_11Types.EntityType.LIAMA);
+        }
+        return false;
+    }
+
+    private Optional<ChestedHorseStorage> getChestedHorse(UserConnection user) {
+        WindowTracker tracker = user.get(WindowTracker.class);
+        if (tracker.getInventory() != null && tracker.getInventory().equals("EntityHorse")) {
+            EntityTracker.ProtocolEntityTracker entTracker = user.get(EntityTracker.class).get(getProtocol());
+            EntityTracker.StoredEntity storedEntity = entTracker.getEntity(tracker.getEntityId());
+            if (storedEntity != null)
+                return Optional.of(storedEntity.get(ChestedHorseStorage.class));
+        }
+        return Optional.empty();
+    }
+
+    private int getNewSlotId(ChestedHorseStorage storage, int slotId) {
+        int totalSlots = !storage.isChested() ? 38 : 53;
+        int strength = storage.isChested() ? storage.getLiamaStrength() : 0;
+        int startNonExistingFormula = 2 + 3 * strength;
+        int offsetForm = 15 - (3 * strength);
+
+        if (slotId >= startNonExistingFormula && totalSlots > (slotId + offsetForm))
+            return offsetForm + slotId;
+        if (slotId == 1)
+            return 0;
+        return slotId;
+    }
+
+    private int getOldSlotId(ChestedHorseStorage storage, int slotId) {
+        int strength = storage.isChested() ? storage.getLiamaStrength() : 0;
+        int startNonExistingFormula = 2 + 3 * strength;
+        int endNonExistingFormula = 2 + 3 * (storage.isChested() ? 5 : 0);
+        int offsetForm = endNonExistingFormula - startNonExistingFormula;
+
+        if (slotId == 1 || slotId >= startNonExistingFormula && slotId < endNonExistingFormula)
+            return 0;
+        if (slotId >= endNonExistingFormula)
+            return slotId - offsetForm;
+        if (slotId == 0)
+            return 1;
+        return slotId;
+    }
+
+    private Item getNewItem(ChestedHorseStorage storage, int slotId, Item current) {
+        int strength = storage.isChested() ? storage.getLiamaStrength() : 0;
+        int startNonExistingFormula = 2 + 3 * strength;
+        int endNonExistingFormula = 2 + 3 * (storage.isChested() ? 5 : 0);
+
+        if (slotId >= startNonExistingFormula && slotId < endNonExistingFormula)
+            return new Item(166, (byte) 1, (short) 0, getNamedTag(ChatColor.RED + "SLOT DISABLED"));
+        if (slotId == 1)
+            return null;
+        return current;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/packets/EntityPackets1_11.java

@@ -0,0 +1,423 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets;
+
+import nl.matsv.viabackwards.api.entities.storage.EntityData;
+import nl.matsv.viabackwards.api.entities.storage.MetaStorage;
+import nl.matsv.viabackwards.api.exceptions.RemovedValueException;
+import nl.matsv.viabackwards.api.rewriters.LegacyEntityRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.PotionSplashHandler;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.Protocol1_10To1_11;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.storage.ChestedHorseStorage;
+import nl.matsv.viabackwards.utils.Block;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.entities.Entity1_11Types;
+import us.myles.ViaVersion.api.entities.Entity1_12Types;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_9;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.version.Types1_9;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+
+import java.util.Optional;
+
+public class EntityPackets1_11 extends LegacyEntityRewriter<Protocol1_10To1_11> {
+
+    public EntityPackets1_11(Protocol1_10To1_11 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_9_3.EFFECT, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT);
+                map(Type.POSITION);
+                map(Type.INT);
+                handler(wrapper -> {
+                    int type = wrapper.get(Type.INT, 0);
+                    if (type == 2002 || type == 2007) {
+                        // 2007 potion id doesn't exist in 1.10
+                        if (type == 2007) {
+                            wrapper.set(Type.INT, 0, 2002);
+                        }
+
+                        int mappedData = PotionSplashHandler.getOldData(wrapper.get(Type.INT, 1));
+                        if (mappedData != -1) {
+                            wrapper.set(Type.INT, 1, mappedData);
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SPAWN_ENTITY, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - UUID
+                map(Type.BYTE); // 2 - Type
+                map(Type.DOUBLE); // 3 - x
+                map(Type.DOUBLE); // 4 - y
+                map(Type.DOUBLE); // 5 - z
+                map(Type.BYTE); // 6 - Pitch
+                map(Type.BYTE); // 7 - Yaw
+                map(Type.INT); // 8 - data
+
+                // Track Entity
+                handler(getObjectTrackerHandler());
+                handler(getObjectRewriter(id -> Entity1_11Types.ObjectType.findById(id).orElse(null)));
+
+                // Handle FallingBlock blocks
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        Optional<Entity1_12Types.ObjectType> type = Entity1_12Types.ObjectType.findById(wrapper.get(Type.BYTE, 0));
+                        if (type.isPresent() && type.get() == Entity1_12Types.ObjectType.FALLING_BLOCK) {
+                            int objectData = wrapper.get(Type.INT, 0);
+                            int objType = objectData & 4095;
+                            int data = objectData >> 12 & 15;
+
+                            Block block = getProtocol().getBlockItemPackets().handleBlock(objType, data);
+                            if (block == null)
+                                return;
+
+                            wrapper.set(Type.INT, 0, block.getId() | block.getData() << 12);
+                        }
+                    }
+                });
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_9_3.SPAWN_EXPERIENCE_ORB, Entity1_11Types.EntityType.EXPERIENCE_ORB);
+        registerExtraTracker(ClientboundPackets1_9_3.SPAWN_GLOBAL_ENTITY, Entity1_11Types.EntityType.WEATHER);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SPAWN_MOB, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - UUID
+                map(Type.VAR_INT, Type.UNSIGNED_BYTE); // 2 - Entity Type
+                map(Type.DOUBLE); // 3 - X
+                map(Type.DOUBLE); // 4 - Y
+                map(Type.DOUBLE); // 5 - Z
+                map(Type.BYTE); // 6 - Yaw
+                map(Type.BYTE); // 7 - Pitch
+                map(Type.BYTE); // 8 - Head Pitch
+                map(Type.SHORT); // 9 - Velocity X
+                map(Type.SHORT); // 10 - Velocity Y
+                map(Type.SHORT); // 11 - Velocity Z
+                map(Types1_9.METADATA_LIST); // 12 - Metadata
+
+                // Track entity
+                handler(getTrackerHandler(Type.UNSIGNED_BYTE, 0));
+
+                // Rewrite entity type / metadata
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int entityId = wrapper.get(Type.VAR_INT, 0);
+                        EntityType type = getEntityType(wrapper.user(), entityId);
+
+                        MetaStorage storage = new MetaStorage(wrapper.get(Types1_9.METADATA_LIST, 0));
+                        handleMeta(
+                                wrapper.user(),
+                                wrapper.get(Type.VAR_INT, 0),
+                                storage
+                        );
+
+                        EntityData entityData = getEntityData(type);
+                        if (entityData != null) {
+                            wrapper.set(Type.UNSIGNED_BYTE, 0, (short) entityData.getReplacementId());
+                            if (entityData.hasBaseMeta()) {
+                                entityData.getDefaultMeta().createMeta(storage);
+                            }
+                        }
+
+                        // Rewrite Metadata
+                        wrapper.set(
+                                Types1_9.METADATA_LIST,
+                                0,
+                                storage.getMetaDataList()
+                        );
+                    }
+                });
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_9_3.SPAWN_PAINTING, Entity1_11Types.EntityType.PAINTING);
+        registerJoinGame(ClientboundPackets1_9_3.JOIN_GAME, Entity1_11Types.EntityType.PLAYER);
+        registerRespawn(ClientboundPackets1_9_3.RESPAWN);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SPAWN_PLAYER, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.UUID); // 1 - Player UUID
+                map(Type.DOUBLE); // 2 - X
+                map(Type.DOUBLE); // 3 - Y
+                map(Type.DOUBLE); // 4 - Z
+                map(Type.BYTE); // 5 - Yaw
+                map(Type.BYTE); // 6 - Pitch
+                map(Types1_9.METADATA_LIST); // 7 - Metadata list
+
+                handler(getTrackerAndMetaHandler(Types1_9.METADATA_LIST, Entity1_11Types.EntityType.PLAYER));
+            }
+        });
+
+        registerEntityDestroy(ClientboundPackets1_9_3.DESTROY_ENTITIES);
+        registerMetadataRewriter(ClientboundPackets1_9_3.ENTITY_METADATA, Types1_9.METADATA_LIST);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.ENTITY_STATUS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Entity ID
+                map(Type.BYTE); // 1 - Entity Status
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        byte b = wrapper.get(Type.BYTE, 0);
+
+                        if (b == 35) {
+                            wrapper.clearPacket();
+                            wrapper.setId(0x1E); // Change Game State
+                            wrapper.write(Type.UNSIGNED_BYTE, (short) 10); // Play Elder Guardian animation
+                            wrapper.write(Type.FLOAT, 0F);
+                        }
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        // Guardian
+        mapEntity(Entity1_11Types.EntityType.ELDER_GUARDIAN, Entity1_11Types.EntityType.GUARDIAN);
+        // Skeletons
+        mapEntity(Entity1_11Types.EntityType.WITHER_SKELETON, Entity1_11Types.EntityType.SKELETON).mobName("Wither Skeleton").spawnMetadata(storage -> storage.add(getSkeletonTypeMeta(1)));
+        mapEntity(Entity1_11Types.EntityType.STRAY, Entity1_11Types.EntityType.SKELETON).mobName("Stray").spawnMetadata(storage -> storage.add(getSkeletonTypeMeta(2)));
+        // Zombies
+        mapEntity(Entity1_11Types.EntityType.HUSK, Entity1_11Types.EntityType.ZOMBIE).mobName("Husk").spawnMetadata(storage -> handleZombieType(storage, 6));
+        mapEntity(Entity1_11Types.EntityType.ZOMBIE_VILLAGER, Entity1_11Types.EntityType.ZOMBIE).spawnMetadata(storage -> handleZombieType(storage, 1));
+        // Horses
+        mapEntity(Entity1_11Types.EntityType.HORSE, Entity1_11Types.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(0))); // Nob able to ride the horse without having the MetaType sent.
+        mapEntity(Entity1_11Types.EntityType.DONKEY, Entity1_11Types.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(1)));
+        mapEntity(Entity1_11Types.EntityType.MULE, Entity1_11Types.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(2)));
+        mapEntity(Entity1_11Types.EntityType.SKELETON_HORSE, Entity1_11Types.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(4)));
+        mapEntity(Entity1_11Types.EntityType.ZOMBIE_HORSE, Entity1_11Types.EntityType.HORSE).spawnMetadata(storage -> storage.add(getHorseMetaType(3)));
+        // New mobs
+        mapEntity(Entity1_11Types.EntityType.EVOCATION_FANGS, Entity1_11Types.EntityType.SHULKER);
+        mapEntity(Entity1_11Types.EntityType.EVOCATION_ILLAGER, Entity1_11Types.EntityType.VILLAGER).mobName("Evoker");
+        mapEntity(Entity1_11Types.EntityType.VEX, Entity1_11Types.EntityType.BAT).mobName("Vex");
+        mapEntity(Entity1_11Types.EntityType.VINDICATION_ILLAGER, Entity1_11Types.EntityType.VILLAGER).mobName("Vindicator").spawnMetadata(storage -> storage.add(new Metadata(13, MetaType1_9.VarInt, 4))); // Base Profession
+        mapEntity(Entity1_11Types.EntityType.LIAMA, Entity1_11Types.EntityType.HORSE).mobName("Llama").spawnMetadata(storage -> storage.add(getHorseMetaType(1)));
+        mapEntity(Entity1_11Types.EntityType.LIAMA_SPIT, Entity1_11Types.EntityType.SNOWBALL);
+
+        mapObjectType(Entity1_11Types.ObjectType.LIAMA_SPIT, Entity1_11Types.ObjectType.SNOWBALL, -1);
+        // Replace with endertorchthingies
+        mapObjectType(Entity1_11Types.ObjectType.EVOCATION_FANGS, Entity1_11Types.ObjectType.FALLING_BLOCK, 198 | 1 << 12);
+
+        // Handle ElderGuardian & target metadata
+        registerMetaHandler().filter(Entity1_11Types.EntityType.GUARDIAN, true, 12).handle(e -> {
+            Metadata data = e.getData();
+
+            boolean b = (boolean) data.getValue();
+            int bitmask = b ? 0x02 : 0;
+
+            if (e.getEntity().getType().is(Entity1_11Types.EntityType.ELDER_GUARDIAN))
+                bitmask |= 0x04;
+
+            data.setMetaType(MetaType1_9.Byte);
+            data.setValue((byte) bitmask);
+
+            return data;
+        });
+
+        // Handle skeleton swing
+        registerMetaHandler().filter(Entity1_11Types.EntityType.ABSTRACT_SKELETON, true, 12).handleIndexChange(13);
+
+        /*
+            ZOMBIE CHANGES
+         */
+        registerMetaHandler().filter(Entity1_11Types.EntityType.ZOMBIE, true).handle(e -> {
+            Metadata data = e.getData();
+
+            switch (data.getId()) {
+                case 13:
+                    throw RemovedValueException.EX;
+                case 14:
+                    data.setId(15);
+                    break;
+                case 15:
+                    data.setId(14);
+                    break;
+                // Profession
+                case 16:
+                    data.setId(13);
+                    data.setValue(1 + (int) data.getValue());
+                    break;
+            }
+
+            return data;
+        });
+
+        // Handle Evocation Illager
+        registerMetaHandler().filter(Entity1_11Types.EntityType.EVOCATION_ILLAGER, 12).handle(e -> {
+            Metadata data = e.getData();
+            data.setId(13);
+            data.setMetaType(MetaType1_9.VarInt);
+            data.setValue(((Byte) data.getValue()).intValue()); // Change the profession for the states
+
+            return data;
+        });
+
+        // Handle Vex (Remove this field completely since the position is not updated correctly when idling for bats. Sad ):
+        registerMetaHandler().filter(Entity1_11Types.EntityType.VEX, 12).handle(e -> {
+            Metadata data = e.getData();
+            data.setValue((byte) 0x00);
+            return data;
+        });
+
+        // Handle VindicationIllager
+        registerMetaHandler().filter(Entity1_11Types.EntityType.VINDICATION_ILLAGER, 12).handle(e -> {
+            Metadata data = e.getData();
+            data.setId(13);
+            data.setMetaType(MetaType1_9.VarInt);
+            data.setValue(((Number) data.getValue()).intValue() == 1 ? 2 : 4);
+            return data;
+        });
+
+        /*
+            HORSES
+         */
+
+        // Handle horse flags
+        registerMetaHandler().filter(Entity1_11Types.EntityType.ABSTRACT_HORSE, true, 13).handle(e -> {
+            Metadata data = e.getData();
+            byte b = (byte) data.getValue();
+            if (e.getEntity().has(ChestedHorseStorage.class) &&
+                    e.getEntity().get(ChestedHorseStorage.class).isChested()) {
+                b |= 0x08; // Chested
+                data.setValue(b);
+            }
+            return data;
+        });
+
+        // Create chested horse storage
+        registerMetaHandler().filter(Entity1_11Types.EntityType.CHESTED_HORSE, true).handle(e -> {
+            if (!e.getEntity().has(ChestedHorseStorage.class))
+                e.getEntity().put(new ChestedHorseStorage());
+            return e.getData();
+        });
+
+        // Handle horse armor
+        registerMetaHandler().filter(Entity1_11Types.EntityType.HORSE, 16).handleIndexChange(17);
+
+        // Handle chested horse
+        registerMetaHandler().filter(Entity1_11Types.EntityType.CHESTED_HORSE, true, 15).handle(e -> {
+            ChestedHorseStorage storage = e.getEntity().get(ChestedHorseStorage.class);
+            boolean b = (boolean) e.getData().getValue();
+            storage.setChested(b);
+
+            throw RemovedValueException.EX;
+        });
+
+        // Get rid of Liama metadata
+        registerMetaHandler().filter(Entity1_11Types.EntityType.LIAMA).handle(e -> {
+            Metadata data = e.getData();
+            ChestedHorseStorage storage = e.getEntity().get(ChestedHorseStorage.class);
+
+            int index = e.getIndex();
+            // Store them for later (:
+            switch (index) {
+                case 16:
+                    storage.setLiamaStrength((int) data.getValue());
+                    throw RemovedValueException.EX;
+                case 17:
+                    storage.setLiamaCarpetColor((int) data.getValue());
+                    throw RemovedValueException.EX;
+                case 18:
+                    storage.setLiamaVariant((int) data.getValue());
+                    throw RemovedValueException.EX;
+            }
+            return e.getData();
+        });
+
+        // Handle Horse (Correct owner)
+        registerMetaHandler().filter(Entity1_11Types.EntityType.ABSTRACT_HORSE, true, 14).handleIndexChange(16);
+
+        // Handle villager - Change non-existing profession
+        registerMetaHandler().filter(Entity1_11Types.EntityType.VILLAGER, 13).handle(e -> {
+            Metadata data = e.getData();
+            if ((int) data.getValue() == 5)
+                data.setValue(0);
+
+            return data;
+        });
+
+        // handle new Shulker color meta
+        registerMetaHandler().filter(Entity1_11Types.EntityType.SHULKER, 15).removed();
+
+    }
+
+    /*
+        0 - Skeleton
+        1 - Wither Skeleton
+        2 - Stray
+     */
+
+    private Metadata getSkeletonTypeMeta(int type) {
+        return new Metadata(12, MetaType1_9.VarInt, type);
+    }
+
+    /*
+        0 - Zombie
+        1-5 - Villager with profession
+        6 - Husk
+     */
+    private Metadata getZombieTypeMeta(int type) {
+        return new Metadata(13, MetaType1_9.VarInt, type);
+    }
+
+    private void handleZombieType(MetaStorage storage, int type) {
+        Metadata meta = storage.get(13);
+        if (meta == null) {
+            storage.add(getZombieTypeMeta(type));
+        }
+    }
+
+    /*
+        Horse 0
+        Donkey 1
+        Mule 2
+        Zombie horse 3
+        Skeleton horse 4
+    */
+    private Metadata getHorseMetaType(int type) {
+        return new Metadata(14, MetaType1_9.VarInt, type);
+    }
+
+    @Override
+    protected EntityType getTypeFromId(int typeId) {
+        return Entity1_11Types.getTypeFromId(typeId, false);
+    }
+
+    @Override
+    protected EntityType getObjectTypeFromId(int typeId) {
+        return Entity1_11Types.getTypeFromId(typeId, true);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/packets/PlayerPackets1_11.java

@@ -0,0 +1,88 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets;
+
+import net.md_5.bungee.api.chat.BaseComponent;
+import net.md_5.bungee.api.chat.TextComponent;
+import net.md_5.bungee.chat.ComponentSerializer;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.Protocol1_10To1_11;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.remapper.ValueTransformer;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+
+public class PlayerPackets1_11 {
+    private static final ValueTransformer<Short, Float> TO_NEW_FLOAT = new ValueTransformer<Short, Float>(Type.FLOAT) {
+        @Override
+        public Float transform(PacketWrapper wrapper, Short inputValue) throws Exception {
+            return inputValue / 15f;
+        }
+    };
+
+    public void register(Protocol1_10To1_11 protocol) {
+        protocol.registerOutgoing(ClientboundPackets1_9_3.TITLE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Action
+
+                handler(wrapper -> {
+                    int action = wrapper.get(Type.VAR_INT, 0);
+
+                    if (action == 2) { // Handle the new ActionBar
+                        JsonElement message = wrapper.read(Type.COMPONENT);
+
+                        wrapper.clearPacket();
+                        wrapper.setId(ClientboundPackets1_9_3.CHAT_MESSAGE.ordinal());
+
+                        // https://bugs.mojang.com/browse/MC-119145to
+                        BaseComponent[] parsed = ComponentSerializer.parse(message.toString());
+                        String legacy = TextComponent.toLegacyText(parsed);
+                        message = new JsonObject();
+                        message.getAsJsonObject().addProperty("text", legacy);
+
+                        wrapper.write(Type.COMPONENT, message);
+                        wrapper.write(Type.BYTE, (byte) 2);
+                    } else if (action > 2) {
+                        wrapper.set(Type.VAR_INT, 0, action - 1); // Move everything one position down
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.COLLECT_ITEM, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Collected entity id
+                map(Type.VAR_INT); // 1 - Collector entity id
+
+                handler(wrapper -> wrapper.read(Type.VAR_INT)); // Ignore item pickup count
+            }
+        });
+
+
+        protocol.registerIncoming(ServerboundPackets1_9_3.PLAYER_BLOCK_PLACEMENT, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION); // 0 - Location
+                map(Type.VAR_INT); // 1 - Face
+                map(Type.VAR_INT); // 2 - Hand
+
+                map(Type.UNSIGNED_BYTE, TO_NEW_FLOAT);
+                map(Type.UNSIGNED_BYTE, TO_NEW_FLOAT);
+                map(Type.UNSIGNED_BYTE, TO_NEW_FLOAT);
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/packets/SoundPackets1_11.java

@@ -0,0 +1,116 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11.packets;
+
+import nl.matsv.viabackwards.api.rewriters.LegacySoundRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_10to1_11.Protocol1_10To1_11;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+
+public class SoundPackets1_11 extends LegacySoundRewriter<Protocol1_10To1_11> {
+
+    public SoundPackets1_11(Protocol1_10To1_11 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_9_3.NAMED_SOUND, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // 0 - Sound name
+                map(Type.VAR_INT); // 1 - Sound Category
+                map(Type.INT); // 2 - x
+                map(Type.INT); // 3 - y
+                map(Type.INT); // 4 - z
+                map(Type.FLOAT); // 5 - Volume
+                map(Type.FLOAT); // 6 - Pitch
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SOUND, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Sound name
+                map(Type.VAR_INT); // 1 - Sound Category
+                map(Type.INT); // 2 - x
+                map(Type.INT); // 3 - y
+                map(Type.INT); // 4 - z
+                map(Type.FLOAT); // 5 - Volume
+                map(Type.FLOAT); // 6 - Pitch
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int oldId = wrapper.get(Type.VAR_INT, 0);
+                        int newId = handleSounds(oldId);
+                        if (newId == -1)
+                            wrapper.cancel();
+                        else {
+                            if (hasPitch(oldId))
+                                wrapper.set(Type.FLOAT, 1, handlePitch(oldId));
+                            wrapper.set(Type.VAR_INT, 0, newId);
+                        }
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        // Sound replacements, suggestions are always welcome
+        // Automatically generated from PAaaS
+        added(85, 121, 0.5f); // block.shulker_box.close -> block.wooden_trapdoor.close
+        added(86, 122, 0.5f); // block.shulker_box.open -> block.wooden_trapdoor.open
+
+        added(176, 227); // entity.elder_guardian.flop -> entity.guardian.flop
+
+        // 1.10 entity.experience_orb.touch was removed; subtract id and properly map ender pearl sound on that id
+        soundRewrites.put(196, new SoundData(193, false, -1, false));
+
+        added(197, 402, 1.8f); // entity.evocation_fangs.attack -> entity.zombie.attack_iron_door
+        added(198, 370, 0.4f); // entity.evocation_illager.ambient -> entity.villager.ambient
+        added(199, 255, 1.3f); // entity.evocation_illager.cast_spell -> entity.irongolem.hurt
+        added(200, 418, 1.3f); // entity.evocation_illager.death -> entity.zombie_villager.death
+        added(201, 372, 1.3f); // entity.evocation_illager.hurt -> entity.villager.hurt
+        added(202, 137, 0.8f); // entity.evocation_illager.prepare_attack -> entity.elder_guardian.curse
+        added(203, 78, 2f); // entity.evocation_illager.prepare_summon -> block.portal.trigger
+        added(204, 376, 0.6f); // entity.evocation_illager.prepare_wololo -> entity.witch.ambient
+
+        added(279, 230, 1.5f); // entity.llama.ambient -> entity.horse.ambient
+        added(280, 231, 1.6f); // entity.llama.angry -> entity.horse.angry
+        added(281, 164); // entity.llama.chest -> entity.donkey.chest
+        added(282, 165, 1.2f); // entity.llama.death -> entity.donkey.death
+        added(283, 235, 1.1f); // entity.llama.eat -> entity.horse.eat
+        added(284, 166); // entity.llama.hurt -> entity.donkey.hurt
+        added(285, 323, 1.7f); // entity.llama.spit -> entity.shulker.shoot
+        added(286, 241, 0.8f); // entity.llama.step -> entity.horse.step
+        added(287, 423, 0.5f); // entity.llama.swag -> item.armor.equip_generic
+        added(296, 164); // entity.mule.chest -> entity.donkey.chest
+
+        added(390, 233, 0.1f); // entity.vex.ambient -> entity.horse.breathe
+        added(391, 168, 2f); // entity.vex.charge -> entity.elder_guardian.ambient
+        added(392, 144, 0.5f); // entity.vex.death -> entity.cat.death
+        added(393, 146, 2f); // entity.vex.hurt -> entity.cat.hurt
+
+        added(400, 370, 0.7f); // entity.vindication_illager.ambient -> entity.villager.ambient
+        added(401, 371, 0.8f); // entity.vindication_illager.death -> entity.villager.death
+        added(402, 372, 0.7f); // entity.vindication_illager.hurt -> entity.villager.hurt
+
+        added(450, 423, 1.1f); // item.armor.equip_elytra -> item.armor.equip_generic
+        added(455, 427, 1.1f); // item.bottle.empty -> item.bottle.fill
+        added(470, 2, 0.5f); // item.totem.use -> block.anvil.destroy
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/storage/ChestedHorseStorage.java

@@ -0,0 +1,57 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11.storage;
+
+import nl.matsv.viabackwards.api.entities.storage.EntityStorage;
+
+public class ChestedHorseStorage implements EntityStorage {
+    private boolean chested;
+    private int liamaStrength;
+    private int liamaCarpetColor = -1;
+    private int liamaVariant;
+
+    public boolean isChested() {
+        return chested;
+    }
+
+    public void setChested(boolean chested) {
+        this.chested = chested;
+    }
+
+    public int getLiamaStrength() {
+        return liamaStrength;
+    }
+
+    public void setLiamaStrength(int liamaStrength) {
+        this.liamaStrength = liamaStrength;
+    }
+
+    public int getLiamaCarpetColor() {
+        return liamaCarpetColor;
+    }
+
+    public void setLiamaCarpetColor(int liamaCarpetColor) {
+        this.liamaCarpetColor = liamaCarpetColor;
+    }
+
+    public int getLiamaVariant() {
+        return liamaVariant;
+    }
+
+    public void setLiamaVariant(int liamaVariant) {
+        this.liamaVariant = liamaVariant;
+    }
+
+    @Override
+    public String toString() {
+        return "ChestedHorseStorage{" + "chested=" + chested + ", liamaStrength=" + liamaStrength + ", liamaCarpetColor=" + liamaCarpetColor + ", liamaVariant=" + liamaVariant + '}';
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_10to1_11/storage/WindowTracker.java

@@ -0,0 +1,45 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_10to1_11.storage;
+
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+public class WindowTracker extends StoredObject {
+    private String inventory;
+    private int entityId = -1;
+
+    public WindowTracker(UserConnection user) {
+        super(user);
+    }
+
+    public String getInventory() {
+        return inventory;
+    }
+
+    public void setInventory(String inventory) {
+        this.inventory = inventory;
+    }
+
+    public int getEntityId() {
+        return entityId;
+    }
+
+    public void setEntityId(int entityId) {
+        this.entityId = entityId;
+    }
+
+    @Override
+    public String toString() {
+        return "WindowTracker{" + "inventory='" + inventory + '\'' + ", entityId=" + entityId + '}';
+    }
+}
+

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/Protocol1_11_1To1_12.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data.ShoulderTracker;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets.BlockItemPackets1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets.ChatPackets1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets.EntityPackets1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets.SoundPackets1_12;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ServerboundPackets1_12;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9To1_8;
+import us.myles.viaversion.libs.gson.JsonElement;
+
+public class Protocol1_11_1To1_12 extends BackwardsProtocol<ClientboundPackets1_12, ClientboundPackets1_9_3, ServerboundPackets1_12, ServerboundPackets1_9_3> {
+
+    private EntityPackets1_12 entityPackets;
+    private BlockItemPackets1_12 blockItemPackets;
+
+    public Protocol1_11_1To1_12() {
+        super(ClientboundPackets1_12.class, ClientboundPackets1_9_3.class, ServerboundPackets1_12.class, ServerboundPackets1_9_3.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        (entityPackets = new EntityPackets1_12(this)).register();
+        (blockItemPackets = new BlockItemPackets1_12(this)).register();
+        new SoundPackets1_12(this).register();
+        new ChatPackets1_12(this).register();
+
+        registerOutgoing(ClientboundPackets1_12.TITLE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    int action = wrapper.passthrough(Type.VAR_INT);
+                    if (action >= 0 && action <= 2) {
+                        JsonElement component = wrapper.read(Type.COMPONENT);
+                        wrapper.write(Type.COMPONENT, Protocol1_9To1_8.fixJson(component.toString()));
+                    }
+                });
+            }
+        });
+
+        cancelOutgoing(ClientboundPackets1_12.ADVANCEMENTS);
+        cancelOutgoing(ClientboundPackets1_12.UNLOCK_RECIPES);
+        cancelOutgoing(ClientboundPackets1_12.SELECT_ADVANCEMENTS_TAB);
+    }
+
+    @Override
+    public void init(UserConnection user) {
+        // Register ClientWorld
+        if (!user.has(ClientWorld.class)) {
+            user.put(new ClientWorld(user));
+        }
+
+        // Register EntityTracker if it doesn't exist yet.
+        if (!user.has(EntityTracker.class)) {
+            user.put(new EntityTracker(user));
+        }
+
+        user.put(new ShoulderTracker(user));
+
+        // Init protocol in EntityTracker
+        user.get(EntityTracker.class).initProtocol(this);
+    }
+
+    public EntityPackets1_12 getEntityPackets() {
+        return entityPackets;
+    }
+
+    public BlockItemPackets1_12 getBlockItemPackets() {
+        return blockItemPackets;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/data/AdvancementTranslations.java

@@ -0,0 +1,146 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class AdvancementTranslations {
+    private static final Map<String, String> advancements = new HashMap<>();
+
+    static {
+        add("advancements.nether.get_wither_skull.title", "Spooky Scary Skeleton");
+        add("advancements.husbandry.break_diamond_hoe.description", "Completely use up a diamond hoe, and then reevaluate your life choices");
+        add("advancements.nether.fast_travel.description", "Use the Nether to travel 7km in the Overworld");
+        add("advancements.story.enter_the_end.description", "Enter the End Portal");
+        add("advancements.story.follow_ender_eye.title", "Eye Spy");
+        add("advancements.toast.task", "Advancement Made!");
+        add("advancements.nether.find_fortress.description", "Break your way into a Nether Fortress");
+        add("advancements.story.form_obsidian.description", "Form and mine a block of Obsidian");
+        add("advancements.adventure.sniper_duel.description", "Kill a skeleton with an arrow from more than 50 meters");
+        add("advancements.end.root.description", "Or the beginning?");
+        add("advancements.adventure.kill_a_mob.title", "Monster Hunter");
+        add("advancements.end.elytra.description", "Find an Elytra");
+        add("advancements.end.dragon_breath.description", "Collect dragon's breath in a glass bottle");
+        add("advancements.story.enter_the_nether.title", "We Need to Go Deeper");
+        add("advancements.story.upgrade_tools.title", "Getting an Upgrade");
+        add("advancements.story.lava_bucket.title", "Hot Stuff");
+        add("advancements.story.shiny_gear.title", "Cover Me With Diamonds");
+        add("advancements.story.smelt_iron.description", "Smelt an iron ingot");
+        add("chat.type.advancement.goal", "%s has reached the goal %s");
+        add("advancements.husbandry.break_diamond_hoe.title", "Serious Dedication");
+        add("advancements.story.iron_tools.description", "Upgrade your pickaxe");
+        add("advancements.end.respawn_dragon.title", "The End... Again...");
+        add("advancements.husbandry.tame_an_animal.description", "Tame an animal");
+        add("advancements.end.levitate.description", "Levitate up 50 blocks from the attacks of a Shulker");
+        add("advancements.adventure.shoot_arrow.description", "Shoot something with a bow and arrow");
+        add("advancements.nether.root.description", "Bring summer clothes");
+        add("advancements.story.enchant_item.description", "Enchant an item at an Enchanting Table");
+        add("advancements.adventure.root.title", "Adventure");
+        add("advancements.adventure.trade.title", "What a Deal!");
+        add("advancements.husbandry.breed_all_animals.title", "Two by Two");
+        add("advancements.nether.find_fortress.title", "A Terrible Fortress");
+        add("advancements.nether.create_full_beacon.title", "Beaconator");
+        add("advancements.story.cure_zombie_villager.description", "Weaken and then cure a zombie villager");
+        add("advancements.toast.challenge", "Challenge Complete!");
+        add("advancements.nether.create_full_beacon.description", "Bring a beacon to full power");
+        add("advancements.story.follow_ender_eye.description", "Follow an Ender Eye");
+        add("advancements.end.find_end_city.title", "The City at the End of the Game");
+        add("chat.type.advancement.challenge", "%s has completed the challenge %s");
+        add("advancements.story.deflect_arrow.title", "Not Today, Thank You");
+        add("advancements.adventure.kill_all_mobs.description", "Kill one of every hostile monster");
+        add("advancements.story.smelt_iron.title", "Acquire Hardware");
+        add("advancements.end.levitate.title", "Great View From Up Here");
+        add("advancements.end.kill_dragon.title", "Free the End");
+        add("advancements.end.kill_dragon.description", "Good luck");
+        add("advancements.nether.brew_potion.title", "Local Brewery");
+        add("advancements.story.enchant_item.title", "Enchanter");
+        add("advancements.end.respawn_dragon.description", "Respawn the ender dragon");
+        add("advancements.nether.uneasy_alliance.title", "Uneasy Alliance");
+        add("advancements.nether.root.title", "Nether");
+        add("advancements.nether.brew_potion.description", "Brew a potion");
+        add("advancements.nether.obtain_blaze_rod.title", "Into Fire");
+        add("advancements.nether.summon_wither.title", "Withering Heights");
+        add("advancements.story.root.title", "Minecraft");
+        add("advancements.husbandry.balanced_diet.description", "Eat everything that is edible, even if it's not good for you");
+        add("advancements.nether.uneasy_alliance.description", "Rescue a Ghast from the Nether, bring it safely home to the Overworld... and then kill it.");
+        add("advancements.husbandry.breed_all_animals.description", "Breed all the animals!");
+        add("advancements.adventure.kill_all_mobs.title", "Monsters Hunted");
+        add("advancements.story.cure_zombie_villager.title", "Zombie Doctor");
+        add("advancements.husbandry.plant_seed.title", "A Seedy Place");
+        add("advancements.end.dragon_breath.title", "You Need a Mint");
+        add("advancements.story.mine_stone.title", "Stone Age");
+        add("advancements.end.find_end_city.description", "Go on in, what could happen?");
+        add("advancements.nether.create_beacon.description", "Construct and place a Beacon");
+        add("advancements.adventure.summon_iron_golem.title", "Hired Help");
+        add("advancements.end.elytra.title", "Sky's the Limit");
+        add("chat.type.advancement.task", "%s has made the advancement %s");
+        add("advancements.story.deflect_arrow.description", "Deflect an arrow with a shield");
+        add("advancements.nether.all_effects.description", "Have every effect applied at the same time");
+        add("advancements.story.enter_the_nether.description", "Build, light and enter a Nether Portal");
+        add("advancements.story.mine_diamond.title", "Diamonds!");
+        add("advancements.husbandry.balanced_diet.title", "A Balanced Diet");
+        add("advancements.husbandry.root.title", "Husbandry");
+        add("advancements.story.root.description", "The heart and story of the game");
+        add("advancements.story.upgrade_tools.description", "Construct a better pickaxe");
+        add("advancements.nether.all_effects.title", "How Did We Get Here?");
+        add("advancements.end.enter_end_gateway.title", "Remote Getaway");
+        add("advancements.story.mine_stone.description", "Mine stone with your new pickaxe");
+        add("advancements.husbandry.root.description", "The world is full of friends and food");
+        add("advancements.end.dragon_egg.title", "The Next Generation");
+        add("advancements.toast.goal", "Goal Reached!");
+        add("advancements.empty", "There doesn't seem to be anything here...");
+        add("advancements.husbandry.tame_an_animal.title", "Best Friends Forever");
+        add("advancements.end.root.title", "The End");
+        add("advancements.husbandry.breed_an_animal.title", "The Parrots and the Bats");
+        add("advancements.story.mine_diamond.description", "Acquire diamonds");
+        add("advancements.adventure.sleep_in_bed.title", "Sweet dreams");
+        add("advancements.nether.return_to_sender.title", "Return to Sender");
+        add("advancements.story.obtain_armor.title", "Suit Up");
+        add("advancements.adventure.kill_a_mob.description", "Kill any hostile monster");
+        add("advancements.nether.all_potions.description", "Have every potion effect applied at the same time");
+        add("advancements.story.iron_tools.title", "Isn't It Iron Pick");
+        add("advancements.adventure.sleep_in_bed.description", "Change your respawn point");
+        add("advancements.husbandry.plant_seed.description", "Plant a seed and watch it grow");
+        add("advancements.husbandry.breed_an_animal.description", "Breed two animals together");
+        add("advancements.adventure.shoot_arrow.title", "Take Aim");
+        add("advancements.adventure.adventuring_time.description", "Discover every biome");
+        add("advancements.adventure.adventuring_time.title", "Adventuring Time");
+        add("advancements.nether.get_wither_skull.description", "Obtain a wither skeleton's skull");
+        add("advancements.adventure.summon_iron_golem.description", "Summon an Iron Golem to help defend a village");
+        add("advancements.nether.return_to_sender.description", "Destroy a Ghast with a fireball");
+        add("advancements.adventure.trade.description", "Successfully trade with a Villager");
+        add("advancements.story.obtain_armor.description", "Protect yourself with a piece of iron armor");
+        add("advancements.adventure.root.description", "Adventure, exploration and combat");
+        add("advancements.nether.create_beacon.title", "Bring Home the Beacon");
+        add("advancements.end.dragon_egg.description", "Hold the Dragon Egg");
+        add("advancements.nether.obtain_blaze_rod.description", "Relieve a Blaze of its rod");
+        add("advancements.story.lava_bucket.description", "Fill a bucket with lava");
+        add("advancements.story.form_obsidian.title", "Ice Bucket Challenge");
+        add("advancements.story.enter_the_end.title", "The End?");
+        add("advancements.nether.fast_travel.title", "Subspace Bubble");
+        add("advancements.end.enter_end_gateway.description", "Escape the island");
+        add("advancements.adventure.totem_of_undying.title", "Postmortal");
+        add("advancements.nether.all_potions.title", "A Furious Cocktail");
+        add("advancements.adventure.sniper_duel.title", "Sniper duel");
+        add("advancements.nether.summon_wither.description", "Summon the Wither");
+        add("advancements.adventure.totem_of_undying.description", "Use a Totem of Undying to cheat death");
+        add("advancements.story.shiny_gear.description", "Diamond armor saves lives");
+    }
+
+    private static void add(String key, String value) {
+        advancements.put(key, value);
+    }
+
+    public static String get(String key) {
+        return advancements.get(key);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/data/BlockColors.java

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data;
+
+public class BlockColors {
+    private static final String[] COLORS = new String[16];
+
+    static {
+        COLORS[0] = "White";
+        COLORS[1] = "Orange";
+        COLORS[2] = "Magenta";
+        COLORS[3] = "Light Blue";
+        COLORS[4] = "Yellow";
+        COLORS[5] = "Lime";
+        COLORS[6] = "Pink";
+        COLORS[7] = "Gray";
+        COLORS[8] = "Light Gray";
+        COLORS[9] = "Cyan";
+        COLORS[10] = "Purple";
+        COLORS[11] = "Blue";
+        COLORS[12] = "Brown";
+        COLORS[13] = "Green";
+        COLORS[14] = "Red";
+        COLORS[15] = "Black";
+    }
+
+    public static String get(int key) {
+        return key >= 0 && key < COLORS.length ? COLORS[key] : "Unknown color";
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/data/MapColorMapping.java

@@ -0,0 +1,80 @@
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data;
+
+import us.myles.viaversion.libs.fastutil.ints.Int2IntMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
+
+public class MapColorMapping {
+    private static final Int2IntMap MAPPING = new Int2IntOpenHashMap(64, 1F);
+
+    static {
+        MAPPING.defaultReturnValue(-1);
+        MAPPING.put(144, 59); // (148, 124, 114) -> (148, 124, 114)
+        MAPPING.put(145, 56); // (180, 153, 139) -> (180, 153, 139)
+        MAPPING.put(146, 56); // (209, 177, 161) -> (209, 177, 161)
+        MAPPING.put(147, 45); // (111, 94, 85) -> (111, 94, 85)
+        MAPPING.put(148, 63); // (112, 58, 25) -> (112, 58, 25)
+        MAPPING.put(149, 60); // (137, 71, 31) -> (137, 71, 31)
+        MAPPING.put(150, 60); // (159, 82, 36) -> (159, 82, 36)
+        MAPPING.put(151, 136); // (84, 43, 19) -> (84, 43, 19)
+        MAPPING.put(152, 83); // (105, 61, 76) -> (105, 61, 76)
+        MAPPING.put(153, 83); // (129, 75, 93) -> (129, 75, 93)
+        MAPPING.put(154, 80); // (149, 87, 108) -> (149, 87, 108)
+        MAPPING.put(155, 115); // (79, 46, 57) -> (79, 46, 57)
+        MAPPING.put(156, 39); // (79, 76, 97) -> (79, 76, 97)
+        MAPPING.put(157, 39); // (97, 93, 119) -> (97, 93, 119)
+        MAPPING.put(158, 36); // (112, 108, 138) -> (112, 108, 138)
+        MAPPING.put(159, 47); // (59, 57, 73) -> (59, 57, 73)
+        MAPPING.put(160, 60); // (131, 94, 25) -> (131, 94, 25)
+        MAPPING.put(161, 61); // (160, 115, 31) -> (160, 115, 31)
+        MAPPING.put(162, 62); // (186, 133, 36) -> (186, 133, 36)
+        MAPPING.put(163, 137); // (98, 70, 19) -> (98, 70, 19)
+        MAPPING.put(164, 108); // (73, 83, 37) -> (73, 83, 37)
+        MAPPING.put(165, 108); // (89, 101, 46) -> (89, 101, 46)
+        MAPPING.put(166, 109); // (103, 117, 53) -> (103, 117, 53)
+        MAPPING.put(167, 111); // (55, 62, 28) -> (55, 62, 28)
+        MAPPING.put(168, 112); // (113, 54, 55) -> (113, 54, 55)
+        MAPPING.put(169, 113); // (138, 66, 67) -> (138, 66, 67)
+        MAPPING.put(170, 114); // (160, 77, 78) -> (160, 77, 78)
+        MAPPING.put(171, 115); // (85, 41, 41) -> (85, 41, 41)
+        MAPPING.put(172, 118); // (40, 29, 25) -> (40, 29, 25)
+        MAPPING.put(173, 107); // (49, 35, 30) -> (49, 35, 30)
+        MAPPING.put(174, 107); // (57, 41, 35) -> (57, 41, 35)
+        MAPPING.put(175, 118); // (30, 22, 19) -> (30, 22, 19)
+        MAPPING.put(176, 91); // (95, 76, 69) -> (95, 76, 69)
+        MAPPING.put(177, 45); // (116, 92, 85) -> (116, 92, 85)
+        MAPPING.put(178, 46); // (135, 107, 98) -> (135, 107, 98)
+        MAPPING.put(179, 47); // (71, 57, 52) -> (71, 57, 52)
+        MAPPING.put(180, 85); // (61, 65, 65) -> (61, 65, 65)
+        MAPPING.put(181, 44); // (75, 79, 79) -> (75, 79, 79)
+        MAPPING.put(182, 27); // (87, 92, 92) -> (87, 92, 92)
+        MAPPING.put(183, 84); // (46, 49, 49) -> (46, 49, 49)
+        MAPPING.put(184, 83); // (86, 52, 62) -> (86, 52, 62)
+        MAPPING.put(185, 83); // (105, 63, 76) -> (105, 63, 76)
+        MAPPING.put(186, 83); // (122, 73, 88) -> (122, 73, 88)
+        MAPPING.put(187, 84); // (65, 39, 47) -> (65, 39, 47)
+        MAPPING.put(188, 84); // (54, 44, 65) -> (54, 44, 65)
+        MAPPING.put(189, 71); // (66, 53, 79) -> (66, 53, 79)
+        MAPPING.put(190, 71); // (76, 62, 92) -> (76, 62, 92)
+        MAPPING.put(191, 87); // (40, 33, 49) -> (40, 33, 49)
+        MAPPING.put(192, 107); // (54, 35, 25) -> (54, 35, 25)
+        MAPPING.put(193, 139); // (66, 43, 30) -> (66, 43, 30)
+        MAPPING.put(194, 43); // (76, 50, 35) -> (76, 50, 35)
+        MAPPING.put(195, 107); // (40, 26, 19) -> (40, 26, 19)
+        MAPPING.put(196, 111); // (54, 58, 30) -> (54, 58, 30)
+        MAPPING.put(197, 111); // (66, 71, 36) -> (66, 71, 36)
+        MAPPING.put(198, 111); // (76, 82, 42) -> (76, 82, 42)
+        MAPPING.put(199, 107); // (40, 43, 22) -> (40, 43, 22)
+        MAPPING.put(200, 112); // (100, 42, 32) -> (100, 42, 32)
+        MAPPING.put(201, 113); // (123, 52, 40) -> (123, 52, 40)
+        MAPPING.put(202, 113); // (142, 60, 46) -> (142, 60, 46)
+        MAPPING.put(203, 115); // (75, 32, 24) -> (75, 32, 24)
+        MAPPING.put(204, 116); // (26, 16, 11) -> (26, 16, 11)
+        MAPPING.put(205, 117); // (32, 19, 14) -> (32, 19, 14)
+        MAPPING.put(206, 107); // (37, 22, 16) -> (37, 22, 16)
+        MAPPING.put(207, 119); // (20, 12, 8) -> (20, 12, 8)
+    }
+
+    public static int getNearestOldColor(int color) {
+        return MAPPING.getOrDefault(color, color);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/data/ParrotStorage.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data;
+
+
+import nl.matsv.viabackwards.api.entities.storage.EntityStorage;
+
+public class ParrotStorage implements EntityStorage {
+    private boolean tamed = true;
+    private boolean sitting = true;
+
+    public boolean isTamed() {
+        return tamed;
+    }
+
+    public void setTamed(boolean tamed) {
+        this.tamed = tamed;
+    }
+
+    public boolean isSitting() {
+        return sitting;
+    }
+
+    public void setSitting(boolean sitting) {
+        this.sitting = sitting;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/data/ShoulderTracker.java

@@ -0,0 +1,111 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data;
+
+import net.md_5.bungee.api.ChatColor;
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.Protocol1_11_1To1_12;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_9to1_8.Protocol1_9To1_8;
+
+public class ShoulderTracker extends StoredObject {
+    private int entityId;
+    private String leftShoulder;
+    private String rightShoulder;
+
+    public ShoulderTracker(UserConnection user) {
+        super(user);
+    }
+
+    public void update() {
+        PacketWrapper wrapper = new PacketWrapper(0x0F, null, getUser());
+
+        wrapper.write(Type.COMPONENT, Protocol1_9To1_8.fixJson(generateString()));
+        wrapper.write(Type.BYTE, (byte) 2);
+
+        try {
+            wrapper.send(Protocol1_11_1To1_12.class);
+        } catch (Exception e) {
+            ViaBackwards.getPlatform().getLogger().severe("Failed to send the shoulder indication");
+            e.printStackTrace();
+        }
+    }
+
+    // Does actionbar not support json colors? :(
+    private String generateString() {
+        StringBuilder builder = new StringBuilder();
+
+        // Empty spaces because the non-json formatting is weird
+        builder.append("  ");
+        if (leftShoulder == null)
+            builder.append(ChatColor.RED).append(ChatColor.BOLD).append("Nothing");
+        else
+            builder.append(ChatColor.DARK_GREEN).append(ChatColor.BOLD).append(getName(leftShoulder));
+
+        builder.append(ChatColor.DARK_GRAY).append(ChatColor.BOLD).append(" <- ")
+                .append(ChatColor.GRAY).append(ChatColor.BOLD).append("Shoulders")
+                .append(ChatColor.DARK_GRAY).append(ChatColor.BOLD).append(" -> ");
+
+        if (rightShoulder == null)
+            builder.append(ChatColor.RED).append(ChatColor.BOLD).append("Nothing");
+        else
+            builder.append(ChatColor.DARK_GREEN).append(ChatColor.BOLD).append(getName(rightShoulder));
+
+        return builder.toString();
+    }
+
+    private String getName(String current) {
+        if (current.startsWith("minecraft:"))
+            current = current.substring(10);
+        String[] array = current.split("_");
+        StringBuilder builder = new StringBuilder();
+
+        for (String s : array) {
+            builder.append(s.substring(0, 1).toUpperCase())
+                    .append(s.substring(1))
+                    .append(" ");
+        }
+
+        return builder.toString();
+    }
+
+    public int getEntityId() {
+        return entityId;
+    }
+
+    public void setEntityId(int entityId) {
+        this.entityId = entityId;
+    }
+
+    public String getLeftShoulder() {
+        return leftShoulder;
+    }
+
+    public void setLeftShoulder(String leftShoulder) {
+        this.leftShoulder = leftShoulder;
+    }
+
+    public String getRightShoulder() {
+        return rightShoulder;
+    }
+
+    public void setRightShoulder(String rightShoulder) {
+        this.rightShoulder = rightShoulder;
+    }
+
+    @Override
+    public String toString() {
+        return "ShoulderTracker{" + "entityId=" + entityId + ", leftShoulder='" + leftShoulder + '\'' + ", rightShoulder='" + rightShoulder + '\'' + '}';
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/packets/BlockItemPackets1_12.java

@@ -0,0 +1,249 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets;
+
+import nl.matsv.viabackwards.api.rewriters.LegacyBlockItemRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.Protocol1_11_1To1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data.MapColorMapping;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.minecraft.BlockChangeRecord;
+import us.myles.ViaVersion.api.minecraft.chunks.Chunk;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.rewriters.ItemRewriter;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
+import us.myles.ViaVersion.protocols.protocol1_9_1_2to1_9_3_4.types.Chunk1_9_3_4Type;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+
+public class BlockItemPackets1_12 extends LegacyBlockItemRewriter<Protocol1_11_1To1_12> {
+
+    public BlockItemPackets1_12(Protocol1_11_1To1_12 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_12.MAP_DATA, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                map(Type.BYTE);
+                map(Type.BOOLEAN);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int count = wrapper.passthrough(Type.VAR_INT);
+                        for (int i = 0; i < count * 3; i++) {
+                            wrapper.passthrough(Type.BYTE);
+                        }
+                    }
+                });
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        short columns = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                        if (columns <= 0) return;
+
+                        short rows = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                        wrapper.passthrough(Type.UNSIGNED_BYTE); // X
+                        wrapper.passthrough(Type.UNSIGNED_BYTE); // Z
+                        byte[] data = wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                        for (int i = 0; i < data.length; i++) {
+                            short color = (short) (data[i] & 0xFF);
+                            if (color > 143) {
+                                color = (short) MapColorMapping.getNearestOldColor(color);
+                                data[i] = (byte) color;
+                            }
+                        }
+                        wrapper.write(Type.BYTE_ARRAY_PRIMITIVE, data);
+                    }
+                });
+            }
+        });
+
+        ItemRewriter itemRewriter = new ItemRewriter(protocol, this::handleItemToClient, this::handleItemToServer);
+
+        itemRewriter.registerSetSlot(ClientboundPackets1_12.SET_SLOT, Type.ITEM);
+        itemRewriter.registerWindowItems(ClientboundPackets1_12.WINDOW_ITEMS, Type.ITEM_ARRAY);
+        itemRewriter.registerEntityEquipment(ClientboundPackets1_12.ENTITY_EQUIPMENT, Type.ITEM);
+
+        // Plugin message Packet -> Trading
+        protocol.registerOutgoing(ClientboundPackets1_12.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // 0 - Channel
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (wrapper.get(Type.STRING, 0).equalsIgnoreCase("MC|TrList")) {
+                            wrapper.passthrough(Type.INT); // Passthrough Window ID
+
+                            int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                            for (int i = 0; i < size; i++) {
+                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Input Item
+                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Output Item
+
+                                boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
+                                if (secondItem)
+                                    wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Second Item
+
+                                wrapper.passthrough(Type.BOOLEAN); // Trade disabled
+                                wrapper.passthrough(Type.INT); // Number of tools uses
+                                wrapper.passthrough(Type.INT); // Maximum number of trade uses
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_9_3.CLICK_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot
+                map(Type.BYTE); // 2 - Button
+                map(Type.SHORT); // 3 - Action number
+                map(Type.VAR_INT); // 4 - Mode
+                map(Type.ITEM); // 5 - Clicked Item
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (wrapper.get(Type.VAR_INT, 0) == 1) { // Shift click
+                            // https://github.com/ViaVersion/ViaVersion/pull/754
+                            // Previously clients grab the item from the clicked slot *before* it has
+                            // been moved however now they grab the slot item *after* it has been moved
+                            // and send that in the packet.
+                            wrapper.set(Type.ITEM, 0, null); // Set null item (probably will work)
+
+                            // Apologize (may happen in some cases, maybe if inventory is full?)
+                            PacketWrapper confirm = wrapper.create(0x6);
+                            confirm.write(Type.BYTE, wrapper.get(Type.UNSIGNED_BYTE, 0).byteValue());
+                            confirm.write(Type.SHORT, wrapper.get(Type.SHORT, 1));
+                            confirm.write(Type.BOOLEAN, false); // Success - not used
+
+                            wrapper.sendToServer(Protocol1_11_1To1_12.class, true, true);
+                            wrapper.cancel();
+                            confirm.sendToServer(Protocol1_11_1To1_12.class, true, true);
+                            return;
+
+                        }
+                        Item item = wrapper.get(Type.ITEM, 0);
+                        handleItemToServer(item);
+                    }
+                });
+            }
+        });
+
+        itemRewriter.registerCreativeInvAction(ServerboundPackets1_9_3.CREATIVE_INVENTORY_ACTION, Type.ITEM);
+
+        protocol.registerOutgoing(ClientboundPackets1_12.CHUNK_DATA, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        ClientWorld clientWorld = wrapper.user().get(ClientWorld.class);
+
+                        Chunk1_9_3_4Type type = new Chunk1_9_3_4Type(clientWorld); // Use the 1.9.4 Chunk type since nothing changed.
+                        Chunk chunk = wrapper.passthrough(type);
+
+                        handleChunk(chunk);
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_12.BLOCK_CHANGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION); // 0 - Block Position
+                map(Type.VAR_INT); // 1 - Block
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int idx = wrapper.get(Type.VAR_INT, 0);
+                        wrapper.set(Type.VAR_INT, 0, handleBlockID(idx));
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_12.MULTI_BLOCK_CHANGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Chunk X
+                map(Type.INT); // 1 - Chunk Z
+                map(Type.BLOCK_CHANGE_RECORD_ARRAY);
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        for (BlockChangeRecord record : wrapper.get(Type.BLOCK_CHANGE_RECORD_ARRAY, 0)) {
+                            record.setBlockId(handleBlockID(record.getBlockId()));
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_12.BLOCK_ENTITY_DATA, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.POSITION); // 0 - Position
+                map(Type.UNSIGNED_BYTE); // 1 - Action
+                map(Type.NBT); // 2 - NBT
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        // Remove bed color
+                        if (wrapper.get(Type.UNSIGNED_BYTE, 0) == 11)
+                            wrapper.cancel();
+                    }
+                });
+            }
+        });
+
+        protocol.getEntityPackets().registerMetaHandler().handle(e -> {
+            Metadata data = e.getData();
+
+            if (data.getMetaType().getType().equals(Type.ITEM)) // Is Item
+                data.setValue(handleItemToClient((Item) data.getValue()));
+
+            return data;
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_9_3.CLIENT_STATUS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // Action ID
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        // Open Inventory
+                        if (wrapper.get(Type.VAR_INT, 0) == 2) {
+                            wrapper.cancel();
+                        }
+                    }
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/packets/ChatItemRewriter.java

@@ -0,0 +1,48 @@
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets;
+
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.viaversion.libs.gson.JsonArray;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+import us.myles.viaversion.libs.gson.JsonPrimitive;
+
+public class ChatItemRewriter {
+
+    public static void toClient(JsonElement element, UserConnection user) {
+        if (element instanceof JsonObject) {
+            JsonObject obj = (JsonObject) element;
+            if (obj.has("hoverEvent")) {
+                if (obj.get("hoverEvent") instanceof JsonObject) {
+                    JsonObject hoverEvent = (JsonObject) obj.get("hoverEvent");
+                    if (hoverEvent.has("action") && hoverEvent.has("value")) {
+                        String type = hoverEvent.get("action").getAsString();
+                        if (type.equals("show_item") || type.equals("show_entity")) {
+                            JsonElement value = hoverEvent.get("value");
+
+                            if (value.isJsonArray()) {
+                                JsonArray newArray = new JsonArray();
+
+                                int index = 0;
+                                for (JsonElement valueElement : value.getAsJsonArray()) {
+                                    if (valueElement.isJsonPrimitive() && valueElement.getAsJsonPrimitive().isString()) {
+                                        String newValue = index + ":" + valueElement.getAsString();
+                                        newArray.add(new JsonPrimitive(newValue));
+                                    }
+                                }
+
+                                hoverEvent.add("value", newArray);
+                            }
+                        }
+                    }
+                }
+            } else if (obj.has("extra")) {
+                toClient(obj.get("extra"), user);
+            }
+        } else if (element instanceof JsonArray) {
+            JsonArray array = (JsonArray) element;
+            for (JsonElement value : array) {
+                toClient(value, user);
+            }
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/packets/ChatPackets1_12.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets;
+
+import nl.matsv.viabackwards.api.rewriters.Rewriter;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.Protocol1_11_1To1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data.AdvancementTranslations;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.rewriters.ComponentRewriter;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+
+public class ChatPackets1_12 extends Rewriter<Protocol1_11_1To1_12> {
+
+    private final ComponentRewriter componentRewriter = new ComponentRewriter() {
+        @Override
+        protected void handleTranslate(JsonObject object, String translate) {
+            String text = AdvancementTranslations.get(translate);
+            if (text != null) {
+                object.addProperty("translate", text);
+            }
+        }
+    };
+
+    public ChatPackets1_12(Protocol1_11_1To1_12 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_12.CHAT_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    JsonElement element = wrapper.passthrough(Type.COMPONENT);
+                    componentRewriter.processText(element);
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/packets/EntityPackets1_12.java

@@ -0,0 +1,308 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets;
+
+import nl.matsv.viabackwards.api.exceptions.RemovedValueException;
+import nl.matsv.viabackwards.api.rewriters.LegacyEntityRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.Protocol1_11_1To1_12;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data.ParrotStorage;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.data.ShoulderTracker;
+import nl.matsv.viabackwards.utils.Block;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.entities.Entity1_12Types;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_12;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.version.Types1_12;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+
+import java.util.Optional;
+
+public class EntityPackets1_12 extends LegacyEntityRewriter<Protocol1_11_1To1_12> {
+
+    public EntityPackets1_12(Protocol1_11_1To1_12 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_12.SPAWN_ENTITY, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - UUID
+                map(Type.BYTE); // 2 - Type
+                map(Type.DOUBLE); // 3 - x
+                map(Type.DOUBLE); // 4 - y
+                map(Type.DOUBLE); // 5 - z
+                map(Type.BYTE); // 6 - Pitch
+                map(Type.BYTE); // 7 - Yaw
+                map(Type.INT); // 8 - data
+
+                // Track Entity
+                handler(getObjectTrackerHandler());
+                handler(getObjectRewriter(id -> Entity1_12Types.ObjectType.findById(id).orElse(null)));
+
+                // Handle FallingBlock blocks
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        Optional<Entity1_12Types.ObjectType> type = Entity1_12Types.ObjectType.findById(wrapper.get(Type.BYTE, 0));
+                        if (type.isPresent() && type.get() == Entity1_12Types.ObjectType.FALLING_BLOCK) {
+                            int objectData = wrapper.get(Type.INT, 0);
+                            int objType = objectData & 4095;
+                            int data = objectData >> 12 & 15;
+
+                            Block block = getProtocol().getBlockItemPackets().handleBlock(objType, data);
+                            if (block == null) {
+                                return;
+                            }
+
+                            wrapper.set(Type.INT, 0, block.getId() | block.getData() << 12);
+                        }
+                    }
+                });
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_12.SPAWN_EXPERIENCE_ORB, Entity1_12Types.EntityType.EXPERIENCE_ORB);
+        registerExtraTracker(ClientboundPackets1_12.SPAWN_GLOBAL_ENTITY, Entity1_12Types.EntityType.WEATHER);
+
+        protocol.registerOutgoing(ClientboundPackets1_12.SPAWN_MOB, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - UUID
+                map(Type.VAR_INT); // 2 - Entity Type
+                map(Type.DOUBLE); // 3 - X
+                map(Type.DOUBLE); // 4 - Y
+                map(Type.DOUBLE); // 5 - Z
+                map(Type.BYTE); // 6 - Yaw
+                map(Type.BYTE); // 7 - Pitch
+                map(Type.BYTE); // 8 - Head Pitch
+                map(Type.SHORT); // 9 - Velocity X
+                map(Type.SHORT); // 10 - Velocity Y
+                map(Type.SHORT); // 11 - Velocity Z
+                map(Types1_12.METADATA_LIST); // 12 - Metadata
+
+                // Track entity
+                handler(getTrackerHandler());
+
+                // Rewrite entity type / metadata
+                handler(getMobSpawnRewriter(Types1_12.METADATA_LIST));
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_12.SPAWN_PAINTING, Entity1_12Types.EntityType.PAINTING);
+
+        protocol.registerOutgoing(ClientboundPackets1_12.SPAWN_PLAYER, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.UUID); // 1 - Player UUID
+                map(Type.DOUBLE); // 2 - X
+                map(Type.DOUBLE); // 3 - Y
+                map(Type.DOUBLE); // 4 - Z
+                map(Type.BYTE); // 5 - Yaw
+                map(Type.BYTE); // 6 - Pitch
+                map(Types1_12.METADATA_LIST); // 7 - Metadata list
+
+                handler(getTrackerAndMetaHandler(Types1_12.METADATA_LIST, Entity1_12Types.EntityType.PLAYER));
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_12.JOIN_GAME, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Entity ID
+                map(Type.UNSIGNED_BYTE); // 1 - Gamemode
+                map(Type.INT); // 2 - Dimension
+
+                handler(getTrackerHandler(Entity1_12Types.EntityType.PLAYER, Type.INT));
+
+                handler(getDimensionHandler(1));
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        ShoulderTracker tracker = wrapper.user().get(ShoulderTracker.class);
+                        tracker.setEntityId(wrapper.get(Type.INT, 0));
+                    }
+                });
+
+                // Send fake inventory achievement
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper packetWrapper) throws Exception {
+                        PacketWrapper wrapper = new PacketWrapper(0x07, null, packetWrapper.user());
+
+                        wrapper.write(Type.VAR_INT, 1);
+                        wrapper.write(Type.STRING, "achievement.openInventory");
+                        wrapper.write(Type.VAR_INT, 1);
+
+                        wrapper.send(Protocol1_11_1To1_12.class);
+                    }
+                });
+            }
+        });
+
+        registerRespawn(ClientboundPackets1_12.RESPAWN);
+        registerEntityDestroy(ClientboundPackets1_12.DESTROY_ENTITIES);
+        registerMetadataRewriter(ClientboundPackets1_12.ENTITY_METADATA, Types1_12.METADATA_LIST);
+
+        protocol.registerOutgoing(ClientboundPackets1_12.ENTITY_PROPERTIES, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                map(Type.INT);
+                handler(wrapper -> {
+                    int size = wrapper.get(Type.INT, 0);
+                    int newSize = size;
+                    for (int i = 0; i < size; i++) {
+                        String key = wrapper.read(Type.STRING);
+                        // Remove new attribute
+                        if (key.equals("generic.flyingSpeed")) {
+                            newSize--;
+                            wrapper.read(Type.DOUBLE);
+                            int modSize = wrapper.read(Type.VAR_INT);
+                            for (int j = 0; j < modSize; j++) {
+                                wrapper.read(Type.UUID);
+                                wrapper.read(Type.DOUBLE);
+                                wrapper.read(Type.BYTE);
+                            }
+                        } else {
+                            wrapper.write(Type.STRING, key);
+                            wrapper.passthrough(Type.DOUBLE);
+                            int modSize = wrapper.passthrough(Type.VAR_INT);
+                            for (int j = 0; j < modSize; j++) {
+                                wrapper.passthrough(Type.UUID);
+                                wrapper.passthrough(Type.DOUBLE);
+                                wrapper.passthrough(Type.BYTE);
+                            }
+                        }
+                    }
+
+                    if (newSize != size) {
+                        wrapper.set(Type.INT, 0, newSize);
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        mapEntity(Entity1_12Types.EntityType.PARROT, Entity1_12Types.EntityType.BAT).mobName("Parrot").spawnMetadata(storage -> storage.add(new Metadata(12, MetaType1_12.Byte, (byte) 0x00)));
+        mapEntity(Entity1_12Types.EntityType.ILLUSION_ILLAGER, Entity1_12Types.EntityType.EVOCATION_ILLAGER).mobName("Illusioner");
+
+        // Handle Illager
+        registerMetaHandler().filter(Entity1_12Types.EntityType.EVOCATION_ILLAGER, true, 12).removed();
+        registerMetaHandler().filter(Entity1_12Types.EntityType.EVOCATION_ILLAGER, true, 13).handleIndexChange(12);
+
+        registerMetaHandler().filter(Entity1_12Types.EntityType.ILLUSION_ILLAGER, 0).handle(e -> {
+            byte mask = (byte) e.getData().getValue();
+
+            if ((mask & 0x20) == 0x20)
+                mask &= ~0x20;
+
+            e.getData().setValue(mask);
+            return e.getData();
+        });
+
+        // Create Parrot storage
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PARROT, true).handle(e -> {
+            if (!e.getEntity().has(ParrotStorage.class))
+                e.getEntity().put(new ParrotStorage());
+            return e.getData();
+        });
+        // Parrot remove animal metadata
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PARROT, 12).removed(); // Is baby
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PARROT, 13).handle(e -> {
+            Metadata data = e.getData();
+            ParrotStorage storage = e.getEntity().get(ParrotStorage.class);
+            boolean isSitting = (((byte) data.getValue()) & 0x01) == 0x01;
+            boolean isTamed = (((byte) data.getValue()) & 0x04) == 0x04;
+
+            if (!storage.isTamed() && isTamed) {
+                // TODO do something to let the user know it's done
+            }
+
+            storage.setTamed(isTamed);
+
+            if (isSitting) {
+                data.setId(12);
+                data.setValue((byte) 0x01);
+                storage.setSitting(true);
+            } else if (storage.isSitting()) {
+                data.setId(12);
+                data.setValue((byte) 0x00);
+                storage.setSitting(false);
+            } else
+                throw RemovedValueException.EX;
+
+            return data;
+        }); // Flags (Is sitting etc, might be useful in the future
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PARROT, 14).removed(); // Owner
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PARROT, 15).removed(); // Variant
+
+        // Left shoulder entity data
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PLAYER, 15).handle(e -> {
+            CompoundTag tag = (CompoundTag) e.getData().getValue();
+            ShoulderTracker tracker = e.getUser().get(ShoulderTracker.class);
+
+            if (tag.isEmpty() && tracker.getLeftShoulder() != null) {
+                tracker.setLeftShoulder(null);
+                tracker.update();
+            } else if (tag.contains("id") && e.getEntity().getEntityId() == tracker.getEntityId()) {
+                String id = (String) tag.get("id").getValue();
+                if (tracker.getLeftShoulder() == null || !tracker.getLeftShoulder().equals(id)) {
+                    tracker.setLeftShoulder(id);
+                    tracker.update();
+                }
+            }
+
+            throw RemovedValueException.EX;
+        });
+
+        // Right shoulder entity data
+        registerMetaHandler().filter(Entity1_12Types.EntityType.PLAYER, 16).handle(e -> {
+            CompoundTag tag = (CompoundTag) e.getData().getValue();
+            ShoulderTracker tracker = e.getUser().get(ShoulderTracker.class);
+
+            if (tag.isEmpty() && tracker.getRightShoulder() != null) {
+                tracker.setRightShoulder(null);
+                tracker.update();
+            } else if (tag.contains("id") && e.getEntity().getEntityId() == tracker.getEntityId()) {
+                String id = (String) tag.get("id").getValue();
+                if (tracker.getRightShoulder() == null || !tracker.getRightShoulder().equals(id)) {
+                    tracker.setRightShoulder(id);
+                    tracker.update();
+                }
+            }
+
+            throw RemovedValueException.EX;
+        });
+    }
+
+    @Override
+    protected EntityType getTypeFromId(int typeId) {
+        return Entity1_12Types.getTypeFromId(typeId, false);
+    }
+
+    @Override
+    protected EntityType getObjectTypeFromId(final int typeId) {
+        return Entity1_12Types.getTypeFromId(typeId, true);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11_1to1_12/packets/SoundPackets1_12.java

@@ -0,0 +1,144 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.packets;
+
+import nl.matsv.viabackwards.api.rewriters.LegacySoundRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_11_1to1_12.Protocol1_11_1To1_12;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
+
+public class SoundPackets1_12 extends LegacySoundRewriter<Protocol1_11_1To1_12> {
+
+    public SoundPackets1_12(Protocol1_11_1To1_12 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_12.NAMED_SOUND, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // 0 - Sound name
+                map(Type.VAR_INT); // 1 - Sound Category
+                map(Type.INT); // 2 - x
+                map(Type.INT); // 3 - y
+                map(Type.INT); // 4 - z
+                map(Type.FLOAT); // 5 - Volume
+                map(Type.FLOAT); // 6 - Pitch
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_12.SOUND, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Sound name
+                map(Type.VAR_INT); // 1 - Sound Category
+                map(Type.INT); // 2 - x
+                map(Type.INT); // 3 - y
+                map(Type.INT); // 4 - z
+                map(Type.FLOAT); // 5 - Volume
+                map(Type.FLOAT); // 6 - Pitch
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int oldId = wrapper.get(Type.VAR_INT, 0);
+                        int newId = handleSounds(oldId);
+                        if (newId == -1) {
+                            wrapper.cancel();
+                            return;
+                        }
+
+                        if (hasPitch(oldId)) {
+                            wrapper.set(Type.FLOAT, 1, handlePitch(oldId));
+                        }
+                        wrapper.set(Type.VAR_INT, 0, newId);
+                    }
+                });
+            }
+        });
+    }
+
+
+    @Override
+    protected void registerRewrites() {
+        // Replacement sounds, suggestions are always welcome
+        // Automatically generated from PAaaS
+        added(26, 277, 1.4f); // block.end_portal.spawn -> entity.lightning.thunder
+        added(27, -1); // block.end_portal_frame.fill
+
+        added(72, 70); // block.note.bell -> block.note.harp
+        added(73, 70); // block.note.chime -> block.note.harp
+        added(74, 70); // block.note.flute -> block.note.harp
+        added(75, 70); // block.note.guitar -> block.note.harp
+        added(80, 70); // block.note.xylophone -> block.note.harp
+
+        added(150, -1); // entity.boat.paddle_land
+        added(151, -1); // entity.boat.paddle_water
+
+        added(152, -1); // entity.bobber.retrieve
+
+        added(195, -1); // entity.endereye.death
+
+        added(274, 198, 0.8f); // entity.illusion_illager.ambient -> entity.evocation_illager.ambient
+        added(275, 199, 0.8f); // entity.illusion_illager.cast_spell -> entity.evocation_illager.cast_spell
+        added(276, 200, 0.8f); // entity.illusion_illager.death -> entity.evocation_illager.death
+        added(277, 201, 0.8f); // entity.illusion_illager.hurt -> entity.evocation_illager.hurt
+        added(278, 191, 0.9f); // entity.illusion_illager.mirror_move -> entity.endermen.teleport
+        added(279, 203, 1.5f); // entity.illusion_illager.prepare_blindness -> entity.evocation_illager.prepare_summon
+        added(280, 202, 0.8f); // entity.illusion_illager.prepare_mirror -> entity.evocation_illager.prepare_attack
+
+        added(319, 133, 0.6f); // entity.parrot.ambient -> entity.bat.ambient
+        added(320, 134, 1.7f); // entity.parrot.death -> entity.bat.death
+        added(321, 219, 1.5f); // entity.parrot.eat -> entity.generic.eat
+        added(322, 136, 0.7f); // entity.parrot.fly -> entity.bat.loop
+        added(323, 135, 1.6f); // entity.parrot.hurt -> entity.bat.hurt
+        added(324, 138, 1.5f); // entity.parrot.imitate.blaze -> entity.blaze.ambient
+        added(325, 163, 1.5f); // entity.parrot.imitate.creeper -> entity.creeper.primed
+        added(326, 170, 1.5f); // entity.parrot.imitate.elder_guardian -> entity.elder_guardian.ambient
+        added(327, 178, 1.5f); // entity.parrot.imitate.enderdragon -> entity.enderdragon.ambient
+        added(328, 186, 1.5f); // entity.parrot.imitate.enderman -> entity.endermen.ambient
+        added(329, 192, 1.5f); // entity.parrot.imitate.endermite -> entity.endermite.ambient
+        added(330, 198, 1.5f); // entity.parrot.imitate.evocation_illager -> entity.evocation_illager.ambient
+        added(331, 226, 1.5f); // entity.parrot.imitate.ghast -> entity.ghast.ambient
+        added(332, 259, 1.5f); // entity.parrot.imitate.husk -> entity.husk.ambient
+        added(333, 198, 1.3f); // entity.parrot.imitate.illusion_illager -> entity.evocation_illager.ambient
+        added(334, 291, 1.5f); // entity.parrot.imitate.magmacube -> entity.magmacube.squish
+        added(335, 321, 1.5f); // entity.parrot.imitate.polar_bear -> entity.polar_bear.ambient
+        added(336, 337, 1.5f); // entity.parrot.imitate.shulker -> entity.shulker.ambient
+        added(337, 347, 1.5f); // entity.parrot.imitate.silverfish -> entity.silverfish.ambient
+        added(338, 351, 1.5f); // entity.parrot.imitate.skeleton -> entity.skeleton.ambient
+        added(339, 363, 1.5f); // entity.parrot.imitate.slime -> entity.slime.squish
+        added(340, 376, 1.5f); // entity.parrot.imitate.spider -> entity.spider.ambient
+        added(341, 385, 1.5f); // entity.parrot.imitate.stray -> entity.stray.ambient
+        added(342, 390, 1.5f); // entity.parrot.imitate.vex -> entity.vex.ambient
+        added(343, 400, 1.5f); // entity.parrot.imitate.vindication_illager -> entity.vindication_illager.ambient
+        added(344, 403, 1.5f); // entity.parrot.imitate.witch -> entity.witch.ambient
+        added(345, 408, 1.5f); // entity.parrot.imitate.wither -> entity.wither.ambient
+        added(346, 414, 1.5f); // entity.parrot.imitate.wither_skeleton -> entity.wither_skeleton.ambient
+        added(347, 418, 1.5f); // entity.parrot.imitate.wolf -> entity.wolf.ambient
+        added(348, 427, 1.5f); // entity.parrot.imitate.zombie -> entity.zombie.ambient
+        added(349, 438, 1.5f); // entity.parrot.imitate.zombie_pigman -> entity.zombie_pig.ambient
+        added(350, 442, 1.5f); // entity.parrot.imitate.zombie_villager -> entity.zombie_villager.ambient
+        added(351, 155); // entity.parrot.step -> entity.chicken.step
+
+        added(368, 316); // entity.player.hurt_drown -> entity.player.hurt
+        added(369, 316); // entity.player.hurt_on_fire -> entity.player.hurt
+
+        // No replacement sounds for these, since it could be confusing, the toast doesn't show up
+        added(544, -1); // ui.toast.in
+        added(545, -1); // ui.toast.out
+        added(546, 317, 1.5f); // ui.toast.challenge_complete
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11to1_11_1/Protocol1_11To1_11_1.java

@@ -0,0 +1,55 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11to1_11_1;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.packets.EntityPackets1_11_1;
+import nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.packets.ItemPackets1_11_1;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+
+public class Protocol1_11To1_11_1 extends BackwardsProtocol<ClientboundPackets1_9_3, ClientboundPackets1_9_3, ServerboundPackets1_9_3, ServerboundPackets1_9_3> {
+
+    private EntityPackets1_11_1 entityPackets;
+
+    public Protocol1_11To1_11_1() {
+        super(ClientboundPackets1_9_3.class, ClientboundPackets1_9_3.class, ServerboundPackets1_9_3.class, ServerboundPackets1_9_3.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        (entityPackets = new EntityPackets1_11_1(this)).register();
+        new ItemPackets1_11_1(this).register();
+    }
+
+    @Override
+    public void init(UserConnection user) {
+        // Register ClientWorld
+        if (!user.has(ClientWorld.class)) {
+            user.put(new ClientWorld(user));
+        }
+
+        // Register EntityTracker if it doesn't exist yet.
+        if (!user.has(EntityTracker.class)) {
+            user.put(new EntityTracker(user));
+        }
+
+        // Init protocol in EntityTracker
+        user.get(EntityTracker.class).initProtocol(this);
+    }
+
+    public EntityPackets1_11_1 getEntityPackets() {
+        return entityPackets;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11to1_11_1/packets/EntityPackets1_11_1.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.packets;
+
+import nl.matsv.viabackwards.api.rewriters.LegacyEntityRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.Protocol1_11To1_11_1;
+import us.myles.ViaVersion.api.entities.Entity1_11Types;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.version.Types1_9;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+
+public class EntityPackets1_11_1 extends LegacyEntityRewriter<Protocol1_11To1_11_1> {
+
+    public EntityPackets1_11_1(Protocol1_11To1_11_1 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SPAWN_ENTITY, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - UUID
+                map(Type.BYTE); // 2 - Type
+                map(Type.DOUBLE); // 3 - x
+                map(Type.DOUBLE); // 4 - y
+                map(Type.DOUBLE); // 5 - z
+                map(Type.BYTE); // 6 - Pitch
+                map(Type.BYTE); // 7 - Yaw
+                map(Type.INT); // 8 - data
+
+                // Track Entity
+                handler(getObjectTrackerHandler());
+                handler(getObjectRewriter(id -> Entity1_11Types.ObjectType.findById(id).orElse(null)));
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_9_3.SPAWN_EXPERIENCE_ORB, Entity1_11Types.EntityType.EXPERIENCE_ORB);
+        registerExtraTracker(ClientboundPackets1_9_3.SPAWN_GLOBAL_ENTITY, Entity1_11Types.EntityType.WEATHER);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SPAWN_MOB, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity id
+                map(Type.UUID); // 1 - UUID
+                map(Type.VAR_INT); // 2 - Entity Type
+                map(Type.DOUBLE); // 3 - X
+                map(Type.DOUBLE); // 4 - Y
+                map(Type.DOUBLE); // 5 - Z
+                map(Type.BYTE); // 6 - Yaw
+                map(Type.BYTE); // 7 - Pitch
+                map(Type.BYTE); // 8 - Head Pitch
+                map(Type.SHORT); // 9 - Velocity X
+                map(Type.SHORT); // 10 - Velocity Y
+                map(Type.SHORT); // 11 - Velocity Z
+                map(Types1_9.METADATA_LIST); // 12 - Metadata
+
+                // Track entity
+                handler(getTrackerHandler());
+
+                // Rewrite entity type / metadata
+                handler(getMobSpawnRewriter(Types1_9.METADATA_LIST));
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_9_3.SPAWN_PAINTING, Entity1_11Types.EntityType.PAINTING);
+        registerJoinGame(ClientboundPackets1_9_3.JOIN_GAME, Entity1_11Types.EntityType.PLAYER);
+        registerRespawn(ClientboundPackets1_9_3.RESPAWN);
+
+        protocol.registerOutgoing(ClientboundPackets1_9_3.SPAWN_PLAYER, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.UUID); // 1 - Player UUID
+                map(Type.DOUBLE); // 2 - X
+                map(Type.DOUBLE); // 3 - Y
+                map(Type.DOUBLE); // 4 - Z
+                map(Type.BYTE); // 5 - Yaw
+                map(Type.BYTE); // 6 - Pitch
+                map(Types1_9.METADATA_LIST); // 7 - Metadata list
+
+                handler(getTrackerAndMetaHandler(Types1_9.METADATA_LIST, Entity1_11Types.EntityType.PLAYER));
+            }
+        });
+
+        registerEntityDestroy(ClientboundPackets1_9_3.DESTROY_ENTITIES);
+        registerMetadataRewriter(ClientboundPackets1_9_3.ENTITY_METADATA, Types1_9.METADATA_LIST);
+    }
+
+    @Override
+    protected void registerRewrites() {
+        // Handle non-existing firework metadata (index 7 entity id for boosting)
+        registerMetaHandler().filter(Entity1_11Types.EntityType.FIREWORK, 7).removed();
+
+        // Handle non-existing pig metadata (index 14 - boost time)
+        registerMetaHandler().filter(Entity1_11Types.EntityType.PIG, 14).removed();
+    }
+
+    @Override
+    protected EntityType getTypeFromId(int typeId) {
+        return Entity1_11Types.getTypeFromId(typeId, false);
+    }
+
+    @Override
+    protected EntityType getObjectTypeFromId(final int typeId) {
+        return Entity1_11Types.getTypeFromId(typeId, true);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_11to1_11_1/packets/ItemPackets1_11_1.java

@@ -0,0 +1,130 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.packets;
+
+import nl.matsv.viabackwards.api.rewriters.LegacyBlockItemRewriter;
+import nl.matsv.viabackwards.api.rewriters.LegacyEnchantmentRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_11to1_11_1.Protocol1_11To1_11_1;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.rewriters.ItemRewriter;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ClientboundPackets1_9_3;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.ServerboundPackets1_9_3;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ListTag;
+
+public class ItemPackets1_11_1 extends LegacyBlockItemRewriter<Protocol1_11To1_11_1> {
+
+    private LegacyEnchantmentRewriter enchantmentRewriter;
+
+    public ItemPackets1_11_1(Protocol1_11To1_11_1 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        ItemRewriter itemRewriter = new ItemRewriter(protocol, this::handleItemToClient, this::handleItemToServer);
+
+        itemRewriter.registerSetSlot(ClientboundPackets1_9_3.SET_SLOT, Type.ITEM);
+        itemRewriter.registerWindowItems(ClientboundPackets1_9_3.WINDOW_ITEMS, Type.ITEM_ARRAY);
+        itemRewriter.registerEntityEquipment(ClientboundPackets1_9_3.ENTITY_EQUIPMENT, Type.ITEM);
+
+        // Plugin message Packet -> Trading
+        protocol.registerOutgoing(ClientboundPackets1_9_3.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // 0 - Channel
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (wrapper.get(Type.STRING, 0).equalsIgnoreCase("MC|TrList")) {
+                            wrapper.passthrough(Type.INT); // Passthrough Window ID
+
+                            int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                            for (int i = 0; i < size; i++) {
+                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Input Item
+                                wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Output Item
+
+                                boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
+                                if (secondItem) {
+                                    wrapper.write(Type.ITEM, handleItemToClient(wrapper.read(Type.ITEM))); // Second Item
+                                }
+
+                                wrapper.passthrough(Type.BOOLEAN); // Trade disabled
+                                wrapper.passthrough(Type.INT); // Number of tools uses
+                                wrapper.passthrough(Type.INT); // Maximum number of trade uses
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        itemRewriter.registerClickWindow(ServerboundPackets1_9_3.CLICK_WINDOW, Type.ITEM);
+        itemRewriter.registerCreativeInvAction(ServerboundPackets1_9_3.CREATIVE_INVENTORY_ACTION, Type.ITEM);
+
+        // Handle item metadata
+        protocol.getEntityPackets().registerMetaHandler().handle(e -> {
+            Metadata data = e.getData();
+
+            if (data.getMetaType().getType().equals(Type.ITEM)) { // Is Item
+                data.setValue(handleItemToClient((Item) data.getValue()));
+            }
+
+            return data;
+        });
+    }
+
+    @Override
+    protected void registerRewrites() {
+        enchantmentRewriter = new LegacyEnchantmentRewriter(nbtTagName);
+        enchantmentRewriter.registerEnchantment(22, "§7Sweeping Edge");
+    }
+
+    @Override
+    public Item handleItemToClient(final Item item) {
+        if (item == null) return null;
+        super.handleItemToClient(item);
+
+        CompoundTag tag = item.getTag();
+        if (tag == null) return item;
+
+        if (tag.get("ench") instanceof ListTag) {
+            enchantmentRewriter.rewriteEnchantmentsToClient(tag, false);
+        }
+        if (tag.get("StoredEnchantments") instanceof ListTag) {
+            enchantmentRewriter.rewriteEnchantmentsToClient(tag, true);
+        }
+        return item;
+    }
+
+    @Override
+    public Item handleItemToServer(final Item item) {
+        if (item == null) return null;
+        super.handleItemToServer(item);
+
+        CompoundTag tag = item.getTag();
+        if (tag == null) return item;
+
+        if (tag.contains(nbtTagName + "|ench")) {
+            enchantmentRewriter.rewriteEnchantmentsToServer(tag, false);
+        }
+        if (tag.contains(nbtTagName + "|StoredEnchantments")) {
+            enchantmentRewriter.rewriteEnchantmentsToServer(tag, true);
+        }
+        return item;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_1to1_12_2/KeepAliveTracker.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_1to1_12_2;
+
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+public class KeepAliveTracker extends StoredObject {
+    private long keepAlive = Integer.MAX_VALUE;
+
+    public KeepAliveTracker(UserConnection user) {
+        super(user);
+    }
+
+    public long getKeepAlive() {
+        return keepAlive;
+    }
+
+    public void setKeepAlive(long keepAlive) {
+        this.keepAlive = keepAlive;
+    }
+
+    @Override
+    public String toString() {
+        return "KeepAliveTracker{" + "keepAlive=" + keepAlive + '}';
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_1to1_12_2/Protocol1_12_1To1_12_2.java

@@ -0,0 +1,69 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_1to1_12_2;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ClientboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ServerboundPackets1_12_1;
+
+public class Protocol1_12_1To1_12_2 extends BackwardsProtocol<ClientboundPackets1_12_1, ClientboundPackets1_12_1, ServerboundPackets1_12_1, ServerboundPackets1_12_1> {
+
+    public Protocol1_12_1To1_12_2() {
+        super(ClientboundPackets1_12_1.class, ClientboundPackets1_12_1.class, ServerboundPackets1_12_1.class, ServerboundPackets1_12_1.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        registerOutgoing(ClientboundPackets1_12_1.KEEP_ALIVE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper packetWrapper) throws Exception {
+                        Long keepAlive = packetWrapper.read(Type.LONG);
+                        packetWrapper.user().get(KeepAliveTracker.class).setKeepAlive(keepAlive);
+                        packetWrapper.write(Type.VAR_INT, keepAlive.hashCode());
+                    }
+                });
+            }
+        });
+
+        registerIncoming(ServerboundPackets1_12_1.KEEP_ALIVE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper packetWrapper) throws Exception {
+                        int keepAlive = packetWrapper.read(Type.VAR_INT);
+                        long realKeepAlive = packetWrapper.user().get(KeepAliveTracker.class).getKeepAlive();
+                        if (keepAlive != Long.hashCode(realKeepAlive)) {
+                            packetWrapper.cancel(); // Wrong data, cancel packet
+                            return;
+                        }
+                        packetWrapper.write(Type.LONG, realKeepAlive);
+                        // Reset KeepAliveTracker (to prevent sending same valid value in a row causing a timeout)
+                        packetWrapper.user().get(KeepAliveTracker.class).setKeepAlive(Integer.MAX_VALUE);
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    public void init(UserConnection userConnection) {
+        userConnection.put(new KeepAliveTracker(userConnection));
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/Protocol1_12_2To1_13.java

@@ -0,0 +1,126 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software withregisterOutgoing restriction, including withregisterOutgoing limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHregisterOutgoing WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, registerOutgoing OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.api.rewriters.TranslatableRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.BackwardsMappings;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.PaintingMapping;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets.BlockItemPackets1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets.EntityPackets1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets.PlayerPacket1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets.SoundPackets1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.BackwardsBlockStorage;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.PlayerPositionStorage1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.TabCompleteStorage;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ClientboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ServerboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.Protocol1_13To1_12_2;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+import us.myles.viaversion.libs.gson.JsonObject;
+
+public class Protocol1_12_2To1_13 extends BackwardsProtocol<ClientboundPackets1_13, ClientboundPackets1_12_1, ServerboundPackets1_13, ServerboundPackets1_12_1> {
+
+    public static final BackwardsMappings MAPPINGS = new BackwardsMappings();
+    private BlockItemPackets1_13 blockItemPackets;
+
+    public Protocol1_12_2To1_13() {
+        super(ClientboundPackets1_13.class, ClientboundPackets1_12_1.class, ServerboundPackets1_13.class, ServerboundPackets1_12_1.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        executeAsyncAfterLoaded(Protocol1_13To1_12_2.class, () -> {
+            MAPPINGS.load();
+            PaintingMapping.init();
+            Via.getManager().getProviders().register(BackwardsBlockEntityProvider.class, new BackwardsBlockEntityProvider());
+        });
+
+        TranslatableRewriter translatableRewriter = new TranslatableRewriter(this) {
+            @Override
+            protected void handleTranslate(JsonObject root, String translate) {
+                String newTranslate = newTranslatables.get(translate);
+                if (newTranslate != null || (newTranslate = getMappingData().getTranslateMappings().get(translate)) != null) {
+                    root.addProperty("translate", newTranslate);
+                }
+            }
+        };
+        translatableRewriter.registerPing();
+        translatableRewriter.registerBossBar(ClientboundPackets1_13.BOSSBAR);
+        translatableRewriter.registerChatMessage(ClientboundPackets1_13.CHAT_MESSAGE);
+        translatableRewriter.registerLegacyOpenWindow(ClientboundPackets1_13.OPEN_WINDOW);
+        translatableRewriter.registerDisconnect(ClientboundPackets1_13.DISCONNECT);
+        translatableRewriter.registerCombatEvent(ClientboundPackets1_13.COMBAT_EVENT);
+        translatableRewriter.registerTitle(ClientboundPackets1_13.TITLE);
+        translatableRewriter.registerTabList(ClientboundPackets1_13.TAB_LIST);
+
+        (blockItemPackets = new BlockItemPackets1_13(this)).register();
+        new EntityPackets1_13(this).register();
+        new PlayerPacket1_13(this).register();
+        new SoundPackets1_13(this).register();
+
+        cancelOutgoing(ClientboundPackets1_13.DECLARE_COMMANDS); //TODO
+        cancelOutgoing(ClientboundPackets1_13.NBT_QUERY);
+        cancelOutgoing(ClientboundPackets1_13.CRAFT_RECIPE_RESPONSE);
+        cancelOutgoing(ClientboundPackets1_13.UNLOCK_RECIPES);
+        cancelOutgoing(ClientboundPackets1_13.ADVANCEMENTS);
+        cancelOutgoing(ClientboundPackets1_13.DECLARE_RECIPES);
+        cancelOutgoing(ClientboundPackets1_13.TAGS);
+
+        cancelIncoming(ServerboundPackets1_12_1.CRAFT_RECIPE_REQUEST);
+        cancelIncoming(ServerboundPackets1_12_1.RECIPE_BOOK_DATA);
+    }
+
+    @Override
+    public void init(UserConnection user) {
+        // Register ClientWorld
+        if (!user.has(ClientWorld.class)) {
+            user.put(new ClientWorld(user));
+        }
+
+        // Register EntityTracker if it doesn't exist yet.
+        if (!user.has(EntityTracker.class)) {
+            user.put(new EntityTracker(user));
+        }
+
+        // Init protocol in EntityTracker
+        user.get(EntityTracker.class).initProtocol(this);
+
+        // Register Block Storage
+        if (!user.has(BackwardsBlockStorage.class)) {
+            user.put(new BackwardsBlockStorage(user));
+        }
+        // Register Block Storage
+        if (!user.has(TabCompleteStorage.class)) {
+            user.put(new TabCompleteStorage(user));
+        }
+
+        if (ViaBackwards.getConfig().isFix1_13FacePlayer() && !user.has(PlayerPositionStorage1_13.class)) {
+            user.put(new PlayerPositionStorage1_13(user));
+        }
+    }
+
+    public BlockItemPackets1_13 getBlockItemPackets() {
+        return blockItemPackets;
+    }
+
+    @Override
+    public BackwardsMappings getMappingData() {
+        return MAPPINGS;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/BannerHandler.java

@@ -0,0 +1,56 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider.BackwardsBlockEntityHandler;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ListTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+public class BannerHandler implements BackwardsBlockEntityHandler {
+    private static final int WALL_BANNER_START = 7110; // 4 each
+    private static final int WALL_BANNER_STOP = 7173;
+
+    private static final int BANNER_START = 6854; // 16 each
+    private static final int BANNER_STOP = 7109;
+
+    @Override
+    public CompoundTag transform(UserConnection user, int blockId, CompoundTag tag) {
+        // Normal banners
+        if (blockId >= BANNER_START && blockId <= BANNER_STOP) {
+            int color = (blockId - BANNER_START) >> 4;
+            tag.put(new IntTag("Base", (15 - color)));
+        }
+        // Wall banners
+        else if (blockId >= WALL_BANNER_START && blockId <= WALL_BANNER_STOP) {
+            int color = (blockId - WALL_BANNER_START) >> 2;
+            tag.put(new IntTag("Base", (15 - color)));
+        } else {
+            ViaBackwards.getPlatform().getLogger().warning("Why does this block have the banner block entity? :(" + tag);
+        }
+
+        // Invert colors
+        Tag patternsTag = tag.get("Patterns");
+        if (patternsTag instanceof ListTag) {
+            for (Tag pattern : (ListTag) patternsTag) {
+                if (!(pattern instanceof CompoundTag)) continue;
+
+                IntTag c = ((CompoundTag) pattern).get("Color");
+                c.setValue(15 - c.getValue()); // Invert color id
+            }
+        }
+
+        return tag;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/BedHandler.java

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers;
+
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+
+public class BedHandler implements BackwardsBlockEntityProvider.BackwardsBlockEntityHandler {
+
+    @Override
+    public CompoundTag transform(UserConnection user, int blockId, CompoundTag tag) {
+        int offset = blockId - 748;
+        int color = offset >> 4;
+
+        tag.put(new IntTag("color", color));
+
+        return tag;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/FlowerPotHandler.java

@@ -0,0 +1,76 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers;
+
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider;
+import us.myles.ViaVersion.api.Pair;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+
+public class FlowerPotHandler implements BackwardsBlockEntityProvider.BackwardsBlockEntityHandler {
+
+    private static final Int2ObjectMap<Pair<String, Byte>> FLOWERS = new Int2ObjectOpenHashMap<>(22, 1F);
+    private static final Pair<String, Byte> AIR = new Pair<>("minecraft:air", (byte) 0);
+
+    static {
+        FLOWERS.put(5265, AIR);
+        register(5266, "minecraft:sapling", (byte) 0);
+        register(5267, "minecraft:sapling", (byte) 1);
+        register(5268, "minecraft:sapling", (byte) 2);
+        register(5269, "minecraft:sapling", (byte) 3);
+        register(5270, "minecraft:sapling", (byte) 4);
+        register(5271, "minecraft:sapling", (byte) 5);
+        register(5272, "minecraft:tallgrass", (byte) 2);
+        register(5273, "minecraft:yellow_flower", (byte) 0);
+        register(5274, "minecraft:red_flower", (byte) 0);
+        register(5275, "minecraft:red_flower", (byte) 1);
+        register(5276, "minecraft:red_flower", (byte) 2);
+        register(5277, "minecraft:red_flower", (byte) 3);
+        register(5278, "minecraft:red_flower", (byte) 4);
+        register(5279, "minecraft:red_flower", (byte) 5);
+        register(5280, "minecraft:red_flower", (byte) 6);
+        register(5281, "minecraft:red_flower", (byte) 7);
+        register(5282, "minecraft:red_flower", (byte) 8);
+        register(5283, "minecraft:red_mushroom", (byte) 0);
+        register(5284, "minecraft:brown_mushroom", (byte) 0);
+        register(5285, "minecraft:deadbush", (byte) 0);
+        register(5286, "minecraft:cactus", (byte) 0);
+    }
+
+    private static void register(int id, String identifier, byte data) {
+        FLOWERS.put(id, new Pair<>(identifier, data));
+    }
+
+    public static boolean isFlowah(int id) {
+        return id >= 5265 && id <= 5286;
+    }
+
+    public Pair<String, Byte> getOrDefault(int blockId) {
+        Pair<String, Byte> pair = FLOWERS.get(blockId);
+        return pair != null ? pair : AIR;
+    }
+
+    // TODO THIS IS NEVER CALLED BECAUSE ITS NO LONGER A BLOCK ENTITY :(
+    @Override
+    public CompoundTag transform(UserConnection user, int blockId, CompoundTag tag) {
+        Pair<String, Byte> item = getOrDefault(blockId);
+
+        tag.put(new StringTag("Item", item.getKey()));
+        tag.put(new IntTag("Data", item.getValue()));
+
+        return tag;
+    }
+
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/PistonHandler.java

@@ -0,0 +1,102 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers;
+
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.Protocol1_12_2To1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.MappingDataLoader;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.blockconnections.ConnectionData;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.StringJoiner;
+
+public class PistonHandler implements BackwardsBlockEntityProvider.BackwardsBlockEntityHandler {
+
+    private final Map<String, Integer> pistonIds = new HashMap<>();
+
+    public PistonHandler() {
+        if (Via.getConfig().isServersideBlockConnections()) {
+            Map<String, Integer> keyToId;
+            try {
+                Field field = ConnectionData.class.getDeclaredField("keyToId");
+                field.setAccessible(true);
+                keyToId = (Map<String, Integer>) field.get(null);
+            } catch (IllegalAccessException | NoSuchFieldException e) {
+                e.printStackTrace();
+                return;
+            }
+
+            for (Map.Entry<String, Integer> entry : keyToId.entrySet()) {
+                if (!entry.getKey().contains("piston")) continue;
+
+                addEntries(entry.getKey(), entry.getValue());
+            }
+        } else {
+            JsonObject mappings = MappingDataLoader.getMappingsCache().get("mapping-1.13.json").getAsJsonObject("blockstates");
+            for (Map.Entry<String, JsonElement> blockState : mappings.entrySet()) {
+                String key = blockState.getValue().getAsString();
+                if (!key.contains("piston")) continue;
+
+                addEntries(key, Integer.parseInt(blockState.getKey()));
+            }
+        }
+    }
+
+    // There doesn't seem to be a nicer way around it :(
+    private void addEntries(String data, int id) {
+        id = Protocol1_12_2To1_13.MAPPINGS.getNewBlockStateId(id);
+        pistonIds.put(data, id);
+
+        String substring = data.substring(10);
+        if (!substring.startsWith("piston") && !substring.startsWith("sticky_piston")) return;
+
+        // Swap properties and add them to the map
+        String[] split = data.substring(0, data.length() - 1).split("\\[");
+        String[] properties = split[1].split(",");
+        data = split[0] + "[" + properties[1] + "," + properties[0] + "]";
+        pistonIds.put(data, id);
+    }
+
+    @Override
+    public CompoundTag transform(UserConnection user, int blockId, CompoundTag tag) {
+        CompoundTag blockState = tag.get("blockState");
+        if (blockState == null) return tag;
+
+        String dataFromTag = getDataFromTag(blockState);
+        if (dataFromTag == null) return tag;
+
+        Integer id = pistonIds.get(dataFromTag);
+        if (id == null) {
+            //TODO see why this could be null and if this is bad
+            return tag;
+        }
+
+        tag.put(new IntTag("blockId", id >> 4));
+        tag.put(new IntTag("blockData", id & 15));
+        return tag;
+    }
+
+    // The type hasn't actually been updated in the blockstorage, so we need to construct it
+    private String getDataFromTag(CompoundTag tag) {
+        StringTag name = tag.get("Name");
+        if (name == null) return null;
+
+        CompoundTag properties = tag.get("Properties");
+        if (properties == null) return name.getValue();
+
+        StringJoiner joiner = new StringJoiner(",", name.getValue() + "[", "]");
+        for (Tag property : properties) {
+            if (!(property instanceof StringTag)) continue;
+            joiner.add(property.getName() + "=" + ((StringTag) property).getValue());
+        }
+        return joiner.toString();
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/SkullHandler.java

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers;
+
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider.BackwardsBlockEntityHandler;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.viaversion.libs.opennbt.tag.builtin.ByteTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+
+public class SkullHandler implements BackwardsBlockEntityHandler {
+    private static final int SKULL_START = 5447;
+
+    @Override
+    public CompoundTag transform(UserConnection user, int blockId, CompoundTag tag) {
+        int diff = blockId - SKULL_START;
+        int pos = diff % 20;
+        byte type = (byte) Math.floor(diff / 20f);
+
+        // Set type
+        tag.put(new ByteTag("SkullType", type));
+
+        // Remove wall skulls
+        if (pos < 4) {
+            return tag;
+        }
+
+        // Add rotation for normal skulls
+        tag.put(new ByteTag("Rot", (byte) ((pos - 4) & 255)));
+
+        return tag;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/block_entity_handlers/SpawnerHandler.java

@@ -0,0 +1,35 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers;
+
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.EntityNameRewrites;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers.BackwardsBlockEntityProvider;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.Tag;
+
+public class SpawnerHandler implements BackwardsBlockEntityProvider.BackwardsBlockEntityHandler {
+
+    @Override
+    public CompoundTag transform(UserConnection user, int blockId, CompoundTag tag) {
+        Tag dataTag = tag.get("SpawnData");
+        if (dataTag instanceof CompoundTag) {
+            CompoundTag data = (CompoundTag) dataTag;
+            Tag idTag = data.get("id");
+            if (idTag instanceof StringTag) {
+                StringTag s = (StringTag) idTag;
+                s.setValue(EntityNameRewrites.rewrite(s.getValue()));
+            }
+        }
+        return tag;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/data/BackwardsMappings.java

@@ -0,0 +1,119 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.data.VBMappings;
+import org.jetbrains.annotations.Nullable;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.MappingDataLoader;
+import us.myles.ViaVersion.api.data.Mappings;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.Protocol1_13To1_12_2;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data.StatisticMappings;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+import us.myles.viaversion.libs.fastutil.objects.Object2IntMap;
+import us.myles.viaversion.libs.gson.JsonElement;
+import us.myles.viaversion.libs.gson.JsonObject;
+import us.myles.viaversion.libs.gson.JsonPrimitive;
+
+import java.util.Arrays;
+import java.util.HashMap;
+import java.util.Map;
+
+public class BackwardsMappings extends nl.matsv.viabackwards.api.data.BackwardsMappings {
+    private final Int2ObjectMap<String> statisticMappings = new Int2ObjectOpenHashMap<>();
+    private final Map<String, String> translateMappings = new HashMap<>();
+    private Mappings enchantmentMappings;
+
+    public BackwardsMappings() {
+        super("1.13", "1.12", Protocol1_13To1_12_2.class, true);
+    }
+
+    @Override
+    public void loadVBExtras(JsonObject oldMappings, JsonObject newMappings) {
+        enchantmentMappings = new VBMappings(oldMappings.getAsJsonObject("enchantments"), newMappings.getAsJsonObject("enchantments"), false);
+        for (Map.Entry<String, Integer> entry : StatisticMappings.CUSTOM_STATS.entrySet()) {
+            statisticMappings.put(entry.getValue().intValue(), entry.getKey());
+        }
+        for (Map.Entry<String, String> entry : Protocol1_13To1_12_2.MAPPINGS.getTranslateMapping().entrySet()) {
+            translateMappings.put(entry.getValue(), entry.getKey());
+        }
+    }
+
+    // Has lots of compat layers, so we can't use the default Via method
+    private static void mapIdentifiers(short[] output, JsonObject newIdentifiers, JsonObject oldIdentifiers, JsonObject mapping) {
+        Object2IntMap newIdentifierMap = MappingDataLoader.indexedObjectToMap(oldIdentifiers);
+        for (Map.Entry<String, JsonElement> entry : newIdentifiers.entrySet()) {
+            String key = entry.getValue().getAsString();
+            int value = newIdentifierMap.getInt(key);
+            short hardId = -1;
+            if (value == -1) {
+                JsonPrimitive replacement = mapping.getAsJsonPrimitive(key);
+                int propertyIndex;
+                if (replacement == null && (propertyIndex = key.indexOf('[')) != -1) {
+                    replacement = mapping.getAsJsonPrimitive(key.substring(0, propertyIndex));
+                }
+                if (replacement != null) {
+                    if (replacement.getAsString().startsWith("id:")) {
+                        String id = replacement.getAsString().replace("id:", "");
+                        hardId = Short.parseShort(id);
+                        value = newIdentifierMap.getInt(oldIdentifiers.getAsJsonPrimitive(id).getAsString());
+                    } else {
+                        value = newIdentifierMap.getInt(replacement.getAsString());
+                    }
+                }
+                if (value == -1) {
+                    if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                        if (replacement != null) {
+                            ViaBackwards.getPlatform().getLogger().warning("No key for " + entry.getValue() + "/" + replacement.getAsString() + " :( ");
+                        } else {
+                            ViaBackwards.getPlatform().getLogger().warning("No key for " + entry.getValue() + " :( ");
+                        }
+                    }
+                    continue;
+                }
+            }
+            output[Integer.parseInt(entry.getKey())] = hardId != -1 ? hardId : (short) value;
+        }
+    }
+
+    @Override
+    @Nullable
+    protected Mappings loadFromObject(JsonObject oldMappings, JsonObject newMappings, @Nullable JsonObject diffMappings, String key) {
+        if (key.equals("blockstates")) {
+            short[] oldToNew = new short[8582];
+            Arrays.fill(oldToNew, (short) -1);
+            mapIdentifiers(oldToNew, oldMappings.getAsJsonObject("blockstates"), newMappings.getAsJsonObject("blocks"), diffMappings.getAsJsonObject("blockstates"));
+            return new Mappings(oldToNew);
+        } else {
+            return super.loadFromObject(oldMappings, newMappings, diffMappings, key);
+        }
+    }
+
+    @Override
+    protected int checkValidity(int id, int mappedId, String type) {
+        // Don't warn for missing ids here
+        return mappedId;
+    }
+
+    public Int2ObjectMap<String> getStatisticMappings() {
+        return statisticMappings;
+    }
+
+    public Map<String, String> getTranslateMappings() {
+        return translateMappings;
+    }
+
+    public Mappings getEnchantmentMappings() {
+        return enchantmentMappings;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/data/EntityNameRewrites.java

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class EntityNameRewrites {
+    private static final Map<String, String> ENTITY_NAMES = new HashMap<>();
+
+    static {
+        // CHANGED NAMES IN 1.13
+        reg("commandblock_minecart", "command_block_minecart");
+        reg("ender_crystal", "end_crystal");
+        reg("evocation_fangs", "evoker_fangs");
+        reg("evocation_illager", "evoker");
+        reg("eye_of_ender_signal", "eye_of_ender");
+        reg("fireworks_rocket", "firework_rocket");
+        reg("illusion_illager", "illusioner");
+        reg("snowman", "snow_golem");
+        reg("villager_golem", "iron_golem");
+        reg("vindication_illager", "vindicator");
+        reg("xp_bottle", "experience_bottle");
+        reg("xp_orb", "experience_orb");
+    }
+
+
+    private static void reg(String past, String future) {
+        ENTITY_NAMES.put("minecraft:" + future, "minecraft:" + past);
+    }
+
+    public static String rewrite(String entName) {
+        String entityName = ENTITY_NAMES.get(entName);
+        if (entityName != null) {
+            return entityName;
+        }
+        entityName = ENTITY_NAMES.get("minecraft:" + entName);
+        if (entityName != null) {
+            return entityName;
+        } else
+            return entName;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/data/EntityTypeMapping.java

@@ -0,0 +1,29 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data;
+
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data.EntityTypeRewriter;
+import us.myles.viaversion.libs.fastutil.ints.Int2IntMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2IntOpenHashMap;
+
+import java.lang.reflect.Field;
+
+public class EntityTypeMapping {
+    private static final Int2IntMap TYPES = new Int2IntOpenHashMap();
+
+    static {
+        TYPES.defaultReturnValue(-1);
+        try {
+            Field field = EntityTypeRewriter.class.getDeclaredField("ENTITY_TYPES");
+            field.setAccessible(true);
+            Int2IntMap entityTypes = (Int2IntMap) field.get(null);
+            for (Int2IntMap.Entry entry : entityTypes.int2IntEntrySet()) {
+                EntityTypeMapping.TYPES.put(entry.getIntValue(), entry.getIntKey());
+            }
+        } catch (NoSuchFieldException | IllegalAccessException ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    public static int getOldId(int type1_13) {
+        return TYPES.get(type1_13);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/data/NamedSoundMapping.java

@@ -0,0 +1,26 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data;
+
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.data.NamedSoundRewriter;
+
+import java.lang.reflect.Field;
+import java.util.HashMap;
+import java.util.Map;
+
+public class NamedSoundMapping {
+    private static final Map<String, String> SOUNDS = new HashMap<>();
+
+    static {
+        try {
+            Field field = NamedSoundRewriter.class.getDeclaredField("oldToNew");
+            field.setAccessible(true);
+            Map<String, String> sounds = (Map<String, String>) field.get(null);
+            sounds.forEach((sound1_12, sound1_13) -> NamedSoundMapping.SOUNDS.put(sound1_13, sound1_12));
+        } catch (NoSuchFieldException | IllegalAccessException ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    public static String getOldId(String sound1_13) {
+        return SOUNDS.get(sound1_13);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/data/PaintingMapping.java

@@ -0,0 +1,45 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data;
+
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectMap;
+import us.myles.viaversion.libs.fastutil.ints.Int2ObjectOpenHashMap;
+
+public class PaintingMapping {
+    private static final Int2ObjectMap<String> PAINTINGS = new Int2ObjectOpenHashMap<>(26, 1F);
+
+    public static void init() {
+        add("Kebab");
+        add("Aztec");
+        add("Alban");
+        add("Aztec2");
+        add("Bomb");
+        add("Plant");
+        add("Wasteland");
+        add("Pool");
+        add("Courbet");
+        add("Sea");
+        add("Sunset");
+        add("Creebet");
+        add("Wanderer");
+        add("Graham");
+        add("Match");
+        add("Bust");
+        add("Stage");
+        add("Void");
+        add("SkullAndRoses");
+        add("Wither");
+        add("Fighters");
+        add("Pointer");
+        add("Pigscene");
+        add("BurningSkull");
+        add("Skeleton");
+        add("DonkeyKong");
+    }
+
+    private static void add(String motive) {
+        PAINTINGS.put(PAINTINGS.size(), motive);
+    }
+
+    public static String getStringId(int id) {
+        return PAINTINGS.getOrDefault(id, "kebab");
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/data/ParticleMapping.java

@@ -0,0 +1,196 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data;
+
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.Protocol1_12_2To1_13;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.Particle;
+
+import java.util.List;
+
+public class ParticleMapping {
+    private static final ParticleData[] particles;
+
+    static {
+        ParticleHandler blockHandler = new ParticleHandler() {
+            @Override
+            public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+                return rewrite(wrapper.read(Type.VAR_INT));
+            }
+
+            @Override
+            public int[] rewrite(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData> data) {
+                return rewrite((int) data.get(0).getValue());
+            }
+
+            private int[] rewrite(int newType) {
+                int blockType = Protocol1_12_2To1_13.MAPPINGS.getNewBlockStateId(newType);
+
+                int type = blockType >> 4;
+                int meta = blockType & 15;
+                return new int[]{type + (meta << 12)};
+            }
+
+            @Override
+            public boolean isBlockHandler() {
+                return true;
+            }
+        };
+
+        particles = new ParticleData[]{
+                rewrite(16), // (0->16)  minecraft:ambient_entity_effect -> mobSpellAmbient
+                rewrite(20), // (1->20)  minecraft:angry_villager -> angryVillager
+                rewrite(35), // (2->35)  minecraft:barrier -> barrier
+                rewrite(37, blockHandler),
+                // (3->37)  minecraft:block -> blockcrack
+                rewrite(4),  // (4->4)   minecraft:bubble -> bubble
+                rewrite(29), // (5->29)  minecraft:cloud -> cloud
+                rewrite(9),  // (6->9)   minecraft:crit -> crit
+                rewrite(44), // (7->44)  minecraft:damage_indicator -> damageIndicator‌
+                rewrite(42), // (8->42)  minecraft:dragon_breath -> dragonbreath
+                rewrite(19), // (9->19)  minecraft:dripping_lava -> dripLava
+                rewrite(18), // (10->18) minecraft:dripping_water -> dripWater
+                rewrite(30, new ParticleHandler() {
+                    @Override
+                    public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+                        float r = wrapper.read(Type.FLOAT);
+                        float g = wrapper.read(Type.FLOAT);
+                        float b = wrapper.read(Type.FLOAT);
+                        float scale = wrapper.read(Type.FLOAT);
+
+                        wrapper.set(Type.FLOAT, 3, r); // 5 - Offset X index=3
+                        wrapper.set(Type.FLOAT, 4, g); // 6 - Offset Y index=4
+                        wrapper.set(Type.FLOAT, 5, b); // 7 - Offset Z index=5
+                        wrapper.set(Type.FLOAT, 6, scale); // 8 - Particle Data index=6
+                        wrapper.set(Type.INT, 1, 0); // 9 - Particle Count index=1 enable rgb particle
+
+                        return null;
+                    }
+
+                    @Override
+                    public int[] rewrite(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData> data) {
+                        return null;
+                    }
+                }),         // (11->30) minecraft:dust -> reddust
+                rewrite(13), // (12->13) minecraft:effect -> spell
+                rewrite(41), // (13->41) minecraft:elder_guardian -> mobappearance
+                rewrite(10), // (14->10) minecraft:enchanted_hit -> magicCrit‌
+                rewrite(25), // (15->25) minecraft:enchant -> enchantmenttable
+                rewrite(43), // (16->43) minecraft:end_rod -> endRod
+                rewrite(15), // (17->15) minecraft:entity_effect -> mobSpell
+                rewrite(2),  // (18->2)  minecraft:explosion_emitter -> hugeexplosion
+                rewrite(1),  // (19->1)  minecraft:explosion -> largeexplode
+                rewrite(46, blockHandler),
+                // (20->46) minecraft:falling_dust -> fallingdust
+                rewrite(3),  // (21->3)  minecraft:firework -> fireworksSpark
+                rewrite(6),  // (22->6)  minecraft:fishing -> wake
+                rewrite(26), // (23->26) minecraft:flame -> flame
+                rewrite(21), // (24->21) minecraft:happy_villager -> happyVillager
+                rewrite(34), // (25->34) minecraft:heart -> heart
+                rewrite(14), // (26->14) minecraft:instant_effect -> instantSpell
+                rewrite(36, new ParticleHandler() {
+                    @Override
+                    public int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+                        return rewrite(protocol, wrapper.read(Type.FLAT_ITEM));
+                    }
+
+                    @Override
+                    public int[] rewrite(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData> data) {
+                        return rewrite(protocol, (Item) data.get(0).getValue());
+                    }
+
+                    private int[] rewrite(Protocol1_12_2To1_13 protocol, Item newItem) {
+                        Item item = protocol.getBlockItemPackets().handleItemToClient(newItem);
+                        return new int[]{item.getIdentifier(), item.getData()};
+                    }
+                }),          // (27->36) minecraft:item -> iconcrack
+                rewrite(33), // (28->33) minecraft:item_slime -> slime
+                rewrite(31), // (29->31) minecraft:item_snowball -> snowballpoof
+                rewrite(12), // (30->12) minecraft:large_smoke -> largesmoke
+                rewrite(27), // (31->27) minecraft:lava -> lava
+                rewrite(22), // (32->22) minecraft:mycelium -> townaura
+                rewrite(23), // (33->23) minecraft:note -> note
+                rewrite(0),  // (34->0)  minecraft:poof -> explode
+                rewrite(24), // (35->24) minecraft:portal -> portal
+                rewrite(39), // (36->39) minecraft:rain -> droplet
+                rewrite(11), // (37->11) minecraft:smoke -> smoke
+                rewrite(48), // (38->48) minecraft:spit -> spit
+                rewrite(12), // (39->-1) minecraft:squid_ink -> squid_ink -> large_smoke
+                rewrite(45), // (40->45) minecraft:sweep_attack -> sweepAttack‌
+                rewrite(47), // (41->47) minecraft:totem_of_undying -> totem
+                rewrite(7),  // (42->7)  minecraft:underwater -> suspended‌
+                rewrite(5),  // (43->5)  minecraft:splash -> splash
+                rewrite(17), // (44->17) minecraft:witch -> witchMagic
+                rewrite(4),  // (45->4)  minecraft:bubble_pop -> bubble
+                rewrite(4),  // (46->4)  minecraft:current_down -> bubble
+                rewrite(4),  // (47->4)  minecraft:bubble_column_up -> bubble
+                rewrite(18), // (48->-1) minecraft:nautilus -> nautilus -> dripWater
+                rewrite(18), // (49->18) minecraft:dolphin -> dripWater
+        };
+    }
+
+    public static ParticleData getMapping(int id) {
+        return particles[id];
+    }
+
+    private static ParticleData rewrite(int replacementId) {
+        return new ParticleData(replacementId);
+    }
+
+    private static ParticleData rewrite(int replacementId, ParticleHandler handler) {
+        return new ParticleData(replacementId, handler);
+    }
+
+    public interface ParticleHandler {
+
+        int[] rewrite(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception;
+
+        int[] rewrite(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData> data);
+
+        default boolean isBlockHandler() {
+            return false;
+        }
+    }
+
+    public static final class ParticleData {
+        private final int historyId;
+        private final ParticleHandler handler;
+
+        private ParticleData(int historyId, ParticleHandler handler) {
+            this.historyId = historyId;
+            this.handler = handler;
+        }
+
+        private ParticleData(int historyId) {
+            this(historyId, null);
+        }
+
+        public int[] rewriteData(Protocol1_12_2To1_13 protocol, PacketWrapper wrapper) throws Exception {
+            if (handler == null) return null;
+            return handler.rewrite(protocol, wrapper);
+        }
+
+        public int[] rewriteMeta(Protocol1_12_2To1_13 protocol, List<Particle.ParticleData> data) {
+            if (handler == null) return null;
+            return handler.rewrite(protocol, data);
+        }
+
+        public int getHistoryId() {
+            return historyId;
+        }
+
+        public ParticleHandler getHandler() {
+            return handler;
+        }
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/packets/EntityPackets1_13.java

@@ -0,0 +1,416 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.entities.storage.EntityPositionHandler;
+import nl.matsv.viabackwards.api.exceptions.RemovedValueException;
+import nl.matsv.viabackwards.api.rewriters.LegacyEntityRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.Protocol1_12_2To1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.EntityTypeMapping;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.PaintingMapping;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.ParticleMapping;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.BackwardsBlockStorage;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.PlayerPositionStorage1_13;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.entities.Entity1_13Types;
+import us.myles.ViaVersion.api.entities.EntityType;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_12;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.Particle;
+import us.myles.ViaVersion.api.type.types.version.Types1_12;
+import us.myles.ViaVersion.api.type.types.version.Types1_13;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ServerboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+
+import java.util.Optional;
+
+public class EntityPackets1_13 extends LegacyEntityRewriter<Protocol1_12_2To1_13> {
+
+    public EntityPackets1_13(Protocol1_12_2To1_13 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_13.PLAYER_POSITION, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.FLOAT);
+                map(Type.FLOAT);
+                map(Type.BYTE);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        if (!ViaBackwards.getConfig().isFix1_13FacePlayer()) return;
+
+                        PlayerPositionStorage1_13 playerStorage = wrapper.user().get(PlayerPositionStorage1_13.class);
+                        byte bitField = wrapper.get(Type.BYTE, 0);
+                        playerStorage.setX(toSet(bitField, 0, playerStorage.getX(), wrapper.get(Type.DOUBLE, 0)));
+                        playerStorage.setY(toSet(bitField, 1, playerStorage.getY(), wrapper.get(Type.DOUBLE, 1)));
+                        playerStorage.setZ(toSet(bitField, 2, playerStorage.getZ(), wrapper.get(Type.DOUBLE, 2)));
+                    }
+
+                    private double toSet(int field, int bitIndex, double origin, double packetValue) {
+                        // If bit is set, coordinate is relative
+                        return (field & (1 << bitIndex)) != 0 ? origin + packetValue : packetValue;
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_ENTITY, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                map(Type.UUID);
+                map(Type.BYTE);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.BYTE);
+                map(Type.BYTE);
+                map(Type.INT);
+
+                handler(getObjectTrackerHandler());
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        Optional<Entity1_13Types.ObjectType> optionalType = Entity1_13Types.ObjectType.findById(wrapper.get(Type.BYTE, 0));
+                        if (!optionalType.isPresent()) return;
+
+                        Entity1_13Types.ObjectType type = optionalType.get();
+                        if (type == Entity1_13Types.ObjectType.FALLING_BLOCK) {
+                            int blockState = wrapper.get(Type.INT, 0);
+                            int combined = Protocol1_12_2To1_13.MAPPINGS.getNewBlockStateId(blockState);
+                            combined = ((combined >> 4) & 0xFFF) | ((combined & 0xF) << 12);
+                            wrapper.set(Type.INT, 0, combined);
+                        } else if (type == Entity1_13Types.ObjectType.ITEM_FRAME) {
+                            int data = wrapper.get(Type.INT, 0);
+                            switch (data) {
+                                case 3:
+                                    data = 0;
+                                    break;
+                                case 4:
+                                    data = 1;
+                                    break;
+                                case 5:
+                                    data = 3;
+                                    break;
+                            }
+                            wrapper.set(Type.INT, 0, data);
+                        } else if (type == Entity1_13Types.ObjectType.TRIDENT) {
+                            wrapper.set(Type.BYTE, 0, (byte) Entity1_13Types.ObjectType.TIPPED_ARROW.getId());
+                        }
+                    }
+                });
+            }
+        });
+
+        registerExtraTracker(ClientboundPackets1_13.SPAWN_EXPERIENCE_ORB, Entity1_13Types.EntityType.EXPERIENCE_ORB);
+        registerExtraTracker(ClientboundPackets1_13.SPAWN_GLOBAL_ENTITY, Entity1_13Types.EntityType.LIGHTNING_BOLT);
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                map(Type.UUID);
+                map(Type.VAR_INT);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.BYTE);
+                map(Type.BYTE);
+                map(Type.BYTE);
+                map(Type.SHORT);
+                map(Type.SHORT);
+                map(Type.SHORT);
+                map(Types1_13.METADATA_LIST, Types1_12.METADATA_LIST);
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int type = wrapper.get(Type.VAR_INT, 1);
+                        EntityType entityType = Entity1_13Types.getTypeFromId(type, false);
+                        addTrackedEntity(wrapper, wrapper.get(Type.VAR_INT, 0), entityType);
+
+                        int oldId = EntityTypeMapping.getOldId(type);
+                        if (oldId == -1) {
+                            if (!hasData(entityType)) {
+                                ViaBackwards.getPlatform().getLogger().warning("Could not find 1.12 entity type for 1.13 entity type " + type + "/" + entityType);
+                            }
+                        } else {
+                            wrapper.set(Type.VAR_INT, 1, oldId);
+                        }
+                    }
+                });
+
+                // Rewrite entity type / metadata
+                handler(getMobSpawnRewriter(Types1_12.METADATA_LIST));
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                map(Type.UUID);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.DOUBLE);
+                map(Type.BYTE);
+                map(Type.BYTE);
+                map(Types1_13.METADATA_LIST, Types1_12.METADATA_LIST);
+
+                handler(getTrackerAndMetaHandler(Types1_12.METADATA_LIST, Entity1_13Types.EntityType.PLAYER));
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PAINTING, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                map(Type.UUID);
+
+                handler(getTrackerHandler(Entity1_13Types.EntityType.PAINTING, Type.VAR_INT));
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int motive = wrapper.read(Type.VAR_INT);
+                        String title = PaintingMapping.getStringId(motive);
+                        wrapper.write(Type.STRING, title);
+                    }
+                });
+            }
+        });
+
+        registerJoinGame(ClientboundPackets1_13.JOIN_GAME, Entity1_13Types.EntityType.PLAYER);
+
+        protocol.registerOutgoing(ClientboundPackets1_13.RESPAWN, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Dimension ID
+
+                handler(getDimensionHandler(0));
+                handler(wrapper -> wrapper.user().get(BackwardsBlockStorage.class).clear());
+            }
+        });
+
+        registerEntityDestroy(ClientboundPackets1_13.DESTROY_ENTITIES);
+        registerMetadataRewriter(ClientboundPackets1_13.ENTITY_METADATA, Types1_13.METADATA_LIST, Types1_12.METADATA_LIST);
+
+        // Face Player (new packet)
+        protocol.registerOutgoing(ClientboundPackets1_13.FACE_PLAYER, null, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.cancel();
+
+                        if (!ViaBackwards.getConfig().isFix1_13FacePlayer()) return;
+
+                        // We will just accept a possible, very minor mismatch between server and client position,
+                        // and will take the server's one in both cases, else we would have to cache all entities' positions.
+                        final int anchor = wrapper.read(Type.VAR_INT); // feet/eyes enum
+                        final double x = wrapper.read(Type.DOUBLE);
+                        final double y = wrapper.read(Type.DOUBLE);
+                        final double z = wrapper.read(Type.DOUBLE);
+
+                        PlayerPositionStorage1_13 positionStorage = wrapper.user().get(PlayerPositionStorage1_13.class);
+
+                        // Send teleport packet to client
+                        PacketWrapper positionAndLook = wrapper.create(0x2F);
+                        positionAndLook.write(Type.DOUBLE, 0D);
+                        positionAndLook.write(Type.DOUBLE, 0D);
+                        positionAndLook.write(Type.DOUBLE, 0D);
+
+                        //TODO properly cache and calculate head position?
+                        EntityPositionHandler.writeFacingDegrees(positionAndLook, positionStorage.getX(),
+                                anchor == 1 ? positionStorage.getY() + 1.62 : positionStorage.getY(),
+                                positionStorage.getZ(), x, y, z);
+
+                        positionAndLook.write(Type.BYTE, (byte) 7); // bitfield, 0=absolute, 1=relative - x,y,z relative, yaw,pitch absolute
+                        positionAndLook.write(Type.VAR_INT, -1);
+                        positionAndLook.send(Protocol1_12_2To1_13.class, true, true);
+                    }
+                });
+            }
+        });
+
+        if (ViaBackwards.getConfig().isFix1_13FacePlayer()) {
+            PacketRemapper movementRemapper = new PacketRemapper() {
+                @Override
+                public void registerMap() {
+                    map(Type.DOUBLE);
+                    map(Type.DOUBLE);
+                    map(Type.DOUBLE);
+                    handler(wrapper -> wrapper.user().get(PlayerPositionStorage1_13.class).setCoordinates(wrapper, false));
+                }
+            };
+            protocol.registerIncoming(ServerboundPackets1_12_1.PLAYER_POSITION, movementRemapper); // Player Position
+            protocol.registerIncoming(ServerboundPackets1_12_1.PLAYER_POSITION_AND_ROTATION, movementRemapper); // Player Position And Look (serverbound)
+            protocol.registerIncoming(ServerboundPackets1_12_1.VEHICLE_MOVE, movementRemapper); // Vehicle Move (serverbound)
+        }
+    }
+
+    @Override
+    protected void registerRewrites() {
+        // Rewrite new Entity 'drowned'
+        mapEntity(Entity1_13Types.EntityType.DROWNED, Entity1_13Types.EntityType.ZOMBIE_VILLAGER).mobName("Drowned");
+
+        // Fishy
+        mapEntity(Entity1_13Types.EntityType.COD, Entity1_13Types.EntityType.SQUID).mobName("Cod");
+        mapEntity(Entity1_13Types.EntityType.SALMON, Entity1_13Types.EntityType.SQUID).mobName("Salmon");
+        mapEntity(Entity1_13Types.EntityType.PUFFERFISH, Entity1_13Types.EntityType.SQUID).mobName("Puffer Fish");
+        mapEntity(Entity1_13Types.EntityType.TROPICAL_FISH, Entity1_13Types.EntityType.SQUID).mobName("Tropical Fish");
+
+        // Phantom
+        mapEntity(Entity1_13Types.EntityType.PHANTOM, Entity1_13Types.EntityType.PARROT).mobName("Phantom").spawnMetadata(storage -> {
+            // The phantom is grey/blue so let's do yellow/blue
+            storage.add(new Metadata(15, MetaType1_12.VarInt, 3));
+        });
+
+        // Dolphin
+        mapEntity(Entity1_13Types.EntityType.DOLPHIN, Entity1_13Types.EntityType.SQUID).mobName("Dolphin");
+
+        // Turtle
+        mapEntity(Entity1_13Types.EntityType.TURTLE, Entity1_13Types.EntityType.OCELOT).mobName("Turtle");
+
+        // Rewrite Meta types
+        registerMetaHandler().handle(e -> {
+            Metadata meta = e.getData();
+            int typeId = meta.getMetaType().getTypeID();
+
+            // Rewrite optional chat to chat
+            if (typeId == 5) {
+                meta.setMetaType(MetaType1_12.String);
+
+                if (meta.getValue() == null) {
+                    meta.setValue("");
+                }
+            }
+
+            // Rewrite items
+            else if (typeId == 6) {
+                meta.setMetaType(MetaType1_12.Slot);
+                Item item = (Item) meta.getValue();
+                meta.setValue(protocol.getBlockItemPackets().handleItemToClient(item));
+            }
+
+            // Discontinue particles
+            else if (typeId == 15) {
+                meta.setMetaType(MetaType1_12.Discontinued);
+            }
+
+            // Rewrite to 1.12 ids
+            else if (typeId > 5) {
+                meta.setMetaType(MetaType1_12.byId(
+                        typeId - 1
+                ));
+            }
+
+            return meta;
+        });
+
+        // Rewrite Custom Name from Chat to String
+        registerMetaHandler().filter(Entity1_13Types.EntityType.ENTITY, true, 2).handle(e -> {
+            Metadata meta = e.getData();
+            String value = meta.getValue().toString();
+            if (value.isEmpty()) return meta;
+            meta.setValue(ChatRewriter.jsonTextToLegacy(value));
+            return meta;
+        });
+
+        // Handle zombie metadata
+        registerMetaHandler().filter(Entity1_13Types.EntityType.ZOMBIE, true, 15).removed();
+        registerMetaHandler().filter(Entity1_13Types.EntityType.ZOMBIE, true).handle(e -> {
+            Metadata meta = e.getData();
+
+            if (meta.getId() > 15) {
+                meta.setId(meta.getId() - 1);
+            }
+
+            return meta;
+        });
+
+        // Handle turtle metadata (Remove them all for now)
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TURTLE, 13).removed(); // Home pos
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TURTLE, 14).removed(); // Has egg
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TURTLE, 15).removed(); // Laying egg
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TURTLE, 16).removed(); // Travel pos
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TURTLE, 17).removed(); // Going home
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TURTLE, 18).removed(); // Traveling
+
+        // Remove additional fish meta
+        registerMetaHandler().filter(Entity1_13Types.EntityType.ABSTRACT_FISHES, true, 12).removed();
+        registerMetaHandler().filter(Entity1_13Types.EntityType.ABSTRACT_FISHES, true, 13).removed();
+
+        // Remove phantom size
+        registerMetaHandler().filter(Entity1_13Types.EntityType.PHANTOM, 12).removed();
+
+        // Remove boat splash timer
+        registerMetaHandler().filter(Entity1_13Types.EntityType.BOAT, 12).removed();
+
+        // Remove Trident special loyalty level
+        registerMetaHandler().filter(Entity1_13Types.EntityType.TRIDENT, 7).removed();
+
+        // Handle new wolf colors
+        registerMetaHandler().filter(Entity1_13Types.EntityType.WOLF, 17).handle(e -> {
+            Metadata meta = e.getData();
+
+            meta.setValue(15 - (int) meta.getValue());
+
+            return meta;
+        });
+
+        // Rewrite AreaEffectCloud
+        registerMetaHandler().filter(Entity1_13Types.EntityType.AREA_EFFECT_CLOUD, 9).handle(e -> {
+            Metadata meta = e.getData();
+            Particle particle = (Particle) meta.getValue();
+
+            ParticleMapping.ParticleData data = ParticleMapping.getMapping(particle.getId());
+
+            int firstArg = 0;
+            int secondArg = 0;
+            int[] particleArgs = data.rewriteMeta(protocol, particle.getArguments());
+            if (particleArgs != null && particleArgs.length != 0) {
+                if (data.getHandler().isBlockHandler() && particleArgs[0] == 0) {
+                    // Air doesn't have a break particle for sub 1.13 clients -> glass pane
+                    particleArgs[0] = 102;
+                }
+
+                firstArg = particleArgs[0];
+                secondArg = particleArgs.length == 2 ? particleArgs[1] : 0;
+            }
+
+            e.createMeta(new Metadata(9, MetaType1_12.VarInt, data.getHistoryId()));
+            e.createMeta(new Metadata(10, MetaType1_12.VarInt, firstArg));
+            e.createMeta(new Metadata(11, MetaType1_12.VarInt, secondArg));
+
+            throw RemovedValueException.EX;
+        });
+    }
+
+    @Override
+    protected EntityType getTypeFromId(int typeId) {
+        return Entity1_13Types.getTypeFromId(typeId, false);
+    }
+
+    @Override
+    protected EntityType getObjectTypeFromId(final int typeId) {
+        return Entity1_13Types.getTypeFromId(typeId, true);
+    }
+
+    @Override
+    public int getOldEntityId(final int newId) {
+        return EntityTypeMapping.getOldId(newId);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/packets/PlayerPacket1_13.java

@@ -0,0 +1,565 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets;
+
+import com.google.common.base.Joiner;
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.rewriters.Rewriter;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.Protocol1_12_2To1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.ParticleMapping;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.TabCompleteStorage;
+import nl.matsv.viabackwards.utils.ChatUtil;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.minecraft.Position;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.remapper.ValueCreator;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.packets.State;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ServerboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ChatRewriter;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.packets.InventoryPackets;
+import us.myles.viaversion.libs.gson.JsonElement;
+
+import java.nio.charset.StandardCharsets;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.UUID;
+import java.util.concurrent.ThreadLocalRandom;
+
+public class PlayerPacket1_13 extends Rewriter<Protocol1_12_2To1_13> {
+
+    public PlayerPacket1_13(Protocol1_12_2To1_13 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        // Login Plugin Request
+        protocol.registerOutgoing(State.LOGIN, 0x04, -1, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper packetWrapper) throws Exception {
+                        packetWrapper.cancel();
+                        packetWrapper.create(0x02, new ValueCreator() { // Plugin response
+                            @Override
+                            public void write(PacketWrapper newWrapper) throws Exception {
+                                newWrapper.write(Type.VAR_INT, packetWrapper.read(Type.VAR_INT)); // Packet id
+                                newWrapper.write(Type.BOOLEAN, false); // Success
+                            }
+                        }).sendToServer(Protocol1_12_2To1_13.class);
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        String channel = wrapper.read(Type.STRING);
+                        if (channel.equals("minecraft:trader_list")) {
+                            wrapper.write(Type.STRING, "MC|TrList");
+                            wrapper.passthrough(Type.INT); //Passthrough Window ID
+
+                            int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                            for (int i = 0; i < size; i++) {
+                                //Input Item
+                                Item input = wrapper.read(Type.FLAT_ITEM);
+                                wrapper.write(Type.ITEM, getProtocol().getBlockItemPackets().handleItemToClient(input));
+                                //Output Item
+                                Item output = wrapper.read(Type.FLAT_ITEM);
+                                wrapper.write(Type.ITEM, getProtocol().getBlockItemPackets().handleItemToClient(output));
+
+                                boolean secondItem = wrapper.passthrough(Type.BOOLEAN); //Has second item
+                                if (secondItem) {
+                                    //Second Item
+                                    Item second = wrapper.read(Type.FLAT_ITEM);
+                                    wrapper.write(Type.ITEM, getProtocol().getBlockItemPackets().handleItemToClient(second));
+                                }
+
+                                wrapper.passthrough(Type.BOOLEAN); //Trade disabled
+                                wrapper.passthrough(Type.INT); //Number of tools uses
+                                wrapper.passthrough(Type.INT); //Maximum number of trade uses
+                            }
+                        } else {
+                            String oldChannel = InventoryPackets.getOldPluginChannelId(channel);
+                            if (oldChannel == null) {
+                                if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                                    ViaBackwards.getPlatform().getLogger().warning("Ignoring outgoing plugin message with channel: " + channel);
+                                }
+                                wrapper.cancel();
+                                return;
+                            }
+                            wrapper.write(Type.STRING, oldChannel);
+
+                            if (oldChannel.equals("REGISTER") || oldChannel.equals("UNREGISTER")) {
+                                String[] channels = new String(wrapper.read(Type.REMAINING_BYTES), StandardCharsets.UTF_8).split("\0");
+                                List<String> rewrittenChannels = new ArrayList<>();
+                                for (String s : channels) {
+                                    String rewritten = InventoryPackets.getOldPluginChannelId(s);
+                                    if (rewritten != null) {
+                                        rewrittenChannels.add(rewritten);
+                                    } else if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                                        ViaBackwards.getPlatform().getLogger().warning("Ignoring plugin channel in outgoing REGISTER: " + s);
+                                    }
+                                }
+                                wrapper.write(Type.REMAINING_BYTES, Joiner.on('\0').join(rewrittenChannels).getBytes(StandardCharsets.UTF_8));
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PARTICLE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT);      // 0 - Particle ID
+                map(Type.BOOLEAN);  // 1 - Long Distance
+                map(Type.FLOAT);    // 2 - X
+                map(Type.FLOAT);    // 3 - Y
+                map(Type.FLOAT);    // 4 - Z
+                map(Type.FLOAT);    // 5 - Offset X
+                map(Type.FLOAT);    // 6 - Offset Y
+                map(Type.FLOAT);    // 7 - Offset Z
+                map(Type.FLOAT);    // 8 - Particle Data
+                map(Type.INT);      // 9 - Particle Count
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        ParticleMapping.ParticleData old = ParticleMapping.getMapping(wrapper.get(Type.INT, 0));
+                        wrapper.set(Type.INT, 0, old.getHistoryId());
+
+                        int[] data = old.rewriteData(protocol, wrapper);
+                        if (data != null) {
+                            if (old.getHandler().isBlockHandler() && data[0] == 0) {
+                                // Cancel air block particles
+                                wrapper.cancel();
+                                return;
+                            }
+
+                            for (int i : data) {
+                                wrapper.write(Type.VAR_INT, i);
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.PLAYER_INFO, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper packetWrapper) throws Exception {
+                        TabCompleteStorage storage = packetWrapper.user().get(TabCompleteStorage.class);
+                        int action = packetWrapper.passthrough(Type.VAR_INT);
+                        int nPlayers = packetWrapper.passthrough(Type.VAR_INT);
+                        for (int i = 0; i < nPlayers; i++) {
+                            UUID uuid = packetWrapper.passthrough(Type.UUID);
+                            if (action == 0) { // Add
+                                String name = packetWrapper.passthrough(Type.STRING);
+                                storage.usernames.put(uuid, name);
+                                int nProperties = packetWrapper.passthrough(Type.VAR_INT);
+                                for (int j = 0; j < nProperties; j++) {
+                                    packetWrapper.passthrough(Type.STRING);
+                                    packetWrapper.passthrough(Type.STRING);
+                                    if (packetWrapper.passthrough(Type.BOOLEAN)) {
+                                        packetWrapper.passthrough(Type.STRING);
+                                    }
+                                }
+                                packetWrapper.passthrough(Type.VAR_INT);
+                                packetWrapper.passthrough(Type.VAR_INT);
+                                if (packetWrapper.passthrough(Type.BOOLEAN)) {
+                                    packetWrapper.passthrough(Type.COMPONENT);
+                                }
+                            } else if (action == 1) { // Update Game Mode
+                                packetWrapper.passthrough(Type.VAR_INT);
+                            } else if (action == 2) { // Update Ping
+                                packetWrapper.passthrough(Type.VAR_INT);
+                            } else if (action == 3) { // Update Display Name
+                                if (packetWrapper.passthrough(Type.BOOLEAN)) {
+                                    packetWrapper.passthrough(Type.COMPONENT);
+                                }
+                            } else if (action == 4) { // Remove Player
+                                storage.usernames.remove(uuid);
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SCOREBOARD_OBJECTIVE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                map(Type.BYTE);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        byte mode = wrapper.get(Type.BYTE, 0);
+                        if (mode == 0 || mode == 2) {
+                            String value = wrapper.read(Type.COMPONENT).toString();
+                            value = ChatRewriter.jsonTextToLegacy(value);
+                            if (value.length() > 32) {
+                                value = value.substring(0, 32);
+                            }
+
+                            wrapper.write(Type.STRING, value);
+                            int type = wrapper.read(Type.VAR_INT);
+                            wrapper.write(Type.STRING, type == 1 ? "hearts" : "integer");
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.TEAMS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                map(Type.BYTE);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        byte action = wrapper.get(Type.BYTE, 0);
+                        if (action == 0 || action == 2) {
+                            String displayName = wrapper.read(Type.STRING);
+                            displayName = ChatRewriter.jsonTextToLegacy(displayName);
+                            displayName = ChatUtil.removeUnusedColor(displayName, 'f');
+                            if (displayName.length() > 32) {
+                                displayName = displayName.substring(0, 32);
+                            }
+                            wrapper.write(Type.STRING, displayName);
+
+                            byte flags = wrapper.read(Type.BYTE);
+                            String nameTagVisibility = wrapper.read(Type.STRING);
+                            String collisionRule = wrapper.read(Type.STRING);
+
+                            int colour = wrapper.read(Type.VAR_INT);
+                            if (colour == 21) {
+                                colour = -1;
+                            }
+
+                            JsonElement prefixComponent = wrapper.read(Type.COMPONENT);
+                            JsonElement suffixComponent = wrapper.read(Type.COMPONENT);
+
+                            String prefix = prefixComponent == null || prefixComponent.isJsonNull() ? "" : ChatRewriter.jsonTextToLegacy(prefixComponent.toString());
+                            if (ViaBackwards.getConfig().addTeamColorTo1_13Prefix()) {
+                                prefix += "§" + (colour > -1 && colour <= 15 ? Integer.toHexString(colour) : "r");
+                            }
+
+                            prefix = ChatUtil.removeUnusedColor(prefix, 'f', true);
+                            if (prefix.length() > 16) prefix = prefix.substring(0, 16);
+                            if (prefix.endsWith("§")) prefix = prefix.substring(0, prefix.length() - 1);
+
+                            String suffix = suffixComponent == null || suffixComponent.isJsonNull() ? "" : ChatRewriter.jsonTextToLegacy(suffixComponent.toString());
+                            suffix = ChatUtil.removeUnusedColor(suffix, '\0'); // Don't remove white coloring
+                            if (suffix.length() > 16) suffix = suffix.substring(0, 16);
+                            if (suffix.endsWith("§")) suffix = suffix.substring(0, suffix.length() - 1);
+
+                            wrapper.write(Type.STRING, prefix);
+                            wrapper.write(Type.STRING, suffix);
+
+                            wrapper.write(Type.BYTE, flags);
+                            wrapper.write(Type.STRING, nameTagVisibility);
+                            wrapper.write(Type.STRING, collisionRule);
+
+                            wrapper.write(Type.BYTE, (byte) colour);
+                        }
+
+                        if (action == 0 || action == 3 || action == 4) {
+                            wrapper.passthrough(Type.STRING_ARRAY); //Entities
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.TAB_COMPLETE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        TabCompleteStorage storage = wrapper.user().get(TabCompleteStorage.class);
+                        if (storage.lastRequest == null) {
+                            wrapper.cancel();
+                            return;
+                        }
+                        if (storage.lastId != wrapper.read(Type.VAR_INT)) wrapper.cancel();
+                        int start = wrapper.read(Type.VAR_INT);
+                        int length = wrapper.read(Type.VAR_INT);
+
+                        int lastRequestPartIndex = storage.lastRequest.lastIndexOf(' ') + 1;
+                        if (lastRequestPartIndex != start) wrapper.cancel(); // Client only replaces after space
+
+                        if (length != storage.lastRequest.length() - lastRequestPartIndex) {
+                            wrapper.cancel(); // We can't set the length in previous versions
+                        }
+
+                        int count = wrapper.passthrough(Type.VAR_INT);
+                        for (int i = 0; i < count; i++) {
+                            String match = wrapper.read(Type.STRING);
+                            wrapper.write(Type.STRING, (start == 0 && !storage.lastAssumeCommand ? "/" : "") + match);
+                            // Ignore tooltip
+                            if (wrapper.read(Type.BOOLEAN)) {
+                                wrapper.read(Type.STRING);
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_12_1.TAB_COMPLETE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    TabCompleteStorage storage = wrapper.user().get(TabCompleteStorage.class);
+                    int id = ThreadLocalRandom.current().nextInt();
+                    wrapper.write(Type.VAR_INT, id);
+
+                    String command = wrapper.read(Type.STRING);
+                    boolean assumeCommand = wrapper.read(Type.BOOLEAN);
+                    wrapper.read(Type.OPTIONAL_POSITION);
+
+                    if (!assumeCommand) {
+                        if (command.startsWith("/")) {
+                            command = command.substring(1);
+                        } else {
+                            wrapper.cancel();
+                            PacketWrapper response = wrapper.create(0xE);
+                            List<String> usernames = new ArrayList<>();
+                            for (String value : storage.usernames.values()) {
+                                if (value.toLowerCase().startsWith(command.substring(command.lastIndexOf(' ') + 1).toLowerCase())) {
+                                    usernames.add(value);
+                                }
+                            }
+                            response.write(Type.VAR_INT, usernames.size());
+                            for (String value : usernames) {
+                                response.write(Type.STRING, value);
+                            }
+                            response.send(protocol.getClass());
+                        }
+                    }
+
+                    wrapper.write(Type.STRING, command);
+                    storage.lastId = id;
+                    storage.lastAssumeCommand = assumeCommand;
+                    storage.lastRequest = command;
+                });
+            }
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_12_1.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    String channel = wrapper.read(Type.STRING);
+                    switch (channel) {
+                        case "MC|BSign":
+                        case "MC|BEdit":
+                            wrapper.setId(0x0B);
+                            Item book = wrapper.read(Type.ITEM);
+                            wrapper.write(Type.FLAT_ITEM, getProtocol().getBlockItemPackets().handleItemToServer(book));
+                            boolean signing = channel.equals("MC|BSign");
+                            wrapper.write(Type.BOOLEAN, signing);
+                            break;
+                        case "MC|ItemName":
+                            wrapper.setId(0x1C);
+                            break;
+                        case "MC|AdvCmd":
+                            byte type = wrapper.read(Type.BYTE);
+                            if (type == 0) {
+                                //Information from https://wiki.vg/index.php?title=Plugin_channels&oldid=14089
+                                //The Notchain client only uses this for command block minecarts and uses MC|AutoCmd for blocks, but the Notchian server still accepts it for either.
+                                //Maybe older versions used this and we need to implement this? The issues is that we would have to save the command block types
+                                wrapper.setId(0x22);
+                                wrapper.cancel();
+                                ViaBackwards.getPlatform().getLogger().warning("Client send MC|AdvCmd custom payload to update command block, weird!");
+                            } else if (type == 1) {
+                                wrapper.setId(0x23);
+                                wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Entity Id
+                                wrapper.passthrough(Type.STRING); //Command
+                                wrapper.passthrough(Type.BOOLEAN); //Track Output
+
+                            } else {
+                                wrapper.cancel();
+                            }
+                            break;
+                        case "MC|AutoCmd": {
+                            wrapper.setId(0x22);
+
+                            int x = wrapper.read(Type.INT);
+                            int y = wrapper.read(Type.INT);
+                            int z = wrapper.read(Type.INT);
+
+                            wrapper.write(Type.POSITION, new Position(x, (short) y, z));
+
+                            wrapper.passthrough(Type.STRING);  //Command
+
+
+                            byte flags = 0;
+                            if (wrapper.read(Type.BOOLEAN)) flags |= 0x01; //Track Output
+
+                            String mode = wrapper.read(Type.STRING);
+
+                            int modeId = mode.equals("SEQUENCE") ? 0 : mode.equals("AUTO") ? 1 : 2;
+                            wrapper.write(Type.VAR_INT, modeId);
+
+                            if (wrapper.read(Type.BOOLEAN)) flags |= 0x02; //Is conditional
+                            if (wrapper.read(Type.BOOLEAN)) flags |= 0x04; //Automatic
+
+                            wrapper.write(Type.BYTE, flags);
+                            break;
+                        }
+                        case "MC|Struct": {
+                            wrapper.setId(0x25);
+                            int x = wrapper.read(Type.INT);
+                            int y = wrapper.read(Type.INT);
+                            int z = wrapper.read(Type.INT);
+                            wrapper.write(Type.POSITION, new Position(x, (short) y, z));
+                            wrapper.write(Type.VAR_INT, wrapper.read(Type.BYTE) - 1);
+                            String mode = wrapper.read(Type.STRING);
+                            int modeId = mode.equals("SAVE") ? 0 : mode.equals("LOAD") ? 1 : mode.equals("CORNER") ? 2 : 3;
+                            wrapper.write(Type.VAR_INT, modeId);
+                            wrapper.passthrough(Type.STRING); //Name
+
+                            wrapper.write(Type.BYTE, wrapper.read(Type.INT).byteValue()); //Offset X
+
+                            wrapper.write(Type.BYTE, wrapper.read(Type.INT).byteValue()); //Offset Y
+
+                            wrapper.write(Type.BYTE, wrapper.read(Type.INT).byteValue()); //Offset Z
+
+                            wrapper.write(Type.BYTE, wrapper.read(Type.INT).byteValue()); //Size X
+
+                            wrapper.write(Type.BYTE, wrapper.read(Type.INT).byteValue()); //Size Y
+
+                            wrapper.write(Type.BYTE, wrapper.read(Type.INT).byteValue()); //Size Z
+
+                            String mirror = wrapper.read(Type.STRING);
+                            int mirrorId = mode.equals("NONE") ? 0 : mode.equals("LEFT_RIGHT") ? 1 : 2;
+                            String rotation = wrapper.read(Type.STRING);
+                            int rotationId = mode.equals("NONE") ? 0 : mode.equals("CLOCKWISE_90") ? 1 : mode.equals("CLOCKWISE_180") ? 2 : 3;
+                            wrapper.passthrough(Type.STRING); //Metadata
+
+                            byte flags = 0;
+                            if (wrapper.read(Type.BOOLEAN)) flags |= 0x01; //Ignore entities
+                            if (wrapper.read(Type.BOOLEAN)) flags |= 0x02; //Show air
+                            if (wrapper.read(Type.BOOLEAN)) flags |= 0x04; //Show bounding box
+                            wrapper.passthrough(Type.FLOAT); //Integrity
+
+                            wrapper.passthrough(Type.VAR_LONG); //Seed
+
+                            wrapper.write(Type.BYTE, flags);
+                            break;
+                        }
+                        case "MC|Beacon":
+                            wrapper.setId(0x20);
+                            wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Primary Effect
+
+                            wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Secondary Effect
+
+                            break;
+                        case "MC|TrSel":
+                            wrapper.setId(0x1F);
+                            wrapper.write(Type.VAR_INT, wrapper.read(Type.INT)); //Slot
+
+                            break;
+                        case "MC|PickItem":
+                            wrapper.setId(0x15);
+                            break;
+                        default:
+                            String newChannel = InventoryPackets.getNewPluginChannelId(channel);
+                            if (newChannel == null) {
+                                if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                                    ViaBackwards.getPlatform().getLogger().warning("Ignoring incoming plugin message with channel: " + channel);
+                                }
+                                wrapper.cancel();
+                                return;
+                            }
+                            wrapper.write(Type.STRING, newChannel);
+
+                            if (newChannel.equals("minecraft:register") || newChannel.equals("minecraft:unregister")) {
+                                String[] channels = new String(wrapper.read(Type.REMAINING_BYTES), StandardCharsets.UTF_8).split("\0");
+                                List<String> rewrittenChannels = new ArrayList<>();
+                                for (String s : channels) {
+                                    String rewritten = InventoryPackets.getNewPluginChannelId(s);
+                                    if (rewritten != null) {
+                                        rewrittenChannels.add(rewritten);
+                                    } else if (!Via.getConfig().isSuppressConversionWarnings() || Via.getManager().isDebug()) {
+                                        ViaBackwards.getPlatform().getLogger().warning("Ignoring plugin channel in incoming REGISTER: " + s);
+                                    }
+                                }
+                                if (!rewrittenChannels.isEmpty()) {
+                                    wrapper.write(Type.REMAINING_BYTES, Joiner.on('\0').join(rewrittenChannels).getBytes(StandardCharsets.UTF_8));
+                                } else {
+                                    wrapper.cancel();
+                                    return;
+                                }
+                            }
+                            break;
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.STATISTICS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int size = wrapper.get(Type.VAR_INT, 0);
+                        int newSize = size;
+                        for (int i = 0; i < size; i++) {
+                            int categoryId = wrapper.read(Type.VAR_INT);
+                            int statisticId = wrapper.read(Type.VAR_INT);
+
+                            String name = "";
+                            // categories 0-7 (items, blocks, entities) - probably not feasible
+                            switch (categoryId) {
+                                case 0:
+                                case 1:
+                                case 2:
+                                case 3:
+                                case 4:
+                                case 5:
+                                case 6:
+                                case 7:
+                                    wrapper.read(Type.VAR_INT); // remove value
+                                    newSize--;
+                                    continue;
+                                case 8:
+                                    name = protocol.getMappingData().getStatisticMappings().get(statisticId);
+                                    if (name == null) {
+                                        wrapper.read(Type.VAR_INT);
+                                        newSize--;
+                                        continue;
+                                    }
+                                    break;
+                            }
+
+                            wrapper.write(Type.STRING, name); // string id
+                            wrapper.passthrough(Type.VAR_INT); // value
+                        }
+
+                        if (newSize != size) {
+                            wrapper.set(Type.VAR_INT, 0, newSize);
+                        }
+                    }
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/packets/SoundPackets1_13.java

@@ -0,0 +1,84 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.packets;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.api.rewriters.Rewriter;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.Protocol1_12_2To1_13;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.data.NamedSoundMapping;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ClientboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+
+public class SoundPackets1_13 extends Rewriter<Protocol1_12_2To1_13> {
+    private static final String[] SOUND_SOURCES = {"master", "music", "record", "weather", "block", "hostile", "neutral", "player", "ambient", "voice"};
+
+    public SoundPackets1_13(Protocol1_12_2To1_13 protocol) {
+        super(protocol);
+    }
+
+    @Override
+    protected void registerPackets() {
+        protocol.registerOutgoing(ClientboundPackets1_13.NAMED_SOUND, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING);
+                handler(wrapper -> {
+                    String newSound = wrapper.get(Type.STRING, 0);
+                    String oldSound = NamedSoundMapping.getOldId(newSound);
+                    if (oldSound != null || (oldSound = protocol.getMappingData().getMappedNamedSound(newSound)) != null) {
+                        wrapper.set(Type.STRING, 0, oldSound);
+                    } else if (!Via.getConfig().isSuppressConversionWarnings()) {
+                        ViaBackwards.getPlatform().getLogger().warning("Unknown named sound in 1.13->1.12 protocol: " + newSound);
+                    }
+                });
+            }
+        });
+
+        // Stop Sound -> Plugin Message
+        protocol.registerOutgoing(ClientboundPackets1_13.STOP_SOUND, ClientboundPackets1_12_1.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(wrapper -> {
+                    wrapper.write(Type.STRING, "MC|StopSound");
+                    byte flags = wrapper.read(Type.BYTE);
+                    String source;
+                    if ((flags & 0x01) != 0) {
+                        source = SOUND_SOURCES[wrapper.read(Type.VAR_INT)];
+                    } else {
+                        source = "";
+                    }
+
+                    String sound;
+                    if ((flags & 0x02) != 0) {
+                        sound = protocol.getMappingData().getMappedNamedSound(wrapper.read(Type.STRING));
+                        if (sound == null) {
+                            sound = "";
+                        }
+                    } else {
+                        sound = "";
+                    }
+
+                    wrapper.write(Type.STRING, source);
+                    wrapper.write(Type.STRING, sound);
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SOUND, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT);
+                handler(wrapper -> {
+                    int newSound = wrapper.get(Type.VAR_INT, 0);
+                    int oldSound = protocol.getMappingData().getSoundMappings().getNewId(newSound);
+                    if (oldSound == -1) {
+                        wrapper.cancel();
+                    } else {
+                        wrapper.set(Type.VAR_INT, 0, oldSound);
+                    }
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/providers/BackwardsBlockEntityProvider.java

@@ -0,0 +1,98 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.providers;
+
+import nl.matsv.viabackwards.ViaBackwards;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.block_entity_handlers.*;
+import nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage.BackwardsBlockStorage;
+import us.myles.ViaVersion.api.Via;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.minecraft.Position;
+import us.myles.ViaVersion.api.platform.providers.Provider;
+import us.myles.viaversion.libs.opennbt.tag.builtin.CompoundTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.IntTag;
+import us.myles.viaversion.libs.opennbt.tag.builtin.StringTag;
+
+import java.util.HashMap;
+import java.util.Map;
+
+public class BackwardsBlockEntityProvider implements Provider {
+    private final Map<String, BackwardsBlockEntityProvider.BackwardsBlockEntityHandler> handlers = new HashMap<>();
+
+    public BackwardsBlockEntityProvider() {
+        handlers.put("minecraft:flower_pot", new FlowerPotHandler()); // TODO requires special treatment, manually send
+        handlers.put("minecraft:bed", new BedHandler());
+        handlers.put("minecraft:banner", new BannerHandler());
+        handlers.put("minecraft:skull", new SkullHandler());
+        handlers.put("minecraft:mob_spawner", new SpawnerHandler());
+        handlers.put("minecraft:piston", new PistonHandler());
+    }
+
+    /**
+     * Check if a block entity handler is present
+     *
+     * @param key Id of the NBT data ex: minecraft:bed
+     * @return true if present
+     */
+    public boolean isHandled(String key) {
+        return handlers.containsKey(key);
+    }
+
+    /**
+     * Transform blocks to block entities!
+     *
+     * @param user     The user
+     * @param position The position of the block entity
+     * @param tag      The block entity tag
+     */
+    public CompoundTag transform(UserConnection user, Position position, CompoundTag tag) throws Exception {
+        String id = (String) tag.get("id").getValue();
+        BackwardsBlockEntityHandler handler = handlers.get(id);
+        if (handler == null) {
+            if (Via.getManager().isDebug()) {
+                ViaBackwards.getPlatform().getLogger().warning("Unhandled BlockEntity " + id + " full tag: " + tag);
+            }
+            return tag;
+        }
+
+        BackwardsBlockStorage storage = user.get(BackwardsBlockStorage.class);
+        Integer blockId = storage.get(position);
+        if (blockId == null) {
+            if (Via.getManager().isDebug()) {
+                ViaBackwards.getPlatform().getLogger().warning("Handled BlockEntity does not have a stored block :( " + id + " full tag: " + tag);
+            }
+            return tag;
+        }
+
+        return handler.transform(user, blockId, tag);
+    }
+
+    /**
+     * Transform blocks to block entities!
+     *
+     * @param user     The user
+     * @param position The position of the block entity
+     * @param id       The block entity id
+     */
+    public CompoundTag transform(UserConnection user, Position position, String id) throws Exception {
+        CompoundTag tag = new CompoundTag("");
+        tag.put(new StringTag("id", id));
+        tag.put(new IntTag("x", Math.toIntExact(position.getX())));
+        tag.put(new IntTag("y", Math.toIntExact(position.getY())));
+        tag.put(new IntTag("z", Math.toIntExact(position.getZ())));
+
+        return this.transform(user, position, tag);
+    }
+
+    public interface BackwardsBlockEntityHandler {
+        CompoundTag transform(UserConnection user, int blockId, CompoundTag tag);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/storage/BackwardsBlockStorage.java

@@ -0,0 +1,97 @@
+/*
+ * Copyright (c) 2016 Matsv
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage;
+
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.minecraft.Position;
+import us.myles.viaversion.libs.fastutil.ints.IntOpenHashSet;
+import us.myles.viaversion.libs.fastutil.ints.IntSet;
+
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+
+public class BackwardsBlockStorage extends StoredObject {
+    // This BlockStorage is very exclusive (;
+    private static final IntSet WHITELIST = new IntOpenHashSet(779);
+
+    static {
+        // Flower pots
+        for (int i = 5265; i <= 5286; i++) {
+            WHITELIST.add(i);
+        }
+
+        // Add those beds
+        for (int i = 0; i < (16 * 16); i++) {
+            WHITELIST.add(748 + i);
+        }
+
+        // Add the banners
+        for (int i = 6854; i <= 7173; i++) {
+            WHITELIST.add(i);
+        }
+
+        // Spawner
+        WHITELIST.add(1647);
+
+        // Skulls
+        for (int i = 5447; i <= 5566; i++) {
+            WHITELIST.add(i);
+        }
+
+        // pistons
+        for (int i = 1028; i <= 1039; i++) {
+            WHITELIST.add(i);
+        }
+        for (int i = 1047; i <= 1082; i++) {
+            WHITELIST.add(i);
+        }
+        for (int i = 1099; i <= 1110; i++) {
+            WHITELIST.add(i);
+        }
+    }
+
+    private final Map<Position, Integer> blocks = new ConcurrentHashMap<>();
+
+    public BackwardsBlockStorage(UserConnection user) {
+        super(user);
+    }
+
+    public void checkAndStore(Position position, int block) {
+        if (!WHITELIST.contains(block)) {
+            // Remove if not whitelisted
+            blocks.remove(position);
+            return;
+        }
+
+        blocks.put(position, block);
+    }
+
+    public boolean isWelcome(int block) {
+        return WHITELIST.contains(block);
+    }
+
+    public Integer get(Position position) {
+        return blocks.get(position);
+    }
+
+    public int remove(Position position) {
+        return blocks.remove(position);
+    }
+
+    public void clear() {
+        blocks.clear();
+    }
+
+    public Map<Position, Integer> getBlocks() {
+        return blocks;
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/storage/PlayerPositionStorage1_13.java

@@ -0,0 +1,11 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage;
+
+import nl.matsv.viabackwards.api.entities.storage.PlayerPositionStorage;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+public class PlayerPositionStorage1_13 extends PlayerPositionStorage {
+
+    public PlayerPositionStorage1_13(UserConnection user) {
+        super(user);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12_2to1_13/storage/TabCompleteStorage.java

@@ -0,0 +1,19 @@
+package nl.matsv.viabackwards.protocol.protocol1_12_2to1_13.storage;
+
+import us.myles.ViaVersion.api.data.StoredObject;
+import us.myles.ViaVersion.api.data.UserConnection;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+public class TabCompleteStorage extends StoredObject {
+    public int lastId;
+    public String lastRequest;
+    public boolean lastAssumeCommand;
+    public Map<UUID, String> usernames = new HashMap<>();
+
+    public TabCompleteStorage(UserConnection user) {
+        super(user);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_12to1_12_1/Protocol1_12To1_12_1.java

@@ -0,0 +1,20 @@
+package nl.matsv.viabackwards.protocol.protocol1_12to1_12_1;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ClientboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_12_1to1_12.ServerboundPackets1_12_1;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ClientboundPackets1_12;
+import us.myles.ViaVersion.protocols.protocol1_12to1_11_1.ServerboundPackets1_12;
+
+public class Protocol1_12To1_12_1 extends BackwardsProtocol<ClientboundPackets1_12_1, ClientboundPackets1_12, ServerboundPackets1_12_1, ServerboundPackets1_12> {
+
+    public Protocol1_12To1_12_1() {
+        super(ClientboundPackets1_12_1.class, ClientboundPackets1_12.class, ServerboundPackets1_12_1.class, ServerboundPackets1_12.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        cancelOutgoing(ClientboundPackets1_12_1.CRAFT_RECIPE_RESPONSE);
+        cancelIncoming(ServerboundPackets1_12.PREPARE_CRAFTING_GRID);
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13_1to1_13_2/Protocol1_13_1To1_13_2.java

@@ -0,0 +1,76 @@
+package nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.packets.EntityPackets1_13_2;
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.packets.InventoryPackets1_13_2;
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.packets.WorldPackets1_13_2;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.minecraft.item.Item;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
+
+public class Protocol1_13_1To1_13_2 extends BackwardsProtocol<ClientboundPackets1_13, ClientboundPackets1_13, ServerboundPackets1_13, ServerboundPackets1_13> {
+
+    public Protocol1_13_1To1_13_2() {
+        super(ClientboundPackets1_13.class, ClientboundPackets1_13.class, ServerboundPackets1_13.class, ServerboundPackets1_13.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        InventoryPackets1_13_2.register(this);
+        WorldPackets1_13_2.register(this);
+        EntityPackets1_13_2.register(this);
+
+        registerIncoming(ServerboundPackets1_13.EDIT_BOOK, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.FLAT_ITEM, Type.FLAT_VAR_INT_ITEM);
+            }
+        });
+
+        registerOutgoing(ClientboundPackets1_13.ADVANCEMENTS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        wrapper.passthrough(Type.BOOLEAN); // Reset/clear
+                        int size = wrapper.passthrough(Type.VAR_INT); // Mapping size
+
+                        for (int i = 0; i < size; i++) {
+                            wrapper.passthrough(Type.STRING); // Identifier
+
+                            // Parent
+                            if (wrapper.passthrough(Type.BOOLEAN))
+                                wrapper.passthrough(Type.STRING);
+
+                            // Display data
+                            if (wrapper.passthrough(Type.BOOLEAN)) {
+                                wrapper.passthrough(Type.COMPONENT); // Title
+                                wrapper.passthrough(Type.COMPONENT); // Description
+                                Item icon = wrapper.read(Type.FLAT_VAR_INT_ITEM);
+                                wrapper.write(Type.FLAT_ITEM, icon);
+                                wrapper.passthrough(Type.VAR_INT); // Frame type
+                                int flags = wrapper.passthrough(Type.INT); // Flags
+                                if ((flags & 1) != 0)
+                                    wrapper.passthrough(Type.STRING); // Background texture
+                                wrapper.passthrough(Type.FLOAT); // X
+                                wrapper.passthrough(Type.FLOAT); // Y
+                            }
+
+                            wrapper.passthrough(Type.STRING_ARRAY); // Criteria
+
+                            int arrayLength = wrapper.passthrough(Type.VAR_INT);
+                            for (int array = 0; array < arrayLength; array++) {
+                                wrapper.passthrough(Type.STRING_ARRAY); // String array
+                            }
+                        }
+                    }
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13_1to1_13_2/packets/EntityPackets1_13_2.java

@@ -0,0 +1,94 @@
+package nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.packets;
+
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.Protocol1_13_1To1_13_2;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.minecraft.metadata.Metadata;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_13;
+import us.myles.ViaVersion.api.minecraft.metadata.types.MetaType1_13_2;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.api.type.types.version.Types1_13;
+import us.myles.ViaVersion.api.type.types.version.Types1_13_2;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+
+public class EntityPackets1_13_2 {
+
+
+    public static void register(Protocol1_13_1To1_13_2 protocol) {
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_MOB, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.UUID); // 1 - Entity UUID
+                map(Type.VAR_INT); // 2 - Entity Type
+                map(Type.DOUBLE); // 3 - X
+                map(Type.DOUBLE); // 4 - Y
+                map(Type.DOUBLE); // 5 - Z
+                map(Type.BYTE); // 6 - Yaw
+                map(Type.BYTE); // 7 - Pitch
+                map(Type.BYTE); // 8 - Head Pitch
+                map(Type.SHORT); // 9 - Velocity X
+                map(Type.SHORT); // 10 - Velocity Y
+                map(Type.SHORT); // 11 - Velocity Z
+                map(Types1_13_2.METADATA_LIST, Types1_13.METADATA_LIST); // 12 - Metadata
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        for (Metadata metadata : wrapper.get(Types1_13.METADATA_LIST, 0)) {
+                            if (metadata.getMetaType() == MetaType1_13_2.Slot) {
+                                metadata.setMetaType(MetaType1_13.Slot);
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PLAYER, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.UUID); // 1 - Player UUID
+                map(Type.DOUBLE); // 2 - X
+                map(Type.DOUBLE); // 3 - Y
+                map(Type.DOUBLE); // 4 - Z
+                map(Type.BYTE); // 5 - Yaw
+                map(Type.BYTE); // 6 - Pitch
+                map(Types1_13_2.METADATA_LIST, Types1_13.METADATA_LIST); // 7 - Metadata
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        for (Metadata metadata : wrapper.get(Types1_13.METADATA_LIST, 0)) {
+                            if (metadata.getMetaType() == MetaType1_13_2.Slot) {
+                                metadata.setMetaType(MetaType1_13.Slot);
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.ENTITY_METADATA, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Types1_13_2.METADATA_LIST, Types1_13.METADATA_LIST); // 1 - Metadata list
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        for (Metadata metadata : wrapper.get(Types1_13.METADATA_LIST, 0)) {
+                            if (metadata.getMetaType() == MetaType1_13_2.Slot) {
+                                metadata.setMetaType(MetaType1_13.Slot);
+                            }
+                        }
+                    }
+                });
+            }
+        });
+    }
+
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13_1to1_13_2/packets/InventoryPackets1_13_2.java

@@ -0,0 +1,132 @@
+package nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.packets;
+
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.Protocol1_13_1To1_13_2;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
+
+public class InventoryPackets1_13_2 {
+
+    public static void register(Protocol1_13_1To1_13_2 protocol) {
+        protocol.registerOutgoing(ClientboundPackets1_13.SET_SLOT, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot ID
+                map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM); // 2 - Slot Value
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.WINDOW_ITEMS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.FLAT_VAR_INT_ITEM_ARRAY, Type.FLAT_ITEM_ARRAY); // 1 - Window Values
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.PLUGIN_MESSAGE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.STRING); // Channel
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        String channel = wrapper.get(Type.STRING, 0);
+                        if (channel.equals("minecraft:trader_list") || channel.equals("trader_list")) {
+                            wrapper.passthrough(Type.INT); // Passthrough Window ID
+
+                            int size = wrapper.passthrough(Type.UNSIGNED_BYTE);
+                            for (int i = 0; i < size; i++) {
+                                // Input Item
+                                wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+                                // Output Item
+                                wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+
+                                boolean secondItem = wrapper.passthrough(Type.BOOLEAN); // Has second item
+                                if (secondItem) {
+                                    wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+                                }
+
+                                wrapper.passthrough(Type.BOOLEAN); // Trade disabled
+                                wrapper.passthrough(Type.INT); // Number of tools uses
+                                wrapper.passthrough(Type.INT); // Maximum number of trade uses
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.ENTITY_EQUIPMENT, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.VAR_INT); // 0 - Entity ID
+                map(Type.VAR_INT); // 1 - Slot ID
+                map(Type.FLAT_VAR_INT_ITEM, Type.FLAT_ITEM); // 2 - Item
+            }
+        });
+
+        protocol.registerOutgoing(ClientboundPackets1_13.DECLARE_RECIPES, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int recipesNo = wrapper.passthrough(Type.VAR_INT);
+                        for (int i = 0; i < recipesNo; i++) {
+                            wrapper.passthrough(Type.STRING); // Id
+                            String type = wrapper.passthrough(Type.STRING);
+                            if (type.equals("crafting_shapeless")) {
+                                wrapper.passthrough(Type.STRING); // Group
+                                int ingredientsNo = wrapper.passthrough(Type.VAR_INT);
+                                for (int i1 = 0; i1 < ingredientsNo; i1++) {
+                                    wrapper.write(Type.FLAT_ITEM_ARRAY_VAR_INT, wrapper.read(Type.FLAT_VAR_INT_ITEM_ARRAY_VAR_INT));
+                                }
+                                wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+                            } else if (type.equals("crafting_shaped")) {
+                                int ingredientsNo = wrapper.passthrough(Type.VAR_INT) * wrapper.passthrough(Type.VAR_INT);
+                                wrapper.passthrough(Type.STRING); // Group
+                                for (int i1 = 0; i1 < ingredientsNo; i1++) {
+                                    wrapper.write(Type.FLAT_ITEM_ARRAY_VAR_INT, wrapper.read(Type.FLAT_VAR_INT_ITEM_ARRAY_VAR_INT));
+                                }
+                                wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+                            } else if (type.equals("smelting")) {
+                                wrapper.passthrough(Type.STRING); // Group
+                                // Ingredient start
+                                wrapper.write(Type.FLAT_ITEM_ARRAY_VAR_INT, wrapper.read(Type.FLAT_VAR_INT_ITEM_ARRAY_VAR_INT));
+                                // Ingredient end
+                                wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+                                wrapper.passthrough(Type.FLOAT); // EXP
+                                wrapper.passthrough(Type.VAR_INT); // Cooking time
+                            }
+                        }
+                    }
+                });
+            }
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_13.CLICK_WINDOW, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.UNSIGNED_BYTE); // 0 - Window ID
+                map(Type.SHORT); // 1 - Slot
+                map(Type.BYTE); // 2 - Button
+                map(Type.SHORT); // 3 - Action number
+                map(Type.VAR_INT); // 4 - Mode
+                map(Type.FLAT_ITEM, Type.FLAT_VAR_INT_ITEM); // 5 - Clicked Item
+            }
+        });
+
+        protocol.registerIncoming(ServerboundPackets1_13.CREATIVE_INVENTORY_ACTION, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.SHORT); // 0 - Slot
+                map(Type.FLAT_ITEM, Type.FLAT_VAR_INT_ITEM); // 1 - Clicked Item
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13_1to1_13_2/packets/WorldPackets1_13_2.java

@@ -0,0 +1,39 @@
+package nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.packets;
+
+import nl.matsv.viabackwards.protocol.protocol1_13_1to1_13_2.Protocol1_13_1To1_13_2;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+
+public class WorldPackets1_13_2 {
+
+    public static void register(Protocol1_13_1To1_13_2 protocol) {
+        protocol.registerOutgoing(ClientboundPackets1_13.SPAWN_PARTICLE, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                map(Type.INT); // 0 - Particle ID
+                map(Type.BOOLEAN); // 1 - Long Distance
+                map(Type.FLOAT); // 2 - X
+                map(Type.FLOAT); // 3 - Y
+                map(Type.FLOAT); // 4 - Z
+                map(Type.FLOAT); // 5 - Offset X
+                map(Type.FLOAT); // 6 - Offset Y
+                map(Type.FLOAT); // 7 - Offset Z
+                map(Type.FLOAT); // 8 - Particle Data
+                map(Type.INT); // 9 - Particle Count
+
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int id = wrapper.get(Type.INT, 0);
+                        if (id == 27) {
+                            wrapper.write(Type.FLAT_ITEM, wrapper.read(Type.FLAT_VAR_INT_ITEM));
+                        }
+                    }
+                });
+            }
+        });
+    }
+}

core/src/main/java/nl/matsv/viabackwards/protocol/protocol1_13_2to1_14/Protocol1_13_2To1_14.java

@@ -0,0 +1,196 @@
+package nl.matsv.viabackwards.protocol.protocol1_13_2to1_14;
+
+import nl.matsv.viabackwards.api.BackwardsProtocol;
+import nl.matsv.viabackwards.api.data.BackwardsMappings;
+import nl.matsv.viabackwards.api.entities.storage.EntityTracker;
+import nl.matsv.viabackwards.api.rewriters.TranslatableRewriter;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.packets.BlockItemPackets1_14;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.packets.EntityPackets1_14;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.packets.PlayerPackets1_14;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.packets.SoundPackets1_14;
+import nl.matsv.viabackwards.protocol.protocol1_13_2to1_14.storage.ChunkLightStorage;
+import us.myles.ViaVersion.api.PacketWrapper;
+import us.myles.ViaVersion.api.data.UserConnection;
+import us.myles.ViaVersion.api.remapper.PacketHandler;
+import us.myles.ViaVersion.api.remapper.PacketRemapper;
+import us.myles.ViaVersion.api.rewriters.StatisticsRewriter;
+import us.myles.ViaVersion.api.type.Type;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ClientboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_13to1_12_2.ServerboundPackets1_13;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ClientboundPackets1_14;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.Protocol1_14To1_13_2;
+import us.myles.ViaVersion.protocols.protocol1_14to1_13_2.ServerboundPackets1_14;
+import us.myles.ViaVersion.protocols.protocol1_9_3to1_9_1_2.storage.ClientWorld;
+
+public class Protocol1_13_2To1_14 extends BackwardsProtocol<ClientboundPackets1_14, ClientboundPackets1_13, ServerboundPackets1_14, ServerboundPackets1_13> {
+
+    public static final BackwardsMappings MAPPINGS = new BackwardsMappings("1.14", "1.13.2", Protocol1_14To1_13_2.class, true);
+    private BlockItemPackets1_14 blockItemPackets;
+    private EntityPackets1_14 entityPackets;
+
+    public Protocol1_13_2To1_14() {
+        super(ClientboundPackets1_14.class, ClientboundPackets1_13.class, ServerboundPackets1_14.class, ServerboundPackets1_13.class);
+    }
+
+    @Override
+    protected void registerPackets() {
+        executeAsyncAfterLoaded(Protocol1_14To1_13_2.class, MAPPINGS::load);
+
+        TranslatableRewriter translatableRewriter = new TranslatableRewriter(this);
+        translatableRewriter.registerBossBar(ClientboundPackets1_14.BOSSBAR);
+        translatableRewriter.registerChatMessage(ClientboundPackets1_14.CHAT_MESSAGE);
+        translatableRewriter.registerCombatEvent(ClientboundPackets1_14.COMBAT_EVENT);
+        translatableRewriter.registerDisconnect(ClientboundPackets1_14.DISCONNECT);
+        translatableRewriter.registerTabList(ClientboundPackets1_14.TAB_LIST);
+        translatableRewriter.registerTitle(ClientboundPackets1_14.TITLE);
+        translatableRewriter.registerPing();
+
+        blockItemPackets = new BlockItemPackets1_14(this, translatableRewriter);
+        blockItemPackets.register();
+        entityPackets = new EntityPackets1_14(this);
+        entityPackets.register();
+        new PlayerPackets1_14(this).register();
+        new SoundPackets1_14(this).register();
+
+        new StatisticsRewriter(this, entityPackets::getOldEntityId).register(ClientboundPackets1_14.STATISTICS);
+
+        cancelOutgoing(ClientboundPackets1_14.UPDATE_VIEW_POSITION);
+        cancelOutgoing(ClientboundPackets1_14.UPDATE_VIEW_DISTANCE);
+        cancelOutgoing(ClientboundPackets1_14.ACKNOWLEDGE_PLAYER_DIGGING);
+
+        registerOutgoing(ClientboundPackets1_14.TAGS, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int blockTagsSize = wrapper.passthrough(Type.VAR_INT);
+                        for (int i = 0; i < blockTagsSize; i++) {
+                            wrapper.passthrough(Type.STRING);
+                            int[] blockIds = wrapper.passthrough(Type.VAR_INT_ARRAY_PRIMITIVE);
+                            for (int j = 0; j < blockIds.length; j++) {
+                                int id = blockIds[j];
+                                // Ignore new blocktags
+                                int blockId = getMappingData().getNewBlockId(id);
+                                blockIds[j] = blockId;
+                            }
+                        }
+
+                        int itemTagsSize = wrapper.passthrough(Type.VAR_INT);
+                        for (int i = 0; i < itemTagsSize; i++) {
+                            wrapper.passthrough(Type.STRING);
+                            int[] itemIds = wrapper.passthrough(Type.VAR_INT_ARRAY_PRIMITIVE);
+                            for (int j = 0; j < itemIds.length; j++) {
+                                int itemId = itemIds[j];
+                                // Ignore new itemtags
+                                int oldId = getMappingData().getItemMappings().get(itemId);
+                                itemIds[j] = oldId;
+                            }
+                        }
+
+                        int fluidTagsSize = wrapper.passthrough(Type.VAR_INT); // fluid tags
+                        for (int i = 0; i < fluidTagsSize; i++) {
+                            wrapper.passthrough(Type.STRING);
+                            wrapper.passthrough(Type.VAR_INT_ARRAY_PRIMITIVE);
+                        }
+
+                        // Eat entity tags
+                        int entityTagsSize = wrapper.read(Type.VAR_INT);
+                        for (int i = 0; i < entityTagsSize; i++) {
+                            wrapper.read(Type.STRING);
+                            wrapper.read(Type.VAR_INT_ARRAY_PRIMITIVE);
+                        }
+                    }
+                });
+            }
+        });
+
+        registerOutgoing(ClientboundPackets1_14.UPDATE_LIGHT, null, new PacketRemapper() {
+            @Override
+            public void registerMap() {
+                handler(new PacketHandler() {
+                    @Override
+                    public void handle(PacketWrapper wrapper) throws Exception {
+                        int x = wrapper.read(Type.VAR_INT);
+                        int z = wrapper.read(Type.VAR_INT);
+                        int skyLightMask = wrapper.read(Type.VAR_INT);
+                        int blockLightMask = wrapper.read(Type.VAR_INT);
+                        int emptySkyLightMask = wrapper.read(Type.VAR_INT);
+                        int emptyBlockLightMask = wrapper.read(Type.VAR_INT);
+
+                        byte[][] skyLight = new byte[16][];
+                        // we don't need void and +256 light
+                        if (isSet(skyLightMask, 0)) {
+                            wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                        }
+                        for (int i = 0; i < 16; i++) {
+                            if (isSet(skyLightMask, i + 1)) {
+                                skyLight[i] = wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                            } else if (isSet(emptySkyLightMask, i + 1)) {
+                                skyLight[i] = ChunkLightStorage.EMPTY_LIGHT;
+                            }
+                        }
+                        if (isSet(skyLightMask, 17)) {
+                            wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                        }
+
+                        byte[][] blockLight = new byte[16][];
+                        if (isSet(blockLightMask, 0)) {
+                            wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                        }
+                        for (int i = 0; i < 16; i++) {
+                            if (isSet(blockLightMask, i + 1)) {
+                                blockLight[i] = wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                            } else if (isSet(emptyBlockLightMask, i + 1)) {
+                                blockLight[i] = ChunkLightStorage.EMPTY_LIGHT;
+                            }
+                        }
+                        if (isSet(blockLightMask, 17)) {
+                            wrapper.read(Type.BYTE_ARRAY_PRIMITIVE);
+                        }
+
+                        wrapper.user().get(ChunkLightStorage.class).setStoredLight(skyLight, blockLight, x, z);
+                        wrapper.cancel();
+                    }
+
+                    private boolean isSet(int mask, int i) {
+                        return (mask & (1 << i)) != 0;
+                    }
+                });
+            }
+        });
+    }
+
+    @Override
+    public void init(UserConnection user) {
+        // Register ClientWorld
+        if (!user.has(ClientWorld.class)) {
+            user.put(new ClientWorld(user));
+        }
+
+        // Register EntityTracker if it doesn't exist yet.
+        if (!user.has(EntityTracker.class)) {
+            user.put(new EntityTracker(user));
+        }
+
+        // Init protocol in EntityTracker
+        user.get(EntityTracker.class).initProtocol(this);
+
+        if (!user.has(ChunkLightStorage.class)) {
+            user.put(new ChunkLightStorage(user));
+        }
+    }
+
+    public BlockItemPackets1_14 getBlockItemPackets() {
+        return blockItemPackets;
+    }
+
+    public EntityPackets1_14 getEntityPackets() {
+        return entityPackets;
+    }
+
+    @Override
+    public BackwardsMappings getMappingData() {
+        return MAPPINGS;
+    }
+}