Official packetevents 1.8-pre-17

ClientVersion#v_1_17_1 created;
ConcurrentModificationException when calling getEntityById method fixed;

.github/FUNDING.yml

@@ -0,0 +1,5 @@
+# These are supported funding model platforms
+
+github: # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: retrooper
+custom: ['https://paypal.me/retrooperdev']

.github/ISSUE_TEMPLATE/bug_report.md

@@ -0,0 +1,41 @@
+---
+name: Bug report
+about: Report a bug to help us fix
+title: "[BUG REPORT]"
+labels: bug
+assignees: ''
+
+---
+
+**Describe the bug**
+A clear and concise description of what the bug is.
+
+**To Reproduce**
+Steps to reproduce the behavior:
+*Example:*
+1. Login on the 1.16.4 minecraft client.
+2. Join the server while it is still starting up.
+3. ....
+4. See error
+
+**Expected behavior**
+A clear and concise description of what you expected to happen.
+
+**Screenshots**
+If applicable, add screenshots to help explain your problem.
+
+**About your server (please complete the following information):**
+ - Spigot: [eg. Paper or Tuinity]
+    We only accept reports that are reproducible
+    on one of the supported spigots.
+ 
+- Server Version: [eg. 1.16.4]
+    Feel free to report bugs for versions newer than 1.7.10, even if we
+    don’t support them yet, but be aware that we might have already
+    found the bug and fixed it in a dev build, just before you reported it.
+    Please don’t get frustrated in such cases.
+
+- Plugins List if possible: [eg. ViaVersion, ProtocolLib, HolographicDisplays]
+
+**Additional context**
+Add any other context about the problem here.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -0,0 +1,21 @@
+---
+name: Feature request
+about: Suggest an idea for this project
+title: FEATURE REQUEST
+labels: enhancement
+assignees: ''
+
+---
+
+**Is your feature request related to a problem? Please describe.**
+A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
+
+**Describe the solution you'd like**
+A clear and concise description of what you want to happen.
+
+**Describe alternatives you've considered to solve your solution without
+us adding this as a feature?**
+A clear and concise description of any alternative solutions or features you've considered.
+
+**Additional context**
+Add any other context or screenshots about the feature request here.

.github/workflows/codeql-analysis.yml

@@ -0,0 +1,67 @@
+# For most projects, this workflow file will not need changing; you simply need
+# to commit it to your repository.
+#
+# You may wish to alter this file to override the set of languages analyzed,
+# or to provide custom queries or build logic.
+#
+# ******** NOTE ********
+# We have attempted to detect the languages in your repository. Please check
+# the `language` matrix defined below to confirm you have the correct set of
+# supported CodeQL languages.
+#
+name: "CodeQL"
+
+on:
+  push:
+    branches: [ master, dev ]
+  pull_request:
+    # The branches below must be a subset of the branches above
+    branches: [ master, dev ]
+  schedule:
+    - cron: '39 0 * * 0'
+
+jobs:
+  analyze:
+    name: Analyze
+    runs-on: ubuntu-latest
+
+    strategy:
+      fail-fast: false
+      matrix:
+        language: [ 'java' ]
+        # CodeQL supports [ 'cpp', 'csharp', 'go', 'java', 'javascript', 'python' ]
+        # Learn more:
+        # https://docs.github.com/en/free-pro-team@latest/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#changing-the-languages-that-are-analyzed
+
+    steps:
+    - name: Checkout repository
+      uses: actions/checkout@v2
+
+    # Initializes the CodeQL tools for scanning.
+    - name: Initialize CodeQL
+      uses: github/codeql-action/init@v1
+      with:
+        languages: ${{ matrix.language }}
+        # If you wish to specify custom queries, you can do so here or in a config file.
+        # By default, queries listed here will override any specified in a config file.
+        # Prefix the list here with "+" to use these queries and those in the config file.
+        # queries: ./path/to/local/query, your-org/your-repo/queries@main
+
+    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # If this step fails, then you should remove it and run the build manually (see below)
+    - name: Autobuild
+      uses: github/codeql-action/autobuild@v1
+
+    # ℹ️ Command-line programs to run using the OS shell.
+    # 📚 https://git.io/JvXDl
+
+    # ✏️ If the Autobuild fails above, remove it and uncomment the following three lines
+    #    and modify them (or add more) to build your code if your project
+    #    uses a compiled language
+
+    #- run: |
+    #   make bootstrap
+    #   make release
+
+    - name: Perform CodeQL Analysis
+      uses: github/codeql-action/analyze@v1

.gitignore

@@ -0,0 +1,113 @@
+#
+# JetBrains
+#
+
+# User-specific stuff
+.idea/**/workspace.xml
+.idea/**/tasks.xml
+.idea/**/usage.statistics.xml
+.idea/**/dictionaries
+.idea/**/shelf
+
+# Generated files
+.idea/**/contentModel.xml
+
+# Sensitive or high-churn files
+.idea/**/dataSources/
+.idea/**/dataSources.ids
+.idea/**/dataSources.local.xml
+.idea/**/sqlDataSources.xml
+.idea/**/dynamic.xml
+.idea/**/uiDesigner.xml
+.idea/**/dbnavigator.xml
+
+# Gradle
+.idea/**/gradle.xml
+.idea/**/libraries
+
+# Gradle and Maven with auto-import
+# When using Gradle or Maven with auto-import, you should exclude module files,
+# since they will be recreated, and may cause churn.  Uncomment if using
+# auto-import.
+# .idea/artifacts
+# .idea/compiler.xml
+# .idea/jarRepositories.xml
+# .idea/modules.xml
+# .idea/*.iml
+# .idea/modules
+# *.iml
+# *.ipr
+
+# CMake
+cmake-build-*/
+
+# Mongo Explorer plugin
+.idea/**/mongoSettings.xml
+
+# File-based project format
+*.iws
+
+# mpeltonen/sbt-idea plugin
+.idea_modules/
+
+# JIRA plugin
+atlassian-ide-plugin.xml
+
+# Cursive Clojure plugin
+.idea/replstate.xml
+
+# Crashlytics plugin (for Android Studio and IntelliJ)
+com_crashlytics_export_strings.xml
+crashlytics.properties
+crashlytics-build.properties
+fabric.properties
+
+# Editor-based Rest Client
+.idea/httpRequests
+
+# Android studio 3.1+ serialized cache file
+.idea/caches/build_file_checksums.ser
+
+
+#
+# Java
+#
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Mobile Tools for Java (J2ME)
+.mtj.tmp/
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+#
+# Maven
+#
+target/
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+# https://github.com/takari/maven-wrapper#usage-without-binary-jar
+.mvn/wrapper/maven-wrapper.jar

LICENSE

@@ -1,281 +1,622 @@
                     GNU GENERAL PUBLIC LICENSE
-                       Version 2, June 1991
+                       Version 3, 29 June 2007
 
- Copyright (C) 1989, 1991 Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
  Everyone is permitted to copy and distribute verbatim copies
  of this license document, but changing it is not allowed.
 
                             Preamble
 
-  The licenses for most software are designed to take away your
-freedom to share and change it.  By contrast, the GNU General Public
-License is intended to guarantee your freedom to share and change free
-software--to make sure the software is free for all its users.  This
-General Public License applies to most of the Free Software
-Foundation's software and to any other program whose authors commit to
-using it.  (Some other Free Software Foundation software is covered by
-the GNU Lesser General Public License instead.)  You can apply it to
+  The GNU General Public License is a free, copyleft license for
+software and other kinds of works.
+
+  The licenses for most software and other practical works are designed
+to take away your freedom to share and change the works.  By contrast,
+the GNU General Public License is intended to guarantee your freedom to
+share and change all versions of a program--to make sure it remains free
+software for all its users.  We, the Free Software Foundation, use the
+GNU General Public License for most of our software; it applies also to
+any other work released this way by its authors.  You can apply it to
 your programs, too.
 
   When we speak of free software, we are referring to freedom, not
 price.  Our General Public Licenses are designed to make sure that you
 have the freedom to distribute copies of free software (and charge for
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-if you want it, that you can change the software or use pieces of it
-in new free programs; and that you know you can do these things.
+them if you wish), that you receive source code or can get it if you
+want it, that you can change the software or use pieces of it in new
+free programs, and that you know you can do these things.
 
-  To protect your rights, we need to make restrictions that forbid
-anyone to deny you these rights or to ask you to surrender the rights.
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+  To protect your rights, we need to prevent others from denying you
+these rights or asking you to surrender the rights.  Therefore, you have
+certain responsibilities if you distribute copies of the software, or if
+you modify it: responsibilities to respect the freedom of others.
 
   For example, if you distribute copies of such a program, whether
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-you have.  You must make sure that they, too, receive or can get the
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-  We protect your rights with two steps: (1) copyright the software, and
-(2) offer you this license which gives you legal permission to copy,
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+  Developers that use the GNU GPL protect your rights with two steps:
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-  Finally, any free program is threatened constantly by software
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+pattern of such abuse occurs in the area of products for individuals to
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+stand ready to extend this provision to those domains in future versions
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+
+  Finally, every program is threatened constantly by software patents.
+States should not allow patents to restrict development and use of
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+make it effectively proprietary.  To prevent this, the GPL assures that
+patents cannot be used to render the program non-free.
 
   The precise terms and conditions for copying, distribution and
 modification follow.
 
-                    GNU GENERAL PUBLIC LICENSE
-   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+                       TERMS AND CONDITIONS
 
-  0. This License applies to any program or other work which contains
-a notice placed by the copyright holder saying it may be distributed
-under the terms of this General Public License.  The "Program", below,
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-that is to say, a work containing the Program or a portion of it,
-either verbatim or with modifications and/or translated into another
-language.  (Hereinafter, translation is included without limitation in
-the term "modification".)  Each licensee is addressed as "you".
+  0. Definitions.
 
-Activities other than copying, distribution and modification are not
-covered by this License; they are outside its scope.  The act of
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-is covered only if its contents constitute a work based on the
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+  "This License" refers to version 3 of the GNU General Public License.
 
-  1. You may copy and distribute verbatim copies of the Program's
-source code as you receive it, in any medium, provided that you
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-notices that refer to this License and to the absence of any warranty;
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+  "Copyright" also means copyright-like laws that apply to other kinds of
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+  To "modify" a work means to copy from or adapt all or part of the work
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+  An interactive user interface displays "Appropriate Legal Notices"
+to the extent that it includes a convenient and prominently visible
+feature that (1) displays an appropriate copyright notice, and (2)
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+  10. Automatic Licensing of Downstream Recipients.
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+  Each time you convey a covered work, the recipient automatically
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+
+  12. No Surrender of Others' Freedom.
+
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+  14. Revised Versions of this License.
 
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-
-  9. The Free Software Foundation may publish revised and/or new versions
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 be similar in spirit to the present version, but may differ in detail to
 address new problems or concerns.
 
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+  Each version is given a distinguishing version number.  If the
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+  If the Program specifies that a proxy can decide which future
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-                            NO WARRANTY
+  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.
 
-  11. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
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-PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
-REPAIR OR CORRECTION.
+  15. Disclaimer of Warranty.
 
-  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+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
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+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
 
@@ -287,15 +628,15 @@ 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
-convey the exclusion of warranty; and each file should have at least
+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
+    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 2 of the License, or
+    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,
@@ -303,37 +644,31 @@ the "copyright" line and a pointer to where the full notice is found.
     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, write to the Free Software Foundation, Inc.,
-    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
 Also add information on how to contact you by electronic and paper mail.
 
-If the program is interactive, make it output a short notice like this
-when it starts in an interactive mode:
+  If the program does terminal interaction, make it output a short
+notice like this when it starts in an interactive mode:
 
-    Gnomovision version 69, Copyright (C) year name of author
-    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    <program>  Copyright (C) <year>  <name of author>
+    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, the commands you use may
-be called something other than `show w' and `show c'; they could even be
-mouse-clicks or menu items--whatever suits your program.
+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 your
-school, if any, to sign a "copyright disclaimer" for the program, if
-necessary.  Here is a sample; alter the names:
+  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
+<https://www.gnu.org/licenses/>.
 
-  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
-  `Gnomovision' (which makes passes at compilers) written by James Hacker.
-
-  <signature of Ty Coon>, 1 April 1989
-  Ty Coon, President of Vice
-
-This 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.
+  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
+<https://www.gnu.org/licenses/why-not-lgpl.html>.

README.md

@@ -1,30 +1,29 @@
-# packetevents by retrooper
-
-A lightweight spigot packetlistener & packetsender coded by retrooper.
-
-## Credit
-
-PacketEvents uses [TinyProtocol](https://github.com/dmulloy2/ProtocolLib/blob/master/TinyProtocol)'s [Reflection](https://github.com/dmulloy2/ProtocolLib/blob/master/TinyProtocol/src/main/java/com/comphenix/tinyprotocol/Reflection.java) util class.
-
-[Find it here in our source](https://github.com/retrooper/packetevents/blob/master/src/main/java/io/github/retrooper/packetevents/reflectionutils/Reflection.java)
-
-PacketEvents forked [Atlas](https://github.com/funkemunky/Atlas)' [Packet](https://github.com/funkemunky/Atlas/blob/master/AtlasParent/Atlas/src/main/java/cc/funkemunky/api/tinyprotocol/api/Packet.java) class.
-
-[Find our forked version](https://github.com/retrooper/packetevents/blob/master/src/main/java/io/github/retrooper/packetevents/packet/PacketType.java)
-## About
-
-This packetlistener is **only** supported on spigot servers and has been tested to work on these spigot forks: PaperSpigot, Tuinity
-
-* No dependencies
-
-* Licensed under the GPL2 license.
-
-[![](https://img.shields.io/badge/License-GPLv2-blue.svg)](https://www.gnu.org/licenses/gpl-2.0)
-
-Join my discord server(to talk to me): https://discord.gg/ZWTkg4v
+# packetevents
 
+[![](https://img.shields.io/badge/License-GPLv3-yellow.svg)](https://github.com/retrooper/packetevents/blob/dev/LICENSE)
 [![](https://jitpack.io/v/retrooper/packetevents.svg)](https://jitpack.io/#retrooper/packetevents)
 
-To learn how to setup this API please click on the link below
-[Setup Guide](https://github.com/retrooper/packetevents/wiki/PacketEvents-Setup-Guide)
-(or just paste this into your browser: https://github.com/retrooper/packetevents/wiki/PacketEvents-Setup-Guide)
+PacketEvents is an open-source Packet API. It has many cross-version packet-wrappers. You can process incoming and outgoing packets on the server. You can even send packets with our packet-wrappers. We are here to save you a ton of time.
+
+### Resources
+* [SpigotMC](https://www.spigotmc.org/resources/packetevents-api.80279/)
+* [JavaDoc](https://packetevents.github.io/javadocs)
+
+### Setup
+[Learn more](https://github.com/retrooper/packetevents/wiki/1.-Setup)
+
+### Discord
+[Learn more](https://discord.me/packetevents)
+
+### Contributing/Forking
+[Learn more](https://github.com/retrooper/packetevents/wiki/2.-Contributing-and-Forking)\
+Our discord server has a role for contributors and forkers.
+
+### Sponsorships
+[![](https://www.ej-technologies.com/images/product_banners/jprofiler_small.png)](https://www.ej-technologies.com/products/jprofiler/overview.html)
+
+### Statistics
+PacketEvents collects statistics anonymously through bStats. Participation is completely optional and you can opt-out at any time, although it is really helpful in figuring out what environments the plugin is running in (i.e. versions of Spigot, Java), so I can adjust development accordingly.
+
+### Credit
+PacketEvents uses an injector that is extremely similar to ViaVersion's injector. I have included license and copyright holder notice in the files taken from ViaVersion. Thank you ViaVersion.

SUMMARY.md

@@ -0,0 +1,4 @@
+# Table of contents
+
+* [Initial page](README.md)
+

build.gradle

@@ -0,0 +1,92 @@
+plugins {
+    id 'java'
+    id 'maven-publish'
+}
+
+//gradle myJavadocs
+task myJavadocs(type: Javadoc) {
+    source = sourceSets.main.allJava
+    File projectDir = getProjectDir()
+    File javadocsDir = new File(projectDir.getParentFile().getAbsolutePath() + "/docs");
+    javadocsDir.mkdirs()
+    setDestinationDir(javadocsDir)
+}
+
+repositories {
+    mavenLocal()
+    maven {
+        url = uri('https://hub.spigotmc.org/nexus/content/repositories/snapshots/')
+    }
+
+    maven {
+        url 'https://papermc.io/repo/repository/maven-public/'
+    }
+
+    maven {
+        url 'https://repo.opencollab.dev/maven-snapshots/'
+    }
+
+    maven {
+        url 'https://repo.opencollab.dev/maven-releases/'
+    }
+
+    maven {
+        url = uri('https://jitpack.io/')
+    }
+
+    maven {
+        url = uri('https://nexus.funkemunky.cc/content/repositories/releases/')
+    }
+
+    maven {
+        url = uri('https://repo.viaversion.com/')
+    }
+
+    maven {
+        url = uri('https://oss.sonatype.org/content/repositories/releases/')
+    }
+
+    maven {
+        url = uri('https://repo.maven.apache.org/maven2/')
+    }
+}
+
+dependencies {
+    implementation 'org.jetbrains:annotations:20.1.0'
+
+    compileOnly 'org.spigotmc:spigot-api:1.17.1-R0.1-SNAPSHOT'
+    compileOnly 'com.destroystokyo.paper:paper-api:1.16.5-R0.1-SNAPSHOT'
+    compileOnly 'org.geysermc:connector:1.2.1-SNAPSHOT'
+    compileOnly 'us.myles:viaversion:3.2.0'
+    compileOnly 'com.github.ProtocolSupport:ProtocolSupport:3d24efeda6'
+
+    /*compileOnly 'org.github.spigot:1.16.2:1.16.2'
+   compileOnly 'org.github.spigot:1.8.8:1.8.8'
+   compileOnly 'org.github.spigot:1.7.10:1.7.10'*/
+    compileOnly 'org.github.spigot:1.16.2:1.16.2'
+    compileOnly 'org.github.spigot:1.13.2:1.13.2'
+    compileOnly 'org.github.spigot:1.13:1.13'
+    compileOnly 'org.github.spigot:1.12.2:1.12.2'
+    compileOnly 'org.github.spigot:1.9.4:1.9.4'
+    compileOnly 'org.github.spigot:1.9:1.9'
+    compileOnly 'org.github.spigot:1.8.8:1.8.8'
+    compileOnly 'org.github.spigot:1.7.10:1.7.10'
+
+}
+
+group = 'io.github.retrooper'
+version = '1.8-pre-17'
+description = 'packetevents'
+java.sourceCompatibility = JavaVersion.VERSION_1_8
+
+publishing {
+    publications {
+        maven(MavenPublication) {
+            from(components.java)
+        }
+    }
+}
+
+tasks.withType(JavaCompile) {
+    options.encoding = 'UTF-8'
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,5 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-7.0-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,185 @@
+#!/usr/bin/env sh
+
+#
+# Copyright 2015 the original author or authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+##
+##  Gradle start up script for UN*X
+##
+##############################################################################
+
+# Attempt to set APP_HOME
+# Resolve links: $0 may be a link
+PRG="$0"
+# Need this for relative symlinks.
+while [ -h "$PRG" ] ; do
+    ls=`ls -ld "$PRG"`
+    link=`expr "$ls" : '.*-> \(.*\)$'`
+    if expr "$link" : '/.*' > /dev/null; then
+        PRG="$link"
+    else
+        PRG=`dirname "$PRG"`"/$link"
+    fi
+done
+SAVED="`pwd`"
+cd "`dirname \"$PRG\"`/" >/dev/null
+APP_HOME="`pwd -P`"
+cd "$SAVED" >/dev/null
+
+APP_NAME="Gradle"
+APP_BASE_NAME=`basename "$0"`
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD="maximum"
+
+warn () {
+    echo "$*"
+}
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+}
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "`uname`" in
+  CYGWIN* )
+    cygwin=true
+    ;;
+  Darwin* )
+    darwin=true
+    ;;
+  MINGW* )
+    msys=true
+    ;;
+  NONSTOP* )
+    nonstop=true
+    ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD="$JAVA_HOME/jre/sh/java"
+    else
+        JAVACMD="$JAVA_HOME/bin/java"
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD="java"
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if [ "$cygwin" = "false" -a "$darwin" = "false" -a "$nonstop" = "false" ] ; then
+    MAX_FD_LIMIT=`ulimit -H -n`
+    if [ $? -eq 0 ] ; then
+        if [ "$MAX_FD" = "maximum" -o "$MAX_FD" = "max" ] ; then
+            MAX_FD="$MAX_FD_LIMIT"
+        fi
+        ulimit -n $MAX_FD
+        if [ $? -ne 0 ] ; then
+            warn "Could not set maximum file descriptor limit: $MAX_FD"
+        fi
+    else
+        warn "Could not query maximum file descriptor limit: $MAX_FD_LIMIT"
+    fi
+fi
+
+# For Darwin, add options to specify how the application appears in the dock
+if $darwin; then
+    GRADLE_OPTS="$GRADLE_OPTS \"-Xdock:name=$APP_NAME\" \"-Xdock:icon=$APP_HOME/media/gradle.icns\""
+fi
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if [ "$cygwin" = "true" -o "$msys" = "true" ] ; then
+    APP_HOME=`cygpath --path --mixed "$APP_HOME"`
+    CLASSPATH=`cygpath --path --mixed "$CLASSPATH"`
+
+    JAVACMD=`cygpath --unix "$JAVACMD"`
+
+    # We build the pattern for arguments to be converted via cygpath
+    ROOTDIRSRAW=`find -L / -maxdepth 1 -mindepth 1 -type d 2>/dev/null`
+    SEP=""
+    for dir in $ROOTDIRSRAW ; do
+        ROOTDIRS="$ROOTDIRS$SEP$dir"
+        SEP="|"
+    done
+    OURCYGPATTERN="(^($ROOTDIRS))"
+    # Add a user-defined pattern to the cygpath arguments
+    if [ "$GRADLE_CYGPATTERN" != "" ] ; then
+        OURCYGPATTERN="$OURCYGPATTERN|($GRADLE_CYGPATTERN)"
+    fi
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    i=0
+    for arg in "$@" ; do
+        CHECK=`echo "$arg"|egrep -c "$OURCYGPATTERN" -`
+        CHECK2=`echo "$arg"|egrep -c "^-"`                                 ### Determine if an option
+
+        if [ $CHECK -ne 0 ] && [ $CHECK2 -eq 0 ] ; then                    ### Added a condition
+            eval `echo args$i`=`cygpath --path --ignore --mixed "$arg"`
+        else
+            eval `echo args$i`="\"$arg\""
+        fi
+        i=`expr $i + 1`
+    done
+    case $i in
+        0) set -- ;;
+        1) set -- "$args0" ;;
+        2) set -- "$args0" "$args1" ;;
+        3) set -- "$args0" "$args1" "$args2" ;;
+        4) set -- "$args0" "$args1" "$args2" "$args3" ;;
+        5) set -- "$args0" "$args1" "$args2" "$args3" "$args4" ;;
+        6) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" ;;
+        7) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" ;;
+        8) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" ;;
+        9) set -- "$args0" "$args1" "$args2" "$args3" "$args4" "$args5" "$args6" "$args7" "$args8" ;;
+    esac
+fi
+
+# Escape application args
+save () {
+    for i do printf %s\\n "$i" | sed "s/'/'\\\\''/g;1s/^/'/;\$s/\$/' \\\\/" ; done
+    echo " "
+}
+APP_ARGS=`save "$@"`
+
+# Collect all arguments for the java command, following the shell quoting and substitution rules
+eval set -- $DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS "\"-Dorg.gradle.appname=$APP_BASE_NAME\"" -classpath "\"$CLASSPATH\"" org.gradle.wrapper.GradleWrapperMain "$APP_ARGS"
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,89 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%" == "" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%" == "" set DIRNAME=.
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if "%ERRORLEVEL%" == "0" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if "%ERRORLEVEL%"=="0" goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+exit /b 1
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

pom.xml

@@ -1,202 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<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>
-
-    <groupId>io.github.retrooper</groupId>
-    <artifactId>packetevents</artifactId>
-    <version>1.3.5.1</version>
-    <packaging>jar</packaging>
-    <name>packetevents</name>
-    <properties>
-        <java.version>1.8</java.version>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    </properties>
-
-    <build>
-        <defaultGoal>clean package</defaultGoal>
-        <plugins>
-            <plugin>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.7.0</version>
-                <configuration>
-                    <source>1.8</source>
-                    <target>1.8</target>
-                </configuration>
-            </plugin>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-compiler-plugin</artifactId>
-                <version>3.7.0</version>
-                <configuration>
-                    <source>${java.version}</source>
-                    <target>${java.version}</target>
-                </configuration>
-            </plugin>
-        </plugins>
-        <resources>
-            <resource>
-                <directory>src/main/resources</directory>
-                <filtering>true</filtering>
-            </resource>
-        </resources>
-    </build>
-
-    <repositories>
-        <repository>
-            <id>spigot-repo</id>
-            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
-        </repository>
-        <repository>
-            <id>jitpack.io</id>
-            <url>https://jitpack.io</url>
-        </repository>
-        <repository>
-            <id>funkemunky-releases</id>
-            <url>https://nexus.funkemunky.cc/content/repositories/releases/</url>
-        </repository>
-        <repository>
-            <id>viaversion-repo</id>
-            <url>https://repo.viaversion.com</url>
-        </repository>
-    </repositories>
-
-
-    <dependencies>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.14.1</artifactId>
-            <version>1.14.1</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.15.1</artifactId>
-            <version>1.15.1</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.14.3</artifactId>
-            <version>1.14.3</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.14.2</artifactId>
-            <version>1.14.2</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.15</artifactId>
-            <version>1.15</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.15.2</artifactId>
-            <version>1.15.2</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.13.2</artifactId>
-            <version>1.13.2</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.7.10</artifactId>
-            <version>1.7.10</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.8</artifactId>
-            <version>1.8</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.8.3</artifactId>
-            <version>1.8.3</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.8.8</artifactId>
-            <version>1.8.8</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.9</artifactId>
-            <version>1.9</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.9.4</artifactId>
-            <version>1.9.4</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.10.2</artifactId>
-            <version>1.10.2</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.11.1</artifactId>
-            <version>1.11.1</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.11.2</artifactId>
-            <version>1.11.2</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.12.1</artifactId>
-            <version>1.12.1</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.12.2</artifactId>
-            <version>1.12.2</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.13</artifactId>
-            <version>1.13</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>org.github.spigot</groupId>
-            <artifactId>1.14</artifactId>
-            <version>1.14</version>
-            <scope>provided</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>us.myles</groupId>
-            <artifactId>viaversion</artifactId>
-            <version>3.0.1</version>
-            <scope>provided</scope>
-        </dependency>
-
-        <dependency>
-            <groupId>com.github.ProtocolSupport</groupId>
-            <artifactId>ProtocolSupport</artifactId>
-            <version>4fdd683</version>
-            <scope>provided</scope>
-        </dependency>
-    </dependencies>
-</project>

settings.gradle

@@ -0,0 +1,5 @@
+/*
+ * This file was generated by the Gradle 'init' task.
+ */
+
+rootProject.name = 'packetevents'

src/main/java/io/github/retrooper/packetevents/PacketEvents.java

@@ -1,275 +1,366 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
 package io.github.retrooper.packetevents;
 
-import io.github.retrooper.packetevents.annotations.NotNull;
-import io.github.retrooper.packetevents.annotations.Nullable;
-import io.github.retrooper.packetevents.annotations.PacketHandler;
-import io.github.retrooper.packetevents.enums.ClientVersion;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.event.PacketListener;
-import io.github.retrooper.packetevents.event.impl.*;
+import io.github.retrooper.packetevents.bstats.Metrics;
+import io.github.retrooper.packetevents.event.impl.PostPlayerInjectEvent;
 import io.github.retrooper.packetevents.event.manager.EventManager;
-import io.github.retrooper.packetevents.handler.NettyPacketHandler;
-import io.github.retrooper.packetevents.packet.Packet;
-import io.github.retrooper.packetevents.packet.PacketType;
-import io.github.retrooper.packetevents.packetwrappers.Sendable;
-import io.github.retrooper.packetevents.utils.NMSUtils;
+import io.github.retrooper.packetevents.event.manager.PEEventManager;
+import io.github.retrooper.packetevents.exceptions.PacketEventsLoadFailureException;
+import io.github.retrooper.packetevents.injector.GlobalChannelInjector;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.packetwrappers.play.out.entityequipment.WrappedPacketOutEntityEquipment;
+import io.github.retrooper.packetevents.processor.BukkitEventProcessorInternal;
+import io.github.retrooper.packetevents.processor.PacketProcessorInternal;
+import io.github.retrooper.packetevents.settings.PacketEventsSettings;
+import io.github.retrooper.packetevents.updatechecker.UpdateChecker;
+import io.github.retrooper.packetevents.utils.entityfinder.EntityFinderUtils;
+import io.github.retrooper.packetevents.utils.guava.GuavaUtils;
+import io.github.retrooper.packetevents.utils.netty.bytebuf.ByteBufUtil;
+import io.github.retrooper.packetevents.utils.netty.bytebuf.ByteBufUtil_7;
+import io.github.retrooper.packetevents.utils.netty.bytebuf.ByteBufUtil_8;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.player.PlayerUtils;
+import io.github.retrooper.packetevents.utils.server.ServerUtils;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+import io.github.retrooper.packetevents.utils.version.PEVersion;
 import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.entity.Entity;
 import org.bukkit.entity.Player;
-import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
-import org.bukkit.event.player.PlayerJoinEvent;
-import org.bukkit.event.player.PlayerMoveEvent;
 import org.bukkit.plugin.Plugin;
-import org.bukkit.scheduler.BukkitTask;
+import org.bukkit.plugin.ServicePriority;
+import org.bukkit.plugin.java.JavaPlugin;
 
-import java.lang.reflect.InvocationTargetException;
-import java.util.HashMap;
-import java.util.UUID;
+import java.util.concurrent.ExecutorService;
+import java.util.concurrent.atomic.AtomicBoolean;
 
-public final class PacketEvents implements PacketListener, Listener {
-
-    private static final ServerVersion version = ServerVersion.getVersion();
-    private static final EventManager eventManager = new EventManager();
-    private static boolean hasRegistered;
+public final class PacketEvents implements Listener, EventManager {
     private static PacketEvents instance;
-    private static int currentTick;
-    private static BukkitTask serverTickTask;
+    private static Plugin plugin;
+    private final PEVersion version = new PEVersion(1, 7, 9, 17);
+    private final EventManager eventManager = new PEEventManager();
+    private final PlayerUtils playerUtils = new PlayerUtils();
+    private final ServerUtils serverUtils = new ServerUtils();
+    private final PacketProcessorInternal packetProcessorInternal = new PacketProcessorInternal();
+    private final BukkitEventProcessorInternal bukkitEventProcessorInternal = new BukkitEventProcessorInternal();
+    private final GlobalChannelInjector injector = new GlobalChannelInjector();
+    private final AtomicBoolean injectorReady = new AtomicBoolean();
+    private String handlerName;
+    private PacketEventsSettings settings = new PacketEventsSettings();
+    private ByteBufUtil byteBufUtil;
+    private UpdateChecker updateChecker;
+    private volatile boolean loading, loaded;
+    private boolean initialized, initializing, terminating;
+    private boolean lateBind = false;
 
-    private static final HashMap<UUID, ClientVersion> clientVersionsMap = new HashMap<UUID, ClientVersion>();
+    public static PacketEvents create(final Plugin plugin) {
+        if (Bukkit.isPrimaryThread()) {
+            //We are on the main thread
+            if (!Bukkit.getServicesManager().isProvidedFor(PacketEvents.class)) {
+                //We can register in the service manager.
+                instance = new PacketEvents();
+                Bukkit.getServicesManager().register(PacketEvents.class, instance,
+                        plugin, ServicePriority.Normal);
+                PacketEvents.plugin = plugin;
+                return instance;
+            } else {
+                //We have already registered. Let us load what was registered.
+                return instance = Bukkit.getServicesManager().load(PacketEvents.class);
+            }
+        } else {
+            //We are off thread, we cannot use the service manager.
+            if (instance == null) {
+                PacketEvents.plugin = plugin;
+                instance = new PacketEvents();
+            }
+            return instance;
+        }
+    }
 
-    public static EventManager getEventManager() {
-        return eventManager;
+    public static PacketEvents get() {
+        return instance;
+    }
+
+    @Deprecated
+    public static PacketEvents getAPI() {
+        return instance;
     }
 
 
-    /**
-     * Starts the server tick task and initiates the TinyProtocolHandler
-     *
-     * @param plugin
-     */
-    public static void start(final Plugin plugin) {
-        if (!hasRegistered) {
-            //Register Bukkit and PacketListener
-            getEventManager().registerListener(getInstance());
+    public void load() {
+        if (!loaded && !loading) {
+            loading = true;
+            //Resolve server version and cache
+            ServerVersion version = ServerVersion.getVersion();
+            WrappedPacket.version = version;
+            NMSUtils.version = version;
+            EntityFinderUtils.version = version;
+            handlerName = "pe-" + plugin.getName();
+            try {
+                NMSUtils.load();
 
-            Bukkit.getPluginManager().registerEvents(getInstance(), plugin);
+                PacketTypeClasses.load();
 
-            //Start the server tick task
-            final Runnable tickRunnable = new Runnable() {
-                @Override
-                public void run() {
-                    getEventManager().callEvent(new ServerTickEvent(currentTick++, PacketEvents.highlyPreciseMillis()));
+                PacketType.load();
+
+                EntityFinderUtils.load();
+
+                getServerUtils().entityCache = GuavaUtils.makeMap();
+
+                if (version.isNewerThanOrEquals(ServerVersion.v_1_9)) {
+                    for (WrappedPacketOutEntityEquipment.EquipmentSlot slot : WrappedPacketOutEntityEquipment.EquipmentSlot.values()) {
+                        slot.id = (byte) slot.ordinal();
+                    }
+                } else {
+                    WrappedPacketOutEntityEquipment.EquipmentSlot.MAINHAND.id = 0;
+                    WrappedPacketOutEntityEquipment.EquipmentSlot.OFFHAND.id = -1; //Invalid
+                    WrappedPacketOutEntityEquipment.EquipmentSlot.BOOTS.id = 1;
+                    WrappedPacketOutEntityEquipment.EquipmentSlot.LEGGINGS.id = 2;
+                    WrappedPacketOutEntityEquipment.EquipmentSlot.CHESTPLATE.id = 3;
+                    WrappedPacketOutEntityEquipment.EquipmentSlot.HELMET.id = 4;
+                }
+            } catch (Exception ex) {
+                loading = false;
+                throw new PacketEventsLoadFailureException(ex);
+            }
+
+            byteBufUtil = NMSUtils.legacyNettyImportMode ? new ByteBufUtil_7() : new ByteBufUtil_8();
+            updateChecker = new UpdateChecker();
+            if (!injectorReady.get()) {
+                injector.load();
+                lateBind = !injector.isBound();
+                //If late-bind is enabled, we will inject a bit later.
+                if (!lateBind) {
+                    injector.inject();
+                }
+                injectorReady.set(true);
+            }
+
+            loaded = true;
+            loading = false;
+        }
+    }
+
+    public void loadAsyncNewThread() {
+        new Thread(this::load).start();
+    }
+
+    public void loadAsync(ExecutorService executorService) {
+        executorService.execute(this::load);
+    }
+
+    public void loadSettings(PacketEventsSettings settings) {
+        this.settings = settings;
+    }
+
+    public void init() {
+        init(getSettings());
+    }
+
+    public void init(PacketEventsSettings packetEventsSettings) {
+        //Load if we haven't loaded already
+        load();
+        if (!initialized && !initializing) {
+            initializing = true;
+            settings = packetEventsSettings;
+            settings.lock();
+
+            if (settings.shouldCheckForUpdates()) {
+                handleUpdateCheck();
+            }
+
+            if (settings.isbStatsEnabled()) {
+                Metrics metrics = new Metrics((JavaPlugin) getPlugin(), 11327);
+            }
+
+            //We must wait for the injector to initialize.
+
+            //Wait for the injector to be ready.
+            while (!injectorReady.get()) {
+            }
+
+            Runnable postInjectTask = () -> {
+                Bukkit.getPluginManager().registerEvents(bukkitEventProcessorInternal, plugin);
+                for (final Player p : Bukkit.getOnlinePlayers()) {
+                    try {
+                        injector.injectPlayer(p);
+                        getEventManager().callEvent(new PostPlayerInjectEvent(p, false));
+                    } catch (Exception ex) {
+                        p.kickPlayer("Failed to inject... Please rejoin!");
+                    }
                 }
             };
-            serverTickTask = Bukkit.getScheduler().runTaskTimerAsynchronously(plugin, tickRunnable, 0L, 1L);
-            hasRegistered = true;
+
+            if (lateBind) {
+                //If late-bind is enabled, we still need to inject (after all plugins enabled).
+                Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, injector::inject);
+                Bukkit.getScheduler().scheduleSyncDelayedTask(plugin, postInjectTask);
+            } else {
+                postInjectTask.run();
+            }
+
+            initialized = true;
+            initializing = false;
+        }
+    }
+
+    @Deprecated
+    public void init(Plugin plugin) {
+        init(plugin, settings);
+    }
+
+    @Deprecated
+    public void init(Plugin pl, PacketEventsSettings packetEventsSettings) {
+        init(packetEventsSettings);
+    }
+
+    public void terminate() {
+        if (initialized && !terminating) {
+            //Eject all players
+            for (Player p : Bukkit.getOnlinePlayers()) {
+                injector.ejectPlayer(p);
+            }
+            //Eject the injector if needed
+            injector.eject();
+            //Unregister all our listeners
+            getEventManager().unregisterAllListeners();
+            initialized = false;
+            terminating = false;
         }
     }
 
     /**
-     * Stop all tasks and unregisters all PacketEvents' listeners
-     */
-    public static void stop() {
-        if (serverTickTask != null) {
-            serverTickTask.cancel();
-        }
-        getEventManager().unregisterAllListeners();
-    }
-
-    /**
-     * Get the server's version
+     * Use {@link #terminate()}. This is deprecated
      *
-     * @return version
+     * @deprecated "Stop" might be misleading and "terminate" sounds better I guess...
      */
-    public static ServerVersion getServerVersion() {
+    @Deprecated
+    public void stop() {
+        terminate();
+    }
+
+    public boolean isLoading() {
+        return loading;
+    }
+
+    public boolean hasLoaded() {
+        return loaded;
+    }
+
+    public boolean isTerminating() {
+        return terminating;
+    }
+
+    @Deprecated
+    public boolean isStopping() {
+        return isTerminating();
+    }
+
+    public boolean isInitializing() {
+        return initializing;
+    }
+
+    public boolean isInitialized() {
+        return initialized;
+    }
+
+    public Plugin getPlugin() {
+        return plugin;
+    }
+
+    public GlobalChannelInjector getInjector() {
+        return injector;
+    }
+
+    public PacketProcessorInternal getInternalPacketProcessor() {
+        return packetProcessorInternal;
+    }
+
+    public String getHandlerName() {
+        return handlerName;
+    }
+
+    public PacketEventsSettings getSettings() {
+        return settings;
+    }
+
+    public PEVersion getVersion() {
         return version;
     }
 
-    /**
-     * Returns the server tick task, you may cancel it if you wish.
-     * To cancel it do PacketEvents.getServerTickTask().cancel();
-     * <p>
-     * This bukkit task runs asynchronously every tick and is started in the start(plugin) function
-     *
-     * @return serverTickTask
-     */
-    public static BukkitTask getServerTickTask() {
-        return serverTickTask;
+    public EventManager getEventManager() {
+        return eventManager;
     }
 
-    /**
-     * Get an instance of the PacketEvents API class
-     *
-     * @return instance
-     */
-    public static PacketEvents getInstance() {
-        return instance == null ? instance = new PacketEvents() : instance;
+    public PlayerUtils getPlayerUtils() {
+        return playerUtils;
     }
 
+    public ServerUtils getServerUtils() {
+        return serverUtils;
+    }
 
-    /**
-     * Get the server's recent TPS values
-     * TPS stands for ticks per second.
-     * See to learn more about TPS<a href="https://apexminecrafthosting.com/what-is-minecraft-tps/">"https://apexminecrafthosting.com/what-is-minecraft-tps/"</a>
-     *
-     * @return recentTPS[]
-     */
-    public static double[] getRecentServerTPS() {
-        double[] tpsArray = new double[0];
-        try {
-            tpsArray = NMSUtils.recentTPS();
-        } catch (IllegalAccessException | InvocationTargetException e) {
-            e.printStackTrace();
+    public ByteBufUtil getByteBufUtil() {
+        return byteBufUtil;
+    }
+
+    public UpdateChecker getUpdateChecker() {
+        return updateChecker;
+    }
+
+    private void handleUpdateCheck() {
+        if (updateChecker == null) {
+            updateChecker = new UpdateChecker();
         }
-        return tpsArray;
+        Thread thread = new Thread(() -> {
+            getPlugin().getLogger().info("[packetevents] Checking for an update, please wait...");
+            UpdateChecker.UpdateCheckerStatus status = updateChecker.checkForUpdate();
+            int seconds = 5;
+            int retryCount = 5;
+            for (int i = 0; i < retryCount; i++) {
+                if (status != UpdateChecker.UpdateCheckerStatus.FAILED) {
+                    break;
+                }
+                getPlugin().getLogger().severe("[packetevents] Checking for an update again in " + seconds + " seconds...");
+                try {
+                    Thread.sleep(seconds * 1000L);
+                } catch (InterruptedException e) {
+                    e.printStackTrace();
+                }
+
+                seconds *= 2;
+
+                status = updateChecker.checkForUpdate();
+
+                if (i == (retryCount - 1)) {
+                    getPlugin().getLogger().severe("[packetevents] PacketEvents failed to check for an update. No longer retrying.");
+                    break;
+                }
+
+            }
+
+        }, "packetevents-update-check-thread");
+        thread.start();
     }
 
-    /**
-     * Get the server's current TPS
-     * TPS stands for ticks per second.
-     * See to learn more about TPS <a href="https://apexminecrafthosting.com/what-is-minecraft-tps/">"https://apexminecrafthosting.com/what-is-minecraft-tps/"</a>
-     *
-     * @return {@link PacketEvents#getRecentServerTPS()[0]}
-     */
-    public static double getCurrentServerTPS() {
-        return getRecentServerTPS()[0];
-    }
-
-    /**
-     * Get the player's ping.
-     * Learn more about ping <a href="https://en.wikipedia.org/wiki/Ping_(networking_utility)">https://en.wikipedia.org/wiki/Ping_(networking_utility)</a>
-     *
-     * @param player
-     * @return ping
-     */
-    public static int getPing(@NotNull final Player player) {
-        return NMSUtils.getPlayerPing(player);
-    }
-
-    /**
-     * When to use this(nano / 1 million) over {@link System#currentTimeMillis()}
-     * This is preciser than System.currentTimeMillis(), System.currentTimeMillis() can be up to 50ms off on some operating systems, but using this isn't cheap.
-     * Java documentation recommend using nano time if you are measuring elapsed time.
-     * In this function nanoTime is divided by 1 million giving us milliseconds.
-     * It is also important to mention that using this method doesn't guarantee thread safety.
-     *
-     * @return nanoTime / 1 million
-     */
-    public static long highlyPreciseMillis() {
-        return System.nanoTime() / 1000000;
-    }
-
-
-    /**
-     * This is deprecated, use {@link #highlyPreciseMillis()} as they do the same thing, I just renamed the method.
-     */
-    @Deprecated
-    public static long currentCalculatedMS() {
-        return System.nanoTime() / 1000000;
-    }
-
-
-    /**
-     * Get the player's version.
-     * Do not call this method in the PlayerInjectEvent, it is safe to call it in the PostPlayerInjectEvent.
-     * The EntityPlayer object is null at that time, resulting in the version lookup to fail.
-     *
-     * @param player
-     * @return ClientVersion
-     */
-
-    @Nullable
-    public static ClientVersion getClientVersion(@NotNull final Player player) {
-        return getClientVersion(player.getUniqueId());
-    }
-
-    public static ClientVersion getClientVersion(@NotNull final UUID uuid) {
-        return clientVersionsMap.get(uuid);
-    }
-
-    /**
-     * Version independent player injection
-     *
-     * @param player
-     */
-    public static void injectPlayer(final Player player) {
-        final PlayerInjectEvent injectEvent = new PlayerInjectEvent(player);
-        PacketEvents.getEventManager().callEvent(injectEvent);
-        if (!injectEvent.isCancelled()) {
-            PacketEvents.getEventManager().callEvent(new PostPlayerInjectEvent(player));
-            NettyPacketHandler.injectPlayer(player);
-        }
-    }
-
-    /**
-     * Version independant player injection
-     *
-     * @param player
-     */
-    public static void uninjectPlayer(final Player player) {
-        final PlayerUninjectEvent uninjectEvent = new PlayerUninjectEvent(player);
-        PacketEvents.getEventManager().callEvent(uninjectEvent);
-        if(!uninjectEvent.isCancelled()) {
-            NettyPacketHandler.uninjectPlayer(player);
-        }
-    }
-
-    /**
-     * Returns whether we have injected the player
-     *
-     * @param player
-     * @return hasInjected
-     */
-    public static boolean hasInjected(final Player player) {
-        return NettyPacketHandler.hasInjected(player);
-    }
-
-    /**
-     * Send a wrapped sendable packet to a player
-     *
-     * @param player
-     * @param sendable
-     */
-    public static void sendPacket(final Player player, final Sendable sendable) {
-        NMSUtils.sendSendableWrapper(player, sendable);
-    }
-
-    /**
-     * Do not check the client version in or before the PlayerInjectEvent, use the PostPlayerInjectEvent.
-     * It is not recommended to do much in the PlayerInjectEvent, as some fields in the Player object are be null.
-     * Use the PostPlayerInjectEvent which is only called after the PlayerJoinEvent if the player was injected.
-     *
-     * @param e
-     */
-    @PacketHandler
-    public void onInject(final PlayerInjectEvent e) {
-        clientVersionsMap.put(e.getPlayer().getUniqueId(), e.getClientVersion());
-    }
-
-    @PacketHandler
-    public void onReceive(final PacketReceiveEvent e) {
-    }
-
-    /**
-     * Deprecated, please do not use this anymore
-     *
-     * @param e
-     */
-    @PacketHandler
-    public void onPostInject(final PostPlayerInjectEvent e) {
-
-    }
-
-    @EventHandler
-    public void onJoin(final PlayerJoinEvent e) {
-        if (!hasInjected(e.getPlayer())) {
-            injectPlayer(e.getPlayer());
-
-        }
-    }
-
-    @EventHandler
-    public void onMove(final PlayerMoveEvent e) {
-        PacketEvents.getEventManager().callEvent(new BukkitMoveEvent(e));
-    }
 }

src/main/java/io/github/retrooper/packetevents/PacketEventsPlugin.java

@@ -0,0 +1,48 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents;
+
+import io.github.retrooper.packetevents.settings.PacketEventsSettings;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class PacketEventsPlugin extends JavaPlugin {
+    @Override
+    public void onLoad() {
+        PacketEvents.create(this);
+        PacketEventsSettings settings = PacketEvents.get().getSettings();
+        settings
+                .fallbackServerVersion(ServerVersion.v_1_7_10)
+                .compatInjector(false)
+                .checkForUpdates(true)
+                .bStats(true);
+        PacketEvents.get().loadAsyncNewThread();
+        //You can do something here as it is loading
+    }
+
+    @Override
+    public void onEnable() {
+        PacketEvents.get().init();
+    }
+
+    @Override
+    public void onDisable() {
+        PacketEvents.get().terminate();
+    }
+}

src/main/java/io/github/retrooper/packetevents/annotations/NotNull.java

@@ -1,16 +0,0 @@
-package io.github.retrooper.packetevents.annotations;
-
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-
-/**
- * Is for sure not null.
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-public @interface NotNull {
-
-
-}

src/main/java/io/github/retrooper/packetevents/annotations/Nullable.java

@@ -1,16 +0,0 @@
-package io.github.retrooper.packetevents.annotations;
-
-
-import java.lang.annotation.Documented;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-
-/**
- * Could be null.
- */
-@Documented
-@Retention(RetentionPolicy.RUNTIME)
-public @interface Nullable {
-
-
-}

src/main/java/io/github/retrooper/packetevents/annotations/PacketHandler.java

@@ -1,17 +0,0 @@
-package io.github.retrooper.packetevents.annotations;
-
-import java.lang.annotation.ElementType;
-import java.lang.annotation.Retention;
-import java.lang.annotation.RetentionPolicy;
-import java.lang.annotation.Target;
-
-@Target(ElementType.METHOD)
-@Retention(RetentionPolicy.RUNTIME)
-/**
- * Just like Bukkit's @EventHandler, but for packets.
- * Make sure your class implements the PacketListener interface, and is registered!
- */
-public @interface PacketHandler {
-
-
-}

src/main/java/io/github/retrooper/packetevents/bstats/Metrics.java

@@ -0,0 +1,860 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.bstats;
+
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import javax.net.ssl.HttpsURLConnection;
+import java.io.*;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.*;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import java.util.logging.Level;
+import java.util.stream.Collectors;
+import java.util.zip.GZIPOutputStream;
+
+public class Metrics {
+
+    private final Plugin plugin;
+
+    private final MetricsBase metricsBase;
+
+    /**
+     * Creates a new Metrics instance.
+     *
+     * @param plugin    Your plugin instance.
+     * @param serviceId The id of the service. It can be found at <a
+     *                  href="https://bstats.org/what-is-my-plugin-id">What is my plugin id?</a>
+     */
+    public Metrics(JavaPlugin plugin, int serviceId) {
+        this.plugin = plugin;
+        // Get the config file
+        File bStatsFolder = new File(plugin.getDataFolder().getParentFile(), "bStats");
+        File configFile = new File(bStatsFolder, "config.yml");
+        YamlConfiguration config = YamlConfiguration.loadConfiguration(configFile);
+        if (!config.isSet("serverUuid")) {
+            config.addDefault("enabled", true);
+            config.addDefault("serverUuid", UUID.randomUUID().toString());
+            config.addDefault("logFailedRequests", false);
+            config.addDefault("logSentData", false);
+            config.addDefault("logResponseStatusText", false);
+            // Inform the server owners about bStats
+            config
+                    .options()
+                    .header(
+                            "bStats (https://bStats.org) collects some basic information for plugin authors, like how\n"
+                                    + "many people use their plugin and their total player count. It's recommended to keep bStats\n"
+                                    + "enabled, but if you're not comfortable with this, you can turn this setting off. There is no\n"
+                                    + "performance penalty associated with having metrics enabled, and data sent to bStats is fully\n"
+                                    + "anonymous.")
+                    .copyDefaults(true);
+            try {
+                config.save(configFile);
+            } catch (IOException ignored) {
+            }
+        }
+        // Load the data
+        boolean enabled = config.getBoolean("enabled", true);
+        String serverUUID = config.getString("serverUuid");
+        boolean logErrors = config.getBoolean("logFailedRequests", false);
+        boolean logSentData = config.getBoolean("logSentData", false);
+        boolean logResponseStatusText = config.getBoolean("logResponseStatusText", false);
+        metricsBase =
+                new MetricsBase(
+                        "bukkit",
+                        serverUUID,
+                        serviceId,
+                        enabled,
+                        this::appendPlatformData,
+                        this::appendServiceData,
+                        submitDataTask -> Bukkit.getScheduler().runTask(plugin, submitDataTask),
+                        plugin::isEnabled,
+                        (message, error) -> this.plugin.getLogger().log(Level.WARNING, message, error),
+                        (message) -> this.plugin.getLogger().log(Level.INFO, message),
+                        logErrors,
+                        logSentData,
+                        logResponseStatusText);
+    }
+
+    /**
+     * Adds a custom chart.
+     *
+     * @param chart The chart to add.
+     */
+    public void addCustomChart(CustomChart chart) {
+        metricsBase.addCustomChart(chart);
+    }
+
+    private void appendPlatformData(JsonObjectBuilder builder) {
+        builder.appendField("playerAmount", getPlayerAmount());
+        builder.appendField("onlineMode", Bukkit.getOnlineMode() ? 1 : 0);
+        builder.appendField("bukkitVersion", Bukkit.getVersion());
+        builder.appendField("bukkitName", Bukkit.getName());
+        builder.appendField("javaVersion", System.getProperty("java.version"));
+        builder.appendField("osName", System.getProperty("os.name"));
+        builder.appendField("osArch", System.getProperty("os.arch"));
+        builder.appendField("osVersion", System.getProperty("os.version"));
+        builder.appendField("coreCount", Runtime.getRuntime().availableProcessors());
+    }
+
+    private void appendServiceData(JsonObjectBuilder builder) {
+        builder.appendField("pluginVersion", plugin.getDescription().getVersion());
+    }
+
+    private int getPlayerAmount() {
+        try {
+            // Around MC 1.8 the return type was changed from an array to a collection,
+            // This fixes java.lang.NoSuchMethodError:
+            // org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Collection;
+            Method onlinePlayersMethod = Class.forName("org.bukkit.Server").getMethod("getOnlinePlayers");
+            return onlinePlayersMethod.getReturnType().equals(Collection.class)
+                    ? ((Collection<?>) onlinePlayersMethod.invoke(Bukkit.getServer())).size()
+                    : ((Player[]) onlinePlayersMethod.invoke(Bukkit.getServer())).length;
+        } catch (Exception e) {
+            // Just use the new method if the reflection failed
+            return Bukkit.getOnlinePlayers().size();
+        }
+    }
+
+    public static class MetricsBase {
+
+        /**
+         * The version of the Metrics class.
+         */
+        public static final String METRICS_VERSION = "2.2.1";
+
+        private static final ScheduledExecutorService scheduler =
+                Executors.newScheduledThreadPool(1, task -> new Thread(task, "bStats-Metrics"));
+
+        private static final String REPORT_URL = "https://bStats.org/api/v2/data/%s";
+
+        private final String platform;
+
+        private final String serverUuid;
+
+        private final int serviceId;
+
+        private final Consumer<JsonObjectBuilder> appendPlatformDataConsumer;
+
+        private final Consumer<JsonObjectBuilder> appendServiceDataConsumer;
+
+        private final Consumer<Runnable> submitTaskConsumer;
+
+        private final Supplier<Boolean> checkServiceEnabledSupplier;
+
+        private final BiConsumer<String, Throwable> errorLogger;
+
+        private final Consumer<String> infoLogger;
+
+        private final boolean logErrors;
+
+        private final boolean logSentData;
+
+        private final boolean logResponseStatusText;
+
+        private final Set<CustomChart> customCharts = new HashSet<>();
+
+        private final boolean enabled;
+
+        /**
+         * Creates a new MetricsBase class instance.
+         *
+         * @param platform                    The platform of the service.
+         * @param serviceId                   The id of the service.
+         * @param serverUuid                  The server uuid.
+         * @param enabled                     Whether or not data sending is enabled.
+         * @param appendPlatformDataConsumer  A consumer that receives a {@code JsonObjectBuilder} and
+         *                                    appends all platform-specific data.
+         * @param appendServiceDataConsumer   A consumer that receives a {@code JsonObjectBuilder} and
+         *                                    appends all service-specific data.
+         * @param submitTaskConsumer          A consumer that takes a runnable with the submit task. This can be
+         *                                    used to delegate the data collection to a another thread to prevent errors caused by
+         *                                    concurrency. Can be {@code null}.
+         * @param checkServiceEnabledSupplier A supplier to check if the service is still enabled.
+         * @param errorLogger                 A consumer that accepts log message and an error.
+         * @param infoLogger                  A consumer that accepts info log messages.
+         * @param logErrors                   Whether or not errors should be logged.
+         * @param logSentData                 Whether or not the sent data should be logged.
+         * @param logResponseStatusText       Whether or not the response status text should be logged.
+         */
+        public MetricsBase(
+                String platform,
+                String serverUuid,
+                int serviceId,
+                boolean enabled,
+                Consumer<JsonObjectBuilder> appendPlatformDataConsumer,
+                Consumer<JsonObjectBuilder> appendServiceDataConsumer,
+                Consumer<Runnable> submitTaskConsumer,
+                Supplier<Boolean> checkServiceEnabledSupplier,
+                BiConsumer<String, Throwable> errorLogger,
+                Consumer<String> infoLogger,
+                boolean logErrors,
+                boolean logSentData,
+                boolean logResponseStatusText) {
+            this.platform = platform;
+            this.serverUuid = serverUuid;
+            this.serviceId = serviceId;
+            this.enabled = enabled;
+            this.appendPlatformDataConsumer = appendPlatformDataConsumer;
+            this.appendServiceDataConsumer = appendServiceDataConsumer;
+            this.submitTaskConsumer = submitTaskConsumer;
+            this.checkServiceEnabledSupplier = checkServiceEnabledSupplier;
+            this.errorLogger = errorLogger;
+            this.infoLogger = infoLogger;
+            this.logErrors = logErrors;
+            this.logSentData = logSentData;
+            this.logResponseStatusText = logResponseStatusText;
+            checkRelocation();
+            if (enabled) {
+                startSubmitting();
+            }
+        }
+
+        /**
+         * Gzips the given string.
+         *
+         * @param str The string to gzip.
+         * @return The gzipped string.
+         */
+        private static byte[] compress(final String str) throws IOException {
+            if (str == null) {
+                return null;
+            }
+            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+            try (GZIPOutputStream gzip = new GZIPOutputStream(outputStream)) {
+                gzip.write(str.getBytes(StandardCharsets.UTF_8));
+            }
+            return outputStream.toByteArray();
+        }
+
+        public void addCustomChart(CustomChart chart) {
+            this.customCharts.add(chart);
+        }
+
+        private void startSubmitting() {
+            final Runnable submitTask =
+                    () -> {
+                        if (!enabled || !checkServiceEnabledSupplier.get()) {
+                            // Submitting data or service is disabled
+                            scheduler.shutdown();
+                            return;
+                        }
+                        if (submitTaskConsumer != null) {
+                            submitTaskConsumer.accept(this::submitData);
+                        } else {
+                            this.submitData();
+                        }
+                    };
+            // Many servers tend to restart at a fixed time at xx:00 which causes an uneven distribution
+            // of requests on the
+            // bStats backend. To circumvent this problem, we introduce some randomness into the initial
+            // and second delay.
+            // WARNING: You must not modify and part of this Metrics class, including the submit delay or
+            // frequency!
+            // WARNING: Modifying this code will get your plugin banned on bStats. Just don't do it!
+            long initialDelay = (long) (1000 * 60 * (3 + Math.random() * 3));
+            long secondDelay = (long) (1000 * 60 * (Math.random() * 30));
+            scheduler.schedule(submitTask, initialDelay, TimeUnit.MILLISECONDS);
+            scheduler.scheduleAtFixedRate(
+                    submitTask, initialDelay + secondDelay, 1000 * 60 * 30, TimeUnit.MILLISECONDS);
+        }
+
+        private void submitData() {
+            final JsonObjectBuilder baseJsonBuilder = new JsonObjectBuilder();
+            appendPlatformDataConsumer.accept(baseJsonBuilder);
+            final JsonObjectBuilder serviceJsonBuilder = new JsonObjectBuilder();
+            appendServiceDataConsumer.accept(serviceJsonBuilder);
+            JsonObjectBuilder.JsonObject[] chartData =
+                    customCharts.stream()
+                            .map(customChart -> customChart.getRequestJsonObject(errorLogger, logErrors))
+                            .filter(Objects::nonNull)
+                            .toArray(JsonObjectBuilder.JsonObject[]::new);
+            serviceJsonBuilder.appendField("id", serviceId);
+            serviceJsonBuilder.appendField("customCharts", chartData);
+            baseJsonBuilder.appendField("service", serviceJsonBuilder.build());
+            baseJsonBuilder.appendField("serverUUID", serverUuid);
+            baseJsonBuilder.appendField("metricsVersion", METRICS_VERSION);
+            JsonObjectBuilder.JsonObject data = baseJsonBuilder.build();
+            scheduler.execute(
+                    () -> {
+                        try {
+                            // Send the data
+                            sendData(data);
+                        } catch (Exception e) {
+                            // Something went wrong! :(
+                            if (logErrors) {
+                                errorLogger.accept("Could not submit bStats metrics data", e);
+                            }
+                        }
+                    });
+        }
+
+        private void sendData(JsonObjectBuilder.JsonObject data) throws Exception {
+            if (logSentData) {
+                infoLogger.accept("Sent bStats metrics data: " + data.toString());
+            }
+            String url = String.format(REPORT_URL, platform);
+            HttpsURLConnection connection = (HttpsURLConnection) new URL(url).openConnection();
+            // Compress the data to save bandwidth
+            byte[] compressedData = compress(data.toString());
+            connection.setRequestMethod("POST");
+            connection.addRequestProperty("Accept", "application/json");
+            connection.addRequestProperty("Connection", "close");
+            connection.addRequestProperty("Content-Encoding", "gzip");
+            connection.addRequestProperty("Content-Length", String.valueOf(compressedData.length));
+            connection.setRequestProperty("Content-Type", "application/json");
+            connection.setRequestProperty("User-Agent", "Metrics-Service/1");
+            connection.setDoOutput(true);
+            try (DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream())) {
+                outputStream.write(compressedData);
+            }
+            StringBuilder builder = new StringBuilder();
+            try (BufferedReader bufferedReader =
+                         new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+                String line;
+                while ((line = bufferedReader.readLine()) != null) {
+                    builder.append(line);
+                }
+            }
+            if (logResponseStatusText) {
+                infoLogger.accept("Sent data to bStats and received response: " + builder);
+            }
+        }
+
+        /**
+         * Checks that the class was properly relocated.
+         */
+        private void checkRelocation() {
+            // You can use the property to disable the check in your test environment
+            if (System.getProperty("bstats.relocatecheck") == null
+                    || !System.getProperty("bstats.relocatecheck").equals("false")) {
+                // Maven's Relocate is clever and changes strings, too. So we have to use this little
+                // "trick" ... :D
+                final String defaultPackage =
+                        new String(new byte[]{'o', 'r', 'g', '.', 'b', 's', 't', 'a', 't', 's'});
+                final String examplePackage =
+                        new String(new byte[]{'y', 'o', 'u', 'r', '.', 'p', 'a', 'c', 'k', 'a', 'g', 'e'});
+                // We want to make sure no one just copy & pastes the example and uses the wrong package
+                // names
+                if (MetricsBase.class.getPackage().getName().startsWith(defaultPackage)
+                        || MetricsBase.class.getPackage().getName().startsWith(examplePackage)) {
+                    throw new IllegalStateException("bStats Metrics class has not been relocated correctly!");
+                }
+            }
+        }
+    }
+
+    public static class AdvancedBarChart extends CustomChart {
+
+        private final Callable<Map<String, int[]>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public AdvancedBarChart(String chartId, Callable<Map<String, int[]>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, int[]> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, int[]> entry : map.entrySet()) {
+                if (entry.getValue().length == 0) {
+                    // Skip this invalid
+                    continue;
+                }
+                allSkipped = false;
+                valuesBuilder.appendField(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public static class SimpleBarChart extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SimpleBarChart(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                valuesBuilder.appendField(entry.getKey(), new int[]{entry.getValue()});
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public static class MultiLineChart extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public MultiLineChart(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                if (entry.getValue() == 0) {
+                    // Skip this invalid
+                    continue;
+                }
+                allSkipped = false;
+                valuesBuilder.appendField(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public static class AdvancedPie extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public AdvancedPie(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                if (entry.getValue() == 0) {
+                    // Skip this invalid
+                    continue;
+                }
+                allSkipped = false;
+                valuesBuilder.appendField(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public abstract static class CustomChart {
+
+        private final String chartId;
+
+        protected CustomChart(String chartId) {
+            if (chartId == null) {
+                throw new IllegalArgumentException("chartId must not be null");
+            }
+            this.chartId = chartId;
+        }
+
+        public JsonObjectBuilder.JsonObject getRequestJsonObject(
+                BiConsumer<String, Throwable> errorLogger, boolean logErrors) {
+            JsonObjectBuilder builder = new JsonObjectBuilder();
+            builder.appendField("chartId", chartId);
+            try {
+                JsonObjectBuilder.JsonObject data = getChartData();
+                if (data == null) {
+                    // If the data is null we don't send the chart.
+                    return null;
+                }
+                builder.appendField("data", data);
+            } catch (Throwable t) {
+                if (logErrors) {
+                    errorLogger.accept("Failed to get data for custom chart with id " + chartId, t);
+                }
+                return null;
+            }
+            return builder.build();
+        }
+
+        protected abstract JsonObjectBuilder.JsonObject getChartData() throws Exception;
+    }
+
+    public static class SingleLineChart extends CustomChart {
+
+        private final Callable<Integer> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SingleLineChart(String chartId, Callable<Integer> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            int value = callable.call();
+            if (value == 0) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("value", value).build();
+        }
+    }
+
+    public static class SimplePie extends CustomChart {
+
+        private final Callable<String> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SimplePie(String chartId, Callable<String> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            String value = callable.call();
+            if (value == null || value.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("value", value).build();
+        }
+    }
+
+    public static class DrilldownPie extends CustomChart {
+
+        private final Callable<Map<String, Map<String, Integer>>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId  The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public DrilldownPie(String chartId, Callable<Map<String, Map<String, Integer>>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        public JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Map<String, Integer>> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean reallyAllSkipped = true;
+            for (Map.Entry<String, Map<String, Integer>> entryValues : map.entrySet()) {
+                JsonObjectBuilder valueBuilder = new JsonObjectBuilder();
+                boolean allSkipped = true;
+                for (Map.Entry<String, Integer> valueEntry : map.get(entryValues.getKey()).entrySet()) {
+                    valueBuilder.appendField(valueEntry.getKey(), valueEntry.getValue());
+                    allSkipped = false;
+                }
+                if (!allSkipped) {
+                    reallyAllSkipped = false;
+                    valuesBuilder.appendField(entryValues.getKey(), valueBuilder.build());
+                }
+            }
+            if (reallyAllSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    /**
+     * An extremely simple JSON builder.
+     *
+     * <p>While this class is neither feature-rich nor the most performant one, it's sufficient enough
+     * for its use-case.
+     */
+    public static class JsonObjectBuilder {
+
+        private StringBuilder builder = new StringBuilder();
+
+        private boolean hasAtLeastOneField = false;
+
+        public JsonObjectBuilder() {
+            builder.append("{");
+        }
+
+        /**
+         * Escapes the given string like stated in https://www.ietf.org/rfc/rfc4627.txt.
+         *
+         * <p>This method escapes only the necessary characters '"', '\'. and '\u0000' - '\u001F'.
+         * Compact escapes are not used (e.g., '\n' is escaped as "\u000a" and not as "\n").
+         *
+         * @param value The value to escape.
+         * @return The escaped value.
+         */
+        private static String escape(String value) {
+            final StringBuilder builder = new StringBuilder();
+            for (int i = 0; i < value.length(); i++) {
+                char c = value.charAt(i);
+                if (c == '"') {
+                    builder.append("\\\"");
+                } else if (c == '\\') {
+                    builder.append("\\\\");
+                } else if (c <= '\u000F') {
+                    builder.append("\\u000").append(Integer.toHexString(c));
+                } else if (c <= '\u001F') {
+                    builder.append("\\u00").append(Integer.toHexString(c));
+                } else {
+                    builder.append(c);
+                }
+            }
+            return builder.toString();
+        }
+
+        /**
+         * Appends a null field to the JSON.
+         *
+         * @param key The key of the field.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendNull(String key) {
+            appendFieldUnescaped(key, "null");
+            return this;
+        }
+
+        /**
+         * Appends a string field to the JSON.
+         *
+         * @param key   The key of the field.
+         * @param value The value of the field.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, String value) {
+            if (value == null) {
+                throw new IllegalArgumentException("JSON value must not be null");
+            }
+            appendFieldUnescaped(key, "\"" + escape(value) + "\"");
+            return this;
+        }
+
+        /**
+         * Appends an integer field to the JSON.
+         *
+         * @param key   The key of the field.
+         * @param value The value of the field.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, int value) {
+            appendFieldUnescaped(key, String.valueOf(value));
+            return this;
+        }
+
+        /**
+         * Appends an object to the JSON.
+         *
+         * @param key    The key of the field.
+         * @param object The object.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, JsonObject object) {
+            if (object == null) {
+                throw new IllegalArgumentException("JSON object must not be null");
+            }
+            appendFieldUnescaped(key, object.toString());
+            return this;
+        }
+
+        /**
+         * Appends a string array to the JSON.
+         *
+         * @param key    The key of the field.
+         * @param values The string array.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, String[] values) {
+            if (values == null) {
+                throw new IllegalArgumentException("JSON values must not be null");
+            }
+            String escapedValues =
+                    Arrays.stream(values)
+                            .map(value -> "\"" + escape(value) + "\"")
+                            .collect(Collectors.joining(","));
+            appendFieldUnescaped(key, "[" + escapedValues + "]");
+            return this;
+        }
+
+        /**
+         * Appends an integer array to the JSON.
+         *
+         * @param key    The key of the field.
+         * @param values The integer array.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, int[] values) {
+            if (values == null) {
+                throw new IllegalArgumentException("JSON values must not be null");
+            }
+            String escapedValues =
+                    Arrays.stream(values).mapToObj(String::valueOf).collect(Collectors.joining(","));
+            appendFieldUnescaped(key, "[" + escapedValues + "]");
+            return this;
+        }
+
+        /**
+         * Appends an object array to the JSON.
+         *
+         * @param key    The key of the field.
+         * @param values The integer array.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, JsonObject[] values) {
+            if (values == null) {
+                throw new IllegalArgumentException("JSON values must not be null");
+            }
+            String escapedValues =
+                    Arrays.stream(values).map(JsonObject::toString).collect(Collectors.joining(","));
+            appendFieldUnescaped(key, "[" + escapedValues + "]");
+            return this;
+        }
+
+        /**
+         * Appends a field to the object.
+         *
+         * @param key          The key of the field.
+         * @param escapedValue The escaped value of the field.
+         */
+        private void appendFieldUnescaped(String key, String escapedValue) {
+            if (builder == null) {
+                throw new IllegalStateException("JSON has already been built");
+            }
+            if (key == null) {
+                throw new IllegalArgumentException("JSON key must not be null");
+            }
+            if (hasAtLeastOneField) {
+                builder.append(",");
+            }
+            builder.append("\"").append(escape(key)).append("\":").append(escapedValue);
+            hasAtLeastOneField = true;
+        }
+
+        /**
+         * Builds the JSON string and invalidates this builder.
+         *
+         * @return The built JSON string.
+         */
+        public JsonObject build() {
+            if (builder == null) {
+                throw new IllegalStateException("JSON has already been built");
+            }
+            JsonObject object = new JsonObject(builder.append("}").toString());
+            builder = null;
+            return object;
+        }
+
+        /**
+         * A super simple representation of a JSON object.
+         *
+         * <p>This class only exists to make methods of the {@link JsonObjectBuilder} type-safe and not
+         * allow a raw string inputs for methods like {@link JsonObjectBuilder#appendField(String,
+         * JsonObject)}.
+         */
+        public static class JsonObject {
+
+            private final String value;
+
+            private JsonObject(String value) {
+                this.value = value;
+            }
+
+            @Override
+            public String toString() {
+                return value;
+            }
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/enums/ClientVersion.java

@@ -1,100 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum ClientVersion {
-    LESS_THAN_V_1_7_10, v_1_7_10, v_1_8, v_1_9, v_1_9_1, v_1_9_2, v_1_9_3, v_1_10, v_1_11, v_1_11_1, v_1_12, v_1_12_1, v_1_12_2,
-    v_1_13, v_1_13_1, v_1_13_2, v_1_14, v_1_14_1, v_1_14_2, v_1_14_3, v_1_14_4, v_1_15, v_1_15_1, v_1_15_2, HIGHER_THAN_V_1_15_2, INVALID, ACCESS_FAILURE;
-
-    public static ClientVersion fromProtocolVersion(final int protocolVersion) {
-        int remainder = -1;
-        switch (protocolVersion) {
-            case -1:
-                return ACCESS_FAILURE;
-            case 1:
-            case 2:
-            case 3:
-            case 4:
-                return LESS_THAN_V_1_7_10;
-            case 47://ranging from 1.8->1.8.9
-                return v_1_8;
-            case 107:
-                return v_1_9;
-            case 108:
-                return v_1_9_1;
-            case 109:
-                return v_1_9_2;
-            case 110:
-                return v_1_9_3; //can be 1.9.3 or 1.9.4
-            case 210:
-                return v_1_10; //could be 1.10,1.10.1, 1.10.2
-            case 315:
-                return v_1_11;
-            case 316: //could be 11.1 or 11.2
-                return v_1_11_1;
-            case 335:
-                return v_1_12;
-            case 338:
-                return v_1_12_1;
-            case 340:
-                return v_1_12_2;
-            case 393:
-                return v_1_13;
-            case 401:
-                return v_1_13_1;
-            case 404:
-                return v_1_13_2;
-            case 477:
-                return v_1_14;
-            case 480:
-                return v_1_14_1;
-            case 485:
-                return v_1_14_2;
-            case 490:
-                return v_1_14_3;
-            case 498:
-                return v_1_14_4;
-            case 573:
-                return v_1_15;
-            case 575:
-                return v_1_15_1;
-            case 578:
-                return v_1_15_2;
-            default:
-                remainder = protocolVersion;
-        }
-        if (remainder > 578) {
-            return HIGHER_THAN_V_1_15_2;
-        }
-        return INVALID;
-    }
-
-    /**
-     * Returns if the client's version is more up to date than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isHigherThan(final ClientVersion version) {
-        if (this == version) return false;
-        return !isLowerThan(version);
-    }
-
-    /**
-     * Returns if the client's version is more outdated than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isLowerThan(final ClientVersion version) {
-        if (version == this) return false;
-        byte len = (byte) values().length;
-        for (byte i = 0; i < len; i++) {
-            final ClientVersion v = values()[i];
-            if (v == this) {
-                return true;
-            } else if (v == version) {
-                return false;
-            }
-        }
-        return false;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/Direction.java

@@ -1,15 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum Direction {
-    DOWN, UP, NORTH, SOUTH, WEST, EAST, NORTH_EAST,
-    NORTH_WEST, SOUTH_EAST,
-    SOUTH_WEST, WEST_NORTH_WEST,
-    NORTH_NORTH_WEST, NORTH_NORTH_EAST,
-    EAST_NORTH_EAST, EAST_SOUTH_EAST,
-    SOUTH_SOUTH_EAST, SOUTH_SOUTH_WEST,
-    WEST_SOUTH_WEST, SELF, NULL;
-
-    public static Direction get(final byte i) {
-        return values()[i];
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/EntityAnimationType.java

@@ -1,19 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum EntityAnimationType {
-    SWING_MAIN_ARM, DAMAGE, LEAVE_BED, SWING_OFFHAND, CRITICAL_EFFECT, MAGIC_CRITICAL_EFFECT;
-
-    public static final EntityAnimationType get(final int i) {
-        return values()[i];
-    }
-
-    public final int getIndex() {
-        for (int i = 0; i < values().length; i++) {
-            final EntityAnimationType curType = values()[0];
-            if (curType == this) {
-                return i;
-            }
-        }
-        return -1;
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/EntityUseAction.java

@@ -1,9 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum EntityUseAction {
-    INTERACT, INTERACT_AT, ATTACK, INVALID;
-
-    public static EntityUseAction get(final byte i) {
-        return values()[i];
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/Hand.java

@@ -1,6 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum Hand {
-    MAIN_HAND,
-    OFF_HAND
-}

src/main/java/io/github/retrooper/packetevents/enums/PlayerAction.java

@@ -1,25 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum PlayerAction {
-    START_SNEAKING,
-
-    STOP_SNEAKING,
-
-    STOP_SLEEPING,
-
-    START_SPRINTING,
-
-    STOP_SPRINTING,
-
-    START_RIDING_JUMP,
-
-    STOP_RIDING_JUMP,
-
-    OPEN_INVENTORY,
-
-    START_FALL_FLYING;
-
-    public static PlayerAction get(final byte i) {
-        return values()[i];
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/PlayerDigType.java

@@ -1,24 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-public enum PlayerDigType {
-
-    START_DESTROY_BLOCK,
-
-    ABORT_DESTROY_BLOCK,
-
-    STOP_DESTROY_BLOCK,
-
-    DROP_ALL_ITEMS,
-
-    DROP_ITEM,
-
-    RELEASE_USE_ITEM,
-
-    SWAP_HELD_ITEMS,
-
-    WRONG_PACKET;
-
-    public static PlayerDigType get(final byte i) {
-        return values()[i];
-    }
-}

src/main/java/io/github/retrooper/packetevents/enums/ServerVersion.java

@@ -1,70 +0,0 @@
-package io.github.retrooper.packetevents.enums;
-
-import org.apache.commons.lang.ArrayUtils;
-import org.bukkit.Bukkit;
-
-
-public enum ServerVersion {
-    v_1_7_10, v_1_8, v_1_8_3, v_1_8_8, v_1_9, v_1_9_4, v_1_10, v_1_11, v_1_12, v_1_13, v_1_13_2, v_1_14, v_1_15,
-    ERROR;
-
-
-    private static final String nmsVersionSuffix = Bukkit.getServer().getClass().getPackage().getName().replace(".", ",").split(",")[3];
-
-    public static ServerVersion getVersion() {
-        ServerVersion[] vals = values();
-        ArrayUtils.reverse(vals);
-        for (ServerVersion val : vals) {
-            String valName = val.name().substring(2).replace("_", ".");
-            if (Bukkit.getBukkitVersion().contains(valName)) {
-                return val;
-            }
-        }
-        return ERROR;
-    }
-
-    public static String getNmsSuffix() {
-        return nmsVersionSuffix;
-    }
-
-    public static String getNMSDirectory() {
-        return "net.minecraft.server." + nmsVersionSuffix;
-    }
-
-    public static String getOBCDirectory() {
-        return "org.bukkit.craftbukkit." + getNmsSuffix();
-    }
-
-    /**
-     * Returns if the current version is more up to date than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isHigherThan(final ServerVersion version) {
-        if (this == version) return false;
-        return !isLowerThan(version);
-    }
-
-    /**
-     * Returns if the current version is more outdated than the argument passed version
-     *
-     * @param version
-     * @return
-     */
-    public boolean isLowerThan(final ServerVersion version) {
-        if (version == this) return false;
-        byte len = (byte) values().length;
-        for (byte i = 0; i < len; i++) {
-            final ServerVersion v = values()[i];
-            if (v == this) {
-                return true;
-            } else if (v == version) {
-                return false;
-            }
-        }
-        return false;
-    }
-
-}
-

src/main/java/io/github/retrooper/packetevents/event/PacketEvent.java

@@ -1,23 +1,59 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
 package io.github.retrooper.packetevents.event;
 
 
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.enums.ServerVersion;
+import io.github.retrooper.packetevents.event.eventtypes.CallableEvent;
 
 /**
- * Incoming and sent packets are called asynchronously,
- * recommended to avoid non thread safe bukkit operations
+ * An event in both of PacketEvents' event systems.
+ *
+ * @author retrooper
+ * @since 1.2.6
  */
-public class PacketEvent {
-    protected static ServerVersion version = PacketEvents.getServerVersion();
-    protected long timestamp = PacketEvents.highlyPreciseMillis();
+public abstract class PacketEvent implements CallableEvent {
+    private long timestamp = System.currentTimeMillis();
 
     /**
-     * Timestamp of the packet
+     * Timestamp of when the PacketEvent was created.
+     * Basically timestamp of the packet.
      *
-     * @return
+     * @return Packet timestamp in milliseconds.
      */
     public long getTimestamp() {
         return timestamp;
     }
-}
+
+    /**
+     * Setter for the timestamp.
+     *
+     * @param timestamp Packet timestamp in milliseconds.
+     */
+    public void setTimestamp(final long timestamp) {
+        this.timestamp = timestamp;
+    }
+
+    public void callPacketEventExternal(final PacketListenerAbstract listener) {
+        listener.onPacketEventExternal(this);
+    }
+
+    public boolean isInbuilt() {
+        return false;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/PacketListener.java

@@ -1,4 +1,32 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
 package io.github.retrooper.packetevents.event;
 
+/**
+ * The legacy Packet listener.
+ * Implement this interface in your listener if you are using the legacy event system.
+ *
+ * @author retrooper
+ * @see PacketListenerAbstract
+ * @since 1.2.6
+ * @deprecated There is a new and better listener for the new event system.
+ */
+@Deprecated
 public interface PacketListener {
 }

src/main/java/io/github/retrooper/packetevents/event/PacketListenerAbstract.java

@@ -0,0 +1,201 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event;
+
+import io.github.retrooper.packetevents.event.impl.*;
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+import io.github.retrooper.packetevents.utils.immutableset.ImmutableSetCustom;
+
+/**
+ * Abstract packet listener.
+ *
+ * @author retrooper
+ * @since 1.8
+ */
+public abstract class PacketListenerAbstract {
+    private final PacketListenerPriority priority;
+    public ImmutableSetCustom<Byte> serverSidedStatusAllowance;
+    public ImmutableSetCustom<Byte> serverSidedLoginAllowance;
+    public ImmutableSetCustom<Byte> serverSidedPlayAllowance;
+
+    public ImmutableSetCustom<Byte> clientSidedStatusAllowance;
+    public ImmutableSetCustom<Byte> clientSidedHandshakeAllowance;
+    public ImmutableSetCustom<Byte> clientSidedLoginAllowance;
+    public ImmutableSetCustom<Byte> clientSidedPlayAllowance;
+
+    @Deprecated
+    public PacketListenerAbstract(final PacketEventPriority priority) {
+        this(PacketListenerPriority.getById(priority.getPriorityValue()));
+    }
+
+    public PacketListenerAbstract(PacketListenerPriority priority) {
+        this.priority = priority;
+        this.serverSidedStatusAllowance = null;
+        this.serverSidedLoginAllowance = null;
+        this.serverSidedPlayAllowance = null;
+
+        this.clientSidedStatusAllowance = null;
+        this.clientSidedHandshakeAllowance = null;
+        this.clientSidedLoginAllowance = null;
+        this.clientSidedPlayAllowance = null;
+    }
+
+
+    public PacketListenerAbstract() {
+        this(PacketListenerPriority.NORMAL);
+    }
+
+    public PacketListenerPriority getPriority() {
+        return priority;
+    }
+
+    public void onPacketStatusReceive(PacketStatusReceiveEvent event) {
+    }
+
+    public void onPacketStatusSend(PacketStatusSendEvent event) {
+    }
+
+    public void onPacketHandshakeReceive(PacketHandshakeReceiveEvent event) {
+    }
+
+    public void onPacketLoginReceive(PacketLoginReceiveEvent event) {
+    }
+
+    public void onPacketLoginSend(PacketLoginSendEvent event) {
+    }
+
+    public void onPacketPlayReceive(PacketPlayReceiveEvent event) {
+    }
+
+    public void onPacketPlaySend(PacketPlaySendEvent event) {
+    }
+
+    public void onPostPacketPlayReceive(PostPacketPlayReceiveEvent event) {
+    }
+
+    public void onPostPacketPlaySend(PostPacketPlaySendEvent event) {
+    }
+
+    public void onPostPlayerInject(PostPlayerInjectEvent event) {
+    }
+
+    public void onPlayerInject(PlayerInjectEvent event) {
+    }
+
+    public void onPlayerEject(PlayerEjectEvent event) {
+    }
+
+    public void onPacketEventExternal(PacketEvent event) {
+    }
+
+    public final void addServerSidedStatusFilter(Byte... statusPacketIDs) {
+        if (this.serverSidedStatusAllowance == null) {
+            this.serverSidedStatusAllowance = new ImmutableSetCustom<>(statusPacketIDs);
+        } else {
+            this.serverSidedStatusAllowance.addAll(statusPacketIDs);
+        }
+    }
+
+    public final void addServerSidedLoginFilter(Byte... loginPacketIDs) {
+        if (this.serverSidedLoginAllowance == null) {
+            this.serverSidedLoginAllowance = new ImmutableSetCustom<>(loginPacketIDs);
+        } else {
+            this.serverSidedLoginAllowance.addAll(loginPacketIDs);
+        }
+    }
+
+    public final void addServerSidedPlayFilter(Byte... playPacketIDs) {
+        if (this.serverSidedPlayAllowance == null) {
+            this.serverSidedPlayAllowance = new ImmutableSetCustom<>(playPacketIDs);
+        } else {
+            this.serverSidedPlayAllowance.addAll(playPacketIDs);
+        }
+    }
+
+    public final void addClientSidedStatusFilter(Byte... statusPacketIDs) {
+        if (this.clientSidedStatusAllowance == null) {
+            this.clientSidedStatusAllowance = new ImmutableSetCustom<>(statusPacketIDs);
+        } else {
+            this.clientSidedStatusAllowance.addAll(statusPacketIDs);
+        }
+    }
+
+    public final void addClientSidedHandshakeFilter(Byte... handshakePacketIDs) {
+        if (this.clientSidedHandshakeAllowance == null) {
+            this.clientSidedHandshakeAllowance = new ImmutableSetCustom<>(handshakePacketIDs);
+        } else {
+            this.clientSidedHandshakeAllowance.addAll(handshakePacketIDs);
+        }
+    }
+
+    public final void addClientSidedLoginFilter(Byte... loginPacketIDs) {
+        if (this.clientSidedLoginAllowance == null) {
+            this.clientSidedLoginAllowance = new ImmutableSetCustom<>(loginPacketIDs);
+        } else {
+            this.clientSidedLoginAllowance.addAll(loginPacketIDs);
+        }
+    }
+
+    public final void addClientSidedPlayFilter(Byte... playPacketIDs) {
+        if (this.clientSidedPlayAllowance == null) {
+            this.clientSidedPlayAllowance = new ImmutableSetCustom<>(playPacketIDs);
+        } else {
+            this.clientSidedPlayAllowance.addAll(playPacketIDs);
+        }
+    }
+
+    public final void filterAll() {
+        filterServerSidedStatus();
+        filterServerSidedLogin();
+        filterServerSidedPlay();
+
+        filterClientSidedStatus();
+        filterClientSidedHandshake();
+        filterClientSidedLogin();
+        filterClientSidedPlay();
+    }
+
+    public final void filterServerSidedStatus() {
+        this.serverSidedStatusAllowance = new ImmutableSetCustom<>();
+    }
+
+    public final void filterServerSidedLogin() {
+        this.serverSidedLoginAllowance = new ImmutableSetCustom<>();
+    }
+
+    public final void filterServerSidedPlay() {
+        this.serverSidedPlayAllowance = new ImmutableSetCustom<>();
+    }
+
+    public final void filterClientSidedStatus() {
+        this.clientSidedStatusAllowance = new ImmutableSetCustom<>();
+    }
+
+    public final void filterClientSidedHandshake() {
+        this.clientSidedHandshakeAllowance = new ImmutableSetCustom<>();
+    }
+
+    public final void filterClientSidedLogin() {
+        this.clientSidedLoginAllowance = new ImmutableSetCustom<>();
+    }
+
+    public final void filterClientSidedPlay() {
+        this.clientSidedPlayAllowance = new ImmutableSetCustom<>();
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/PacketListenerDynamic.java

@@ -0,0 +1,45 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event;
+
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+
+/**
+ * Deprecated abstract PacketListener.
+ * Please use {@link PacketListenerAbstract}, but this class will still work for a bit.
+ *
+ * @author retrooper
+ * @since 1.7.7
+ */
+@Deprecated
+public abstract class PacketListenerDynamic extends PacketListenerAbstract {
+    @Deprecated
+    public PacketListenerDynamic(final PacketEventPriority priority) {
+        super(priority);
+    }
+
+    public PacketListenerDynamic(PacketListenerPriority priority) {
+        super(priority);
+    }
+
+
+    public PacketListenerDynamic() {
+        super(PacketListenerPriority.NORMAL);
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/PacketListenerPriority.java

@@ -0,0 +1,74 @@
+/*
+ *
+ *  * This file is part of packetevents - https://github.com/retrooper/packetevents
+ *  * Copyright (C) 2016-2021 retrooper and contributors
+ *  *
+ *  * 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/>.
+ *
+ */
+
+package io.github.retrooper.packetevents.event;
+
+/**
+ * The priority of packet listeners affect the order they will be invoked in.
+ * The lowest priority listeners are invoked first, the most high ones are invoked last.
+ * The most high priority listener has the final decider on an event being cancelled.
+ * This priority can be specified in the PacketListenerAbstract constructor.
+ * If you don't specify a priority in the constructor, it will use the {@link #NORMAL} priority.
+ *
+ * @author retrooper
+ * @since 1.8
+ */
+public enum PacketListenerPriority {
+    /**
+     * Listener is of very low importance.
+     * This listener will be ran first.
+     */
+    LOWEST,
+
+    /**
+     * Listener is of low importance.
+     */
+    LOW,
+
+    /**
+     * Default listener priority.
+     * Listener is neither important nor unimportant and may run normally.
+     */
+    NORMAL,
+
+    /**
+     * Listener is of high importance.
+     */
+    HIGH,
+
+    /**
+     * Listener is of critical importance and wants to decide the cancellation of an event.
+     */
+    HIGHEST,
+
+    /**
+     * Listener is purely trying to decide the cancellation of an event.
+     * This listener should be ran last.
+     */
+    MONITOR;
+
+    public static PacketListenerPriority getById(byte id) {
+        return values()[id];
+    }
+
+    public byte getId() {
+        return (byte) ordinal();
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/annotation/PacketHandler.java

@@ -0,0 +1,39 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.annotation;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+
+/**
+ * This is what you override your event listener with on the old event system.
+ * You can specify the event priority of the listener method.
+ *
+ * @author retrooper
+ * @since 1.0
+ * @deprecated Was used for the old event system, the new one doesn't need this anymore.
+ */
+@Target({ElementType.METHOD})
+@Retention(RetentionPolicy.RUNTIME)
+@Deprecated
+public @interface PacketHandler {
+    byte priority() default 2; //NORMAL priority value
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/CallableEvent.java

@@ -0,0 +1,38 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.impl.PacketPlayReceiveEvent;
+
+/**
+ * The {@link PacketEvent} implements this interface.
+ * Every inbuilt event should implement the {@link #call(PacketListenerAbstract)} method.
+ * If you are making a custom event, don't implement this.
+ * The {@link PacketListenerAbstract#onPacketEventExternal(PacketEvent)} method is called for every event that is not in-built.
+ * including custom events.
+ *
+ * @author retrooper
+ * @see PacketPlayReceiveEvent
+ * @since 1.8
+ */
+public interface CallableEvent {
+    void call(PacketListenerAbstract listener);
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/CancellableEvent.java

@@ -0,0 +1,51 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import io.github.retrooper.packetevents.event.impl.PacketPlayReceiveEvent;
+
+/**
+ * Every event that supports cancellation should implement this interface.
+ * PacketEvents' event system lets the highest priority listener be have the highest priority
+ * in deciding whether the event will cancel.
+ * This means an event with a lower priority than the higher priority one would not be able to decide.
+ * Cancelling the event means the action assosiated with the event will be cancelled.
+ * For example, cancelling the {@link PacketPlayReceiveEvent}
+ * will prevent minecraft from processing the incoming packet.
+ *
+ * @author retrooper
+ * @see PacketPlayReceiveEvent
+ * @since 1.7
+ */
+public interface CancellableEvent {
+
+    /**
+     * This method returns if the event will be cancelled.
+     *
+     * @return Will the event be cancelled.
+     */
+    boolean isCancelled();
+
+    /**
+     * Cancel or proceed with the event.
+     *
+     * @param val Is the event cancelled
+     */
+    void setCancelled(boolean val);
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/CancellableNMSPacketEvent.java

@@ -0,0 +1,45 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+
+import java.net.InetSocketAddress;
+
+public abstract class CancellableNMSPacketEvent extends NMSPacketEvent implements CancellableEvent {
+    private boolean cancelled;
+
+    public CancellableNMSPacketEvent(Object channel, NMSPacket packet) {
+        super(channel, packet);
+    }
+
+    public CancellableNMSPacketEvent(InetSocketAddress address, NMSPacket packet) {
+        super(address, packet);
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/NMSPacketEvent.java

@@ -0,0 +1,109 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.packettype.PacketType;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import io.github.retrooper.packetevents.utils.netty.channel.ChannelUtils;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code NMSPacketEvent} abstract class represents an event that has to do with an actual packet.
+ * Don't mix this up with {@link io.github.retrooper.packetevents.event.PacketEvent}.
+ * The PacketEvent class represents an event that belongs to PacketEvent's packet system.
+ *
+ * @author retrooper
+ * @since 1.8
+ */
+public abstract class NMSPacketEvent extends PacketEvent implements CallableEvent {
+    private final InetSocketAddress socketAddress;
+    private final byte packetID;
+    protected NMSPacket packet;
+    protected boolean cancelled;
+
+    public NMSPacketEvent(Object channel, NMSPacket packet) {
+        this(ChannelUtils.getSocketAddress(channel), packet);//Call the constructor below
+    }
+
+    public NMSPacketEvent(InetSocketAddress address, NMSPacket packet) {
+        this.socketAddress = address;
+        this.packet = packet;
+        packetID = PacketType.packetIDMap.getOrDefault(packet.getRawNMSPacket().getClass(), PacketType.INVALID);
+    }
+
+    /**
+     * Get the associated player's socket address.
+     *
+     * @return Socket address of the associated player.
+     */
+    public final InetSocketAddress getSocketAddress() {
+        return socketAddress;
+    }
+
+    /**
+     * This method returns the NMS name of the packet.
+     * To get the name of the packet we get the class of the packet and then the simple name of the class.
+     * See also: {@link Class#getSimpleName()}
+     * We cache the name after the first call to improve performance.
+     * It is not recommended to call this method unless you NEED it.
+     * If you are comparing packet types, use the {@link PacketType} byte system.
+     * You would only need the packet name if packet type system doesn't contain your desired packet yet.
+     *
+     * @return Name of the packet.
+     */
+    @Deprecated
+    public final String getPacketName() {
+        return ClassUtil.getClassSimpleName(packet.getRawNMSPacket().getClass());
+    }
+
+    /**
+     * Get the NMS packet.
+     *
+     * @return Get NMS packet.
+     */
+    public final NMSPacket getNMSPacket() {
+        return packet;
+    }
+
+    /**
+     * Update the NMS Packet.
+     *
+     * @param packet NMS Object
+     */
+    public final void setNMSPacket(NMSPacket packet) {
+        this.packet = packet;
+    }
+
+    /**
+     * Get the Packet ID.
+     *
+     * @return Packet ID.
+     */
+    public byte getPacketId() {
+        return packetID;
+    }
+
+    @Override
+    public boolean isInbuilt() {
+        return true;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/PlayerEvent.java

@@ -0,0 +1,38 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import io.github.retrooper.packetevents.event.impl.PacketPlayReceiveEvent;
+import org.bukkit.entity.Player;
+
+/**
+ * Every event that has an associated player is recommended to implement this interface.
+ *
+ * @author retrooper
+ * @see PacketPlayReceiveEvent
+ * @since 1.6.9
+ */
+public interface PlayerEvent {
+    /**
+     * Associated player.
+     *
+     * @return Player.
+     */
+    Player getPlayer();
+}

src/main/java/io/github/retrooper/packetevents/event/eventtypes/PostTaskEvent.java

@@ -0,0 +1,39 @@
+/*
+ *
+ *  * This file is part of packetevents - https://github.com/retrooper/packetevents
+ *  * Copyright (C) 2016-2021 retrooper and contributors
+ *  *
+ *  * 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/>.
+ *
+ */
+
+package io.github.retrooper.packetevents.event.eventtypes;
+
+import io.github.retrooper.packetevents.event.impl.PacketPlayReceiveEvent;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Every event that allows you to schedule a task that will run after the action associated with the event.
+ *
+ * @author retrooper
+ * @since 1.8
+ */
+public interface PostTaskEvent {
+    boolean isPostTaskAvailable();
+
+    @Nullable Runnable getPostTask();
+
+    void setPostTask(@NotNull Runnable postTask);
+}

src/main/java/io/github/retrooper/packetevents/event/impl/BukkitMoveEvent.java

@@ -1,35 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.event.PacketEvent;
-import org.bukkit.Location;
-import org.bukkit.entity.Player;
-import org.bukkit.event.player.PlayerMoveEvent;
-
-public final class BukkitMoveEvent extends PacketEvent {
-    private final Player player;
-    private final Location to, from;
-
-    public BukkitMoveEvent(final Player player, final Location to, final Location from) {
-        this.player = player;
-        this.to = to;
-        this.from = from;
-    }
-
-    public BukkitMoveEvent(final PlayerMoveEvent e) {
-        this.player = e.getPlayer();
-        this.to = e.getTo();
-        this.from = e.getFrom();
-    }
-
-    public Player getPlayer() {
-        return player;
-    }
-
-    public Location getFrom() {
-        return from;
-    }
-
-    public Location getTo() {
-        return to;
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketHandshakeReceiveEvent.java

@@ -0,0 +1,52 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code PacketHandshakeReceiveEvent} event is fired whenever the a HANDSHAKE packet is received from a client.
+ * The {@code PacketHandshakeReceiveEvent} has no Bukkit player, the player object is null in this state.
+ * Use the {@link #getSocketAddress()} to identify who sends the packet.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Handshaking">https://wiki.vg/Protocol#Handshaking</a>
+ * @since 1.8
+ */
+public class PacketHandshakeReceiveEvent extends CancellableNMSPacketEvent {
+    public PacketHandshakeReceiveEvent(final Object channel, final NMSPacket packet) {
+        super(channel, packet);
+    }
+
+    public PacketHandshakeReceiveEvent(final InetSocketAddress socketAddress, final NMSPacket packet) {
+        super(socketAddress, packet);
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.clientSidedLoginAllowance == null || listener.clientSidedLoginAllowance.contains(getPacketId())) {
+            listener.onPacketHandshakeReceive(this);
+        }
+    }
+}
+

src/main/java/io/github/retrooper/packetevents/event/impl/PacketLoginReceiveEvent.java

@@ -0,0 +1,51 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code PacketLoginReceiveEvent} event is fired whenever the a LOGIN packet is received from a client.
+ * The {@code PacketLoginReceiveEvent} has no Bukkit player, the player object is null in this state.
+ * Use the {@link #getSocketAddress()} to identify who sends the packet.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Login">https://wiki.vg/Protocol#Login</a>
+ * @since 1.8
+ */
+public class PacketLoginReceiveEvent extends CancellableNMSPacketEvent {
+    public PacketLoginReceiveEvent(final Object channel, final NMSPacket packet) {
+        super(channel, packet);
+    }
+
+    public PacketLoginReceiveEvent(final InetSocketAddress socketAddress, final NMSPacket packet) {
+        super(socketAddress, packet);
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.clientSidedLoginAllowance == null || listener.clientSidedLoginAllowance.contains(getPacketId())) {
+            listener.onPacketLoginReceive(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketLoginSendEvent.java

@@ -0,0 +1,69 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PostTaskEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import org.jetbrains.annotations.NotNull;
+
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code PacketLoginSendEvent} event is fired whenever the a LOGIN packet is being planned to be sent to the client.
+ * The {@code PacketLoginSendEvent} has no Bukkit player, the player object is null in this state.
+ * Use the {@link #getSocketAddress()} to identify who sends the packet.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Login">https://wiki.vg/Protocol#Login</a>
+ * @since 1.8
+ */
+public class PacketLoginSendEvent extends CancellableNMSPacketEvent implements PostTaskEvent {
+    private Runnable postTask;
+    public PacketLoginSendEvent(Object channel, NMSPacket packet) {
+        super(channel, packet);
+    }
+
+    public PacketLoginSendEvent(InetSocketAddress address, NMSPacket packet) {
+        super(address, packet);
+    }
+
+    @Override
+    public boolean isPostTaskAvailable() {
+        return postTask != null;
+    }
+
+    @Override
+    public Runnable getPostTask() {
+        return postTask;
+    }
+
+    @Override
+    public void setPostTask(@NotNull Runnable postTask) {
+        this.postTask = postTask;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.serverSidedLoginAllowance == null || listener.serverSidedLoginAllowance.contains(getPacketId())) {
+            listener.onPacketLoginSend(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketPlayReceiveEvent.java

@@ -0,0 +1,64 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * The {@code PacketPlayReceiveEvent} event is fired whenever the a PLAY packet is
+ * received from any connected client.
+ * Cancelling this event will result in preventing minecraft from processing the incoming packet.
+ * It would be as if the player never sent the packet from the server's view.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Play">https://wiki.vg/Protocol#Play</a>
+ * @since 1.2.6
+ */
+public final class PacketPlayReceiveEvent extends CancellableNMSPacketEvent implements PlayerEvent {
+    private final Player player;
+
+    public PacketPlayReceiveEvent(Player player, Object channel, NMSPacket packet) {
+        super(channel, packet);
+        this.player = player;
+    }
+
+    /**
+     * This method returns the bukkit player object of the packet sender.
+     * The player object might be null during early packets.
+     *
+     * @return Packet sender.
+     */
+    @NotNull
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.clientSidedPlayAllowance == null || listener.clientSidedPlayAllowance.contains(getPacketId())) {
+            listener.onPacketPlayReceive(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketPlaySendEvent.java

@@ -0,0 +1,82 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PostTaskEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * The {@code PacketPlaySendEvent} event is fired whenever the a PLAY packet is about to be sent to a client.
+ * Cancelling this event will result in preventing minecraft from sending the packet.
+ * The player won't receive the packet if you cancel it.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Play">https://wiki.vg/Protocol#Play</a>
+ * @since 1.2.6
+ */
+public final class PacketPlaySendEvent extends CancellableNMSPacketEvent implements PlayerEvent, PostTaskEvent {
+    private final Player player;
+    private Runnable postTask;
+
+    public PacketPlaySendEvent(final Player player, final Object channel, final NMSPacket packet) {
+        super(channel, packet);
+        this.player = player;
+    }
+
+    /**
+     * This method returns the bukkit player object of the packet receiver.
+     * The player object might be null during early packets.
+     *
+     * @return Packet receiver.
+     */
+    @NotNull
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    @Override
+    public boolean isPostTaskAvailable() {
+        return postTask != null;
+    }
+
+    @Override
+    public Runnable getPostTask() {
+        return postTask;
+    }
+
+    @Override
+    public void setPostTask(@NotNull Runnable postTask) {
+        this.postTask = postTask;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.serverSidedPlayAllowance == null || listener.serverSidedPlayAllowance.contains(getPacketId())) {
+            listener.onPacketPlaySend(this);
+        }
+    }
+}
+

src/main/java/io/github/retrooper/packetevents/event/impl/PacketReceiveEvent.java

@@ -1,67 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.event.PacketEvent;
-import org.bukkit.entity.Player;
-
-public final class PacketReceiveEvent extends PacketEvent {
-    private final Player player;
-    private final String name;
-    private final Object packet;
-    private boolean cancelled;
-
-    public PacketReceiveEvent(final Player player, final String packetName, final Object packet) {
-        this.player = player;
-        this.name = packetName;
-        this.packet = packet;
-    }
-
-    /**
-     * Get the player sending the packet
-     *
-     * @return
-     */
-    public Player getPlayer() {
-        return this.player;
-    }
-
-    /**
-     * Get the packet's name (NMS packet class simple name)
-     *
-     * @return
-     */
-    public String getPacketName() {
-        return this.name;
-    }
-
-    /**
-     * This is deprecated, please us {@link #getNMSPacket()}
-     *
-     * @return packet
-     */
-    @Deprecated
-    public Object getPacket() {
-        return this.packet;
-    }
-
-    public Object getNMSPacket() {
-        return this.packet;
-    }
-
-    /**
-     * Returns if the packet has been cancelled
-     *
-     * @return cancelled
-     */
-    public boolean isCancelled() {
-        return cancelled;
-    }
-
-    /**
-     * Cancel the packet
-     *
-     * @param cancelled
-     */
-    public void setCancelled(boolean cancelled) {
-        this.cancelled = cancelled;
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketSendEvent.java

@@ -1,56 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.event.PacketEvent;
-import org.bukkit.entity.Player;
-
-
-public final class PacketSendEvent extends PacketEvent {
-    private final Player player;
-    private final String name;
-    private final Object packet;
-    private boolean cancelled;
-
-    public PacketSendEvent(final Player player, final String packetName, final Object packet) {
-        this.player = player;
-        this.name = packetName;
-        this.packet = packet;
-        this.cancelled = false;
-    }
-
-
-    public Player getPlayer() {
-        return this.player;
-    }
-
-    public String getPacketName() {
-        return this.name;
-    }
-
-    /**
-     * This is deprecated, please us {@link #getNMSPacket()}
-     *
-     * @return packet
-     */
-    @Deprecated
-    public Object getPacket() {
-        return this.packet;
-    }
-
-    /**
-     * Get the raw packet object
-     *
-     * @return packet
-     */
-    public Object getNMSPacket() {
-        return this.packet;
-    }
-
-    public boolean isCancelled() {
-        return cancelled;
-    }
-
-    public void setCancelled(boolean cancelled) {
-        this.cancelled = cancelled;
-    }
-}
-

src/main/java/io/github/retrooper/packetevents/event/impl/PacketStatusReceiveEvent.java

@@ -0,0 +1,51 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code PacketStatusReceiveEvent} event is fired whenever the server receives a STATUS packet from a client.
+ * The {@code PacketStatusSendEvent} has no Bukkit player, the player object is null in this state.
+ * Use the {@link #getSocketAddress()} to identify who sends the packet.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Status">https://wiki.vg/Protocol#Status</a>
+ * @since 1.8
+ */
+public class PacketStatusReceiveEvent extends CancellableNMSPacketEvent {
+    public PacketStatusReceiveEvent(final Object channel, final NMSPacket packet) {
+        super(channel, packet);
+    }
+
+    public PacketStatusReceiveEvent(final InetSocketAddress socketAddress, final NMSPacket packet) {
+        super(socketAddress, packet);
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.clientSidedStatusAllowance == null || listener.clientSidedStatusAllowance.contains(getPacketId())) {
+            listener.onPacketStatusReceive(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PacketStatusSendEvent.java

@@ -0,0 +1,72 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableNMSPacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PostTaskEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code PacketStatusSendEvent} event is fired whenever the server wants to send a STATUS packet to a client.
+ * This class implements {@link CancellableEvent}.
+ * The {@code PacketStatusSendEvent} has no Bukkit player, the player object is null in this state.
+ * Use the {@link #getSocketAddress()} to identify who sends the packet.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Status">https://wiki.vg/Protocol#Status</a>
+ * @since 1.8
+ */
+public class PacketStatusSendEvent extends CancellableNMSPacketEvent implements PostTaskEvent {
+    private Runnable postTask;
+    public PacketStatusSendEvent(Object channel, NMSPacket packet) {
+        super(channel, packet);
+    }
+
+    public PacketStatusSendEvent(InetSocketAddress address, NMSPacket packet) {
+        super(address, packet);
+    }
+
+    @Override
+    public boolean isPostTaskAvailable() {
+        return postTask != null;
+    }
+
+    @Override
+    public Runnable getPostTask() {
+        return postTask;
+    }
+
+    @Override
+    public void setPostTask(@NotNull Runnable postTask) {
+        this.postTask = postTask;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.serverSidedStatusAllowance == null || listener.serverSidedStatusAllowance.contains(getPacketId())) {
+            listener.onPacketStatusSend(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PlayerEjectEvent.java

@@ -0,0 +1,84 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * The {@code PlayerEjectEvent} event is fired whenever a player is ejected.
+ * This class implements {@link CancellableEvent} and {@link PlayerEvent}.
+ *
+ * @author retrooper
+ * @see <a href="https://github.com/retrooper/packetevents/blob/dev/src/main/java/io/github/retrooper/packetevents/handler/PacketHandlerInternal.java">https://github.com/retrooper/packetevents/blob/dev/src/main/java/io/github/retrooper/packetevents/handler/PacketHandlerInternal.java</a>
+ * @since 1.6.9
+ */
+public final class PlayerEjectEvent extends PacketEvent implements CancellableEvent, PlayerEvent {
+    private final Player player;
+    private boolean cancelled;
+
+    public PlayerEjectEvent(final Player player) {
+        this.player = player;
+    }
+
+    @Override
+    public boolean isCancelled() {
+        return cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
+    }
+
+    /**
+     * This method returns the bukkit player object of the player being ejected.
+     * The player object is guaranteed to NOT be null.
+     *
+     * @return Ejected player.
+     */
+    @NotNull
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    /**
+     * @return Is the event called async?
+     * @deprecated Now always false
+     */
+    @Deprecated
+    public boolean isAsync() {
+        return false;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        listener.onPlayerEject(this);
+    }
+
+    @Override
+    public boolean isInbuilt() {
+        return true;
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PlayerInjectEvent.java

@@ -1,37 +1,100 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
 package io.github.retrooper.packetevents.event.impl;
 
-import io.github.retrooper.packetevents.enums.ClientVersion;
+import io.github.retrooper.packetevents.PacketEvents;
 import io.github.retrooper.packetevents.event.PacketEvent;
-import io.github.retrooper.packetevents.utils.VersionLookupUtils;
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.utils.netty.channel.ChannelUtils;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.Nullable;
 
-public final class PlayerInjectEvent extends PacketEvent {
+import java.net.InetSocketAddress;
+
+/**
+ * The {@code PlayerInjectEvent} event is fired whenever a player is injected.
+ * A player is injected by PacketEvents whenever they join the server.
+ * This class implements {@link CancellableEvent} and {@link PlayerEvent}.
+ *
+ * @author retrooper
+ * @see <a href="https://github.com/retrooper/packetevents/blob/dev/src/main/java/io/github/retrooper/packetevents/handler/PacketHandlerInternal.java">https://github.com/retrooper/packetevents/blob/dev/src/main/java/io/github/retrooper/packetevents/handler/PacketHandlerInternal.java</a>
+ * @since 1.6.9
+ */
+public final class PlayerInjectEvent extends PacketEvent implements CancellableEvent, PlayerEvent {
     private final Player player;
+    private final InetSocketAddress address;
     private boolean cancelled;
-    private final ClientVersion clientVersion;
 
     public PlayerInjectEvent(final Player player) {
         this.player = player;
-        this.clientVersion = ClientVersion.fromProtocolVersion(VersionLookupUtils.getProtocolVersion(player));
+        this.address = ChannelUtils.getSocketAddress(PacketEvents.get().getPlayerUtils().getChannel(player));
     }
 
+    @Override
     public boolean isCancelled() {
         return cancelled;
     }
 
-    public void setCancelled(boolean cancelled) {
-        this.cancelled = cancelled;
-    }
-
-    public void cancel() {
-        setCancelled(true);
-    }
-
-    public ClientVersion getClientVersion() {
-        return clientVersion;
+    @Override
+    public void setCancelled(boolean value) {
+        cancelled = value;
     }
 
+    /**
+     * This method returns the bukkit player object of the player being injected.
+     * This player might not be fully initialized.
+     *
+     * @return Injected Player.
+     */
+    @Nullable
+    @Override
     public Player getPlayer() {
         return player;
     }
+
+    /**
+     * This method returns the socket address injecting player.
+     *
+     * @return Socket address of the injecting player.
+     */
+    @Nullable
+    public InetSocketAddress getSocketAddress() {
+        return address;
+    }
+
+    /**
+     * @deprecated Will always be false
+     */
+    @Deprecated
+    public boolean isAsync() {
+        return false;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        listener.onPlayerInject(this);
+    }
+
+    @Override
+    public boolean isInbuilt() {
+        return true;
+    }
 }

src/main/java/io/github/retrooper/packetevents/event/impl/PlayerUninjectEvent.java

@@ -1,29 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.event.PacketEvent;
-import org.bukkit.entity.Player;
-
-public final class PlayerUninjectEvent extends PacketEvent {
-    private final Player player;
-    private boolean cancelled;
-
-    public PlayerUninjectEvent(final Player player) {
-        this.player = player;
-    }
-
-    public void setCancelled(final boolean val) {
-        this.cancelled = val;
-    }
-
-    public void cancel() {
-        setCancelled(true);
-    }
-
-    public boolean isCancelled() {
-        return this.cancelled;
-    }
-
-    public Player getPlayer() {
-        return player;
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/impl/PostPacketPlayReceiveEvent.java

@@ -0,0 +1,60 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.NMSPacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import org.bukkit.entity.Player;
+
+/**
+ * The {@code PostPacketPlayReceiveEvent} event is fired after all PacketEvents listeners finished processing
+ * the {@code PacketPlayReceiveEvent}. This event won't be called if the PacketPlayReceiveEvent event was cancelled.
+ * You cannot cancel this event.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Serverbound_4">https://wiki.vg/Protocol#Serverbound_4</a>
+ * @since 1.7
+ */
+public class PostPacketPlayReceiveEvent extends NMSPacketEvent implements PlayerEvent {
+    private final Player player;
+
+    public PostPacketPlayReceiveEvent(final Player player, final Object channel, final NMSPacket packet) {
+        super(channel, packet);
+        this.player = player;
+    }
+
+    /**
+     * This method returns the bukkit player object of the packet sender.
+     *
+     * @return Packet sender.
+     */
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.clientSidedPlayAllowance == null || listener.clientSidedPlayAllowance.contains(getPacketId())) {
+            listener.onPostPacketPlayReceive(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PostPacketPlaySendEvent.java

@@ -0,0 +1,60 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.impl;
+
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.NMSPacketEvent;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import org.bukkit.entity.Player;
+
+/**
+ * The {@code PostPacketPlaySendEvent} event is fired after all PacketEvents listeners finished processing
+ * the {@code PacketPlaySendEvent}. This event won't be called if the PacketPlaySendEvent event was cancelled.
+ * You cannot cancel this event.
+ *
+ * @author retrooper
+ * @see <a href="https://wiki.vg/Protocol#Clientbound_4">https://wiki.vg/Protocol#Clientbound_4</a>
+ * @since 1.7
+ */
+public class PostPacketPlaySendEvent extends NMSPacketEvent implements PlayerEvent {
+    private final Player player;
+
+    public PostPacketPlaySendEvent(final Player player, final Object channel, final NMSPacket packet) {
+        super(channel, packet);
+        this.player = player;
+    }
+
+    /**
+     * This method returns the bukkit player object of the packet sender.
+     *
+     * @return Packet receiver.
+     */
+    @Override
+    public Player getPlayer() {
+        return player;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        if (listener.serverSidedPlayAllowance == null || listener.serverSidedPlayAllowance.contains(getPacketId())) {
+            listener.onPostPacketPlaySend(this);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/impl/PostPlayerInjectEvent.java

@@ -1,20 +1,106 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
 package io.github.retrooper.packetevents.event.impl;
 
+import io.github.retrooper.packetevents.PacketEvents;
 import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.PlayerEvent;
+import io.github.retrooper.packetevents.utils.netty.channel.ChannelUtils;
+import io.github.retrooper.packetevents.utils.player.ClientVersion;
 import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.net.InetSocketAddress;
 
 /**
- * Please use {@link PlayerInjectEvent}
+ * The {@code PostPlayerInjectEvent} event is fired after a successful injection.
+ * Use the {@link #isAsync()} method to figure out if is being called sync or async.
+ * A player is injected by PacketEvents each time they join the server.
+ *
+ * @author retrooper
+ * @see <a href="https://github.com/retrooper/packetevents/blob/dev/src/main/java/io/github/retrooper/packetevents/handler/PacketHandlerInternal.java">https://github.com/retrooper/packetevents/blob/dev/src/main/java/io/github/retrooper/packetevents/handler/PacketHandlerInternal.java</a>
+ * @since 1.3
  */
-@Deprecated
-public final class PostPlayerInjectEvent extends PacketEvent {
+public class PostPlayerInjectEvent extends PacketEvent implements PlayerEvent {
     private final Player player;
+    private final boolean async;
 
-    public PostPlayerInjectEvent(final Player player) {
+    public PostPlayerInjectEvent(Player player, boolean async) {
         this.player = player;
+        this.async = async;
     }
 
+    /**
+     * This method returns the bukkit player object of the player that has been injected.
+     * The player is guaranteed to not be null.
+     *
+     * @return Injected Player.
+     */
+    @NotNull
+    @Override
     public Player getPlayer() {
         return player;
     }
+
+    /**
+     * This method returns the cached netty channel of the player.
+     *
+     * @return Netty channel of the injected player.
+     */
+    @NotNull
+    public Object getChannel() {
+        return PacketEvents.get().getPlayerUtils().getChannel(player);
+    }
+
+    @NotNull
+    public InetSocketAddress getSocketAddress() {
+        return ChannelUtils.getSocketAddress(getChannel());
+    }
+
+    /**
+     * This method returns the ClientVersion of the injected player.
+     *
+     * @return ClientVersion of injected player.
+     * @see ClientVersion
+     */
+    @NotNull
+    public ClientVersion getClientVersion() {
+        return PacketEvents.get().getPlayerUtils().getClientVersion(player);
+    }
+
+    /**
+     * Has the event been called async or sync?
+     *
+     * @return Was the event call in an async context?
+     */
+    public boolean isAsync() {
+        return async;
+    }
+
+    @Override
+    public void call(PacketListenerAbstract listener) {
+        listener.onPostPlayerInject(this);
+    }
+
+    @Override
+    public boolean isInbuilt() {
+        return true;
+    }
 }

src/main/java/io/github/retrooper/packetevents/event/impl/ServerTickEvent.java

@@ -1,33 +0,0 @@
-package io.github.retrooper.packetevents.event.impl;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.event.PacketEvent;
-
-public final class ServerTickEvent extends PacketEvent {
-    private final int tick;
-    private final double tps;
-
-    public ServerTickEvent(final int tick, final long timestamp) {
-        this.tick = tick;
-        this.timestamp = timestamp;
-        this.tps = PacketEvents.getCurrentServerTPS();
-    }
-
-    public ServerTickEvent(final int tick) {
-        this.tick = tick;
-        this.tps = PacketEvents.getCurrentServerTPS();
-    }
-
-
-    public long getTimestamp() {
-        return timestamp;
-    }
-
-    public int getCurrentTick() {
-        return tick;
-    }
-
-    public double getCurrentServerTPS() {
-        return tps;
-    }
-}

src/main/java/io/github/retrooper/packetevents/event/manager/EventManager.java

@@ -1,65 +1,170 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
 package io.github.retrooper.packetevents.event.manager;
 
-import io.github.retrooper.packetevents.annotations.PacketHandler;
+import io.github.retrooper.packetevents.PacketEvents;
 import io.github.retrooper.packetevents.event.PacketEvent;
 import io.github.retrooper.packetevents.event.PacketListener;
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.PacketListenerDynamic;
 
-import java.lang.reflect.InvocationTargetException;
-import java.lang.reflect.Method;
-import java.util.ArrayList;
-import java.util.HashMap;
-import java.util.List;
-import java.util.concurrent.ExecutorService;
-import java.util.concurrent.Executors;
+/**
+ * This is the event manager interface.
+ * Every method is already implemented, we just use this
+ * to have less code duplications.
+ * You can either call event manager methods in the
+ * {@link io.github.retrooper.packetevents.PacketEvents} instance or with an instance of the
+ * {@link PEEventManager} stored in {@link PacketEvents}.
+ *
+ * @author retrooper
+ * @see PacketEvents#getEventManager()
+ * @since 1.0
+ */
+public interface EventManager {
 
-public final class EventManager {
-
-    private static final ExecutorService executorService = Executors.newCachedThreadPool();
-    private final HashMap<PacketListener, List<Method>> registeredMethods = new HashMap<PacketListener, List<Method>>();
-
-    public void callEvent(final PacketEvent e) {
-        for (final PacketListener listener : registeredMethods.keySet()) {
-            //Annotated methods
-            final List<Method> methods = registeredMethods.get(listener);
-            for (final Method method : methods) {
-                final Class<?> parameterType = method.getParameterTypes()[0];
-                if (parameterType.equals(PacketEvent.class)
-                        || parameterType.isInstance(e)) {
-                    try {
-                        method.invoke(listener, e);
-                    } catch (IllegalAccessException | InvocationTargetException ex) {
-                        ex.printStackTrace();
-                    }
-                }
-            }
-        }
+    /**
+     * Call a packet event.
+     * This will let all listeners(new and deprecated listeners) process the event.
+     * It isn't recommended to use a mix of both listeners(new and deprecated),
+     * but it will work and they are compatible.
+     *
+     * @param event {@link PacketEvent}
+     * @return Same event manager instance.
+     */
+    default EventManager callEvent(PacketEvent event) {
+        //The dynamic event manager calls the legacy event manager.
+        PEEventManager.EVENT_MANAGER_MODERN.callEvent(event);
+        return this;
     }
 
-    public void registerListener(final PacketListener e) {
-        if (registeredMethods.containsKey(e)) {
-            return;
-        }
-        final List<Method> methods = new ArrayList<Method>();
-        for (final Method m : e.getClass().getMethods()) {
-            if (m.isAnnotationPresent(PacketHandler.class)
-                    && m.getParameterTypes().length == 1) {
-                methods.add(m);
-            }
-        }
-        if (!methods.isEmpty()) {
-            registeredMethods.put(e, methods);
+    /**
+     * Register a deprecated event listener.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listener {@link PacketListener}
+     * @return Same event manager instance.
+     */
+    @Deprecated
+    default EventManager registerListener(PacketListener listener) {
+        if (listener != null) {
+            PEEventManager.EVENT_MANAGER_LEGACY.registerListener(listener);
         }
+        return this;
     }
 
-    public void unregisterListener(final PacketListener e) {
-        registeredMethods.remove(e);
+    /**
+     * Register multiple deprecated event listeners with one method.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listeners {@link PacketListener}
+     * @return Same event manager instance.
+     */
+    @Deprecated
+    default EventManager registerListeners(PacketListener... listeners) {
+        PEEventManager.EVENT_MANAGER_LEGACY.registerListeners(listeners);
+        return this;
     }
 
-    public void unregisterAllListeners() {
-        registeredMethods.clear();
+    /**
+     * Unregister a deprecated event listener.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listener {@link PacketListener}
+     * @return Same event manager instance.
+     */
+    @Deprecated
+    default EventManager unregisterListener(PacketListener listener) {
+        PEEventManager.EVENT_MANAGER_LEGACY.unregisterListener(listener);
+        return this;
     }
 
-    public boolean isRegistered(final PacketListener listener) {
-        return registeredMethods.containsKey(listener);
+    /**
+     * Unregister multiple deprecated event listeners with one method.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listeners {@link PacketListener}
+     * @return Same event manager instance.
+     */
+    @Deprecated
+    default EventManager unregisterListeners(PacketListener... listeners) {
+        PEEventManager.EVENT_MANAGER_LEGACY.unregisterListeners(listeners);
+        return this;
+    }
+
+    /**
+     * Register a PacketListenerDynamic listener.
+     *
+     * @param listener {@link PacketListenerDynamic}
+     * @return Same event manager instance.
+     */
+    @Deprecated
+    default EventManager registerListener(PacketListenerDynamic listener) {
+        PEEventManager.EVENT_MANAGER_MODERN.registerListener(listener);
+        return this;
+    }
+
+    /**
+     * Register multiple PacketListenerDynamic listeners.
+     *
+     * @param listeners {@link PacketListenerDynamic}
+     * @return Same event manager instance.
+     */
+    @Deprecated
+    default EventManager registerListeners(PacketListenerDynamic... listeners) {
+        PEEventManager.EVENT_MANAGER_MODERN.registerListeners(listeners);
+        return this;
+    }
+
+
+    /**
+     * Register a PacketListenerAbstract listener.
+     *
+     * @param listener {@link PacketListenerAbstract}
+     * @return Same event manager instance.
+     */
+    default EventManager registerListener(PacketListenerAbstract listener) {
+        if (listener != null) {
+            PEEventManager.EVENT_MANAGER_MODERN.registerListener(listener);
+        }
+        return this;
+    }
+
+    /**
+     * Register multiple PacketListenerAbstract listeners.
+     *
+     * @param listeners {@link PacketListenerAbstract}
+     * @return Same event manager instance.
+     */
+    default EventManager registerListeners(PacketListenerAbstract... listeners) {
+        PEEventManager.EVENT_MANAGER_MODERN.registerListeners(listeners);
+        return this;
+    }
+
+    /**
+     * Unregister all registered event listeners.
+     * All the deprecated and the dynamic listeners will be unregistered.
+     *
+     * @return Same event manager instance.
+     */
+    default EventManager unregisterAllListeners() {
+        PEEventManager.EVENT_MANAGER_MODERN.unregisterAllListeners();
+        PEEventManager.EVENT_MANAGER_LEGACY.unregisterAllListeners();
+        return this;
     }
 }

src/main/java/io/github/retrooper/packetevents/event/manager/EventManagerLegacy.java

@@ -0,0 +1,160 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.manager;
+
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListener;
+import io.github.retrooper.packetevents.event.annotation.PacketHandler;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.HashMap;
+import java.util.HashSet;
+import java.util.Map;
+
+@Deprecated
+class EventManagerLegacy {
+    /**
+     * Map storing all all legacy packet event listeners.
+     * The key is an individual listener, the values are the key's event methods.
+     */
+
+    private final Map<PacketListener, HashSet<Method>> staticRegisteredMethods = new HashMap<>();
+
+    /**
+     * Call a PacketEvent with the legacy event manager.
+     * This method processes the event on all legacy packet event listeners.
+     * This method is actually called by {@link EventManagerModern#callEvent(PacketEvent)} as the
+     * if you mix the two event systems, the dynamic listeners are always processed first and pass
+     * their highest reached event priority that this legacy one has to beat/reach to be able to cancel
+     * the event.
+     * This downside of this system is the event listeners aren't executed in any particular order, just
+     * in the order they were registered.
+     * This system is also slower than the other event system.
+     *
+     * @param event         {@link PacketEvent}
+     * @param eventPriority Priority the legacy listeners should beat to decide cancellation of the event.
+     */
+    @Deprecated
+    public void callEvent(final PacketEvent event, byte eventPriority) {
+        boolean isCancelled = false;
+        if (event instanceof CancellableEvent) {
+            isCancelled = ((CancellableEvent) event).isCancelled();
+        }
+        //STATIC LISTENERS
+        for (final PacketListener listener : staticRegisteredMethods.keySet()) {
+            HashSet<Method> methods = staticRegisteredMethods.get(listener);
+
+            for (Method method : methods) {
+                Class<?> parameterType = method.getParameterTypes()[0];
+                if (parameterType.equals(PacketEvent.class)
+                        || parameterType.isInstance(event)) {
+
+                    PacketHandler annotation = method.getAnnotation(PacketHandler.class);
+                    try {
+                        method.invoke(listener, event);
+                    } catch (IllegalAccessException | InvocationTargetException ex) {
+                        ex.printStackTrace();
+                    }
+                    if (event instanceof CancellableEvent) {
+                        CancellableEvent ce = (CancellableEvent) event;
+                        if (annotation.priority() >= eventPriority) {
+                            eventPriority = annotation.priority();
+                            isCancelled = ce.isCancelled();
+                        }
+                    }
+                }
+            }
+        }
+        if (event instanceof CancellableEvent) {
+            CancellableEvent ce = (CancellableEvent) event;
+            ce.setCancelled(isCancelled);
+        }
+    }
+
+    /**
+     * Register a legacy packet event listener.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listener {@link PacketListener}
+     */
+    @Deprecated
+    public void registerListener(final PacketListener listener) {
+        final HashSet<Method> methods = new HashSet<>();
+        for (final Method m : listener.getClass().getDeclaredMethods()) {
+            if (!m.isAccessible()) {
+                m.setAccessible(true);
+            }
+            if (m.isAnnotationPresent(PacketHandler.class)
+                    && m.getParameterTypes().length == 1) {
+                methods.add(m);
+            }
+        }
+
+        if (!methods.isEmpty()) {
+            staticRegisteredMethods.put(listener, methods);
+        }
+    }
+
+    /**
+     * Register multiple legacy packet event listeners with one method.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listeners {@link PacketListener}
+     */
+    @Deprecated
+    public void registerListeners(final PacketListener... listeners) {
+        for (final PacketListener listener : listeners) {
+            registerListener(listener);
+        }
+    }
+
+    /**
+     * Unregister a legacy packet event listener.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listener {@link PacketListener}
+     */
+    @Deprecated
+    public void unregisterListener(final PacketListener listener) {
+        staticRegisteredMethods.remove(listener);
+    }
+
+    /**
+     * Unregister multiple legacy packet event listeners with one method.
+     * Not recommended to use the deprecated event listener.
+     *
+     * @param listeners {@link PacketListener}
+     */
+    @Deprecated
+    public void unregisterListeners(final PacketListener... listeners) {
+        for (final PacketListener listener : listeners) {
+            unregisterListener(listener);
+        }
+    }
+
+    /**
+     * Unregister all legacy packet event listeners.
+     */
+    @Deprecated
+    public void unregisterAllListeners() {
+        staticRegisteredMethods.clear();
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/manager/EventManagerModern.java

@@ -0,0 +1,114 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.manager;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.event.PacketEvent;
+import io.github.retrooper.packetevents.event.PacketListenerAbstract;
+import io.github.retrooper.packetevents.event.eventtypes.CancellableEvent;
+import io.github.retrooper.packetevents.event.priority.PacketEventPriority;
+import io.github.retrooper.packetevents.event.PacketListenerPriority;
+
+import java.util.HashSet;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Level;
+
+class EventManagerModern {
+    private final Map<Byte, HashSet<PacketListenerAbstract>> listenersMap = new ConcurrentHashMap<>();
+
+    /**
+     * Call the PacketEvent.
+     * This method processes the event on all the registered dynamic packet event listeners.
+     * The {@link PacketEventPriority#LOWEST} prioritized listeners will be processing first,
+     * the {@link PacketEventPriority#MONITOR} will be processing last and can
+     * be the final decider whether the event has been cancelled or not.
+     * This call event also calls the legacy event manager call event.
+     *
+     * @param event {@link PacketEvent}
+     * @see EventManagerLegacy#callEvent(PacketEvent, byte)
+     */
+    public void callEvent(final PacketEvent event) {
+        boolean cancel = false;
+        if (event instanceof CancellableEvent) {
+            cancel = ((CancellableEvent) event).isCancelled();
+        }
+        byte highestReachedPriority = (byte) (PacketListenerPriority.LOWEST.getId() - 1);
+        for (byte priority = PacketListenerPriority.LOWEST.getId(); priority <= PacketListenerPriority.MONITOR.getId(); priority++) {
+            HashSet<PacketListenerAbstract> listeners = listenersMap.get(priority);
+            if (listeners != null) {
+                for (PacketListenerAbstract listener : listeners) {
+                    try {
+                        event.call(listener);
+                    } catch (Exception ex) {
+                        PacketEvents.get().getPlugin().getLogger()
+                                .log(Level.SEVERE, "PacketEvents found an exception while calling a packet listener.", ex);
+                    }
+                    //TODO Remove, because its redundant. We are only keeping it for compatibility with the legacy event manager.
+                    if (event instanceof CancellableEvent) {
+                        if (priority > highestReachedPriority) {
+                            CancellableEvent ce = (CancellableEvent) event;
+                            cancel = ce.isCancelled();
+                            highestReachedPriority = priority;
+                        }
+                    }
+                }
+                //TODO Remove. This is also redundant. The listeners are always called in order, the event is always being modified by each listener. The last listener therefore has the last decision on the cancellation.
+                if (event instanceof CancellableEvent) {
+                    CancellableEvent ce = (CancellableEvent) event;
+                    ce.setCancelled(cancel);
+                }
+            }
+        }
+        PEEventManager.EVENT_MANAGER_LEGACY.callEvent(event, highestReachedPriority);
+    }
+
+    /**
+     * Register the dynamic packet event listener.
+     *
+     * @param listener {@link PacketListenerAbstract}
+     */
+    public synchronized void registerListener(final PacketListenerAbstract listener) {
+        byte priority = listener.getPriority().getId();
+        HashSet<PacketListenerAbstract> listenerSet = listenersMap.get(priority);
+        if (listenerSet == null) {
+            listenerSet = new HashSet<>();
+        }
+        listenerSet.add(listener);
+        listenersMap.put(priority, listenerSet);
+    }
+
+    /**
+     * Register multiple dynamic packet event listeners with one method.
+     *
+     * @param listeners {@link PacketListenerAbstract}
+     */
+    public synchronized void registerListeners(PacketListenerAbstract... listeners) {
+        for (PacketListenerAbstract listener : listeners) {
+            registerListener(listener);
+        }
+    }
+
+    /**
+     * Unregister all dynamic packet event listeners.
+     */
+    public synchronized void unregisterAllListeners() {
+        listenersMap.clear();
+    }
+}

src/main/java/io/github/retrooper/packetevents/event/manager/PEEventManager.java

@@ -0,0 +1,32 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.manager;
+
+/**
+ * Class storing a static instance of the dynamic and the legacy event manager.
+ *
+ * @author retrooper
+ * @since 1.8
+ */
+public class PEEventManager implements EventManager {
+
+    public static final EventManagerLegacy EVENT_MANAGER_LEGACY = new EventManagerLegacy();
+    public static final EventManagerModern EVENT_MANAGER_MODERN = new EventManagerModern();
+
+}

src/main/java/io/github/retrooper/packetevents/event/priority/PacketEventPriority.java

@@ -0,0 +1,92 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.event.priority;
+
+/**
+ * Event priority enum for the new event system.
+ * The event priority counts for the whole {@link io.github.retrooper.packetevents.event.PacketListenerAbstract}
+ * and not for just one event.
+ * The priority can be specified in the PacketListenerAbstract constructor.
+ * If you don't specify a priority in the constructor, it will use the {@link #NORMAL} priority.
+ *
+ * @author retrooper
+ * @since 1.6.9
+ */
+@Deprecated
+public enum PacketEventPriority {
+    /**
+     * The weakest event priority.
+     * The first to be processed(IN THE DYNAMIC EVENT SYSTEM ONLY).
+     * Use this if you need to be the first processing the event and
+     * need no power in cancelling an event or preventing an event cancellation.
+     */
+    LOWEST,
+
+    /**
+     * A weak event priority.
+     * Second to be processed(IN THE DYNAMIC EVENT SYSTEM ONLY).
+     * Use this if you would prefer to be one of the first to process the event,
+     * but don't mind if some other listener processes before you.
+     */
+    LOW,
+
+    /**
+     * Default event priority.
+     * Third to be processed(IN THE DYNAMIC EVENT SYSTEM ONLY).
+     * Use this if you don't really care/know when you process or just want to
+     * be in the middle.
+     */
+    NORMAL,
+
+    /**
+     * Higher than the {@link PacketEventPriority#NORMAL} event priority.
+     * Fourth to be processed(IN THE DYNAMIC EVENT SYSTEM ONLY).
+     * Use this if you want to process before the default event prioritized listeners.
+     */
+    HIGH,
+
+    /**
+     * Second most powerful event priority.
+     * Fifth to be processed(IN THE DYNAMIC EVENT SYSTEM ONLY).
+     * Use this if you prefer to be one of the last to process,
+     * but don't mind if some other listener really needs to process after you.
+     * Also use this if you prefer deciding if the event cancelled or not, but don't
+     * mind if some other listener urgently needs to decide over you.
+     * {@link PacketEventPriority#MONITOR} is rarely ever recommended to use.
+     */
+    HIGHEST,
+
+    /**
+     * Most powerful event priority.
+     * Last(Sixth) to be processed(IN THE DYNAMIC EVENT SYSTEM ONLY).
+     * Use this if you urgently need to be the last to process
+     * or urgently need to be the final decider whether the event has cancelled or not.
+     * This is rarely recommended.
+     */
+    MONITOR;
+
+
+    public static PacketEventPriority getPacketEventPriority(byte bytePriority) {
+        return values()[bytePriority];
+    }
+
+    public byte getPriorityValue() {
+        return (byte) ordinal();
+    }
+}

src/main/java/io/github/retrooper/packetevents/example/MainExample.java

@@ -1,21 +0,0 @@
-package io.github.retrooper.packetevents.example;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import org.bukkit.plugin.java.JavaPlugin;
-
-public class MainExample extends JavaPlugin {
-
-    @Override
-    public void onEnable() {
-        PacketEvents.start(this);
-
-        PacketEvents.getServerTickTask().cancel();
-    }
-
-    @Override
-    public void onDisable() {
-        PacketEvents.stop();
-    }
-
-
-}

src/main/java/io/github/retrooper/packetevents/exceptions/PacketEventsLoadFailureException.java

@@ -0,0 +1,45 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.exceptions;
+
+/**
+ * An exception thrown by PacketEvents when the {@link io.github.retrooper.packetevents.PacketEvents#load}
+ * method fails to execute without any exceptions.
+ * Resulting in PacketEvents failing to load.
+ *
+ * @author retrooper
+ * @since 1.7.6
+ */
+public class PacketEventsLoadFailureException extends RuntimeException {
+    public PacketEventsLoadFailureException(String message) {
+        super(message);
+    }
+
+    public PacketEventsLoadFailureException(String message, Throwable cause) {
+        super(message, cause);
+    }
+
+    public PacketEventsLoadFailureException() {
+        this("PacketEvents failed to load...");
+    }
+
+    public PacketEventsLoadFailureException(Throwable cause) {
+        this("PacketEvents failed to load...", cause);
+    }
+}

src/main/java/io/github/retrooper/packetevents/exceptions/WrapperFieldNotFoundException.java

@@ -0,0 +1,40 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.exceptions;
+
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+/**
+ * An exception thrown by PacketEvents when a wrapper fails
+ * to find a field.
+ *
+ * @author retrooper
+ * @see io.github.retrooper.packetevents.packetwrappers.WrappedPacket#read(int, Class)
+ * @see io.github.retrooper.packetevents.packetwrappers.WrappedPacket#write(Class, int, Object)
+ * @since 1.6.9
+ */
+public class WrapperFieldNotFoundException extends RuntimeException {
+    public WrapperFieldNotFoundException(String message) {
+        super(message);
+    }
+
+    public WrapperFieldNotFoundException(Class<?> packetClass, Class<?> type, int index) {
+        this("PacketEvents failed to find a " + ClassUtil.getClassSimpleName(type) + " indexed " + index + " by its type in the " + packetClass.getName() + " class!");
+    }
+}

src/main/java/io/github/retrooper/packetevents/exceptions/WrapperUnsupportedUsageException.java

@@ -0,0 +1,42 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.exceptions;
+
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+/**
+ * An exception thrown by PacketEvents when a wrapper is used although it isn't supported on the local server version.
+ * Make sure to decompile a wrapper before using it, if you are unsure if it is supported through out all the server versions.
+ * We override a {@link WrappedPacket#isSupported()} method if it isn't supported on all server versions.
+ *
+ * @author retrooper
+ * @see WrappedPacket#isSupported()
+ * @see WrappedPacket.SupportedVersions
+ * @since 1.7
+ */
+public class WrapperUnsupportedUsageException extends RuntimeException {
+    public WrapperUnsupportedUsageException(String message) {
+        super(message);
+    }
+
+    public WrapperUnsupportedUsageException(Class<? extends WrappedPacket> wrapperClass) {
+        this("You are using a packet wrapper which happens to be unsupported on the local server version. Packet wrapper you attempted to use: " + ClassUtil.getClassSimpleName(wrapperClass));
+    }
+}

src/main/java/io/github/retrooper/packetevents/handler/NettyPacketHandler.java

@@ -1,67 +0,0 @@
-package io.github.retrooper.packetevents.handler;
-
-import io.github.retrooper.packetevents.PacketEvents;
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.event.impl.PacketReceiveEvent;
-import io.github.retrooper.packetevents.event.impl.PacketSendEvent;
-import org.bukkit.entity.Player;
-
-import java.util.HashSet;
-import java.util.UUID;
-import java.util.concurrent.Future;
-
-public class NettyPacketHandler {
-    public static final String handlerName = "packet_handler";
-    private static final ServerVersion version = PacketEvents.getServerVersion();
-
-    public static final HashSet<UUID> injectedSet = new HashSet<UUID>();
-
-    public static void injectPlayer(final Player player) {
-        if (!hasInjected(player)) {
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
-                NettyPacketHandler_7.injectPlayer(player);
-            } else {
-                NettyPacketHandler_8.injectPlayer(player);
-            }
-            injectedSet.add(player.getUniqueId());
-        }
-    }
-
-    public static Future<?> uninjectPlayer(final Player player) {
-        if (hasInjected(player)) {
-            injectedSet.remove(player.getUniqueId());
-            if (version.isLowerThan(ServerVersion.v_1_8)) {
-                return NettyPacketHandler_7.uninjectPlayer(player);
-            } else {
-                return NettyPacketHandler_8.uninjectPlayer(player);
-            }
-        }
-        return null;
-    }
-
-    public static boolean hasInjected(final Player player) {
-        return injectedSet.contains(player.getUniqueId());
-    }
-
-    public static Object read(final Player receiver, final Object packet) {
-        final String packetName = packet.getClass().getSimpleName();
-        final PacketSendEvent packetSendEvent = new PacketSendEvent(receiver, packetName, packet);
-        PacketEvents.getEventManager().callEvent(packetSendEvent);
-        if (!packetSendEvent.isCancelled()) {
-            return packet;
-        }
-        return null;
-    }
-
-    public static Object write(final Player sender, final Object packet) {
-        final String packetName = packet.getClass().getSimpleName();
-        final PacketReceiveEvent packetReceiveEvent = new PacketReceiveEvent(sender, packetName, packet);
-        PacketEvents.getEventManager().callEvent(packetReceiveEvent);
-        if (!packetReceiveEvent.isCancelled()) {
-            return packet;
-        }
-        return null;
-    }
-
-
-}

src/main/java/io/github/retrooper/packetevents/handler/NettyPacketHandler_7.java

@@ -1,44 +0,0 @@
-package io.github.retrooper.packetevents.handler;
-
-import io.github.retrooper.packetevents.utils.NMSUtils;
-import net.minecraft.util.io.netty.channel.*;
-import org.bukkit.entity.Player;
-
-import java.util.concurrent.Future;
-
-final class NettyPacketHandler_7 {
-
-    public static void injectPlayer(final Player player) {
-        final ChannelDuplexHandler channelDuplexHandler = new ChannelDuplexHandler() {
-            @Override
-            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
-                Object packet = NettyPacketHandler.read(player, msg);
-                if(packet == null) {
-                    return;
-                }
-                super.channelRead(ctx, msg);
-            }
-
-            @Override
-            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
-                Object packet = NettyPacketHandler.write(player, msg);
-                if(packet == null) {
-                    return;
-                }
-                super.write(ctx, msg, promise);
-            }
-        };
-        final ChannelPipeline pipeline = ((Channel) NMSUtils.getChannel(player)).pipeline();
-        pipeline.addBefore(NettyPacketHandler.handlerName, player.getName(), channelDuplexHandler);
-    }
-
-    public static Future<?> uninjectPlayer(final Player player) {
-        final Channel channel = (Channel) NMSUtils.getChannel(player);
-        return channel.eventLoop().submit(new Runnable() {
-            @Override
-            public void run() {
-                channel.pipeline().remove(player.getName());
-            }
-        });
-    }
-}

src/main/java/io/github/retrooper/packetevents/handler/NettyPacketHandler_8.java

@@ -1,43 +0,0 @@
-package io.github.retrooper.packetevents.handler;
-
-import io.github.retrooper.packetevents.utils.NMSUtils;
-import io.netty.channel.*;
-import org.bukkit.entity.Player;
-
-import java.util.concurrent.Future;
-
-final class NettyPacketHandler_8 {
-    public static void injectPlayer(final Player player) {
-        final ChannelDuplexHandler channelDuplexHandler = new ChannelDuplexHandler() {
-            @Override
-            public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
-                Object packet = NettyPacketHandler.read(player, msg);
-                if(packet == null) {
-                    return;
-                }
-                super.channelRead(ctx, msg);
-            }
-
-            @Override
-            public void write(ChannelHandlerContext ctx, Object msg, ChannelPromise promise) throws Exception {
-                Object packet = NettyPacketHandler.write(player, msg);
-                if(packet == null) {
-                    return;
-                }
-                super.write(ctx, msg, promise);
-            }
-        };
-        final ChannelPipeline pipeline = ((Channel) NMSUtils.getChannel(player)).pipeline();
-        pipeline.addBefore(NettyPacketHandler.handlerName, player.getName(), channelDuplexHandler);
-    }
-
-    public static Future<?> uninjectPlayer(final Player player) {
-        final Channel channel = (Channel) NMSUtils.getChannel(player);
-        return channel.eventLoop().submit(new Runnable() {
-            @Override
-            public void run() {
-                channel.pipeline().remove(player.getName());
-            }
-        });
-    }
-}

src/main/java/io/github/retrooper/packetevents/injector/ChannelInjector.java

@@ -0,0 +1,39 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector;
+
+import org.bukkit.entity.Player;
+
+public interface ChannelInjector {
+    default boolean isBound() {
+        return true;
+    }
+
+    void inject();
+
+    void eject();
+
+    void injectPlayer(Player player);
+
+    void ejectPlayer(Player player);
+
+    boolean hasInjected(Player player);
+
+    void sendPacket(Object channel, Object rawNMSPacket);
+}

src/main/java/io/github/retrooper/packetevents/injector/EarlyInjector.java

@@ -0,0 +1,25 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector;
+
+import org.bukkit.entity.Player;
+
+public interface EarlyInjector extends ChannelInjector {
+    void updatePlayerObject(Player player, Object channel);
+}

src/main/java/io/github/retrooper/packetevents/injector/GlobalChannelInjector.java

@@ -0,0 +1,90 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.event.impl.PlayerEjectEvent;
+import io.github.retrooper.packetevents.event.impl.PlayerInjectEvent;
+import io.github.retrooper.packetevents.injector.legacy.early.EarlyChannelInjectorLegacy;
+import io.github.retrooper.packetevents.injector.legacy.late.LateChannelInjectorLegacy;
+import io.github.retrooper.packetevents.injector.modern.early.EarlyChannelInjectorModern;
+import io.github.retrooper.packetevents.injector.modern.late.LateChannelInjectorModern;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import org.bukkit.entity.Player;
+
+public class GlobalChannelInjector {
+    private ChannelInjector injector;
+
+    public void load() {
+        boolean legacy = NMSUtils.legacyNettyImportMode;
+        if (!PacketEvents.get().getSettings().shouldUseCompatibilityInjector()) {
+            injector = legacy ? new EarlyChannelInjectorLegacy() : new EarlyChannelInjectorModern();
+        } else {
+            injector = legacy ? new LateChannelInjectorLegacy() : new LateChannelInjectorModern();
+        }
+    }
+
+    public boolean isBound() {
+        return injector.isBound();
+    }
+
+    public void inject() {
+        try {
+            //Try inject...
+            injector.inject();
+        } catch (Exception ex) {
+            //Failed to inject! Let us revert to the compatibility injector and re-inject.
+            if (injector instanceof EarlyInjector) {
+                PacketEvents.get().getSettings().compatInjector(true);
+                load();
+                injector.inject();
+                PacketEvents.get().getPlugin().getLogger().warning("[packetevents] Failed to inject with the Early Injector. Reverting to the Compatibility/Late Injector... This is just a warning, but please report this!");
+                ex.printStackTrace();
+            }
+        }
+    }
+
+    public void eject() {
+        injector.eject();
+    }
+
+    public void injectPlayer(Player player) {
+        PlayerInjectEvent injectEvent = new PlayerInjectEvent(player);
+        PacketEvents.get().callEvent(injectEvent);
+        if (!injectEvent.isCancelled()) {
+            injector.injectPlayer(player);
+        }
+    }
+
+    public void ejectPlayer(Player player) {
+        PlayerEjectEvent ejectEvent = new PlayerEjectEvent(player);
+        PacketEvents.get().callEvent(ejectEvent);
+        if (!ejectEvent.isCancelled()) {
+            injector.ejectPlayer(player);
+        }
+    }
+
+    public boolean hasInjected(Player player) {
+        return injector.hasInjected(player);
+    }
+
+    public void sendPacket(Object ch, Object rawNMSPacket) {
+        injector.sendPacket(ch, rawNMSPacket);
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/LateInjector.java

@@ -0,0 +1,23 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector;
+
+public interface LateInjector extends ChannelInjector {
+
+}

src/main/java/io/github/retrooper/packetevents/injector/legacy/PlayerChannelHandlerLegacy.java

@@ -0,0 +1,57 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.legacy;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.processor.PacketProcessorInternal;
+import net.minecraft.util.io.netty.channel.ChannelDuplexHandler;
+import net.minecraft.util.io.netty.channel.ChannelHandlerContext;
+import net.minecraft.util.io.netty.channel.ChannelPromise;
+import org.bukkit.entity.Player;
+
+public class PlayerChannelHandlerLegacy extends ChannelDuplexHandler {
+    /**
+     * Associated player.
+     * This is null until we inject the player.
+     */
+    public volatile Player player;
+
+    @Override
+    public void channelRead(final ChannelHandlerContext ctx, Object packet) throws Exception {
+        PacketProcessorInternal.PacketData data = PacketEvents.get().getInternalPacketProcessor().read(player, ctx.channel(), packet);
+        if (data.packet != null) {
+            super.channelRead(ctx, data.packet);
+            PacketEvents.get().getInternalPacketProcessor().postRead(player, ctx.channel(), data.packet);
+        }
+    }
+
+    @Override
+    public void write(final ChannelHandlerContext ctx, Object packet, final ChannelPromise promise) throws Exception {
+        PacketProcessorInternal.PacketData data = PacketEvents.get().getInternalPacketProcessor().write(player, ctx.channel(), packet);
+        if (data.postAction != null) {
+            promise.addListener(f -> {
+                data.postAction.run();
+            });
+        }
+        if (data.packet != null) {
+            super.write(ctx, data.packet, promise);
+            PacketEvents.get().getInternalPacketProcessor().postWrite(player, ctx.channel(), data.packet);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/legacy/early/EarlyChannelInjectorLegacy.java

@@ -0,0 +1,305 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.legacy.early;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.injector.EarlyInjector;
+import io.github.retrooper.packetevents.injector.legacy.PlayerChannelHandlerLegacy;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.list.ListWrapper;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import net.minecraft.util.io.netty.channel.Channel;
+import net.minecraft.util.io.netty.channel.ChannelFuture;
+import net.minecraft.util.io.netty.channel.ChannelHandler;
+import net.minecraft.util.io.netty.channel.ChannelInitializer;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.PluginDescriptionFile;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class EarlyChannelInjectorLegacy implements EarlyInjector {
+    private final List<ChannelFuture> injectedFutures = new ArrayList<>();
+    private final List<Map<Field, Object>> injectedLists = new ArrayList<>();
+
+    @Override
+    public boolean isBound() {
+        try {
+            Object connection = NMSUtils.getMinecraftServerConnection();
+            if (connection == null) {
+                return false;
+            }
+            for (Field field : connection.getClass().getDeclaredFields()) {
+                field.setAccessible(true);
+                final Object value = field.get(connection);
+                if (value instanceof List) {
+                    // Inject the list
+                    synchronized (value) {
+                        for (Object o : (List<?>) value) {
+                            if (o instanceof ChannelFuture) {
+                                return true;
+                            } else {
+                                break; // not the right list.
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Exception ignored) {
+        }
+        return false;
+    }
+
+    @Override
+    public void inject() {
+        try {
+            Object serverConnection = NMSUtils.getMinecraftServerConnection();
+            for (Field field : serverConnection.getClass().getDeclaredFields()) {
+                field.setAccessible(true);
+                Object value = null;
+                try {
+                    value = field.get(serverConnection);
+                } catch (IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                if (value instanceof List) {
+                    //Get the list.
+                    List<?> listWrapper = new ListWrapper((List<?>) value) {
+                        @Override
+                        public void processAdd(Object o) {
+                            if (o instanceof ChannelFuture) {
+                                try {
+                                    injectChannelFuture((ChannelFuture) o);
+                                } catch (Exception ex) {
+                                    ex.printStackTrace();
+                                }
+                            }
+                        }
+                    };
+                    HashMap<Field, Object> map = new HashMap<>();
+                    map.put(field, serverConnection);
+                    injectedLists.add(map);
+
+                    field.set(serverConnection, listWrapper);
+
+                    synchronized (listWrapper) {
+                        for (Object serverChannel : (List<?>) value) {
+                            //Is this the server channel future list?
+                            if (serverChannel instanceof ChannelFuture) {
+                                //Yes it is...
+                                injectChannelFuture((ChannelFuture) serverChannel);
+                            } else {
+                                break;//Wrong list
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Exception ex) {
+            PacketEvents.get().getPlugin().getLogger().severe("PacketEvents failed to inject!");
+            ex.printStackTrace();
+        }
+
+        //Player channels might have been registered already. Let us add our handlers. We are a little late though.
+        //This only happens when you join extremely early on older versions of minecraft.
+        List<Object> networkManagers = NMSUtils.getNetworkManagers();
+        synchronized (networkManagers) {
+            for (Object networkManager : networkManagers) {
+                WrappedPacket networkManagerWrapper = new WrappedPacket(new NMSPacket(networkManager));
+                Channel channel = (Channel) networkManagerWrapper.readObject(0, NMSUtils.nettyChannelClass);
+                if (channel == null) {
+                    continue;
+                }
+
+                if (channel.pipeline().get(PacketEvents.get().getHandlerName()) != null) {
+                    channel.pipeline().remove(PacketEvents.get().getHandlerName());
+                }
+
+                if (channel.pipeline().get("packet_handler") != null) {
+                    channel.pipeline().addBefore("packet_handler", PacketEvents.get().getHandlerName(), new PlayerChannelHandlerLegacy());
+                }
+            }
+        }
+    }
+
+
+    private void injectChannelFuture(ChannelFuture channelFuture) {
+        List<String> channelHandlerNames = channelFuture.channel().pipeline().names();
+        ChannelHandler bootstrapAcceptor = null;
+        Field bootstrapAcceptorField = null;
+        for (String handlerName : channelHandlerNames) {
+            ChannelHandler handler = channelFuture.channel().pipeline().get(handlerName);
+            try {
+                bootstrapAcceptorField = handler.getClass().getDeclaredField("childHandler");
+                bootstrapAcceptorField.setAccessible(true);
+                bootstrapAcceptorField.get(handler);
+                bootstrapAcceptor = handler;
+            } catch (Exception ignored) {
+
+            }
+        }
+
+        if (bootstrapAcceptor == null) {
+            bootstrapAcceptor = channelFuture.channel().pipeline().first();
+        }
+
+        ChannelInitializer<?> oldChannelInitializer = null;
+        try {
+            oldChannelInitializer = (ChannelInitializer<?>) bootstrapAcceptorField.get(bootstrapAcceptor);
+
+            ChannelInitializer<?> channelInitializer = new PEChannelInitializerLegacy(oldChannelInitializer);
+
+            //Replace the old channel initializer with our own.
+            bootstrapAcceptorField.setAccessible(true);
+            bootstrapAcceptorField.set(bootstrapAcceptor, channelInitializer);
+
+            injectedFutures.add(channelFuture);
+        } catch (IllegalAccessException e) {
+            ClassLoader cl = bootstrapAcceptor.getClass().getClassLoader();
+            if (cl.getClass().getName().equals("org.bukkit.plugin.java.PluginClassLoader")) {
+                PluginDescriptionFile yaml = null;
+                try {
+                    yaml = (PluginDescriptionFile) PluginDescriptionFile.class.getDeclaredField("description").get(cl);
+                } catch (IllegalAccessException | NoSuchFieldException e2) {
+                    e2.printStackTrace();
+                }
+                throw new IllegalStateException("PacketEvents failed to inject, because of " + bootstrapAcceptor.getClass().getName() + ", you might want to try running without " + yaml.getName() + "?");
+            } else {
+                throw new IllegalStateException("PacketEvents failed to find core component 'childHandler', please check your plugins. issue: " + bootstrapAcceptor.getClass().getName());
+            }
+        }
+
+    }
+
+    @Override
+    public void eject() {
+        Field childHandlerField = null;
+        for (ChannelFuture future : injectedFutures) {
+            List<String> names = future.channel().pipeline().names();
+            ChannelHandler bootstrapAcceptor = null;
+            // Pick best
+            for (String name : names) {
+                try {
+                    ChannelHandler handler = future.channel().pipeline().get(name);
+                    if (childHandlerField == null) {
+                        childHandlerField = handler.getClass().getDeclaredField("childHandler");
+                        childHandlerField.setAccessible(true);
+                    }
+
+                    ChannelInitializer<Channel> oldInit = (ChannelInitializer<Channel>) childHandlerField.get(handler);
+                    if (oldInit instanceof PEChannelInitializerLegacy) {
+                        bootstrapAcceptor = handler;
+                    }
+                } catch (Exception e) {
+                    // Not this one
+                }
+            }
+            // Default to first
+            if (bootstrapAcceptor == null) {
+                bootstrapAcceptor = future.channel().pipeline().first();
+            }
+
+            try {
+                ChannelInitializer<Channel> oldInit = (ChannelInitializer<Channel>) childHandlerField.get(bootstrapAcceptor);
+                if (oldInit instanceof PEChannelInitializerLegacy) {
+                    childHandlerField.setAccessible(true);
+                    childHandlerField.set(bootstrapAcceptor, ((PEChannelInitializerLegacy) oldInit).getOldChannelInitializer());
+                }
+            } catch (Exception e) {
+                PacketEvents.get().getPlugin().getLogger().severe("PacketEvents failed to eject the injection handler! Please reboot!");
+            }
+        }
+        injectedFutures.clear();
+
+        for (Map<Field, Object> map : injectedLists) {
+            try {
+                for (Field key : map.keySet()) {
+                    key.setAccessible(true);
+                    Object o = map.get(key);
+                    if (o instanceof ListWrapper) {
+                        key.set(o, ((ListWrapper) o).getOriginalList());
+                    }
+                }
+
+            } catch (IllegalAccessException e) {
+                PacketEvents.get().getPlugin().getLogger().severe("PacketEvents failed to eject the injection handler! Please reboot!!");
+            }
+        }
+
+        injectedLists.clear();
+    }
+
+    @Override
+    public void injectPlayer(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel != null) {
+            updatePlayerObject(player, channel);
+        }
+    }
+
+    @Override
+    public void ejectPlayer(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel != null) {
+            try {
+                ((Channel) channel).pipeline().remove(PacketEvents.get().getHandlerName());
+            } catch (Exception ignored) {
+
+            }
+        }
+    }
+
+    @Override
+    public boolean hasInjected(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel == null) {
+            return false;
+        }
+        PlayerChannelHandlerLegacy handler = getHandler(channel);
+        return handler != null && handler.player != null;
+    }
+
+    @Override
+    public void sendPacket(Object ch, Object rawNMSPacket) {
+        Channel channel = (Channel) ch;
+        channel.writeAndFlush(rawNMSPacket);
+    }
+
+    private PlayerChannelHandlerLegacy getHandler(Object rawChannel) {
+        Channel channel = (Channel) rawChannel;
+        ChannelHandler handler = channel.pipeline().get(PacketEvents.get().getHandlerName());
+        if (handler instanceof PlayerChannelHandlerLegacy) {
+            return (PlayerChannelHandlerLegacy) handler;
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public void updatePlayerObject(Player player, Object rawChannel) {
+        PlayerChannelHandlerLegacy handler = getHandler(rawChannel);
+        if (handler != null) {
+            handler.player = player;
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/legacy/early/PEChannelInitializerLegacy.java

@@ -0,0 +1,59 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.legacy.early;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.injector.legacy.PlayerChannelHandlerLegacy;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import net.minecraft.util.io.netty.channel.Channel;
+import net.minecraft.util.io.netty.channel.ChannelInitializer;
+
+import java.lang.reflect.Method;
+
+public class PEChannelInitializerLegacy extends ChannelInitializer<Channel> {
+    private final ChannelInitializer<?> oldChannelInitializer;
+    private Method initChannelMethod;
+
+    public PEChannelInitializerLegacy(ChannelInitializer<?> oldChannelInitializer) {
+        this.oldChannelInitializer = oldChannelInitializer;
+        load();
+    }
+
+    private void load() {
+        initChannelMethod = Reflection.getMethod(oldChannelInitializer.getClass(), "initChannel", 0);
+    }
+
+    public ChannelInitializer<?> getOldChannelInitializer() {
+        return oldChannelInitializer;
+    }
+
+    @Override
+    protected void initChannel(Channel channel) throws Exception {
+        initChannelMethod.invoke(oldChannelInitializer, channel);
+        PlayerChannelHandlerLegacy channelHandler = new PlayerChannelHandlerLegacy();
+        if (channel.pipeline().get("packet_handler") != null) {
+            String handlerName = PacketEvents.get().getHandlerName();
+            if (channel.pipeline().get(handlerName) != null) {
+                PacketEvents.get().getPlugin().getLogger().warning("[PacketEvents] Attempted to initialize a channel twice!");
+            } else {
+                channel.pipeline().addBefore("packet_handler", handlerName, channelHandler);
+            }
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/legacy/late/LateChannelInjectorLegacy.java

@@ -0,0 +1,69 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.legacy.late;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.injector.LateInjector;
+import io.github.retrooper.packetevents.injector.legacy.PlayerChannelHandlerLegacy;
+import net.minecraft.util.io.netty.channel.Channel;
+import org.bukkit.entity.Player;
+
+public class LateChannelInjectorLegacy implements LateInjector {
+    @Override
+    public void inject() {
+
+    }
+
+    @Override
+    public void eject() {
+
+    }
+
+    @Override
+    public void injectPlayer(Player player) {
+        PlayerChannelHandlerLegacy playerChannelHandlerLegacy = new PlayerChannelHandlerLegacy();
+        playerChannelHandlerLegacy.player = player;
+        Channel channel = (Channel) PacketEvents.get().getPlayerUtils().getChannel(player);
+        channel.pipeline().addBefore("packet_handler", PacketEvents.get().getHandlerName(), playerChannelHandlerLegacy);
+    }
+
+    @Override
+    public void ejectPlayer(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel != null) {
+            try {
+                ((Channel) channel).pipeline().remove(PacketEvents.get().getHandlerName());
+            } catch (Exception ignored) {
+
+            }
+        }
+    }
+
+    @Override
+    public boolean hasInjected(Player player) {
+        Channel channel = (Channel) PacketEvents.get().getPlayerUtils().getChannel(player);
+        return channel.pipeline().get(PacketEvents.get().getHandlerName()) != null;
+    }
+
+    @Override
+    public void sendPacket(Object rawChannel, Object packet) {
+        Channel channel = (Channel) rawChannel;
+        channel.pipeline().writeAndFlush(packet);
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/modern/PlayerChannelHandlerModern.java

@@ -0,0 +1,57 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.modern;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.processor.PacketProcessorInternal;
+import io.netty.channel.ChannelDuplexHandler;
+import io.netty.channel.ChannelHandlerContext;
+import io.netty.channel.ChannelPromise;
+import org.bukkit.entity.Player;
+
+public class PlayerChannelHandlerModern extends ChannelDuplexHandler {
+    /**
+     * Associated player.
+     * This is null until we inject the player.
+     */
+    public volatile Player player;
+
+    @Override
+    public void channelRead(final ChannelHandlerContext ctx, Object packet) throws Exception {
+        PacketProcessorInternal.PacketData data = PacketEvents.get().getInternalPacketProcessor().read(player, ctx.channel(), packet);
+        if (data.packet != null) {
+            super.channelRead(ctx, data.packet);
+            PacketEvents.get().getInternalPacketProcessor().postRead(player, ctx.channel(), data.packet);
+        }
+    }
+
+    @Override
+    public void write(final ChannelHandlerContext ctx, Object packet, final ChannelPromise promise) throws Exception {
+        PacketProcessorInternal.PacketData data = PacketEvents.get().getInternalPacketProcessor().write(player, ctx.channel(), packet);
+        if (data.postAction != null) {
+            promise.addListener(f -> {
+                data.postAction.run();
+            });
+        }
+        if (data.packet != null) {
+            super.write(ctx, data.packet, promise);
+            PacketEvents.get().getInternalPacketProcessor().postWrite(player, ctx.channel(), data.packet);
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/modern/early/EarlyChannelInjectorModern.java

@@ -0,0 +1,314 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.modern.early;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.injector.EarlyInjector;
+import io.github.retrooper.packetevents.injector.modern.PlayerChannelHandlerModern;
+import io.github.retrooper.packetevents.packetwrappers.NMSPacket;
+import io.github.retrooper.packetevents.packetwrappers.WrappedPacket;
+import io.github.retrooper.packetevents.utils.list.ListWrapper;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelFuture;
+import io.netty.channel.ChannelHandler;
+import io.netty.channel.ChannelInitializer;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.PluginDescriptionFile;
+
+import java.lang.reflect.Field;
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class EarlyChannelInjectorModern implements EarlyInjector {
+    private final List<ChannelFuture> injectedFutures = new ArrayList<>();
+    private final List<Map<Field, Object>> injectedLists = new ArrayList<>();
+
+    @Override
+    public boolean isBound() {
+        try {
+            Object connection = NMSUtils.getMinecraftServerConnection();
+            if (connection == null) {
+                return false;
+            }
+            for (Field field : connection.getClass().getDeclaredFields()) {
+                field.setAccessible(true);
+                final Object value = field.get(connection);
+                if (value instanceof List) {
+                    // Inject the list
+                    synchronized (value) {
+                        for (Object o : (List) value) {
+                            if (o instanceof ChannelFuture) {
+                                return true;
+                            } else {
+                                break; // not the right list.
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Exception e) {
+        }
+        return false;
+    }
+
+    @Override
+    public void inject() {
+        try {
+            if (PaperChannelInjector.PAPER_INJECTION_METHOD) {
+                PaperChannelInjector.setPaperChannelInitializeListener();
+                return;
+            }
+            Object serverConnection = NMSUtils.getMinecraftServerConnection();
+            for (Field field : serverConnection.getClass().getDeclaredFields()) {
+                field.setAccessible(true);
+                Object value = null;
+                try {
+                    value = field.get(serverConnection);
+                } catch (IllegalAccessException e) {
+                    e.printStackTrace();
+                }
+                if (value instanceof List) {
+                    //Get the list.
+                    List listWrapper = new ListWrapper((List) value) {
+                        @Override
+                        public void processAdd(Object o) {
+                            if (o instanceof ChannelFuture) {
+                                try {
+                                    injectChannelFuture((ChannelFuture) o);
+                                } catch (Exception ex) {
+                                    ex.printStackTrace();
+                                }
+                            }
+                        }
+                    };
+                    HashMap<Field, Object> map = new HashMap<>();
+                    map.put(field, serverConnection);
+                    injectedLists.add(map);
+
+                    field.set(serverConnection, listWrapper);
+
+                    synchronized (listWrapper) {
+                        for (Object serverChannel : (List) value) {
+                            //Is this the server channel future list?
+                            if (serverChannel instanceof ChannelFuture) {
+                                //Yes it is...
+                                injectChannelFuture((ChannelFuture) serverChannel);
+                            } else {
+                                break;//Wrong list
+                            }
+                        }
+                    }
+                }
+            }
+        } catch (Exception ex) {
+            throw new IllegalStateException("PacketEvents failed to inject!", ex);
+        }
+
+        //Player channels might have been registered already. Let us add our handlers. We are a little late though.
+        //This only happens when you join extremely early on older versions of minecraft.
+        List<Object> networkManagers = NMSUtils.getNetworkManagers();
+        synchronized (networkManagers) {
+            for (Object networkManager : networkManagers) {
+                WrappedPacket networkManagerWrapper = new WrappedPacket(new NMSPacket(networkManager));
+                Channel channel = (Channel) networkManagerWrapper.readObject(0, NMSUtils.nettyChannelClass);
+                if (channel == null) {
+                    continue;
+                }
+
+                if (channel.pipeline().get(PacketEvents.get().getHandlerName()) != null) {
+                    channel.pipeline().remove(PacketEvents.get().getHandlerName());
+                }
+
+                if (channel.pipeline().get("packet_handler") != null) {
+                    channel.pipeline().addBefore("packet_handler", PacketEvents.get().getHandlerName(), new PlayerChannelHandlerModern());
+                }
+            }
+        }
+    }
+
+
+    private void injectChannelFuture(ChannelFuture channelFuture) {
+        List<String> channelHandlerNames = channelFuture.channel().pipeline().names();
+        ChannelHandler bootstrapAcceptor = null;
+        Field bootstrapAcceptorField = null;
+        for (String handlerName : channelHandlerNames) {
+            ChannelHandler handler = channelFuture.channel().pipeline().get(handlerName);
+            try {
+                bootstrapAcceptorField = handler.getClass().getDeclaredField("childHandler");
+                bootstrapAcceptorField.setAccessible(true);
+                bootstrapAcceptorField.get(handler);
+                bootstrapAcceptor = handler;
+            } catch (Exception ignored) {
+            }
+        }
+
+        if (bootstrapAcceptor == null) {
+            bootstrapAcceptor = channelFuture.channel().pipeline().first();
+        }
+
+        ChannelInitializer<?> oldChannelInitializer;
+        try {
+            oldChannelInitializer = (ChannelInitializer<?>) bootstrapAcceptorField.get(bootstrapAcceptor);
+
+            ChannelInitializer<?> channelInitializer = new PEChannelInitializerModern(oldChannelInitializer);
+
+            //Replace the old channel initializer with our own.
+            bootstrapAcceptorField.setAccessible(true);
+            bootstrapAcceptorField.set(bootstrapAcceptor, channelInitializer);
+            injectedFutures.add(channelFuture);
+        } catch (IllegalAccessException e) {
+            ClassLoader cl = bootstrapAcceptor.getClass().getClassLoader();
+            if (cl.getClass().getName().equals("org.bukkit.plugin.java.PluginClassLoader")) {
+                PluginDescriptionFile yaml = null;
+                try {
+                    yaml = (PluginDescriptionFile) PluginDescriptionFile.class.getDeclaredField("description").get(cl);
+                } catch (IllegalAccessException | NoSuchFieldException e2) {
+                    e2.printStackTrace();
+                }
+                throw new IllegalStateException("PacketEvents failed to inject, because of " + bootstrapAcceptor.getClass().getName() + ", you might want to try running without " + yaml.getName() + "?");
+            } else {
+                throw new IllegalStateException("PacketEvents failed to find core component 'childHandler', please check your plugins. issue: " + bootstrapAcceptor.getClass().getName());
+            }
+        }
+
+    }
+
+    @Override
+    public void eject() {
+        // TODO: Uninject from players currently online to prevent protocol lib issues.
+        if (PaperChannelInjector.PAPER_INJECTION_METHOD) {
+            try {
+                PaperChannelInjector.removePaperChannelInitializeListener();
+            } catch (ReflectiveOperationException e) {
+                e.printStackTrace();
+            }
+        }
+        Field childHandlerField = null;
+        for (ChannelFuture future : injectedFutures) {
+            List<String> names = future.channel().pipeline().names();
+            ChannelHandler bootstrapAcceptor = null;
+            // Pick best
+            for (String name : names) {
+                try {
+                    ChannelHandler handler = future.channel().pipeline().get(name);
+                    if (childHandlerField == null) {
+                        childHandlerField = handler.getClass().getDeclaredField("childHandler");
+                        childHandlerField.setAccessible(true);
+                    }
+
+                    ChannelInitializer<Channel> oldInit = (ChannelInitializer<Channel>) childHandlerField.get(handler);
+                    if (oldInit instanceof PEChannelInitializerModern) {
+                        bootstrapAcceptor = handler;
+                    }
+                } catch (Exception ignored) {
+                    // Not this one
+                }
+            }
+            // Default to first
+            if (bootstrapAcceptor == null) {
+                bootstrapAcceptor = future.channel().pipeline().first();
+            }
+
+            try {
+                ChannelInitializer<Channel> oldInit = (ChannelInitializer<Channel>) childHandlerField.get(bootstrapAcceptor);
+                if (oldInit instanceof PEChannelInitializerModern) {
+                    childHandlerField.setAccessible(true);
+                    childHandlerField.set(bootstrapAcceptor, ((PEChannelInitializerModern) oldInit).getOldChannelInitializer());
+                }
+            } catch (Exception e) {
+                PacketEvents.get().getPlugin().getLogger().severe("PacketEvents failed to eject the injection handler! Please reboot!");
+            }
+        }
+        injectedFutures.clear();
+
+        for (Map<Field, Object> map : injectedLists) {
+            try {
+                for (Field key : map.keySet()) {
+                    key.setAccessible(true);
+                    Object o = map.get(key);
+                    if (o instanceof ListWrapper) {
+                        key.set(o, ((ListWrapper) o).getOriginalList());
+                    }
+                }
+
+            } catch (IllegalAccessException e) {
+                PacketEvents.get().getPlugin().getLogger().severe("PacketEvents failed to eject the injection handler! Please reboot!!");
+            }
+        }
+
+        injectedLists.clear();
+    }
+
+    @Override
+    public void injectPlayer(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel != null) {
+            updatePlayerObject(player, channel);
+        }
+    }
+
+    @Override
+    public void ejectPlayer(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel != null) {
+            Channel chnl = (Channel) channel;
+            try {
+                chnl.pipeline().remove(PacketEvents.get().getHandlerName());
+            } catch (Exception ignored) {
+            }
+        }
+    }
+
+    @Override
+    public boolean hasInjected(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel == null) {
+            return false;
+        }
+        PlayerChannelHandlerModern handler = getHandler(channel);
+        return handler != null && handler.player != null;
+    }
+
+    @Override
+    public void sendPacket(Object ch, Object rawNMSPacket) {
+        Channel channel = (Channel) ch;
+        channel.writeAndFlush(rawNMSPacket);
+    }
+
+    private PlayerChannelHandlerModern getHandler(Object rawChannel) {
+        Channel channel = (Channel) rawChannel;
+        ChannelHandler handler = channel.pipeline().get(PacketEvents.get().getHandlerName());
+        if (handler instanceof PlayerChannelHandlerModern) {
+            return (PlayerChannelHandlerModern) handler;
+        } else {
+            return null;
+        }
+    }
+
+    @Override
+    public void updatePlayerObject(Player player, Object rawChannel) {
+        PlayerChannelHandlerModern handler = getHandler(rawChannel);
+        if (handler != null) {
+            handler.player = player;
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/modern/early/PEChannelInitializerModern.java

@@ -0,0 +1,63 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.modern.early;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.injector.modern.PlayerChannelHandlerModern;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.netty.channel.Channel;
+import io.netty.channel.ChannelInitializer;
+
+import java.lang.reflect.Method;
+
+public class PEChannelInitializerModern extends ChannelInitializer<Channel> {
+    private final ChannelInitializer<?> oldChannelInitializer;
+    private Method initChannelMethod;
+
+    public PEChannelInitializerModern(ChannelInitializer<?> oldChannelInitializer) {
+        this.oldChannelInitializer = oldChannelInitializer;
+        load();
+    }
+
+    public static void postInitChannel(Channel channel) {
+        PlayerChannelHandlerModern channelHandler = new PlayerChannelHandlerModern();
+        if (channel.pipeline().get("packet_handler") != null) {
+            String handlerName = PacketEvents.get().getHandlerName();
+            if (channel.pipeline().get(handlerName) != null) {
+                PacketEvents.get().getPlugin().getLogger().warning("[PacketEvents] Attempted to initialize a channel twice!");
+            } else {
+                channel.pipeline().addBefore("packet_handler", handlerName, channelHandler);
+            }
+        }
+    }
+
+    private void load() {
+        initChannelMethod = Reflection.getMethod(oldChannelInitializer.getClass(), "initChannel", 0);
+    }
+
+    public ChannelInitializer<?> getOldChannelInitializer() {
+        return oldChannelInitializer;
+    }
+
+    @Override
+    protected void initChannel(Channel channel) throws Exception {
+        initChannelMethod.invoke(oldChannelInitializer, channel);
+        postInitChannel(channel);
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/modern/early/PaperChannelInjector.java

@@ -0,0 +1,67 @@
+/*
+ * This file is part of ViaVersion - https://github.com/ViaVersion/ViaVersion
+ * Copyright (C) 2016-2021 ViaVersion and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.modern.early;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.netty.channel.Channel;
+import net.kyori.adventure.key.Key;
+
+import java.lang.reflect.Method;
+import java.lang.reflect.Proxy;
+
+public class PaperChannelInjector {
+    public static final boolean PAPER_INJECTION_METHOD = hasPaperInjectionMethod();
+
+    private PaperChannelInjector() {
+    }
+
+    public static void setPaperChannelInitializeListener() throws ReflectiveOperationException {
+        // Call io.papermc.paper.network.ChannelInitializeListenerHolder.addListener(net.kyori.adventure.key.Key, io.papermc.paper.network.ChannelInitializeListener)
+        // Create an interface proxy of ChannelInitializeListener
+        Class<?> listenerClass = Class.forName("io.papermc.paper.network.ChannelInitializeListener");
+        Object channelInitializeListener = Proxy.newProxyInstance(EarlyChannelInjectorModern.class.getClassLoader(), new Class[]{listenerClass}, (proxy, method, args) -> {
+            if (method.getName().equals("afterInitChannel")) {
+                PEChannelInitializerModern.postInitChannel((Channel) args[0]);
+                return null;
+            }
+            return method.invoke(proxy, args);
+        });
+
+        Class<?> holderClass = Class.forName("io.papermc.paper.network.ChannelInitializeListenerHolder");
+        Method addListenerMethod = holderClass.getDeclaredMethod("addListener", Key.class, listenerClass);
+        Key key = Key.key(PacketEvents.get().getHandlerName().toLowerCase(), "injector");
+        addListenerMethod.invoke(null, key, channelInitializeListener);
+    }
+
+    public static void removePaperChannelInitializeListener() throws ReflectiveOperationException {
+        Class<?> holderClass = Class.forName("io.papermc.paper.network.ChannelInitializeListenerHolder");
+        Method addListenerMethod = holderClass.getDeclaredMethod("removeListener", Key.class);
+        Key key = Key.key(PacketEvents.get().getHandlerName().toLowerCase(), "injector");
+        addListenerMethod.invoke(null, key);
+    }
+
+    private static boolean hasPaperInjectionMethod() {
+        try {
+            Class.forName("io.papermc.paper.network.ChannelInitializeListener");
+            return true;
+        } catch (ReflectiveOperationException e) {
+            return false;
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/injector/modern/late/LateChannelInjectorModern.java

@@ -0,0 +1,70 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.injector.modern.late;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.injector.LateInjector;
+import io.github.retrooper.packetevents.injector.modern.PlayerChannelHandlerModern;
+import io.netty.channel.Channel;
+import org.bukkit.entity.Player;
+
+public class LateChannelInjectorModern implements LateInjector {
+    @Override
+    public void inject() {
+
+    }
+
+    @Override
+    public void eject() {
+
+    }
+
+    @Override
+    public void injectPlayer(Player player) {
+        PlayerChannelHandlerModern playerChannelHandlerModern = new PlayerChannelHandlerModern();
+        playerChannelHandlerModern.player = player;
+        Channel channel = (Channel) PacketEvents.get().getPlayerUtils().getChannel(player);
+        channel.pipeline().addBefore("packet_handler", PacketEvents.get().getHandlerName(), playerChannelHandlerModern);
+    }
+
+    @Override
+    public void ejectPlayer(Player player) {
+        Object channel = PacketEvents.get().getPlayerUtils().getChannel(player);
+        if (channel != null) {
+            Channel chnl = (Channel) channel;
+            try {
+                chnl.pipeline().remove(PacketEvents.get().getHandlerName());
+            } catch (Exception ex) {
+
+            }
+        }
+    }
+
+    @Override
+    public boolean hasInjected(Player player) {
+        Channel channel = (Channel) PacketEvents.get().getPlayerUtils().getChannel(player);
+        return channel.pipeline().get(PacketEvents.get().getHandlerName()) != null;
+    }
+
+    @Override
+    public void sendPacket(Object rawChannel, Object packet) {
+        Channel channel = (Channel) rawChannel;
+        channel.pipeline().writeAndFlush(packet);
+    }
+}

src/main/java/io/github/retrooper/packetevents/mojang/GameProfile.java

@@ -1,82 +0,0 @@
-package io.github.retrooper.packetevents.mojang;
-
-import com.mojang.authlib.properties.PropertyMap;
-import org.bukkit.craftbukkit.libs.org.apache.commons.lang3.StringUtils;
-import org.bukkit.craftbukkit.libs.org.apache.commons.lang3.builder.ToStringBuilder;
-
-import java.util.UUID;
-
-public class GameProfile {
-    private final UUID id;
-    private final String name;
-    private final PropertyMap properties = new PropertyMap();
-    private boolean legacy;
-
-    public GameProfile(UUID id, String name) {
-        if (id == null && StringUtils.isBlank(name)) {
-            throw new IllegalArgumentException("Name and ID cannot both be blank");
-        } else {
-            this.id = id;
-            this.name = name;
-        }
-    }
-
-    public UUID getId() {
-        return this.id;
-    }
-
-    public String getName() {
-        return this.name;
-    }
-
-    public PropertyMap getProperties() {
-        return this.properties;
-    }
-
-    public boolean isComplete() {
-        return this.id != null && StringUtils.isNotBlank(this.getName());
-    }
-
-    public boolean equalsMojangGameProfile(com.mojang.authlib.GameProfile profile) {
-        if (profile != null) {
-            return profile.getId() != null && getId() != null && profile.getId() == getId()
-                    && profile.getName() != null && getName() != null && profile.getName().equals(getName());
-        }
-        return false;
-    }
-
-    public boolean equals(Object o) {
-        if (this == o) {
-            return true;
-        } else if (o != null && this.getClass() == o.getClass()) {
-            GameProfile that = (GameProfile) o;
-            if (this.id != null) {
-                if (!this.id.equals(that.id)) {
-                    return false;
-                }
-            } else if (that.id != null) {
-                return false;
-            }
-
-            if (this.name != null) {
-                return this.name.equals(that.name);
-            } else return that.name == null;
-        } else {
-            return false;
-        }
-    }
-
-    public int hashCode() {
-        int result = this.id != null ? this.id.hashCode() : 0;
-        result = 31 * result + (this.name != null ? this.name.hashCode() : 0);
-        return result;
-    }
-
-    public String toString() {
-        return (new ToStringBuilder(this)).append("id", this.id).append("name", this.name).append("properties", this.properties).append("legacy", this.legacy).toString();
-    }
-
-    public boolean isLegacy() {
-        return this.legacy;
-    }
-}

src/main/java/io/github/retrooper/packetevents/packet/Packet.java

@@ -1,137 +0,0 @@
-package io.github.retrooper.packetevents.packet;
-
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-
-@Deprecated
-public final class Packet {
-
-    private static Class<?> packetPlayInFlying, packetPlayInPosition, packetPlayInPositionLook, packetPlayInLook;
-
-    static {
-        try {
-            packetPlayInFlying = NMSUtils.getNMSClass(Client.FLYING);
-        } catch (ClassNotFoundException e) {
-            //That is fine, they are on 1.9+
-        }
-        try {
-            packetPlayInPosition = NMSUtils.getNMSClass(Client.POSITION);
-            packetPlayInPositionLook = NMSUtils.getNMSClass(Client.POSITION_LOOK);
-            packetPlayInLook = NMSUtils.getNMSClass(Client.LOOK);
-        } catch (ClassNotFoundException e) {
-            e.printStackTrace();
-        }
-    }
-
-    /**
-     * Is this NMS packet an instanceof the "PacketPlayInFlying" packet in the 1.8 protocol?
-     * Supports 1.9->1.15.2 too!
-     *
-     * @param nmsPacket
-     * @return If the nms packet provided is an instanceof the "PacketPlayInFlying" packet in the 1.8 protocol!
-     */
-    public static boolean isInstanceOfFlyingPacket(Object nmsPacket) {
-        //1.7->1.8.8
-        if (packetPlayInFlying != null) {
-            return packetPlayInFlying.isInstance(nmsPacket);
-        } else {
-            //1.9->1.15.2
-            return packetPlayInPosition.isInstance(nmsPacket)
-                    || packetPlayInPositionLook.isInstance(nmsPacket)
-                    || packetPlayInLook.isInstance(nmsPacket);
-        }
-    }
-
-    /**
-     * Is this NMS Packet an instanceof the "PacketPlayInPosition" or "PacketPlayInPositionLook"
-     * @param nmsPacket
-     * @return
-     */
-    public static boolean isInstanceOfPositionOrPositionLook(final Object nmsPacket) {
-        return packetPlayInPosition.isInstance(nmsPacket) || packetPlayInPositionLook.isInstance(nmsPacket);
-    }
-
-    public static boolean isInstanceOfLook(final Object nmsPacket) {
-        return packetPlayInLook.isInstance(nmsPacket);
-    }
-
-
-    public static class Client {
-        private static final String c = "PacketPlayIn";
-
-        @Deprecated
-        public static final String FLYING = c + "Flying";
-
-
-        public static final String POSITION = c + "Position";
-
-        public static final String POSITION_LOOK = c + "PositionLook";
-
-        public static final String LOOK = c + "Look";
-        public static final String CLIENT_COMMAND = c + "ClientCommand";
-
-        public static final String TRANSACTION = c + "Transaction";
-        public static final String BLOCK_DIG = c + "BlockDig";
-        public static final String ENTITY_ACTION = c + "EntityAction";
-        public static final String USE_ENTITY = c + "UseEntity";
-        public static final String WINDOW_CLICK = c + "WindowClick";
-        public static final String STEER_VEHICLE = c + "SteerVehicle";
-        public static final String CUSTOM_PAYLOAD = c + "CustomPayload";
-        public static final String ARM_ANIMATION = c + "ArmAnimation";
-        /**
-         * The packet name of the block place depending on your server version, "PacketPlayInBlockPlace" or "PacketPlayInUseItem"
-         */
-        public static final String BLOCK_PLACE = c + ((ServerVersion.getVersion().isHigherThan(ServerVersion.v_1_8_8)) ? "UseItem" : "BlockPlace");
-
-        public static final String ABILITIES = c + "Abilities";
-        public static final String HELD_ITEM_SLOT = c + "HeldItemSlot";
-        public static final String CLOSE_WINDOW = c + "CloseWindow";
-        public static final String TAB_COMPLETE = c + "TabComplete";
-        public static final String CHAT = c + "Chat";
-        public static final String SET_CREATIVE_SLOT = c + "SetCreativeSlot";
-
-        public static final String KEEP_ALIVE = c + "KeepAlive";
-
-    }
-
-    public static class Server {
-        private static final String s = "PacketPlayOut";
-
-        public static final String ANIMATION = s + "Animation";
-        public static final String KEEP_ALIVE = s + "KeepAlive";
-        public static final String CHAT = s + "Chat";
-        public static final String POSITION = s + "Position";
-        public static final String TRANSACTION = s + "Transaction";
-        public static final String NAMED_ENTITY_SPAWN = s + "NamedEntitySpawn";
-        public static final String SPAWN_ENTITY_LIVING = s + "SpawnEntityLiving";
-        public static final String SPAWN_ENTITY = s + "SpawnEntity";
-        public static final String CUSTOM_PAYLOAD = s + "CustomPayload";
-        public static final String ABILITIES = s + "Abilities";
-        public static final String ENTITY_METADATA = s + "EntityMetadata";
-        public static final String ENTITY_VELOCITY = s + "EntityVelocity";
-        public static final String ENTITY_DESTROY = s + "EntityDestroy";
-        public static final String ENTITY_HEAD_ROTATION = s + "EntityHeadRotation";
-        public static final String BLOCK_CHANGE = s + "BlockChange";
-        public static final String CLOSE_WINDOW = s + "CloseWindow";
-        public static final String HELD_ITEM_SLOT = s + "HeldItemSlot";
-        public static final String TAB_COMPLETE = s + "TabComplete";
-        public static final String RESPAWN = s + "Respawn";
-        public static final String WORLD_PARTICLES = s + "WorldParticles";
-        public static final String COMMANDS = s + "Commands";
-        public static final String OPEN_WINDOW = s + "OpenWindow";
-        public static final String LOGIN = s + "Login";
-        public static final String SERVER_DIFFICULTY = s + "ServerDifficulty";
-    }
-
-    public static class Login {
-        public static final String HANDSHAKE = "PacketHandshakingInSetProtocol";
-        public static final String PING = "PacketStatusInPing";
-        public static final String START = "PacketStatusInStart";
-        public static final String SUCCESS = "PacketLoginOutSuccess";
-        public static final String ENCRYPTION_BEGIN_IN = "PacketLoginInEncryptionBegin";
-        public static final String ENCRYPTION_BEGIN_OUT = "PacketLoginOutEncryptionBegin";
-
-        public static final String[] LOGIN_PACKETS = new String[]{"PacketHandshakingInSetProtocol", "PacketLoginInStart", "PacketLoginInEncryptionBegin"};
-    }
-
-}

src/main/java/io/github/retrooper/packetevents/packet/PacketType.java

@@ -1,166 +0,0 @@
-package io.github.retrooper.packetevents.packet;
-
-import io.github.retrooper.packetevents.enums.ServerVersion;
-import io.github.retrooper.packetevents.utils.NMSUtils;
-
-public final class PacketType {
-
-
-    public static final class Util {
-        /**
-         * Is this NMS packet an instance of the "PacketPlayInFlying" packet?
-         * Supports 1.9->1.15.2 too!
-         *
-         * @param nmsPacket
-         * @return If the nms packet provided is an instanceof the "PacketPlayInFlying" packet in the 1.8 protocol!
-         */
-        public static boolean isInstanceOfFlyingPacket(final Object nmsPacket) {
-            //1.7->1.8.8
-            if (packetPlayInFlying != null) {
-                return packetPlayInFlying.isInstance(nmsPacket);
-            } else {
-                //1.9->1.15.2
-                return isInstanceOfPositionOrPositionLook(nmsPacket) || isInstanceOfPositionLookPacket(nmsPacket);
-            }
-        }
-
-        /**
-         * Is this NMS packet an instance of the "PacketPlayInPosition" packet?
-         *
-         * @param nmsPacket
-         * @return nmsPacket instanceof PacketPlayInPosition
-         */
-        public static boolean isInstanceOfPositionPacket(final Object nmsPacket) {
-            return packetPlayInPosition.isInstance(nmsPacket);
-        }
-
-        /**
-         * Is this NMS packet an instance of the "PacketPlayInPositionLook" packet?
-         *
-         * @param nmsPacket
-         * @return nmsPacket instanceof PacketPlayInPositionLook
-         */
-        public static boolean isInstanceOfPositionLookPacket(final Object nmsPacket) {
-            return packetPlayInPositionLook.isInstance(nmsPacket);
-        }
-
-        /**
-         * Is this NMS Packet an instanceof the "PacketPlayInPosition" or "PacketPlayInPositionLook"
-         *
-         * @param nmsPacket
-         * @return nmsPacket instanceof PacketPlayInPosition || nmsPacket instanceof PacketPlayInPositionLook
-         */
-        public static boolean isInstanceOfPositionOrPositionLook(final Object nmsPacket) {
-            return isInstanceOfPositionPacket(nmsPacket) || isInstanceOfPositionLookPacket(nmsPacket);
-        }
-
-        /**
-         * Is this NMS Packet an instance of the "PacketPlayInLook" packet?
-         *
-         * @param nmsPacket
-         * @return nmsPacket instanceof PacketPlayInLook
-         */
-        public static boolean isInstanceOfLook(final Object nmsPacket) {
-            return packetPlayInLook.isInstance(nmsPacket);
-        }
-
-        public static boolean isInstanceOfUseEntity(final Object nmsPacket) {
-            return packetPlayInUseEntity.isInstance(nmsPacket);
-        }
-
-        private static Class<?> packetPlayInFlying, packetPlayInPosition, packetPlayInPositionLook, packetPlayInLook, packetPlayInUseEntity;
-
-        static {
-            try {
-                packetPlayInFlying = NMSUtils.getNMSClass(Client.FLYING);
-            } catch (ClassNotFoundException e) {
-                //That is fine, they are on 1.9+
-            }
-            try {
-                packetPlayInPosition = NMSUtils.getNMSClass(Client.POSITION);
-                packetPlayInPositionLook = NMSUtils.getNMSClass(Client.POSITION_LOOK);
-                packetPlayInLook = NMSUtils.getNMSClass(Client.LOOK);
-                packetPlayInUseEntity = NMSUtils.getNMSClass(Client.USE_ENTITY);
-            } catch (ClassNotFoundException e) {
-                e.printStackTrace();
-            }
-        }
-    }
-
-    public static final class Client {
-        private static final String c = "PacketPlayIn";
-
-        @Deprecated
-        public static final String FLYING = c + "Flying";
-
-
-        public static final String POSITION = c + "Position";
-
-        public static final String POSITION_LOOK = c + "PositionLook";
-
-        public static final String LOOK = c + "Look";
-        public static final String CLIENT_COMMAND = c + "ClientCommand";
-
-        public static final String TRANSACTION = c + "Transaction";
-        public static final String BLOCK_DIG = c + "BlockDig";
-        public static final String ENTITY_ACTION = c + "EntityAction";
-        public static final String USE_ENTITY = c + "UseEntity";
-        public static final String WINDOW_CLICK = c + "WindowClick";
-        public static final String STEER_VEHICLE = c + "SteerVehicle";
-        public static final String CUSTOM_PAYLOAD = c + "CustomPayload";
-        public static final String ARM_ANIMATION = c + "ArmAnimation";
-        /**
-         * The packet name of the block place depending on your server version, "PacketPlayInBlockPlace" or "PacketPlayInUseItem"
-         */
-        public static final String BLOCK_PLACE = c + ((ServerVersion.getVersion().isHigherThan(ServerVersion.v_1_8_8)) ? "UseItem" : "BlockPlace");
-
-        public static final String ABILITIES = c + "Abilities";
-        public static final String HELD_ITEM_SLOT = c + "HeldItemSlot";
-        public static final String CLOSE_WINDOW = c + "CloseWindow";
-        public static final String TAB_COMPLETE = c + "TabComplete";
-        public static final String CHAT = c + "Chat";
-        public static final String SET_CREATIVE_SLOT = c + "SetCreativeSlot";
-
-        public static final String KEEP_ALIVE = c + "KeepAlive";
-
-    }
-
-    public static final class Server {
-        private static final String s = "PacketPlayOut";
-
-        public static final String ANIMATION = s + "Animation";
-        public static final String KEEP_ALIVE = s + "KeepAlive";
-        public static final String CHAT = s + "Chat";
-        public static final String POSITION = s + "Position";
-        public static final String TRANSACTION = s + "Transaction";
-        public static final String NAMED_ENTITY_SPAWN = s + "NamedEntitySpawn";
-        public static final String SPAWN_ENTITY_LIVING = s + "SpawnEntityLiving";
-        public static final String SPAWN_ENTITY = s + "SpawnEntity";
-        public static final String CUSTOM_PAYLOAD = s + "CustomPayload";
-        public static final String ABILITIES = s + "Abilities";
-        public static final String ENTITY_METADATA = s + "EntityMetadata";
-        public static final String ENTITY_VELOCITY = s + "EntityVelocity";
-        public static final String ENTITY_DESTROY = s + "EntityDestroy";
-        public static final String ENTITY_HEAD_ROTATION = s + "EntityHeadRotation";
-        public static final String BLOCK_CHANGE = s + "BlockChange";
-        public static final String CLOSE_WINDOW = s + "CloseWindow";
-        public static final String HELD_ITEM_SLOT = s + "HeldItemSlot";
-        public static final String TAB_COMPLETE = s + "TabComplete";
-        public static final String RESPAWN = s + "Respawn";
-        public static final String WORLD_PARTICLES = s + "WorldParticles";
-        public static final String COMMANDS = s + "Commands";
-        public static final String OPEN_WINDOW = s + "OpenWindow";
-        public static final String LOGIN = s + "Login";
-        public static final String SERVER_DIFFICULTY = s + "ServerDifficulty";
-    }
-
-    public static final class Login {
-        public static final String HANDSHAKE = "PacketHandshakingInSetProtocol";
-        public static final String PING = "PacketStatusInPing";
-        public static final String START = "PacketStatusInStart";
-        public static final String SUCCESS = "PacketLoginOutSuccess";
-        public static final String ENCRYPTION_BEGIN_IN = "PacketLoginInEncryptionBegin";
-        public static final String ENCRYPTION_BEGIN_OUT = "PacketLoginOutEncryptionBegin";
-    }
-
-}

src/main/java/io/github/retrooper/packetevents/packettype/PacketState.java

@@ -0,0 +1,27 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.packettype;
+
+/**
+ * @author retrooper
+ * @since 1.8
+ */
+public enum PacketState {
+    STATUS, HANDSHAKING, LOGIN, PLAY
+}

src/main/java/io/github/retrooper/packetevents/packettype/PacketType.java

@@ -0,0 +1,469 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.packettype;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+
+import java.util.IdentityHashMap;
+import java.util.Map;
+
+/**
+ * Packet Type IDs.
+ * This is the Packet ID system, it is recommended to use this over packet comparisons by packet name.
+ * This is also faster than comparing packet names.
+ *
+ * @author retrooper
+ * @since 1.6.8
+ */
+public class PacketType {
+    /**
+     * If a Packet Type could not be resolved, it will be set to the current value of this constant.
+     * This value may change over the versions so it is important to use the variable and not hard code its value.
+     */
+    public static final byte INVALID = -128;
+    public static final Map<Class<?>, Byte> packetIDMap = new IdentityHashMap<>();
+
+    private static void insertPacketID(Class<?> cls, byte packetID) {
+        if (cls != null) {
+            packetIDMap.put(cls, packetID);
+        }
+    }
+
+    public static void load() {
+        Status.Client.load();
+        Status.Server.load();
+
+        Handshaking.Client.load();
+
+        Login.Client.load();
+        Login.Server.load();
+
+        Play.Client.load();
+        Play.Server.load();
+    }
+
+    /**
+     * Status Packet IDs.
+     *
+     * @author retrooper
+     * @see <a href="https://wiki.vg/Protocol#Status">https://wiki.vg/Protocol#Status</a>
+     * @since 1.7
+     */
+    public static class Status {
+        /**
+         * Server-bound (client-sided) Status Packet IDs.
+         *
+         * @author retrooper
+         * @see <a href="https://wiki.vg/Protocol#Serverbound_2">https://wiki.vg/Protocol#Serverbound_2</a>
+         * @since 1.8
+         */
+        public static class Client {
+            public static final byte START = -127, PING = -126;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Status.Client.START, Client.START);
+                insertPacketID(PacketTypeClasses.Status.Client.PING, Client.PING);
+            }
+        }
+
+        /**
+         * Client-bound (server-sided) Status Packet IDs.
+         *
+         * @author retrooper
+         * @see <a href="https://wiki.vg/Protocol#Clientbound_2">https://wiki.vg/Protocol#Clientbound_2</a>
+         * @since 1.8
+         */
+        public static class Server {
+            public static final byte PONG = -125, SERVER_INFO = -124;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Status.Server.PONG, Server.PONG);
+                insertPacketID(PacketTypeClasses.Status.Server.SERVER_INFO, Server.SERVER_INFO);
+            }
+        }
+    }
+
+    /**
+     * Handshaking Packet IDs.
+     *
+     * @author retrooper
+     * @see <a href="https://wiki.vg/Protocol#Handshaking">https://wiki.vg/Protocol#Handshaking</a>
+     * @since 1.8
+     */
+    public static class Handshaking {
+        /**
+         * Server-bound (client-sided) Handshaking Packet IDs.
+         *
+         * @author retrooper
+         * @since 1.8
+         */
+        public static class Client {
+            public static final byte SET_PROTOCOL = -123;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Handshaking.Client.SET_PROTOCOL, Client.SET_PROTOCOL);
+            }
+        }
+    }
+
+    /**
+     * Login Packet IDs.
+     *
+     * @author retrooper
+     * @see <a href="https://wiki.vg/Protocol#Login">https://wiki.vg/Protocol#Login</a>
+     * @since 1.7
+     */
+    public static class Login {
+        /**
+         * Server-bound (client-sided) Login Packet IDs.
+         *
+         * @author retrooper
+         * @see <a href="https://wiki.vg/Protocol#Serverbound_3">https://wiki.vg/Protocol#Serverbound_3</a>
+         * @since 1.8
+         */
+        public static class Client {
+            public static final byte CUSTOM_PAYLOAD = -122, START = -121, ENCRYPTION_BEGIN = -120;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Login.Client.CUSTOM_PAYLOAD, Client.CUSTOM_PAYLOAD);
+                insertPacketID(PacketTypeClasses.Login.Client.START, Client.START);
+                insertPacketID(PacketTypeClasses.Login.Client.ENCRYPTION_BEGIN, Client.ENCRYPTION_BEGIN);
+            }
+        }
+
+        /**
+         * Client-bound (server-sided) Login Packet IDs.
+         *
+         * @author retrooper
+         * @see <a href="https://wiki.vg/Protocol#Clientbound_3">https://wiki.vg/Protocol#Clientbound_3</a>
+         * @since 1.8
+         */
+        public static class Server {
+            public static final byte CUSTOM_PAYLOAD = -119, DISCONNECT = -118, ENCRYPTION_BEGIN = -117, SUCCESS = -116, SET_COMPRESSION = -115;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Login.Server.CUSTOM_PAYLOAD, Server.CUSTOM_PAYLOAD);
+                insertPacketID(PacketTypeClasses.Login.Server.DISCONNECT, Server.DISCONNECT);
+                insertPacketID(PacketTypeClasses.Login.Server.ENCRYPTION_BEGIN, Server.ENCRYPTION_BEGIN);
+                insertPacketID(PacketTypeClasses.Login.Server.SUCCESS, Server.SUCCESS);
+                insertPacketID(PacketTypeClasses.Login.Server.SET_COMPRESSION, Server.SET_COMPRESSION);
+            }
+        }
+    }
+
+    /**
+     * Play Packet IDs.
+     *
+     * @author retrooper
+     * @see <a href="https://wiki.vg/Protocol#Play">https://wiki.vg/Protocol#Play</a>
+     * @since 1.8
+     */
+    public static class Play {
+        /**
+         * Server-bound (client-sided) Play Packet IDs.
+         *
+         * @author retrooper
+         * @see <a href="https://wiki.vg/Protocol#Serverbound_4">https://wiki.vg/Protocol#Serverbound_4</a>
+         * @since 1.8
+         */
+        public static class Client {
+            public static final byte TELEPORT_ACCEPT = -114,
+                    TILE_NBT_QUERY = -113, DIFFICULTY_CHANGE = -112, CHAT = -111, CLIENT_COMMAND = -110,
+                    SETTINGS = -109, TAB_COMPLETE = -108, TRANSACTION = -107, ENCHANT_ITEM = -106,
+                    WINDOW_CLICK = -105, CLOSE_WINDOW = -104, CUSTOM_PAYLOAD = -103, B_EDIT = -102,
+                    ENTITY_NBT_QUERY = -101, USE_ENTITY = -100, JIGSAW_GENERATE = -99, KEEP_ALIVE = -98,
+                    DIFFICULTY_LOCK = -97, POSITION = -96, POSITION_LOOK = -95, LOOK = -94,
+                    FLYING = -93, VEHICLE_MOVE = -92, BOAT_MOVE = -91, PICK_ITEM = -90,
+                    AUTO_RECIPE = -89, ABILITIES = -88, BLOCK_DIG = -87, ENTITY_ACTION = -86,
+                    STEER_VEHICLE = -85, RECIPE_DISPLAYED = -84, ITEM_NAME = -83, RESOURCE_PACK_STATUS = -82,
+                    ADVANCEMENTS = -81, TR_SEL = -80, BEACON = -79, HELD_ITEM_SLOT = -78,
+                    SET_COMMAND_BLOCK = -77, SET_COMMAND_MINECART = -76, SET_CREATIVE_SLOT = -75, SET_JIGSAW = -74,
+                    STRUCT = -73, UPDATE_SIGN = -72, ARM_ANIMATION = -71, SPECTATE = -70,
+                    USE_ITEM = -69, BLOCK_PLACE = -68, PONG = 28;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Play.Client.TELEPORT_ACCEPT, TELEPORT_ACCEPT);
+                insertPacketID(PacketTypeClasses.Play.Client.TILE_NBT_QUERY, TILE_NBT_QUERY);
+                insertPacketID(PacketTypeClasses.Play.Client.DIFFICULTY_CHANGE, DIFFICULTY_CHANGE);
+                insertPacketID(PacketTypeClasses.Play.Client.CHAT, CHAT);
+                insertPacketID(PacketTypeClasses.Play.Client.CLIENT_COMMAND, CLIENT_COMMAND);
+                insertPacketID(PacketTypeClasses.Play.Client.SETTINGS, SETTINGS);
+                insertPacketID(PacketTypeClasses.Play.Client.TAB_COMPLETE, TAB_COMPLETE);
+                insertPacketID(PacketTypeClasses.Play.Client.TRANSACTION, TRANSACTION);
+                insertPacketID(PacketTypeClasses.Play.Client.ENCHANT_ITEM, ENCHANT_ITEM);
+                insertPacketID(PacketTypeClasses.Play.Client.WINDOW_CLICK, WINDOW_CLICK);
+                insertPacketID(PacketTypeClasses.Play.Client.CLOSE_WINDOW, CLOSE_WINDOW);
+                insertPacketID(PacketTypeClasses.Play.Client.CUSTOM_PAYLOAD, CUSTOM_PAYLOAD);
+                insertPacketID(PacketTypeClasses.Play.Client.B_EDIT, B_EDIT);
+                insertPacketID(PacketTypeClasses.Play.Client.ENTITY_NBT_QUERY, ENTITY_NBT_QUERY);
+                insertPacketID(PacketTypeClasses.Play.Client.USE_ENTITY, USE_ENTITY);
+                insertPacketID(PacketTypeClasses.Play.Client.JIGSAW_GENERATE, JIGSAW_GENERATE);
+                insertPacketID(PacketTypeClasses.Play.Client.KEEP_ALIVE, KEEP_ALIVE);
+                insertPacketID(PacketTypeClasses.Play.Client.DIFFICULTY_LOCK, DIFFICULTY_LOCK);
+                insertPacketID(PacketTypeClasses.Play.Client.POSITION, POSITION);
+                insertPacketID(PacketTypeClasses.Play.Client.POSITION_LOOK, POSITION_LOOK);
+                insertPacketID(PacketTypeClasses.Play.Client.LOOK, LOOK);
+                insertPacketID(PacketTypeClasses.Play.Client.FLYING, FLYING);
+                insertPacketID(PacketTypeClasses.Play.Client.VEHICLE_MOVE, VEHICLE_MOVE);
+                insertPacketID(PacketTypeClasses.Play.Client.BOAT_MOVE, BOAT_MOVE);
+                insertPacketID(PacketTypeClasses.Play.Client.PICK_ITEM, PICK_ITEM);
+                insertPacketID(PacketTypeClasses.Play.Client.AUTO_RECIPE, AUTO_RECIPE);
+                insertPacketID(PacketTypeClasses.Play.Client.ABILITIES, ABILITIES);
+                insertPacketID(PacketTypeClasses.Play.Client.BLOCK_DIG, BLOCK_DIG);
+                insertPacketID(PacketTypeClasses.Play.Client.ENTITY_ACTION, ENTITY_ACTION);
+                insertPacketID(PacketTypeClasses.Play.Client.STEER_VEHICLE, STEER_VEHICLE);
+                insertPacketID(PacketTypeClasses.Play.Client.RECIPE_DISPLAYED, RECIPE_DISPLAYED);
+                insertPacketID(PacketTypeClasses.Play.Client.ITEM_NAME, ITEM_NAME);
+                insertPacketID(PacketTypeClasses.Play.Client.RESOURCE_PACK_STATUS, RESOURCE_PACK_STATUS);
+                insertPacketID(PacketTypeClasses.Play.Client.ADVANCEMENTS, ADVANCEMENTS);
+                insertPacketID(PacketTypeClasses.Play.Client.TR_SEL, TR_SEL);
+                insertPacketID(PacketTypeClasses.Play.Client.BEACON, BEACON);
+                insertPacketID(PacketTypeClasses.Play.Client.HELD_ITEM_SLOT, HELD_ITEM_SLOT);
+                insertPacketID(PacketTypeClasses.Play.Client.SET_COMMAND_BLOCK, SET_COMMAND_BLOCK);
+                insertPacketID(PacketTypeClasses.Play.Client.SET_COMMAND_MINECART, SET_COMMAND_MINECART);
+                insertPacketID(PacketTypeClasses.Play.Client.SET_CREATIVE_SLOT, SET_CREATIVE_SLOT);
+                insertPacketID(PacketTypeClasses.Play.Client.SET_JIGSAW, SET_JIGSAW);
+                insertPacketID(PacketTypeClasses.Play.Client.STRUCT, STRUCT);
+                insertPacketID(PacketTypeClasses.Play.Client.UPDATE_SIGN, UPDATE_SIGN);
+                insertPacketID(PacketTypeClasses.Play.Client.ARM_ANIMATION, ARM_ANIMATION);
+                insertPacketID(PacketTypeClasses.Play.Client.SPECTATE, SPECTATE);
+                insertPacketID(PacketTypeClasses.Play.Client.USE_ITEM, USE_ITEM);
+                insertPacketID(PacketTypeClasses.Play.Client.BLOCK_PLACE, BLOCK_PLACE);
+                insertPacketID(PacketTypeClasses.Play.Client.PONG, PONG);
+            }
+
+            /**
+             * Server-bound Play Packet Type utility.
+             * Save a few lines of code by using this.
+             *
+             * @author retrooper
+             * @since 1.8
+             */
+            public static class Util {
+                /**
+                 * Is the play packet a PacketPlayInFlying, PacketPlayInPosition, PacketPlayInPositionLook
+                 * or a PacketPlayInLook packet?
+                 *
+                 * @param packetID Play Packet ID.
+                 * @return Is the Packet ID an instance of the PacketPlayInFlying packet?
+                 */
+                public static boolean isInstanceOfFlying(final byte packetID) {
+                    return packetID == FLYING
+                            || packetID == POSITION
+                            || packetID == POSITION_LOOK
+                            || packetID == LOOK;
+                }
+
+                /**
+                 * Is this the packet where the client places a block?
+                 * On 1.7.10 - 1.8.8 the client sends a PacketPlayInBlockPlace packet when actually placing the block.
+                 * On 1.9 - now the client sends a PacketPlayInUseItem packet when placing the block and the
+                 * PacketPlayInBlockPlace has a different use.
+                 * This method is a nice utility supporting all these versions letting you know
+                 * if the client played a block.
+                 * The {@link io.github.retrooper.packetevents.packetwrappers.play.in.blockplace.WrappedPacketInBlockPlace} wrapper
+                 * only works on an actual block place.
+                 * Use this method before using the wrapper to support all minecraft versions.
+                 *
+                 * @param packetID Play Packet ID.
+                 * @return Has the client placed a block?
+                 */
+                public static boolean isBlockPlace(final byte packetID) {
+                    final ServerVersion version = PacketEvents.get().getServerUtils().getVersion();
+                    return version.isNewerThan(ServerVersion.v_1_8_8) ?
+                            packetID == PacketType.Play.Client.USE_ITEM
+                            : packetID == PacketType.Play.Client.BLOCK_PLACE;
+                }
+            }
+        }
+
+        /**
+         * Client-bound (server-sided) Play Packet IDs.
+         *
+         * @author retrooper
+         * @see <a href="https://wiki.vg/Protocol#Clientbound_4">https://wiki.vg/Protocol#Clientbound_4</a>
+         * @since 1.8
+         */
+        public static class Server {
+            public static final byte SPAWN_ENTITY = -67, SPAWN_ENTITY_EXPERIENCE_ORB = -66, SPAWN_ENTITY_WEATHER = -65, SPAWN_ENTITY_LIVING = -64,
+                    SPAWN_ENTITY_PAINTING = -63, SPAWN_ENTITY_SPAWN = -62, ANIMATION = -61, STATISTIC = -60,
+                    BLOCK_BREAK = -59, BLOCK_BREAK_ANIMATION = -58, TILE_ENTITY_DATA = -57, BLOCK_ACTION = -56,
+                    BLOCK_CHANGE = -55, BOSS = -54, SERVER_DIFFICULTY = -53, CHAT = -52, MULTI_BLOCK_CHANGE = -51,
+                    TAB_COMPLETE = -50, COMMANDS = -49, TRANSACTION = -48, CLOSE_WINDOW = -47,
+                    WINDOW_ITEMS = -46, WINDOW_DATA = -45, SET_SLOT = -44, SET_COOLDOWN = -43,
+                    CUSTOM_PAYLOAD = -42, CUSTOM_SOUND_EFFECT = -41, KICK_DISCONNECT = -40, ENTITY_STATUS = -39,
+                    EXPLOSION = -38, UNLOAD_CHUNK = -37, GAME_STATE_CHANGE = -36, OPEN_WINDOW_HORSE = -35,
+                    KEEP_ALIVE = -34, MAP_CHUNK = -33, WORLD_EVENT = -32, WORLD_PARTICLES = -31,
+                    LIGHT_UPDATE = -30, LOGIN = -29, MAP = -28, OPEN_WINDOW_MERCHANT = -27,
+                    REL_ENTITY_MOVE = -26, REL_ENTITY_MOVE_LOOK = -25, ENTITY_LOOK = -24, ENTITY = -23,
+                    VEHICLE_MOVE = -22, OPEN_BOOK = -21, OPEN_WINDOW = -20, OPEN_SIGN_EDITOR = -19,
+                    AUTO_RECIPE = -18, ABILITIES = -17, COMBAT_EVENT = -16, PLAYER_INFO = -15,
+                    LOOK_AT = -14, POSITION = -13, RECIPES = -12, ENTITY_DESTROY = -11,
+                    REMOVE_ENTITY_EFFECT = -10, RESOURCE_PACK_SEND = -9, RESPAWN = -8, ENTITY_HEAD_ROTATION = -7,
+                    SELECT_ADVANCEMENT_TAB = -6, WORLD_BORDER = -5, CAMERA = -4, HELD_ITEM_SLOT = -3,
+                    VIEW_CENTRE = -2, VIEW_DISTANCE = -1, SCOREBOARD_DISPLAY_OBJECTIVE = 0, ENTITY_METADATA = 1,
+                    ATTACH_ENTITY = 2, ENTITY_VELOCITY = 3, ENTITY_EQUIPMENT = 4, EXPERIENCE = 5,
+                    UPDATE_HEALTH = 6, SCOREBOARD_OBJECTIVE = 7, MOUNT = 8, SCOREBOARD_TEAM = 9,
+                    SCOREBOARD_SCORE = 10, SPAWN_POSITION = 11, UPDATE_TIME = 12, TITLE = 13,
+                    ENTITY_SOUND = 14, NAMED_SOUND_EFFECT = 15, STOP_SOUND = 16, PLAYER_LIST_HEADER_FOOTER = 17,
+                    NBT_QUERY = 18, COLLECT = 19, ENTITY_TELEPORT = 20, ADVANCEMENTS = 21, UPDATE_ATTRIBUTES = 22,
+                    ENTITY_EFFECT = 23, RECIPE_UPDATE = 24, TAGS = 25, MAP_CHUNK_BULK = 26, NAMED_ENTITY_SPAWN = 27, PING = 29,
+                    ADD_VIBRATION_SIGNAL = 30, CLEAR_TITLES = 31, INITIALIZE_BORDER = 32, PLAYER_COMBAT_END = 33,
+                    PLAYER_COMBAT_ENTER = 34, PLAYER_COMBAT_KILL = 35, SET_ACTIONBAR_TEXT = 36, SET_BORDER_CENTER = 37,
+                    SET_BORDER_LERP_SIZE = 38, SET_BORDER_SIZE = 39, SET_BORDER_WARNING_DELAY = 40, SET_BORDER_WARNING_DISTANCE = 41,
+                    SET_SUBTITLE_TEXT = 42, SET_TITLES_ANIMATION = 43, SET_TITLE_TEXT = 44;
+
+            private static void load() {
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_ENTITY, SPAWN_ENTITY);
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_ENTITY_EXPERIENCE_ORB, SPAWN_ENTITY_EXPERIENCE_ORB);
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_ENTITY_WEATHER, SPAWN_ENTITY_WEATHER);
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_ENTITY_LIVING, SPAWN_ENTITY_LIVING);
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_ENTITY_PAINTING, SPAWN_ENTITY_PAINTING);
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_ENTITY_SPAWN, SPAWN_ENTITY_SPAWN);
+                insertPacketID(PacketTypeClasses.Play.Server.ANIMATION, ANIMATION);
+                insertPacketID(PacketTypeClasses.Play.Server.STATISTIC, STATISTIC);
+                insertPacketID(PacketTypeClasses.Play.Server.BLOCK_BREAK, BLOCK_BREAK);
+                insertPacketID(PacketTypeClasses.Play.Server.BLOCK_BREAK_ANIMATION, BLOCK_BREAK_ANIMATION);
+                insertPacketID(PacketTypeClasses.Play.Server.TILE_ENTITY_DATA, TILE_ENTITY_DATA);
+                insertPacketID(PacketTypeClasses.Play.Server.BLOCK_ACTION, BLOCK_ACTION);
+                insertPacketID(PacketTypeClasses.Play.Server.BLOCK_CHANGE, BLOCK_CHANGE);
+                insertPacketID(PacketTypeClasses.Play.Server.BOSS, BOSS);
+                insertPacketID(PacketTypeClasses.Play.Server.SERVER_DIFFICULTY, SERVER_DIFFICULTY);
+                insertPacketID(PacketTypeClasses.Play.Server.CHAT, CHAT);
+                insertPacketID(PacketTypeClasses.Play.Server.MULTI_BLOCK_CHANGE, MULTI_BLOCK_CHANGE);
+                insertPacketID(PacketTypeClasses.Play.Server.TAB_COMPLETE, TAB_COMPLETE);
+                insertPacketID(PacketTypeClasses.Play.Server.COMMANDS, COMMANDS);
+                insertPacketID(PacketTypeClasses.Play.Server.TRANSACTION, TRANSACTION);
+                insertPacketID(PacketTypeClasses.Play.Server.CLOSE_WINDOW, CLOSE_WINDOW);
+                insertPacketID(PacketTypeClasses.Play.Server.WINDOW_ITEMS, WINDOW_ITEMS);
+                insertPacketID(PacketTypeClasses.Play.Server.WINDOW_DATA, WINDOW_DATA);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_SLOT, SET_SLOT);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_COOLDOWN, SET_COOLDOWN);
+                insertPacketID(PacketTypeClasses.Play.Server.CUSTOM_PAYLOAD, CUSTOM_PAYLOAD);
+                insertPacketID(PacketTypeClasses.Play.Server.CUSTOM_SOUND_EFFECT, CUSTOM_SOUND_EFFECT);
+                insertPacketID(PacketTypeClasses.Play.Server.KICK_DISCONNECT, KICK_DISCONNECT);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_STATUS, ENTITY_STATUS);
+                insertPacketID(PacketTypeClasses.Play.Server.EXPLOSION, EXPLOSION);
+                insertPacketID(PacketTypeClasses.Play.Server.UNLOAD_CHUNK, UNLOAD_CHUNK);
+                insertPacketID(PacketTypeClasses.Play.Server.GAME_STATE_CHANGE, GAME_STATE_CHANGE);
+                insertPacketID(PacketTypeClasses.Play.Server.OPEN_WINDOW_HORSE, OPEN_WINDOW_HORSE);
+                insertPacketID(PacketTypeClasses.Play.Server.KEEP_ALIVE, KEEP_ALIVE);
+                insertPacketID(PacketTypeClasses.Play.Server.MAP_CHUNK, MAP_CHUNK);
+                insertPacketID(PacketTypeClasses.Play.Server.WORLD_EVENT, WORLD_EVENT);
+                insertPacketID(PacketTypeClasses.Play.Server.WORLD_PARTICLES, WORLD_PARTICLES);
+                insertPacketID(PacketTypeClasses.Play.Server.LIGHT_UPDATE, LIGHT_UPDATE);
+                insertPacketID(PacketTypeClasses.Play.Server.LOGIN, LOGIN);
+                insertPacketID(PacketTypeClasses.Play.Server.MAP, MAP);
+                insertPacketID(PacketTypeClasses.Play.Server.OPEN_WINDOW_MERCHANT, OPEN_WINDOW_MERCHANT);
+                insertPacketID(PacketTypeClasses.Play.Server.REL_ENTITY_MOVE, REL_ENTITY_MOVE);
+                insertPacketID(PacketTypeClasses.Play.Server.REL_ENTITY_MOVE_LOOK, REL_ENTITY_MOVE_LOOK);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_LOOK, ENTITY_LOOK);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY, ENTITY);
+                insertPacketID(PacketTypeClasses.Play.Server.VEHICLE_MOVE, VEHICLE_MOVE);
+                insertPacketID(PacketTypeClasses.Play.Server.OPEN_BOOK, OPEN_BOOK);
+                insertPacketID(PacketTypeClasses.Play.Server.OPEN_WINDOW, OPEN_WINDOW);
+                insertPacketID(PacketTypeClasses.Play.Server.OPEN_SIGN_EDITOR, OPEN_SIGN_EDITOR);
+                insertPacketID(PacketTypeClasses.Play.Server.AUTO_RECIPE, AUTO_RECIPE);
+                insertPacketID(PacketTypeClasses.Play.Server.ABILITIES, ABILITIES);
+                insertPacketID(PacketTypeClasses.Play.Server.COMBAT_EVENT, COMBAT_EVENT);
+                insertPacketID(PacketTypeClasses.Play.Server.PLAYER_INFO, PLAYER_INFO);
+                insertPacketID(PacketTypeClasses.Play.Server.LOOK_AT, LOOK_AT);
+                insertPacketID(PacketTypeClasses.Play.Server.POSITION, POSITION);
+                insertPacketID(PacketTypeClasses.Play.Server.RECIPES, RECIPES);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_DESTROY, ENTITY_DESTROY);
+                insertPacketID(PacketTypeClasses.Play.Server.REMOVE_ENTITY_EFFECT, REMOVE_ENTITY_EFFECT);
+                insertPacketID(PacketTypeClasses.Play.Server.RESOURCE_PACK_SEND, RESOURCE_PACK_SEND);
+                insertPacketID(PacketTypeClasses.Play.Server.RESPAWN, RESPAWN);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_HEAD_ROTATION, ENTITY_HEAD_ROTATION);
+                insertPacketID(PacketTypeClasses.Play.Server.SELECT_ADVANCEMENT_TAB, SELECT_ADVANCEMENT_TAB);
+                insertPacketID(PacketTypeClasses.Play.Server.WORLD_BORDER, WORLD_BORDER);
+                insertPacketID(PacketTypeClasses.Play.Server.CAMERA, CAMERA);
+                insertPacketID(PacketTypeClasses.Play.Server.HELD_ITEM_SLOT, HELD_ITEM_SLOT);
+                insertPacketID(PacketTypeClasses.Play.Server.VIEW_CENTRE, VIEW_CENTRE);
+                insertPacketID(PacketTypeClasses.Play.Server.VIEW_DISTANCE, VIEW_DISTANCE);
+                insertPacketID(PacketTypeClasses.Play.Server.SCOREBOARD_DISPLAY_OBJECTIVE, SCOREBOARD_DISPLAY_OBJECTIVE);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_METADATA, ENTITY_METADATA);
+                insertPacketID(PacketTypeClasses.Play.Server.ATTACH_ENTITY, ATTACH_ENTITY);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_VELOCITY, ENTITY_VELOCITY);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_EQUIPMENT, ENTITY_EQUIPMENT);
+                insertPacketID(PacketTypeClasses.Play.Server.EXPERIENCE, EXPERIENCE);
+                insertPacketID(PacketTypeClasses.Play.Server.UPDATE_HEALTH, UPDATE_HEALTH);
+                insertPacketID(PacketTypeClasses.Play.Server.SCOREBOARD_OBJECTIVE, SCOREBOARD_OBJECTIVE);
+                insertPacketID(PacketTypeClasses.Play.Server.MOUNT, MOUNT);
+                insertPacketID(PacketTypeClasses.Play.Server.SCOREBOARD_TEAM, SCOREBOARD_TEAM);
+                insertPacketID(PacketTypeClasses.Play.Server.SCOREBOARD_SCORE, SCOREBOARD_SCORE);
+                insertPacketID(PacketTypeClasses.Play.Server.SPAWN_POSITION, SPAWN_POSITION);
+                insertPacketID(PacketTypeClasses.Play.Server.UPDATE_TIME, UPDATE_TIME);
+                insertPacketID(PacketTypeClasses.Play.Server.TITLE, TITLE);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_SOUND, ENTITY_SOUND);
+                insertPacketID(PacketTypeClasses.Play.Server.NAMED_SOUND_EFFECT, NAMED_SOUND_EFFECT);
+                insertPacketID(PacketTypeClasses.Play.Server.STOP_SOUND, STOP_SOUND);
+                insertPacketID(PacketTypeClasses.Play.Server.PLAYER_LIST_HEADER_FOOTER, PLAYER_LIST_HEADER_FOOTER);
+                insertPacketID(PacketTypeClasses.Play.Server.NBT_QUERY, NBT_QUERY);
+                insertPacketID(PacketTypeClasses.Play.Server.COLLECT, COLLECT);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_TELEPORT, ENTITY_TELEPORT);
+                insertPacketID(PacketTypeClasses.Play.Server.ADVANCEMENTS, ADVANCEMENTS);
+                insertPacketID(PacketTypeClasses.Play.Server.UPDATE_ATTRIBUTES, UPDATE_ATTRIBUTES);
+                insertPacketID(PacketTypeClasses.Play.Server.ENTITY_EFFECT, ENTITY_EFFECT);
+                insertPacketID(PacketTypeClasses.Play.Server.RECIPE_UPDATE, RECIPE_UPDATE);
+                insertPacketID(PacketTypeClasses.Play.Server.TAGS, TAGS);
+                insertPacketID(PacketTypeClasses.Play.Server.MAP_CHUNK_BULK, MAP_CHUNK_BULK);
+                insertPacketID(PacketTypeClasses.Play.Server.NAMED_ENTITY_SPAWN, NAMED_ENTITY_SPAWN);
+                insertPacketID(PacketTypeClasses.Play.Server.PING, PING);
+                insertPacketID(PacketTypeClasses.Play.Server.ADD_VIBRATION_SIGNAL, ADD_VIBRATION_SIGNAL);
+                insertPacketID(PacketTypeClasses.Play.Server.CLEAR_TITLES, CLEAR_TITLES );
+                insertPacketID(PacketTypeClasses.Play.Server.INITIALIZE_BORDER, INITIALIZE_BORDER);
+                insertPacketID(PacketTypeClasses.Play.Server.PLAYER_COMBAT_END, PLAYER_COMBAT_END);
+                insertPacketID(PacketTypeClasses.Play.Server.PLAYER_COMBAT_ENTER, PLAYER_COMBAT_ENTER);
+                insertPacketID(PacketTypeClasses.Play.Server.PLAYER_COMBAT_KILL, PLAYER_COMBAT_KILL);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_ACTIONBAR_TEXT, SET_ACTIONBAR_TEXT);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_BORDER_CENTER, SET_BORDER_CENTER);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_BORDER_LERP_SIZE, SET_BORDER_LERP_SIZE);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_BORDER_SIZE, SET_BORDER_SIZE);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_BORDER_WARNING_DELAY, SET_BORDER_WARNING_DELAY);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_BORDER_WARNING_DISTANCE, SET_BORDER_WARNING_DISTANCE);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_SUBTITLE_TEXT, SET_SUBTITLE_TEXT);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_TITLES_ANIMATION, SET_TITLES_ANIMATION);
+                insertPacketID(PacketTypeClasses.Play.Server.SET_TITLE_TEXT, SET_TITLE_TEXT);
+            }
+
+            /**
+             * Client-bound Play Packet Type utility.
+             * Save a few lines of code by using this.
+             *
+             * @author retrooper
+             * @since 1.8
+             */
+            public static class Util {
+                /**
+                 * Is the play packet a PacketPlayOutEntity, PacketPlayOutRelEntityMove, PacketPlayOutRelEntityMoveLook
+                 * or a PacketPlayOutEntityLook packet?
+                 *
+                 * @param packetID Play Packet ID.
+                 * @return Is the Packet ID an instance of the PacketPlayOutEntity packet?
+                 */
+                public static boolean isInstanceOfEntity(final byte packetID) {
+                    return packetID == ENTITY || packetID == REL_ENTITY_MOVE ||
+                            packetID == REL_ENTITY_MOVE_LOOK || packetID == ENTITY_LOOK;
+                }
+            }
+        }
+    }
+}

src/main/java/io/github/retrooper/packetevents/packettype/PacketTypeClasses.java

@@ -0,0 +1,401 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.packettype;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.github.retrooper.packetevents.utils.reflection.SubclassUtil;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+
+public class PacketTypeClasses {
+    public static void load() {
+        //STATUS
+        PacketTypeClasses.Status.Client.load();
+        PacketTypeClasses.Status.Server.load();
+        //HANDSHAKING
+        PacketTypeClasses.Handshaking.Client.load();
+        //LOGIN
+        PacketTypeClasses.Login.Client.load();
+        PacketTypeClasses.Login.Server.load();
+        //PLAY
+        PacketTypeClasses.Play.Client.load();
+        PacketTypeClasses.Play.Server.load();
+    }
+
+    public static class Status {
+        public static class Client {
+            private static String PREFIX;
+            public static Class<?> START, PING;
+
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.status.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                Client.START = Reflection.getClassByNameWithoutException(PREFIX + "PacketStatusInStart");
+                Client.PING = Reflection.getClassByNameWithoutException(PREFIX + "PacketStatusInPing");
+            }
+        }
+
+        public static class Server {
+            private static String PREFIX;
+            public static Class<?> PONG, SERVER_INFO;
+
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.status.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                Server.PONG = Reflection.getClassByNameWithoutException(PREFIX + "PacketStatusOutPong");
+                Server.SERVER_INFO = Reflection.getClassByNameWithoutException(PREFIX + "PacketStatusOutServerInfo");
+            }
+        }
+    }
+
+    public static class Handshaking {
+        public static class Client {
+            private static String PREFIX;
+            public static Class<?> SET_PROTOCOL;
+
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.handshake.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                Handshaking.Client.SET_PROTOCOL = Reflection.getClassByNameWithoutException(PREFIX + "PacketHandshakingInSetProtocol");
+            }
+        }
+    }
+
+    public static class Login {
+        public static class Client {
+            private static String PREFIX;
+            public static Class<?> CUSTOM_PAYLOAD, START, ENCRYPTION_BEGIN;
+
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.login.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                //In and Out custom payload login packets have been here since 1.13
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_13)) {
+                    Client.CUSTOM_PAYLOAD = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginInCustomPayload");
+                }
+                Client.START = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginInStart");
+                Client.ENCRYPTION_BEGIN = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginInEncryptionBegin");
+            }
+        }
+
+        public static class Server {
+            private static String PREFIX;
+            public static Class<?> CUSTOM_PAYLOAD, DISCONNECT, ENCRYPTION_BEGIN, SUCCESS, SET_COMPRESSION;
+
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.login.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                //In and Out custom payload login packets have been here since 1.13
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_13)) {
+                    Server.CUSTOM_PAYLOAD = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginOutCustomPayload");
+                }
+                Server.DISCONNECT = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginOutDisconnect");
+                Server.ENCRYPTION_BEGIN = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginOutEncryptionBegin");
+                Server.SUCCESS = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginOutSuccess");
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThan(ServerVersion.v_1_7_10)) {
+                    Server.SET_COMPRESSION = Reflection.getClassByNameWithoutException(PREFIX + "PacketLoginOutSetCompression");
+                }
+            }
+        }
+    }
+
+    public static class Play {
+        public static class Client {
+            private static String COMMON_PREFIX;
+            private static String PREFIX;
+            public static Class<?> FLYING, POSITION, POSITION_LOOK, LOOK, CLIENT_COMMAND,
+                    TRANSACTION, BLOCK_DIG, ENTITY_ACTION, USE_ENTITY,
+                    WINDOW_CLICK, STEER_VEHICLE, CUSTOM_PAYLOAD, ARM_ANIMATION,
+                    BLOCK_PLACE, USE_ITEM, ABILITIES, HELD_ITEM_SLOT,
+                    CLOSE_WINDOW, TAB_COMPLETE, CHAT, SET_CREATIVE_SLOT,
+                    KEEP_ALIVE, SETTINGS, ENCHANT_ITEM, TELEPORT_ACCEPT,
+                    TILE_NBT_QUERY, DIFFICULTY_CHANGE, B_EDIT, ENTITY_NBT_QUERY,
+                    JIGSAW_GENERATE, DIFFICULTY_LOCK, VEHICLE_MOVE, BOAT_MOVE, PICK_ITEM,
+                    AUTO_RECIPE, RECIPE_DISPLAYED, ITEM_NAME, RESOURCE_PACK_STATUS,
+                    ADVANCEMENTS, TR_SEL, BEACON, SET_COMMAND_BLOCK,
+                    SET_COMMAND_MINECART, SET_JIGSAW, STRUCT, UPDATE_SIGN, SPECTATE, PONG;
+
+            /**
+             * Initiate all server-bound play packet classes.
+             */
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.game.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                COMMON_PREFIX  = PREFIX + "PacketPlayIn";
+                FLYING = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Flying");
+                try {
+                    POSITION = Class.forName(COMMON_PREFIX + "Position");
+                    POSITION_LOOK = Class.forName(COMMON_PREFIX + "PositionLook");
+                    LOOK = Class.forName(COMMON_PREFIX + "Look");
+                } catch (ClassNotFoundException ex) {
+                    POSITION = SubclassUtil.getSubClass(FLYING,"PacketPlayInPosition");
+                    POSITION_LOOK = SubclassUtil.getSubClass(FLYING, "PacketPlayInPositionLook");
+                    LOOK = SubclassUtil.getSubClass(FLYING, "PacketPlayInLook");
+                }
+
+                //This packet does not exist in the 1.17+ protocol
+                TRANSACTION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Transaction");
+                //This packet was added in 1.17 protocol
+                PONG = Reflection.getClassByNameWithoutException(PREFIX + "ServerboundPongPacket");
+                try {
+                    SETTINGS = Class.forName(COMMON_PREFIX + "Settings");
+                    ENCHANT_ITEM = Class.forName(COMMON_PREFIX + "EnchantItem");
+
+                    CLIENT_COMMAND = Class.forName(COMMON_PREFIX + "ClientCommand");
+                    BLOCK_DIG = Class.forName(COMMON_PREFIX + "BlockDig");
+                    ENTITY_ACTION = Class.forName(COMMON_PREFIX + "EntityAction");
+                    USE_ENTITY = Class.forName(COMMON_PREFIX + "UseEntity");
+                    WINDOW_CLICK = Class.forName(COMMON_PREFIX + "WindowClick");
+                    STEER_VEHICLE = Class.forName(COMMON_PREFIX + "SteerVehicle");
+                    CUSTOM_PAYLOAD = Class.forName(COMMON_PREFIX + "CustomPayload");
+                    ARM_ANIMATION = Class.forName(COMMON_PREFIX + "ArmAnimation");
+                    ABILITIES = Class.forName(COMMON_PREFIX + "Abilities");
+                    HELD_ITEM_SLOT = Class.forName(COMMON_PREFIX + "HeldItemSlot");
+                    CLOSE_WINDOW = Class.forName(COMMON_PREFIX + "CloseWindow");
+                    TAB_COMPLETE = Class.forName(COMMON_PREFIX + "TabComplete");
+                    CHAT = Class.forName(COMMON_PREFIX + "Chat");
+                    SET_CREATIVE_SLOT = Class.forName(COMMON_PREFIX + "SetCreativeSlot");
+                    KEEP_ALIVE = Class.forName(COMMON_PREFIX + "KeepAlive");
+                    UPDATE_SIGN = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "UpdateSign");
+
+                    TELEPORT_ACCEPT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "TeleportAccept");
+                    TILE_NBT_QUERY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "TileNBTQuery");
+                    DIFFICULTY_CHANGE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "DifficultyChange");
+                    B_EDIT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "BEdit");
+                    ENTITY_NBT_QUERY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityNBTQuery");
+                    JIGSAW_GENERATE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "JigsawGenerate");
+                    DIFFICULTY_LOCK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "DifficultyLock");
+                    VEHICLE_MOVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "VehicleMove");
+                    BOAT_MOVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "BoatMove");
+                    PICK_ITEM = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "PickItem");
+                    AUTO_RECIPE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "AutoRecipe");
+                    RECIPE_DISPLAYED = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "RecipeDisplayed");
+                    ITEM_NAME = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ItemName");
+                    //1.8+
+                    RESOURCE_PACK_STATUS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ResourcePackStatus");
+
+                    ADVANCEMENTS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Advancements");
+                    TR_SEL = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "TrSel");
+                    BEACON = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Beacon");
+                    SET_COMMAND_BLOCK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SetCommandBlock");
+                    SET_COMMAND_MINECART = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SetCommandMinecart");
+                    SET_JIGSAW = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SetJigsaw");
+                    STRUCT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Struct");
+                    SPECTATE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Spectate");
+                } catch (Exception e) {
+                    e.printStackTrace();
+                }
+
+                try {
+                    BLOCK_PLACE = Class.forName(COMMON_PREFIX + "BlockPlace");
+                    USE_ITEM = Class.forName(COMMON_PREFIX + "UseItem");
+                } catch (Exception ignored) {
+                }
+
+            }
+        }
+
+        public static class Server {
+            private static String COMMON_PREFIX, PREFIX;
+            public static Class<?> SPAWN_ENTITY, SPAWN_ENTITY_EXPERIENCE_ORB, SPAWN_ENTITY_WEATHER, SPAWN_ENTITY_LIVING,
+                    SPAWN_ENTITY_PAINTING, SPAWN_ENTITY_SPAWN, ANIMATION, STATISTIC,
+                    BLOCK_BREAK, BLOCK_BREAK_ANIMATION, TILE_ENTITY_DATA, BLOCK_ACTION,
+                    BLOCK_CHANGE, BOSS, SERVER_DIFFICULTY, CHAT, MULTI_BLOCK_CHANGE,
+                    TAB_COMPLETE, COMMANDS, TRANSACTION, CLOSE_WINDOW,
+                    WINDOW_ITEMS, WINDOW_DATA, SET_SLOT, SET_COOLDOWN,
+                    CUSTOM_PAYLOAD, CUSTOM_SOUND_EFFECT, KICK_DISCONNECT, ENTITY_STATUS,
+                    EXPLOSION, UNLOAD_CHUNK, GAME_STATE_CHANGE, OPEN_WINDOW_HORSE,
+                    KEEP_ALIVE, MAP_CHUNK, WORLD_EVENT, WORLD_PARTICLES,
+                    LIGHT_UPDATE, LOGIN, MAP, OPEN_WINDOW_MERCHANT,
+                    REL_ENTITY_MOVE, REL_ENTITY_MOVE_LOOK, ENTITY_LOOK, ENTITY,
+                    VEHICLE_MOVE, OPEN_BOOK, OPEN_WINDOW, OPEN_SIGN_EDITOR,
+                    AUTO_RECIPE, ABILITIES, COMBAT_EVENT, PLAYER_INFO,
+                    LOOK_AT, POSITION, RECIPES, ENTITY_DESTROY,
+                    REMOVE_ENTITY_EFFECT, RESOURCE_PACK_SEND, RESPAWN, ENTITY_HEAD_ROTATION,
+                    SELECT_ADVANCEMENT_TAB, WORLD_BORDER, CAMERA, HELD_ITEM_SLOT,
+                    VIEW_CENTRE, VIEW_DISTANCE, SCOREBOARD_DISPLAY_OBJECTIVE, ENTITY_METADATA,
+                    ATTACH_ENTITY, ENTITY_VELOCITY, ENTITY_EQUIPMENT, EXPERIENCE,
+                    UPDATE_HEALTH, SCOREBOARD_OBJECTIVE, MOUNT, SCOREBOARD_TEAM,
+                    SCOREBOARD_SCORE, SPAWN_POSITION, UPDATE_TIME, TITLE,
+                    ENTITY_SOUND, NAMED_SOUND_EFFECT, STOP_SOUND, PLAYER_LIST_HEADER_FOOTER,
+                    NBT_QUERY, COLLECT, ENTITY_TELEPORT, ADVANCEMENTS, UPDATE_ATTRIBUTES,
+                    ENTITY_EFFECT, RECIPE_UPDATE, TAGS, MAP_CHUNK_BULK, NAMED_ENTITY_SPAWN, PING, ADD_VIBRATION_SIGNAL,
+                    CLEAR_TITLES, INITIALIZE_BORDER, PLAYER_COMBAT_END, PLAYER_COMBAT_ENTER, PLAYER_COMBAT_KILL,
+                    SET_ACTIONBAR_TEXT, SET_BORDER_CENTER, SET_BORDER_LERP_SIZE, SET_BORDER_SIZE, SET_BORDER_WARNING_DELAY,
+                    SET_BORDER_WARNING_DISTANCE, SET_SUBTITLE_TEXT, SET_TITLES_ANIMATION, SET_TITLE_TEXT;
+
+            /**
+             * Initiate all client-bound packet classes.
+             */
+            public static void load() {
+                if (PacketEvents.get().getServerUtils().getVersion().isNewerThanOrEquals(ServerVersion.v_1_17)) {
+                    PREFIX  = "net.minecraft.network.protocol.game.";
+                }
+                else {
+                    PREFIX = ServerVersion.getNMSDirectory() + ".";
+                }
+                COMMON_PREFIX  = PREFIX + "PacketPlayOut";
+                SPAWN_ENTITY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnEntity");
+                SPAWN_ENTITY_EXPERIENCE_ORB = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnEntityExperienceOrb");
+                SPAWN_ENTITY_WEATHER = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnEntityWeather");
+                SPAWN_ENTITY_LIVING = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnEntityLiving");
+                SPAWN_ENTITY_PAINTING = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnEntityPainting");
+                SPAWN_ENTITY_SPAWN = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnEntitySpawn");
+                ANIMATION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Animation");
+                STATISTIC = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Statistic");
+                BLOCK_BREAK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "BlockBreak");
+                BLOCK_BREAK_ANIMATION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "BlockBreakAnimation");
+                TILE_ENTITY_DATA = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "TileEntityData");
+                BLOCK_ACTION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "BlockAction");
+                BLOCK_CHANGE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "BlockChange");
+                BOSS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Boss");
+                SERVER_DIFFICULTY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ServerDifficulty");
+                CHAT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Chat");
+                MULTI_BLOCK_CHANGE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "MultiBlockChange");
+                TAB_COMPLETE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "TabComplete");
+                COMMANDS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Commands");
+                TRANSACTION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Transaction");
+                CLOSE_WINDOW = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "CloseWindow");
+                WINDOW_ITEMS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "WindowItems");
+                WINDOW_DATA = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "WindowData");
+                SET_SLOT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SetSlot");
+                SET_COOLDOWN = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SetCooldown");
+                CUSTOM_PAYLOAD = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "CustomPayload");
+                CUSTOM_SOUND_EFFECT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "CustomSoundEffect");
+                KICK_DISCONNECT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "KickDisconnect");
+                ENTITY_STATUS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityStatus");
+                EXPLOSION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Explosion");
+                UNLOAD_CHUNK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "UnloadChunk");
+                GAME_STATE_CHANGE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "GameStateChange");
+                OPEN_WINDOW_HORSE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "OpenWindowHorse");
+                KEEP_ALIVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "KeepAlive");
+                MAP_CHUNK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "MapChunk");
+                WORLD_EVENT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "WorldEvent");
+                WORLD_PARTICLES = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "WorldParticles");
+                LIGHT_UPDATE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "LightUpdate");
+                LOGIN = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Login");
+                MAP = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Map");
+                OPEN_WINDOW_MERCHANT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "OpenWindowMerchant");
+                ENTITY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Entity");
+                REL_ENTITY_MOVE = SubclassUtil.getSubClass(ENTITY, "PacketPlayOutRelEntityMove");
+                REL_ENTITY_MOVE_LOOK = SubclassUtil.getSubClass(ENTITY, "PacketPlayOutRelEntityMoveLook");
+                ENTITY_LOOK = SubclassUtil.getSubClass(ENTITY, "PacketPlayOutEntityLook");
+                if (REL_ENTITY_MOVE == null) {
+                    //is not a subclass and should be accessed normally
+                    REL_ENTITY_MOVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "RelEntityMove");
+                    REL_ENTITY_MOVE_LOOK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "RelEntityMoveLook");
+                    ENTITY_LOOK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "RelEntityLook");
+                }
+                VEHICLE_MOVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "VehicleMove");
+                OPEN_BOOK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "OpenBook");
+                OPEN_WINDOW = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "OpenWindow");
+                OPEN_SIGN_EDITOR = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "OpenSignEditor");
+                AUTO_RECIPE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "AutoRecipe");
+                ABILITIES = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Abilities");
+                COMBAT_EVENT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "CombatEvent");
+                PLAYER_INFO = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "PlayerInfo");
+                LOOK_AT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "LookAt");
+                POSITION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Position");
+                RECIPES = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Recipes");
+                ENTITY_DESTROY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityDestroy");
+                REMOVE_ENTITY_EFFECT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "RemoveEntityEffect");
+                RESOURCE_PACK_SEND = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ResourcePackSend");
+                RESPAWN = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Respawn");
+                ENTITY_HEAD_ROTATION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityHeadRotation");
+                SELECT_ADVANCEMENT_TAB = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SelectAdvancementTab");
+                WORLD_BORDER = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "WorldBorder");
+                CAMERA = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Camera");
+                HELD_ITEM_SLOT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "HeldItemSlot");
+                VIEW_CENTRE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ViewCentre");
+                VIEW_DISTANCE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ViewDistance");
+                SCOREBOARD_DISPLAY_OBJECTIVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ScoreboardDisplayObjective");
+                ENTITY_METADATA = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityMetadata");
+                ATTACH_ENTITY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "AttachEntity");
+                ENTITY_VELOCITY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityVelocity");
+                ENTITY_EQUIPMENT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityEquipment");
+                EXPERIENCE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Experience");
+                UPDATE_HEALTH = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "UpdateHealth");
+                SCOREBOARD_OBJECTIVE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ScoreboardObjective");
+                MOUNT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Mount");
+                SCOREBOARD_TEAM = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ScoreboardTeam");
+                SCOREBOARD_SCORE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "ScoreboardScore");
+                SPAWN_POSITION = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "SpawnPosition");
+                UPDATE_TIME = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "UpdateTime");
+                TITLE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Title");
+                ENTITY_SOUND = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntitySound");
+                NAMED_SOUND_EFFECT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "NamedSoundEffect");
+                STOP_SOUND = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "StopSound");
+                PLAYER_LIST_HEADER_FOOTER = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "PlayerListHeaderFooter");
+                NBT_QUERY = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "NBTQuery");
+                COLLECT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Collect");
+                ENTITY_TELEPORT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityTeleport");
+                ADVANCEMENTS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Advancements");
+                UPDATE_ATTRIBUTES = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "UpdateAttributes");
+                ENTITY_EFFECT = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "EntityEffect");
+                RECIPE_UPDATE = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "RecipeUpdate");
+                TAGS = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "Tags");
+                MAP_CHUNK_BULK = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "MapChunkBulk");
+                NAMED_ENTITY_SPAWN = Reflection.getClassByNameWithoutException(COMMON_PREFIX + "NamedEntitySpawn");
+
+                //These packets were added in 1.17
+                PING = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundPingPacket");
+                ADD_VIBRATION_SIGNAL = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundAddVibrationSignalPacket");
+                CLEAR_TITLES = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundClearTitlesPacket");
+                INITIALIZE_BORDER = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundInitializeBorderPacket");
+                PLAYER_COMBAT_END = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundPlayerCombatEndPacket");
+                PLAYER_COMBAT_ENTER = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundPlayerCombatEnterPacket");
+                PLAYER_COMBAT_KILL = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundPlayerCombatKillPacket");
+                SET_ACTIONBAR_TEXT = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetActionBarTextPacket");
+                SET_BORDER_CENTER = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetBorderCenterPacket");
+                SET_BORDER_LERP_SIZE = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetBorderLerpSizePacket");
+                SET_BORDER_SIZE = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetBorderSizePacket");
+                SET_BORDER_WARNING_DELAY = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetBorderWarningDelayPacket");
+                SET_BORDER_WARNING_DISTANCE = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetBorderWarningDistancePacket");
+                SET_SUBTITLE_TEXT = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetSubtitleTextPacket");
+                SET_TITLES_ANIMATION = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetTitlesAnimationPacket");
+                SET_TITLE_TEXT = Reflection.getClassByNameWithoutException(PREFIX + "ClientboundSetTitleTextPacket");
+            }
+        }
+    }
+
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/NMSPacket.java

@@ -0,0 +1,37 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers;
+
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+
+public class NMSPacket {
+    private final Object rawNMSPacket;
+
+    public NMSPacket(Object rawNMSPacket) {
+        this.rawNMSPacket = rawNMSPacket;
+    }
+
+    public Object getRawNMSPacket() {
+        return rawNMSPacket;
+    }
+
+    public String getName() {
+        return ClassUtil.getClassSimpleName(rawNMSPacket.getClass());
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/Sendable.java

@@ -1,5 +0,0 @@
-package io.github.retrooper.packetevents.packetwrappers;
-
-public interface Sendable {
-    Object asNMSPacket();
-}

src/main/java/io/github/retrooper/packetevents/packetwrappers/WrappedPacket.java

@@ -0,0 +1,550 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers;
+
+import io.github.retrooper.packetevents.PacketEvents;
+import io.github.retrooper.packetevents.exceptions.WrapperFieldNotFoundException;
+import io.github.retrooper.packetevents.exceptions.WrapperUnsupportedUsageException;
+import io.github.retrooper.packetevents.packettype.PacketTypeClasses;
+import io.github.retrooper.packetevents.packetwrappers.api.WrapperPacketReader;
+import io.github.retrooper.packetevents.packetwrappers.api.WrapperPacketWriter;
+import io.github.retrooper.packetevents.utils.enums.EnumUtil;
+import io.github.retrooper.packetevents.utils.nms.NMSUtils;
+import io.github.retrooper.packetevents.utils.player.GameMode;
+import io.github.retrooper.packetevents.utils.reflection.ClassUtil;
+import io.github.retrooper.packetevents.utils.reflection.Reflection;
+import io.github.retrooper.packetevents.utils.server.ServerVersion;
+import io.github.retrooper.packetevents.utils.vector.Vector3i;
+import io.github.retrooper.packetevents.utils.world.Difficulty;
+import io.github.retrooper.packetevents.utils.world.Dimension;
+import org.bukkit.inventory.ItemStack;
+
+import java.lang.annotation.ElementType;
+import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
+import java.lang.annotation.Target;
+import java.lang.reflect.Field;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.logging.Level;
+
+public class WrappedPacket implements WrapperPacketReader, WrapperPacketWriter {
+
+    private static final Map<Class<? extends WrappedPacket>, Boolean> LOADED_WRAPPERS = new ConcurrentHashMap<>();
+    private static final Map<Class<?>, Map<Class<?>, Field[]>> FIELD_CACHE = new ConcurrentHashMap<>();
+    private static final Field[] EMPTY_FIELD_ARRAY = new Field[0];
+    public static ServerVersion version;
+    protected final NMSPacket packet;
+    private final Class<?> packetClass;
+
+    public WrappedPacket() {
+        packet = null;
+        packetClass = null;
+        load0();
+    }
+
+    public WrappedPacket(final NMSPacket packet) {
+        this(packet, packet.getRawNMSPacket().getClass());
+    }
+
+    public WrappedPacket(final NMSPacket packet, Class<?> packetClass) {
+        if (packetClass.getSuperclass().equals(PacketTypeClasses.Play.Client.FLYING)) {
+            packetClass = PacketTypeClasses.Play.Client.FLYING;
+        } else if (packetClass.getSuperclass().equals(PacketTypeClasses.Play.Server.ENTITY)) {
+            packetClass = PacketTypeClasses.Play.Server.ENTITY;
+        }
+        this.packetClass = packetClass;
+        this.packet = packet;
+        load0();
+    }
+
+    private void load0() {
+        final Class<? extends WrappedPacket> clazz = getClass();
+        if (!LOADED_WRAPPERS.containsKey(clazz)) {
+            if (!isSupported()) {
+                throw new WrapperUnsupportedUsageException(getClass());
+            }
+            try {
+                load();
+            } catch (Exception ex) {
+                String wrapperName = ClassUtil.getClassSimpleName(clazz);
+                PacketEvents.get().getPlugin().getLogger()
+                        .log(Level.SEVERE, "PacketEvents found an exception while loading the " + wrapperName + " packet wrapper. Please report this bug! Tell us about your server version, spigot and code(of you using the wrapper)", ex);
+                LOADED_WRAPPERS.put(clazz, false);
+            }
+            LOADED_WRAPPERS.put(clazz, true);
+        }
+    }
+
+    protected void load() {
+    }
+
+    protected boolean hasLoaded() {
+        return LOADED_WRAPPERS.getOrDefault(getClass(), false);
+    }
+
+    protected void throwUnsupportedOperation(Enum<?> enumConst) throws UnsupportedOperationException {
+        Class<?> enumConstClass = enumConst.getClass();
+        Field field = null;
+        try {
+            field = enumConstClass.getField(enumConst.name());
+        } catch (NoSuchFieldException e) {
+            e.printStackTrace();
+        }
+        if (field.isAnnotationPresent(SupportedVersions.class)) {
+            SupportedVersions supportedVersions = field.getAnnotation(SupportedVersions.class);
+            List<ServerVersion> versionList = parseSupportedVersionsAnnotation(supportedVersions);
+            String supportedVersionsMsg = Arrays.toString(versionList.toArray(new ServerVersion[0]));
+            throw new UnsupportedOperationException("PacketEvents failed to use the " + enumConst.name() + " enum constant in the " + enumConstClass.getSimpleName() + " enum. This enum constant is not supported on your server version. (" + PacketEvents.get().getServerUtils().getVersion() + ")\n This enum constant is only supported on these server versions: " + supportedVersionsMsg);
+        } else {
+            throw new UnsupportedOperationException("PacketEvents failed to use the " + enumConst.name() + " enum constant in the " + enumConstClass.getSimpleName() + " enum. This enum constant is not supported on your server version. (" + PacketEvents.get().getServerUtils().getVersion() + ")\n Failed to find out what server versions this enum constant is supported on.");
+        }
+    }
+
+    protected void throwUnsupportedOperation() throws UnsupportedOperationException {
+        final String currentMethodName = "throwUnsupportedOperation";
+        StackTraceElement[] stackTraceElements = Thread.currentThread().getStackTrace();
+        int stackTraceElementIndex = 2;
+        for (int i = 0; i < stackTraceElements.length; i++) {
+            StackTraceElement element = stackTraceElements[i];
+            if (element.getMethodName().equals(currentMethodName)) {
+                stackTraceElementIndex = i + 1; //It is the next method
+                break;
+            }
+        }
+        StackTraceElement stackTraceElement = stackTraceElements[stackTraceElementIndex];
+        String methodName = stackTraceElement.getMethodName();
+        List<Method> possibleMethods = Reflection.getMethods(getClass(), methodName, (Class<?>) null);
+        Method method = null;
+        for (Method m : possibleMethods) {
+            if (m.isAnnotationPresent(SupportedVersions.class)) {
+                method = m;
+                break;
+            }
+        }
+        if (method == null) {
+            throw new UnsupportedOperationException("PacketEvents failed to access your requested field. This field is not supported on your server version. Failed to lookup the server versions this field supports...");
+        } else {
+            SupportedVersions supportedVersions = method.getAnnotation(SupportedVersions.class);
+            List<ServerVersion> versionList = parseSupportedVersionsAnnotation(supportedVersions);
+
+            String supportedVersionsMsg = Arrays.toString(versionList.toArray(new ServerVersion[0]));
+            throw new UnsupportedOperationException("PacketEvents failed to access your requested field. This field is not supported on your server version. (" + PacketEvents.get().getServerUtils().getVersion() + ")\n This field is only supported on these server versions: " + supportedVersionsMsg);
+        }
+    }
+
+    private List<ServerVersion> parseSupportedVersionsAnnotation(SupportedVersions supportedVersions) {
+        List<ServerVersion> versionList = new ArrayList<>();
+        for (int i = 0; i < supportedVersions.ranges().length; i += 2) {
+            ServerVersion first = supportedVersions.ranges()[i];
+            ServerVersion last = supportedVersions.ranges()[i + 1];
+            if (first == last) {
+                versionList.add(first);
+                continue;
+            } else if (first == ServerVersion.ERROR) {
+                first = ServerVersion.getOldest();
+            } else if (last == ServerVersion.ERROR) {
+                last = ServerVersion.getLatest();
+            }
+            versionList.addAll(Arrays.asList(ServerVersion.values()).subList(first.ordinal(), last.ordinal() + 1));
+        }
+        versionList.remove(ServerVersion.ERROR);
+        return versionList;
+    }
+
+
+    @Override
+    public boolean readBoolean(int index) {
+        return read(index, boolean.class);
+    }
+
+    @Override
+    public byte readByte(int index) {
+        return read(index, byte.class);
+    }
+
+    @Override
+    public short readShort(int index) {
+        return read(index, short.class);
+    }
+
+    @Override
+    public int readInt(int index) {
+        return read(index, int.class);
+    }
+
+    @Override
+    public long readLong(int index) {
+        return read(index, long.class);
+    }
+
+    @Override
+    public float readFloat(int index) {
+        return read(index, float.class);
+    }
+
+    @Override
+    public double readDouble(int index) {
+        return read(index, double.class);
+    }
+
+    @Override
+    public boolean[] readBooleanArray(int index) {
+        return read(index, boolean[].class);
+    }
+
+    @Override
+    public byte[] readByteArray(int index) {
+        return read(index, byte[].class);
+    }
+
+    @Override
+    public short[] readShortArray(int index) {
+        return read(index, short[].class);
+    }
+
+    @Override
+    public int[] readIntArray(int index) {
+        return read(index, int[].class);
+    }
+
+    @Override
+    public long[] readLongArray(int index) {
+        return read(index, long[].class);
+    }
+
+    @Override
+    public float[] readFloatArray(int index) {
+        return read(index, float[].class);
+    }
+
+    @Override
+    public double[] readDoubleArray(int index) {
+        return read(index, double[].class);
+    }
+
+    @Override
+    public String[] readStringArray(int index) {
+        return read(index, String[].class); // JavaImpact: Can we be sure that returning the original array is okay? retrooper: Yes
+    }
+
+    @Override
+    public String readString(int index) {
+        return read(index, String.class);
+    }
+
+    @Override
+    public Object readAnyObject(int index) {
+        try {
+            Field f = packetClass.getDeclaredFields()[index];
+            if (!f.isAccessible()) {
+                f.setAccessible(true);
+            }
+            try {
+                return f.get(packet.getRawNMSPacket());
+            } catch (IllegalAccessException | NullPointerException | ArrayIndexOutOfBoundsException e) {
+                e.printStackTrace();
+            }
+        } catch (ArrayIndexOutOfBoundsException e) {
+            throw new WrapperFieldNotFoundException("PacketEvents failed to find any field indexed " + index + " in the " + ClassUtil.getClassSimpleName(packetClass) + " class!");
+        }
+        return null;
+    }
+
+    @Override
+    public <T> T readObject(int index, Class<? extends T> type) {
+        return read(index, type);
+    }
+
+    @Override
+    public Enum<?> readEnumConstant(int index, Class<? extends Enum<?>> type) {
+        return read(index, type);
+    }
+
+    @SuppressWarnings("unchecked")
+    public <T> T read(int index, Class<? extends T> type) {
+        try {
+            Field field = getField(type, index);
+            return (T) field.get(packet.getRawNMSPacket());
+        } catch (IllegalAccessException | NullPointerException | ArrayIndexOutOfBoundsException e) {
+            throw new WrapperFieldNotFoundException(packetClass, type, index);
+        }
+    }
+
+
+    @Override
+    public void writeBoolean(int index, boolean value) {
+        write(boolean.class, index, value);
+    }
+
+    @Override
+    public void writeByte(int index, byte value) {
+        write(byte.class, index, value);
+    }
+
+    @Override
+    public void writeShort(int index, short value) {
+        write(short.class, index, value);
+    }
+
+    @Override
+    public void writeInt(int index, int value) {
+        write(int.class, index, value);
+    }
+
+    @Override
+    public void writeLong(int index, long value) {
+        write(long.class, index, value);
+    }
+
+    @Override
+    public void writeFloat(int index, float value) {
+        write(float.class, index, value);
+    }
+
+    @Override
+    public void writeDouble(int index, double value) {
+        write(double.class, index, value);
+    }
+
+    @Override
+    public void writeString(int index, String value) {
+        write(String.class, index, value);
+    }
+
+    @Override
+    public void writeObject(int index, Object value) {
+        write(value.getClass(), index, value);
+    }
+
+    @Override
+    public void writeBooleanArray(int index, boolean[] array) {
+        write(boolean[].class, index, array);
+    }
+
+    @Override
+    public void writeByteArray(int index, byte[] value) {
+        write(byte[].class, index, value);
+    }
+
+    @Override
+    public void writeShortArray(int index, short[] value) {
+        write(short[].class, index, value);
+    }
+
+    @Override
+    public void writeIntArray(int index, int[] value) {
+        write(int[].class, index, value);
+    }
+
+    @Override
+    public void writeLongArray(int index, long[] value) {
+        write(long[].class, index, value);
+    }
+
+    @Override
+    public void writeFloatArray(int index, float[] value) {
+        write(float[].class, index, value);
+    }
+
+    @Override
+    public void writeDoubleArray(int index, double[] value) {
+        write(double[].class, index, value);
+    }
+
+    @Override
+    public void writeStringArray(int index, String[] value) {
+        write(String[].class, index, value);
+    }
+
+    @Override
+    public void writeAnyObject(int index, Object value) {
+        try {
+            Field f = packetClass.getDeclaredFields()[index];
+            f.set(packet.getRawNMSPacket(), value);
+        } catch (Exception e) {
+            throw new WrapperFieldNotFoundException("PacketEvents failed to find any field indexed " + index + " in the " + ClassUtil.getClassSimpleName(packetClass) + " class!");
+        }
+    }
+
+    @Override
+    public void writeEnumConstant(int index, Enum<?> enumConstant) {
+        try {
+            write(enumConstant.getClass(), index, enumConstant);
+        }
+        catch (WrapperFieldNotFoundException ex) {
+            write(enumConstant.getDeclaringClass(), index, enumConstant);
+        }
+    }
+
+    public void write(Class<?> type, int index, Object value) throws WrapperFieldNotFoundException {
+        Field field = getField(type, index);
+        if (field == null) {
+            throw new WrapperFieldNotFoundException(packetClass, type, index);
+        }
+        try {
+            field.set(packet.getRawNMSPacket(), value);
+        } catch (IllegalAccessException | NullPointerException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public Vector3i readBlockPosition(int index) {
+        Object blockPosObj = readObject(index, NMSUtils.blockPosClass);
+        try {
+            int x = (int) NMSUtils.getBlockPosX.invoke(blockPosObj);
+            int y = (int) NMSUtils.getBlockPosY.invoke(blockPosObj);
+            int z = (int) NMSUtils.getBlockPosZ.invoke(blockPosObj);
+            return new Vector3i(x, y, z);
+        } catch (IllegalAccessException | InvocationTargetException e) {
+            e.printStackTrace();
+            return null;
+        }
+    }
+
+    public void writeBlockPosition(int index, Vector3i blockPosition) {
+        Object blockPosObj = NMSUtils.generateNMSBlockPos(blockPosition);
+        write(NMSUtils.blockPosClass, index, blockPosObj);
+    }
+
+    public ItemStack readItemStack(int index) {
+        Object nmsItemStack = readObject(index, NMSUtils.nmsItemStackClass);
+        return NMSUtils.toBukkitItemStack(nmsItemStack);
+    }
+
+    public void writeItemStack(int index, ItemStack stack) {
+        Object nmsItemStack = NMSUtils.toNMSItemStack(stack);
+        write(NMSUtils.nmsItemStackClass, index, nmsItemStack);
+    }
+
+    public GameMode readGameMode(int index) {
+        Enum<?> enumConst = readEnumConstant(index, NMSUtils.enumGameModeClass);
+        return GameMode.values()[enumConst.ordinal() - 1];
+    }
+
+    public void writeGameMode(int index, GameMode gameMode) {
+        Enum<?> enumConst = EnumUtil.valueByIndex(NMSUtils.enumGameModeClass, gameMode.ordinal() + 1);
+        writeEnumConstant(index, enumConst);
+    }
+
+    public Dimension readDimension(int index, int dimensionIDLegacyIndex) {
+        int dimensionID;
+        if (version.isOlderThan(ServerVersion.v_1_13_2)) {
+            dimensionID = readInt(dimensionIDLegacyIndex);
+        } else {
+            Object dimensionManagerObject = readObject(index, NMSUtils.dimensionManagerClass);
+            WrappedPacket dimensionManagerWrapper = new WrappedPacket(new NMSPacket(dimensionManagerObject));
+            dimensionID = dimensionManagerWrapper.readInt(0) - 1;
+        }
+        return Dimension.getById(dimensionID);
+    }
+
+    public void writeDimension(int index, int dimensionIDLegacyIndex, Dimension dimension) {
+        if (version.isOlderThan(ServerVersion.v_1_13_2)) {
+            writeInt(dimensionIDLegacyIndex, dimension.getId());
+        } else {
+            Object dimensionManagerObject = readObject(index, NMSUtils.dimensionManagerClass);
+            WrappedPacket dimensionManagerWrapper = new WrappedPacket(new NMSPacket(dimensionManagerObject));
+            dimensionManagerWrapper.writeInt(0, dimension.getId() + 1);
+        }
+    }
+
+
+    public Difficulty readDifficulty(int index) {
+        Enum<?> enumConstant = readEnumConstant(index, NMSUtils.enumDifficultyClass);
+        return Difficulty.values()[enumConstant.ordinal()];
+    }
+
+    public void writeDifficulty(int index, Difficulty difficulty) {
+        Enum<?> enumConstant = EnumUtil.valueByIndex(NMSUtils.enumDifficultyClass, difficulty.ordinal());
+        writeEnumConstant(index, enumConstant);
+    }
+
+    public String readIChatBaseComponent(int index) {
+        Object iChatBaseComponent = readObject(index, NMSUtils.iChatBaseComponentClass);
+        return NMSUtils.readIChatBaseComponent(iChatBaseComponent);
+    }
+
+    public void writeIChatBaseComponent(int index, String content) {
+        Object iChatBaseComponent = NMSUtils.generateIChatBaseComponent(content);
+        write(NMSUtils.iChatBaseComponentClass, index, iChatBaseComponent);
+    }
+
+    public List<Object> readList(int index) {
+        return read(index, List.class);
+    }
+
+    public void writeList(int index, List<Object> list) {
+        write(List.class, index, list);
+    }
+
+    private Field getField(Class<?> type, int index) {
+        Map<Class<?>, Field[]> cached = FIELD_CACHE.computeIfAbsent(packetClass, k -> new ConcurrentHashMap<>());
+        Field[] fields = cached.computeIfAbsent(type, typeClass -> getFields(typeClass, packetClass.getDeclaredFields()));
+        if (fields.length >= index + 1) {
+            return fields[index];
+        } else {
+            throw new WrapperFieldNotFoundException(packetClass, type, index);
+        }
+    }
+
+    private Field[] getFields(Class<?> type, Field[] fields) {
+        List<Field> ret = new ArrayList<>();
+        for (Field field : fields) {
+            if (field.getType().equals(type)) {
+                if (!field.isAccessible()) {
+                    field.setAccessible(true);
+                }
+                ret.add(field);
+            }
+        }
+        return ret.toArray(EMPTY_FIELD_ARRAY);
+    }
+
+
+    /**
+     * Does the local server version support reading at-least one field with this packet wrapper?
+     * If it does, we can label this wrapper to be supported on the local server version.
+     * One example where it would not be supported would be if the packet the wrapper is wrapping doesn't even exist on the local server version.
+     *
+     * @return Is the wrapper supported on the local server version?
+     */
+    public boolean isSupported() {
+        return true;
+    }
+
+    /**
+     * If a method in a wrapper is annotated with this, it means it isn't supported on all server versions.
+     * It not being supported by all server versions can lead to exceptions. Make sure you always decompile a wrapper getter before using it.
+     * This annotation will specify what versions are supported.
+     *
+     * @author retrooper
+     * @since 1.8
+     */
+    @Target({ElementType.METHOD, ElementType.FIELD, ElementType.CONSTRUCTOR})
+    @Retention(RetentionPolicy.RUNTIME)
+    public @interface SupportedVersions {
+        ServerVersion[] ranges() default {};
+    }
+}

src/main/java/io/github/retrooper/packetevents/packetwrappers/api/SendableWrapper.java

@@ -0,0 +1,29 @@
+/*
+ * This file is part of packetevents - https://github.com/retrooper/packetevents
+ * Copyright (C) 2021 retrooper and contributors
+ *
+ * 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/>.
+ */
+
+package io.github.retrooper.packetevents.packetwrappers.api;
+
+/**
+ * Packet-Wrappers that can be sent to clients.
+ *
+ * @author retrooper
+ * //TODO since javadoc annotation
+ */
+public interface SendableWrapper {
+    Object asNMSPacket() throws Exception;
+}