First working versionHEADmain

* Add general minecraft fabric mod skeleton
* Add object formatter
* Add command to test formatter on one packet

13 files changed, 667 insertions, 0 deletions

diff --git a/.gitattributes b/.gitattributes
new file mode 100644
index 0000000..097f9f9
--- /dev/null
+++ b/.gitattributes
@@ -0,0 +1,9 @@
+#
+# https://help.github.com/articles/dealing-with-line-endings/
+#
+# Linux start script should use lf
+/gradlew        text eol=lf
+
+# These are Windows script files and should use crlf
+*.bat           text eol=crlf
+
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..79dc205
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,8 @@
+# Ignore Gradle project-specific cache directory
+.gradle
+
+# Ignore Gradle build output directory
+build
+
+run/
+
diff --git a/build.gradle.kts b/build.gradle.kts
new file mode 100644
index 0000000..378fb55
--- /dev/null
+++ b/build.gradle.kts
@@ -0,0 +1,23 @@
+plugins {
+    java
+    `maven-publish`
+    kotlin("jvm") version "1.9.0"
+    id("dev.architectury.loom") version "1.4.362"
+}
+
+java {
+    withSourcesJar()
+}
+
+repositories {
+    mavenCentral()
+}
+
+dependencies {
+    "minecraft"(libs.minecraft)
+    "mappings"("net.fabricmc:yarn:${libs.versions.yarn.get()}:v2")
+
+    modImplementation(libs.fabric.kotlin)
+    modImplementation(libs.fabric.api)
+    modImplementation (libs.fabric.loader)
+}
\ No newline at end of file
diff --git a/gradle.properties b/gradle.properties
new file mode 100644
index 0000000..6b4ec03
--- /dev/null
+++ b/gradle.properties
@@ -0,0 +1,2 @@
+org.gradle.jvmargs=-Xmx4g
+
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
new file mode 100644
index 0000000..301652a
--- /dev/null
+++ b/gradle/libs.versions.toml
@@ -0,0 +1,19 @@
+[versions]
+minecraft = "1.20.2"
+yarn = "1.20.2+build.1"
+kotlin = "1.9.10"
+fabric_api = "0.90.7+1.20.2"
+fabric_kotlin = "1.10.10+kotlin.1.9.10"
+fabric_loader = "0.14.22"
+
+
+[libraries]
+minecraft = { module = "com.mojang:minecraft", version.ref = "minecraft" }
+fabric_kotlin = { module = "net.fabricmc:fabric-language-kotlin", version.ref = "fabric_kotlin" }
+fabric_api = { module = "net.fabricmc.fabric-api:fabric-api", version.ref = "fabric_api" }
+fabric_loader = { module = "net.fabricmc:fabric-loader", version.ref = "fabric_loader" }
+
+[plugins]
+kotlin = { id = "org.jetbrains.kotlin.jvm", version.ref = "kotlin" }
+
+
diff --git a/gradle/wrapper/gradle-wrapper.jar b/gradle/wrapper/gradle-wrapper.jar
new file mode 100644
index 0000000..7f93135
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.jar
diff --git a/gradle/wrapper/gradle-wrapper.properties b/gradle/wrapper/gradle-wrapper.properties
new file mode 100644
index 0000000..ac72c34
--- /dev/null
+++ b/gradle/wrapper/gradle-wrapper.properties
@@ -0,0 +1,7 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists
diff --git a/gradlew b/gradlew
new file mode 100755
index 0000000..0adc8e1
--- /dev/null
+++ b/gradlew
@@ -0,0 +1,249 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original 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 POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
+APP_HOME=$( cd "${APP_HOME:-./}" > /dev/null && pwd -P ) || exit
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | 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: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+
+# 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"'
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"
diff --git a/gradlew.bat b/gradlew.bat
new file mode 100644
index 0000000..93e3f59
--- /dev/null
+++ b/gradlew.bat
@@ -0,0 +1,92 @@
+@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=.
+@rem This is normally unused
+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% equ 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% equ 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!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega
diff --git a/settings.gradle.kts b/settings.gradle.kts
new file mode 100644
index 0000000..0e68ead
--- /dev/null
+++ b/settings.gradle.kts
@@ -0,0 +1,26 @@
+pluginManagement {
+    repositories {
+        mavenLocal()
+        maven {
+            name = "fabricmc"
+            url = uri("https://maven.fabricmc.net/")
+        }
+        maven {
+            name = "architectury"
+            url = uri("https://maven.architectury.dev/")
+        }
+        maven {
+            name = "forgemc"
+            url = uri("https://maven.minecraftforge.net/")
+        }
+        maven {
+            name = "jitpack"
+            url = uri("https://jitpack.io")
+        }
+        mavenCentral()
+        gradlePluginPortal()
+    }
+}
+
+
+rootProject.name = "wheelchair"
diff --git a/src/main/kotlin/com/walkerselby/wheelchair/client/Formatter.kt b/src/main/kotlin/com/walkerselby/wheelchair/client/Formatter.kt
new file mode 100644
index 0000000..c48d34c
--- /dev/null
+++ b/src/main/kotlin/com/walkerselby/wheelchair/client/Formatter.kt
@@ -0,0 +1,174 @@
+package com.walkerselby.wheelchair.client
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectMap
+import net.minecraft.item.ItemStack
+import net.minecraft.network.packet.Packet
+import net.minecraft.text.Text
+import java.lang.reflect.Field
+import java.lang.reflect.Modifier
+
+val Field.isStatic: Boolean
+    get() = (modifiers and Modifier.STATIC) != 0
+
+interface Printer {
+    fun emitName(value: String)
+    fun emitValue(value: String)
+    fun beginObject(label: String): Printer
+    fun beginList(label: String): Printer
+}
+
+class AccumulatingPrinter(
+    val indent: Int,
+    val stringBuilder: StringBuilder,
+    val isListBuilder: Boolean,
+) : Printer {
+
+    fun appendIndent() {
+        stringBuilder.append(" ".repeat(indent))
+    }
+
+    override fun emitName(value: String) {
+        if (isListBuilder) {
+            error("Cannot print name within a list")
+        }
+        appendIndent()
+        stringBuilder.append(value)
+        stringBuilder.append(": ")
+    }
+
+    override fun emitValue(value: String) {
+        if (isListBuilder)
+            stringBuilder.append("* ")
+        else
+            stringBuilder.append("")
+        stringBuilder.append(value)
+        stringBuilder.append("\n")
+    }
+
+    override fun beginObject(label: String): Printer {
+        if (isListBuilder) {
+            stringBuilder.append("* $label:\n")
+        } else {
+            stringBuilder.append("$label\n")
+        }
+        return AccumulatingPrinter(indent + 2, stringBuilder, false)
+    }
+
+    override fun beginList(label: String): Printer {
+        if (isListBuilder) {
+            stringBuilder.append("* $label\n")
+        } else {
+            stringBuilder.append("$label:\n")
+        }
+        return AccumulatingPrinter(indent + 2, stringBuilder, true)
+    }
+
+}
+
+fun interface Formatter<T> {
+
+    fun prettyPrint(subject: T, printer: Printer)
+
+    companion object {
+        private val formatters = mutableMapOf<Class<*>, Formatter<*>>()
+        private val dynamicFormatter = mutableListOf<(Class<*>) -> Formatter<*>?>()
+        private val processing = mutableSetOf<Class<*>>()
+
+        fun <V> putFormatter(clazz: Class<V>, formatter: Formatter<V>) {
+            formatters[clazz] = formatter
+        }
+
+        fun <V> putFormatter(function: (Class<in V>) -> Formatter<V>?) {
+            dynamicFormatter.add(function as ((Class<*>) -> Formatter<*>))
+        }
+
+        init {
+            putFormatter(
+                java.lang.Integer.TYPE
+            ) { subject, printer -> printer.emitValue(subject.toString()) }
+            putFormatter(
+                java.lang.Integer::class.java
+            ) { subject, printer -> printer.emitValue(subject.toString()) }
+            putFormatter(
+                String::class.java
+            ) { subject, printer -> printer.emitValue(subject) }
+            putFormatter(
+                ItemStack::class.java
+            ) { subject, printer -> printer.emitValue("${subject.count}x${subject.name.string}§r") }
+            putFormatter {
+                if (Int2ObjectMap::class.java.isAssignableFrom(it)) {
+                    return@putFormatter object : Formatter<Int2ObjectMap<*>> {
+                        override fun prettyPrint(subject: Int2ObjectMap<*>, printer: Printer) {
+                            val child = printer.beginObject("Int2ObjectMap (length=${subject.size})")
+                            subject.forEach { (k, v) ->
+                                val valueFormatter = getPrettyPrinter(v.javaClass)
+                                child.emitName(k.toString())
+                                valueFormatter.prettyPrint(v, child)
+                            }
+                        }
+                    }
+                }
+                return@putFormatter null
+            }
+        }
+
+        class LazyFormatter<T>(val clazz: Class<T>) : Formatter<T> {
+            override fun prettyPrint(subject: T, printer: Printer) {
+                (formatters[clazz] as Formatter<T>).prettyPrint(subject, printer)
+            }
+        }
+
+        fun prettyPrintPacket(packet: Packet<*>): Text {
+            val sb = StringBuilder()
+            getPrettyPrinter(packet.javaClass).prettyPrint(packet, AccumulatingPrinter(0, sb, false))
+            return Text.literal(sb.toString())
+        }
+
+        fun <T> getPrettyPrinter(clazz: Class<T>): Formatter<T> {
+            if (clazz in processing) {
+                return LazyFormatter(clazz)
+            }
+            if (clazz.isEnum) {
+                return object : Formatter<T> {
+                    override fun prettyPrint(subject: T, printer: Printer) {
+                        printer.emitValue(subject.toString())
+                    }
+                }
+            }
+            return formatters.getOrPut(clazz) {
+                try {
+                    processing.add(clazz)
+
+                    val dynamic = dynamicFormatter.firstNotNullOfOrNull { dynamic -> dynamic(clazz) }
+                    if (dynamic != null) {
+                        return@getOrPut dynamic
+                    }
+
+                    val fields = clazz.declaredFields
+                        .filter { !it.isStatic }
+                        .onEach { it.isAccessible = true }
+                        .associateWith { getPrettyPrinter(it.type) }
+                    val name = clazz.simpleName // TODO: remapping
+                    object : Formatter<T> {
+                        override fun prettyPrint(subject: T, printer: Printer) {
+                            val child = printer.beginObject(name)
+                            fun <V> printField(value: V, formatter: Formatter<V>) {
+                                formatter.prettyPrint(value, child)
+                            }
+                            for ((field, fieldFormatter) in fields) {
+                                val value = field.get(subject)
+                                child.emitName(field.name) // TODO: remapping
+                                // We love `Nothing` being unable to be cast away
+                                printField(value as Any, fieldFormatter as Formatter<Any>)
+                            }
+                        }
+                    }
+                } finally {
+                    processing.remove(clazz)
+                }
+            } as Formatter<T>
+        }
+
+    }
+}
+
diff --git a/src/main/kotlin/com/walkerselby/wheelchair/client/Wheelchair.kt b/src/main/kotlin/com/walkerselby/wheelchair/client/Wheelchair.kt
new file mode 100644
index 0000000..1970f5c
--- /dev/null
+++ b/src/main/kotlin/com/walkerselby/wheelchair/client/Wheelchair.kt
@@ -0,0 +1,45 @@
+package com.walkerselby.wheelchair.client
+
+import it.unimi.dsi.fastutil.ints.Int2ObjectMaps
+import net.fabricmc.api.ClientModInitializer
+import net.fabricmc.fabric.api.client.command.v2.ClientCommandManager.literal
+import net.fabricmc.fabric.api.client.command.v2.ClientCommandRegistrationCallback
+import net.minecraft.item.ItemStack
+import net.minecraft.item.Items
+import net.minecraft.network.packet.c2s.play.ClickSlotC2SPacket
+import net.minecraft.screen.slot.SlotActionType
+import net.minecraft.text.Text
+
+
+class Wheelchair : ClientModInitializer {
+    override fun onInitializeClient() {
+
+        ClientCommandRegistrationCallback.EVENT.register(ClientCommandRegistrationCallback { dispatcher, registryAccess ->
+            dispatcher.register(
+                literal("wheelchair")
+                    .then(
+                        literal("packet")
+                            .executes {
+                                val packet = ClickSlotC2SPacket(
+                                    0,
+                                    1,
+                                    2,
+                                    3,
+                                    SlotActionType.SWAP,
+                                    ItemStack(Items.IRON_HOE),
+                                    Int2ObjectMaps.emptyMap()
+                                )
+                                try {
+                                    it.source.sendFeedback(Formatter.prettyPrintPacket(packet))
+                                } catch (e: Exception) {
+                                    e.printStackTrace()
+                                    it.source.sendFeedback(Text.literal("Excepted"))
+                                }
+                                return@executes 0
+                            }
+                    )
+            )
+        })
+
+    }
+}
\ No newline at end of file
diff --git a/src/main/resources/fabric.mod.json b/src/main/resources/fabric.mod.json
new file mode 100644
index 0000000..366f55c
--- /dev/null
+++ b/src/main/resources/fabric.mod.json
@@ -0,0 +1,13 @@
+{
+  "schemaVersion": 1,
+  "id": "wheelchair",
+  "name": "Wheelchair",
+  "description": "Walkers Utilities for Minecraft",
+  "version": "1.0.0",
+  "authors": [
+    "Walkers"
+  ],
+  "entrypoints": {
+    "client": ["com.walkerselby.wheelchair.client.Wheelchair"]
+  }
+}
\ No newline at end of file