Adding attributes is working, remove and list doesn't

build.gradle.kts

@@ -1,64 +1,111 @@
+import xyz.jpenilla.runpaper.task.RunServer
+
 plugins {
     id("java")
-    id("com.github.johnrengelman.shadow") version "8.1.1"
+    id("io.github.goooler.shadow") version "8.1.7"
+    id("io.papermc.paperweight.userdev") version "1.7.1"
+    id("xyz.jpenilla.run-paper") version "2.3.0"
+    id("net.minecrell.plugin-yml.bukkit") version "0.6.0"
 }
 
 group = "dev.plex"
-version = "2.1"
-
-subprojects {
-    apply(plugin = "java")
-    apply(plugin = "com.github.johnrengelman.shadow")
-    java.sourceCompatibility = JavaVersion.VERSION_17
+version = "2.3"
 
+allprojects {
     repositories {
         mavenCentral()
 
-        maven {
-            url = uri("https://repo.codemc.org/repository/nms/")
-        }
-
         maven {
             url = uri("https://repo.papermc.io/repository/maven-public/")
         }
 
         maven {
             url = uri("https://maven.playpro.com/")
+            content {
+                includeGroup("net.coreprotect")
+            }
         }
     }
+}
+
+subprojects {
+    apply(plugin = "java")
+    apply(plugin = "io.github.goooler.shadow")
+    apply(plugin = "io.papermc.paperweight.userdev")
 
     dependencies {
         if (project.name != "shared") {
             implementation(project(":shared"))
         }
+    }
 
-        compileOnly("net.coreprotect:coreprotect:21.3")
+    tasks {
+        assemble {
+            dependsOn("reobfJar")
+        }
     }
 }
 
-tasks {
-    shadowJar {
-        archiveBaseName.set("ItemizerX")
-        archiveClassifier.set("")
-        archiveVersion.set("")
+java {
+    toolchain.languageVersion.set(JavaLanguageVersion.of(21))
+}
+
+bukkit {
+    name = "ItemizerX"
+    version = rootProject.version.toString()
+    description = "A new way to edit your items"
+    authors = listOf("Focusvity", "Telesphoreo")
+    main = "dev.plex.itemizerx.ItemizerX"
+    apiVersion = "1.19"
+    foliaSupported = true
+    softDepend = listOf("CoreProtect")
+    commands {
+        register("itemizer") {
+            description = "The main command for ItemizerX"
+            aliases = listOf("ii", "it")
+            usage = "/<command>"
+        }
     }
-    assemble {
-        dependsOn("shadowJar")
+}
+
+// Adapted from PlotSquared
+val supportedVersions =
+        listOf("1.20.2", "1.20.4", "1.20.6", "1.21")
+tasks {
+    supportedVersions.forEach {
+        register<RunServer>("runServer-$it") {
+            minecraftVersion(it)
+            pluginJars(layout.buildDirectory.file("libs/ItemizerX-${rootProject.version}.jar"))
+            jvmArgs("-DPaper.IgnoreJavaVersion=true", "-Dcom.mojang.eula.agree=true")
+            group = "run paper"
+            runDirectory.set(file("run-$it"))
+        }
     }
 
-    jar {
-        enabled = false
+    assemble {
+        dependsOn("shadowJar")
+        dependsOn("reobfJar")
+    }
+
+    compileJava {
+        options.encoding = Charsets.UTF_8.name()
+        options.release.set(21)
+    }
+
+    shadowJar {
+        relocate("org.bstats", "dev.plex.metrics")
     }
 }
 
 dependencies {
-    implementation(project(path = ":core", configuration = "shadow"))
+    paperweight.paperDevBundle("1.20.6-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.20.6-R0.1-SNAPSHOT")
+    compileOnly("net.coreprotect:coreprotect:22.4")
+    implementation("org.bstats:bstats-base:3.0.2")
+    implementation("org.bstats:bstats-bukkit:3.0.2")
     implementation(project(path = ":shared", configuration = "shadow"))
-    implementation(project(path = ":v1_20_R1", configuration = "shadow"))
-    implementation(project(path = ":v1_19_R3", configuration = "shadow"))
-    implementation(project(path = ":v1_19_R2", configuration = "shadow"))
-    implementation(project(path = ":v1_19_R1", configuration = "shadow"))
-    implementation(project(path = ":v1_18_R2", configuration = "shadow"))
-    implementation(project(path = ":v1_18_R1", configuration = "shadow"))
-    implementation(project(path = ":v1_17_R1", configuration = "shadow"))
+    //implementation(project(path = ":v1_21_R1", configuration = "shadow"))
+    implementation(project(path = ":v1_20_R4", configuration = "shadow"))
+    implementation(project(path = ":v1_20_R3", configuration = "shadow"))
+    implementation(project(path = ":v1_20_R2", configuration = "shadow"))
 }

core/build.gradle.kts

@@ -1,11 +0,0 @@
-dependencies {
-    implementation(project(":shared"))
-    implementation(project(":v1_20_R1"))
-    implementation(project(":v1_19_R3"))
-    implementation(project(":v1_19_R2"))
-    implementation(project(":v1_19_R1"))
-    implementation(project(":v1_18_R2"))
-    implementation(project(":v1_18_R1"))
-    implementation(project(":v1_17_R1"))
-    compileOnly("io.papermc.paper:paper-api:1.20.1-R0.1-SNAPSHOT")
-}

core/src/main/java/dev/plex/itemizerx/ItemizerX.java

@@ -1,68 +0,0 @@
-package dev.plex.itemizerx;
-
-import org.bukkit.plugin.java.JavaPlugin;
-
-public class ItemizerX extends JavaPlugin {
-
-    public static ItemizerX plugin;
-    CoreProtectBridge cpb = new CoreProtectBridge();
-    IAttributeManager attr;
-
-    @Override
-    public void onLoad() {
-        plugin = this;
-    }
-
-    @Override
-    public void onEnable() {
-        plugin = this;
-        cpb.getCoreProtect();
-        getCommand("itemizer").setExecutor(new ItemizerXCommand());
-        getCommand("itemizer").setTabCompleter(new ItemizerXTab());
-        switch (getNMSVersion()) {
-            case "v1_20_R1": {
-                attr = new dev.plex.itemizerx.v1_20_R1.AttributeManager();
-                return;
-            }
-            case "v1_19_R3": {
-                attr = new dev.plex.itemizerx.v1_19_R3.AttributeManager();
-                return;
-            }
-            case "v1_19_R2": {
-                attr = new dev.plex.itemizerx.v1_19_R2.AttributeManager();
-                return;
-            }
-            case "v1_19_R1": {
-                attr = new dev.plex.itemizerx.v1_19_R1.AttributeManager();
-                return;
-            }
-            case "v1_18_R2": {
-                attr = new dev.plex.itemizerx.v1_18_R2.AttributeManager();
-                return;
-            }
-            case "v1_18_R1": {
-                attr = new dev.plex.itemizerx.v1_18_R1.AttributeManager();
-                return;
-            }
-            case "v1_17_R1": {
-                attr = new dev.plex.itemizerx.v1_17_R1.AttributeManager();
-                return;
-            }
-            default: {
-                getLogger().severe("You are trying to run ItemizerX on an incompatible server version.");
-                getLogger().severe("ItemizerX only supports versions 1.17 to 1.20.1, disabling plugin.");
-                getServer().getPluginManager().disablePlugin(this);
-            }
-        }
-    }
-
-    public String getNMSVersion() {
-        String v = getServer().getClass().getPackage().getName();
-        return v.substring(v.lastIndexOf('.') + 1);
-    }
-
-    @Override
-    public void onDisable() {
-        plugin = null;
-    }
-}

core/src/main/resources/plugin.yml

@@ -1,14 +0,0 @@
-name: ItemizerX
-version: 2.1
-api-version: 1.17
-description: A rewrite of Itemizer
-author: Focusvity, Telesphoreo
-main: dev.plex.itemizerx.ItemizerX
-folia-supported: true
-softdepend:
-  - CoreProtect
-commands:
-  itemizer:
-    description: The main command for ItemizerX
-    usage: /<command>
-    aliases: [ii, it]

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.1.1-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
 networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -83,10 +83,8 @@ done
 # This is normally unused
 # shellcheck disable=SC2034
 APP_BASE_NAME=${0##*/}
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
-
-# 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"'
+# 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
@@ -133,10 +131,13 @@ 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.
+    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.
@@ -144,7 +145,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
         # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
@@ -152,7 +153,7 @@ if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
       '' | soft) :;; #(
       *)
         # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
-        # shellcheck disable=SC3045
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -197,11 +198,15 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# 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.
+
+# 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, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \

gradlew.bat

@@ -1,92 +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
+@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

settings.gradle.kts

@@ -1,12 +1,10 @@
+plugins {
+    id("org.gradle.toolchains.foojay-resolver-convention") version ("0.8.0")
+}
+
 rootProject.name = "ItemizerX"
-include("core")
 include("shared")
-include("v1_20_R1")
-include("v1_19_R3")
-include("v1_19_R2")
-include("v1_19_R1")
-include("v1_18_R2")
-include("v1_18_R1")
-include("v1_17_R1")
-
-
+//include("v1_21_R1")
+include("v1_20_R4")
+include("v1_20_R3")
+include("v1_20_R2")

shared/build.gradle.kts

@@ -1,4 +1,5 @@
 dependencies {
-    compileOnly("io.papermc.paper:paper-api:1.20.1-R0.1-SNAPSHOT")
-    compileOnly("org.spigotmc:spigot:1.20.1-R0.1-SNAPSHOT")
+    compileOnly("io.papermc.paper:paper-api:1.20.2-R0.1-SNAPSHOT")
+    paperweight.paperDevBundle("1.20.2-R0.1-SNAPSHOT")
+    compileOnly("net.coreprotect:coreprotect:22.2")
 }

shared/src/main/java/dev/plex/itemizerx/Attributes.java

@@ -5,17 +5,18 @@ import org.apache.commons.lang3.StringUtils;
 import java.util.ArrayList;
 import java.util.List;
 
-public enum Attributes {
-
+public enum Attributes
+{
     MAX_HEALTH("generic.max_health", 0),
     FOLLOW_RANGE("generic.follow_range", 1),
     KNOCKBACK_RESISTANCE("generic.knockback_resistance", 1),
     MOVEMENT_SPEED("generic.movement_speed", 1),
+    FLYING_SPEED("generic.flying_speed", 1),
     DAMAGE("generic.attack_damage", 0),
+    ATTACK_KNOCKBACK("generic.attack_knockback", 0),
+    ATTACK_SPEED("generic.attack_speed", 1),
     ARMOR("generic.armor", 0),
     ARMOR_TOUGHNESS("generic.armor_toughness", 0),
-    FLYING_SPEED("generic.flying_speed", 1),
-    ATTACK_SPEED("generic.attack_speed", 1),
     LUCK("generic.luck", 0),
     HORSE_JUMP("horse.jump_strength", 1),
     ZOMBIE_REINFORCEMENTS("zombie.spawn_reinforcements", 1);
@@ -23,27 +24,34 @@ public enum Attributes {
     public final String mcName;
     public final int op;
 
-    Attributes(String mcName, int op) {
+    Attributes(String mcName, int op)
+    {
         this.mcName = mcName;
         this.op = op;
     }
 
-    public static Attributes get(String name) {
-        for (Attributes attr : values()) {
-            if (attr.name().equalsIgnoreCase(name) || attr.mcName.equalsIgnoreCase(name)) {
+    public static Attributes get(String name)
+    {
+        for (Attributes attr : values())
+        {
+            if (attr.name().equalsIgnoreCase(name) || attr.mcName.equalsIgnoreCase(name.replace("minecraft:", "")))
+            {
                 return attr;
             }
         }
         return null;
     }
 
-    public static String getAttributes() {
+    public static String getAttributes()
+    {
         return StringUtils.join(values(), ", ");
     }
 
-    public static List<String> getAttributeList() {
+    public static List<String> getAttributeList()
+    {
         List<String> attributes = new ArrayList<>();
-        for (Attributes attr : values()) {
+        for (Attributes attr : values())
+        {
             attributes.add(attr.name());
         }
         return attributes;

shared/src/main/java/dev/plex/itemizerx/CoreProtectBridge.java

@@ -5,40 +5,55 @@ import net.coreprotect.CoreProtectAPI;
 import org.bukkit.Bukkit;
 import org.bukkit.plugin.Plugin;
 
-public class CoreProtectBridge {
+public class CoreProtectBridge
+{
 
     public static CoreProtect cp = null;
     public static CoreProtectAPI api = null;
     public static boolean logged = false;
 
-    public CoreProtect getCoreProtect() {
-        try {
+    public CoreProtect getCoreProtect()
+    {
+        try
+        {
             final Plugin pl = Bukkit.getPluginManager().getPlugin("CoreProtect");
-            if (pl instanceof CoreProtect) {
+            if (pl instanceof CoreProtect)
+            {
                 cp = (CoreProtect) pl;
-            } else {
-                if (!logged) { // To stop the console log spam - not persistent on server restarts
+            }
+            else
+            {
+                if (!logged)
+                { // To stop the console log spam - not persistent on server restarts
                     Bukkit.getLogger().info("CoreProtect not detected, some features will not be logged!");
                     logged = true;
                 }
             }
-        } catch (Exception ex) {
+        }
+        catch (Exception ex)
+        {
             ex.printStackTrace();
         }
         return cp;
     }
 
-    public CoreProtectAPI getAPI() {
+    public CoreProtectAPI getAPI()
+    {
         final CoreProtect cp = getCoreProtect();
 
-        if (cp != null && api == null) {
-            try {
+        if (cp != null && api == null)
+        {
+            try
+            {
                 api = cp.getAPI();
-                if (!cp.isEnabled() || !api.isEnabled()) {
+                if (!cp.isEnabled() || !api.isEnabled())
+                {
                     Bukkit.getLogger().info("CoreProtect is disabled, some features will not be logged!");
                     return null;
                 }
-            } catch (Exception ex) {
+            }
+            catch (Exception ex)
+            {
                 ex.printStackTrace();
             }
         }

shared/src/main/java/dev/plex/itemizerx/IAttributeManager.java

@@ -1,17 +1,28 @@
 package dev.plex.itemizerx;
 
-import net.minecraft.nbt.NBTTagList;
+import java.util.Collections;
+import java.util.List;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.world.entity.ai.attributes.AttributeModifier;
+import net.minecraft.world.item.Item;
 import net.minecraft.world.item.ItemStack;
 import org.bukkit.entity.Player;
 
-public interface IAttributeManager {
-    NBTTagList getAttrList(final ItemStack item);
+public interface IAttributeManager
+{
+    default ListTag getAttrList(final ItemStack item)
+    {
+        return null;
+    }
+
+    default List<AttributeModifier> getAttrList(final Item item)
+    {
+        return Collections.emptyList();
+    }
 
     void addAttr(final Player player, final String[] args);
 
     void removeAttr(final Player player, final String string);
 
     void listAttr(final Player player);
-
-    String colorize(String string);
 }

src/main/java/dev/plex/itemizerx/ItemizerX.java

@@ -0,0 +1,68 @@
+package dev.plex.itemizerx;
+
+import org.bstats.bukkit.Metrics;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class ItemizerX extends JavaPlugin
+{
+    public static ItemizerX plugin;
+    CoreProtectBridge cpb = new CoreProtectBridge();
+    IAttributeManager attr;
+
+    @Override
+    public void onLoad()
+    {
+        plugin = this;
+    }
+
+    @Override
+    public void onEnable()
+    {
+        plugin = this;
+        // Metrics at https://bstats.org/plugin/bukkit/ItemizerX/19104
+        new Metrics(this, 19104);
+        cpb.getCoreProtect();
+        getCommand("itemizer").setTabCompleter(new ItemizerXTab());
+        switch (getServerVersion())
+        {
+            /*case "1.21" ->
+            {
+                getCommand("itemizer").setExecutor(new ItemizerXCommand());
+                attr = new dev.plex.itemizerx.v1_21_R1.AttributeManager();
+            }*/
+            case "1.20.5", "1.20.6" ->
+            {
+                getCommand("itemizer").setExecutor(new ItemizerXCommand());
+                attr = new dev.plex.itemizerx.v1_20_R4.AttributeManager();
+            }
+            case "1.20.4" ->
+            {
+                getCommand("itemizer").setExecutor(new ItemizerXCommand());
+                attr = new dev.plex.itemizerx.v1_20_R3.AttributeManager();
+            }
+            case "1.20.3", "1.20.2" ->
+            {
+                getCommand("itemizer").setExecutor(new ItemizerXCommand());
+                attr = new dev.plex.itemizerx.v1_20_R2.AttributeManager();
+            }
+            default ->
+            {
+                getLogger().severe("You are trying to run ItemizerX on an incompatible server version.");
+                getLogger().severe("ItemizerX only supports versions 1.20.2 to 1.21, disabling plugin.");
+                getServer().getPluginManager().disablePlugin(this);
+            }
+        }
+    }
+
+    public String getServerVersion()
+    {
+        return Bukkit.getServer().getMinecraftVersion();
+    }
+
+    @Override
+    public void onDisable()
+    {
+        plugin = null;
+    }
+}

src/main/java/dev/plex/itemizerx/ItemizerXBase.java

@@ -1,5 +1,6 @@
 package dev.plex.itemizerx;
 
-public interface ItemizerXBase {
+public interface ItemizerXBase
+{
     ItemizerX plugin = ItemizerX.plugin;
 }

src/main/java/dev/plex/itemizerx/ItemizerXTab.java

@@ -13,88 +13,116 @@ import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
-public class ItemizerXTab implements TabCompleter {
-
+public class ItemizerXTab implements TabCompleter
+{
     @Override
-    public List<String> onTabComplete(CommandSender sender, Command cmd, String string, String[] args) {
-        if (args.length == 1) {
+    public List<String> onTabComplete(CommandSender sender, Command cmd, String string, String[] args)
+    {
+        if (args.length == 1)
+        {
             return Arrays.asList("help", "id", "lore", "potion", "attr", "flag", "enchant", "title", "author",
                     "head", "sign", "clearall");
         }
 
-        if (args.length == 2) {
-            switch (args[0]) {
-                case "id": {
+        if (args.length == 2)
+        {
+            switch (args[0])
+            {
+                case "id":
+                {
                     List<String> materials = new ArrayList<>();
-                    for (Material material : Material.values()) {
+                    for (Material material : Material.values())
+                    {
                         materials.add(material.name());
                     }
                     return materials;
                 }
-                case "lore": {
+                case "lore":
+                {
                     return Arrays.asList("add", "remove", "change", "clear");
                 }
-                case "potion": {
+                case "potion":
+                {
                     return Arrays.asList("add", "remove", "change", "color", "list");
                 }
                 case "attr":
                 case "flag":
-                case "enchant": {
+                case "enchant":
+                {
                     return Arrays.asList("add", "remove", "list", "listall");
                 }
-                default: {
+                default:
+                {
                     return Collections.emptyList();
                 }
             }
         }
 
-        if (args.length == 3) {
-            switch (args[0]) {
-                case "potion": {
-                    switch (args[1]) {
+        if (args.length == 3)
+        {
+            switch (args[0])
+            {
+                case "potion":
+                {
+                    switch (args[1])
+                    {
                         case "add":
-                        case "remove": {
+                        case "remove":
+                        {
                             List<String> potions = new ArrayList<>();
-                            for (PotionEffectType effect : PotionEffectType.values()) {
+                            for (PotionEffectType effect : PotionEffectType.values())
+                            {
                                 potions.add(effect.getName());
                             }
                             return potions;
                         }
                     }
                 }
-                case "attr": {
-                    switch (args[1]) {
+                case "attr":
+                {
+                    switch (args[1])
+                    {
                         case "add":
-                        case "remove": {
+                        case "remove":
+                        {
                             return Attributes.getAttributeList();
                         }
                     }
                 }
-                case "flag": {
-                    switch (args[1]) {
+                case "flag":
+                {
+                    switch (args[1])
+                    {
                         case "add":
-                        case "remove": {
+                        case "remove":
+                        {
                             List<String> flags = new ArrayList<>();
-                            for (ItemFlag flag : ItemFlag.values()) {
+                            for (ItemFlag flag : ItemFlag.values())
+                            {
                                 flags.add(flag.name());
                             }
                             return flags;
                         }
                     }
                 }
-                case "enchant": {
-                    switch (args[1]) {
+                case "enchant":
+                {
+                    switch (args[1])
+                    {
                         case "add":
-                        case "remove": {
+                        case "remove":
+                        {
                             List<String> enchantments = new ArrayList<>();
-                            for (Enchantment enchantment : Enchantment.values()) {
+                            for (Enchantment enchantment : Enchantment.values())
+                            {
                                 enchantments.add(enchantment.getKey().getKey());
                             }
                             return enchantments;
                         }
                     }
                 }
-                default: {
+                default:
+                {
                     return Collections.emptyList();
                 }
             }

v1_17_R1/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_17_R1/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.17.1-R0.1-SNAPSHOT")
-}

v1_17_R1/src/main/java/dev/plex/itemizerx/v1_17_R1/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_17_R1;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_17_R1.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.getOrCreateTag().getList("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.getTag().set("AttributeModifiers", new NBTTagList());
-        }
-        return item.getTag().getList("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.getString("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.setString("Name", args[2]);
-        c.setString("AttributeName", a.mcName);
-        c.setDouble("Amount", amount);
-        op = a.op;
-        c.setInt("Operation", op);
-        final Random random = new Random();
-        c.setIntArray("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.setString("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.getTag().set("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.getString("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.getTag().set("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.getString("AttributeName")).mcName
-                    + ", " + c.getDouble("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_18_R1/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_18_R1/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.18.1-R0.1-SNAPSHOT")
-}

v1_18_R1/src/main/java/dev/plex/itemizerx/v1_18_R1/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_18_R1;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_18_R1.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.t().c("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.t().a("AttributeModifiers", new NBTTagList());
-        }
-        return item.t().c("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.l("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.a("Name", args[2]);
-        c.a("AttributeName", a.mcName);
-        c.a("Amount", amount);
-        op = a.op;
-        c.a("Operation", op);
-        final Random random = new Random();
-        c.a("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.a("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.t().a("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.l("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.t().a("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.l("AttributeName")).mcName
-                    + ", " + c.k("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_18_R2/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_18_R2/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.18.2-R0.1-SNAPSHOT")
-}

v1_18_R2/src/main/java/dev/plex/itemizerx/v1_18_R2/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_18_R2;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_18_R2.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.u().c("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.u().a("AttributeModifiers", new NBTTagList());
-        }
-        return item.u().c("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.l("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.a("Name", args[2]);
-        c.a("AttributeName", a.mcName);
-        c.a("Amount", amount);
-        op = a.op;
-        c.a("Operation", op);
-        final Random random = new Random();
-        c.a("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.a("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.u().a("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.l("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.u().a("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.l("AttributeName")).mcName
-                    + ", " + c.k("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_19_R1/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_19_R1/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.19.2-R0.1-SNAPSHOT")
-}

v1_19_R1/src/main/java/dev/plex/itemizerx/v1_19_R1/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_19_R1;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_19_R1.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.v().c("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.u().a("AttributeModifiers", new NBTTagList());
-        }
-        return item.u().c("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.l("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.a("Name", args[2]);
-        c.a("AttributeName", a.mcName);
-        c.a("Amount", amount);
-        op = a.op;
-        c.a("Operation", op);
-        final Random random = new Random();
-        c.a("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.a("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.u().a("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.l("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.u().a("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.l("AttributeName")).mcName
-                    + ", " + c.k("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_19_R2/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_19_R2/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.19.3-R0.1-SNAPSHOT")
-}

v1_19_R2/src/main/java/dev/plex/itemizerx/v1_19_R2/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_19_R2;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_19_R2.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.v().c("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.u().a("AttributeModifiers", new NBTTagList());
-        }
-        return item.u().c("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.l("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.a("Name", args[2]);
-        c.a("AttributeName", a.mcName);
-        c.a("Amount", amount);
-        op = a.op;
-        c.a("Operation", op);
-        final Random random = new Random();
-        c.a("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.a("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.u().a("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.l("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.u().a("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.l("AttributeName")).mcName
-                    + ", " + c.k("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_19_R3/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_19_R3/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.19.4-R0.1-SNAPSHOT")
-}

v1_19_R3/src/main/java/dev/plex/itemizerx/v1_19_R3/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_19_R3;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_19_R3.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.v().c("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.u().a("AttributeModifiers", new NBTTagList());
-        }
-        return item.u().c("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.l("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.a("Name", args[2]);
-        c.a("AttributeName", a.mcName);
-        c.a("Amount", amount);
-        op = a.op;
-        c.a("Operation", op);
-        final Random random = new Random();
-        c.a("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.a("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.u().a("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.l("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.u().a("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.l("AttributeName")).mcName
-                    + ", " + c.k("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_20_R1/.gitignore

@@ -1,42 +0,0 @@
-.gradle
-build/
-!gradle/wrapper/gradle-wrapper.jar
-!**/src/main/**/build/
-!**/src/test/**/build/
-
-### IntelliJ IDEA ###
-.idea/modules.xml
-.idea/jarRepositories.xml
-.idea/compiler.xml
-.idea/libraries/
-*.iws
-*.iml
-*.ipr
-out/
-!**/src/main/**/out/
-!**/src/test/**/out/
-
-### Eclipse ###
-.apt_generated
-.classpath
-.factorypath
-.project
-.settings
-.springBeans
-.sts4-cache
-bin/
-!**/src/main/**/bin/
-!**/src/test/**/bin/
-
-### NetBeans ###
-/nbproject/private/
-/nbbuild/
-/dist/
-/nbdist/
-/.nb-gradle/
-
-### VS Code ###
-.vscode/
-
-### Mac OS ###
-.DS_Store

v1_20_R1/build.gradle.kts

@@ -1,3 +0,0 @@
-dependencies {
-    compileOnly("org.spigotmc:spigot:1.20.1-R0.1-SNAPSHOT")
-}

v1_20_R1/src/main/java/dev/plex/itemizerx/v1_20_R1/AttributeManager.java

@@ -1,141 +0,0 @@
-package dev.plex.itemizerx.v1_20_R1;
-
-import dev.plex.itemizerx.Attributes;
-import dev.plex.itemizerx.IAttributeManager;
-import net.minecraft.nbt.NBTTagCompound;
-import net.minecraft.nbt.NBTTagList;
-import net.minecraft.world.item.ItemStack;
-import org.apache.commons.lang.StringUtils;
-import org.bukkit.ChatColor;
-import org.bukkit.craftbukkit.v1_20_R1.inventory.CraftItemStack;
-import org.bukkit.entity.Player;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.Random;
-
-public class AttributeManager implements IAttributeManager {
-
-    @Override
-    public NBTTagList getAttrList(final ItemStack item) {
-        NBTTagList attrmod = item.w().c("AttributeModifiers", 10);
-        if (attrmod == null) {
-            item.v().a("AttributeModifiers", new NBTTagList());
-        }
-        return item.v().c("AttributeModifiers", 10);
-    }
-
-    @Override
-    public void addAttr(final Player player, final String[] args) {
-        int op;
-        if (args.length < 4) {
-            player.sendMessage(colorize("&b/itemizer attr add <&fname&b> <&fstrength&b> [&fslot&b] &c- "
-                    + "&6Add an attribute"));
-            return;
-        }
-        final Attributes a = Attributes.get(args[2]);
-        if (a == null) {
-            player.sendMessage(colorize("&4\"" + args[2] + "\" is not a valid attribute type."));
-            return;
-        }
-        double amount;
-        try {
-            amount = Double.parseDouble(args[3]);
-        } catch (NumberFormatException ex) {
-            player.sendMessage(colorize("&4\"" + args[3] + "\" is not a valid number."));
-            return;
-        }
-        if (Double.isNaN(amount)) {
-            player.sendMessage(colorize("&4Please do not use &f'NaN (Not a Number)'"));
-            return;
-        }
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (c.l("Name").equals(args[2])) {
-                player.sendMessage(colorize("&4An attribute with the name \"&f" + args[2] + "&4\" already exists!"));
-                return;
-            }
-        }
-        final NBTTagCompound c = new NBTTagCompound();
-        c.a("Name", args[2]);
-        c.a("AttributeName", a.mcName);
-        c.a("Amount", amount);
-        op = a.op;
-        c.a("Operation", op);
-        final Random random = new Random();
-        c.a("UUID", new int[]
-                {
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt(),
-                        random.nextInt()
-                });
-        if (args.length == 5) {
-            final List<String> options = new ArrayList<>();
-            options.add("mainhand");
-            options.add("offhand");
-            options.add("head");
-            options.add("chest");
-            options.add("legs");
-            options.add("feet");
-            if (!options.contains(args[4].toLowerCase())) {
-                player.sendMessage(colorize("&2Supported options:\n"
-                        + "&e" + StringUtils.join(options, ", ")));
-                return;
-            }
-            c.a("Slot", args[4].toLowerCase());
-        }
-        attrmod.add(c);
-        nms.v().a("AttributeModifiers", attrmod);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute added!"));
-    }
-
-    @Override
-    public void removeAttr(final Player player, final String string) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        final NBTTagList newList = new NBTTagList();
-        boolean r = false;
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            if (!c.l("Name").equals(string)) {
-                newList.add(nbtBase);
-            } else {
-                r = true;
-            }
-        }
-        if (!r) {
-            player.sendMessage(colorize("&4The attribute \"" + string + "\" doesn't exist!"));
-            return;
-        }
-        nms.v().a("AttributeModifiers", newList);
-        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
-        player.getInventory().setItemInMainHand(is);
-        player.sendMessage(colorize("&2Attribute removed!"));
-    }
-
-    @Override
-    public void listAttr(final Player player) {
-        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
-        final NBTTagList attrmod = getAttrList(nms);
-        if (attrmod.size() == 0) {
-            player.sendMessage(colorize("&eThis item has no attributes."));
-            return;
-        }
-        player.sendMessage(colorize("&2Item attributes: "));
-        for (net.minecraft.nbt.NBTBase nbtBase : attrmod) {
-            final NBTTagCompound c = (NBTTagCompound) nbtBase;
-            player.sendMessage(colorize("&e" + Attributes.get(c.l("AttributeName")).mcName
-                    + ", " + c.k("Amount")));
-        }
-    }
-
-    @Override
-    public String colorize(String string) {
-        return ChatColor.translateAlternateColorCodes('&', string);
-    }
-}

v1_20_R2/build.gradle.kts

@@ -0,0 +1,3 @@
+dependencies {
+    paperweight.paperDevBundle("1.20.2-R0.1-SNAPSHOT")
+}

v1_20_R2/src/main/java/dev/plex/itemizerx/v1_20_R2/AttributeManager.java

@@ -0,0 +1,161 @@
+package dev.plex.itemizerx.v1_20_R2;
+
+import dev.plex.itemizerx.Attributes;
+import dev.plex.itemizerx.IAttributeManager;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.nbt.Tag;
+import net.minecraft.world.item.ItemStack;
+import org.apache.commons.lang3.StringUtils;
+import org.bukkit.craftbukkit.v1_20_R2.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class AttributeManager implements IAttributeManager
+{
+    private final MiniMessage mm = MiniMessage.miniMessage();
+
+    @Override
+    public ListTag getAttrList(final ItemStack item)
+    {
+        ListTag attrmod = item.getOrCreateTag().getList("AttributeModifiers", 10);
+        if (attrmod == null)
+        {
+            item.getTag().put("AttributeModifiers", new CompoundTag());
+        }
+        return item.getTag().getList("AttributeModifiers", 10);
+    }
+
+    @Override
+    public void addAttr(final Player player, final String[] args)
+    {
+        int op;
+        if (args.length < 4)
+        {
+            player.sendMessage(mm.deserialize("<aqua>/itemizer attr add <<white>name<aqua>> <<white>strength<aqua>>" +
+                    "[<white>slot<aqua>] <red>- <gold>Add an attribute"));
+            return;
+        }
+        final Attributes a = Attributes.get(args[2]);
+        if (a == null)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>\"" + args[2] + "\" is not a valid attribute type."));
+            return;
+        }
+        double amount;
+        try
+        {
+            amount = Double.parseDouble(args[3]);
+        }
+        catch (NumberFormatException ex)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>\"" + args[3] + "\" is not a valid number."));
+            return;
+        }
+        if (Double.isNaN(amount))
+        {
+            player.sendMessage(mm.deserialize("<dark_red>Please do not use <white>'NaN (Not a Number)'"));
+            return;
+        }
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            if (c.getString("Name").equals(args[2]))
+            {
+                player.sendMessage(mm.deserialize("<dark_red>An attribute with the name \"<white>" + args[2] + "<dark_red>\" already exists!"));
+                return;
+            }
+        }
+        final CompoundTag c = new CompoundTag();
+        c.putString("Name", args[2]);
+        c.putString("AttributeName", a.mcName);
+        c.putDouble("Amount", amount);
+        op = a.op;
+        c.putInt("Operation", op);
+        final Random random = new Random();
+        c.putIntArray("UUID", new int[]
+                {
+                        random.nextInt(),
+                        random.nextInt(),
+                        random.nextInt(),
+                        random.nextInt()
+                });
+        if (args.length == 5)
+        {
+            final List<String> options = new ArrayList<>();
+            options.add("mainhand");
+            options.add("offhand");
+            options.add("head");
+            options.add("chest");
+            options.add("legs");
+            options.add("feet");
+            if (!options.contains(args[4].toLowerCase()))
+            {
+                player.sendMessage(mm.deserialize("<dark_green>Supported options:"));
+                player.sendMessage(mm.deserialize("<yellow>" + StringUtils.join(options, ", ")));
+                return;
+            }
+            c.putString("Slot", args[4].toLowerCase());
+        }
+        attrmod.add(c);
+        nms.getTag().put("AttributeModifiers", attrmod);
+        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
+        player.getInventory().setItemInMainHand(is);
+        player.sendMessage(mm.deserialize("<dark_aqua>Attribute added!"));
+    }
+
+    @Override
+    public void removeAttr(final Player player, final String string)
+    {
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        final ListTag newList = new ListTag();
+        boolean r = false;
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            if (!c.getString("Name").equals(string))
+            {
+                newList.add(nbtBase);
+            }
+            else
+            {
+                r = true;
+            }
+        }
+        if (!r)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>The attribute \"" + string + "\" doesn't exist!"));
+            return;
+        }
+        nms.getTag().put("AttributeModifiers", newList);
+        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
+        player.getInventory().setItemInMainHand(is);
+        player.sendMessage(mm.deserialize("<dark_green>Attribute removed!"));
+    }
+
+    @Override
+    public void listAttr(final Player player)
+    {
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        if (attrmod.size() == 0)
+        {
+            player.sendMessage(mm.deserialize("<yellow>This item has no attributes."));
+            return;
+        }
+        player.sendMessage(mm.deserialize("<dark_green>Item attributes: "));
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            player.sendMessage(mm.deserialize("<yellow>" + Attributes.get(c.getString("AttributeName")).mcName
+                    + ", " + c.getDouble("Amount")));
+        }
+    }
+}

v1_20_R3/build.gradle.kts

@@ -0,0 +1,3 @@
+dependencies {
+    paperweight.paperDevBundle("1.20.4-R0.1-SNAPSHOT")
+}

v1_20_R3/src/main/java/dev/plex/itemizerx/v1_20_R3/AttributeManager.java

@@ -0,0 +1,161 @@
+package dev.plex.itemizerx.v1_20_R3;
+
+import dev.plex.itemizerx.Attributes;
+import dev.plex.itemizerx.IAttributeManager;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.minecraft.nbt.CompoundTag;
+import net.minecraft.nbt.ListTag;
+import net.minecraft.nbt.Tag;
+import net.minecraft.world.item.ItemStack;
+import org.apache.commons.lang3.StringUtils;
+import org.bukkit.craftbukkit.v1_20_R3.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Random;
+
+public class AttributeManager implements IAttributeManager
+{
+    private final MiniMessage mm = MiniMessage.miniMessage();
+
+    @Override
+    public ListTag getAttrList(final ItemStack item)
+    {
+        ListTag attrmod = item.getOrCreateTag().getList("AttributeModifiers", 10);
+        if (attrmod == null)
+        {
+            item.getTag().put("AttributeModifiers", new CompoundTag());
+        }
+        return item.getTag().getList("AttributeModifiers", 10);
+    }
+
+    @Override
+    public void addAttr(final Player player, final String[] args)
+    {
+        int op;
+        if (args.length < 4)
+        {
+            player.sendMessage(mm.deserialize("<aqua>/itemizer attr add <<white>name<aqua>> <<white>strength<aqua>>" +
+                    "[<white>slot<aqua>] <red>- <gold>Add an attribute"));
+            return;
+        }
+        final Attributes a = Attributes.get(args[2]);
+        if (a == null)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>\"" + args[2] + "\" is not a valid attribute type."));
+            return;
+        }
+        double amount;
+        try
+        {
+            amount = Double.parseDouble(args[3]);
+        }
+        catch (NumberFormatException ex)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>\"" + args[3] + "\" is not a valid number."));
+            return;
+        }
+        if (Double.isNaN(amount))
+        {
+            player.sendMessage(mm.deserialize("<dark_red>Please do not use <white>'NaN (Not a Number)'"));
+            return;
+        }
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            if (c.getString("Name").equals(args[2]))
+            {
+                player.sendMessage(mm.deserialize("<dark_red>An attribute with the name \"<white>" + args[2] + "<dark_red>\" already exists!"));
+                return;
+            }
+        }
+        final CompoundTag c = new CompoundTag();
+        c.putString("Name", args[2]);
+        c.putString("AttributeName", a.mcName);
+        c.putDouble("Amount", amount);
+        op = a.op;
+        c.putInt("Operation", op);
+        final Random random = new Random();
+        c.putIntArray("UUID", new int[]
+                {
+                        random.nextInt(),
+                        random.nextInt(),
+                        random.nextInt(),
+                        random.nextInt()
+                });
+        if (args.length == 5)
+        {
+            final List<String> options = new ArrayList<>();
+            options.add("mainhand");
+            options.add("offhand");
+            options.add("head");
+            options.add("chest");
+            options.add("legs");
+            options.add("feet");
+            if (!options.contains(args[4].toLowerCase()))
+            {
+                player.sendMessage(mm.deserialize("<dark_green>Supported options:"));
+                player.sendMessage(mm.deserialize("<yellow>" + StringUtils.join(options, ", ")));
+                return;
+            }
+            c.putString("Slot", args[4].toLowerCase());
+        }
+        attrmod.add(c);
+        nms.getTag().put("AttributeModifiers", attrmod);
+        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
+        player.getInventory().setItemInMainHand(is);
+        player.sendMessage(mm.deserialize("<dark_aqua>Attribute added!"));
+    }
+
+    @Override
+    public void removeAttr(final Player player, final String string)
+    {
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        final ListTag newList = new ListTag();
+        boolean r = false;
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            if (!c.getString("Name").equals(string))
+            {
+                newList.add(nbtBase);
+            }
+            else
+            {
+                r = true;
+            }
+        }
+        if (!r)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>The attribute \"" + string + "\" doesn't exist!"));
+            return;
+        }
+        nms.getTag().put("AttributeModifiers", newList);
+        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
+        player.getInventory().setItemInMainHand(is);
+        player.sendMessage(mm.deserialize("<dark_green>Attribute removed!"));
+    }
+
+    @Override
+    public void listAttr(final Player player)
+    {
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        if (attrmod.size() == 0)
+        {
+            player.sendMessage(mm.deserialize("<yellow>This item has no attributes."));
+            return;
+        }
+        player.sendMessage(mm.deserialize("<dark_green>Item attributes: "));
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            player.sendMessage(mm.deserialize("<yellow>" + Attributes.get(c.getString("AttributeName")).mcName
+                    + ", " + c.getDouble("Amount")));
+        }
+    }
+}

v1_20_R4/build.gradle.kts

@@ -0,0 +1,3 @@
+dependencies {
+    paperweight.paperDevBundle("1.20.6-R0.1-SNAPSHOT")
+}

v1_20_R4/src/main/java/dev/plex/itemizerx/v1_20_R4/AttributeManager.java

@@ -0,0 +1,158 @@
+package dev.plex.itemizerx.v1_20_R4;
+
+import dev.plex.itemizerx.IAttributeManager;
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.concurrent.atomic.AtomicReference;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.minecraft.core.component.DataComponents;
+import net.minecraft.world.entity.EquipmentSlot;
+import net.minecraft.world.entity.EquipmentSlotGroup;
+import net.minecraft.world.entity.ai.attributes.AttributeModifier;
+import net.minecraft.world.entity.ai.attributes.AttributeModifier.Operation;
+import net.minecraft.world.item.Item;
+import net.minecraft.world.item.ItemStack;
+import net.minecraft.world.item.component.ItemAttributeModifiers;
+import net.minecraft.world.item.component.ItemAttributeModifiers.Entry;
+import org.apache.commons.lang3.StringUtils;
+import org.bukkit.craftbukkit.inventory.CraftItemStack;
+import org.bukkit.entity.Player;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class AttributeManager implements IAttributeManager
+{
+    private final MiniMessage mm = MiniMessage.miniMessage();
+
+    @Override
+    public List<AttributeModifier> getAttrList(final Item item)
+    {
+        ItemAttributeModifiers attrmod = item.components().getOrDefault(DataComponents.ATTRIBUTE_MODIFIERS, ItemAttributeModifiers.EMPTY);
+        List<AttributeModifier> modifiers = new ArrayList<>();
+        for (Entry modifier : attrmod.modifiers())
+        {
+            modifiers.add(modifier.modifier());
+        }
+        return modifiers;
+    }
+
+    @Override
+    public void addAttr(final Player player, final String[] args)
+    {
+        if (args.length < 4)
+        {
+            player.sendMessage(mm.deserialize("<aqua>/itemizer attr add <<white>name<aqua>> <<white>strength<aqua>>" +
+                    "[<white>slot<aqua>] <red>- <gold>Add an attribute"));
+            return;
+        }
+
+        final Attributes_v1_20_R4 a = Attributes_v1_20_R4.get(args[2]);
+        if (a == null)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>\"" + args[2] + "\" is not a valid attribute type."));
+            return;
+        }
+
+        double amount;
+        try
+        {
+            amount = Double.parseDouble(args[3]);
+        }
+        catch (NumberFormatException ex)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>\"" + args[3] + "\" is not a valid number."));
+            return;
+        }
+
+        if (Double.isNaN(amount))
+        {
+            player.sendMessage(mm.deserialize("<dark_red>Please do not use <white>'NaN (Not a Number)'"));
+            return;
+        }
+
+        ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final List<AttributeModifier> attrmod = getAttrList(nms.getItem());
+        for (AttributeModifier modifier : attrmod)
+        {
+            if (modifier.name().equalsIgnoreCase(args[2]))
+            {
+                player.sendMessage(mm.deserialize("<dark_red>An attribute with the name \"<white>" + args[2] + "<dark_red>\" already exists!"));
+                return;
+            }
+        }
+
+        AtomicReference<EquipmentSlotGroup> group = new AtomicReference<>(EquipmentSlotGroup.ANY);
+        if (args.length == 5)
+        {
+            EquipmentSlot slot;
+            try
+            {
+                slot = EquipmentSlot.byName(args[4].toLowerCase());
+            }
+            catch (IllegalArgumentException ignored)
+            {
+                player.sendMessage(mm.deserialize("<dark_green>Supported options:"));
+                player.sendMessage(mm.deserialize("<yellow>" + StringUtils.join(Arrays.stream(EquipmentSlot.values()).map(s -> s.getName().toLowerCase()).toArray(), ", ")));
+                return;
+            }
+
+            group.set(EquipmentSlotGroup.bySlot(slot));
+        }
+
+        final AttributeModifier modifier = new AttributeModifier(a.mcName, amount, Operation.BY_ID.apply(a.op));
+        nms.update(DataComponents.ATTRIBUTE_MODIFIERS, ItemAttributeModifiers.EMPTY, x ->
+            x.withModifierAdded(a.attributeHolder, modifier, group.get()).withTooltip(true));
+        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
+        player.getInventory().setItemInMainHand(is);
+        player.sendMessage(mm.deserialize("<dark_aqua>Attribute added!"));
+    }
+
+    @Override
+    public void removeAttr(final Player player, final String string)
+    {
+        /*final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final ListTag attrmod = getAttrList(nms);
+        final ListTag newList = new ListTag();
+        boolean r = false;
+        for (Tag nbtBase : attrmod)
+        {
+            final CompoundTag c = (CompoundTag) nbtBase;
+            if (!c.getString("Name").equals(string))
+            {
+                newList.add(nbtBase);
+            }
+            else
+            {
+                r = true;
+            }
+        }
+        if (!r)
+        {
+            player.sendMessage(mm.deserialize("<dark_red>The attribute \"" + string + "\" doesn't exist!"));
+            return;
+        }
+        //nms.getTag().put("AttributeModifiers", newList);
+        final org.bukkit.inventory.ItemStack is = CraftItemStack.asCraftMirror(nms);
+        player.getInventory().setItemInMainHand(is);*/
+        player.sendMessage(mm.deserialize("<red>Removing attributes isn't supported at the moment!"));
+    }
+
+    @Override
+    public void listAttr(final Player player)
+    {
+        final ItemStack nms = CraftItemStack.asNMSCopy(player.getInventory().getItemInMainHand());
+        final List<AttributeModifier> attrmod = getAttrList(nms.getItem());
+        if (attrmod.isEmpty())
+        {
+            player.sendMessage(mm.deserialize("<yellow>This item has no attributes."));
+            return;
+        }
+
+        player.sendMessage(mm.deserialize("<dark_green>Item attributes: "));
+        for (AttributeModifier modifier : attrmod)
+        {
+            player.sendMessage(mm.deserialize("<yellow>" + modifier.name() + ", " + modifier.amount()));
+        }
+    }
+}

v1_20_R4/src/main/java/dev/plex/itemizerx/v1_20_R4/Attributes_v1_20_R4.java

@@ -0,0 +1,63 @@
+package dev.plex.itemizerx.v1_20_R4;
+
+import java.util.ArrayList;
+import java.util.List;
+import net.minecraft.core.Holder;
+import net.minecraft.world.entity.ai.attributes.Attribute;
+import net.minecraft.world.entity.ai.attributes.Attributes;
+import org.apache.commons.lang3.StringUtils;
+
+public enum Attributes_v1_20_R4
+{
+    MAX_HEALTH("generic.max_health", 0, Attributes.MAX_HEALTH),
+    FOLLOW_RANGE("generic.follow_range", 1, Attributes.FOLLOW_RANGE),
+    KNOCKBACK_RESISTANCE("generic.knockback_resistance", 1, Attributes.KNOCKBACK_RESISTANCE),
+    MOVEMENT_SPEED("generic.movement_speed", 1, Attributes.MOVEMENT_SPEED),
+    FLYING_SPEED("generic.flying_speed", 1, Attributes.FLYING_SPEED),
+    DAMAGE("generic.attack_damage", 0, Attributes.ATTACK_DAMAGE),
+    ATTACK_KNOCKBACK("generic.attack_knockback", 0, Attributes.ATTACK_KNOCKBACK),
+    ATTACK_SPEED("generic.attack_speed", 1, Attributes.ATTACK_SPEED),
+    ARMOR("generic.armor", 0, Attributes.ARMOR),
+    ARMOR_TOUGHNESS("generic.armor_toughness", 0, Attributes.ARMOR_TOUGHNESS),
+    LUCK("generic.luck", 0, Attributes.LUCK),
+    JUMP_STRENGTH("generic.jump_strength", 1, Attributes.JUMP_STRENGTH),
+    ZOMBIE_REINFORCEMENTS("zombie.spawn_reinforcements", 1, Attributes.SPAWN_REINFORCEMENTS_CHANCE);
+
+    public final String mcName;
+    public final int op;
+    public final Holder<Attribute> attributeHolder;
+
+    Attributes_v1_20_R4(String mcName, int op, Holder<Attribute> attributeHolder)
+    {
+        this.mcName = mcName;
+        this.op = op;
+        this.attributeHolder = attributeHolder;
+    }
+
+    public static Attributes_v1_20_R4 get(String name)
+    {
+        for (Attributes_v1_20_R4 attr : values())
+        {
+            if (attr.name().equalsIgnoreCase(name) || attr.mcName.equalsIgnoreCase(name.replace("minecraft:", "")))
+            {
+                return attr;
+            }
+        }
+        return null;
+    }
+
+    public static String getAttributes()
+    {
+        return StringUtils.join(values(), ", ");
+    }
+
+    public static List<String> getAttributeList()
+    {
+        List<String> attributes = new ArrayList<>();
+        for (Attributes_v1_20_R4 attr : values())
+        {
+            attributes.add(attr.name());
+        }
+        return attributes;
+    }
+}

v1_21_R1/build.gradle.kts

@@ -0,0 +1,3 @@
+dependencies {
+    paperweight.paperDevBundle("1.21-R0.1-SNAPSHOT")
+}

v1_21_R1/src/main/java/dev/plex/itemizerx.v1_21_R1/Main.java

@@ -0,0 +1,5 @@
+package dev.plex.itemizerx.v1_21_R1;
+
+public class Main
+{
+}