Initial commit

.gitignore

@@ -0,0 +1,44 @@
+.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/*.xml
+.idea/libraries/
+.idea/.gitignore
+*.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

Jenkinsfile

@@ -0,0 +1,26 @@
+pipeline {
+    agent any
+    stages {
+        stage('Gradle') {
+            steps {
+                sh 'bash gradlew build'
+            }
+        }
+        stage('Archive') {
+            steps {
+                archiveArtifacts artifacts: 'build/libs/', followSymlinks: false
+            }
+        }
+        stage('discord') {
+            when {
+                anyOf {
+                    branch 'main'
+                    branch 'master'
+                }
+            }
+            steps {
+                discordSend description: "Build: ${BUILD_NUMBER}", showChangeset: true, result: currentBuild.currentResult, title: currentBuild.fullProjectName, webhookURL: env.discordwebhook
+            }
+        }
+    }
+}

TODO.MD

@@ -0,0 +1,47 @@
+# General functionality
+- [ ] Progress tracker for the whole event
+- [ ] Tracker per mini game
+  - [ ] Scoreboard which shows progress
+  - [ ] Spawn point
+  - [ ] Function to add effects/attributes
+  - [ ] Function to remove all added effects/attributes
+  - [ ] Finish location/conditions
+- [ ] Chose first/next mini game based on how full they are
+- [ ] Fastests time per mini game and for the whole event
+- [ ] Crash protection in the form of saving progress every x minutes (Including player location)
+- [ ] Let players repeat rooms after finishing the whole event
+- [ ] On death tp back to start
+
+
+## Boat race
+- [ ] Time based leaderboard at start location
+- [ ] Give everyone a boat when they go to spawn or spawn one in for them
+- [ ] Delete boat when a player leaves it and give them a new one (maybe tp them back to spawn)
+- [ ] Checkpoints at start/mid/end
+- [ ] Track progress as lap time and have a scoreboard
+
+## Scavenger hunt
+- [ ] Time based leaderboard at start location
+- [ ] Give players speed 2 after going through the mansion door (until they go to spawn point or finish the event)
+- [ ] Option 1 When player clicks a player head (maybe specific ones) track it and show it on a scoreboard
+- [ ] Option 2 Let players collect items from specific chests, one per player (fake chest ui) and count it as a point like the heads
+- [ ] When all points get collected notify the player and tp them to the next place
+- Option 2 seems like the better option since we already have a button event
+
+## Find the button
+- [ ] Time based leaderboard at start location
+- [ ] Track button clicks (maybe on a scoreboard too)
+- [ ] One click per button per player (notify through hotbar message)
+
+## Dropper
+- [ ] Try based leaderboard at start location (how many tries to get through (only first "win" counts))
+- [ ] Set super high fall damage
+- [ ] Exit portal at the bottom (in water?)
+
+## Mob hunt
+- [ ] Kill certain amount of mobs
+- [ ] Track kills and respawn the ones that died shortly after
+
+## Back rooms
+- [ ] Show players contents of chest (copy) and let them take it out
+- [ ] Start/end point?

build.gradle.kts

@@ -0,0 +1,28 @@
+plugins {
+    id("java")
+}
+
+group = "com.alttd.custommobs"
+version = "1.0-SNAPSHOT"
+
+dependencies {
+    testImplementation(platform("org.junit:junit-bom:5.10.0"))
+    testImplementation("org.junit.jupiter:junit-jupiter")
+
+    compileOnly("com.alttd:Galaxy-API:1.21-R0.1-SNAPSHOT") {
+        isChanging = true
+    }
+
+    compileOnly("org.projectlombok:lombok:1.18.32")
+    annotationProcessor("org.projectlombok:lombok:1.18.32")
+
+    implementation("org.apache.logging.log4j:log4j-api:2.23.1")
+    implementation("org.apache.logging.log4j:log4j-core:2.23.1")
+
+    implementation("org.reflections:reflections:0.10.2")
+    implementation("com.comphenix.protocol:ProtocolLib:5.1.0")
+}
+
+tasks.test {
+    useJUnitPlatform()
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+#Sat Oct 19 00:53:30 CEST 2024
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.8-bin.zip
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,234 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+APP_NAME="Gradle"
+APP_BASE_NAME=${0##*/}
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&2
+
+die () {
+    echo
+    echo "$*"
+    echo
+    exit 1
+} >&2
+
+# OS specific support (must be 'true' or 'false').
+cygwin=false
+msys=false
+darwin=false
+nonstop=false
+case "$( uname )" in                #(
+  CYGWIN* )         cygwin=true  ;; #(
+  Darwin* )         darwin=true  ;; #(
+  MSYS* | MINGW* )  msys=true    ;; #(
+  NONSTOP* )        nonstop=true ;;
+esac
+
+CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+
+
+# Determine the Java command to use to start the JVM.
+if [ -n "$JAVA_HOME" ] ; then
+    if [ -x "$JAVA_HOME/jre/sh/java" ] ; then
+        # IBM's JDK on AIX uses strange locations for the executables
+        JAVACMD=$JAVA_HOME/jre/sh/java
+    else
+        JAVACMD=$JAVA_HOME/bin/java
+    fi
+    if [ ! -x "$JAVACMD" ] ; then
+        die "ERROR: JAVA_HOME is set to an invalid directory: $JAVA_HOME
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+    fi
+else
+    JAVACMD=java
+    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+
+Please set the JAVA_HOME variable in your environment to match the
+location of your Java installation."
+fi
+
+# Increase the maximum file descriptors if we can.
+if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
+    case $MAX_FD in #(
+      max*)
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

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

settings.gradle.kts

@@ -0,0 +1,17 @@
+rootProject.name = "Halloween2024"
+
+dependencyResolutionManagement {
+    repositories {
+        mavenLocal()
+        mavenCentral()
+        maven("https://repo.destro.xyz/snapshots") // Altitude - Galaxy
+        maven("https://repo.dmulloy2.net/repository/public/") // ProtocolLib
+    }
+    repositoriesMode.set(RepositoriesMode.FAIL_ON_PROJECT_REPOS)
+}
+
+pluginManagement {
+    repositories {
+        gradlePluginPortal()
+    }
+}

src/main/java/com/alttd/halloween/Main.java

@@ -0,0 +1,48 @@
+package com.alttd.halloween;
+
+import com.alttd.halloween.leaderboard.Leaderboard;
+import com.comphenix.protocol.ProtocolLibrary;
+import com.comphenix.protocol.ProtocolManager;
+import lombok.Getter;
+import lombok.extern.slf4j.Slf4j;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.World;
+import org.bukkit.plugin.java.JavaPlugin;
+
+import java.util.concurrent.atomic.AtomicInteger;
+
+@Slf4j
+public class Main extends JavaPlugin {
+
+    AtomicInteger ai = new AtomicInteger(0);
+
+    @Getter
+    private ProtocolManager protocolManager;
+
+    @Override
+    public void onEnable() {
+        log.info("Halloween2024 enabled!");
+        World world = Bukkit.getWorld("world");
+        Location location = new Location(world, 34, 122, 8);
+        Leaderboard halloween2024 = new Leaderboard(location, 5, protocolManager, "Halloween2024");
+        Bukkit.getScheduler().runTaskTimer(this, () -> Bukkit.getOnlinePlayers().forEach(player -> {
+            log.info("Adding viewer {}", player.getName());
+            halloween2024.addViewer(player);
+        }), 20, 20);
+        Bukkit.getScheduler().runTaskTimer(this, () -> halloween2024.updateScoreboard((line -> {
+            log.info("Updating line {} iteration {}", line, ai.get());
+            return String.format("This is line %d called %d times", line, ai.getAndIncrement());
+        })), 0, 20);
+    }
+
+    @Override
+    public void onLoad() {
+        protocolManager = ProtocolLibrary.getProtocolManager();
+    }
+
+    @Override
+    public void onDisable() {
+        log.info("Halloween2024 disabled!");
+    }
+}

src/main/java/com/alttd/halloween/leaderboard/HoverText.java

@@ -0,0 +1,73 @@
+package com.alttd.halloween.leaderboard;
+
+import com.comphenix.protocol.PacketType;
+import com.comphenix.protocol.ProtocolManager;
+import com.comphenix.protocol.events.PacketContainer;
+import com.comphenix.protocol.reflect.FieldAccessException;
+import com.comphenix.protocol.utility.MinecraftReflection;
+import com.comphenix.protocol.wrappers.WrappedChatComponent;
+import com.comphenix.protocol.wrappers.WrappedDataWatcher;
+import lombok.extern.slf4j.Slf4j;
+import org.bukkit.Location;
+
+import java.util.Optional;
+import java.util.UUID;
+
+@Slf4j
+public class HoverText {
+
+    private final ProtocolManager protocolManager;
+
+    public HoverText(ProtocolManager protocolManager) {
+        this.protocolManager = protocolManager;
+    }
+
+    public Optional<PacketContainer> setLine(LeaderboardLineEntity entity, String text) {
+        return setLine(entity.entityId(), text);
+    }
+
+    public Optional<LeaderboardLineEntity> createLeaderboardLineEntity(Location location) {
+        try {
+            PacketContainer spawnPacket = protocolManager.createPacket(PacketType.Play.Server.SPAWN_ENTITY);
+            int entityId = (int) (Math.random() * Integer.MAX_VALUE);
+
+            spawnPacket.getModifier().writeDefaults();
+            spawnPacket.getIntegers().write(0, entityId);
+            spawnPacket.getUUIDs().write(0, UUID.randomUUID());
+            spawnPacket.getDoubles()
+                    .write(0, location.getX())
+                    .write(1, location.getY())
+                    .write(2, location.getZ());
+            spawnPacket.getIntegers().write(1, 78); // Armor Stand type
+            PacketContainer destroyPacket = protocolManager.createPacket(PacketType.Play.Server.ENTITY_DESTROY);
+            destroyPacket.getIntegerArrays().write(0, new int[]{entityId});
+            return Optional.of(new LeaderboardLineEntity(entityId, spawnPacket, destroyPacket));
+        } catch (Exception e) {
+            log.error("Failed to create hover text entity", e);
+        }
+        return Optional.empty();
+    }
+
+    public Optional<PacketContainer> setLine(int entityId, String text) {
+        try {
+            PacketContainer metaPacket = protocolManager.createPacket(PacketType.Play.Server.ENTITY_METADATA);
+            metaPacket.getIntegers().write(0, entityId);
+            WrappedDataWatcher watcher = new WrappedDataWatcher();
+
+            WrappedDataWatcher.Serializer serializer = WrappedDataWatcher.Registry.get(MinecraftReflection.getIChatBaseComponentClass());
+            WrappedDataWatcher.WrappedDataWatcherObject displayName = new WrappedDataWatcher.WrappedDataWatcherObject(2, serializer);
+            WrappedChatComponent component = WrappedChatComponent.fromText(text);
+
+            watcher.setObject(displayName, Optional.of(component.getHandle()));
+            watcher.setObject(new WrappedDataWatcher.WrappedDataWatcherObject(3, WrappedDataWatcher.Registry.get(Boolean.class)), true);  // Custom Name Visible
+            watcher.setObject(new WrappedDataWatcher.WrappedDataWatcherObject(0, WrappedDataWatcher.Registry.get(Byte.class)), (byte) 0x20);  // Invisible
+
+            metaPacket.getWatchableCollectionModifier().write(0, watcher.getWatchableObjects());
+            return Optional.of(metaPacket);
+        } catch (FieldAccessException e) {
+            log.error("Failed to edit line on hover text", e);
+        }
+        return Optional.empty();
+    }
+
+}

src/main/java/com/alttd/halloween/leaderboard/Leaderboard.java

@@ -0,0 +1,106 @@
+package com.alttd.halloween.leaderboard;
+
+import com.comphenix.protocol.ProtocolManager;
+import com.comphenix.protocol.events.PacketContainer;
+import lombok.extern.slf4j.Slf4j;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+
+import java.util.*;
+import java.util.function.Function;
+
+@Slf4j
+public class Leaderboard {
+
+    private final LeaderboardLineEntity title;
+    private final List<LeaderboardLineEntity> lines;
+    private final HashMap<Integer, PacketContainer> metaPacket = new HashMap<>();
+    private final HashMap<UUID, Player> viewers = new HashMap<>();
+    private final ProtocolManager protocolManager;
+    private final int leaderboardSize;
+
+    public Leaderboard(Location location, int leaderboardSize, ProtocolManager protocolManager, String title) {
+        this.leaderboardSize = leaderboardSize;
+        this.protocolManager = protocolManager;
+        if (leaderboardSize < 1) {
+            throw new IllegalArgumentException("Leaderboard must have at least one line");
+        }
+        HoverText hoverText = new HoverText(protocolManager);
+        this.title = createTitle(hoverText, location, title, leaderboardSize + 1);
+        this.lines = createLines(new HoverText(protocolManager), location);
+    }
+
+    private LeaderboardLineEntity createTitle(HoverText hoverText, Location location, String title, int titleLocation) {
+        Location clone = location.clone();
+        clone.setY(clone.getY() + titleLocation);
+        Optional<LeaderboardLineEntity> leaderboardLineEntity = hoverText.createLeaderboardLineEntity(clone);
+        if (leaderboardLineEntity.isEmpty()) {
+            log.error("Failed to create title");
+            throw new ExceptionInInitializerError("Failed to create title");
+        }
+        Optional<PacketContainer> packetContainer = hoverText.setLine(leaderboardLineEntity.get(), title);
+        if (packetContainer.isEmpty()) {
+            log.error("Failed to create title text");
+            throw new ExceptionInInitializerError("Failed to create title text");
+        }
+        metaPacket.put(leaderboardLineEntity.get().entityId(), packetContainer.get());
+        return leaderboardLineEntity.get();
+    }
+
+    private List<LeaderboardLineEntity> createLines(HoverText hoverText, Location location) throws ExceptionInInitializerError {
+        List<LeaderboardLineEntity> lines = new ArrayList<>();
+        for (int i = 0; i < leaderboardSize; i++) {
+            Location clone = location.clone();
+            clone.setY(clone.getY() + leaderboardSize - i);
+            Optional<LeaderboardLineEntity> optionalLeaderboardLineEntity = hoverText.createLeaderboardLineEntity(clone);
+            if (optionalLeaderboardLineEntity.isEmpty()) {
+                log.error("Failed to create leaderboard");
+                throw new ExceptionInInitializerError("Failed to create leaderboard");
+            }
+            LeaderboardLineEntity leaderboardLineEntity = optionalLeaderboardLineEntity.get();
+            Optional<PacketContainer> packetContainer = hoverText.setLine(leaderboardLineEntity, "");
+            if (packetContainer.isEmpty()) {
+                log.error("Failed to create line text");
+                throw new ExceptionInInitializerError("Failed to create line text");
+            }
+            metaPacket.put(leaderboardLineEntity.entityId(), packetContainer.get());
+            lines.add(leaderboardLineEntity);
+        }
+        return lines;
+    }
+
+    public void updateScoreboard(Function<Integer, String> func) {//TODO remove offline players and check if the player is still nearby?
+        HoverText hoverText = new HoverText(protocolManager); //TODO make it so this doesnt have to be recreated? Could be static maybe
+        for (int i = 0; i < lines.size(); i++) {
+            LeaderboardLineEntity leaderboardLineEntity = lines.get(i);
+            Optional<PacketContainer> packetContainer = hoverText.setLine(leaderboardLineEntity, func.apply(i));
+            if (packetContainer.isEmpty()) {
+                log.error("Failed to update line text");
+                throw new ExceptionInInitializerError("Failed to update line text");
+            }
+            metaPacket.put(leaderboardLineEntity.entityId(), packetContainer.get());
+        }
+        viewers.values().forEach(this::updateScoreboard);
+    }
+
+    private void updateScoreboard(Player player) {
+        metaPacket.values().forEach(metaPacket -> protocolManager.sendServerPacket(player, metaPacket));
+    }
+
+    public void addViewer(Player player) {
+        if (viewers.put(player.getUniqueId(), player) == null) {
+            return; //Player was already in viewers list
+        }
+        protocolManager.sendServerPacket(player, title.entitySpawnPacket());
+        lines.forEach(line -> protocolManager.sendServerPacket(player, line.entitySpawnPacket()));
+    }
+
+    public void removeViewer(Player player) {
+        Player removed = viewers.remove(player.getUniqueId());
+        if (removed == null || !removed.isOnline()) {
+            return;
+        }
+        protocolManager.sendServerPacket(player, title.entityDestroyPacket());
+        lines.forEach(line -> protocolManager.sendServerPacket(player, line.entityDestroyPacket()));
+    }
+}

src/main/java/com/alttd/halloween/leaderboard/LeaderboardLineEntity.java

@@ -0,0 +1,6 @@
+package com.alttd.halloween.leaderboard;
+
+import com.comphenix.protocol.events.PacketContainer;
+
+public record LeaderboardLineEntity(int entityId, PacketContainer entitySpawnPacket, PacketContainer entityDestroyPacket) {
+}

src/main/resources/plugin.yml

@@ -0,0 +1,15 @@
+name: Halloween
+version: '1.0.0'
+main: com.alttd.halloween.Main
+description: A plugin for the 2024 halloween event
+author: Stijn
+website: https://alttd.com
+api-version: '1.21'
+commands:
+  custommobs:
+    description: Base command for halloween event
+    permission: halloween.use
+    usage: /halloween
+    aliases:
+      - event
+      - h