Move to Gradle & implement platform-independent scheduler

.gitignore

@@ -1,7 +1,8 @@
 .idea/
 .settings/
 bin/
-target/
+build/
+.gradle/
 .checkstyle
 .classpath
 .project

build.gradle.kts

@@ -0,0 +1,44 @@
+plugins {
+    id("java")
+    id("checkstyle")
+    id("com.github.johnrengelman.shadow") version "8.1.1"
+}
+
+dependencies {
+    compileOnly("io.papermc.paper:paper-api:1.19.4-R0.1-SNAPSHOT")
+
+    implementation(project(":common"))
+    implementation(project(":paper-platform"))
+    implementation(project(":folia-platform"))
+}
+
+allprojects {
+    apply(plugin = "java")
+    apply(plugin = "checkstyle")
+
+    repositories {
+        mavenCentral()
+        maven("https://repo.papermc.io/repository/maven-public/")
+    }
+
+    group = "pw.kaboom"
+    version = "master"
+    description = "Extras"
+    java.sourceCompatibility = JavaVersion.VERSION_17
+
+    tasks {
+        assemble {
+            dependsOn(checkstyleMain)
+        }
+
+        compileJava {
+            options.encoding = "UTF-8"
+        }
+    }
+}
+
+tasks {
+    assemble {
+        dependsOn(shadowJar)
+    }
+}

common/build.gradle.kts

@@ -0,0 +1,3 @@
+dependencies {
+    compileOnly("io.papermc.paper:paper-api:1.19.4-R0.1-SNAPSHOT")
+}

common/src/main/java/pw/kaboom/extras/platform/IScheduler.java

@@ -0,0 +1,14 @@
+package pw.kaboom.extras.platform;
+
+import org.bukkit.plugin.Plugin;
+
+import java.util.concurrent.TimeUnit;
+
+public interface IScheduler {
+    void runRepeating(final Plugin plugin, final Runnable runnable, final long delay,
+                      final long period, final TimeUnit unit);
+    void runLater(final Plugin plugin, final Runnable runnable,
+                  final long delay, final TimeUnit unit);
+    void runSync(final Plugin plugin, final Runnable runnable);
+    void runAsync(final Plugin plugin, final Runnable runnable);
+}

common/src/main/java/pw/kaboom/extras/platform/PlatformScheduler.java

@@ -0,0 +1,36 @@
+package pw.kaboom.extras.platform;
+
+import org.bukkit.plugin.Plugin;
+
+import java.util.concurrent.TimeUnit;
+
+public final class PlatformScheduler {
+    private static IScheduler currentScheduler = null;
+
+    public static void setCurrentScheduler(final IScheduler implementation) {
+        if (currentScheduler != null) {
+            throw new IllegalStateException("Tried to set current scheduler, even though " +
+                    " it was already set!");
+        }
+
+        currentScheduler = implementation;
+    }
+
+    public static void runRepeating(final Plugin plugin, final Runnable runnable,
+                                    final long delay, final long period, final TimeUnit unit) {
+        currentScheduler.runRepeating(plugin, runnable, delay, period, unit);
+    }
+
+    public static void runLater(final Plugin plugin, final Runnable runnable,
+                                final long delay, final TimeUnit unit) {
+        currentScheduler.runLater(plugin, runnable, delay, unit);
+    }
+
+    public static void runSync(final Plugin plugin, final Runnable runnable) {
+        currentScheduler.runSync(plugin, runnable);
+    }
+
+    public static void runAsync(final Plugin plugin, final Runnable runnable) {
+        currentScheduler.runAsync(plugin, runnable);
+    }
+}

folia-platform/build.gradle.kts

@@ -0,0 +1,5 @@
+dependencies {
+    compileOnly("dev.folia:folia-api:1.19.4-R0.1-SNAPSHOT")
+
+    implementation(project(":common"))
+}

folia-platform/src/main/java/pw/kaboom/extras/platform/folia/FoliaScheduler.java

@@ -0,0 +1,54 @@
+package pw.kaboom.extras.platform.folia;
+
+import io.papermc.paper.threadedregions.scheduler.AsyncScheduler;
+import io.papermc.paper.threadedregions.scheduler.ScheduledTask;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import pw.kaboom.extras.platform.IScheduler;
+
+import java.util.concurrent.TimeUnit;
+import java.util.function.Consumer;
+
+public final class FoliaScheduler implements IScheduler {
+    private static final AsyncScheduler ASYNC_SCHEDULER = Bukkit.getAsyncScheduler();
+
+    @Override
+    public void runRepeating(final Plugin plugin, final Runnable runnable,
+                             final long delay, final long period,
+                             final TimeUnit unit) {
+        ASYNC_SCHEDULER.runAtFixedRate(plugin, FoliaTask.from(runnable), delay, period, unit);
+    }
+
+    @Override
+    public void runLater(final Plugin plugin, final Runnable runnable, final long delay,
+                         final TimeUnit unit) {
+        ASYNC_SCHEDULER.runDelayed(plugin, FoliaTask.from(runnable), delay, unit);
+    }
+
+    @Override
+    public void runSync(final Plugin plugin, final Runnable runnable) {
+        ASYNC_SCHEDULER.runNow(plugin, FoliaTask.from(runnable));
+    }
+
+    @Override
+    public void runAsync(final Plugin plugin, final Runnable runnable) {
+        ASYNC_SCHEDULER.runNow(plugin, FoliaTask.from(runnable));
+    }
+
+    private static final class FoliaTask implements Consumer<ScheduledTask> {
+        private final Runnable runnable;
+
+        FoliaTask(final Runnable runnable) {
+            this.runnable = runnable;
+        }
+
+        @Override
+        public void accept(final ScheduledTask scheduledTask) {
+            this.runnable.run();
+        }
+
+        public static FoliaTask from(final Runnable runnable) {
+            return new FoliaTask(runnable);
+        }
+    }
+}

gradle/wrapper/gradle-wrapper.properties

@@ -0,0 +1,6 @@
+distributionBase=GRADLE_USER_HOME
+distributionPath=wrapper/dists
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.0.2-bin.zip
+networkTimeout=10000
+zipStoreBase=GRADLE_USER_HOME
+zipStorePath=wrapper/dists

gradlew

@@ -0,0 +1,244 @@
+#!/bin/sh
+
+#
+# Copyright © 2015-2021 the original authors.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+
+##############################################################################
+#
+#   Gradle start up script for POSIX generated by Gradle.
+#
+#   Important for running:
+#
+#   (1) You need a POSIX-compliant shell to run this script. If your /bin/sh is
+#       noncompliant, but you have some other compliant shell such as ksh or
+#       bash, then to run this script, type that shell name before the whole
+#       command line, like:
+#
+#           ksh Gradle
+#
+#       Busybox and similar reduced shells will NOT work, because this script
+#       requires all of these POSIX shell features:
+#         * functions;
+#         * expansions «$var», «${var}», «${var:-default}», «${var+SET}»,
+#           «${var#prefix}», «${var%suffix}», and «$( cmd )»;
+#         * compound commands having a testable exit status, especially «case»;
+#         * various built-in commands including «command», «set», and «ulimit».
+#
+#   Important for patching:
+#
+#   (2) This script targets any POSIX shell, so it avoids extensions provided
+#       by Bash, Ksh, etc; in particular arrays are avoided.
+#
+#       The "traditional" practice of packing multiple parameters into a
+#       space-separated string is a well documented source of bugs and security
+#       problems, so this is (mostly) avoided, by progressively accumulating
+#       options in "$@", and eventually passing that to Java.
+#
+#       Where the inherited environment variables (DEFAULT_JVM_OPTS, JAVA_OPTS,
+#       and GRADLE_OPTS) rely on word-splitting, this is performed explicitly;
+#       see the in-line comments for details.
+#
+#       There are tweaks for specific operating systems such as AIX, CygWin,
+#       Darwin, MinGW, and NonStop.
+#
+#   (3) This script is generated from the Groovy template
+#       https://github.com/gradle/gradle/blob/HEAD/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       within the Gradle project.
+#
+#       You can find Gradle at https://github.com/gradle/gradle/.
+#
+##############################################################################
+
+# Attempt to set APP_HOME
+
+# Resolve links: $0 may be a link
+app_path=$0
+
+# Need this for daisy-chained symlinks.
+while
+    APP_HOME=${app_path%"${app_path##*/}"}  # leaves a trailing /; empty if no leading path
+    [ -h "$app_path" ]
+do
+    ls=$( ls -ld "$app_path" )
+    link=${ls#*' -> '}
+    case $link in             #(
+      /*)   app_path=$link ;; #(
+      *)    app_path=$APP_HOME$link ;;
+    esac
+done
+
+# This is normally unused
+# shellcheck disable=SC2034
+APP_BASE_NAME=${0##*/}
+APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
+
+# Use the maximum available, or set MAX_FD != -1 to use that value.
+MAX_FD=maximum
+
+warn () {
+    echo "$*"
+} >&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 $MAX_FD in #(
+      max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045 
+        MAX_FD=$( ulimit -H -n ) ||
+            warn "Could not query maximum file descriptor limit"
+    esac
+    case $MAX_FD in  #(
+      '' | soft) :;; #(
+      *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC3045 
+        ulimit -n "$MAX_FD" ||
+            warn "Could not set maximum file descriptor limit to $MAX_FD"
+    esac
+fi
+
+# Collect all arguments for the java command, stacking in reverse order:
+#   * args from the command line
+#   * the main class name
+#   * -classpath
+#   * -D...appname settings
+#   * --module-path (only if needed)
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and GRADLE_OPTS environment variables.
+
+# For Cygwin or MSYS, switch paths to Windows format before running java
+if "$cygwin" || "$msys" ; then
+    APP_HOME=$( cygpath --path --mixed "$APP_HOME" )
+    CLASSPATH=$( cygpath --path --mixed "$CLASSPATH" )
+
+    JAVACMD=$( cygpath --unix "$JAVACMD" )
+
+    # Now convert the arguments - kludge to limit ourselves to /bin/sh
+    for arg do
+        if
+            case $arg in                                #(
+              -*)   false ;;                            # don't mess with options #(
+              /?*)  t=${arg#/} t=/${t%%/*}              # looks like a POSIX filepath
+                    [ -e "$t" ] ;;                      #(
+              *)    false ;;
+            esac
+        then
+            arg=$( cygpath --path --ignore --mixed "$arg" )
+        fi
+        # Roll the args list around exactly as many times as the number of
+        # args, so each arg winds up back in the position where it started, but
+        # possibly modified.
+        #
+        # NB: a `for` loop captures its iteration list before it begins, so
+        # changing the positional parameters here affects neither the number of
+        # iterations, nor the values presented in `arg`.
+        shift                   # remove old arg
+        set -- "$@" "$arg"      # push replacement arg
+    done
+fi
+
+# Collect all arguments for the java command;
+#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+#     shell script including quotes and variable substitutions, so put them in
+#     double quotes to make sure that they get re-expanded; and
+#   * put everything else in single quotes, so that it's not re-expanded.
+
+set -- \
+        "-Dorg.gradle.appname=$APP_BASE_NAME" \
+        -classpath "$CLASSPATH" \
+        org.gradle.wrapper.GradleWrapperMain \
+        "$@"
+
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
+# Use "xargs" to parse quoted args.
+#
+# With -n1 it outputs one arg per line, with the quotes and backslashes removed.
+#
+# In Bash we could simply go:
+#
+#   readarray ARGS < <( xargs -n1 <<<"$var" ) &&
+#   set -- "${ARGS[@]}" "$@"
+#
+# but POSIX shell has neither arrays nor command substitution, so instead we
+# post-process each arg (as a line of input to sed) to backslash-escape any
+# character that might be a shell metacharacter, then use eval to reverse
+# that process (while maintaining the separation between arguments), and wrap
+# the whole thing up as a single "set" statement.
+#
+# This will of course break if any of these variables contains a newline or
+# an unmatched quote.
+#
+
+eval "set -- $(
+        printf '%s\n' "$DEFAULT_JVM_OPTS $JAVA_OPTS $GRADLE_OPTS" |
+        xargs -n1 |
+        sed ' s~[^-[:alnum:]+,./:=@_]~\\&~g; ' |
+        tr '\n' ' '
+    )" '"$@"'
+
+exec "$JAVACMD" "$@"

gradlew.bat

@@ -0,0 +1,92 @@
+@rem
+@rem Copyright 2015 the original author or authors.
+@rem
+@rem Licensed under the Apache License, Version 2.0 (the "License");
+@rem you may not use this file except in compliance with the License.
+@rem You may obtain a copy of the License at
+@rem
+@rem      https://www.apache.org/licenses/LICENSE-2.0
+@rem
+@rem Unless required by applicable law or agreed to in writing, software
+@rem distributed under the License is distributed on an "AS IS" BASIS,
+@rem WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+@rem See the License for the specific language governing permissions and
+@rem limitations under the License.
+@rem
+
+@if "%DEBUG%"=="" @echo off
+@rem ##########################################################################
+@rem
+@rem  Gradle startup script for Windows
+@rem
+@rem ##########################################################################
+
+@rem Set local scope for the variables with windows NT shell
+if "%OS%"=="Windows_NT" setlocal
+
+set DIRNAME=%~dp0
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
+set APP_BASE_NAME=%~n0
+set APP_HOME=%DIRNAME%
+
+@rem Resolve any "." and ".." in APP_HOME to make it shorter.
+for %%i in ("%APP_HOME%") do set APP_HOME=%%~fi
+
+@rem Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+set DEFAULT_JVM_OPTS="-Xmx64m" "-Xms64m"
+
+@rem Find java.exe
+if defined JAVA_HOME goto findJavaFromJavaHome
+
+set JAVA_EXE=java.exe
+%JAVA_EXE% -version >NUL 2>&1
+if %ERRORLEVEL% equ 0 goto execute
+
+echo.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:findJavaFromJavaHome
+set JAVA_HOME=%JAVA_HOME:"=%
+set JAVA_EXE=%JAVA_HOME%/bin/java.exe
+
+if exist "%JAVA_EXE%" goto execute
+
+echo.
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo.
+echo Please set the JAVA_HOME variable in your environment to match the
+echo location of your Java installation.
+
+goto fail
+
+:execute
+@rem Setup the command line
+
+set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+
+
+@rem Execute Gradle
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+
+:end
+@rem End local scope for the variables with windows NT shell
+if %ERRORLEVEL% equ 0 goto mainEnd
+
+:fail
+rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
+rem the _cmd.exe /c_ return code!
+set EXIT_CODE=%ERRORLEVEL%
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
+
+:mainEnd
+if "%OS%"=="Windows_NT" endlocal
+
+:omega

paper-platform/build.gradle.kts

@@ -0,0 +1,5 @@
+dependencies {
+    compileOnly("io.papermc.paper:paper-api:1.19.4-R0.1-SNAPSHOT")
+
+    implementation(project(":common"))
+}

paper-platform/src/main/java/pw/kaboom/extras/platform/paper/PaperScheduler.java

@@ -0,0 +1,42 @@
+package pw.kaboom.extras.platform.paper;
+
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.scheduler.BukkitScheduler;
+import pw.kaboom.extras.platform.IScheduler;
+
+import java.util.concurrent.TimeUnit;
+
+public final class PaperScheduler implements IScheduler {
+    private static final BukkitScheduler BUKKIT_SCHEDULER = Bukkit.getScheduler();
+
+    private static long convertIntoTicks(final long time, final TimeUnit unit) {
+        final long millis = unit.toMillis(time);
+
+        return millis / 20L;
+    }
+
+    @Override
+    public void runRepeating(final Plugin plugin, final Runnable runnable, final long delay,
+                             final long period, final TimeUnit unit) {
+        BUKKIT_SCHEDULER.runTaskTimerAsynchronously(plugin, runnable, convertIntoTicks(delay, unit),
+                convertIntoTicks(period, unit));
+    }
+
+    @Override
+    public void runLater(final Plugin plugin, final Runnable runnable,
+                         final long delay, TimeUnit unit) {
+        BUKKIT_SCHEDULER.runTaskLaterAsynchronously(plugin, runnable,
+                convertIntoTicks(delay, unit));
+    }
+
+    @Override
+    public void runSync(final Plugin plugin, final Runnable runnable) {
+        BUKKIT_SCHEDULER.runTask(plugin, runnable);
+    }
+
+    @Override
+    public void runAsync(final Plugin plugin, final Runnable runnable) {
+        BUKKIT_SCHEDULER.runTaskAsynchronously(plugin, runnable);
+    }
+}

pom.xml

@@ -1,61 +0,0 @@
-<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
-    <modelVersion>4.0.0</modelVersion>
-    <groupId>pw.kaboom</groupId>
-    <artifactId>Extras</artifactId>
-    <version>master</version>
-
-    <properties>
-        <maven.compiler.source>17</maven.compiler.source>
-        <maven.compiler.target>17</maven.compiler.target>
-        <maven.test.skip>true</maven.test.skip>
-        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
-    </properties>
-
-    <dependencies>
-        <dependency>
-            <groupId>io.papermc.paper</groupId>
-            <artifactId>paper-api</artifactId>
-            <version>1.19.4-R0.1-SNAPSHOT</version>
-            <scope>provided</scope>
-        </dependency>
-        <dependency>
-            <groupId>dev.folia</groupId>
-            <artifactId>folia-api</artifactId>
-            <version>1.19.4-R0.1-SNAPSHOT</version>
-            <scope>provided</scope>
-        </dependency>
-    </dependencies>
-
-    <repositories>
-        <repository>
-            <id>papermc</id>
-            <url>https://repo.papermc.io/repository/maven-public/</url>
-        </repository>
-    </repositories>
-
-    <build>
-        <finalName>${project.artifactId}</finalName>
-        <plugins>
-            <plugin>
-                <groupId>org.apache.maven.plugins</groupId>
-                <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.2.0</version>
-                <executions>
-                    <execution>
-                        <id>checkstyle</id>
-                        <phase>validate</phase>
-                        <goals>
-                            <goal>check</goal>
-                        </goals>
-                        <configuration>
-                            <configLocation>checkstyle.xml</configLocation>
-                            <suppressionsLocation>suppressions.xml</suppressionsLocation>
-                            <failOnViolation>true</failOnViolation>
-                        </configuration>
-                    </execution>
-                </executions>
-            </plugin>
-        </plugins>
-    </build>
-</project>
-

settings.gradle.kts

@@ -0,0 +1,4 @@
+rootProject.name = "Extras"
+include("paper-platform")
+include("folia-platform")
+include("common")

src/main/java/pw/kaboom/extras/Main.java

@@ -1,56 +1,54 @@
 package pw.kaboom.extras;
 
-import java.io.File;
-import java.util.Collections;
 import org.bukkit.WorldCreator;
 import org.bukkit.WorldType;
 import org.bukkit.block.BlockFace;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.configuration.file.YamlConfiguration;
 import org.bukkit.plugin.java.JavaPlugin;
-import pw.kaboom.extras.commands.CommandBroadcastMM;
-import pw.kaboom.extras.commands.CommandBroadcastVanilla;
-import pw.kaboom.extras.commands.CommandClearChat;
-import pw.kaboom.extras.commands.CommandConsole;
-import pw.kaboom.extras.commands.CommandDestroyEntities;
-import pw.kaboom.extras.commands.CommandEnchantAll;
-import pw.kaboom.extras.commands.CommandGetJSON;
-import pw.kaboom.extras.commands.CommandJumpscare;
-import pw.kaboom.extras.commands.CommandKaboom;
-import pw.kaboom.extras.commands.CommandPing;
-import pw.kaboom.extras.commands.CommandPrefix;
-import pw.kaboom.extras.commands.CommandPumpkin;
-import pw.kaboom.extras.commands.CommandServerInfo;
-import pw.kaboom.extras.commands.CommandSkin;
-import pw.kaboom.extras.commands.CommandSpawn;
-import pw.kaboom.extras.commands.CommandSpidey;
-import pw.kaboom.extras.commands.CommandTellraw;
-import pw.kaboom.extras.commands.CommandUsername;
+import pw.kaboom.extras.commands.*;
 import pw.kaboom.extras.modules.block.BlockCheck;
 import pw.kaboom.extras.modules.block.BlockPhysics;
 import pw.kaboom.extras.modules.entity.EntityExplosion;
 import pw.kaboom.extras.modules.entity.EntityKnockback;
 import pw.kaboom.extras.modules.entity.EntitySpawn;
 import pw.kaboom.extras.modules.entity.EntityTeleport;
-import pw.kaboom.extras.modules.player.PlayerChat;
-import pw.kaboom.extras.modules.player.PlayerCommand;
-import pw.kaboom.extras.modules.player.PlayerConnection;
-import pw.kaboom.extras.modules.player.PlayerDamage;
-import pw.kaboom.extras.modules.player.PlayerInteract;
-import pw.kaboom.extras.modules.player.PlayerPrefix;
-import pw.kaboom.extras.modules.player.PlayerRecipe;
-import pw.kaboom.extras.modules.player.PlayerTeleport;
+import pw.kaboom.extras.modules.player.*;
 import pw.kaboom.extras.modules.server.ServerCommand;
 import pw.kaboom.extras.modules.server.ServerGameRule;
 import pw.kaboom.extras.modules.server.ServerTabComplete;
 import pw.kaboom.extras.modules.server.ServerTick;
+import pw.kaboom.extras.platform.PlatformScheduler;
+import pw.kaboom.extras.platform.folia.FoliaScheduler;
+import pw.kaboom.extras.platform.paper.PaperScheduler;
+
+import java.io.File;
+import java.util.Collections;
 
 public final class Main extends JavaPlugin {
+    private boolean isFolia;
     private File prefixConfigFile;
     private FileConfiguration prefixConfig;
 
+    public boolean isFolia() {
+        return this.isFolia;
+    }
+
     @Override
     public void onLoad() {
+        try {
+            Class.forName("io.papermc.paper.threadedregions.RegionizedServer");
+            isFolia = true;
+        } catch (ClassNotFoundException ignored) {
+            isFolia = false;
+        }
+
+        if (isFolia) {
+            PlatformScheduler.setCurrentScheduler(new FoliaScheduler());
+        } else {
+            PlatformScheduler.setCurrentScheduler(new PaperScheduler());
+        }
+
         /* Fill lists */
         Collections.addAll(
                 BlockPhysics.getBlockFaces(),
@@ -86,11 +84,11 @@ public final class Main extends JavaPlugin {
         this.getCommand("prefix").setExecutor(new CommandPrefix());
         this.getCommand("pumpkin").setExecutor(new CommandPumpkin());
         this.getCommand("serverinfo").setExecutor(new CommandServerInfo());
-        this.getCommand("skin").setExecutor(new CommandSkin());
+        this.getCommand("username").setExecutor(new CommandUsername());
         this.getCommand("spawn").setExecutor(new CommandSpawn());
         this.getCommand("spidey").setExecutor(new CommandSpidey());
         this.getCommand("tellraw").setExecutor(new CommandTellraw());
-        this.getCommand("username").setExecutor(new CommandUsername());
+        this.getCommand("skin").setExecutor(new CommandSkin());
 
         /* Block-related modules */
         BlockPhysics.init(this);
@@ -121,9 +119,15 @@ public final class Main extends JavaPlugin {
         this.getServer().getPluginManager().registerEvents(new ServerTick(), this);
 
         /* Custom worlds */
-        this.getServer().createWorld(
-            new WorldCreator("world_flatlands").generateStructures(false).type(WorldType.FLAT)
-        );
+        // Custom worlds are not implemented on Folia!
+        if(!isFolia) {
+            this.getServer().createWorld(
+                    new WorldCreator("world_flatlands")
+                            .generateStructures(false)
+                            .type(WorldType.FLAT)
+            );
+        }
+
     }
 
 	public File getPrefixConfigFile() {

src/main/java/pw/kaboom/extras/commands/CommandSkin.java

@@ -1,7 +1,5 @@
 package pw.kaboom.extras.commands;
 
-import java.util.HashMap;
-import java.util.Map;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import org.bukkit.command.Command;
@@ -9,9 +7,13 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.ConsoleCommandSender;
 import org.bukkit.entity.Player;
+import org.bukkit.plugin.java.JavaPlugin;
+import pw.kaboom.extras.Main;
 import pw.kaboom.extras.skin.SkinManager;
 
 import javax.annotation.Nonnull;
+import java.util.HashMap;
+import java.util.Map;
 
 public final class CommandSkin implements CommandExecutor {
     private final Map<Player, Long> lastUsedMillis = new HashMap<>();
@@ -21,6 +23,14 @@ public final class CommandSkin implements CommandExecutor {
                              final @Nonnull Command command,
                              final @Nonnull String label,
                              final String[] args) {
+        final Main plugin = JavaPlugin.getPlugin(Main.class);
+
+        if (plugin.isFolia()) {
+            sender.sendMessage(Component
+                    .text("Command cannot be ran on Folia servers!"));
+            return true;
+        }
+
         if (sender instanceof ConsoleCommandSender) {
             sender.sendMessage(Component
                     .text("Command has to be run by a player"));

src/main/java/pw/kaboom/extras/commands/CommandUsername.java

@@ -1,8 +1,6 @@
 package pw.kaboom.extras.commands;
 
 import com.destroystokyo.paper.profile.PlayerProfile;
-import java.util.HashMap;
-import java.util.Map;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.format.NamedTextColor;
 import org.bukkit.Bukkit;
@@ -12,8 +10,12 @@ import org.bukkit.command.CommandExecutor;
 import org.bukkit.command.CommandSender;
 import org.bukkit.command.ConsoleCommandSender;
 import org.bukkit.entity.Player;
+import org.bukkit.plugin.java.JavaPlugin;
+import pw.kaboom.extras.Main;
 
 import javax.annotation.Nonnull;
+import java.util.HashMap;
+import java.util.Map;
 
 public final class CommandUsername implements CommandExecutor {
     private final Map<Player, Long> lastUsedMillis = new HashMap<>();
@@ -23,6 +25,14 @@ public final class CommandUsername implements CommandExecutor {
                              final @Nonnull Command command,
                              final @Nonnull String label,
                              final String[] args) {
+        final Main plugin = JavaPlugin.getPlugin(Main.class);
+
+        if (plugin.isFolia()) {
+            sender.sendMessage(Component
+                    .text("Command cannot be ran on Folia servers!"));
+            return true;
+        }
+
         if (sender instanceof ConsoleCommandSender) {
             sender.sendMessage(Component
                     .text("Command has to be run by a player"));

src/main/java/pw/kaboom/extras/modules/block/BlockPhysics.java

@@ -1,23 +1,19 @@
 package pw.kaboom.extras.modules.block;
 
-import java.util.HashSet;
-
+import com.destroystokyo.paper.event.block.BlockDestroyEvent;
 import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.block.BlockFace;
 import org.bukkit.entity.EntityType;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.Listener;
-import org.bukkit.event.block.BlockFadeEvent;
-import org.bukkit.event.block.BlockFormEvent;
-import org.bukkit.event.block.BlockFromToEvent;
-import org.bukkit.event.block.BlockPhysicsEvent;
-import org.bukkit.event.block.BlockRedstoneEvent;
+import org.bukkit.event.block.*;
 import org.bukkit.event.entity.EntityChangeBlockEvent;
-
-import com.destroystokyo.paper.event.block.BlockDestroyEvent;
-import org.bukkit.scheduler.BukkitScheduler;
 import pw.kaboom.extras.Main;
+import pw.kaboom.extras.platform.PlatformScheduler;
+
+import java.util.HashSet;
+import java.util.concurrent.TimeUnit;
 
 public final class BlockPhysics implements Listener {
 
@@ -178,8 +174,7 @@ public final class BlockPhysics implements Listener {
     }
 
     public static void init(final Main main) {
-        final BukkitScheduler scheduler = Bukkit.getScheduler();
-
-        scheduler.runTaskTimer(main, BlockPhysics::updateTPS, 0L, 1200L); // 1 minute
+        PlatformScheduler.runRepeating(main, BlockPhysics::updateTPS, 0L,
+                1L, TimeUnit.MINUTES);
     }
 }

src/main/java/pw/kaboom/extras/modules/player/PlayerConnection.java

@@ -1,9 +1,8 @@
 package pw.kaboom.extras.modules.player;
 
-import java.util.HashSet;
-import java.util.UUID;
-import java.util.concurrent.ThreadLocalRandom;
-
+import com.destroystokyo.paper.event.profile.PreLookupProfileEvent;
+import com.destroystokyo.paper.profile.ProfileProperty;
+import com.google.common.base.Charsets;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.Server;
@@ -11,27 +10,19 @@ import org.bukkit.World;
 import org.bukkit.configuration.file.FileConfiguration;
 import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
-import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
-import org.bukkit.event.player.AsyncPlayerPreLoginEvent;
-import org.bukkit.event.player.PlayerJoinEvent;
-import org.bukkit.event.player.PlayerKickEvent;
-import org.bukkit.event.player.PlayerLoginEvent;
+import org.bukkit.event.player.*;
 import org.bukkit.event.player.PlayerLoginEvent.Result;
-import org.bukkit.event.player.PlayerQuitEvent;
 import org.bukkit.plugin.java.JavaPlugin;
-
 import org.spigotmc.event.player.PlayerSpawnLocationEvent;
-
-import com.destroystokyo.paper.event.profile.PreLookupProfileEvent;
-import com.destroystokyo.paper.profile.ProfileProperty;
-
-import com.google.common.base.Charsets;
-
 import pw.kaboom.extras.Main;
 import pw.kaboom.extras.modules.server.ServerTabComplete;
 import pw.kaboom.extras.skin.SkinManager;
 
+import java.util.HashSet;
+import java.util.UUID;
+import java.util.concurrent.ThreadLocalRandom;
+
 public final class PlayerConnection implements Listener {
     private static final FileConfiguration CONFIG = JavaPlugin.getPlugin(Main.class).getConfig();
     private static final String TITLE = CONFIG.getString("playerJoinTitle");
@@ -119,9 +110,10 @@ public final class PlayerConnection implements Listener {
         }
 
         final Server server = Bukkit.getServer();
+        final Main plugin = JavaPlugin.getPlugin(Main.class);
 
 
-        if (!server.getOnlineMode()) {
+        if (!server.getOnlineMode() && !plugin.isFolia()) {
             SkinManager.applySkin(player, player.getName(), false);
         }
     }

src/main/java/pw/kaboom/extras/modules/player/PlayerPrefix.java

@@ -1,11 +1,5 @@
 package pw.kaboom.extras.modules.player;
 
-import java.io.File;
-import java.io.IOException;
-import java.util.Collection;
-import java.util.HashMap;
-import java.util.Map;
-import java.util.UUID;
 import net.kyori.adventure.text.Component;
 import net.kyori.adventure.text.serializer.legacy.LegacyComponentSerializer;
 import org.bukkit.Bukkit;
@@ -18,8 +12,16 @@ import org.bukkit.event.Listener;
 import org.bukkit.event.player.PlayerLoginEvent;
 import org.bukkit.event.player.PlayerQuitEvent;
 import org.bukkit.plugin.java.JavaPlugin;
-import org.bukkit.scheduler.BukkitScheduler;
 import pw.kaboom.extras.Main;
+import pw.kaboom.extras.platform.PlatformScheduler;
+
+import java.io.File;
+import java.io.IOException;
+import java.util.Collection;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+import java.util.concurrent.TimeUnit;
 
 public class PlayerPrefix implements Listener {
 	private static final Main plugin = JavaPlugin.getPlugin(Main.class);
@@ -42,12 +44,10 @@ public class PlayerPrefix implements Listener {
 		opTag = LegacyComponentSerializer.legacySection().deserialize(legacyOpTag);
 		deOpTag = LegacyComponentSerializer.legacySection().deserialize(legacyDeOpTag);
 
-		final BukkitScheduler scheduler = Bukkit.getScheduler();
-
-		scheduler.runTaskTimerAsynchronously(plugin, PlayerPrefix::checkOpStatus,
-			0L, 1L);
-		scheduler.runTaskTimerAsynchronously(plugin, PlayerPrefix::checkDisplayNames,
-			0L, 1L);
+		PlatformScheduler.runRepeating(plugin, PlayerPrefix::checkOpStatus,
+			0L, 20L, TimeUnit.MILLISECONDS);
+		PlatformScheduler.runRepeating(plugin, PlayerPrefix::checkDisplayNames,
+				0L, 20L, TimeUnit.MILLISECONDS);
 	}
 
 	public static void removePrefix(Player player) throws IOException {

src/main/java/pw/kaboom/extras/skin/SkinManager.java

@@ -1,6 +1,16 @@
 package pw.kaboom.extras.skin;
 
+import com.destroystokyo.paper.profile.PlayerProfile;
+import com.destroystokyo.paper.profile.ProfileProperty;
 import com.google.gson.Gson;
+import net.kyori.adventure.text.Component;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.java.JavaPlugin;
+import pw.kaboom.extras.Main;
+import pw.kaboom.extras.platform.PlatformScheduler;
+import pw.kaboom.extras.skin.response.ProfileResponse;
+import pw.kaboom.extras.skin.response.SkinResponse;
+
 import java.net.URI;
 import java.net.http.HttpClient;
 import java.net.http.HttpRequest;
@@ -8,25 +18,10 @@ import java.net.http.HttpResponse;
 import java.net.http.HttpResponse.BodyHandlers;
 import java.util.List;
 import java.util.UUID;
-
 import java.util.concurrent.CompletableFuture;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
-import org.bukkit.Bukkit;
-import org.bukkit.entity.Player;
-import org.bukkit.plugin.java.JavaPlugin;
-
-import com.destroystokyo.paper.profile.PlayerProfile;
-import com.destroystokyo.paper.profile.ProfileProperty;
-
-import net.kyori.adventure.text.Component;
-
-import org.bukkit.scheduler.BukkitScheduler;
-import pw.kaboom.extras.Main;
-import pw.kaboom.extras.skin.response.ProfileResponse;
-import pw.kaboom.extras.skin.response.SkinResponse;
-
 public final class SkinManager {
     private static final HttpClient httpClient = HttpClient.newHttpClient();
     private static final Gson GSON = new Gson();
@@ -34,14 +29,17 @@ public final class SkinManager {
         .newCachedThreadPool();
 
     public static void resetSkin(final Player player, final boolean shouldSendMessage) {
+        final Main plugin = JavaPlugin.getPlugin(Main.class);
+
+        if (plugin.isFolia()) {
+            return;
+        }
+
         executorService.submit(() -> {
             final PlayerProfile playerProfile = player.getPlayerProfile();
             playerProfile.removeProperty("textures");
 
-            final BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
-            final Main plugin = JavaPlugin.getPlugin(Main.class);
-
-            bukkitScheduler.runTask(plugin, () -> player.setPlayerProfile(playerProfile));
+            PlatformScheduler.runSync(plugin, () -> player.setPlayerProfile(playerProfile));
 
             if(!shouldSendMessage) {
                 return;
@@ -53,6 +51,12 @@ public final class SkinManager {
 
     public static void applySkin(final Player player, final String name,
         final boolean shouldSendMessage) {
+        final Main plugin = JavaPlugin.getPlugin(Main.class);
+
+        if (plugin.isFolia()) {
+            return;
+        }
+
         executorService.submit(() -> {
             final PlayerProfile profile = player.getPlayerProfile();
             final SkinData skinData;
@@ -72,10 +76,7 @@ public final class SkinManager {
             final String signature = skinData.signature();
             profile.setProperty(new ProfileProperty("textures", texture, signature));
 
-            final BukkitScheduler bukkitScheduler = Bukkit.getScheduler();
-            final Main plugin = JavaPlugin.getPlugin(Main.class);
-
-            bukkitScheduler.runTask(plugin,
+            PlatformScheduler.runSync(plugin,
                 () -> player.setPlayerProfile(profile));