input 1.3

.gitattributes

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+# Auto detect text files and perform LF normalization
+* text=auto

.gitignore

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+# User-specific stuff
+.idea/
+
+*.iml
+*.ipr
+*.iws
+
+# IntelliJ
+out/
+
+# Compiled class file
+*.class
+
+# Log file
+*.log
+
+# BlueJ files
+*.ctxt
+
+# Package Files #
+*.jar
+*.war
+*.nar
+*.ear
+*.zip
+*.tar.gz
+*.rar
+
+# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
+hs_err_pid*
+
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
+
+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+# General
+.DS_Store
+.AppleDouble
+.LSOverride
+
+# Icon must end with two \r
+Icon
+
+# Thumbnails
+._*
+
+# Files that might appear in the root of a volume
+.DocumentRevisions-V100
+.fseventsd
+.Spotlight-V100
+.TemporaryItems
+.Trashes
+.VolumeIcon.icns
+.com.apple.timemachine.donotpresent
+
+# Directories potentially created on remote AFP share
+.AppleDB
+.AppleDesktop
+Network Trash Folder
+Temporary Items
+.apdisk
+
+# Windows thumbnail cache files
+Thumbs.db
+Thumbs.db:encryptable
+ehthumbs.db
+ehthumbs_vista.db
+
+# Dump file
+*.stackdump
+
+# Folder config file
+[Dd]esktop.ini
+
+# Recycle Bin used on file shares
+$RECYCLE.BIN/
+
+# Windows Installer files
+*.cab
+*.msi
+*.msix
+*.msm
+*.msp
+
+# Windows shortcuts
+*.lnk
+
+target/
+
+pom.xml.tag
+pom.xml.releaseBackup
+pom.xml.versionsBackup
+pom.xml.next
+
+release.properties
+dependency-reduced-pom.xml
+buildNumber.properties
+.mvn/timing.properties
+.mvn/wrapper/maven-wrapper.jar
+.flattened-pom.xml
+
+# Common working directory
+run/

README.md

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+<p align="center">
+    <img src="https://i.imgur.com/UitOjTI.png" width="300">
+</p>
+
+---
+# Links
+* [Download](https://www.spigotmc.org/resources/wonderbagshop.89234/)
+* [Discord](http://dc.T2Code.net)
+
+--
+
+### English
+
+With PaPiTest you can query and test all placeholders of PlaceholderAPI and other plugins that use the PlaceholderAPI. This can also be very useful for programming testing.
+
+Just come to the support Discord for further questions.
+
+---
+
+### German
+
+Mit PaPiTest kannst du sämtliche Placeholder von PlaceholderAPI und anderen Plugins die die PlaceholderAPI nutzen abfragen und testen. Dies kann auch zum Programmieren zum Testen sehr nützlich sein.
+
+Komm für weitere Fragen einfach auf den Support Discord.

pom.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <modelVersion>4.0.0</modelVersion>
+
+    <groupId>de.jatitv</groupId>
+    <artifactId>PaPiTest</artifactId>
+    <version>0.0.1</version>
+    <packaging>jar</packaging>
+
+    <name>PaPiTest</name>
+
+    <description>Test your Placeholder</description>
+    <properties>
+        <java.version>1.8</java.version>
+        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
+    </properties>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-compiler-plugin</artifactId>
+                <version>3.8.1</version>
+                <configuration>
+                    <source>${java.version}</source>
+                    <target>${java.version}</target>
+                </configuration>
+            </plugin>
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.2.4</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <createDependencyReducedPom>false</createDependencyReducedPom>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
+        </plugins>
+        <resources>
+            <resource>
+                <directory>src/main/resources</directory>
+                <filtering>true</filtering>
+            </resource>
+        </resources>
+    </build>
+
+    <repositories>
+        <repository>
+            <id>spigotmc-repo</id>
+            <url>https://hub.spigotmc.org/nexus/content/repositories/snapshots/</url>
+        </repository>
+        <repository>
+            <id>sonatype</id>
+            <url>https://oss.sonatype.org/content/groups/public/</url>
+        </repository>
+        <repository>
+            <id>T2Code</id>
+            <url>https://repo.t2code.net/repository/T2Code/</url>
+        </repository>
+    </repositories>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.spigotmc</groupId>
+            <artifactId>spigot-api</artifactId>
+            <version>1.16.5-R0.1-SNAPSHOT</version>
+            <scope>provided</scope>
+        </dependency>
+        <dependency>
+            <groupId>net.t2code</groupId>
+            <artifactId>T2CodeLib</artifactId>
+            <version>11.4</version>
+        </dependency>
+    </dependencies>
+</project>

src/main/java/de/jatitv/papitest/Util.java

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+package de.jatitv.papitest;
+
+import net.t2code.lib.Spigot.Lib.minecraftVersion.MCVersion;
+
+public class Util {
+    private static double requiredT2CodeLibVersion = 11.4;
+    private static String prefix = "§8[§5PaPi§6Test§8]";
+    private static Integer spigotID = 90439;
+    private static Integer bstatsID = 10342;
+    private static String spigot = "https://www.spigotmc.org/resources/" + spigotID;
+    private static String discord = "http://dc.t2code.net";
+
+    public static double getRequiredT2CodeLibVersion() {
+        return requiredT2CodeLibVersion;
+    }
+
+    public static String getPrefix() {
+        return prefix;
+    }
+
+    public static Integer getSpigotID() {
+        return spigotID;
+    }
+
+    public static Integer getBstatsID() {
+        return bstatsID;
+    }
+
+    public static String getSpigot() {
+        return spigot;
+    }
+
+    public static String getDiscord() {
+        return discord;
+    }
+}

src/main/java/de/jatitv/papitest/commands/CmdExecuter.java

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+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.commands;
+
+import de.jatitv.papitest.Util;
+import de.jatitv.papitest.config.Config;
+import de.jatitv.papitest.system.Main;
+import me.clip.placeholderapi.PlaceholderAPI;
+import net.t2code.lib.Spigot.Lib.minecraftVersion.MCVersion;
+import net.t2code.lib.Spigot.Lib.plugins.PluginCheck;
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+import java.awt.color.CMMException;
+
+
+public class CmdExecuter implements CommandExecutor {
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        if (sender.hasPermission("papitest.admin") || sender.isOp()) {
+            if (args.length == 0) {
+                sender.sendMessage(Util.getPrefix() + " §cPlease use §6/papitest §7%placeholder%");
+            } else {
+                switch (args[0].toLowerCase()) {
+                    case "<placeholder>":
+                        sender.sendMessage(Util.getPrefix() + " §cPlease use §6/papitest §7%placeholder%");
+                        break;
+                    case "info":
+                    case "plugin":
+                    case "pl":
+                    case "version":
+                    case "ver":
+                        Commands.info(sender);
+                        break;
+                    case "reload":
+                    case "rl":
+                        Commands.reload(sender);
+                        break;
+                    default:
+                        Commands.use(sender, args);
+                        break;
+                }
+            }
+        } else {
+            sender.sendMessage(Util.getPrefix() + " §cYou do not have permission for §5PaPi§6Test§c!");
+        }
+        return false;
+    }
+}

src/main/java/de/jatitv/papitest/commands/Commands.java

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+package de.jatitv.papitest.commands;
+
+import de.jatitv.papitest.Util;
+import de.jatitv.papitest.config.Config;
+import de.jatitv.papitest.system.Main;
+import me.clip.placeholderapi.PlaceholderAPI;
+import net.t2code.lib.Spigot.Lib.messages.T2CodeTemplate;
+import net.t2code.lib.Spigot.Lib.minecraftVersion.MCVersion;
+import net.t2code.lib.Spigot.Lib.plugins.PluginCheck;
+import net.t2code.lib.Spigot.Lib.update.UpdateAPI;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+import java.util.Arrays;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class Commands {
+    protected static void info(CommandSender sender) {
+        T2CodeTemplate.sendInfo(sender, Util.getPrefix(), Util.getSpigot(), Util.getDiscord(), Main.autor, Main.version, UpdateAPI.PluginVersionen.get(Main.plugin.getName()).publicVersion);
+    }
+
+    protected static void reload(CommandSender sender) {
+        try {
+            Reload.reload(sender);
+        } catch (InterruptedException e) {
+            e.printStackTrace();
+        }
+    }
+
+    protected static void use(CommandSender sender, String[] args) {
+        if (!PluginCheck.papi()) {
+            Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + "§4\n" + Util.getPrefix() + " §4PlaceholderAPI could not be connected / found! " +
+                    "§9Please download it here: §6https://www.spigotmc.org/resources/placeholderapi.6245/§4\n" + Util.getPrefix());
+            if (sender instanceof Player) {
+                sender.sendMessage(Util.getPrefix() + "§4\n" + Util.getPrefix() + " §4PlaceholderAPI could not be connected / found! §9Please download it here: " +
+                        "§6https://www.spigotmc.org/resources/placeholderapi.6245/§4\n" + Util.getPrefix());
+            }
+            return;
+
+        }
+        List<String> results = Arrays.stream(args).filter(a -> a.contains("-p:")).collect(Collectors.toList());
+        CommandSender executor;
+        if(results.size() == 0){
+            executor = sender;
+        }else {
+            String targetSt = results.get(0).replace("-p:","");
+            Player target = Bukkit.getPlayer(targetSt);
+            if (target == null) {
+                sender.sendMessage(Util.getPrefix()+ " §4Player §6" + targetSt + " §4is not Online!");
+                return;
+            }
+            executor = target;
+        }
+        if(executor instanceof Player){
+            execute(sender,(Player)executor, args[0]);
+        }else {
+            sender.sendMessage(Util.getPrefix() + " §4If you want to execute the command via console, then you have to write §6-p:<player> §4to it, as which player you want to query the placeholder."); //todo
+        }
+    }
+    protected static void execute(CommandSender sender, Player target, String placeholder) {
+
+        sender.sendMessage(Util.getPrefix() + " §b" + placeholder + " §7-> " + "§6" + PlaceholderAPI.setPlaceholders(target, placeholder));
+        if (!MCVersion.minecraft1_8 && Config.Titel && sender instanceof Player) {
+            ((Player)sender).sendTitle("§5PaPi§6Test§8: " + "§b" + placeholder, "§6" + PlaceholderAPI.setPlaceholders(target, placeholder));
+        }
+    }
+}

src/main/java/de/jatitv/papitest/commands/Reload.java

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+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.commands;
+
+import de.jatitv.papitest.Util;
+import de.jatitv.papitest.config.Config;
+import de.jatitv.papitest.system.Main;
+import net.t2code.lib.Spigot.Lib.plugins.PluginCheck;
+import org.bukkit.Bukkit;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+
+public class Reload {
+
+    public static void reload(CommandSender sender) throws InterruptedException {
+        if (sender instanceof Player) {
+            sender.sendMessage(Util.getPrefix() + " §6Plugin reload...");
+        }
+
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §6Plugin reload...");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Config.configCreate();
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2");
+        if (PluginCheck.papi()) {
+            if (sender instanceof Player) {
+                sender.sendMessage(Util.getPrefix() + " §2PlaceholderAPI successfully connected!");
+                Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2PlaceholderAPI successfully connected!");
+            } else Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2PlaceholderAPI successfully connected!");
+        } else {
+            if (sender instanceof Player) {
+                sender.sendMessage(Util.getPrefix() + "§4\n" + Util.getPrefix() + " §4PlaceholderAPI could not be connected / found! " +
+                        "§9Please download it here: §6https://www.spigotmc.org/resources/placeholderapi.6245/§4\n" + Util.getPrefix());
+                Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + "§4\n" + Util.getPrefix() + " §4PlaceholderAPI could not be connected / found! " +
+                        "§9Please download it here: §6https://www.spigotmc.org/resources/placeholderapi.6245/§4\n" + Util.getPrefix());
+            } else Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + "§4\n" + Util.getPrefix() + " §4PlaceholderAPI could not be connected / found! " +
+                    "§9Please download it here: §6https://www.spigotmc.org/resources/placeholderapi.6245/§4\n" + Util.getPrefix());
+        }
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + "§2");
+        if (sender instanceof Player) {
+            sender.sendMessage(Util.getPrefix() + " §2Plugin successfully reloaded.");
+        }
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2Plugin successfully reloaded.");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+    }
+}

src/main/java/de/jatitv/papitest/commands/TabComplete.java

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+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.commands;
+
+import org.bukkit.Bukkit;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+import org.bukkit.entity.Player;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+
+public class TabComplete implements TabCompleter {
+
+    private static final HashMap<String, String> arg1 = new HashMap<String, String>() {{
+        put("<placeholder>", "papitest.admin");
+        put("info", "papitest.admin");
+        put("reload", "papitest.admin");
+    }};
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command cmd, String s, String[] args) {
+        List<String> list = new ArrayList<>();
+        if (sender instanceof Player) {
+            Player p = (Player) sender;
+            switch (args.length) {
+                case 1:
+                    for (String command : arg1.keySet()) {
+                        if (hasPermission(p, arg1.get(command)) && passend(command, args[0])) {
+                            list.add(command);
+                        }
+                    }
+                    break;
+                case 2:
+                    if (sender.hasPermission("papitest.admin")) {
+                        if (args[1].contains("-")) {
+                            if (args[1].contains("-p:")) {
+                                for (Player player : Bukkit.getOnlinePlayers()) {
+                                    if (passend("-p:" + player.getName(), args[1])) {
+                                        list.add("-p:" + player.getName());
+                                    }
+                                }
+                            } else {
+                                list.add("-p:");
+                            }
+                        }
+                    }
+                    break;
+            }
+        }
+        return list;
+    }
+
+    private static Boolean passend(String command, String arg) {
+        for (int i = 0; i < arg.toUpperCase().length(); i++) {
+            if (arg.toUpperCase().length() >= command.toUpperCase().length()) {
+                return false;
+            } else {
+                if (arg.toUpperCase().charAt(i) != command.toUpperCase().charAt(i)) {
+                    return false;
+                }
+            }
+        }
+        return true;
+    }
+
+
+    public static boolean hasPermission(Player player, String permission) {
+        if (player.isOp()) {
+            return true;
+        }
+        String[] Permissions = permission.split(";");
+        for (String perm : Permissions) {
+            if (player.hasPermission(perm)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

src/main/java/de/jatitv/papitest/config/Config.java

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+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.config;
+
+import de.jatitv.papitest.Util;
+import de.jatitv.papitest.system.Main;
+import net.t2code.lib.Spigot.Lib.minecraftVersion.MCVersion;
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+
+import java.io.File;
+import java.io.IOException;
+
+public class Config {
+
+    public static Integer ConfigVersion = 1;
+
+    public static Boolean UpdateCheckOnJoin = true;
+    public static Boolean Titel = true;
+
+    public static void configCreate() {
+
+        File configYML = new File(Main.thisp().getDataFolder().getPath(), "Config.yml");
+        YamlConfiguration yamlConfiguration = YamlConfiguration.loadConfiguration(configYML);
+
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §4Config.yml load...");
+
+        yamlConfiguration.set("ConfigVersion", ConfigVersion);
+
+        if (yamlConfiguration.contains("Plugin.UpdateCheckOnJoin")) {
+            UpdateCheckOnJoin = yamlConfiguration.getBoolean("Plugin.UpdateCheckOnJoin");
+        } else {
+            yamlConfiguration.set("Plugin.UpdateCheckOnJoin", true);
+            Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §4Setting §6UpdateCheckOnJoin §4was added to §9Config.yml§4!");
+        }
+        if (!MCVersion.minecraft1_8) {
+            if (yamlConfiguration.contains("Titel.Enable")) {
+                Titel = yamlConfiguration.getBoolean("Titel.Enable");
+            } else {
+                yamlConfiguration.set("Titel.Enable", true);
+                Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §4Setting §6Titel Enable §4was added to §9Config.yml§4!");
+            }
+        }
+
+        try {
+            yamlConfiguration.save(configYML);
+        } catch (
+                IOException e) {
+            e.printStackTrace();
+        }
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2Config.yml loaded successfully.");
+    }
+}

src/main/java/de/jatitv/papitest/system/JoinEvent.java

@@ -0,0 +1,23 @@
+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.system;
+
+import de.jatitv.papitest.Util;
+import de.jatitv.papitest.config.Config;
+import net.t2code.lib.Spigot.Lib.update.UpdateAPI;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerJoinEvent;
+import org.bukkit.scheduler.BukkitRunnable;
+
+public class JoinEvent implements Listener {
+
+
+    @EventHandler
+    public void onJoinEvent(PlayerJoinEvent event) {
+        Player player = event.getPlayer();
+
+        UpdateAPI.join(Main.plugin, Util.getPrefix(),"papitest.admin",player,Util.getSpigot(), Util.getDiscord());
+    }
+}

src/main/java/de/jatitv/papitest/system/Main.java

@@ -0,0 +1,96 @@
+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.system;
+
+import de.jatitv.papitest.Util;
+import de.jatitv.papitest.commands.CmdExecuter;
+import de.jatitv.papitest.commands.TabComplete;
+import de.jatitv.papitest.config.Config;
+import net.t2code.lib.Spigot.Lib.plugins.PluginCheck;
+import net.t2code.lib.Spigot.Lib.update.UpdateAPI;
+import org.bukkit.Bukkit;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+import org.bukkit.scheduler.BukkitRunnable;
+
+import java.util.List;
+import java.util.Objects;
+import java.util.logging.Level;
+
+public final class Main extends JavaPlugin {
+
+    public static Main plugin;
+    public static String version;
+    public static List<String> autor;
+
+    public static Main getPlugin() {
+        return plugin;
+    }
+
+    public static Plugin thisp() {
+        return plugin;
+    }
+
+    @Override
+    public void onEnable() {
+        // Plugin startup logic
+        plugin = this;
+        autor = plugin.getDescription().getAuthors();
+        version = plugin.getDescription().getVersion();
+
+        if (pluginNotFound("T2CodeLib", 96388, Util.getRequiredT2CodeLibVersion())) return;
+
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §4Plugin load...");
+
+        UpdateAPI.onUpdateCheck(Main.plugin, Util.getPrefix(), Util.getSpigot(), Util.getSpigotID(), Util.getDiscord());
+        Metrics.Bstats(Main.plugin, Util.getBstatsID());
+
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Config.configCreate();
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        if (PluginCheck.papi()) {
+            Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2PlaceholderAPI successfully connected!");
+        } else {
+            Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + "§4\n" + Util.getPrefix() + " §4PlaceholderAPI could not be connected / found! " +
+                    "§9Please download it here: §6https://www.spigotmc.org/resources/placeholderapi.6245/§4\n" + Util.getPrefix());
+        }
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2Plugin loaded successfully.");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §8-------------------------------");
+        Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §2Plugin loaded successfully.");
+
+        getCommand("papitest").setExecutor(new CmdExecuter());
+        getCommand("papitest").setTabCompleter(new TabComplete());
+        Bukkit.getServer().getPluginManager().registerEvents(new JoinEvent(), this);
+
+        int pluginId = 10767; // <-- Replace with the id of your plugin!
+        Metrics metrics = new Metrics(this, pluginId);
+
+
+    }
+
+    @Override
+    public void onDisable() {
+        // Plugin shutdown logic
+    }
+
+    public static Boolean pluginNotFound(String pl, Integer spigotID, double ver) {
+        if (Bukkit.getPluginManager().getPlugin(pl) == null) {
+            plugin.getLogger().log(Level.SEVERE, "Plugin can not be loaded!");
+            Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §e" + pl + " §4could not be found. Please download it here: " +
+                    "§6https://spigotmc.org/resources/" + pl + "." + spigotID + " §4to be able to use this plugin.");
+            plugin.getPluginLoader().disablePlugin(plugin);
+            return true;
+        } else {
+            if (Double.parseDouble(Objects.requireNonNull(Bukkit.getPluginManager().getPlugin(pl)).getDescription().getVersion()) < ver) {
+                plugin.getLogger().log(Level.SEVERE, "Plugin can not be loaded!");
+                Bukkit.getConsoleSender().sendMessage(Util.getPrefix() + " §e" + pl + " §4is out of date! This plugin requires at least version §2" +
+                        ver + " §4of §6" + pl + " §4Please update it here: §6https://spigotmc.org/resources/" + pl + "." + spigotID + " §4to use this version of " +
+                        plugin.getDescription().getName() + ".");
+                plugin.getPluginLoader().disablePlugin(plugin);
+                return true;
+            }
+            return false;
+        }
+    }
+}

src/main/java/de/jatitv/papitest/system/Metrics.java

@@ -0,0 +1,856 @@
+// This claas was created by JaTiTV
+
+package de.jatitv.papitest.system;
+
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
+import java.io.DataOutputStream;
+import java.io.File;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.lang.reflect.Method;
+import java.net.URL;
+import java.nio.charset.StandardCharsets;
+import java.util.Arrays;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.Map;
+import java.util.Objects;
+import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.Callable;
+import java.util.concurrent.Executors;
+import java.util.concurrent.ScheduledExecutorService;
+import java.util.concurrent.TimeUnit;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+import java.util.function.Supplier;
+import java.util.logging.Level;
+import java.util.stream.Collectors;
+import java.util.zip.GZIPOutputStream;
+import javax.net.ssl.HttpsURLConnection;
+
+import org.bukkit.Bukkit;
+import org.bukkit.configuration.file.YamlConfiguration;
+import org.bukkit.entity.Player;
+import org.bukkit.plugin.Plugin;
+import org.bukkit.plugin.java.JavaPlugin;
+
+public class Metrics {
+
+    public static void Bstats(Plugin plugin, int bstatsID) {
+        int pluginId = bstatsID; // <-- Replace with the id of your plugin!
+        Metrics metrics = new Metrics((JavaPlugin) plugin, pluginId);
+    }
+
+    private final Plugin plugin;
+
+    private final MetricsBase metricsBase;
+
+    /**
+     * Creates a new Metrics instance.
+     *
+     * @param plugin Your plugin instance.
+     * @param serviceId The id of the service. It can be found at <a
+     *     href="https://bstats.org/what-is-my-plugin-id">What is my plugin id?</a>
+     */
+    public Metrics(JavaPlugin plugin, int serviceId) {
+        this.plugin = plugin;
+        // Get the config file
+        File bStatsFolder = new File(plugin.getDataFolder().getParentFile(), "bStats");
+        File configFile = new File(bStatsFolder, "config.yml");
+        YamlConfiguration config = YamlConfiguration.loadConfiguration(configFile);
+        if (!config.isSet("serverUuid")) {
+            config.addDefault("enabled", true);
+            config.addDefault("serverUuid", UUID.randomUUID().toString());
+            config.addDefault("logFailedRequests", false);
+            config.addDefault("logSentData", false);
+            config.addDefault("logResponseStatusText", false);
+            // Inform the server owners about bStats
+            config
+                    .options()
+                    .header(
+                            "bStats (https://bStats.org) collects some basic information for plugin authors, like how\n"
+                                    + "many people use their plugin and their total player count. It's recommended to keep bStats\n"
+                                    + "enabled, but if you're not comfortable with this, you can turn this setting off. There is no\n"
+                                    + "performance penalty associated with having metrics enabled, and data sent to bStats is fully\n"
+                                    + "anonymous.")
+                    .copyDefaults(true);
+            try {
+                config.save(configFile);
+            } catch (IOException ignored) {
+            }
+        }
+        // Load the data
+        boolean enabled = config.getBoolean("enabled", true);
+        String serverUUID = config.getString("serverUuid");
+        boolean logErrors = config.getBoolean("logFailedRequests", false);
+        boolean logSentData = config.getBoolean("logSentData", false);
+        boolean logResponseStatusText = config.getBoolean("logResponseStatusText", false);
+        metricsBase =
+                new MetricsBase(
+                        "bukkit",
+                        serverUUID,
+                        serviceId,
+                        enabled,
+                        this::appendPlatformData,
+                        this::appendServiceData,
+                        submitDataTask -> Bukkit.getScheduler().runTask(plugin, submitDataTask),
+                        plugin::isEnabled,
+                        (message, error) -> this.plugin.getLogger().log(Level.WARNING, message, error),
+                        (message) -> this.plugin.getLogger().log(Level.INFO, message),
+                        logErrors,
+                        logSentData,
+                        logResponseStatusText);
+    }
+
+    /**
+     * Adds a custom chart.
+     *
+     * @param chart The chart to add.
+     */
+    public void addCustomChart(CustomChart chart) {
+        metricsBase.addCustomChart(chart);
+    }
+
+    private void appendPlatformData(JsonObjectBuilder builder) {
+        builder.appendField("playerAmount", getPlayerAmount());
+        builder.appendField("onlineMode", Bukkit.getOnlineMode() ? 1 : 0);
+        builder.appendField("bukkitVersion", Bukkit.getVersion());
+        builder.appendField("bukkitName", Bukkit.getName());
+        builder.appendField("javaVersion", System.getProperty("java.version"));
+        builder.appendField("osName", System.getProperty("os.name"));
+        builder.appendField("osArch", System.getProperty("os.arch"));
+        builder.appendField("osVersion", System.getProperty("os.version"));
+        builder.appendField("coreCount", Runtime.getRuntime().availableProcessors());
+    }
+
+    private void appendServiceData(JsonObjectBuilder builder) {
+        builder.appendField("pluginVersion", plugin.getDescription().getVersion());
+    }
+
+    private int getPlayerAmount() {
+        try {
+            // Around MC 1.8 the return type was changed from an array to a collection,
+            // This fixes java.lang.NoSuchMethodError:
+            // org.bukkit.Bukkit.getOnlinePlayers()Ljava/util/Collection;
+            Method onlinePlayersMethod = Class.forName("org.bukkit.Server").getMethod("getOnlinePlayers");
+            return onlinePlayersMethod.getReturnType().equals(Collection.class)
+                    ? ((Collection<?>) onlinePlayersMethod.invoke(Bukkit.getServer())).size()
+                    : ((Player[]) onlinePlayersMethod.invoke(Bukkit.getServer())).length;
+        } catch (Exception e) {
+            // Just use the new method if the reflection failed
+            return Bukkit.getOnlinePlayers().size();
+        }
+    }
+
+    public static class MetricsBase {
+
+        /** The version of the Metrics class. */
+        public static final String METRICS_VERSION = "2.2.1";
+
+        private static final ScheduledExecutorService scheduler =
+                Executors.newScheduledThreadPool(1, task -> new Thread(task, "bStats-Metrics"));
+
+        private static final String REPORT_URL = "https://bStats.org/api/v2/data/%s";
+
+        private final String platform;
+
+        private final String serverUuid;
+
+        private final int serviceId;
+
+        private final Consumer<JsonObjectBuilder> appendPlatformDataConsumer;
+
+        private final Consumer<JsonObjectBuilder> appendServiceDataConsumer;
+
+        private final Consumer<Runnable> submitTaskConsumer;
+
+        private final Supplier<Boolean> checkServiceEnabledSupplier;
+
+        private final BiConsumer<String, Throwable> errorLogger;
+
+        private final Consumer<String> infoLogger;
+
+        private final boolean logErrors;
+
+        private final boolean logSentData;
+
+        private final boolean logResponseStatusText;
+
+        private final Set<CustomChart> customCharts = new HashSet<>();
+
+        private final boolean enabled;
+
+        /**
+         * Creates a new MetricsBase class instance.
+         *
+         * @param platform The platform of the service.
+         * @param serviceId The id of the service.
+         * @param serverUuid The server uuid.
+         * @param enabled Whether or not data sending is enabled.
+         * @param appendPlatformDataConsumer A consumer that receives a {@code JsonObjectBuilder} and
+         *     appends all platform-specific data.
+         * @param appendServiceDataConsumer A consumer that receives a {@code JsonObjectBuilder} and
+         *     appends all service-specific data.
+         * @param submitTaskConsumer A consumer that takes a runnable with the submit task. This can be
+         *     used to delegate the data collection to a another thread to prevent errors caused by
+         *     concurrency. Can be {@code null}.
+         * @param checkServiceEnabledSupplier A supplier to check if the service is still enabled.
+         * @param errorLogger A consumer that accepts log message and an error.
+         * @param infoLogger A consumer that accepts info log messages.
+         * @param logErrors Whether or not errors should be logged.
+         * @param logSentData Whether or not the sent data should be logged.
+         * @param logResponseStatusText Whether or not the response status text should be logged.
+         */
+        public MetricsBase(
+                String platform,
+                String serverUuid,
+                int serviceId,
+                boolean enabled,
+                Consumer<JsonObjectBuilder> appendPlatformDataConsumer,
+                Consumer<JsonObjectBuilder> appendServiceDataConsumer,
+                Consumer<Runnable> submitTaskConsumer,
+                Supplier<Boolean> checkServiceEnabledSupplier,
+                BiConsumer<String, Throwable> errorLogger,
+                Consumer<String> infoLogger,
+                boolean logErrors,
+                boolean logSentData,
+                boolean logResponseStatusText) {
+            this.platform = platform;
+            this.serverUuid = serverUuid;
+            this.serviceId = serviceId;
+            this.enabled = enabled;
+            this.appendPlatformDataConsumer = appendPlatformDataConsumer;
+            this.appendServiceDataConsumer = appendServiceDataConsumer;
+            this.submitTaskConsumer = submitTaskConsumer;
+            this.checkServiceEnabledSupplier = checkServiceEnabledSupplier;
+            this.errorLogger = errorLogger;
+            this.infoLogger = infoLogger;
+            this.logErrors = logErrors;
+            this.logSentData = logSentData;
+            this.logResponseStatusText = logResponseStatusText;
+            checkRelocation();
+            if (enabled) {
+                startSubmitting();
+            }
+        }
+
+        public void addCustomChart(CustomChart chart) {
+            this.customCharts.add(chart);
+        }
+
+        private void startSubmitting() {
+            final Runnable submitTask =
+                    () -> {
+                        if (!enabled || !checkServiceEnabledSupplier.get()) {
+                            // Submitting data or service is disabled
+                            scheduler.shutdown();
+                            return;
+                        }
+                        if (submitTaskConsumer != null) {
+                            submitTaskConsumer.accept(this::submitData);
+                        } else {
+                            this.submitData();
+                        }
+                    };
+            // Many servers tend to restart at a fixed time at xx:00 which causes an uneven distribution
+            // of requests on the
+            // bStats backend. To circumvent this problem, we introduce some randomness into the initial
+            // and second delay.
+            // WARNING: You must not modify and part of this Metrics class, including the submit delay or
+            // frequency!
+            // WARNING: Modifying this code will get your plugin banned on bStats. Just don't do it!
+            long initialDelay = (long) (1000 * 60 * (3 + Math.random() * 3));
+            long secondDelay = (long) (1000 * 60 * (Math.random() * 30));
+            scheduler.schedule(submitTask, initialDelay, TimeUnit.MILLISECONDS);
+            scheduler.scheduleAtFixedRate(
+                    submitTask, initialDelay + secondDelay, 1000 * 60 * 30, TimeUnit.MILLISECONDS);
+        }
+
+        private void submitData() {
+            final JsonObjectBuilder baseJsonBuilder = new JsonObjectBuilder();
+            appendPlatformDataConsumer.accept(baseJsonBuilder);
+            final JsonObjectBuilder serviceJsonBuilder = new JsonObjectBuilder();
+            appendServiceDataConsumer.accept(serviceJsonBuilder);
+            JsonObjectBuilder.JsonObject[] chartData =
+                    customCharts.stream()
+                            .map(customChart -> customChart.getRequestJsonObject(errorLogger, logErrors))
+                            .filter(Objects::nonNull)
+                            .toArray(JsonObjectBuilder.JsonObject[]::new);
+            serviceJsonBuilder.appendField("id", serviceId);
+            serviceJsonBuilder.appendField("customCharts", chartData);
+            baseJsonBuilder.appendField("service", serviceJsonBuilder.build());
+            baseJsonBuilder.appendField("serverUUID", serverUuid);
+            baseJsonBuilder.appendField("metricsVersion", METRICS_VERSION);
+            JsonObjectBuilder.JsonObject data = baseJsonBuilder.build();
+            scheduler.execute(
+                    () -> {
+                        try {
+                            // Send the data
+                            sendData(data);
+                        } catch (Exception e) {
+                            // Something went wrong! :(
+                            if (logErrors) {
+                                errorLogger.accept("Could not submit bStats metrics data", e);
+                            }
+                        }
+                    });
+        }
+
+        private void sendData(JsonObjectBuilder.JsonObject data) throws Exception {
+            if (logSentData) {
+                infoLogger.accept("Sent bStats metrics data: " + data.toString());
+            }
+            String url = String.format(REPORT_URL, platform);
+            HttpsURLConnection connection = (HttpsURLConnection) new URL(url).openConnection();
+            // Compress the data to save bandwidth
+            byte[] compressedData = compress(data.toString());
+            connection.setRequestMethod("POST");
+            connection.addRequestProperty("Accept", "application/json");
+            connection.addRequestProperty("Connection", "close");
+            connection.addRequestProperty("Content-Encoding", "gzip");
+            connection.addRequestProperty("Content-Length", String.valueOf(compressedData.length));
+            connection.setRequestProperty("Content-Type", "application/json");
+            connection.setRequestProperty("User-Agent", "Metrics-Service/1");
+            connection.setDoOutput(true);
+            try (DataOutputStream outputStream = new DataOutputStream(connection.getOutputStream())) {
+                outputStream.write(compressedData);
+            }
+            StringBuilder builder = new StringBuilder();
+            try (BufferedReader bufferedReader =
+                         new BufferedReader(new InputStreamReader(connection.getInputStream()))) {
+                String line;
+                while ((line = bufferedReader.readLine()) != null) {
+                    builder.append(line);
+                }
+            }
+            if (logResponseStatusText) {
+                infoLogger.accept("Sent data to bStats and received response: " + builder);
+            }
+        }
+
+        /** Checks that the class was properly relocated. */
+        private void checkRelocation() {
+            // You can use the property to disable the check in your test environment
+            if (System.getProperty("bstats.relocatecheck") == null
+                    || !System.getProperty("bstats.relocatecheck").equals("false")) {
+                // Maven's Relocate is clever and changes strings, too. So we have to use this little
+                // "trick" ... :D
+                final String defaultPackage =
+                        new String(new byte[] {'o', 'r', 'g', '.', 'b', 's', 't', 'a', 't', 's'});
+                final String examplePackage =
+                        new String(new byte[] {'y', 'o', 'u', 'r', '.', 'p', 'a', 'c', 'k', 'a', 'g', 'e'});
+                // We want to make sure no one just copy & pastes the example and uses the wrong package
+                // names
+                if (MetricsBase.class.getPackage().getName().startsWith(defaultPackage)
+                        || MetricsBase.class.getPackage().getName().startsWith(examplePackage)) {
+                    throw new IllegalStateException("bStats Metrics class has not been relocated correctly!");
+                }
+            }
+        }
+
+        /**
+         * Gzips the given string.
+         *
+         * @param str The string to gzip.
+         * @return The gzipped string.
+         */
+        private static byte[] compress(final String str) throws IOException {
+            if (str == null) {
+                return null;
+            }
+            ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+            try (GZIPOutputStream gzip = new GZIPOutputStream(outputStream)) {
+                gzip.write(str.getBytes(StandardCharsets.UTF_8));
+            }
+            return outputStream.toByteArray();
+        }
+    }
+
+    public static class AdvancedBarChart extends CustomChart {
+
+        private final Callable<Map<String, int[]>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public AdvancedBarChart(String chartId, Callable<Map<String, int[]>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, int[]> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, int[]> entry : map.entrySet()) {
+                if (entry.getValue().length == 0) {
+                    // Skip this invalid
+                    continue;
+                }
+                allSkipped = false;
+                valuesBuilder.appendField(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public static class SimpleBarChart extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SimpleBarChart(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                valuesBuilder.appendField(entry.getKey(), new int[] {entry.getValue()});
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public static class MultiLineChart extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public MultiLineChart(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                if (entry.getValue() == 0) {
+                    // Skip this invalid
+                    continue;
+                }
+                allSkipped = false;
+                valuesBuilder.appendField(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public static class AdvancedPie extends CustomChart {
+
+        private final Callable<Map<String, Integer>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public AdvancedPie(String chartId, Callable<Map<String, Integer>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Integer> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean allSkipped = true;
+            for (Map.Entry<String, Integer> entry : map.entrySet()) {
+                if (entry.getValue() == 0) {
+                    // Skip this invalid
+                    continue;
+                }
+                allSkipped = false;
+                valuesBuilder.appendField(entry.getKey(), entry.getValue());
+            }
+            if (allSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    public abstract static class CustomChart {
+
+        private final String chartId;
+
+        protected CustomChart(String chartId) {
+            if (chartId == null) {
+                throw new IllegalArgumentException("chartId must not be null");
+            }
+            this.chartId = chartId;
+        }
+
+        public JsonObjectBuilder.JsonObject getRequestJsonObject(
+                BiConsumer<String, Throwable> errorLogger, boolean logErrors) {
+            JsonObjectBuilder builder = new JsonObjectBuilder();
+            builder.appendField("chartId", chartId);
+            try {
+                JsonObjectBuilder.JsonObject data = getChartData();
+                if (data == null) {
+                    // If the data is null we don't send the chart.
+                    return null;
+                }
+                builder.appendField("data", data);
+            } catch (Throwable t) {
+                if (logErrors) {
+                    errorLogger.accept("Failed to get data for custom chart with id " + chartId, t);
+                }
+                return null;
+            }
+            return builder.build();
+        }
+
+        protected abstract JsonObjectBuilder.JsonObject getChartData() throws Exception;
+    }
+
+    public static class SingleLineChart extends CustomChart {
+
+        private final Callable<Integer> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SingleLineChart(String chartId, Callable<Integer> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            int value = callable.call();
+            if (value == 0) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("value", value).build();
+        }
+    }
+
+    public static class SimplePie extends CustomChart {
+
+        private final Callable<String> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public SimplePie(String chartId, Callable<String> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        protected JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            String value = callable.call();
+            if (value == null || value.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("value", value).build();
+        }
+    }
+
+    public static class DrilldownPie extends CustomChart {
+
+        private final Callable<Map<String, Map<String, Integer>>> callable;
+
+        /**
+         * Class constructor.
+         *
+         * @param chartId The id of the chart.
+         * @param callable The callable which is used to request the chart data.
+         */
+        public DrilldownPie(String chartId, Callable<Map<String, Map<String, Integer>>> callable) {
+            super(chartId);
+            this.callable = callable;
+        }
+
+        @Override
+        public JsonObjectBuilder.JsonObject getChartData() throws Exception {
+            JsonObjectBuilder valuesBuilder = new JsonObjectBuilder();
+            Map<String, Map<String, Integer>> map = callable.call();
+            if (map == null || map.isEmpty()) {
+                // Null = skip the chart
+                return null;
+            }
+            boolean reallyAllSkipped = true;
+            for (Map.Entry<String, Map<String, Integer>> entryValues : map.entrySet()) {
+                JsonObjectBuilder valueBuilder = new JsonObjectBuilder();
+                boolean allSkipped = true;
+                for (Map.Entry<String, Integer> valueEntry : map.get(entryValues.getKey()).entrySet()) {
+                    valueBuilder.appendField(valueEntry.getKey(), valueEntry.getValue());
+                    allSkipped = false;
+                }
+                if (!allSkipped) {
+                    reallyAllSkipped = false;
+                    valuesBuilder.appendField(entryValues.getKey(), valueBuilder.build());
+                }
+            }
+            if (reallyAllSkipped) {
+                // Null = skip the chart
+                return null;
+            }
+            return new JsonObjectBuilder().appendField("values", valuesBuilder.build()).build();
+        }
+    }
+
+    /**
+     * An extremely simple JSON builder.
+     *
+     * <p>While this class is neither feature-rich nor the most performant one, it's sufficient enough
+     * for its use-case.
+     */
+    public static class JsonObjectBuilder {
+
+        private StringBuilder builder = new StringBuilder();
+
+        private boolean hasAtLeastOneField = false;
+
+        public JsonObjectBuilder() {
+            builder.append("{");
+        }
+
+        /**
+         * Appends a null field to the JSON.
+         *
+         * @param key The key of the field.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendNull(String key) {
+            appendFieldUnescaped(key, "null");
+            return this;
+        }
+
+        /**
+         * Appends a string field to the JSON.
+         *
+         * @param key The key of the field.
+         * @param value The value of the field.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, String value) {
+            if (value == null) {
+                throw new IllegalArgumentException("JSON value must not be null");
+            }
+            appendFieldUnescaped(key, "\"" + escape(value) + "\"");
+            return this;
+        }
+
+        /**
+         * Appends an integer field to the JSON.
+         *
+         * @param key The key of the field.
+         * @param value The value of the field.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, int value) {
+            appendFieldUnescaped(key, String.valueOf(value));
+            return this;
+        }
+
+        /**
+         * Appends an object to the JSON.
+         *
+         * @param key The key of the field.
+         * @param object The object.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, JsonObject object) {
+            if (object == null) {
+                throw new IllegalArgumentException("JSON object must not be null");
+            }
+            appendFieldUnescaped(key, object.toString());
+            return this;
+        }
+
+        /**
+         * Appends a string array to the JSON.
+         *
+         * @param key The key of the field.
+         * @param values The string array.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, String[] values) {
+            if (values == null) {
+                throw new IllegalArgumentException("JSON values must not be null");
+            }
+            String escapedValues =
+                    Arrays.stream(values)
+                            .map(value -> "\"" + escape(value) + "\"")
+                            .collect(Collectors.joining(","));
+            appendFieldUnescaped(key, "[" + escapedValues + "]");
+            return this;
+        }
+
+        /**
+         * Appends an integer array to the JSON.
+         *
+         * @param key The key of the field.
+         * @param values The integer array.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, int[] values) {
+            if (values == null) {
+                throw new IllegalArgumentException("JSON values must not be null");
+            }
+            String escapedValues =
+                    Arrays.stream(values).mapToObj(String::valueOf).collect(Collectors.joining(","));
+            appendFieldUnescaped(key, "[" + escapedValues + "]");
+            return this;
+        }
+
+        /**
+         * Appends an object array to the JSON.
+         *
+         * @param key The key of the field.
+         * @param values The integer array.
+         * @return A reference to this object.
+         */
+        public JsonObjectBuilder appendField(String key, JsonObject[] values) {
+            if (values == null) {
+                throw new IllegalArgumentException("JSON values must not be null");
+            }
+            String escapedValues =
+                    Arrays.stream(values).map(JsonObject::toString).collect(Collectors.joining(","));
+            appendFieldUnescaped(key, "[" + escapedValues + "]");
+            return this;
+        }
+
+        /**
+         * Appends a field to the object.
+         *
+         * @param key The key of the field.
+         * @param escapedValue The escaped value of the field.
+         */
+        private void appendFieldUnescaped(String key, String escapedValue) {
+            if (builder == null) {
+                throw new IllegalStateException("JSON has already been built");
+            }
+            if (key == null) {
+                throw new IllegalArgumentException("JSON key must not be null");
+            }
+            if (hasAtLeastOneField) {
+                builder.append(",");
+            }
+            builder.append("\"").append(escape(key)).append("\":").append(escapedValue);
+            hasAtLeastOneField = true;
+        }
+
+        /**
+         * Builds the JSON string and invalidates this builder.
+         *
+         * @return The built JSON string.
+         */
+        public JsonObject build() {
+            if (builder == null) {
+                throw new IllegalStateException("JSON has already been built");
+            }
+            JsonObject object = new JsonObject(builder.append("}").toString());
+            builder = null;
+            return object;
+        }
+
+        /**
+         * Escapes the given string like stated in https://www.ietf.org/rfc/rfc4627.txt.
+         *
+         * <p>This method escapes only the necessary characters '"', '\'. and '\u0000' - '\u001F'.
+         * Compact escapes are not used (e.g., '\n' is escaped as "\u000a" and not as "\n").
+         *
+         * @param value The value to escape.
+         * @return The escaped value.
+         */
+        private static String escape(String value) {
+            final StringBuilder builder = new StringBuilder();
+            for (int i = 0; i < value.length(); i++) {
+                char c = value.charAt(i);
+                if (c == '"') {
+                    builder.append("\\\"");
+                } else if (c == '\\') {
+                    builder.append("\\\\");
+                } else if (c <= '\u000F') {
+                    builder.append("\\u000").append(Integer.toHexString(c));
+                } else if (c <= '\u001F') {
+                    builder.append("\\u00").append(Integer.toHexString(c));
+                } else {
+                    builder.append(c);
+                }
+            }
+            return builder.toString();
+        }
+
+        /**
+         * A super simple representation of a JSON object.
+         *
+         * <p>This class only exists to make methods of the {@link JsonObjectBuilder} type-safe and not
+         * allow a raw string inputs for methods like {@link JsonObjectBuilder#appendField(String,
+         * JsonObject)}.
+         */
+        public static class JsonObject {
+
+            private final String value;
+
+            private JsonObject(String value) {
+                this.value = value;
+            }
+
+            @Override
+            public String toString() {
+                return value;
+            }
+        }
+    }
+}

src/main/resources/plugin.yml

@@ -0,0 +1,17 @@
+name: PaPiTest
+prefix: PaPiTest
+version: 1.3
+api-version: 1.13
+main: de.jatitv.papitest.system.Main
+softdepend: [ T2CodeLib, PlaceholderAPI ]
+authors: [ JaTiTV ]
+description: With PaPiTest you can query and test all placeholders of PlaceholderAPI and other plugins that use the PlaceholderAPI. This can also be very useful for programming testing.
+website: https://www.spigotmc.org/resources/papitest.90439/
+commands:
+  papitest:
+    description: Test and view a placeholder.
+
+permissions:
+  papitest.admin:
+    description: Test and view a placeholder.
+    default: op