From 7a7d797401cbff7dd3e81d5f63061acccccb911c Mon Sep 17 00:00:00 2001
From: Teriuihi <teriuihi@alttd.com>
Date: Fri, 10 Sep 2021 19:31:36 +0200
Subject: [PATCH] Initial commit ProxyDiscordLink

---
 .gitignore                                    |   7 +
 .../alttd/proxydiscordlink/DiscordLink.java   |  92 ++++++
 .../commands/DiscordCommand.java              |  92 ++++++
 .../proxydiscordlink/commands/SubCommand.java |  19 ++
 .../commands/subcommands/CheckLinked.java     |  79 +++++
 .../commands/subcommands/Link.java            |  77 +++++
 .../commands/subcommands/Unlink.java          |  70 +++++
 .../alttd/proxydiscordlink/config/Config.java | 220 +++++++++++++
 .../proxydiscordlink/database/Database.java   | 295 ++++++++++++++++++
 .../database/DatabaseConnection.java          |  49 +++
 .../proxydiscordlink/events/playerJoin.java   |  52 +++
 .../proxydiscordlink/events/playerLeave.java  |  23 ++
 .../alttd/proxydiscordlink/util/ALogger.java  |  29 ++
 .../alttd/proxydiscordlink/util/Cache.java    |  28 ++
 .../proxydiscordlink/util/Utilities.java      |  89 ++++++
 15 files changed, 1221 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/DiscordLink.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/commands/DiscordCommand.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/commands/SubCommand.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/commands/subcommands/CheckLinked.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Link.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Unlink.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/config/Config.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/database/Database.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/database/DatabaseConnection.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/events/playerJoin.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/events/playerLeave.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/util/ALogger.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/util/Cache.java
 create mode 100644 src/main/java/com/alttd/proxydiscordlink/util/Utilities.java

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..71dd23b
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+.idea/
+*.iml
+*.bat
+*.xml
+target/
+src/test/
+src/main/resources/
\ No newline at end of file
diff --git a/src/main/java/com/alttd/proxydiscordlink/DiscordLink.java b/src/main/java/com/alttd/proxydiscordlink/DiscordLink.java
new file mode 100644
index 0000000..6724426
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/DiscordLink.java
@@ -0,0 +1,92 @@
+package com.alttd.proxydiscordlink;
+
+import com.alttd.proxydiscordlink.commands.DiscordCommand;
+import com.alttd.proxydiscordlink.config.Config;
+import com.alttd.proxydiscordlink.database.Database;
+import com.alttd.proxydiscordlink.database.DatabaseConnection;
+import com.alttd.proxydiscordlink.util.ALogger;
+import com.alttd.proxydiscordlink.util.Cache;
+import com.google.inject.Inject;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.proxy.ProxyInitializeEvent;
+import com.velocitypowered.api.plugin.Plugin;
+import com.velocitypowered.api.plugin.annotation.DataDirectory;
+import com.velocitypowered.api.proxy.ProxyServer;
+
+import java.io.File;
+import java.nio.file.Path;
+import java.sql.SQLException;
+import java.util.logging.Logger;
+
+@Plugin(id = "proxydiscordlink", name = "ProxyDiscordLink", version = "1.0.0",
+        description = "A plugin that links Discord accounts with uuid's",
+        authors = {"Teri"}
+)
+public class DiscordLink {
+
+    private static DiscordLink plugin;
+    private final ProxyServer server;
+    private final Logger logger;
+    private final Path dataDirectory;
+    private final Database database;
+    private final Cache cache;
+
+    @Inject
+    public DiscordLink(ProxyServer proxyServer, Logger proxyLogger, @DataDirectory Path proxydataDirectory)
+    {
+        plugin = this;
+        server = proxyServer;
+        logger = proxyLogger;
+        dataDirectory = proxydataDirectory;
+        database = new Database();
+        cache = new Cache();
+    }
+
+    @Subscribe
+    public void onProxyInitialization(ProxyInitializeEvent event) {
+        ALogger.init(logger);
+        ReloadConfig();
+        try {
+            DatabaseConnection.initialize();
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+            getLogger().severe("*** Could not connect to the database. ***");
+            getLogger().severe("*** This plugin will be disabled. ***");
+            //TODO shutdown plugin
+        }
+        loadCommands();
+    }
+
+    public void ReloadConfig() {
+        Config.init();
+        ALogger.info("Reloaded DiscordLink config.");
+    }
+
+    public void loadCommands() {// all (proxy)commands go here
+        server.getCommandManager().register("discord", new DiscordCommand(), "discordlink");
+    }
+
+    public File getDataDirectory() {
+        return dataDirectory.toFile();
+    }
+
+    public static DiscordLink getPlugin() {
+        return plugin;
+    }
+
+    public Logger getLogger() {
+        return logger;
+    }
+
+    public ProxyServer getProxy() {
+        return server;
+    }
+
+    public Database getDatabase() {
+        return database;
+    }
+
+    public Cache getCache() {
+        return cache;
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/commands/DiscordCommand.java b/src/main/java/com/alttd/proxydiscordlink/commands/DiscordCommand.java
new file mode 100644
index 0000000..e98bd6a
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/commands/DiscordCommand.java
@@ -0,0 +1,92 @@
+package com.alttd.proxydiscordlink.commands;
+
+import com.alttd.proxydiscordlink.commands.subcommands.CheckLinked;
+import com.alttd.proxydiscordlink.commands.subcommands.Link;
+import com.alttd.proxydiscordlink.commands.subcommands.Unlink;
+import com.alttd.proxydiscordlink.config.Config;
+import com.mojang.brigadier.arguments.StringArgumentType;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.command.SimpleCommand;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.Template;
+
+import java.util.ArrayList;
+import java.util.Arrays;
+import java.util.List;
+
+public class DiscordCommand implements SimpleCommand {
+
+    private final List<SubCommand> subCommands;
+    private final MiniMessage miniMessage;
+
+    public DiscordCommand() {
+        subCommands = Arrays.asList(new CheckLinked(), new Link(), new Unlink());
+        miniMessage = MiniMessage.get();
+    }
+
+    @Override
+    public void execute(Invocation invocation) {
+        String[] args = invocation.arguments();
+        CommandSource source = invocation.source();
+
+        if (args.length < 1) {
+            if (!source.hasPermission("discordlink.link"))
+                source.sendMessage(miniMessage.parse(Config.NO_PERMISSION));
+            else
+                source.sendMessage(miniMessage.parse(Config.DISCORD_LINK));
+            return;
+        }
+
+        subCommands.stream()
+                .filter(subCommand -> subCommand.getName().equalsIgnoreCase(args[0]))
+                .findFirst()
+                .ifPresentOrElse(subCommand -> subCommand.execute(args, source)
+                        , () -> source.sendMessage(getHelpMessage(source)));
+    }
+
+    @Override
+    public List<String> suggest(Invocation invocation) {
+        String[] args = invocation.arguments();
+        List<String> suggest = new ArrayList<>();
+
+        if (args.length == 0) {
+            subCommands.forEach(subCommand -> suggest.add(subCommand.getName()));
+        } else if (args.length <= 1) {
+            subCommands.stream().filter(subCommand -> subCommand.getName().startsWith(args[0].toLowerCase()))
+                    .forEach(subCommand -> suggest.add(subCommand.getName()));
+        } else {
+            subCommands.stream().filter(subCommand -> subCommand.getName().equalsIgnoreCase(args[0])).findFirst()
+                    .ifPresent(subCommand -> suggest.addAll(subCommand.suggest(args)));
+        }
+
+        if (args.length == 0)
+            return suggest;
+        else
+            return finalizeSuggest(suggest, args[args.length - 1]);
+    }
+
+    public List<String> finalizeSuggest(List<String> possibleValues, String remaining) {
+        List<String> finalValues = new ArrayList<>();
+
+        for (String str : possibleValues) {
+            if (str.toLowerCase().startsWith(remaining)) {
+                finalValues.add(StringArgumentType.escapeIfRequired(str));
+            }
+        }
+
+        return finalValues;
+    }
+
+    private Component getHelpMessage(CommandSource source) {
+        StringBuilder stringBuilder = new StringBuilder();
+
+        subCommands.stream()
+                .filter(subCommand -> source.hasPermission(subCommand.getPermission()))
+                .forEach(subCommand -> stringBuilder.append(subCommand.getHelpMessage()).append("\n"));
+        if (stringBuilder.length() != 0)
+            stringBuilder.replace(stringBuilder.length() - 1, stringBuilder.length(), "");
+
+        return miniMessage.parse(Config.HELP_MESSAGE, Template.of("commands", stringBuilder.toString()));
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/commands/SubCommand.java b/src/main/java/com/alttd/proxydiscordlink/commands/SubCommand.java
new file mode 100644
index 0000000..36d8f71
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/commands/SubCommand.java
@@ -0,0 +1,19 @@
+package com.alttd.proxydiscordlink.commands;
+
+import com.velocitypowered.api.command.CommandSource;
+
+import java.util.List;
+
+public interface SubCommand {
+
+    String getName();
+
+    String getPermission();
+
+    void execute(String[] args, CommandSource source);
+
+    List<String> suggest(String[] args);
+
+    String getHelpMessage();
+
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/CheckLinked.java b/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/CheckLinked.java
new file mode 100644
index 0000000..db98c38
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/CheckLinked.java
@@ -0,0 +1,79 @@
+package com.alttd.proxydiscordlink.commands.subcommands;
+
+import com.alttd.proxydiscordlink.DiscordLink;
+import com.alttd.proxydiscordlink.commands.SubCommand;
+import com.alttd.proxydiscordlink.config.Config;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.proxy.Player;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.Template;
+
+import java.util.List;
+import java.util.Optional;
+import java.util.UUID;
+
+public class CheckLinked implements SubCommand {
+
+    private final String name;
+    private final String permission;
+    private final MiniMessage miniMessage;
+
+    public CheckLinked() {
+        name = "checklinked";
+        permission = "discordlink.checklinked";
+        miniMessage = MiniMessage.get();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getPermission() {
+        return permission;
+    }
+
+    @Override
+    public void execute(String[] args, CommandSource source) {
+        if (!source.hasPermission(getPermission())) {
+            source.sendMessage(miniMessage.parse(Config.NO_PERMISSION));
+            return;
+        }
+        if (args.length != 2 || !args[1].matches("\\w{3,16}")) {
+            source.sendMessage(miniMessage.parse(getHelpMessage()));
+            return;
+        }
+
+        Optional<Player> optionalPlayer = DiscordLink.getPlugin().getProxy().getPlayer(args[1]);
+        if (optionalPlayer.isEmpty())
+        {
+            optionalPlayer = DiscordLink.getPlugin().getProxy()
+                    .getPlayer(UUID.fromString(DiscordLink.getPlugin().getDatabase().uuidFromName(args[1])));
+            if (optionalPlayer.isEmpty())
+            {
+                source.sendMessage(miniMessage.parse(Config.INVALID_PLAYER));
+                return;
+            }
+        }
+
+        isLinked(source, optionalPlayer.get());
+    }
+
+    private void isLinked(CommandSource source, Player player) {
+        List<Template> templates = List.of(
+                Template.of("linked_status", DiscordLink.getPlugin().getDatabase()
+                        .playerIsLinked(player) ? "linked" : "not linked"),
+                Template.of("player", player.getUsername()));
+
+        source.sendMessage(miniMessage.parse(Config.IS_LINKED, templates));
+    }
+
+    @Override
+    public List<String> suggest(String[] args) {
+        return null;
+    }
+
+    @Override
+    public String getHelpMessage() {
+        return Config.HELP_CHECK_LINKED;
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Link.java b/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Link.java
new file mode 100644
index 0000000..641a84d
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Link.java
@@ -0,0 +1,77 @@
+package com.alttd.proxydiscordlink.commands.subcommands;
+
+import com.alttd.proxydiscordlink.DiscordLink;
+import com.alttd.proxydiscordlink.commands.SubCommand;
+import com.alttd.proxydiscordlink.config.Config;
+import com.alttd.proxydiscordlink.database.Database;
+import com.alttd.proxydiscordlink.util.Utilities;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.proxy.Player;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.Template;
+
+import java.util.List;
+
+public class Link implements SubCommand {
+
+    private final String name;
+    private final String permission;
+    private final MiniMessage miniMessage;
+
+    public Link() {
+        name = "link";
+        permission = "discordlink.link";
+        miniMessage = MiniMessage.get();
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public String getPermission() {
+        return permission;
+    }
+
+    @Override
+    public void execute(String[] args, CommandSource source) {
+        if (!(source instanceof Player player)) {
+            source.sendMessage(miniMessage.parse(Config.CONSOLE));
+            return;
+        }
+        if (!player.hasPermission(getPermission())) {
+            source.sendMessage(miniMessage.parse(Config.NO_PERMISSION));
+            return;
+        }
+
+        linkAccounts(player);
+    }
+
+    private void linkAccounts(Player player) {
+        Database database = DiscordLink.getPlugin().getDatabase();
+
+        if (database.playerIsLinked(player)) {
+            player.sendMessage(miniMessage.parse(Config.ALREADY_LINKED_ACCOUNTS));
+            return;
+        }
+        if (database.isInCache(player)) {
+            player.sendMessage(miniMessage.parse(Config.ALREADY_GOT_CODE));
+        }
+
+        String authCode = Utilities.getAuthKey();
+
+        player.sendMessage(miniMessage.parse(Config.GIVE_CODE, Template.of("code", authCode)));
+        DiscordLink.getPlugin().getCache()
+                .cacheCode(player.getUniqueId(), authCode);
+        database.storeDataInCache(player, authCode, Utilities.getRankName(player), Utilities.isDonor(player));
+    }
+
+    @Override
+    public List<String> suggest(String[] args) {
+        return null;
+    }
+
+    @Override
+    public String getHelpMessage() {
+        return Config.HELP_LINK;
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Unlink.java b/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Unlink.java
new file mode 100644
index 0000000..ef6829a
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/commands/subcommands/Unlink.java
@@ -0,0 +1,70 @@
+package com.alttd.proxydiscordlink.commands.subcommands;
+
+import com.alttd.proxydiscordlink.DiscordLink;
+import com.alttd.proxydiscordlink.commands.SubCommand;
+import com.alttd.proxydiscordlink.config.Config;
+import com.alttd.proxydiscordlink.database.Database;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.proxy.Player;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+
+import java.util.List;
+
+public class Unlink implements SubCommand {
+
+    private final String name;
+    private final String permission;
+    private final MiniMessage miniMessage;
+
+    public Unlink() {
+        name = "unlink";
+        permission = "discordlink.unlink";
+        miniMessage = MiniMessage.get();
+    }
+
+    @Override
+    public String getName() {
+        return name;
+    }
+
+    @Override
+    public String getPermission() {
+        return permission;
+    }
+
+    @Override
+    public void execute(String[] args, CommandSource source) {
+        if (!(source instanceof Player player)) {
+            source.sendMessage(miniMessage.parse(Config.CONSOLE));
+            return;
+        }
+        if (!player.hasPermission(getPermission())) {
+            source.sendMessage(miniMessage.parse(Config.NO_PERMISSION));
+            return;
+        }
+
+        unlinkAccounts(player);
+    }
+
+    private void unlinkAccounts(Player player) {
+        Database database = DiscordLink.getPlugin().getDatabase();
+
+        if (!database.playerIsLinked(player)) {
+            player.sendMessage(miniMessage.parse(Config.ACCOUNTS_NOT_LINKED));
+            return;
+        }
+
+        database.removeLinkedAccount(player);
+        player.sendMessage(miniMessage.parse(Config.UNLINKED_ACCOUNTS));
+    }
+
+    @Override
+    public List<String> suggest(String[] args) {
+        return null;
+    }
+
+    @Override
+    public String getHelpMessage() {
+        return Config.HELP_UNLINK;
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/config/Config.java b/src/main/java/com/alttd/proxydiscordlink/config/Config.java
new file mode 100644
index 0000000..e66b08c
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/config/Config.java
@@ -0,0 +1,220 @@
+package com.alttd.proxydiscordlink.config;
+
+import com.google.common.base.Throwables;
+import com.google.common.reflect.TypeToken;
+import ninja.leaping.configurate.ConfigurationNode;
+import ninja.leaping.configurate.ConfigurationOptions;
+import ninja.leaping.configurate.objectmapping.ObjectMappingException;
+import ninja.leaping.configurate.yaml.YAMLConfigurationLoader;
+import org.yaml.snakeyaml.DumperOptions;
+
+import java.io.File;
+import java.io.IOException;
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.lang.reflect.Modifier;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.regex.Pattern;
+
+public final class Config {
+    private static final Pattern PATH_PATTERN = Pattern.compile("\\.");
+    private static final String HEADER = "";
+
+    private static File CONFIG_FILE;
+    public static ConfigurationNode config;
+    public static YAMLConfigurationLoader configLoader;
+
+    static int version;
+    static boolean verbose;
+
+    public static File CONFIGPATH;
+
+    public static void init() { // todo setup share for the config
+        CONFIGPATH = new File(System.getProperty("user.home") + File.separator + "share" + File.separator + "configs" + File.separator + "DiscordLink");
+        CONFIG_FILE = new File(CONFIGPATH, "config.yml");
+
+        configLoader = YAMLConfigurationLoader.builder()
+                .setFile(CONFIG_FILE)
+                .setFlowStyle(DumperOptions.FlowStyle.BLOCK)
+                .build();
+        if (!CONFIG_FILE.getParentFile().exists()) {
+            if (!CONFIG_FILE.getParentFile().mkdirs()) {
+                return;
+            }
+        }
+        if (!CONFIG_FILE.exists()) {
+            try {
+                if (!CONFIG_FILE.createNewFile()) {
+                    return;
+                }
+            } catch (IOException error) {
+                error.printStackTrace();
+            }
+        }
+
+        try {
+            config = configLoader.load(ConfigurationOptions.defaults().setHeader(HEADER));
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+
+        verbose = getBoolean("verbose", true);
+        version = getInt("config-version", 1);
+
+        readConfig(Config.class, null);
+        try {
+            configLoader.save(config);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+
+    public static void readConfig(Class<?> clazz, Object instance) {
+        for (Method method : clazz.getDeclaredMethods()) {
+            if (Modifier.isPrivate(method.getModifiers())) {
+                if (method.getParameterTypes().length == 0 && method.getReturnType() == Void.TYPE) {
+                    try {
+                        method.setAccessible(true);
+                        method.invoke(instance);
+                    } catch (InvocationTargetException | IllegalAccessException ex) {
+                        throw Throwables.propagate(ex.getCause());
+                    }
+                }
+            }
+        }
+        try {
+            configLoader.save(config);
+        } catch (IOException ex) {
+            throw Throwables.propagate(ex.getCause());
+        }
+    }
+
+    public static void saveConfig() {
+        try {
+            configLoader.save(config);
+        } catch (IOException ex) {
+            throw Throwables.propagate(ex.getCause());
+        }
+    }
+
+    private static Object[] splitPath(String key) {
+        return PATH_PATTERN.split(key);
+    }
+
+    private static void set(String path, Object def) {
+        if (config.getNode(splitPath(path)).isVirtual())
+            config.getNode(splitPath(path)).setValue(def);
+    }
+
+    private static void setString(String path, String def) {
+        try {
+            if (config.getNode(splitPath(path)).isVirtual())
+                config.getNode(splitPath(path)).setValue(TypeToken.of(String.class), def);
+        } catch (ObjectMappingException ex) {
+        }
+    }
+
+    private static boolean getBoolean(String path, boolean def) {
+        set(path, def);
+        return config.getNode(splitPath(path)).getBoolean(def);
+    }
+
+    private static double getDouble(String path, double def) {
+        set(path, def);
+        return config.getNode(splitPath(path)).getDouble(def);
+    }
+
+    private static int getInt(String path, int def) {
+        set(path, def);
+        return config.getNode(splitPath(path)).getInt(def);
+    }
+
+    private static String getString(String path, String def) {
+        setString(path, def);
+        return config.getNode(splitPath(path)).getString(def);
+    }
+
+    private static Long getLong(String path, Long def) {
+        set(path, def);
+        return config.getNode(splitPath(path)).getLong(def);
+    }
+
+    private static <T> List<String> getList(String path, T def) {
+        try {
+            set(path, def);
+            return config.getNode(splitPath(path)).getList(TypeToken.of(String.class));
+        } catch (ObjectMappingException ex) {
+        }
+        return new ArrayList<>();
+    }
+
+    private static ConfigurationNode getNode(String path) {
+        if (config.getNode(splitPath(path)).isVirtual()) {
+            //new RegexConfig("Dummy");
+        }
+        config.getChildrenMap();
+        return config.getNode(splitPath(path));
+    }
+
+
+    /**
+     * ONLY EDIT ANYTHING BELOW THIS LINE
+     **/
+    public static String DRIVERS = "mysql";
+    public static String IP = "localhost";
+    public static String PORT = "3306";
+    public static String DATABASE_NAME = "discordlink";
+    public static String USERNAME = "root";
+    public static String PASSWORD = "root";
+
+    private static void database() {
+        DRIVERS = getString("database.drivers", DRIVERS);
+        IP = getString("database.ip", IP);
+        PORT = getString("database.port", PORT);
+        DATABASE_NAME = getString("database.database_name", DATABASE_NAME);
+        USERNAME = getString("database.username", USERNAME);
+        PASSWORD = getString("database.password", PASSWORD);
+    }
+
+    public static List<String> DONOR_GROUPS = new ArrayList<>(List.of("donor"));
+    public static List<String> DISCORD_GROUPS = new ArrayList<>(List.of("nitro"));
+
+    private static void loadGroups() {
+        DONOR_GROUPS = getList("settings.donor-groups", DONOR_GROUPS);
+        DISCORD_GROUPS = getList("settings.discord-groups", DISCORD_GROUPS);
+    }
+
+    public static List<String> DISCORD_MESSAGE = new ArrayList<>(List.of("Invite code here."));
+    public static String DISCORD_LINK = "<click:run:command:discord link:><yellow>Your Minecraft and Discord accounts aren't linked yet, to link them click this message!</yellow></click>";
+    public static String GIVE_CODE = "<yellow>Your code is <gold><code></gold>, To link your accounts do <gold>&link <code></gold> in the Discord #link channel.</yellow>";
+    public static String ALREADY_LINKED_ACCOUNTS = "<yellow>Your accounts are already linked. You can unlink your accounts by doing <gold>/discord unlink</gold>.</yellow>";
+    public static String ALREADY_GOT_CODE = "<yellow>You have already got your code. Your code is <gold><code><gold></yellow>";
+    public static String ACCOUNTS_NOT_LINKED = "<yellow>Your Minecraft and Discord accounts aren't linked</yellow>";
+    public static String UNLINKED_ACCOUNTS = "<yellow>You have successfully unlinked your accounts.</yellow>";
+    public static String IS_LINKED = "<yellow><player> is <linked_status>.</yellow>";
+    public static String INVALID_PLAYER = "<red><player> is not online or is not a valid player.</red>";
+    public static String NO_PERMISSION = "<red>You do not have permission to do that.</red>";
+    public static String CONSOLE = "<red>This command can not be executed from console.</red>";
+    public static String HELP_MESSAGE = "<yellow>DiscordLink commands:\n<commands></yellow>";
+    public static String HELP_LINK = "<yellow><gold>/discord link</gold>: Get a code which can be used to link your Minecraft and Discord accounts.</yellow>";
+    public static String HELP_UNLINK = "<yellow><gold>/discord unlink</gold>: Unlink your Minecraft and Discord accounts.</yellow>";
+    public static String HELP_CHECK_LINKED = "<yellow><gold>/discord checklinked <user></gold>: Check if the specified user has their Minecraft and Discord accounts linked.</yellow>";
+
+    private static void loadMessages() {
+        DISCORD_MESSAGE = getList("messages.discord-message", DISCORD_MESSAGE);
+        GIVE_CODE = getString("messages.give-code", GIVE_CODE);
+        ALREADY_LINKED_ACCOUNTS = getString("messages.already-linked-accounts", ALREADY_LINKED_ACCOUNTS);
+        ALREADY_GOT_CODE = getString("messages.already-got-code", ALREADY_GOT_CODE);
+        ACCOUNTS_NOT_LINKED = getString("messages.accounts-not-linked", ACCOUNTS_NOT_LINKED);
+        UNLINKED_ACCOUNTS = getString("messages.unlinked-accounts", UNLINKED_ACCOUNTS);
+        IS_LINKED = getString("messages.is-linked", IS_LINKED);
+        INVALID_PLAYER = getString("messages.invalid-player", INVALID_PLAYER);
+        NO_PERMISSION = getString("messages.no-permission", NO_PERMISSION);
+        CONSOLE = getString("messages.console", CONSOLE);
+        HELP_MESSAGE = getString("message.help-message", HELP_MESSAGE);
+        HELP_LINK = getString("message.help-link", HELP_LINK);
+        HELP_UNLINK = getString("message.help-unlink", HELP_UNLINK);
+        HELP_CHECK_LINKED = getString("message.help-check-linked", HELP_CHECK_LINKED);
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/database/Database.java b/src/main/java/com/alttd/proxydiscordlink/database/Database.java
new file mode 100644
index 0000000..af45dbf
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/database/Database.java
@@ -0,0 +1,295 @@
+package com.alttd.proxydiscordlink.database;
+
+import com.alttd.proxydiscordlink.util.ALogger;
+import com.alttd.proxydiscordlink.util.Utilities;
+import com.velocitypowered.api.proxy.Player;
+
+import java.sql.PreparedStatement;
+import java.sql.ResultSet;
+import java.sql.SQLException;
+import java.sql.Statement;
+import java.util.Objects;
+import java.util.UUID;
+
+public class Database {
+
+    public void createTables() {
+        String linked_accounts = "CREATE TABLE IF NOT EXISTS linked_accounts (" +
+                "player_uuid VARCHAR(36) NOT NULL, " +
+                "player_name VARCHAR(16) NOT NULL, " +
+                "player_nickname VARCHAR(16), " +
+                "player_rank VARCHAR(256), " +
+                "player_isdonor BIT NOT NULL, " +
+                "player_isnitro BIT NOT NULL, " +
+                "discord_username VARCHAR(256) NOT NULL, " +
+                "discord_id VARCHAR(256) NOT NULL, " +
+                "PRIMARY KEY(player_uuid)" +
+                ");";
+        String cache = "CREATE TABLE IF NOT EXISTS cache (" +
+                "player_uuid VARCHAR(36) NOT NULL, " +
+                "player_name VARCHAR(16) NOT NULL, " +
+                "player_nickname VARCHAR(16), " +
+                "player_rank VARCHAR(256), " +
+                "player_isdonor BIT NOT NULL, " +
+                "code VARCHAR(6) NOT NULL, " +
+                "PRIMARY KEY(player_uuid)" +
+                ");";
+        String updates = "CREATE TABLE IF NOT EXISTS `updates` (" +
+                "`player_uuid` varchar(36) NOT NULL, " +
+                "`player_name` varchar(16) NOT NULL, " +
+                "`player_nickname` varchar(16) DEFAULT NULL, " +
+                "`player_rank` varchar(256) DEFAULT NULL, " +
+                "`player_isdonor` bit(1) DEFAULT b'0', " +
+                "`player_isnitro` bit(1) DEFAULT b'0', " +
+                "`discord_username` varchar(256) DEFAULT NULL, " +
+                "`discord_id` varchar(256) DEFAULT NULL, " +
+                "`discord_update` bit(2) NOT NULL DEFAULT b'0', " +
+                "`minecraft_update` bit(2) NOT NULL DEFAULT b'0', " +
+                "PRIMARY KEY (`player_uuid`)" +
+                ")";
+        try {
+            Statement statement = DatabaseConnection.getConnection().createStatement();
+            statement.execute(linked_accounts);
+            statement.execute(cache);
+            statement.execute(updates);
+        } catch (SQLException var3) {
+            var3.printStackTrace();
+        }
+    }
+
+    public void storeDataInCache(Player player, String code, String rank, boolean isDonor) {
+        String sql = "INSERT INTO cache (player_uuid, player_name, player_nickname, player_rank, player_isdonor, code) VALUES (?, ?, ?, ?, ?, ?)";
+
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection().prepareStatement(sql);
+
+            statement.setString(1, player.getUniqueId().toString());
+            statement.setString(2, player.getUsername());
+            statement.setString(3, getNick(player.getUniqueId()));
+            statement.setString(4, rank);
+            statement.setBoolean(5, isDonor);
+            statement.setString(6, code);
+            statement.execute();
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+
+    }
+
+    public void syncPlayerData(Player player) {
+
+        ResultSet resultSet = getPlayerData(player.getUniqueId());
+        try {
+            if (!resultSet.next()) return;
+
+            String discordNickname = resultSet.getString("player_nickname");
+            String playerNickname = getNick(player.getUniqueId());
+
+            boolean correctName = resultSet.getString("player_name").equals(player.getUsername());
+            boolean correctNick = Objects.equals(discordNickname, playerNickname);
+            boolean correctRankName = resultSet.getString("player_rank").equals(Utilities.getRankName(player));
+            boolean correctRank = resultSet.getBoolean("player_isdonor") == (Utilities.isDonor(player));
+
+            if (correctName && correctNick && correctRankName && correctRank) {
+                return;
+            }
+
+            syncPlayer(resultSet, player, playerNickname);
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    public ResultSet getPlayerData(UUID uuid) {
+        try {
+            return getStringResult("SELECT * FROM linked_accounts WHERE player_uuid = ?", uuid.toString());
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+        return null;
+    }
+
+    private void syncPlayer(ResultSet resultSet, Player player, String playerNickname) {
+        try {
+            String sql = "INSERT INTO updates " +
+                    "VALUES (?, ?, ?, ?, ?, ?, ?, ?, 0, 1) " +
+                    "ON DUPLICATE KEY UPDATE player_uuid = ?";
+
+            PreparedStatement statement = DatabaseConnection.getConnection().prepareStatement(sql);
+
+            int donor = Utilities.isDonor(player) ? 1 : 0;
+            String uuid = player.getUniqueId().toString();
+
+            statement.setString(1, player.getUniqueId().toString());
+            statement.setString(2, player.getUsername());
+            statement.setString(3, playerNickname);
+            statement.setString(4, Utilities.getRankName(player));
+            statement.setInt(5, donor);
+            statement.setInt(6, resultSet.getInt("player_isnitro"));
+            statement.setString(7, resultSet.getString("discord_username"));
+            statement.setString(8, resultSet.getString("discord_id"));
+            statement.setString(9, uuid);
+
+            statement.execute();
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    public boolean isInCache(Player player) { //TODO maybe this can be a map instead
+        try {
+            ResultSet resultSet = getStringResult("SELECT * FROM cache WHERE player_uuid = ?", player.getUniqueId().toString());
+            if (resultSet.next()) {
+                return true;
+            }
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+
+        return false;
+    }
+
+    public boolean playerIsLinked(Player player) { //TODO maybe this can be using the discord api instead? (or a cache idk)
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection()
+                    .prepareStatement("SELECT * FROM linked_accounts WHERE player_uuid = '" + player.getUniqueId().toString() + "'");
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+                return true;
+            }
+
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+
+        return false;
+    }
+
+    public void removeLinkedAccount(Player player) {
+        String discordId = "0";
+
+        try {
+            PreparedStatement statementSelect = DatabaseConnection.getConnection()
+                    .prepareStatement("SELECT * FROM linked_accounts WHERE player_uuid = '" + player.getUniqueId().toString() + "'");
+            ResultSet resultSet = statementSelect.executeQuery();
+
+            if (!resultSet.next()) {
+                ALogger.error("Unable to remove linked account for: " + player.getUsername() + " : " + player.getUniqueId());
+                return;
+            }
+
+            PreparedStatement statementInsert = DatabaseConnection.getConnection()
+                    .prepareStatement("INSERT INTO `updates` (`player_uuid`, `player_name`, `player_nickname`, `player_rank`, " +
+                            "`player_isdonor`, `player_isnitro`, `discord_username`, `discord_id`, " +
+                            "`discord_update`, `minecraft_update`) " +
+                            "VALUES (?, ?, ?, ?, ?, ?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE player_uuid = ?");
+
+            discordId = resultSet.getString("discord_id");
+
+            statementInsert.setString(1, resultSet.getString("player_uuid"));
+            statementInsert.setString(2, resultSet.getString("player_name"));
+            statementInsert.setString(3, resultSet.getString("player_nickname"));
+            statementInsert.setString(4, resultSet.getString("player_rank"));
+            statementInsert.setInt(5, resultSet.getInt("player_isdonor"));
+            statementInsert.setInt(6, resultSet.getInt("player_isnitro"));
+            statementInsert.setString(7, resultSet.getString("discord_username"));
+            statementInsert.setString(8, discordId);
+            statementInsert.setInt(9, 0);
+            statementInsert.setInt(10, 2);
+            statementInsert.setString(11, resultSet.getString("player_uuid"));
+
+            statementInsert.execute();
+            statementInsert.close();
+
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection()
+                    .prepareStatement("DELETE FROM linked_accounts WHERE player_uuid = ?");
+            statement.setString(1, player.getUniqueId().toString());
+            statement.execute();
+
+            statement = DatabaseConnection.getConnection()
+                    .prepareStatement("DELETE FROM name_type WHERE discord_id = ?");
+            statement.setString(1, discordId);
+            statement.execute();
+
+            statement.close();
+        } catch (SQLException var2) {
+            var2.printStackTrace();
+        }
+
+    }
+
+    public void removePlayerFromCache(Player player) {
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection()
+                    .prepareStatement("DELETE FROM cache WHERE player_uuid = '" + player.getUniqueId().toString() + "'");
+
+            statement.executeUpdate();
+            statement.close();
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+    }
+
+    public boolean hasDiscordNitro(Player player) {
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection()
+                    .prepareStatement("SELECT * FROM linked_accounts WHERE player_uuid = '" + player.getUniqueId().toString() + "'");
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+                return resultSet.getInt("player_isnitro") == 1;
+            }
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+
+        return false;
+    }
+
+    public String uuidFromName(String playerName) {
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection()
+                    .prepareStatement("SELECT * FROM linked_accounts WHERE player_name = '" + playerName + "'");
+            ResultSet resultSet = statement.executeQuery();
+
+            if (resultSet.next()) {
+                return resultSet.getString("player_name");
+            }
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+
+        return null;
+    }
+
+    public String getNick(UUID uuid) {
+        try {
+            PreparedStatement statement = DatabaseConnection.getConnection()
+                    .prepareStatement("SELECT * FROM nicknames WHERE uuid = ?");
+            statement.setString(1, uuid.toString());
+            ResultSet resultSet = statement.executeQuery();
+            if (resultSet.next()) {
+                return resultSet.getString("player_name");
+            }
+        } catch (SQLException exception) {
+            exception.printStackTrace();
+        }
+        return null;
+    }
+
+    private ResultSet getStringResult(String query, String... parameters) throws SQLException {
+        PreparedStatement statement = DatabaseConnection.getConnection().prepareStatement(query);
+
+        for (int i = 1; i < parameters.length + 1; ++i) {
+            statement.setString(i, parameters[i - 1]);
+        }
+
+        return statement.executeQuery();
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/database/DatabaseConnection.java b/src/main/java/com/alttd/proxydiscordlink/database/DatabaseConnection.java
new file mode 100644
index 0000000..f8c0fed
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/database/DatabaseConnection.java
@@ -0,0 +1,49 @@
+package com.alttd.proxydiscordlink.database;
+
+import com.alttd.proxydiscordlink.config.Config;
+import com.alttd.proxydiscordlink.DiscordLink;
+
+import java.sql.Connection;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+
+public class DatabaseConnection {
+
+    private static DatabaseConnection instance;
+    private Connection connection;
+
+    public DatabaseConnection() throws SQLException {
+        instance = this;
+        instance.openConnection();
+        DiscordLink.getPlugin().getDatabase().createTables();
+    }
+
+    public void openConnection() throws SQLException {
+        if (this.connection == null || this.connection.isClosed()) {
+            synchronized(this) {
+                if (this.connection == null || this.connection.isClosed()) {
+                    this.connection = DriverManager.getConnection("jdbc:"
+                            + Config.DRIVERS + "://"
+                            + Config.IP + ":"
+                            + Config.PORT + "/"
+                            + Config.DATABASE_NAME
+                            + "?autoReconnect=true&useSSL=false", Config.USERNAME, Config.PASSWORD);
+                }
+            }
+        }
+    }
+
+    public static Connection getConnection() {
+        try {
+            instance.openConnection();
+        } catch (SQLException var1) {
+            var1.printStackTrace();
+        }
+
+        return instance.connection;
+    }
+
+    public static void initialize() throws SQLException {
+        instance = new DatabaseConnection();
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/events/playerJoin.java b/src/main/java/com/alttd/proxydiscordlink/events/playerJoin.java
new file mode 100644
index 0000000..3112b3a
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/events/playerJoin.java
@@ -0,0 +1,52 @@
+package com.alttd.proxydiscordlink.events;
+
+import com.alttd.proxydiscordlink.database.Database;
+import com.alttd.proxydiscordlink.DiscordLink;
+import com.alttd.proxydiscordlink.util.ALogger;
+import com.alttd.proxydiscordlink.util.Utilities;
+import com.velocitypowered.api.event.PostOrder;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.player.ServerConnectedEvent;
+import com.velocitypowered.api.proxy.Player;
+import net.luckperms.api.LuckPerms;
+import net.luckperms.api.model.group.Group;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.node.Node;
+import net.luckperms.api.node.types.InheritanceNode;
+
+public class playerJoin {
+
+    @Subscribe(order = PostOrder.LATE)
+    public void onPlayerJoin(ServerConnectedEvent event) {
+        Player player = event.getPlayer();
+        Database database = DiscordLink.getPlugin().getDatabase();
+
+        if (database.playerIsLinked(player)) {
+            database.syncPlayerData(player);
+
+            boolean isNitro = database.hasDiscordNitro(player);
+            boolean hasNitro = Utilities.hasMinecraftNitro(player);
+
+            LuckPerms luckPermsAPI = Utilities.getLuckPerms();
+            Group discord = luckPermsAPI.getGroupManager().getGroup("discord");
+
+            if (discord == null) {
+                ALogger.error("Unable to find discord group in DiscordLink");
+                return;
+            }
+
+            if (isNitro && !hasNitro) {
+                luckPermsAPI.getUserManager().modifyUser(player.getUniqueId(), (User user) -> {
+                    Node node = InheritanceNode.builder(discord).build();
+                    user.data().add(node);
+                });
+
+            } else if (!isNitro && hasNitro) {
+                luckPermsAPI.getUserManager().modifyUser(player.getUniqueId(), (User user) -> {
+                    Node node = InheritanceNode.builder(discord).build();
+                    user.data().remove(node);
+                });
+            }
+        }
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/events/playerLeave.java b/src/main/java/com/alttd/proxydiscordlink/events/playerLeave.java
new file mode 100644
index 0000000..1ef73be
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/events/playerLeave.java
@@ -0,0 +1,23 @@
+package com.alttd.proxydiscordlink.events;
+
+import com.alttd.proxydiscordlink.database.Database;
+import com.alttd.proxydiscordlink.DiscordLink;
+import com.velocitypowered.api.event.PostOrder;
+import com.velocitypowered.api.event.Subscribe;
+import com.velocitypowered.api.event.connection.DisconnectEvent;
+import com.velocitypowered.api.proxy.Player;
+
+public class playerLeave {
+
+    @Subscribe(order = PostOrder.LATE)
+    public void onPlayerLeave(DisconnectEvent event) {
+        Player player = event.getPlayer();
+
+        Database database = DiscordLink.getPlugin().getDatabase();
+        if (database.isInCache(player)) //TODO async?
+            database.removePlayerFromCache(player);
+
+        DiscordLink.getPlugin().getCache().removeCachedPlayer(player.getUniqueId());
+    }
+
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/util/ALogger.java b/src/main/java/com/alttd/proxydiscordlink/util/ALogger.java
new file mode 100644
index 0000000..2a1041e
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/util/ALogger.java
@@ -0,0 +1,29 @@
+package com.alttd.proxydiscordlink.util;
+
+import java.util.logging.Level;
+import java.util.logging.Logger;
+
+public class ALogger {
+
+    private static Logger logger;
+
+    public static void init(Logger log) {
+        logger = log;
+    }
+
+    private void log(String message) {
+        logger.info(message);
+    }
+
+    public static void warn(String message) {
+        logger.warning(message);
+    }
+
+    public static void info(String message) {
+        logger.info(message);
+    }
+
+    public static void error(String message) {
+        logger.log(Level.SEVERE, message);
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/util/Cache.java b/src/main/java/com/alttd/proxydiscordlink/util/Cache.java
new file mode 100644
index 0000000..afae059
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/util/Cache.java
@@ -0,0 +1,28 @@
+package com.alttd.proxydiscordlink.util;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.UUID;
+
+public class Cache {
+
+    private final Map<UUID, String> playerCacheCode;
+
+    public Cache() {
+        playerCacheCode = new HashMap<>();
+    }
+
+    public void cacheCode(UUID uuid, String code) {
+        playerCacheCode.put(uuid, code);
+    }
+
+    public String getCode(UUID uuid)
+    {
+        return playerCacheCode.get(uuid);
+    }
+
+    public void removeCachedPlayer(UUID uuid)
+    {
+        playerCacheCode.remove(uuid);
+    }
+}
diff --git a/src/main/java/com/alttd/proxydiscordlink/util/Utilities.java b/src/main/java/com/alttd/proxydiscordlink/util/Utilities.java
new file mode 100644
index 0000000..b7ea72b
--- /dev/null
+++ b/src/main/java/com/alttd/proxydiscordlink/util/Utilities.java
@@ -0,0 +1,89 @@
+package com.alttd.proxydiscordlink.util;
+
+import com.alttd.proxydiscordlink.config.Config;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.proxy.Player;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.Template;
+import net.luckperms.api.LuckPerms;
+import net.luckperms.api.LuckPermsProvider;
+import net.luckperms.api.model.user.User;
+import net.luckperms.api.node.NodeType;
+import net.luckperms.api.node.types.InheritanceNode;
+
+import java.util.Random;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+public class Utilities {
+
+    private static LuckPerms luckPerms;
+    private static MiniMessage miniMessage = MiniMessage.get();
+
+    public static LuckPerms getLuckPerms() {
+        if (luckPerms == null)
+            luckPerms = LuckPermsProvider.get();
+        return luckPerms;
+    }
+
+    public static boolean isDonor(Player player) {
+        User user = getLuckPerms().getUserManager().getUser(player.getUniqueId());
+        if (user == null) {
+            ALogger.error("Unable to find user in isDonor!");
+            return false;
+        }
+
+        Set<String> groups = user
+                .getNodes().stream()
+                .filter(NodeType.INHERITANCE::matches)
+                .map(NodeType.INHERITANCE::cast)
+                .map(InheritanceNode::getGroupName)
+                .collect(Collectors.toSet());
+
+        for (String group : Config.DONOR_GROUPS) {
+            if (groups.contains(group)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static boolean hasMinecraftNitro(Player player) {
+        User user = getLuckPerms().getUserManager().getUser(player.getUniqueId());
+        if (user == null) {
+            ALogger.error("Unable to find user in isNitro!");
+            return false;
+        }
+
+        Set<String> groups = user
+                .getNodes().stream()
+                .filter(NodeType.INHERITANCE::matches)
+                .map(NodeType.INHERITANCE::cast)
+                .map(InheritanceNode::getGroupName)
+                .collect(Collectors.toSet());
+
+        for (String group : Config.DISCORD_GROUPS) {
+            if (groups.contains(group)) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    public static String getAuthKey() {
+        String randChars = "1234567890";
+        StringBuilder salt = new StringBuilder();
+        Random rnd = new Random();
+
+        while (salt.length() < 6) {
+            int index = (int) (rnd.nextFloat() * (float) randChars.length());
+            salt.append(randChars.charAt(index));
+        }
+
+        return salt.toString();
+    }
+
+    public static String getRankName(Player player) {
+        return getLuckPerms().getUserManager().getUser(player.getUniqueId()).getPrimaryGroup();
+    }
+}