PlotSquared/Bukkit/src/main/java/com/plotsquared/bukkit/BukkitPlatform.java

/*
 *       _____  _       _    _____                                _
 *      |  __ \| |     | |  / ____|                              | |
 *      | |__) | | ___ | |_| (___   __ _ _   _  __ _ _ __ ___  __| |
 *      |  ___/| |/ _ \| __|\___ \ / _` | | | |/ _` | '__/ _ \/ _` |
 *      | |    | | (_) | |_ ____) | (_| | |_| | (_| | | |  __/ (_| |
 *      |_|    |_|\___/ \__|_____/ \__, |\__,_|\__,_|_|  \___|\__,_|
 *                                    | |
 *                                    |_|
 *            PlotSquared plot management system for Minecraft
 *                  Copyright (C) 2020 IntellectualSites
 *
 *     This program is free software: you can redistribute it and/or modify
 *     it under the terms of the GNU General Public License as published by
 *     the Free Software Foundation, either version 3 of the License, or
 *     (at your option) any later version.
 *
 *     This program is distributed in the hope that it will be useful,
 *     but WITHOUT ANY WARRANTY; without even the implied warranty of
 *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *     GNU General Public License for more details.
 *
 *     You should have received a copy of the GNU General Public License
 *     along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package com.plotsquared.bukkit;

import com.google.inject.Guice;
import com.google.inject.Inject;
import com.google.inject.Injector;
import com.google.inject.Key;
import com.google.inject.Stage;
import com.google.inject.TypeLiteral;
import com.plotsquared.bukkit.generator.BukkitPlotGenerator;
import com.plotsquared.bukkit.inject.BackupModule;
import com.plotsquared.bukkit.inject.BukkitModule;
import com.plotsquared.bukkit.inject.PermissionModule;
import com.plotsquared.bukkit.inject.WorldManagerModule;
import com.plotsquared.bukkit.listener.BlockEventListener;
import com.plotsquared.bukkit.listener.ChunkListener;
import com.plotsquared.bukkit.listener.EntityEventListener;
import com.plotsquared.bukkit.listener.EntitySpawnListener;
import com.plotsquared.bukkit.listener.PaperListener;
import com.plotsquared.bukkit.listener.PlayerEventListener;
import com.plotsquared.bukkit.listener.ProjectileEventListener;
import com.plotsquared.bukkit.listener.ServerListener;
import com.plotsquared.bukkit.listener.SingleWorldListener;
import com.plotsquared.bukkit.listener.WorldEvents;
import com.plotsquared.bukkit.placeholder.PlaceholderFormatter;
import com.plotsquared.bukkit.player.BukkitPlayer;
import com.plotsquared.bukkit.placeholder.PAPIPlaceholders;
import com.plotsquared.bukkit.player.BukkitPlayerManager;
import com.plotsquared.bukkit.util.task.BukkitTaskManager;
import com.plotsquared.bukkit.util.BukkitUtil;
import com.plotsquared.bukkit.util.BukkitWorld;
import com.plotsquared.bukkit.util.SetGenCB;
import com.plotsquared.bukkit.util.UpdateUtility;
import com.plotsquared.bukkit.util.task.PaperTimeConverter;
import com.plotsquared.bukkit.util.task.SpigotTimeConverter;
import com.plotsquared.bukkit.uuid.BungeePermsUUIDService;
import com.plotsquared.bukkit.uuid.EssentialsUUIDService;
import com.plotsquared.bukkit.uuid.LuckPermsUUIDService;
import com.plotsquared.bukkit.uuid.OfflinePlayerUUIDService;
import com.plotsquared.bukkit.uuid.PaperUUIDService;
import com.plotsquared.bukkit.uuid.SQLiteUUIDService;
import com.plotsquared.bukkit.uuid.SquirrelIdUUIDService;
import com.plotsquared.core.PlotPlatform;
import com.plotsquared.core.PlotSquared;
import com.plotsquared.core.backup.BackupManager;
import com.plotsquared.core.command.WE_Anywhere;
import com.plotsquared.core.components.ComponentPresetManager;
import com.plotsquared.core.configuration.caption.ChatFormatter;
import com.plotsquared.core.configuration.ConfigurationNode;
import com.plotsquared.core.configuration.ConfigurationSection;
import com.plotsquared.core.configuration.ConfigurationUtil;
import com.plotsquared.core.configuration.Settings;
import com.plotsquared.core.configuration.file.YamlConfiguration;
import com.plotsquared.core.database.DBFunc;
import com.plotsquared.core.generator.GeneratorWrapper;
import com.plotsquared.core.generator.IndependentPlotGenerator;
import com.plotsquared.core.generator.SingleWorldGenerator;
import com.plotsquared.core.inject.annotations.BackgroundPipeline;
import com.plotsquared.core.inject.annotations.DefaultGenerator;
import com.plotsquared.core.inject.annotations.ImpromptuPipeline;
import com.plotsquared.core.inject.annotations.WorldConfig;
import com.plotsquared.core.inject.annotations.WorldFile;
import com.plotsquared.core.inject.modules.PlotSquaredModule;
import com.plotsquared.core.listener.PlotListener;
import com.plotsquared.core.listener.WESubscriber;
import com.plotsquared.core.player.PlotPlayer;
import com.plotsquared.core.plot.Plot;
import com.plotsquared.core.plot.PlotArea;
import com.plotsquared.core.plot.PlotAreaTerrainType;
import com.plotsquared.core.plot.PlotAreaType;
import com.plotsquared.core.plot.PlotId;
import com.plotsquared.core.plot.comment.CommentManager;
import com.plotsquared.core.plot.flag.implementations.ServerPlotFlag;
import com.plotsquared.core.plot.world.PlotAreaManager;
import com.plotsquared.core.plot.world.SinglePlotArea;
import com.plotsquared.core.plot.world.SinglePlotAreaManager;
import com.plotsquared.core.setup.PlotAreaBuilder;
import com.plotsquared.core.setup.SettingsNodesWrapper;
import com.plotsquared.core.util.EconHandler;
import com.plotsquared.core.util.EventDispatcher;
import com.plotsquared.core.util.FileUtils;
import com.plotsquared.core.util.PlatformWorldManager;
import com.plotsquared.core.util.PlayerManager;
import com.plotsquared.core.util.PremiumVerification;
import com.plotsquared.core.util.ReflectionUtils;
import com.plotsquared.core.util.SetupUtils;
import com.plotsquared.core.util.WorldUtil;
import com.plotsquared.core.util.task.TaskManager;
import com.plotsquared.core.util.task.TaskTime;
import com.plotsquared.core.uuid.CacheUUIDService;
import com.plotsquared.core.uuid.UUIDPipeline;
import com.plotsquared.core.uuid.offline.OfflineModeUUIDService;
import com.sk89q.worldedit.WorldEdit;
import io.papermc.lib.PaperLib;
import net.kyori.adventure.audience.Audience;
import org.bstats.bukkit.Metrics;
import org.bukkit.Bukkit;
import org.bukkit.Chunk;
import org.bukkit.Location;
import org.bukkit.World;
import org.bukkit.command.PluginCommand;
import org.bukkit.entity.Entity;
import org.bukkit.entity.LivingEntity;
import org.bukkit.entity.Player;
import org.bukkit.event.Listener;
import org.bukkit.generator.ChunkGenerator;
import org.bukkit.metadata.FixedMetadataValue;
import org.bukkit.metadata.MetadataValue;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.java.JavaPlugin;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.annotation.Nonnull;
import javax.annotation.Nullable;
import java.io.File;
import java.lang.reflect.Method;
import java.util.AbstractMap;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Queue;
import java.util.Set;
import java.util.UUID;
import java.util.concurrent.ExecutionException;
import java.util.concurrent.Executors;
import java.util.concurrent.LinkedBlockingQueue;
import java.util.concurrent.TimeUnit;

import static com.plotsquared.core.util.PremiumVerification.getDownloadID;
import static com.plotsquared.core.util.PremiumVerification.getResourceID;
import static com.plotsquared.core.util.PremiumVerification.getUserID;
import static com.plotsquared.core.util.ReflectionUtils.getRefClass;

@SuppressWarnings("unused")
public final class BukkitPlatform extends JavaPlugin implements Listener, PlotPlatform<Player> {

    private static final Logger logger = LoggerFactory.getLogger("P2/" + BukkitPlatform.class.getSimpleName());
    private static final int BSTATS_ID = 1404;

    static {
        try {
            Settings.load(new File("plugins/PlotSquared/config/settings.yml"));
        } catch (Throwable ignored) {
        }
    }

    private int[] version;
    private String pluginName;
    private SingleWorldListener singleWorldListener;
    private Method methodUnloadChunk0;
    private boolean methodUnloadSetup = false;
    private boolean metricsStarted;
    private EconHandler econ;

    private Injector injector;

    @Inject private PlotAreaManager plotAreaManager;
    @Inject private EventDispatcher eventDispatcher;
    @Inject private PlotListener plotListener;
    @Inject @WorldConfig private YamlConfiguration worldConfiguration;
    @Inject @WorldFile private File worldfile;
    @Inject private BukkitPlayerManager playerManager;
    @Inject private BackupManager backupManager;
    @Inject @ImpromptuPipeline private UUIDPipeline impromptuPipeline;
    @Inject @BackgroundPipeline private UUIDPipeline backgroundPipeline;
    @Inject private PlatformWorldManager<World> worldManager;
    private Locale serverLocale;

    @Override public int[] getServerVersion() {
        if (this.version == null) {
            try {
                this.version = new int[3];
                String[] split = Bukkit.getBukkitVersion().split("-")[0].split("\\.");
                this.version[0] = Integer.parseInt(split[0]);
                this.version[1] = Integer.parseInt(split[1]);
                if (split.length == 3) {
                    this.version[2] = Integer.parseInt(split[2]);
                }
            } catch (NumberFormatException e) {
                e.printStackTrace();
                return new int[] {1, 13, 0};
            }
        }
        return this.version;
    }

    @Override public String getServerImplementation() {
        return Bukkit.getVersion();
    }

    @Override public void onEnable() {
        this.pluginName = getDescription().getName();

        final TaskTime.TimeConverter timeConverter;
        if (PaperLib.isPaper()) {
            timeConverter = new PaperTimeConverter();
        } else {
            timeConverter = new SpigotTimeConverter();
        }

        // Stuff that needs to be created before the PlotSquared instance
        PlotPlayer.registerConverter(Player.class, BukkitUtil::adapt);
        TaskManager.setPlatformImplementation(new BukkitTaskManager(this, timeConverter));

        final PlotSquared plotSquared = new PlotSquared(this, "Bukkit");

        if (PlotSquared.platform().getServerVersion()[1] < 13) {
            System.out.println("You can't use this version of PlotSquared on a server less than Minecraft 1.13.2.");
            System.out.println("Please check the download page for the link to the legacy versions.");
            System.out.println("The server will now be shutdown to prevent any corruption.");
            Bukkit.shutdown();
            return;
        }

        // We create the injector after PlotSquared has been initialized, so that we have access
        // to generated instances and settings
        this.injector = Guice
            .createInjector(Stage.PRODUCTION, new PermissionModule(), new WorldManagerModule(), new PlotSquaredModule(), new BukkitModule(this),
                new BackupModule());
        this.injector.injectMembers(this);

        this.serverLocale = Locale.forLanguageTag(Settings.Enabled_Components.DEFAULT_LOCALE);

        if (PremiumVerification.isPremium() && Settings.Enabled_Components.UPDATE_NOTIFICATIONS) {
            injector.getInstance(UpdateUtility.class).updateChecker();
        }

        if (PremiumVerification.isPremium()) {
            logger.info("[P2] PlotSquared version licensed to Spigot user {}", getUserID());
            logger.info("[P2] https://www.spigotmc.org/resources/{}", getResourceID());
            logger.info("[P2] Download ID: {}", getDownloadID());
            logger.info("[P2] Thanks for supporting us :)");
        } else {
            logger.info("[P2] Couldn't verify purchase :(");
        }

        // Database
        if (Settings.Enabled_Components.DATABASE) {
            plotSquared.setupDatabase();
        }

        // Check if we need to convert old flag values, etc
        if (!plotSquared.getConfigurationVersion().equalsIgnoreCase("v5")) {
            // Perform upgrade
            if (DBFunc.dbManager.convertFlags()) {
                logger.info("[P2] Flags were converted successfully!");
                // Update the config version
                try {
                    plotSquared.setConfigurationVersion("v5");
                } catch (final Exception e) {
                    e.printStackTrace();
                }
            }
        }

        // Comments
        CommentManager.registerDefaultInboxes();

        plotSquared.startExpiryTasks();

        // Do stuff that was previously done in PlotSquared
        // Kill entities
        if (Settings.Enabled_Components.KILL_ROAD_MOBS || Settings.Enabled_Components.KILL_ROAD_VEHICLES) {
            this.runEntityTask();
        }

        // WorldEdit
        if (Settings.Enabled_Components.WORLDEDIT_RESTRICTIONS) {
            try {
                logger.info("[P2] {} hooked into WorldEdit", this.getPluginName());
                WorldEdit.getInstance().getEventBus().register(this.getInjector().getInstance(WESubscriber.class));
                if (Settings.Enabled_Components.COMMANDS) {
                    new WE_Anywhere();
                }
            } catch (Throwable e) {
                logger.error("[P2] Incompatible version of WorldEdit, please upgrade: https://builds.enginehub.org/job/worldedit?branch=master");
            }
        }

        if (Settings.Enabled_Components.EVENTS) {
            getServer().getPluginManager().registerEvents(getInjector().getInstance(PlayerEventListener.class), this);
            getServer().getPluginManager().registerEvents(getInjector().getInstance(BlockEventListener.class), this);
            getServer().getPluginManager().registerEvents(getInjector().getInstance(EntityEventListener.class), this);
            getServer().getPluginManager().registerEvents(getInjector().getInstance(ProjectileEventListener.class), this);
            getServer().getPluginManager().registerEvents(getInjector().getInstance(ServerListener.class), this);
            getServer().getPluginManager().registerEvents(getInjector().getInstance(EntitySpawnListener.class), this);
            if (PaperLib.isPaper() && Settings.Paper_Components.PAPER_LISTENERS) {
                getServer().getPluginManager().registerEvents(getInjector().getInstance(PaperListener.class), this);
            }
            this.plotListener.startRunnable();
        }

        // Required
        getServer().getPluginManager().registerEvents(getInjector().getInstance(WorldEvents.class), this);
        if (Settings.Enabled_Components.CHUNK_PROCESSOR) {
            getServer().getPluginManager().registerEvents(getInjector().getInstance(ChunkListener.class), this);
        }

        // Commands
        if (Settings.Enabled_Components.COMMANDS) {
            this.registerCommands();
        }

        // Economy
        if (Settings.Enabled_Components.ECONOMY) {
            TaskManager.runTask(() -> {
                this.getPermissionHandler().initialize();
                final EconHandler econHandler = getInjector().getInstance(EconHandler.class);
                if (econHandler != null) {
                    econHandler.init();
                }
            });
        }

        if (Settings.Enabled_Components.COMPONENT_PRESETS) {
            try {
                getInjector().getInstance(ComponentPresetManager.class);
            } catch (final Exception e) {
                logger.error("[P2] Failed to initialize the preset system", e);
            }
        }

        // World generators:
        final ConfigurationSection section = this.worldConfiguration.getConfigurationSection("worlds");
        final WorldUtil worldUtil = getInjector().getInstance(WorldUtil.class);

        if (section != null) {
            for (String world : section.getKeys(false)) {
                if (world.equals("CheckingPlotSquaredGenerator")) {
                    continue;
                }
                if (worldUtil.isWorld(world)) {
                    this.setGenerator(world);
                }
            }
            TaskManager.runTaskLater(() -> {
                for (String world : section.getKeys(false)) {
                    if (world.equals("CheckingPlotSquaredGenerator")) {
                        continue;
                    }
                    if (!worldUtil.isWorld(world) && !world.equals("*")) {
                        logger.warn("[P2] `{}` was not properly loaded - {} will now try to load it properly", world, this.getPluginName());
                        logger.warn(
                            "[P2]  - Are you trying to delete this world? Remember to remove it from the worlds.yml, bukkit.yml and multiverse worlds.yml");
                        logger.warn("[P2]  - Your world management plugin may be faulty (or non existent)");
                        logger.warn("[P2]  This message may also be a false positive and could be ignored.");
                        this.setGenerator(world);
                    }
                }
            }, TaskTime.ticks(1L));
        }

        // Services are accessed in order
        final CacheUUIDService cacheUUIDService = new CacheUUIDService(Settings.UUID.UUID_CACHE_SIZE);
        this.impromptuPipeline.registerService(cacheUUIDService);
        this.backgroundPipeline.registerService(cacheUUIDService);
        this.impromptuPipeline.registerConsumer(cacheUUIDService);
        this.backgroundPipeline.registerConsumer(cacheUUIDService);

        // Now, if the server is in offline mode we can only use profiles and direct UUID
        // access, and so we skip the player profile stuff as well as SquirrelID (Mojang lookups)
        if (Settings.UUID.OFFLINE) {
            final OfflineModeUUIDService offlineModeUUIDService = new OfflineModeUUIDService();
            this.impromptuPipeline.registerService(offlineModeUUIDService);
            this.backgroundPipeline.registerService(offlineModeUUIDService);
            logger.info("[P2] (UUID) Using the offline mode UUID service");
        }

        if (Settings.UUID.SERVICE_BUKKIT) {
            final OfflinePlayerUUIDService offlinePlayerUUIDService = new OfflinePlayerUUIDService();
            this.impromptuPipeline.registerService(offlinePlayerUUIDService);
            this.backgroundPipeline.registerService(offlinePlayerUUIDService);
        }

        final SQLiteUUIDService sqLiteUUIDService = new SQLiteUUIDService("user_cache.db");

        final SQLiteUUIDService legacyUUIDService;
        if (Settings.UUID.LEGACY_DATABASE_SUPPORT && FileUtils.getFile(PlotSquared.platform().getDirectory(), "usercache.db").exists()) {
            legacyUUIDService = new SQLiteUUIDService("usercache.db");
        } else {
            legacyUUIDService = null;
        }

        final LuckPermsUUIDService luckPermsUUIDService;
        if (Settings.UUID.SERVICE_LUCKPERMS && Bukkit.getPluginManager().getPlugin("LuckPerms") != null) {
            luckPermsUUIDService = new LuckPermsUUIDService();
            logger.info("[P2] (UUID) Using LuckPerms as a complementary UUID service");
        } else {
            luckPermsUUIDService = null;
        }

        final BungeePermsUUIDService bungeePermsUUIDService;
        if (Settings.UUID.SERVICE_BUNGEE_PERMS && Bukkit.getPluginManager().getPlugin("BungeePerms") != null) {
            bungeePermsUUIDService = new BungeePermsUUIDService();
            logger.info("[P2] (UUID) Using BungeePerms as a complementary UUID service");
        } else {
            bungeePermsUUIDService = null;
        }

        final EssentialsUUIDService essentialsUUIDService;
        if (Settings.UUID.SERVICE_ESSENTIALSX && Bukkit.getPluginManager().getPlugin("Essentials") != null) {
            essentialsUUIDService = new EssentialsUUIDService();
            logger.info("[P2] (UUID) Using EssentialsX as a complementary UUID service");
        } else {
            essentialsUUIDService = null;
        }

        if (!Settings.UUID.OFFLINE) {
            // If running Paper we'll also try to use their profiles
            if (Bukkit.getOnlineMode() && PaperLib.isPaper() && Settings.UUID.SERVICE_PAPER) {
                final PaperUUIDService paperUUIDService = new PaperUUIDService();
                this.impromptuPipeline.registerService(paperUUIDService);
                this.backgroundPipeline.registerService(paperUUIDService);
                logger.info("[P2] (UUID) Using Paper as a complementary UUID service");
            }

            this.impromptuPipeline.registerService(sqLiteUUIDService);
            this.backgroundPipeline.registerService(sqLiteUUIDService);
            this.impromptuPipeline.registerConsumer(sqLiteUUIDService);
            this.backgroundPipeline.registerConsumer(sqLiteUUIDService);

            if (legacyUUIDService != null) {
                this.impromptuPipeline.registerService(legacyUUIDService);
                this.backgroundPipeline.registerService(legacyUUIDService);
            }

            // Plugin providers
            if (luckPermsUUIDService != null) {
                this.impromptuPipeline.registerService(luckPermsUUIDService);
                this.backgroundPipeline.registerService(luckPermsUUIDService);
            }
            if (bungeePermsUUIDService != null) {
                this.impromptuPipeline.registerService(bungeePermsUUIDService);
                this.backgroundPipeline.registerService(bungeePermsUUIDService);
            }
            if (essentialsUUIDService != null) {
                this.impromptuPipeline.registerService(essentialsUUIDService);
                this.backgroundPipeline.registerService(essentialsUUIDService);
            }

            final SquirrelIdUUIDService impromptuMojangService = new SquirrelIdUUIDService(Settings.UUID.IMPROMPTU_LIMIT);
            this.impromptuPipeline.registerService(impromptuMojangService);
            final SquirrelIdUUIDService backgroundMojangService = new SquirrelIdUUIDService(Settings.UUID.BACKGROUND_LIMIT);
            this.backgroundPipeline.registerService(backgroundMojangService);
        } else {
            this.impromptuPipeline.registerService(sqLiteUUIDService);
            this.backgroundPipeline.registerService(sqLiteUUIDService);
            this.impromptuPipeline.registerConsumer(sqLiteUUIDService);
            this.backgroundPipeline.registerConsumer(sqLiteUUIDService);

            if (legacyUUIDService != null) {
                this.impromptuPipeline.registerService(legacyUUIDService);
                this.backgroundPipeline.registerService(legacyUUIDService);
            }
        }

        this.impromptuPipeline.storeImmediately("*", DBFunc.EVERYONE);

        if (Settings.UUID.BACKGROUND_CACHING_ENABLED) {
            this.startUuidCaching(sqLiteUUIDService, cacheUUIDService);
        }

        if (Bukkit.getPluginManager().getPlugin("PlaceholderAPI") != null) {
            injector.getInstance(PAPIPlaceholders.class).register();
            if (Settings.Enabled_Components.EXTERNAL_PLACEHOLDERS) {
                ChatFormatter.formatters.add(getInjector().getInstance(PlaceholderFormatter.class));
            }
            logger.info("[P2] PlotSquared hooked into PlaceholderAPI");
        } else {
            logger.info("[P2] PlaceholderAPI is not in use. Hook deactivated");
        }

        if (Settings.Enabled_Components.BSTATS) {
            this.startMetrics();
        }
        else {
            logger.info("[P2] bStats is disabled. Please enable it in /plugins/PlotSquared/config/settings.yml. It helps the developers to identify the features most used and organize future updates better. Cheers.");
        }

        if (Settings.Enabled_Components.WORLDS) {
            TaskManager.getPlatformImplementation().taskRepeat(this::unload, TaskTime.seconds(1L));
            try {
                singleWorldListener = getInjector().getInstance(SingleWorldListener.class);
            } catch (Exception e) {
                e.printStackTrace();
            }
        }

        // Clean up potential memory leak
        Bukkit.getScheduler().runTaskTimer(this, () -> {
            try {
                for (final PlotPlayer<? extends Player> player : this.getPlayerManager().getPlayers()) {
                    if (player.getPlatformPlayer() == null || !player.getPlatformPlayer().isOnline()) {
                        this.getPlayerManager().removePlayer(player);
                    }
                }
            } catch (final Exception e) {
                getLogger().warning("Failed to clean up players: " + e.getMessage());
            }
        }, 100L, 100L);
    }

    private void unload() {
        if (!this.methodUnloadSetup) {
            this.methodUnloadSetup = true;
            try {
                ReflectionUtils.RefClass classCraftWorld = getRefClass("{cb}.CraftWorld");
                this.methodUnloadChunk0 = classCraftWorld.getRealClass().getDeclaredMethod("unloadChunk0", int.class, int.class, boolean.class);
                this.methodUnloadChunk0.setAccessible(true);
            } catch (Throwable event) {
                event.printStackTrace();
            }
        }

        if (this.plotAreaManager instanceof SinglePlotAreaManager) {
            long start = System.currentTimeMillis();
            final SinglePlotArea area = ((SinglePlotAreaManager) this.plotAreaManager).getArea();

            outer:
            for (final World world : Bukkit.getWorlds()) {
                final String name = world.getName();
                final char char0 = name.charAt(0);
                if (!Character.isDigit(char0) && char0 != '-') {
                    continue;
                }

                if (!world.getPlayers().isEmpty()) {
                    continue;
                }

                PlotId id;
                try {
                    id = PlotId.fromString(name);
                } catch (IllegalArgumentException ignored) {
                    continue;
                }
                final Plot plot = area.getOwnedPlot(id);
                if (plot != null) {
                    if (!plot.getFlag(ServerPlotFlag.class) || PlotSquared.platform().getPlayerManager().getPlayerIfExists(plot.getOwner()) == null) {
                        if (world.getKeepSpawnInMemory()) {
                            world.setKeepSpawnInMemory(false);
                            return;
                        }
                        final Chunk[] chunks = world.getLoadedChunks();
                        if (chunks.length == 0) {
                            if (!Bukkit.unloadWorld(world, true)) {
                                logger.warn("[P2] Failed to unload {}", world.getName());
                            }
                            return;
                        } else {
                            int index = 0;
                            do {
                                final Chunk chunkI = chunks[index++];
                                boolean result;
                                if (methodUnloadChunk0 != null) {
                                    try {
                                        result = (boolean) methodUnloadChunk0.invoke(world, chunkI.getX(), chunkI.getZ(), true);
                                    } catch (Throwable e) {
                                        methodUnloadChunk0 = null;
                                        e.printStackTrace();
                                        continue outer;
                                    }
                                } else {
                                    result = world.unloadChunk(chunkI.getX(), chunkI.getZ(), true);
                                }
                                if (!result) {
                                    continue outer;
                                }
                                if (System.currentTimeMillis() - start > 5) {
                                    return;
                                }
                            } while (index < chunks.length);
                        }
                    }
                }
            }
        }
    }

    private void startUuidCaching(@Nonnull final SQLiteUUIDService sqLiteUUIDService, @Nonnull final CacheUUIDService cacheUUIDService) {
        // Load all uuids into a big chunky boi queue
        final Queue<UUID> uuidQueue = new LinkedBlockingQueue<>();
        PlotSquared.get().forEachPlotRaw(plot -> {
            final Set<UUID> uuids = new HashSet<>();
            uuids.add(plot.getOwnerAbs());
            uuids.addAll(plot.getMembers());
            uuids.addAll(plot.getTrusted());
            uuids.addAll(plot.getDenied());
            for (final UUID uuid : uuids) {
                if (!uuidQueue.contains(uuid)) {
                    uuidQueue.add(uuid);
                }
            }
        });

        logger.info("[P2] (UUID) {} UUIDs will be cached", uuidQueue.size());

        Executors.newSingleThreadScheduledExecutor().schedule(() -> {
            // Begin by reading all the SQLite cache at once
            cacheUUIDService.accept(sqLiteUUIDService.getAll());
            // Now fetch names for all known UUIDs
            final int totalSize = uuidQueue.size();
            int read = 0;
            logger.info("[P2] (UUID) PlotSquared will fetch UUIDs in groups of {}", Settings.UUID.BACKGROUND_LIMIT);
            final List<UUID> uuidList = new ArrayList<>(Settings.UUID.BACKGROUND_LIMIT);

            // Used to indicate that the second retrieval has been attempted
            boolean secondRun = false;

            while (!uuidQueue.isEmpty() || !uuidList.isEmpty()) {
                if (!uuidList.isEmpty() && secondRun) {
                    logger.warn("[P2] (UUID) Giving up on last batch. Fetching new batch instead");
                    uuidList.clear();
                }
                if (uuidList.isEmpty()) {
                    // Retrieve the secondRun variable to indicate that we're retrieving a
                    // fresh batch
                    secondRun = false;
                    // Populate the request list
                    for (int i = 0; i < Settings.UUID.BACKGROUND_LIMIT && !uuidQueue.isEmpty(); i++) {
                        uuidList.add(uuidQueue.poll());
                        read++;
                    }
                } else {
                    // If the list isn't empty then this is a second run for
                    // an old batch, so we re-use the patch
                    secondRun = true;
                }
                try {
                    PlotSquared.get().getBackgroundUUIDPipeline().getNames(uuidList).get();
                    // Clear the list if we successfully index all the names
                    uuidList.clear();
                    // Print progress
                    final double percentage = ((double) read / (double) totalSize) * 100.0D;
                    if (Settings.DEBUG) {
                        logger.info("[P2] (UUID) PlotSquared has cached {} of UUIDs", String.format("%.1f%%", percentage));
                    }
                } catch (final InterruptedException | ExecutionException e) {
                    logger.error("[P2] (UUID) Failed to retrieve last batch. Will try again", e);
                }
            }
            logger.info("[P2] (UUID) PlotSquared has cached all UUIDs");
        }, 10, TimeUnit.SECONDS);
    }

    @Override public void onDisable() {
        PlotSquared.get().disable();
        Bukkit.getScheduler().cancelTasks(this);
    }

    @Override public void shutdown() {
        this.getServer().getPluginManager().disablePlugin(this);
    }

    private void registerCommands() {
        final BukkitCommand bukkitCommand = new BukkitCommand();
        final PluginCommand plotCommand = getCommand("plots");
        if (plotCommand != null) {
            plotCommand.setExecutor(bukkitCommand);
            plotCommand.setAliases(Arrays.asList("p", "ps", "plotme", "plot"));
            plotCommand.setTabCompleter(bukkitCommand);
        }
    }

    @Override public File getDirectory() {
        return getDataFolder();
    }

    @Override public File getWorldContainer() {
        return Bukkit.getWorldContainer();
    }

    @SuppressWarnings("deprecation") private void runEntityTask() {
        logger.info("[P2] KillAllEntities started");
        TaskManager.runTaskRepeat(() -> this.plotAreaManager.forEachPlotArea(plotArea -> {
            final World world = Bukkit.getWorld(plotArea.getWorldName());
            try {
                if (world == null) {
                    return;
                }
                List<Entity> entities = world.getEntities();
                Iterator<Entity> iterator = entities.iterator();
                while (iterator.hasNext()) {
                    Entity entity = iterator.next();
                    switch (entity.getType().toString()) {
                        case "EGG":
                        case "FISHING_HOOK":
                        case "ENDER_SIGNAL":
                        case "AREA_EFFECT_CLOUD":
                        case "EXPERIENCE_ORB":
                        case "LEASH_HITCH":
                        case "FIREWORK":
                        case "LIGHTNING":
                        case "WITHER_SKULL":
                        case "UNKNOWN":
                        case "PLAYER":
                            // non moving / unmovable
                            continue;
                        case "THROWN_EXP_BOTTLE":
                        case "SPLASH_POTION":
                        case "SNOWBALL":
                        case "SHULKER_BULLET":
                        case "SPECTRAL_ARROW":
                        case "ENDER_PEARL":
                        case "ARROW":
                        case "LLAMA_SPIT":
                        case "TRIDENT":
                            // managed elsewhere | projectile
                            continue;
                        case "ITEM_FRAME":
                        case "PAINTING":
                            // Not vehicles
                            continue;
                        case "ARMOR_STAND":
                            // Temporarily classify as vehicle
                        case "MINECART":
                        case "MINECART_CHEST":
                        case "MINECART_COMMAND":
                        case "MINECART_FURNACE":
                        case "MINECART_HOPPER":
                        case "MINECART_MOB_SPAWNER":
                        case "ENDER_CRYSTAL":
                        case "MINECART_TNT":
                        case "BOAT":
                            if (Settings.Enabled_Components.KILL_ROAD_VEHICLES) {
                                com.plotsquared.core.location.Location location = BukkitUtil.adapt(entity.getLocation());
                                Plot plot = location.getPlot();
                                if (plot == null) {
                                    if (location.isPlotArea()) {
                                        if (entity.hasMetadata("ps-tmp-teleport")) {
                                            continue;
                                        }
                                        iterator.remove();
                                        entity.remove();
                                    }
                                    continue;
                                }
                                List<MetadataValue> meta = entity.getMetadata("plot");
                                if (meta.isEmpty()) {
                                    continue;
                                }
                                Plot origin = (Plot) meta.get(0).value();
                                if (!plot.equals(origin.getBasePlot(false))) {
                                    if (entity.hasMetadata("ps-tmp-teleport")) {
                                        continue;
                                    }
                                    iterator.remove();
                                    entity.remove();
                                }
                            }
                            continue;
                        case "SMALL_FIREBALL":
                        case "FIREBALL":
                        case "DRAGON_FIREBALL":
                        case "DROPPED_ITEM":
                            if (Settings.Enabled_Components.KILL_ROAD_ITEMS
                                && plotArea.getOwnedPlotAbs(BukkitUtil.adapt(entity.getLocation())) == null) {
                                entity.remove();
                            }
                            // dropped item
                            continue;
                        case "PRIMED_TNT":
                        case "FALLING_BLOCK":
                            // managed elsewhere
                            continue;
                        case "SHULKER":
                            if (Settings.Enabled_Components.KILL_ROAD_MOBS) {
                                LivingEntity livingEntity = (LivingEntity) entity;
                                List<MetadataValue> meta = entity.getMetadata("shulkerPlot");
                                if (!meta.isEmpty()) {
                                    if (livingEntity.isLeashed()) {
                                        continue;
                                    }
                                    List<MetadataValue> keep = entity.getMetadata("keep");
                                    if (!keep.isEmpty()) {
                                        continue;
                                    }

                                    PlotId originalPlotId = (PlotId) meta.get(0).value();
                                    if (originalPlotId != null) {
                                        com.plotsquared.core.location.Location pLoc = BukkitUtil.adapt(entity.getLocation());
                                        PlotArea area = pLoc.getPlotArea();
                                        if (area != null) {
                                            PlotId currentPlotId = area.getPlotAbs(pLoc).getId();
                                            if (!originalPlotId.equals(currentPlotId) && (currentPlotId == null || !area.getPlot(originalPlotId)
                                                .equals(area.getPlot(currentPlotId)))) {
                                                if (entity.hasMetadata("ps-tmp-teleport")) {
                                                    continue;
                                                }
                                                iterator.remove();
                                                entity.remove();
                                            }
                                        }
                                    }
                                } else {
                                    //This is to apply the metadata to already spawned shulkers (see EntitySpawnListener.java)
                                    com.plotsquared.core.location.Location pLoc = BukkitUtil.adapt(entity.getLocation());
                                    PlotArea area = pLoc.getPlotArea();
                                    if (area != null) {
                                        PlotId currentPlotId = area.getPlotAbs(pLoc).getId();
                                        if (currentPlotId != null) {
                                            entity.setMetadata("shulkerPlot", new FixedMetadataValue((Plugin) PlotSquared.platform(), currentPlotId));
                                        }
                                    }
                                }
                            }
                            continue;
                        case "ZOMBIFIED_PIGLIN":
                        case "LLAMA":
                        case "DONKEY":
                        case "MULE":
                        case "ZOMBIE_HORSE":
                        case "SKELETON_HORSE":
                        case "HUSK":
                        case "ELDER_GUARDIAN":
                        case "WITHER_SKELETON":
                        case "STRAY":
                        case "ZOMBIE_VILLAGER":
                        case "EVOKER":
                        case "EVOKER_FANGS":
                        case "VEX":
                        case "VINDICATOR":
                        case "POLAR_BEAR":
                        case "BAT":
                        case "BLAZE":
                        case "CAVE_SPIDER":
                        case "CHICKEN":
                        case "COW":
                        case "CREEPER":
                        case "ENDERMAN":
                        case "ENDERMITE":
                        case "ENDER_DRAGON":
                        case "GHAST":
                        case "GIANT":
                        case "GUARDIAN":
                        case "HORSE":
                        case "IRON_GOLEM":
                        case "MAGMA_CUBE":
                        case "MUSHROOM_COW":
                        case "OCELOT":
                        case "PIG":
                        case "PIG_ZOMBIE":
                        case "RABBIT":
                        case "SHEEP":
                        case "SILVERFISH":
                        case "SKELETON":
                        case "SLIME":
                        case "SNOWMAN":
                        case "SPIDER":
                        case "SQUID":
                        case "VILLAGER":
                        case "WITCH":
                        case "WITHER":
                        case "WOLF":
                        case "ZOMBIE":
                        case "PARROT":
                        case "SALMON":
                        case "DOLPHIN":
                        case "TROPICAL_FISH":
                        case "DROWNED":
                        case "COD":
                        case "TURTLE":
                        case "PUFFERFISH":
                        case "PHANTOM":
                        case "ILLUSIONER":
                        case "CAT":
                        case "PANDA":
                        case "FOX":
                        case "PILLAGER":
                        case "TRADER_LLAMA":
                        case "WANDERING_TRADER":
                        case "RAVAGER":
                        case "BEE":
                        case "HOGLIN":
                        case "PIGLIN":
                        case "ZOGLIN":
                        default: {
                            if (Settings.Enabled_Components.KILL_ROAD_MOBS) {
                                Location location = entity.getLocation();
                                if (BukkitUtil.adapt(location).isPlotRoad()) {
                                    if (entity instanceof LivingEntity) {
                                        LivingEntity livingEntity = (LivingEntity) entity;
                                        if (!livingEntity.isLeashed() || !entity.hasMetadata("keep")) {
                                            Entity passenger = entity.getPassenger();
                                            if (!(passenger instanceof Player) && entity.getMetadata("keep").isEmpty()) {
                                                if (entity.hasMetadata("ps-tmp-teleport")) {
                                                    continue;
                                                }
                                                iterator.remove();
                                                entity.remove();
                                                continue;
                                            }
                                        }
                                    } else {
                                        Entity passenger = entity.getPassenger();
                                        if (!(passenger instanceof Player) && entity.getMetadata("keep").isEmpty()) {
                                            if (entity.hasMetadata("ps-tmp-teleport")) {
                                                continue;
                                            }
                                            iterator.remove();
                                            entity.remove();
                                            continue;
                                        }
                                    }
                                }
                            }
                            continue;
                        }
                    }
                }
            } catch (Throwable e) {
                e.printStackTrace();
            }
        }), TaskTime.seconds(1L));
    }

    @Override @Nullable public final ChunkGenerator getDefaultWorldGenerator(@Nonnull final String worldName, final String id) {
        final IndependentPlotGenerator result;
        if (id != null && id.equalsIgnoreCase("single")) {
            result = getInjector().getInstance(SingleWorldGenerator.class);
        } else {
            result = getInjector().getInstance(Key.get(IndependentPlotGenerator.class, DefaultGenerator.class));
            if (!PlotSquared.get().setupPlotWorld(worldName, id, result)) {
                return null;
            }
        }
        return (ChunkGenerator) result.specify(worldName);
    }

    @Override @Nullable public GeneratorWrapper<?> getGenerator(@Nonnull final String world, @Nullable final String name) {
        if (name == null) {
            return null;
        }
        final Plugin genPlugin = Bukkit.getPluginManager().getPlugin(name);
        if (genPlugin != null && genPlugin.isEnabled()) {
            ChunkGenerator gen = genPlugin.getDefaultWorldGenerator(world, "");
            if (gen instanceof GeneratorWrapper<?>) {
                return (GeneratorWrapper<?>) gen;
            }
            return new BukkitPlotGenerator(world, gen, this.plotAreaManager);
        } else {
            return new BukkitPlotGenerator(world, getInjector().getInstance(Key.get(IndependentPlotGenerator.class, DefaultGenerator.class)),
                this.plotAreaManager);
        }
    }

    @Override public void startMetrics() {
        if (this.metricsStarted) {
            return;
        }
        this.metricsStarted = true;
        Metrics metrics = new Metrics(this, BSTATS_ID);// bstats
        metrics.addCustomChart(new Metrics.DrilldownPie("area_types", () -> {
            final Map<String, Map<String, Integer>> map = new HashMap<>();
            for (final PlotAreaType plotAreaType : PlotAreaType.values()) {
                final Map<String, Integer> terrainTypes = new HashMap<>();
                for (final PlotAreaTerrainType plotAreaTerrainType : PlotAreaTerrainType.values()) {
                    terrainTypes.put(plotAreaTerrainType.name().toLowerCase(), 0);
                }
                map.put(plotAreaType.name().toLowerCase(), terrainTypes);
            }
            for (final PlotArea plotArea : this.plotAreaManager.getAllPlotAreas()) {
                final Map<String, Integer> terrainTypeMap = map.get(plotArea.getType().name().toLowerCase());
                terrainTypeMap.put(plotArea.getTerrain().name().toLowerCase(), terrainTypeMap.get(plotArea.getTerrain().name().toLowerCase()) + 1);
            }
            return map;
        }));
        metrics.addCustomChart(new Metrics.SimplePie("premium", () -> PremiumVerification.isPremium() ? "Premium" : "Non-Premium"));
        metrics.addCustomChart(new Metrics.SimplePie("worldedit_implementation",
            () -> Bukkit.getPluginManager().getPlugin("FastAsyncWorldEdit") != null ? "FastAsyncWorldEdit" : "WorldEdit"));
    }

    @Override public void unregister(@Nonnull final PlotPlayer<?> player) {
        PlotSquared.platform().getPlayerManager().removePlayer(player.getUUID());
    }

    @Override public void setGenerator(@Nonnull final String worldName) {
        World world = BukkitUtil.getWorld(worldName);
        if (world == null) {
            // create world
            ConfigurationSection worldConfig = this.worldConfiguration.getConfigurationSection("worlds." + worldName);
            String manager = worldConfig.getString("generator.plugin", getPluginName());
            PlotAreaBuilder builder =
                PlotAreaBuilder.newBuilder().plotManager(manager).generatorName(worldConfig.getString("generator.init", manager))
                    .plotAreaType(ConfigurationUtil.getType(worldConfig)).terrainType(ConfigurationUtil.getTerrain(worldConfig))
                    .settingsNodesWrapper(new SettingsNodesWrapper(new ConfigurationNode[0], null)).worldName(worldName);
            getInjector().getInstance(SetupUtils.class).setupWorld(builder);
            world = Bukkit.getWorld(worldName);
        } else {
            try {
                if (!this.plotAreaManager.hasPlotArea(worldName)) {
                    SetGenCB.setGenerator(BukkitUtil.getWorld(worldName));
                }
            } catch (final Exception e) {
                logger.error("[P2] Failed to reload world: {} | {}", world, e.getMessage());
                Bukkit.getServer().unloadWorld(world, false);
                return;
            }
        }
        assert world != null;
        ChunkGenerator gen = world.getGenerator();
        if (gen instanceof BukkitPlotGenerator) {
            PlotSquared.get().loadWorld(worldName, (BukkitPlotGenerator) gen);
        } else if (gen != null) {
            PlotSquared.get().loadWorld(worldName, new BukkitPlotGenerator(worldName, gen, this.plotAreaManager));
        } else if (this.worldConfiguration.contains("worlds." + worldName)) {
            PlotSquared.get().loadWorld(worldName, null);
        }
    }

    @Override public String getNMSPackage() {
        final String name = Bukkit.getServer().getClass().getPackage().getName();
        return name.substring(name.lastIndexOf('.') + 1);
    }

    @Override public GeneratorWrapper<?> wrapPlotGenerator(@Nullable final String world, @Nonnull final IndependentPlotGenerator generator) {
        return new BukkitPlotGenerator(world, generator, this.plotAreaManager);
    }

    @Override public List<Map.Entry<Map.Entry<String, String>, Boolean>> getPluginIds() {
        List<Map.Entry<Map.Entry<String, String>, Boolean>> names = new ArrayList<>();
        for (final Plugin plugin : Bukkit.getPluginManager().getPlugins()) {
            Map.Entry<String, String> id = new AbstractMap.SimpleEntry<>(plugin.getName(), plugin.getDescription().getVersion());
            names.add(new AbstractMap.SimpleEntry<>(id, plugin.isEnabled()));
        }
        return names;
    }

    @Override @Nonnull public com.plotsquared.core.location.World<?> getPlatformWorld(@Nonnull final String worldName) {
        return BukkitWorld.of(worldName);
    }

    @Override @Nonnull public Audience getConsoleAudience() {
        return BukkitUtil.BUKKIT_AUDIENCES.audience(Bukkit.getConsoleSender());
    }

    @Override public String getPluginName() {
        return this.pluginName;
    }

    public SingleWorldListener getSingleWorldListener() {
        return this.singleWorldListener;
    }

    @Override public Injector getInjector() {
        return this.injector;
    }

    @Nonnull @Override public Locale getLocale() {
        return this.serverLocale;
    }

    @Override public void setLocale(@Nonnull final Locale locale) {
        throw new UnsupportedOperationException("Cannot replace server locale");
    }

    @Override @Nonnull public PlatformWorldManager<?> getWorldManager() {
        return getInjector().getInstance(Key.get(new TypeLiteral<PlatformWorldManager<World>>() {
        }));
    }

    @Override @Nonnull @SuppressWarnings("ALL") public PlayerManager<? extends PlotPlayer<Player>, ? extends Player> getPlayerManager() {
        return (PlayerManager<BukkitPlayer, Player>) getInjector().getInstance(PlayerManager.class);
    }

}