PlaceholderAPI/src/main/java/me/clip/placeholderapi/PlaceholderAPIPlugin.java

/*
 *
 * PlaceholderAPI
 * Copyright (C) 2019 Ryan McCarthy
 *
 * 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 me.clip.placeholderapi;

import me.clip.placeholderapi.commands.PlaceholderCommandRouter;
import me.clip.placeholderapi.configuration.PlaceholderAPIConfig;
import me.clip.placeholderapi.expansion.PlaceholderExpansion;
import me.clip.placeholderapi.expansion.Version;
import me.clip.placeholderapi.expansion.manager.CloudExpansionManager;
import me.clip.placeholderapi.expansion.manager.LocalExpansionManager;
import me.clip.placeholderapi.listeners.ServerLoadEventListener;
import me.clip.placeholderapi.updatechecker.UpdateChecker;
import org.bstats.bukkit.Metrics;
import org.bukkit.Bukkit;
import org.bukkit.command.CommandSender;
import org.bukkit.command.PluginCommand;
import org.bukkit.event.HandlerList;
import org.bukkit.plugin.java.JavaPlugin;
import org.jetbrains.annotations.NotNull;

import java.text.SimpleDateFormat;
import java.util.HashMap;
import java.util.Map;
import java.util.logging.Level;

/**
 * Yes I have a shit load of work to do...
 *
 * @author Ryan McCarthy
 */
public final class PlaceholderAPIPlugin extends JavaPlugin
{

	@NotNull
	private static final Version VERSION;

	static
	{
		final String version = Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3];

		boolean isSpigot;
		try
		{
			Class.forName("org.spigotmc.SpigotConfig");
			isSpigot = true;
		}
		catch (final ExceptionInInitializerError | ClassNotFoundException ignored)
		{
			isSpigot = false;
		}

		VERSION = new Version(version, isSpigot);
	}

	private static PlaceholderAPIPlugin instance;

	@NotNull
	private final PlaceholderAPIConfig config = new PlaceholderAPIConfig(this);

	@NotNull
	private final LocalExpansionManager localExpansionManager = new LocalExpansionManager(this);
	@NotNull
	private final CloudExpansionManager cloudExpansionManager = new CloudExpansionManager(this);


	@Override
	public void onLoad()
	{
		instance = this;

		saveDefaultConfig();
	}

	@Override
	public void onEnable()
	{
		setupCommand();
		setupMetrics();
		setupExpansions();

		if (config.isCloudEnabled())
		{
			getCloudExpansionManager().load();
		}

		if (config.checkUpdates())
		{
			new UpdateChecker(this).fetch();
		}
	}

	@Override
	public void onDisable()
	{
		getCloudExpansionManager().kill();
		getLocalExpansionManager().kill();

		HandlerList.unregisterAll(this);

		Bukkit.getScheduler().cancelTasks(this);

		instance = null;
	}


	public void reloadConf(@NotNull final CommandSender sender)
	{
		getLocalExpansionManager().kill();

		reloadConfig();

		getLocalExpansionManager().load(sender);

		if (config.isCloudEnabled())
		{
			getCloudExpansionManager().load();
		}
		else
		{
			getCloudExpansionManager().kill();
		}
	}


	@NotNull
	public LocalExpansionManager getLocalExpansionManager()
	{
		return localExpansionManager;
	}

	@NotNull
	public CloudExpansionManager getCloudExpansionManager()
	{
		return cloudExpansionManager;
	}


	/**
	 * Obtain the configuration class for PlaceholderAPI.
	 *
	 * @return PlaceholderAPIConfig instance
	 */
	@NotNull
	public PlaceholderAPIConfig getPlaceholderAPIConfig()
	{
		return config;
	}


	private void setupCommand()
	{
		final PluginCommand pluginCommand = getCommand("placeholderapi");
		if (pluginCommand == null)
		{
			return;
		}

		final PlaceholderCommandRouter router = new PlaceholderCommandRouter(this);
		pluginCommand.setExecutor(router);
		pluginCommand.setTabCompleter(router);
	}

	private void setupMetrics()
	{
		final Metrics metrics = new Metrics(this);
		metrics.addCustomChart(new Metrics.SimplePie("using_expansion_cloud", () -> getPlaceholderAPIConfig().isCloudEnabled() ? "yes" : "no"));

		metrics.addCustomChart(new Metrics.SimplePie("using_spigot", () -> getServerVersion().isSpigot() ? "yes" : "no"));

		metrics.addCustomChart(new Metrics.AdvancedPie("expansions_used", () -> {
			final Map<String, Integer> values = new HashMap<>();

			for (final PlaceholderExpansion expansion : getLocalExpansionManager().getExpansions())
			{
				values.put(expansion.getRequiredPlugin() == null ? expansion.getIdentifier() : expansion.getRequiredPlugin(), 1);
			}

			return values;
		}));
	}

	private void setupExpansions()
	{
		Bukkit.getPluginManager().registerEvents(getLocalExpansionManager(), this);

		try
		{
			Class.forName("org.bukkit.event.server.ServerLoadEvent");
			new ServerLoadEventListener(this);
		}
		catch (final ExceptionInInitializerError | ClassNotFoundException ignored)
		{
			Bukkit.getScheduler().runTaskLater(this, () -> getLocalExpansionManager().load(Bukkit.getConsoleSender()), 1);
		}
	}


	/**
	 * Gets the static instance of the main class for PlaceholderAPI. This class is not the actual API
	 * class, this is the main class that extends JavaPlugin. For most API methods, use static methods
	 * available from the class: {@link PlaceholderAPI}
	 *
	 * @return PlaceholderAPIPlugin instance
	 */
	@NotNull
	public static PlaceholderAPIPlugin getInstance()
	{
		return instance;
	}


	/**
	 * Get the configurable {@linkplain String} value that should be returned when a boolean is true
	 *
	 * @return string value of true
	 */
	@NotNull
	public static String booleanTrue()
	{
		return getInstance().getPlaceholderAPIConfig().booleanTrue();
	}

	/**
	 * Get the configurable {@linkplain String} value that should be returned when a boolean is false
	 *
	 * @return string value of false
	 */
	@NotNull
	public static String booleanFalse()
	{
		return getInstance().getPlaceholderAPIConfig().booleanFalse();
	}

	/**
	 * Get the configurable {@linkplain SimpleDateFormat} object that is used to parse time for
	 * generic time based placeholders
	 *
	 * @return date format
	 */
	@NotNull
	public static SimpleDateFormat getDateFormat()
	{
		try
		{
			return new SimpleDateFormat(getInstance().getPlaceholderAPIConfig().dateFormat());
		}
		catch (final IllegalArgumentException ex)
		{
			getInstance().getLogger().log(Level.WARNING, "configured date format is invalid", ex);
			return new SimpleDateFormat("MM/dd/yy HH:mm:ss");
		}
	}


	public static Version getServerVersion()
	{
		return VERSION;
	}

}