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/*
* 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 2
* 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/

package org.anjocaido.groupmanager.permissions;

import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;

import org.anjocaido.groupmanager.GroupManager;
import org.anjocaido.groupmanager.data.User;

import org.bukkit.Bukkit;
import org.bukkit.entity.Player;
import org.bukkit.event.Event;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerKickEvent;
import org.bukkit.event.player.PlayerListener;
import org.bukkit.event.player.PlayerPortalEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.event.player.PlayerRespawnEvent;
import org.bukkit.event.player.PlayerTeleportEvent;
import org.bukkit.event.server.PluginDisableEvent;
import org.bukkit.event.server.PluginEnableEvent;
import org.bukkit.event.server.ServerListener;
import org.bukkit.permissions.Permission;
import org.bukkit.permissions.PermissionAttachment;
import org.bukkit.plugin.Plugin;
import org.bukkit.plugin.PluginManager;


/**
 *
 * BukkitPermissions overrides to force GM reponses to Superperms
 *
 * @author ElgarL, based upon PermissionsEX implementation
 */
public class BukkitPermissions {

    protected Map<Player, PermissionAttachment> attachments = new HashMap<Player, PermissionAttachment>();
    protected Set<Permission> registeredPermissions = new HashSet<Permission>();
    protected Plugin plugin;
    protected boolean dumpAllPermissions = true;
    protected boolean dumpMatchedPermissions = true;

    public BukkitPermissions(Plugin plugin) {
        this.plugin = plugin;

        this.collectPermissions();
        this.registerEvents();

        this.updateAllPlayers();

        GroupManager.logger.info("Superperms support enabled.");
    }

    private void registerEvents() {
        PluginManager manager = plugin.getServer().getPluginManager();

        PlayerEvents playerEventListener = new PlayerEvents();

        manager.registerEvent(Event.Type.PLAYER_JOIN, playerEventListener, Event.Priority.Normal, plugin);
        manager.registerEvent(Event.Type.PLAYER_KICK, playerEventListener, Event.Priority.Normal, plugin);
        manager.registerEvent(Event.Type.PLAYER_QUIT, playerEventListener, Event.Priority.Normal, plugin);

        manager.registerEvent(Event.Type.PLAYER_RESPAWN, playerEventListener, Event.Priority.Normal, plugin);
        manager.registerEvent(Event.Type.PLAYER_TELEPORT, playerEventListener, Event.Priority.Normal, plugin);
        manager.registerEvent(Event.Type.PLAYER_PORTAL, playerEventListener, Event.Priority.Normal, plugin);

        ServerListener serverListener = new BukkitEvents();

        manager.registerEvent(Event.Type.PLUGIN_ENABLE, serverListener, Event.Priority.Normal, plugin);
        manager.registerEvent(Event.Type.PLUGIN_DISABLE, serverListener, Event.Priority.Normal, plugin);
    }

    private void collectPermissions() {
        registeredPermissions.clear();
        for (Plugin bukkitPlugin : Bukkit.getServer().getPluginManager().getPlugins()) {
            registeredPermissions.addAll(bukkitPlugin.getDescription().getPermissions());
        }
    }
    
    public void updatePermissions(Player player){
        this.updatePermissions(player, null);
    }
    
    public void updatePermissions(Player player, String world) {
        if (player == null || !this.plugin.isEnabled()) {
            return;
        }

        if (!this.attachments.containsKey(player)) {
            this.attachments.put(player, player.addAttachment(plugin));
        }

        if(world == null){
            world = player.getWorld().getName();
        }
        
        PermissionAttachment attachment = this.attachments.get(player);

        User user =  GroupManager.getWorldsHolder().getWorldData(world).getUser(player.getName());

        // clear permissions
        for (String permission : attachment.getPermissions().keySet()) {
            attachment.unsetPermission(permission);
        }

        for (Permission permission : registeredPermissions) {
            boolean permissionValue = user.getGroup().hasSamePermissionNode(permission.getName());

            //GroupManager.logger.info(permission.getName() + " : " + Boolean.toString(permissionValue));

            attachment.setPermission(permission, permissionValue);
        }    

        player.recalculatePermissions();

    }

    public void updateAllPlayers() {
        for (Player player : Bukkit.getServer().getOnlinePlayers()) {
            updatePermissions(player);
        }
    }

    protected class PlayerEvents extends PlayerListener {

        @Override
        public void onPlayerJoin(PlayerJoinEvent event) {
            updatePermissions(event.getPlayer());
        }

        @Override
        public void onPlayerPortal(PlayerPortalEvent event) { // will portal into another world
            if(event.getPlayer().getWorld().equals(event.getTo().getWorld())){ // only if world actually changed
                return;
            }
            
            updatePermissions(event.getPlayer(), event.getTo().getWorld().getName());
        }

        @Override
        public void onPlayerRespawn(PlayerRespawnEvent event) { // can be respawned in another world
            updatePermissions(event.getPlayer(), event.getRespawnLocation().getWorld().getName());
        }

        @Override
        public void onPlayerTeleport(PlayerTeleportEvent event) { // can be teleported into another world
            if (!event.getFrom().getWorld().equals(event.getTo().getWorld())) { // only if world actually changed
                updatePermissions(event.getPlayer(), event.getTo().getWorld().getName());
            }
        }

        @Override
        public void onPlayerQuit(PlayerQuitEvent event) {
            attachments.remove(event.getPlayer());
        }

        @Override
        public void onPlayerKick(PlayerKickEvent event) {
            attachments.remove(event.getPlayer());
        }
    }

    protected class BukkitEvents extends ServerListener {

        @Override
        public void onPluginEnable(PluginEnableEvent event) {
            collectPermissions();
            updateAllPlayers();
        }

        @Override
        public void onPluginDisable(PluginDisableEvent event) {
            collectPermissions();
            updateAllPlayers();
        }
    }

}