<?php
/******************************* PHP-P10 v2 *****************************
 * Copyright (C) 2011-2012  Philipp Kreil (pk910)                       *
 *                                                                      *
 * 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/>. *
 *                                                                      *
 ************************************************************************
 *
 *  Uplink/P10_Channel.class.php
 *
 * This class represents a IRC Channel
 *
 */

class P10_Channel {
	private static $static_channels = array();

	public static function getChannelByName($name) {
		$name = strtolower($name);
		if(array_key_exists($name, self::$static_channels)) {
			return self::$static_channels[$name];
		}
		return NULL;
	}

	public static function getChannels() {
		return self::$static_channels;
	}

	public static function getChannelCount() {
		return count(self::$static_channels);
	}

	public static function recheckAllChannels() {
		foreach(self::$static_channels as $channel) {
			$channel->checkChannel();
		}
	}

	private $name;
	private $topic;
	private $modes;
	private $create_time;
	private $users = array();
	const USERPRIV_OPED  = 0x0001;
	const USERPRIV_HALFOP = 0x0002;
	const USERPRIV_VOICE = 0x0004;
	private $userPrivs = array();

	public function __construct($name) {
		$this->name = $name;
		$this->modes = new P10_ChannelModeSet($this);
		$this->create_time = time();
		self::$static_channels[strtolower($name)] = $this;
	}

	public function getName() {
		return $this->name;
	}

	public function getModes() {
		return $this->modes;
	}

	public function setTopic($topic) {
		$this->topic = $topic;
	}

	public function getTopic() {
		return $this->topic;
	}

	public function setCreateTime($time) {
		$this->create_time = $time;
	}

	public function getCreateTime() {
		return $this->create_time;
	}

	public function joinUser($user) {
		$this->users[$user->getNumeric()] = $user;
		$this->userPrivs[$user->getNumeric()] = 0;
		$user->addChannel($this);
	}

	public function burstUser($user, $opped, $halfopped, $voiced) {
		$this->users[$user->getNumeric()] = $user;
		$this->userPrivs[$user->getNumeric()] = ($opped ? self::USERPRIV_OPED : 0) | ($halfopped ? self::USERPRIV_HALFOP : 0) | ($voiced ? self::USERPRIV_VOICE : 0);
		$user->addChannel($this);
	}

	private function checkChannel() {
		if(count($this->users) == 0 && !$this->modes->hasMode('z')) {
			unset(self::$static_channels[strtolower($this->name)]); //drop empty channel
		}
	}

	public function quitUser($user) {
		if(array_key_exists($user->getNumeric(), $this->users)) {
			unset($this->users[$user->getNumeric()]);
			unset($this->userPrivs[$user->getNumeric()]);
			//$user->delChannel($this)  is not necessary because the user quits (the whole Object gets removed later)
			$this->checkChannel();
		} else {
			trigger_error("Tried to quit a User from a Channel it is not joined.", E_USER_WARNING);
		}
	}

	public function partUser($user) {
		if(array_key_exists($user->getNumeric(), $this->users)) {
			unset($this->users[$user->getNumeric()]);
			unset($this->userPrivs[$user->getNumeric()]);
			$user->delChannel($this);
			$this->checkChannel();
		} else {
			trigger_error("Tried to part a User from a Channel it is not joined.", E_USER_WARNING);
		}
	}

	public function getUserPrivs($user) {
		if(array_key_exists($user->getNumeric(), $this->users)) {
			return $this->userPrivs[$user->getNumeric()];
		} else
		return 0;
	}

	public function setUserPrivs($user, $privs) {
		if(array_key_exists($user->getNumeric(), $this->users)) {
			$this->userPrivs[$user->getNumeric()] = $privs;
		}
	}

	public function getUserCount() {
		return count($this->users);
	}

	public function getUsers() {
		return $this->users;
	}

}

?>