<?php
namespace chat\page;
use \chat\data;
use \wcf\system\WCF;

/**
 * Shows the chat-interface
 *
 * @author 	Tim Düsterhus
 * @copyright	2010-2013 Tim Düsterhus
 * @license	Creative Commons Attribution-NonCommercial-ShareAlike <http://creativecommons.org/licenses/by-nc-sa/3.0/legalcode>
 * @package	be.bastelstu.chat
 * @subpackage	page
 */
class ChatPage extends \wcf\page\AbstractPage {
	/**
	 * @see wcf\page\AbstractPage::$loginRequired
	 */
	public $loginRequired = true;
	
	/**
	 * @see \wcf\page\AbstractPage::$neededModules
	 */
	public $neededModules = array('MODULE_CHAT');
	
	/**
	 * @see \wcf\page\AbstractPage::$neededPermissions
	 */
	public $neededPermissions = array();
	
	/**
	 * The last X messages for the current room.
	 * 
	 * @var array<\chat\data\message\Message>
	 */
	public $newestMessages = array();
	
	/**
	 * The current room.
	 * 
	 * @var \chat\data\room\Room
	 */
	public $room = null;
	
	/**
	 * The given roomID.
	 * 
	 * @var integer
	 */
	public $roomID = 0;
	
	/**
	 * List of accessible rooms.
	 * 
	 * @var \chat\data\room\RoomList
	 */
	public $rooms = array();
	
	/**
	 * List of smilies in the default category.
	 * 
	 * @var array<\wcf\data\smiley\Smiley>
	 * @see \wcf\data\smiley\SmileyCache
	 */
	public $defaultSmilies = array();
	
	/**
	 * List of all smiley categories.
	 * 
	 * @var array<\wcf\data\smiley\SmileyCategory>
	 * @see \wcf\data\smiley\SmileyCache
	 */
	public $smileyCategories = array();
	
	/**
	 * Values read from the UserStorage of the current user.
	 * 
	 * @var array
	 */
	public $userData = array();
	
	/**
	 * @see wcf\page\AbstractPage::$enableTracking
	 */
	public $enableTracking = true;
	
	/**
	 * @see	\wcf\page\IPage::assignVariables()
	 */
	public function assignVariables() {
		parent::assignVariables();

		WCF::getTPL()->assign(array(
			'newestMessages' => $this->newestMessages,
			'room' => $this->room,
			'roomID' => $this->roomID,
			'rooms' => $this->rooms,
			'defaultSmilies' => $this->defaultSmilies,
			'smileyCategories' => $this->smileyCategories,
			'sidebarCollapsed' => \wcf\system\user\collapsible\content\UserCollapsibleContentHandler::getInstance()->isCollapsed('com.woltlab.wcf.collapsibleSidebar', 'be.bastelstu.chat.ChatPage'),
			'sidebarName' => 'be.bastelstu.chat.ChatPage'
		));
	}
	
	/**
	 * @see	\wcf\page\IPage::readData()
	 */
	public function readData() {
		parent::readData();
		
		$this->readRoom();
		$this->userData['color'] = \chat\util\ChatUtil::readUserData('color');
		\chat\util\ChatUtil::writeUserData(array(
			'roomID' => $this->room->roomID,
			'away' => null,
			'lastActivity' => TIME_NOW
		));
		
		if (CHAT_DISPLAY_JOIN_LEAVE) {
			$messageAction = new data\message\MessageAction(array(), 'create', array(
				'data' => array(
					'roomID' => $this->room->roomID,
					'sender' => WCF::getUser()->userID,
					'username' => WCF::getUser()->username,
					'time' => TIME_NOW,
					'type' => \chat\data\message\Message::TYPE_JOIN,
					'message' => serialize(array('ipAddress' => \wcf\util\UserUtil::convertIPv6To4(\wcf\util\UserUtil::getIpAddress()))),
					'color1' => $this->userData['color'][1],
					'color2' => $this->userData['color'][2]
				)
			));
			$messageAction->executeAction();
			$messageAction->getReturnValues();
		}
		
		$this->newestMessages = data\message\MessageList::getNewestMessages($this->room, CHAT_LASTMESSAGES);
		try {
			\chat\util\ChatUtil::writeUserData(array('lastSeen' => end($this->newestMessages)->messageID));
		}
		catch (\wcf\system\exception\SystemException $e) {
			\chat\util\ChatUtil::writeUserData(array('lastSeen' => 0));
		}
		
		// get default smilies
		if (MODULE_SMILEY) {
			$this->smileyCategories = \wcf\data\smiley\SmileyCache::getInstance()->getCategories();
			foreach ($this->smileyCategories as $index => $category) {
				$category->loadSmilies();
				
				// remove empty categories
				if (!count($category) || $category->isDisabled) {
					unset($this->smileyCategories[$index]);
				}
			}
			
			$firstCategory = reset($this->smileyCategories);
			if ($firstCategory) {
				$this->defaultSmilies = \wcf\data\smiley\SmileyCache::getInstance()->getCategorySmilies($firstCategory->categoryID ?: null);
			}
		}
	}
	
	/**
	 * @see	\wcf\page\IPage::readParameters()
	 */
	public function readParameters() {
		parent::readParameters();
		
		if (isset($_REQUEST['id'])) $this->roomID = (int) $_REQUEST['id'];
		if (isset($_REQUEST['ajax'])) $this->useTemplate = false;
	}
	
	/**
	 * Reads room data.
	 */
	public function readRoom() {
		$this->rooms = data\room\RoomCache::getInstance()->getRooms();
		
		if ($this->roomID === 0) {
			// no room given
			$room = reset($this->rooms);
			if ($room === null) {
				// no valid room found
				throw new \wcf\system\exception\IllegalLinkException();
			}
			// redirect to first chat-room
			\wcf\util\HeaderUtil::redirect(\wcf\system\request\LinkHandler::getInstance()->getLink('Chat', array(
				'object' => $room
			)));
			exit;
		}
		
		if (!isset($this->rooms[$this->roomID])) throw new \wcf\system\exception\IllegalLinkException();
		$this->room = $this->rooms[$this->roomID];
		if (!$this->room->canEnter()) throw new \wcf\system\exception\PermissionDeniedException();
	}
	
	/**
	 * @see	\wcf\page\IPage::show()
	 */
	public function show() {
		\wcf\system\menu\page\PageMenu::getInstance()->setActiveMenuItem('chat.header.menu.chat');
		
		// remove index breadcrumb
		WCF::getBreadcrumbs()->remove(0);
		
		parent::show();
		
		// add activity points
		$microtime = microtime(true) * 1000;
		$result = $microtime & 0xFFFFFFFF;
		if ($result > 0x7FFFFFFF) $result -= 0x80000000;
		\wcf\system\user\activity\point\UserActivityPointHandler::getInstance()->fireEvent('be.bastelstu.chat.activityPointEvent.join', $result, WCF::getUser()->userID);
		
		// break if not using ajax
		\wcf\system\nodePush\NodePushHandler::getInstance()->sendMessage('be.bastelstu.chat.join');
		if ($this->useTemplate) exit;
		@header('Content-type: application/json');
		
		$messages = array();
		foreach ($this->newestMessages as $message) $messages[] = $message->jsonify(true);
		echo \wcf\util\JSON::encode(array(
			'title' => $this->room->getTitle(),
			'topic' => WCF::getLanguage()->get($this->room->topic),
			'messages' => $messages
		));
		exit;
	}
	
	/**
	 * @see	wcf\page\ITrackablePage::getObjectType()
	 */
	public function getObjectType() {
		return 'be.bastelstu.chat.room';
	}
	
	/**
	 * @see	wcf\page\ITrackablePage::getObjectID()
	 */
	public function getObjectID() {
		if ($this->room === null) return 0;
		
		return $this->room->roomID;
	}
}