<?php
/*
 * Copyright (c) 2010-2018 Tim Düsterhus.
 *
 * Use of this software is governed by the Business Source License
 * included in the LICENSE file.
 *
 * Change Date: 2024-10-20
 *
 * On the date above, in accordance with the Business Source
 * License, use of this software will be governed by version 2
 * or later of the General Public License.
 */

namespace chat\page;

use \wcf\system\exception\IllegalLinkException;
use \wcf\system\exception\NamedUserException;
use \wcf\system\exception\PermissionDeniedException;
use \wcf\system\WCF;

/**
 * Shows a specific chat room.
 */
class RoomPage extends \wcf\page\AbstractPage {
	use TConfiguredPage;

	/**
	 * Almost dummy attachment handler (used in language variable)
	 *
	 * @var	\wcf\system\attachment\AttachmentHandler
	 */
	public $attachmentHandler;

	/**
	 * @inheritDoc
	 */
	public $loginRequired = true;

	/**
	 * The requested chat room ID.
	 *
	 * @param	int
	 */
	public $roomID = 0;

	/**
	 * The requested chat room.
	 *
	 * @param	\chat\data\room\Room
	 */
	public $room = null;

	/**
	 * @inheritDoc
	 */
	public function readParameters() {
		parent::readParameters();

		if (isset($_GET['id'])) $this->roomID = intval($_GET['id']);
		$this->room = \chat\data\room\RoomCache::getInstance()->getRoom($this->roomID);

		if ($this->room === null) throw new IllegalLinkException();
		if (!$this->room->canSee($user = null, $reason)) throw $reason;
		if (!$this->room->canJoin($user = null, $reason)) throw $reason;

		$this->canonicalURL = $this->room->getLink();
	}

	/**
	 * @inheritDoc
	 */
	public function checkPermissions() {
		parent::checkPermissions();

		$package = \wcf\data\package\PackageCache::getInstance()->getPackageByIdentifier('be.bastelstu.chat');
		if (stripos($package->packageVersion, 'Alpha') !== false) {
			$sql = "SELECT COUNT(*) FROM wcf".WCF_N."_user";
			$statement = WCF::getDB()->prepareStatement($sql);
			$statement->execute();
			$userCount = $statement->fetchSingleColumn();
			if ((($userCount > 5 && !OFFLINE) || ($userCount > 30 && OFFLINE)) && sha1(WCF_UUID) !== '643a6b3af2a6ea3d393c4d8371e75d7d1b66e0d0') {
				throw new PermissionDeniedException("Do not use alpha versions of Tims Chat in production communities!");
			}
		}
	}

	/**
	 * @inheritDoc
	 */
	public function readData() {
		$sql = "SELECT 1";
		$statement = WCF::getDB()->prepareStatement($sql);
		$statement->execute();
		if ($statement->fetchSingleColumn() !== 1) {
			throw new NamedUserException('PHP must be configured to use the MySQLnd driver, instead of libmysqlclient.');
		}

		parent::readData();

		// This attachment handler gets only used for the language variable `wcf.attachment.upload.limits`!
		$this->attachmentHandler = new \wcf\system\attachment\AttachmentHandler('be.bastelstu.chat.message', 0, 'DEADC0DE00000000DEADC0DE00000000DEADC0DE', $this->room->roomID);

		$pushHandler = \wcf\system\push\PushHandler::getInstance();
		$pushHandler->joinChannel('be.bastelstu.chat');
		$pushHandler->joinChannel('be.bastelstu.chat.room-'.$this->room->roomID);
	}

	/**
	 * @inheritDoc
	 */
	public function assignVariables() {
		parent::assignVariables();

		WCF::getTPL()->assign([ 'room' => $this->room
		                      , 'config' => $this->getConfig()
		                      , 'attachmentHandler' => $this->attachmentHandler
		                      ]);
	}
}