<?php
/*
 * @package AJAX_Chat
 * @author Sebastian Tschan
 * @copyright (c) Sebastian Tschan
 * @license GNU Affero General Public License
 * @link https://blueimp.net/ajax/
 *
 * phpBB2 integration:
 * http://www.phpbb.com/
 */

class CustomAJAXChat extends AJAXChat {

    // Initialize custom configuration settings
    function initCustomConfig() {
        global $db;

        // Use the existing phpBB database connection:
        $this->setConfig('dbConnection', 'link', $db->db_connect_id);
    }

    // Initialize custom request variables:
    function initCustomRequestVars() {
        global $user;

        // Auto-login phpBB users:
        if(!$this->getRequestVar('logout') && ($user->data['user_id'] != ANONYMOUS)) {
            $this->setRequestVar('login', true);
        }
    }

    // Replace custom template tags:
    function replaceCustomTemplateTags($tag, $tagContent) {
        global $user;

        switch($tag) {
            case 'SID':
                return $this->_requestVars['sid'];

            case 'FORUM_LOGIN_URL':
                if($user->data['session_logged_in']) {
                    return ($this->getRequestVar('view') == 'logs') ? './?view=logs' : './';
                } else {
                    return '../login_ip.php';
                }

            case 'REDIRECT_URL':
                if($user->data['session_logged_in']) {
                    return '';
                } else {
                    return ($this->getRequestVar('view') == 'logs' ? 'chat/?view=logs' : 'chat/');
                }

            default:
                return null;
        }
    }

    // Returns true if the userID of the logged in user is identical to the userID of the authentication system
    // or the user is authenticated as guest in the chat and the authentication system
    function revalidateUserID() {
        global $user;

        if($this->getUserRole() === AJAX_CHAT_GUEST && !$user->data['session_logged_in'] || ($this->getUserID() === $user->data['user_id'])) {
            return true;
        }
        return false;
    }

    // Returns an associative array containing userName, userID and userRole
    // Returns null if login is invalid
    function getValidLoginUserData() {
        global $user;

        // Check if we have a valid registered user:
        if($user->data['session_logged_in']) {
            $userData = array();
            $userData['userID'] = $user->data['user_id'];

            $userData['userName'] = $this->trimUserName($user->data['username']);

            if($user->data['user_level'] == ADMIN)
                $userData['userRole'] = AJAX_CHAT_ADMIN;
            elseif($user->data['user_level'] == MOD)
                $userData['userRole'] = AJAX_CHAT_MODERATOR;
            else
                $userData['userRole'] = AJAX_CHAT_USER;

            return $userData;

        } else {
            // Guest users:
            return $this->getGuestUser();
        }
    }

    // Store the channels the current user has access to
    // Make sure channel names don't contain any whitespace
    function &getChannels() {
        if($this->_channels === null) {
            global $user;

            $this->_channels = array();

            $allChannels = $this->getAllChannels();

            foreach($allChannels as $key=>$value) {
                // Check if we have to limit the available channels:
                if($this->getConfig('limitChannelList') && !in_array($value, $this->getConfig('limitChannelList'))) {
                    continue;
                }

                // Get the persmissions for the current forum_id:
                $auth = auth(AUTH_READ, $value, $user->data);

                // Add the valid channels to the channel list (the defaultChannelID is always valid):
                if($auth['auth_read'] ||  $value == $this->getConfig('defaultChannelID')) {
                    $this->_channels[$key] = $value;
                }
            }
        }
        return $this->_channels;
    }

    // Store all existing channels
    // Make sure channel names don't contain any whitespace
    function &getAllChannels() {
        if($this->_allChannels === null) {
            global $db;

            $this->_allChannels = array();

            // Get valid phpBB forums:
            $sql = 'SELECT
                            forum_id,
                            forum_name
                        FROM
                            '.FORUMS_TABLE.'
                        WHERE
                            forum_status=0;';
            $result = $db->sql_query($sql);

            $defaultChannelFound = false;

            while ($row = $db->sql_fetchrow($result)) {
                $forumName = $this->trimChannelName($row['forum_name']);

                $this->_allChannels[$forumName] = $row['forum_id'];

                if(!$defaultChannelFound && $row['forum_id'] == $this->getConfig('defaultChannelID')) {
                    $defaultChannelFound = true;
                }
            }
            $db->sql_freeresult($result);

            if(!$defaultChannelFound) {
                // Add the default channel as first array element to the channel list:
                $this->_allChannels = array_merge(
                    array(
                        $this->trimChannelName($this->getConfig('defaultChannelName'))=>$this->getConfig('defaultChannelID')
                    ),
                    $this->_allChannels
                );
            }
        }
        return $this->_allChannels;
    }

    // Method to set the style cookie depending on the phpBB user style
    function setStyle() {
        global $db,$board_config,$userdata;

        if(isset($_COOKIE[$this->getConfig('sessionName').'_style']) && in_array($_COOKIE[$this->getConfig('sessionName').'_style'], $this->getConfig('styleAvailable')))
            return;

        $styleID = (!$board_config['override_user_style'] && $user->data['user_id'] != ANONYMOUS && $user->data['user_style'] > 0) ? $user->data['user_style'] : $board_config['default_style'];
        $sql = 'SELECT
                        style_name
                    FROM
                        '.THEMES_TABLE.'
                    WHERE
                        themes_id = '.$this->db->makeSafe($styleID).';';
        $result = $db->sql_query($sql);
        $styleName = $db->sql_fetchfield('style_name');
        $db->sql_freeresult($result);

        if(!in_array($styleName, $this->getConfig('styleAvailable'))) {
            $styleName = $this->getConfig('styleDefault');
        }

        setcookie(
            $this->getConfig('sessionName').'_style',
            $styleName,
            time()+60*60*24*$this->getConfig('sessionCookieLifeTime'),
            $this->getConfig('sessionCookiePath'),
            $this->getConfig('sessionCookieDomain'),
            $this->getConfig('sessionCookieSecure')
        );
        return;
    }

}
?>