2 // This file is part of Moodle - http://moodle.org/
4 // Moodle is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
9 // Moodle is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
14 // You should have received a copy of the GNU General Public License
15 // along with Moodle. If not, see <http://www.gnu.org/licenses/>.
18 * Defines backup_chat_activity_task class
22 * @copyright 2010 onwards Dongsheng Cai <dongsheng@moodle.com>
23 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
26 defined('MOODLE_INTERNAL') || die();
28 require_once($CFG->dirroot . '/mod/chat/backup/moodle2/backup_chat_stepslib.php');
31 * Provides the steps to perform one complete backup of the Chat instance
33 class backup_chat_activity_task extends backup_activity_task {
36 * No specific settings for this activity
38 protected function define_my_settings() {
42 * Defines a backup step to store the instance data in the chat.xml file
44 protected function define_my_steps() {
45 $this->add_step(new backup_chat_activity_structure_step('chat_structure', 'chat.xml'));
49 * Encodes URLs to the index.php and view.php scripts
51 * @param string $content some HTML text that eventually contains URLs to the activity instance scripts
52 * @return string the content with the URLs encoded
54 static public function encode_content_links($content) {
57 $base = preg_quote($CFG->wwwroot . '/mod/chat', '#');
59 // Link to the list of chats.
60 $pattern = "#(".$base."\/index.php\?id\=)([0-9]+)#";
61 $content = preg_replace($pattern, '$@CHATINDEX*$2@$', $content);
63 // Link to chat view by moduleid.
64 $pattern = "#(".$base."\/view.php\?id\=)([0-9]+)#";
65 $content = preg_replace($pattern, '$@CHATVIEWBYID*$2@$', $content);