Dongsheng Cai
86 lines
2.8 KiB
PHP
86 lines
2.8 KiB
PHP
<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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/**
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* This is the "graphical" structure of the chat mod:
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*
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* chat
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* (CL,pk->id)
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* |
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* |
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* |
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* chat_messages
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* (UL,pk->id, fk->chatid)
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*
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* Meaning: pk->primary key field of the table
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* fk->foreign key to link with parent
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* nt->nested field (recursive data)
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* CL->course level info
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* UL->user level info
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*
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* @package moodlecore
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* @subpackage backup-moodle2
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* @copyright 2010 onwards Dongsheng Cai <dongsheng@moodle.com>
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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require_once($CFG->dirroot . '/mod/chat/backup/moodle2/backup_chat_stepslib.php'); // Because it exists (must)
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/**
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* chat backup task that provides all the settings and steps to perform one
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* complete backup of the activity
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*/
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class backup_chat_activity_task extends backup_activity_task {
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/**
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* Define (add) particular settings this activity can have
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*/
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protected function define_my_settings() {
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// No particular settings for this activity
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}
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/**
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* Define (add) particular steps this activity can have
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*/
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protected function define_my_steps() {
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// chat only has one structure step
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$this->add_step(new backup_chat_activity_structure_step('chat_structure', 'chat.xml'));
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}
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/**
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* Code the transformations to perform in the chat activity in
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* order to get transportable (encoded) links
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*
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* @param string $content
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* @return string
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*/
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static public function encode_content_links($content) {
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global $CFG;
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$base = preg_quote($CFG->wwwroot.'/mod/chat','#');
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//Link to the list of chats
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$pattern = "#(".$base."\/index.php\?id\=)([0-9]+)#";
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$content = preg_replace($pattern, '$@CHATINDEX*$2@$', $content);
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//Link to chat view by moduleid
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$pattern = "#(".$base."\/view.php\?id\=)([0-9]+)#";
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$content = preg_replace($pattern, '$@CHATVIEWBYID*$2@$', $content);
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return $content;
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}
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}
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