MDL-32862 backup: fixed missing global
[moodle.git] / mod / resource / backup / moodle2 / backup_resource_activity_task.class.php
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1<?php
2
3// This file is part of Moodle - http://moodle.org/
4//
5// Moodle is free software: you can redistribute it and/or modify
6// it under the terms of the GNU General Public License as published by
7// the Free Software Foundation, either version 3 of the License, or
8// (at your option) any later version.
9//
10// Moodle is distributed in the hope that it will be useful,
11// but WITHOUT ANY WARRANTY; without even the implied warranty of
12// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13// GNU General Public License for more details.
14//
15// You should have received a copy of the GNU General Public License
16// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
17
18/**
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19 * Defines backup_resource_activity_task class
20 *
21 * @package mod_resource
22 * @category backup
23 * @copyright 2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
24 * @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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25 */
26
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27defined('MOODLE_INTERNAL') || die;
28
63baccbc 29require_once($CFG->dirroot . '/mod/resource/backup/moodle2/backup_resource_stepslib.php');
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30
31/**
63baccbc 32 * Provides the steps to perform one complete backup of the Resource instance
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33 */
34class backup_resource_activity_task extends backup_activity_task {
35
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36 /**
37 * @param bool $resourceoldexists True if there are records in the resource_old table.
38 */
39 protected static $resourceoldexists = null;
40
a345de6e 41 /**
63baccbc 42 * No specific settings for this activity
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43 */
44 protected function define_my_settings() {
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45 }
46
47 /**
63baccbc 48 * Defines a backup step to store the instance data in the resource.xml file
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49 */
50 protected function define_my_steps() {
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51 $this->add_step(new backup_resource_activity_structure_step('resource_structure', 'resource.xml'));
52 }
53
54 /**
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55 * Encodes URLs to the index.php and view.php scripts
56 *
57 * @param string $content some HTML text that eventually contains URLs to the activity instance scripts
58 * @return string the content with the URLs encoded
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59 */
60 static public function encode_content_links($content) {
8242ca0c 61 global $CFG, $DB;
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62
63 $base = preg_quote($CFG->wwwroot,"/");
64
a3b2df62 65 // Link to the list of resources.
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66 $search="/(".$base."\/mod\/resource\/index.php\?id\=)([0-9]+)/";
67 $content= preg_replace($search, '$@RESOURCEINDEX*$2@$', $content);
68
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69 // Link to resource view by moduleid.
70 $search = "/(".$base."\/mod\/resource\/view.php\?id\=)([0-9]+)/";
71 // Link to resource view by recordid
72 $search2 = "/(".$base."\/mod\/resource\/view.php\?r\=)([0-9]+)/";
73
74 // Check whether there are contents in the resource old table.
75 if (static::$resourceoldexists === null) {
76 static::$resourceoldexists = $DB->record_exists('resource_old', array());
77 }
78
79 // If there are links to items in the resource_old table, rewrite them to be links to the correct URL
80 // for their new module.
81 if (static::$resourceoldexists) {
82 // Match all of the resources.
83 $result = preg_match_all($search, $content, $matches, PREG_PATTERN_ORDER);
84
85 // Course module ID resource links.
86 if ($result) {
87 list($insql, $params) = $DB->get_in_or_equal($matches[2]);
88 $oldrecs = $DB->get_records_select('resource_old', "cmid $insql", $params, '', 'cmid, newmodule');
89
90 for ($i = 0; $i < count($matches[0]); $i++) {
91 $cmid = $matches[2][$i];
92 if (isset($oldrecs[$cmid])) {
93 // Resource_old item, rewrite it
94 $replace = '$@' . strtoupper($oldrecs[$cmid]->newmodule) . 'VIEWBYID*' . $cmid . '@$';
95 } else {
96 // Not in the resource old table, don't rewrite
97 $replace = '$@RESOURCEVIEWBYID*'.$cmid.'@$';
98 }
99 $content = str_replace($matches[0][$i], $replace, $content);
100 }
101 }
102
103 $matches = null;
104 $result = preg_match_all($search2, $content, $matches, PREG_PATTERN_ORDER);
105
106 // No resource links.
107 if (!$result) {
108 return $content;
109 }
110 // Resource ID links.
111 list($insql, $params) = $DB->get_in_or_equal($matches[2]);
112 $oldrecs = $DB->get_records_select('resource_old', "oldid $insql", $params, '', 'oldid, cmid, newmodule');
a345de6e 113
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114 for ($i = 0; $i < count($matches[0]); $i++) {
115 $recordid = $matches[2][$i];
116 if (isset($oldrecs[$recordid])) {
117 // Resource_old item, rewrite it
118 $replace = '$@' . strtoupper($oldrecs[$recordid]->newmodule) . 'VIEWBYID*' . $oldrecs[$recordid]->cmid . '@$';
119 $content = str_replace($matches[0][$i], $replace, $content);
120 }
121 }
122 } else {
123 $content = preg_replace($search, '$@RESOURCEVIEWBYID*$2@$', $content);
124 }
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125 return $content;
126 }
127}