backup/cc/restore_cc.php

   1 <?php
   2 // This file is part of Moodle - http://moodle.org/
   3 //
   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.
   8 //
   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.
  13 //
  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/>.
  16 /**
  17  * @package   moodlecore
  18  * @subpackage backup-imscc
  19  * @copyright 2009 Mauro Rondinelli (mauro.rondinelli [AT] uvcms.com)
  20  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  21  */
  22 defined('MOODLE_INTERNAL') or die('Direct access to this script is forbidden.');
  23
  24 require_once($CFG->dirroot . '/backup/cc/includes/constants.php');
  25 require_once($CFG->dirroot . '/backup/cc/cc2moodle.php');
  26
  27 function cc_convert ($dir) {
  28     global $OUTPUT;
  29
  30     $manifest_file = $dir . DIRECTORY_SEPARATOR . 'imsmanifest.xml';
  31     $moodle_file = $dir . DIRECTORY_SEPARATOR . 'moodle.xml';
  32     $schema_file = 'cc' . DIRECTORY_SEPARATOR . '' . DIRECTORY_SEPARATOR . 'schemas' . DIRECTORY_SEPARATOR . 'cclibxml2validator.xsd';
  33
  34     if (is_readable($manifest_file) && !is_readable($moodle_file)) {
  35
  36         $is_cc = detect_cc_format($manifest_file);
  37
  38         if ($is_cc) {
  39
  40             $detected_requirements = detect_requirements();
  41
  42             if (!$detected_requirements["php5"]) {
  43                 echo $OUTPUT->notification(get_string('cc_import_req_php5', 'imscc'));
  44                 return false;
  45             }
  46
  47             if (!$detected_requirements["dom"]) {
  48                 echo $OUTPUT->notification(get_string('cc_import_req_dom', 'imscc'));
  49                 return false;
  50             }
  51
  52             if (!$detected_requirements["libxml"]) {
  53                 echo $OUTPUT->notification(get_string('cc_import_req_libxml', 'imscc'));
  54                 return false;
  55             }
  56
  57             if (!$detected_requirements["libxmlminversion"]) {
  58                 echo $OUTPUT->notification(get_string('cc_import_req_libxmlminversion', 'imscc'));
  59                 return false;
  60             }
  61             if (!$detected_requirements["xsl"]) {
  62                 echo $OUTPUT->notification(get_string('cc_import_req_xsl', 'imscc'));
  63                 return false;
  64             }
  65
  66             echo get_string('cc2moodle_checking_schema', 'imscc') . '<br />';
  67
  68             $cc_manifest = new DOMDocument();
  69
  70             if ($cc_manifest->load($manifest_file)) {
  71                 if ($cc_manifest->schemaValidate($schema_file)) {
  72
  73                     echo get_string('cc2moodle_valid_schema', 'imscc') . '<br />';
  74
  75                     $cc2moodle = new cc2moodle($manifest_file);
  76
  77                     if (!$cc2moodle->is_auth()) {
  78                         return $cc2moodle->generate_moodle_xml();
  79                     } else {
  80                         echo $OUTPUT->notification(get_string('cc2moodle_req_auth', 'imscc'));
  81                         return false;
  82                     }
  83
  84                 } else {
  85                     echo $OUTPUT->notification(get_string('cc2moodle_invalid_schema', 'imscc'));
  86                     return false;
  87                 }
  88
  89             } else {
  90                 echo $OUTPUT->notification(get_string('cc2moodle_manifest_dont_load', 'imscc'));
  91                 return false;
  92             }
  93         }
  94     }
  95
  96     return true;
  97 }
  98
  99 function detect_requirements () {
 100
 101     if (floor(phpversion()) >= 5) {
 102         $detected["php5"] = true;
 103     } else {
 104         $detected["php5"] = false;
 105     }
 106
 107     $detected["xsl"] = extension_loaded('xsl');
 108     $detected['dom'] = extension_loaded('dom');
 109     $detected['libxml'] = extension_loaded('libxml');
 110     $detected['libxmlminversion'] = extension_loaded('libxml') && version_compare(LIBXML_DOTTED_VERSION, '2.6.30', '>=');
 111
 112     return $detected;
 113
 114 }
 115
 116 function detect_cc_format ($xml_file) {
 117
 118     $inpos = 0;
 119     $xml_snippet = file_get_contents($xml_file, 0, NULL, 0, 500);
 120
 121     if (!empty($xml_snippet)) {
 122
 123         $xml_snippet = strtolower($xml_snippet);
 124         $xml_snippet = preg_replace('/\s*/m', '', $xml_snippet);
 125         $xml_snippet = str_replace("'", '', $xml_snippet);
 126         $xml_snippet = str_replace('"', '', $xml_snippet);
 127
 128         $search_string = "xmlns=" . NS_COMMON_CARTRIDGE;
 129
 130         $inpos = strpos($xml_snippet, $search_string);
 131
 132         if ($inpos) {
 133             return true;
 134         } else {
 135             return false;
 136         }
 137
 138     } else {
 139         return false;
 140     }
 141
 142 }