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
  29     $manifest_file = $dir . DIRECTORY_SEPARATOR . 'imsmanifest.xml';
  30     $moodle_file = $dir . DIRECTORY_SEPARATOR . 'moodle.xml';
  31     $schema_file = 'cc' . DIRECTORY_SEPARATOR . '' . DIRECTORY_SEPARATOR . 'schemas' . DIRECTORY_SEPARATOR . 'cclibxml2validator.xsd';
  32
  33     if (is_readable($manifest_file) && !is_readable($moodle_file)) {
  34
  35         $is_cc = detect_cc_format($manifest_file);
  36
  37         if ($is_cc) {
  38
  39             $detected_requirements = detect_requirements();
  40
  41             if (!$detected_requirements["php5"]) {
  42                 notify(get_string('cc_import_req_php5', 'imscc'));
  43                 return false;
  44             }
  45
  46             if (!$detected_requirements["dom"]) {
  47                 notify(get_string('cc_import_req_dom', 'imscc'));
  48                 return false;
  49             }
  50
  51             if (!$detected_requirements["libxml"]) {
  52                 notify(get_string('cc_import_req_libxml', 'imscc'));
  53                 return false;
  54             }
  55
  56             if (!$detected_requirements["libxmlminversion"]) {
  57                 notify(get_string('cc_import_req_libxmlminversion', 'imscc'));
  58                 return false;
  59             }
  60             if (!$detected_requirements["xsl"]) {
  61                 notify(get_string('cc_import_req_xsl', 'imscc'));
  62                 return false;
  63             }
  64
  65             echo get_string('cc2moodle_checking_schema', 'imscc') . '<br />';
  66
  67             $cc_manifest = new DOMDocument();
  68
  69             if ($cc_manifest->load($manifest_file)) {
  70                 if ($cc_manifest->schemaValidate($schema_file)) {
  71
  72                     echo get_string('cc2moodle_valid_schema', 'imscc') . '<br />';
  73
  74                     $cc2moodle = new cc2moodle($manifest_file);
  75
  76                     if (!$cc2moodle->is_auth()) {
  77                         return $cc2moodle->generate_moodle_xml();
  78                     } else {
  79                         notify(get_string('cc2moodle_req_auth', 'imscc'));
  80                         return false;
  81                     }
  82
  83                 } else {
  84                     notify(get_string('cc2moodle_invalid_schema', 'imscc'));
  85                     return false;
  86                 }
  87
  88             } else {
  89                 notify(get_string('cc2moodle_manifest_dont_load', 'imscc'));
  90                 return false;
  91             }
  92         }
  93     }
  94
  95     return true;
  96 }
  97
  98 function detect_requirements () {
  99
 100     if (floor(phpversion()) >= 5) {
 101         $detected["php5"] = true;
 102     } else {
 103         $detected["php5"] = false;
 104     }
 105
 106     $detected["xsl"] = extension_loaded('xsl');
 107     $detected['dom'] = extension_loaded('dom');
 108     $detected['libxml'] = extension_loaded('libxml');
 109     $detected['libxmlminversion'] = extension_loaded('libxml') && version_compare(LIBXML_DOTTED_VERSION, '2.6.30', '>=');
 110
 111     return $detected;
 112
 113 }
 114
 115 function detect_cc_format ($xml_file) {
 116
 117     $inpos = 0;
 118     $xml_snippet = file_get_contents($xml_file, 0, NULL, 0, 500);
 119
 120     if (!empty($xml_snippet)) {
 121
 122         $xml_snippet = strtolower($xml_snippet);
 123         $xml_snippet = preg_replace('/\s*/m', '', $xml_snippet);
 124         $xml_snippet = str_replace("'", '', $xml_snippet);
 125         $xml_snippet = str_replace('"', '', $xml_snippet);
 126
 127         $search_string = "xmlns=" . NS_COMMON_CARTRIDGE;
 128
 129         $inpos = strpos($xml_snippet, $search_string);
 130
 131         if ($inpos) {
 132             return true;
 133         } else {
 134             return false;
 135         }
 136
 137     } else {
 138         return false;
 139     }
 140
 141 }