backup/cc/entity.resource.class.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  * @copyright 2011 Darko Miletic (dmiletic@moodlerooms.com)
  21  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22  */
  23
  24 defined('MOODLE_INTERNAL') or die('Direct access to this script is forbidden.');
  25
  26 class cc_resource extends entities {
  27
  28     public function generate_node () {
  29
  30         cc2moodle::log_action('Creating Resource mods');
  31
  32         $response = '';
  33         $sheet_mod_resource = cc2moodle::loadsheet(SHEET_COURSE_SECTIONS_SECTION_MODS_MOD_RESOURCE);
  34
  35         if (!empty(cc2moodle::$instances['instances'][MOODLE_TYPE_RESOURCE])) {
  36             foreach (cc2moodle::$instances['instances'][MOODLE_TYPE_RESOURCE] as $instance) {
  37                 $response .= $this->create_node_course_modules_mod_resource($sheet_mod_resource, $instance);
  38             }
  39         }
  40
  41         return $response;
  42
  43     }
  44
  45     private function create_node_course_modules_mod_resource ($sheet_mod_resource, $instance) {
  46         global $CFG;
  47
  48         require_once($CFG->libdir.'/validateurlsyntax.php');
  49
  50         $link = '';
  51         $mod_alltext = '';
  52         $mod_summary = '';
  53         $xpath = cc2moodle::newx_path(cc2moodle::$manifest, cc2moodle::$namespaces);
  54
  55         if ($instance['common_cartriedge_type'] == cc2moodle::CC_TYPE_WEBCONTENT || $instance['common_cartriedge_type'] == cc2moodle::CC_TYPE_ASSOCIATED_CONTENT) {
  56             $resource = $xpath->query('/imscc:manifest/imscc:resources/imscc:resource[@identifier="' . $instance['resource_indentifier'] . '"]/@href');
  57             $resource = !empty($resource->item(0)->nodeValue) ? $resource->item(0)->nodeValue : '';
  58
  59             if (empty($resource)) {
  60
  61                 unset($resource);
  62
  63                 $resource = $xpath->query('/imscc:manifest/imscc:resources/imscc:resource[@identifier="' . $instance['resource_indentifier'] . '"]/imscc:file/@href');
  64                 $resource = !empty($resource->item(0)->nodeValue) ? $resource->item(0)->nodeValue : '';
  65
  66             }
  67
  68             if (!empty($resource)) {
  69                 $link = $resource;
  70             }
  71         }
  72
  73         if ($instance['common_cartriedge_type'] == cc2moodle::CC_TYPE_WEBLINK) {
  74
  75             $external_resource = $xpath->query('/imscc:manifest/imscc:resources/imscc:resource[@identifier="' . $instance['resource_indentifier'] . '"]/imscc:file/@href')->item(0)->nodeValue;
  76
  77             if ($external_resource) {
  78
  79                 $resource = $this->load_xml_resource(cc2moodle::$path_to_manifest_folder . DIRECTORY_SEPARATOR . $external_resource);
  80
  81                 if (!empty($resource)) {
  82                     $xpath = cc2moodle::newx_path($resource, cc2moodle::getresourcens());
  83                     $resource = $xpath->query('//url/@href');
  84                     if ($resource->length > 0) {
  85                         $rawlink = $resource->item(0)->nodeValue;
  86                         if (!validateUrlSyntax($rawlink, 's+')) {
  87                             $changed = rawurldecode($rawlink);
  88                             if (validateUrlSyntax($changed, 's+')) {
  89                                 $link = $changed;
  90                             } else {
  91                                 $link = 'http://invalidurldetected/';
  92                             }
  93                         } else {
  94                             $link = $rawlink;
  95                         }
  96                     }
  97                 }
  98             }
  99         }
 100
 101         $find_tags = array('[#mod_instance#]',
 102                            '[#mod_name#]',
 103                            '[#mod_type#]',
 104                            '[#mod_reference#]',
 105                            '[#mod_summary#]',
 106                            '[#mod_alltext#]',
 107                            '[#mod_options#]',
 108                            '[#date_now#]');
 109
 110         $mod_type      = 'file';
 111         $mod_options   = 'objectframe';
 112         $mod_reference = $link;
 113         //detected if we are dealing with html file
 114         if (!empty($link) && ($instance['common_cartriedge_type'] == cc2moodle::CC_TYPE_WEBCONTENT)) {
 115             $ext = strtolower(pathinfo($link, PATHINFO_EXTENSION));
 116             if (in_array($ext, array('html', 'htm', 'xhtml'))) {
 117                 $mod_type = 'html';
 118                 //extract the content of the file
 119                 $rootpath = realpath(cc112moodle::$path_to_manifest_folder);
 120                 $htmlpath = realpath($rootpath . DIRECTORY_SEPARATOR . $link);
 121                 $dirpath  = dirname($htmlpath);
 122                 if (file_exists($htmlpath)) {
 123                     $fcontent = file_get_contents($htmlpath);
 124                     $mod_alltext = clean_param($this->prepare_content($fcontent), PARAM_CLEANHTML);
 125                     $mod_reference = '';
 126                     $mod_options = '';
 127                     //TODO: try to handle embedded resources
 128                     /**
 129                     * images, linked static resources, applets, videos
 130                     */
 131                     $doc = new DOMDocument();
 132                     $cdir = getcwd();
 133                     chdir($dirpath);
 134                     try {
 135                         if (!empty($mod_alltext) && $doc->loadHTML($mod_alltext)) {
 136                             $xpath = new DOMXPath($doc);
 137                             $attributes = array('href', 'src', 'background', 'archive', 'code');
 138                             $qtemplate = "//*[@##][not(contains(@##,'://'))]/@##";
 139                             $query = '';
 140                             foreach ($attributes as $attrname) {
 141                                 if (!empty($query)) {
 142                                     $query .= " | ";
 143                                 }
 144                                 $query .= str_replace('##', $attrname, $qtemplate);
 145                             }
 146                             $list = $xpath->query($query);
 147                             $searches = array();
 148                             $replaces = array();
 149                             foreach ($list as $resrc) {
 150                                 $rpath = $resrc->nodeValue;
 151                                 $rtp = realpath($rpath);
 152                                 if (($rtp !== false) && is_file($rtp)) {
 153                                     //file is there - we are in business
 154                                     $strip = str_replace("\\", "/", str_ireplace($rootpath, '', $rtp));
 155                                     $encoded_file = '$@FILEPHP@$'.str_replace('/', '$@SLASH@$', $strip);
 156                                     $searches[] = $resrc->nodeValue;
 157                                     $replaces[] = $encoded_file;
 158                                 }
 159                             }
 160                             $mod_alltext = str_replace($searches, $replaces, $mod_alltext);
 161                         }
 162                     } catch (Exception $e) {
 163                         //silence the complaints
 164                     }
 165                     chdir($cdir);
 166                     $mod_alltext = self::safexml($mod_alltext);
 167                 }
 168             }
 169         }
 170
 171         $replace_values = array($instance['instance'],
 172                                 self::safexml($instance['title']),
 173                                 $mod_type,
 174                                 $mod_reference,
 175                                 '',
 176                                 $mod_alltext,
 177                                 $mod_options,
 178                                 time());
 179
 180
 181         return str_replace($find_tags, $replace_values, $sheet_mod_resource);
 182     }
 183 }