tools/tests/question_import.php

   1 <?php
   2 /************************************************************************/
   3 /* ATutor                                                                                                                               */
   4 /************************************************************************/
   5 /* Copyright (c) 2002-2008 by Greg Gay, Harris Wong                                             */
   6 /* Adaptive Technology Resource Centre / University of Toronto                  */
   7 /* http://atutor.ca                                                                                                             */
   8 /*                                                                                                                                              */
   9 /* This program is free software. You can redistribute it and/or                */
  10 /* modify it under the terms of the GNU General Public License                  */
  11 /* as published by the Free Software Foundation.                                                */
  12 /************************************************************************/
  13 // $Id$
  14
  15 define('AT_INCLUDE_PATH', '../../include/');
  16 require(AT_INCLUDE_PATH.'vitals.inc.php');
  17 require(AT_INCLUDE_PATH.'lib/filemanager.inc.php'); /* for clr_dir() and preImportCallBack and dirsize() */
  18 require(AT_INCLUDE_PATH.'lib/qti.inc.php');
  19 require(AT_INCLUDE_PATH.'classes/pclzip.lib.php');
  20 //require(AT_INCLUDE_PATH.'classes/QTI/QTIParser.class.php');
  21 require(AT_INCLUDE_PATH.'classes/QTI/QTIImport.class.php');
  22
  23 /* to avoid timing out on large files */
  24 @set_time_limit(0);
  25 $_SESSION['done'] = 1;
  26
  27 $element_path = array();
  28 $character_data = '';
  29 $resource_num = 0;
  30 $overwrite = false;
  31
  32 /* handle get */
  33 if (isset($_POST['submit_yes'])){
  34         $overwrite = true;
  35 } elseif (isset($_POST['submit_no'])){
  36         $msg->addFeedback('IMPORT_CANCELLED');
  37         header('Location: question_db.php');
  38         exit;
  39 }
  40
  41 /* functions */
  42 /* called at the start of en element */
  43 /* builds the $path array which is the path from the root to the current element */
  44 function startElement($parser, $name, $attrs) {
  45         global $attributes, $element_path, $resource_num;
  46         //save attributes.
  47         switch($name) {
  48                 case 'resource':
  49                         $attributes[$name.$resource_num]['identifier'] = $attrs['identifier'];
  50                         $attributes[$name.$resource_num]['href'] = $attrs['href'];
  51                         $attributes[$name.$resource_num]['type'] = $attrs['type'];
  52                         $resource_num++;
  53                         break;
  54                 case 'file':
  55                         if(in_array('resource', $element_path)){
  56                                 $attributes['resource'.($resource_num-1)]['file'][] = $attrs['href'];
  57                         }
  58                         break;
  59                 case 'dependency':
  60                         if(in_array('resource', $element_path)){
  61                                 $attributes['resource'.($resource_num-1)]['dependency'][] = $attrs['identifierref'];
  62                         }
  63                         break;
  64
  65         }
  66         array_push($element_path, $name);
  67 }
  68
  69 /* called when an element ends */
  70 /* removed the current element from the $path */
  71 function endElement($parser, $name) {
  72         global $element_path;
  73         array_pop($element_path);
  74 }
  75
  76 /* called when there is character data within elements */
  77 /* constructs the $items array using the last entry in $path as the parent element */
  78 function characterData($parser, $data){
  79         global $character_data;
  80         if (trim($data)!=''){
  81                 $character_data .= preg_replace('/[\t\0\x0B]*/', '', $data);
  82         }
  83 }
  84
  85 //If overwrite hasn't been set to true, then the file has not been exported and still in the cache.
  86 //otherwise, the zip file is extracted but has not been deleted (due to the confirmation).
  87 if (!$overwrite){
  88         if (!isset($_POST['submit_import'])) {
  89                 /* just a catch all */
  90
  91                 $errors = array('FILE_MAX_SIZE', ini_get('post_max_size'));
  92                 $msg->addError($errors);
  93
  94                 header('Location: ./question_db.php');
  95                 exit;
  96         }
  97
  98
  99         //Handles import
 100         /*
 101         if (isset($_POST['url']) && ($_POST['url'] != 'http://') ) {
 102                 if ($content = @file_get_contents($_POST['url'])) {
 103
 104                         // save file to /content/
 105                         $filename = substr(time(), -6). '.zip';
 106                         $full_filename = AT_CONTENT_DIR . $filename;
 107
 108                         if (!$fp = fopen($full_filename, 'w+b')) {
 109                                 echo "Cannot open file ($filename)";
 110                                 exit;
 111                         }
 112
 113                         if (fwrite($fp, $content, strlen($content) ) === FALSE) {
 114                                 echo "Cannot write to file ($filename)";
 115                                 exit;
 116                         }
 117                         fclose($fp);
 118                 }
 119                 $_FILES['file']['name']     = $filename;
 120                 $_FILES['file']['tmp_name'] = $full_filename;
 121                 $_FILES['file']['size']     = strlen($content);
 122                 unset($content);
 123                 $url_parts = pathinfo($_POST['url']);
 124                 $package_base_name_url = $url_parts['basename'];
 125         }
 126         */
 127         $ext = pathinfo($_FILES['file']['name']);
 128         $ext = $ext['extension'];
 129
 130         if ($ext != 'zip') {
 131                 $msg->addError('IMPORTDIR_IMS_NOTVALID');
 132         } else if ($_FILES['file']['error'] == 1) {
 133                 $errors = array('FILE_MAX_SIZE', ini_get('upload_max_filesize'));
 134                 $msg->addError($errors);
 135         } else if ( !$_FILES['file']['name'] || (!is_uploaded_file($_FILES['file']['tmp_name']) && !$_POST['url'])) {
 136                 $msg->addError('FILE_NOT_SELECTED');
 137         } else if ($_FILES['file']['size'] == 0) {
 138                 $msg->addError('IMPORTFILE_EMPTY');
 139         }
 140 }
 141
 142 if ($msg->containsErrors()) {
 143         if (isset($_GET['tile'])) {
 144                 header('Location: '.$_base_path.'tools/tile/index.php');
 145         } else {
 146                 header('Location: question_db.php');
 147         }
 148         exit;
 149 }
 150
 151 /* check if ../content/import/ exists */
 152 $import_path = AT_CONTENT_DIR . 'import/';
 153 $content_path = AT_CONTENT_DIR;
 154
 155 if (!is_dir($import_path)) {
 156         if (!@mkdir($import_path, 0700)) {
 157                 $msg->addError('IMPORTDIR_FAILED');
 158         }
 159 }
 160
 161 $import_path .= $_SESSION['course_id'].'/';
 162 if (!$overwrite){
 163         if (is_dir($import_path)) {
 164                 clr_dir($import_path);
 165         }
 166
 167         if (!@mkdir($import_path, 0700)) {
 168                 $msg->addError('IMPORTDIR_FAILED');
 169         }
 170
 171         /* extract the entire archive into AT_COURSE_CONTENT . import/$course using the call back function to filter out php files */
 172         error_reporting(0);
 173         $archive = new PclZip($_FILES['file']['tmp_name']);
 174         if ($archive->extract(  PCLZIP_OPT_PATH,        $import_path,
 175                                                         PCLZIP_CB_PRE_EXTRACT,  'preImportCallBack') == 0) {
 176                 $msg->addError('IMPORT_FAILED');
 177                 echo 'Error : '.$archive->errorInfo(true);
 178                 clr_dir($import_path);
 179                 header('Location: questin_db.php');
 180                 exit;
 181         }
 182         error_reporting(AT_ERROR_REPORTING);
 183 }
 184
 185 /* get the course's max_quota */
 186 $sql    = "SELECT max_quota FROM ".TABLE_PREFIX."courses WHERE course_id=$_SESSION[course_id]";
 187 $result = mysql_query($sql, $db);
 188 $q_row  = mysql_fetch_assoc($result);
 189
 190 if ($q_row['max_quota'] != AT_COURSESIZE_UNLIMITED) {
 191
 192         if ($q_row['max_quota'] == AT_COURSESIZE_DEFAULT) {
 193                 $q_row['max_quota'] = $MaxCourseSize;
 194         }
 195         $totalBytes   = dirsize($import_path);
 196         $course_total = dirsize(AT_CONTENT_DIR . $_SESSION['course_id'].'/');
 197         $total_after  = $q_row['max_quota'] - $course_total - $totalBytes + $MaxCourseFloat;
 198
 199         if ($total_after < 0) {
 200                 /* remove the content dir, since there's no space for it */
 201                 $errors = array('NO_CONTENT_SPACE', number_format(-1*($total_after/AT_KBYTE_SIZE), 2 ) );
 202                 $msg->addError($errors);
 203
 204                 clr_dir($import_path);
 205
 206                 if (isset($_GET['tile'])) {
 207                         header('Location: '.$_base_path.'tools/tile/index.php');
 208                 } else {
 209                         header('Location: question_db.php');
 210                 }
 211                 exit;
 212         }
 213 }
 214
 215 $ims_manifest_xml = @file_get_contents($import_path.'imsmanifest.xml');
 216
 217 if ($ims_manifest_xml === false) {
 218         $msg->addError('NO_IMSMANIFEST');
 219
 220         if (file_exists($import_path . 'atutor_backup_version')) {
 221                 $msg->addError('NO_IMS_BACKUP');
 222         }
 223
 224         clr_dir($import_path);
 225
 226         if (isset($_GET['tile'])) {
 227                 header('Location: '.$_base_path.'tools/tile/index.php');
 228         } else {
 229                 header('Location: question_db.php');
 230         }
 231         exit;
 232 }
 233
 234 $xml_parser = xml_parser_create();
 235
 236 xml_parser_set_option($xml_parser, XML_OPTION_CASE_FOLDING, false); /* conform to W3C specs */
 237 xml_set_element_handler($xml_parser, 'startElement', 'endElement');
 238 xml_set_character_data_handler($xml_parser, 'characterData');
 239
 240 if (!xml_parse($xml_parser, $ims_manifest_xml, true)) {
 241         die(sprintf("XML error: %s at line %d",
 242                                 xml_error_string(xml_get_error_code($xml_parser)),
 243                                 xml_get_current_line_number($xml_parser)));
 244 }
 245
 246 xml_parser_free($xml_parser);
 247
 248 //assign folder names
 249 //if (!$package_base_name){
 250 //      $package_base_name = substr($_FILES['file']['name'], 0, -4);
 251 //}
 252
 253 //$package_base_name = strtolower($package_base_name);
 254 //$package_base_name = str_replace(array('\'', '"', ' ', '|', '\\', '/', '<', '>', ':'), '_' , $package_base_name);
 255 //$package_base_name = preg_replace("/[^A-Za-z0-9._\-]/", '', $package_base_name);
 256
 257 //if (is_dir(AT_CONTENT_DIR . $_SESSION['course_id'].'/'.$package_base_name)) {
 258 //      echo 'Already exist: Quitting.  (Need better msg here)';
 259 //      exit;
 260 //      $package_base_name .= '_'.date('ymdHis');
 261 //}
 262
 263 if ($package_base_path) {
 264         $package_base_path = implode('/', $package_base_path);
 265 }
 266
 267 //Dependency handling
 268 //$media_items = array();
 269 $xml_items = array();
 270 //foreach($attributes as $resource=>$attrs){
 271 //      if ($attrs['type'] != 'webcontent'){
 272 //              $media_items[$attrs['identifier']] = $attrs['file'];
 273 //      }
 274 //}
 275
 276 //Check if the files exist, if so, warn the user.
 277 $existing_files = isQTIFileExist($attributes);
 278 //debug($existing_files);
 279 if (!$overwrite && !empty($existing_files)){
 280         $existing_files = implode('<br/>', $existing_files);
 281         require(AT_INCLUDE_PATH.'header.inc.php');
 282 //      $msg->addConfirm(array('MEDIA_FILE_EXISTED', $existing_files));
 283 //      $msg->printConfirm();
 284         echo '<form action="" method="POST">';
 285         echo '<div class="input-form">';
 286         echo '<div class="row">';
 287         $msg->printInfos(array('MEDIA_FILE_EXISTED', $existing_files));
 288         echo '</div>';
 289         echo '<div class="row buttons">';
 290         echo '<input type="submit" class="" name="submit_yes" value="'._AT('yes').'"/>';
 291         echo '<input type="submit" class="" name="submit_no" value="'._AT('no').'"/>';
 292         echo '<input type="hidden" name="submit_import" value="submit_import" />';
 293         ECHO '<input type="hidden" name="url" value="'.$_POST['url'].'" />';
 294         echo '</div></div>';
 295         echo '</form>';
 296         require (AT_INCLUDE_PATH.'footer.inc.php');
 297
 298         exit;
 299 }
 300
 301
 302 //Get the XML file out and start importing them into our database.
 303 //TODO: import_test.php shares approx. the same code as below, just that import_test.php has
 304 //              an extra line of code that uses a stack to remember the question #.  Might want to
 305 //              create a function for this.
 306 $qti_import = new QTIImport($import_path);
 307 $qti_import->importQuestions($attributes);
 308
 309 //debug('done');
 310 clr_dir(AT_CONTENT_DIR . 'import/'.$_SESSION['course_id']);
 311 if (!$msg->containsErrors()) {
 312         $msg->addFeedback('IMPORT_SUCCEEDED');
 313 }
 314
 315 header('Location: question_db.php');
 316 exit;
 317 ?>