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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  require_once($CFG->dirroot.'/grade/export/lib.php');
  19  require_once($CFG->libdir.'/filelib.php');
  20  
  21  class grade_export_xml extends grade_export {
  22  
  23      public $plugin = 'xml';
  24      public $updatedgradesonly = false; // default to export ALL grades
  25  
  26      /**
  27       * To be implemented by child classes
  28       * @param boolean $feedback
  29       * @param boolean $publish Whether to output directly, or send as a file
  30       * @return string
  31       */
  32      public function print_grades($feedback = false) {
  33          global $CFG;
  34          require_once($CFG->libdir.'/filelib.php');
  35  
  36          $export_tracking = $this->track_exports();
  37  
  38          $strgrades = get_string('grades');
  39  
  40          /// Calculate file name
  41          $shortname = format_string($this->course->shortname, true, array('context' => context_course::instance($this->course->id)));
  42          $downloadfilename = clean_filename("$shortname $strgrades.xml");
  43  
  44          make_temp_directory('gradeexport');
  45          $tempfilename = $CFG->tempdir .'/gradeexport/'. md5(sesskey().microtime().$downloadfilename);
  46          if (!$handle = fopen($tempfilename, 'w+b')) {
  47              print_error('cannotcreatetempdir');
  48          }
  49  
  50          /// time stamp to ensure uniqueness of batch export
  51          fwrite($handle,  '<results batch="xml_export_'.time().'">'."\n");
  52  
  53          $export_buffer = array();
  54  
  55          $geub = new grade_export_update_buffer();
  56          $gui = new graded_users_iterator($this->course, $this->columns, $this->groupid);
  57          $gui->require_active_enrolment($this->onlyactive);
  58          $gui->init();
  59          while ($userdata = $gui->next_user()) {
  60              $user = $userdata->user;
  61  
  62              if (empty($user->idnumber)) {
  63                  //id number must exist otherwise we cant match up students when importing
  64                  continue;
  65              }
  66  
  67              // studentgrades[] index should match with corresponding $index
  68              foreach ($userdata->grades as $itemid => $grade) {
  69                  $grade_item = $this->grade_items[$itemid];
  70                  $grade->grade_item =& $grade_item;
  71                  $gradestr = $this->format_grade($grade, $this->displaytype); // no formating for now
  72  
  73                  // MDL-11669, skip exported grades or bad grades (if setting says so)
  74                  if ($export_tracking) {
  75                      $status = $geub->track($grade);
  76                      if ($this->updatedgradesonly && ($status == 'nochange' || $status == 'unknown')) {
  77                          continue;
  78                      }
  79                  }
  80  
  81                  fwrite($handle,  "\t<result>\n");
  82  
  83                  if ($export_tracking) {
  84                      fwrite($handle,  "\t\t<state>$status</state>\n");
  85                  }
  86  
  87                  // only need id number
  88                  fwrite($handle,  "\t\t<assignment>{$grade_item->idnumber}</assignment>\n");
  89                  // this column should be customizable to use either student id, idnumber, uesrname or email.
  90                  fwrite($handle,  "\t\t<student>{$user->idnumber}</student>\n");
  91                  fwrite($handle,  "\t\t<score>$gradestr</score>\n");
  92                  if ($this->export_feedback) {
  93                      $feedbackstr = $this->format_feedback($userdata->feedbacks[$itemid]);
  94                      fwrite($handle,  "\t\t<feedback>$feedbackstr</feedback>\n");
  95                  }
  96                  fwrite($handle,  "\t</result>\n");
  97              }
  98          }
  99          fwrite($handle,  "</results>");
 100          fclose($handle);
 101          $gui->close();
 102          $geub->close();
 103  
 104          if (defined('BEHAT_SITE_RUNNING')) {
 105              // If behat is running, we cannot test the output if we force a file download.
 106              include($tempfilename);
 107          } else {
 108              @header("Content-type: text/xml; charset=UTF-8");
 109              send_temp_file($tempfilename, $downloadfilename, false);
 110          }
 111      }
 112  }
 113  
 114