grade/export/xml/grade_export_xml.php

   1 <?php
   2 ///////////////////////////////////////////////////////////////////////////
   3 //                                                                       //
   4 // NOTICE OF COPYRIGHT                                                   //
   5 //                                                                       //
   6 // Moodle - Modular Object-Oriented Dynamic Learning Environment         //
   7 //          http://moodle.com                                            //
   8 //                                                                       //
   9 // Copyright (C) 1999 onwards  Martin Dougiamas  http://moodle.com       //
  10 //                                                                       //
  11 // This program is free software; you can redistribute it and/or modify  //
  12 // it under the terms of the GNU General Public License as published by  //
  13 // the Free Software Foundation; either version 2 of the License, or     //
  14 // (at your option) any later version.                                   //
  15 //                                                                       //
  16 // This program is distributed in the hope that it will be useful,       //
  17 // but WITHOUT ANY WARRANTY; without even the implied warranty of        //
  18 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         //
  19 // GNU General Public License for more details:                          //
  20 //                                                                       //
  21 //          http://www.gnu.org/copyleft/gpl.html                         //
  22 //                                                                       //
  23 ///////////////////////////////////////////////////////////////////////////
  24
  25 require_once($CFG->dirroot.'/grade/export/lib.php');
  26
  27 class grade_export_xml extends grade_export {
  28
  29     var $plugin = 'xml';
  30
  31     /**
  32      * To be implemented by child classes
  33      * @param boolean $feedback
  34      * @param boolean $publish Whether to output directly, or send as a file
  35      * @return string
  36      */
  37     function print_grades($feedback = false) {
  38         global $CFG;
  39         require_once($CFG->libdir.'/filelib.php');
  40
  41         $export_tracking = $this->track_exports();
  42
  43         $strgrades = get_string('grades', 'grade');
  44
  45         /// Calculate file name
  46         $downloadfilename = clean_filename("{$this->course->shortname} $strgrades.xml");
  47
  48         make_upload_directory('temp/gradeexport', false);
  49         $tempfilename = $CFG->dataroot .'/temp/gradeexport/'. md5(sesskey().microtime().$downloadfilename);
  50         if (!$handle = fopen($tempfilename, 'w+b')) {
  51             error("Could not create a temporary file into which to dump the XML data.");
  52             return false;
  53         }
  54
  55         /// time stamp to ensure uniqueness of batch export
  56         fwrite($handle,  '<results batch="xml_export_'.time().'">'."\n");
  57
  58         $export_buffer = array();
  59
  60         $geub = new grade_export_update_buffer();
  61         $gui = new graded_users_iterator($this->course, $this->columns, $this->groupid);
  62         $gui->init();
  63         while ($userdata = $gui->next_user()) {
  64             $user = $userdata->user;
  65
  66             // studentgrades[] index should match with corresponding $index
  67             foreach ($userdata->grades as $itemid => $grade) {
  68                 $grade_item = $this->grade_items[$itemid];
  69                 $grade->grade_item =& $grade_item;
  70                 $gradestr = $grade->finalgrade; // no formating for now
  71
  72                 fwrite($handle,  "\t<result>\n");
  73
  74                 if ($export_tracking) {
  75                     $status = $geub->track($grade);
  76                     fwrite($handle,  "\t\t<state>$status</state>\n");
  77                 }
  78
  79                 // only need id number
  80                 fwrite($handle,  "\t\t<assignment>{$grade_item->idnumber}</assignment>\n");
  81                 // this column should be customizable to use either student id, idnumber, uesrname or email.
  82                 fwrite($handle,  "\t\t<student>{$user->id}</student>\n");
  83                 fwrite($handle,  "\t\t<score>$gradestr</score>\n");
  84                 if ($this->export_feedback) {
  85                     $feedbackstr = $this->format_feedback($userdata->feedbacks[$itemid]);
  86                     fwrite($handle,  "\t\t<feedback>$feedbackstr</feedback>\n");
  87                 }
  88                 fwrite($handle,  "\t</result>\n");
  89             }
  90         }
  91         fwrite($handle,  "</results>");
  92         fclose($handle);
  93         $gui->close();
  94         $geub->close();
  95
  96         @header('Cache-Control: private, must-revalidate, pre-check=0, post-check=0, max-age=0');
  97         @header('Expires: '. gmdate('D, d M Y H:i:s', 0) .' GMT');
  98         @header('Pragma: no-cache');
  99         header("Content-type: text/xml; charset=UTF-8");
 100         header("Content-Disposition: attachment; filename=\"$downloadfilename\"");
 101
 102         readfile_chunked($tempfilename);
 103
 104         @unlink($tempfilename);
 105
 106         exit();
 107     }
 108 }
 109
 110 ?>