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   1  <?php
   2  // This file is part of Stack - http://stack.maths.ed.ac.uk/
   3  //
   4  // Stack 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  // Stack 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 Stack.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Script to download the export of a single question.
  19   *
  20   * @copyright 2015 the Open University
  21   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  22   */
  23  
  24  require_once(__DIR__.'/../config.php');
  25  
  26  require_once($CFG->libdir . '/questionlib.php');
  27  require_once($CFG->dirroot . '/question/format/xml/format.php');
  28  
  29  // Get the parameters from the URL.
  30  $questionid = required_param('id', PARAM_INT);
  31  $cmid = optional_param('cmid', 0, PARAM_INT);
  32  $courseid = optional_param('courseid', 0, PARAM_INT);
  33  $urlparams = ['id' => $questionid, 'sesskey' => sesskey()];
  34  
  35  if ($cmid) {
  36      $cm = get_coursemodule_from_id(null, $cmid);
  37      require_login($cm->course, false, $cm);
  38      $thiscontext = context_module::instance($cmid);
  39      $urlparams['cmid'] = $cmid;
  40  } else if ($courseid) {
  41      require_login($courseid, false);
  42      $thiscontext = context_course::instance($courseid);
  43      $urlparams['courseid'] = $courseid;
  44  } else {
  45      print_error('missingcourseorcmid', 'question');
  46  }
  47  require_sesskey();
  48  
  49  // Load the necessary data.
  50  $contexts = new question_edit_contexts($thiscontext);
  51  $questiondata = question_bank::load_question_data($questionid);
  52  
  53  // Check permissions.
  54  question_require_capability_on($questiondata, 'view');
  55  
  56  // Initialise $PAGE. Nothing is output, so this does not really matter. Just avoids notices.
  57  $nexturl = new moodle_url('/question/type/stack/questiontestrun.php', $urlparams);
  58  $PAGE->set_url('/question/exportone.php', $urlparams);
  59  $PAGE->set_heading($COURSE->fullname);
  60  $PAGE->set_pagelayout('admin');
  61  
  62  // Set up the export format.
  63  $qformat = new qformat_xml();
  64  $filename = question_default_export_filename($COURSE, $questiondata) .
  65          $qformat->export_file_extension();
  66  $qformat->setContexts($contexts->having_one_edit_tab_cap('export'));
  67  $qformat->setCourse($COURSE);
  68  $qformat->setQuestions([$questiondata]);
  69  $qformat->setCattofile(false);
  70  $qformat->setContexttofile(false);
  71  
  72  // Do the export.
  73  if (!$qformat->exportpreprocess()) {
  74      send_file_not_found();
  75  }
  76  if (!$content = $qformat->exportprocess(true)) {
  77      send_file_not_found();
  78  }
  79  send_file($content, $filename, 0, 0, true, true, $qformat->mime_type());