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Differences Between: [Versions 311 and 402] [Versions 311 and 403] [Versions 39 and 311]

   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  /**
  18   * Thisscript processes ajax auto-save requests during the quiz.
  19   *
  20   * @package    mod_quiz
  21   * @copyright  2013 The Open University
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  define('AJAX_SCRIPT', true);
  26  
  27  require_once(__DIR__ . '/../../config.php');
  28  require_once($CFG->dirroot . '/mod/quiz/locallib.php');
  29  
  30  // Remember the current time as the time any responses were submitted
  31  // (so as to make sure students don't get penalized for slow processing on this page).
  32  $timenow = time();
  33  require_sesskey();
  34  
  35  // Get submitted parameters.
  36  $attemptid = required_param('attempt',  PARAM_INT);
  37  $thispage  = optional_param('thispage', 0, PARAM_INT);
  38  $cmid      = optional_param('cmid', null, PARAM_INT);
  39  
  40  $transaction = $DB->start_delegated_transaction();
  41  $attemptobj = quiz_create_attempt_handling_errors($attemptid, $cmid);
  42  
  43  // Check login.
  44  require_login($attemptobj->get_course(), false, $attemptobj->get_cm());
  45  
  46  // Check that this attempt belongs to this user.
  47  if ($attemptobj->get_userid() != $USER->id) {
  48      throw new moodle_quiz_exception($attemptobj->get_quizobj(), 'notyourattempt');
  49  }
  50  
  51  // Check capabilities.
  52  if (!$attemptobj->is_preview_user()) {
  53      $attemptobj->require_capability('mod/quiz:attempt');
  54  }
  55  
  56  // If the attempt is already closed, send them to the review page.
  57  if ($attemptobj->is_finished()) {
  58      throw new moodle_quiz_exception($attemptobj->get_quizobj(),
  59              'attemptalreadyclosed', null, $attemptobj->review_url());
  60  }
  61  
  62  $attemptobj->process_auto_save($timenow);
  63  $transaction->allow_commit();
  64  
  65  // Calculate time remaining.
  66  $timeleft = $attemptobj->get_time_left_display($timenow);
  67  
  68  // Build response, only returning timeleft if quiz in-progress
  69  // has a time limit.
  70  $r = new stdClass();
  71  $r->status = "OK";
  72  if ($timeleft !== false) {
  73      $r->timeleft = $timeleft;
  74  }
  75  echo json_encode($r);