mod/quiz/startattempt.php

   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  * This script deals with starting a new attempt at a quiz.
  19  *
  20  * Normally, it will end up redirecting to attempt.php - unless a password form is displayed.
  21  *
  22  * This code used to be at the top of attempt.php, if you are looking for CVS history.
  23  *
  24  * @package   mod_quiz
  25  * @copyright 2009 The Open University
  26  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  27  */
  28
  29 require_once(__DIR__ . '/../../config.php');
  30 require_once($CFG->dirroot . '/mod/quiz/locallib.php');
  31
  32 // Get submitted parameters.
  33 $id = required_param('cmid', PARAM_INT); // Course module id
  34 $forcenew = optional_param('forcenew', false, PARAM_BOOL); // Used to force a new preview
  35 $page = optional_param('page', -1, PARAM_INT); // Page to jump to in the attempt.
  36
  37 if (!$cm = get_coursemodule_from_id('quiz', $id)) {
  38     throw new \moodle_exception('invalidcoursemodule');
  39 }
  40 if (!$course = $DB->get_record('course', array('id' => $cm->course))) {
  41     throw new \moodle_exception("coursemisconf");
  42 }
  43
  44 $quizobj = quiz::create($cm->instance, $USER->id);
  45 // This script should only ever be posted to, so set page URL to the view page.
  46 $PAGE->set_url($quizobj->view_url());
  47 // During quiz attempts, the browser back/forwards buttons should force a reload.
  48 $PAGE->set_cacheable(false);
  49
  50 // Check login and sesskey.
  51 require_login($quizobj->get_course(), false, $quizobj->get_cm());
  52 require_sesskey();
  53 $PAGE->set_heading($quizobj->get_course()->fullname);
  54
  55 // If no questions have been set up yet redirect to edit.php or display an error.
  56 if (!$quizobj->has_questions()) {
  57     if ($quizobj->has_capability('mod/quiz:manage')) {
  58         redirect($quizobj->edit_url());
  59     } else {
  60         throw new \moodle_exception('cannotstartnoquestions', 'quiz', $quizobj->view_url());
  61     }
  62 }
  63
  64 // Create an object to manage all the other (non-roles) access rules.
  65 $timenow = time();
  66 $accessmanager = $quizobj->get_access_manager($timenow);
  67
  68 // Validate permissions for creating a new attempt and start a new preview attempt if required.
  69 list($currentattemptid, $attemptnumber, $lastattempt, $messages, $page) =
  70     quiz_validate_new_attempt($quizobj, $accessmanager, $forcenew, $page, true);
  71
  72 // Check access.
  73 if (!$quizobj->is_preview_user() && $messages) {
  74     $output = $PAGE->get_renderer('mod_quiz');
  75     throw new \moodle_exception('attempterror', 'quiz', $quizobj->view_url(),
  76             $output->access_messages($messages));
  77 }
  78
  79 if ($accessmanager->is_preflight_check_required($currentattemptid)) {
  80     // Need to do some checks before allowing the user to continue.
  81     $mform = $accessmanager->get_preflight_check_form(
  82             $quizobj->start_attempt_url($page), $currentattemptid);
  83
  84     if ($mform->is_cancelled()) {
  85         $accessmanager->back_to_view_page($PAGE->get_renderer('mod_quiz'));
  86
  87     } else if (!$mform->get_data()) {
  88
  89         // Form not submitted successfully, re-display it and stop.
  90         $PAGE->set_url($quizobj->start_attempt_url($page));
  91         $PAGE->set_title($quizobj->get_quiz_name());
  92         $accessmanager->setup_attempt_page($PAGE);
  93         $output = $PAGE->get_renderer('mod_quiz');
  94         if (empty($quizobj->get_quiz()->showblocks)) {
  95             $PAGE->blocks->show_only_fake_blocks();
  96         }
  97
  98         echo $output->start_attempt_page($quizobj, $mform);
  99         die();
 100     }
 101
 102     // Pre-flight check passed.
 103     $accessmanager->notify_preflight_check_passed($currentattemptid);
 104 }
 105 if ($currentattemptid) {
 106     if ($lastattempt->state == quiz_attempt::OVERDUE) {
 107         redirect($quizobj->summary_url($lastattempt->id));
 108     } else {
 109         redirect($quizobj->attempt_url($currentattemptid, $page));
 110     }
 111 }
 112
 113 $attempt = quiz_prepare_and_start_new_attempt($quizobj, $attemptnumber, $lastattempt);
 114
 115 // Redirect to the attempt page.
 116 redirect($quizobj->attempt_url($attempt->id, $page));