mod/quiz/overrideedit.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 page handles editing and creation of quiz overrides
  19  *
  20  * @package    mod
  21  * @subpackage quiz
  22  * @copyright  2010 Matt Petro
  23  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24  */
  25
  26
  27 require_once(dirname(__FILE__) . '/../../config.php');
  28 require_once($CFG->dirroot.'/mod/quiz/lib.php');
  29 require_once($CFG->dirroot.'/mod/quiz/locallib.php');
  30 require_once($CFG->dirroot.'/mod/quiz/override_form.php');
  31
  32
  33 $cmid = optional_param('cmid', 0, PARAM_INT);
  34 $overrideid = optional_param('id', 0, PARAM_INT);
  35 $action = optional_param('action', null, PARAM_ALPHA);
  36 $reset = optional_param('reset', false, PARAM_BOOL);
  37
  38 $override = null;
  39 if ($overrideid) {
  40
  41     if (! $override = $DB->get_record('quiz_overrides', array('id' => $overrideid))) {
  42         print_error('invalidoverrideid', 'quiz');
  43     }
  44     if (! $quiz = $DB->get_record('quiz', array('id' => $override->quiz))) {
  45         print_error('invalidcoursemodule');
  46     }
  47     if (! $cm = get_coursemodule_from_instance("quiz", $quiz->id, $quiz->course)) {
  48         print_error('invalidcoursemodule');
  49     }
  50 } else if ($cmid) {
  51
  52     if (! $cm = get_coursemodule_from_id('quiz', $cmid)) {
  53         print_error('invalidcoursemodule');
  54     }
  55     if (! $quiz = $DB->get_record('quiz', array('id' => $cm->instance))) {
  56         print_error('invalidcoursemodule');
  57     }
  58 } else {
  59     print_error('invalidcoursemodule');
  60 }
  61 $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  62
  63 $url = new moodle_url('/mod/quiz/overrideedit.php');
  64 if ($action) {
  65     $url->param('action', $action);
  66 }
  67 if ($overrideid) {
  68     $url->param('id', $overrideid);
  69 } else {
  70     $url->param('cmid', $cmid);
  71 }
  72
  73 $PAGE->set_url($url);
  74
  75 require_login($course, false, $cm);
  76
  77 $context = context_module::instance($cm->id);
  78
  79 // Add or edit an override.
  80 require_capability('mod/quiz:manageoverrides', $context);
  81
  82 if ($overrideid) {
  83     // Editing an override.
  84     $data = clone $override;
  85 } else {
  86     // Creating a new override.
  87     $data = new stdClass();
  88 }
  89
  90 // Merge quiz defaults with data.
  91 $keys = array('timeopen', 'timeclose', 'timelimit', 'attempts', 'password');
  92 foreach ($keys as $key) {
  93     if (!isset($data->{$key}) || $reset) {
  94         $data->{$key} = $quiz->{$key};
  95     }
  96 }
  97
  98 // If we are duplicating an override, then clear the user/group and override id
  99 // since they will change.
 100 if ($action === 'duplicate') {
 101     $override->id = null;
 102     $override->userid = null;
 103     $override->groupid = null;
 104 }
 105
 106 // True if group-based override.
 107 $groupmode = !empty($data->groupid) || ($action === 'addgroup' && empty($overrideid));
 108
 109 $overridelisturl = new moodle_url('/mod/quiz/overrides.php', array('cmid'=>$cm->id));
 110 if (!$groupmode) {
 111     $overridelisturl->param('mode', 'user');
 112 }
 113
 114 // Setup the form.
 115 $mform = new quiz_override_form($url, $cm, $quiz, $context, $groupmode, $override);
 116 $mform->set_data($data);
 117
 118 if ($mform->is_cancelled()) {
 119     redirect($overridelisturl);
 120
 121 } else if (optional_param('resetbutton', 0, PARAM_ALPHA)) {
 122     $url->param('reset', true);
 123     redirect($url);
 124
 125 } else if ($fromform = $mform->get_data()) {
 126     // Process the data.
 127     $fromform->quiz = $quiz->id;
 128
 129     // Replace unchanged values with null.
 130     foreach ($keys as $key) {
 131         if ($fromform->{$key} == $quiz->{$key}) {
 132             $fromform->{$key} = null;
 133         }
 134     }
 135
 136     // See if we are replacing an existing override.
 137     $userorgroupchanged = false;
 138     if (empty($override->id)) {
 139         $userorgroupchanged = true;
 140     } else if (!empty($fromform->userid)) {
 141         $userorgroupchanged = $fromform->userid !== $override->userid;
 142     } else {
 143         $userorgroupchanged = $fromform->groupid !== $override->groupid;
 144     }
 145
 146     if ($userorgroupchanged) {
 147         $conditions = array(
 148                 'quiz' => $quiz->id,
 149                 'userid' => empty($fromform->userid)? null : $fromform->userid,
 150                 'groupid' => empty($fromform->groupid)? null : $fromform->groupid);
 151         if ($oldoverride = $DB->get_record('quiz_overrides', $conditions)) {
 152             // There is an old override, so we merge any new settings on top of
 153             // the older override.
 154             foreach ($keys as $key) {
 155                 if (is_null($fromform->{$key})) {
 156                     $fromform->{$key} = $oldoverride->{$key};
 157                 }
 158             }
 159             // Delete the old override.
 160             $DB->delete_records('quiz_overrides', array('id' => $oldoverride->id));
 161         }
 162     }
 163
 164     if (!empty($override->id)) {
 165         $fromform->id = $override->id;
 166         $DB->update_record('quiz_overrides', $fromform);
 167     } else {
 168         unset($fromform->id);
 169         $fromform->id = $DB->insert_record('quiz_overrides', $fromform);
 170     }
 171
 172     quiz_update_open_attempts(array('quizid'=>$quiz->id));
 173     quiz_update_events($quiz, $fromform);
 174
 175     add_to_log($cm->course, 'quiz', 'edit override',
 176             "overrideedit.php?id=$fromform->id", $quiz->id, $cm->id);
 177
 178     if (!empty($fromform->submitbutton)) {
 179         redirect($overridelisturl);
 180     }
 181
 182     // The user pressed the 'again' button, so redirect back to this page.
 183     $url->remove_params('cmid');
 184     $url->param('action', 'duplicate');
 185     $url->param('id', $fromform->id);
 186     redirect($url);
 187
 188 }
 189
 190 // Print the form.
 191 $pagetitle = get_string('editoverride', 'quiz');
 192 $PAGE->navbar->add($pagetitle);
 193 $PAGE->set_pagelayout('admin');
 194 $PAGE->set_title($pagetitle);
 195 $PAGE->set_heading($course->fullname);
 196 echo $OUTPUT->header();
 197 echo $OUTPUT->heading($pagetitle);
 198
 199 $mform->display();
 200
 201 echo $OUTPUT->footer();