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   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_quiz
  21   * @copyright 2010 Matt Petro
  22   * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  
  26  require_once(__DIR__ . '/../../config.php');
  27  require_once($CFG->dirroot.'/mod/quiz/lib.php');
  28  require_once($CFG->dirroot.'/mod/quiz/locallib.php');
  29  require_once($CFG->dirroot.'/mod/quiz/override_form.php');
  30  
  31  
  32  $cmid = optional_param('cmid', 0, PARAM_INT);
  33  $overrideid = optional_param('id', 0, PARAM_INT);
  34  $action = optional_param('action', null, PARAM_ALPHA);
  35  $reset = optional_param('reset', false, PARAM_BOOL);
  36  
  37  $override = null;
  38  if ($overrideid) {
  39  
  40      if (! $override = $DB->get_record('quiz_overrides', array('id' => $overrideid))) {
  41          print_error('invalidoverrideid', 'quiz');
  42      }
  43      if (! $quiz = $DB->get_record('quiz', array('id' => $override->quiz))) {
  44          print_error('invalidcoursemodule');
  45      }
  46      list($course, $cm) = get_course_and_cm_from_instance($quiz, 'quiz');
  47  
  48  } else if ($cmid) {
  49      list($course, $cm) = get_course_and_cm_from_cmid($cmid, 'quiz');
  50      $quiz = $DB->get_record('quiz', array('id' => $cm->instance), '*', MUST_EXIST);
  51  
  52  } else {
  53      print_error('invalidcoursemodule');
  54  }
  55  $course = $DB->get_record('course', array('id'=>$cm->course), '*', MUST_EXIST);
  56  
  57  $url = new moodle_url('/mod/quiz/overrideedit.php');
  58  if ($action) {
  59      $url->param('action', $action);
  60  }
  61  if ($overrideid) {
  62      $url->param('id', $overrideid);
  63  } else {
  64      $url->param('cmid', $cmid);
  65  }
  66  
  67  $PAGE->set_url($url);
  68  
  69  require_login($course, false, $cm);
  70  
  71  $context = context_module::instance($cm->id);
  72  
  73  // Add or edit an override.
  74  require_capability('mod/quiz:manageoverrides', $context);
  75  
  76  if ($overrideid) {
  77      // Editing an override.
  78      $data = clone $override;
  79  } else {
  80      // Creating a new override.
  81      $data = new stdClass();
  82  }
  83  
  84  // Merge quiz defaults with data.
  85  $keys = array('timeopen', 'timeclose', 'timelimit', 'attempts', 'password');
  86  foreach ($keys as $key) {
  87      if (!isset($data->{$key}) || $reset) {
  88          $data->{$key} = $quiz->{$key};
  89      }
  90  }
  91  
  92  // If we are duplicating an override, then clear the user/group and override id
  93  // since they will change.
  94  if ($action === 'duplicate') {
  95      $override->id = null;
  96      $override->userid = null;
  97      $override->groupid = null;
  98  }
  99  
 100  // True if group-based override.
 101  $groupmode = !empty($data->groupid) || ($action === 'addgroup' && empty($overrideid));
 102  
 103  $overridelisturl = new moodle_url('/mod/quiz/overrides.php', array('cmid'=>$cm->id));
 104  if (!$groupmode) {
 105      $overridelisturl->param('mode', 'user');
 106  }
 107  
 108  // Setup the form.
 109  $mform = new quiz_override_form($url, $cm, $quiz, $context, $groupmode, $override);
 110  $mform->set_data($data);
 111  
 112  if ($mform->is_cancelled()) {
 113      redirect($overridelisturl);
 114  
 115  } else if (optional_param('resetbutton', 0, PARAM_ALPHA)) {
 116      $url->param('reset', true);
 117      redirect($url);
 118  
 119  } else if ($fromform = $mform->get_data()) {
 120      // Process the data.
 121      $fromform->quiz = $quiz->id;
 122  
 123      // Replace unchanged values with null.
 124      foreach ($keys as $key) {
 125          if ($fromform->{$key} == $quiz->{$key}) {
 126              $fromform->{$key} = null;
 127          }
 128      }
 129  
 130      // See if we are replacing an existing override.
 131      $userorgroupchanged = false;
 132      if (empty($override->id)) {
 133          $userorgroupchanged = true;
 134      } else if (!empty($fromform->userid)) {
 135          $userorgroupchanged = $fromform->userid !== $override->userid;
 136      } else {
 137          $userorgroupchanged = $fromform->groupid !== $override->groupid;
 138      }
 139  
 140      if ($userorgroupchanged) {
 141          $conditions = array(
 142                  'quiz' => $quiz->id,
 143                  'userid' => empty($fromform->userid)? null : $fromform->userid,
 144                  'groupid' => empty($fromform->groupid)? null : $fromform->groupid);
 145          if ($oldoverride = $DB->get_record('quiz_overrides', $conditions)) {
 146              // There is an old override, so we merge any new settings on top of
 147              // the older override.
 148              foreach ($keys as $key) {
 149                  if (is_null($fromform->{$key})) {
 150                      $fromform->{$key} = $oldoverride->{$key};
 151                  }
 152              }
 153              // Set the course module id before calling quiz_delete_override().
 154              $quiz->cmid = $cm->id;
 155              quiz_delete_override($quiz, $oldoverride->id);
 156          }
 157      }
 158  
 159      // Set the common parameters for one of the events we may be triggering.
 160      $params = array(
 161          'context' => $context,
 162          'other' => array(
 163              'quizid' => $quiz->id
 164          )
 165      );
 166      if (!empty($override->id)) {
 167          $fromform->id = $override->id;
 168          $DB->update_record('quiz_overrides', $fromform);
 169  
 170          // Determine which override updated event to fire.
 171          $params['objectid'] = $override->id;
 172          if (!$groupmode) {
 173              $params['relateduserid'] = $fromform->userid;
 174              $event = \mod_quiz\event\user_override_updated::create($params);
 175          } else {
 176              $params['other']['groupid'] = $fromform->groupid;
 177              $event = \mod_quiz\event\group_override_updated::create($params);
 178          }
 179  
 180          // Trigger the override updated event.
 181          $event->trigger();
 182      } else {
 183          unset($fromform->id);
 184          $fromform->id = $DB->insert_record('quiz_overrides', $fromform);
 185  
 186          // Determine which override created event to fire.
 187          $params['objectid'] = $fromform->id;
 188          if (!$groupmode) {
 189              $params['relateduserid'] = $fromform->userid;
 190              $event = \mod_quiz\event\user_override_created::create($params);
 191          } else {
 192              $params['other']['groupid'] = $fromform->groupid;
 193              $event = \mod_quiz\event\group_override_created::create($params);
 194          }
 195  
 196          // Trigger the override created event.
 197          $event->trigger();
 198      }
 199  
 200      quiz_update_open_attempts(array('quizid'=>$quiz->id));
 201      quiz_update_events($quiz, $fromform);
 202  
 203      if (!empty($fromform->submitbutton)) {
 204          redirect($overridelisturl);
 205      }
 206  
 207      // The user pressed the 'again' button, so redirect back to this page.
 208      $url->remove_params('cmid');
 209      $url->param('action', 'duplicate');
 210      $url->param('id', $fromform->id);
 211      redirect($url);
 212  
 213  }
 214  
 215  // Print the form.
 216  $pagetitle = get_string('editoverride', 'quiz');
 217  $PAGE->navbar->add($pagetitle);
 218  $PAGE->set_pagelayout('admin');
 219  $PAGE->set_title($pagetitle);
 220  $PAGE->set_heading($course->fullname);
 221  echo $OUTPUT->header();
 222  echo $OUTPUT->heading(format_string($quiz->name, true, array('context' => $context)));
 223  
 224  $mform->display();
 225  
 226  echo $OUTPUT->footer();