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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 listing 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 = required_param('cmid', PARAM_INT);
  33  $mode = optional_param('mode', '', PARAM_ALPHA); // One of 'user' or 'group', default is 'group'.
  34  
  35  list($course, $cm) = get_course_and_cm_from_cmid($cmid, 'quiz');
  36  $quiz = $DB->get_record('quiz', array('id' => $cm->instance), '*', MUST_EXIST);
  37  
  38  // Get the course groups.
  39  $groups = groups_get_all_groups($cm->course);
  40  if ($groups === false) {
  41      $groups = array();
  42  }
  43  
  44  // Default mode is "group", unless there are no groups.
  45  if ($mode != "user" and $mode != "group") {
  46      if (!empty($groups)) {
  47          $mode = "group";
  48      } else {
  49          $mode = "user";
  50      }
  51  }
  52  $groupmode = ($mode == "group");
  53  
  54  $url = new moodle_url('/mod/quiz/overrides.php', array('cmid'=>$cm->id, 'mode'=>$mode));
  55  
  56  $PAGE->set_url($url);
  57  
  58  require_login($course, false, $cm);
  59  
  60  $context = context_module::instance($cm->id);
  61  
  62  // Check the user has the required capabilities to list overrides.
  63  require_capability('mod/quiz:manageoverrides', $context);
  64  
  65  // Display a list of overrides.
  66  $PAGE->set_pagelayout('admin');
  67  $PAGE->set_title(get_string('overrides', 'quiz'));
  68  $PAGE->set_heading($course->fullname);
  69  echo $OUTPUT->header();
  70  echo $OUTPUT->heading(format_string($quiz->name, true, array('context' => $context)));
  71  
  72  // Delete orphaned group overrides.
  73  $sql = 'SELECT o.id
  74              FROM {quiz_overrides} o LEFT JOIN {groups} g
  75              ON o.groupid = g.id
  76              WHERE o.groupid IS NOT NULL
  77                AND g.id IS NULL
  78                AND o.quiz = ?';
  79  $params = array($quiz->id);
  80  $orphaned = $DB->get_records_sql($sql, $params);
  81  if (!empty($orphaned)) {
  82      $DB->delete_records_list('quiz_overrides', 'id', array_keys($orphaned));
  83  }
  84  
  85  // Fetch all overrides.
  86  if ($groupmode) {
  87      $colname = get_string('group');
  88      $sql = 'SELECT o.*, g.name
  89                  FROM {quiz_overrides} o
  90                  JOIN {groups} g ON o.groupid = g.id
  91                  WHERE o.quiz = :quizid
  92                  ORDER BY g.name';
  93      $params = array('quizid' => $quiz->id);
  94  } else {
  95      $colname = get_string('user');
  96      list($sort, $params) = users_order_by_sql('u');
  97      $sql = 'SELECT o.*, ' . get_all_user_name_fields(true, 'u') . '
  98              FROM {quiz_overrides} o
  99              JOIN {user} u ON o.userid = u.id
 100              WHERE o.quiz = :quizid
 101              ORDER BY ' . $sort;
 102      $params['quizid'] = $quiz->id;
 103  }
 104  
 105  $overrides = $DB->get_records_sql($sql, $params);
 106  
 107  // Initialise table.
 108  $table = new html_table();
 109  $table->headspan = array(1, 2, 1);
 110  $table->colclasses = array('colname', 'colsetting', 'colvalue', 'colaction');
 111  $table->head = array(
 112          $colname,
 113          get_string('overrides', 'quiz'),
 114          get_string('action'),
 115  );
 116  
 117  $userurl = new moodle_url('/user/view.php', array());
 118  $groupurl = new moodle_url('/group/overview.php', array('id' => $cm->course));
 119  
 120  $overridedeleteurl = new moodle_url('/mod/quiz/overridedelete.php');
 121  $overrideediturl = new moodle_url('/mod/quiz/overrideedit.php');
 122  
 123  $hasinactive = false; // Whether there are any inactive overrides.
 124  
 125  foreach ($overrides as $override) {
 126  
 127      $fields = array();
 128      $values = array();
 129      $active = true;
 130  
 131      // Check for inactive overrides.
 132      if (!$groupmode) {
 133          if (!has_capability('mod/quiz:attempt', $context, $override->userid)) {
 134              // User not allowed to take the quiz.
 135              $active = false;
 136          } else if (!\core_availability\info_module::is_user_visible($cm, $override->userid)) {
 137              // User cannot access the module.
 138              $active = false;
 139          }
 140      }
 141  
 142      // Format timeopen.
 143      if (isset($override->timeopen)) {
 144          $fields[] = get_string('quizopens', 'quiz');
 145          $values[] = $override->timeopen > 0 ?
 146                  userdate($override->timeopen) : get_string('noopen', 'quiz');
 147      }
 148  
 149      // Format timeclose.
 150      if (isset($override->timeclose)) {
 151          $fields[] = get_string('quizcloses', 'quiz');
 152          $values[] = $override->timeclose > 0 ?
 153                  userdate($override->timeclose) : get_string('noclose', 'quiz');
 154      }
 155  
 156      // Format timelimit.
 157      if (isset($override->timelimit)) {
 158          $fields[] = get_string('timelimit', 'quiz');
 159          $values[] = $override->timelimit > 0 ?
 160                  format_time($override->timelimit) : get_string('none', 'quiz');
 161      }
 162  
 163      // Format number of attempts.
 164      if (isset($override->attempts)) {
 165          $fields[] = get_string('attempts', 'quiz');
 166          $values[] = $override->attempts > 0 ?
 167                  $override->attempts : get_string('unlimited');
 168      }
 169  
 170      // Format password.
 171      if (isset($override->password)) {
 172          $fields[] = get_string('requirepassword', 'quiz');
 173          $values[] = $override->password !== '' ?
 174                  get_string('enabled', 'quiz') : get_string('none', 'quiz');
 175      }
 176  
 177      // Icons.
 178      $iconstr = '';
 179  
 180      if ($active) {
 181          // Edit.
 182          $editurlstr = $overrideediturl->out(true, array('id' => $override->id));
 183          $iconstr = '<a title="' . get_string('edit') . '" href="'. $editurlstr . '">' .
 184                  '<img src="' . $OUTPUT->pix_url('t/edit') . '" class="iconsmall" alt="' .
 185                  get_string('edit') . '" /></a> ';
 186          // Duplicate.
 187          $copyurlstr = $overrideediturl->out(true,
 188                  array('id' => $override->id, 'action' => 'duplicate'));
 189          $iconstr .= '<a title="' . get_string('copy') . '" href="' . $copyurlstr . '">' .
 190                  '<img src="' . $OUTPUT->pix_url('t/copy') . '" class="iconsmall" alt="' .
 191                  get_string('copy') . '" /></a> ';
 192      }
 193      // Delete.
 194      $deleteurlstr = $overridedeleteurl->out(true,
 195              array('id' => $override->id, 'sesskey' => sesskey()));
 196      $iconstr .= '<a title="' . get_string('delete') . '" href="' . $deleteurlstr . '">' .
 197              '<img src="' . $OUTPUT->pix_url('t/delete') . '" class="iconsmall" alt="' .
 198              get_string('delete') . '" /></a> ';
 199  
 200      if ($groupmode) {
 201          $usergroupstr = '<a href="' . $groupurl->out(true,
 202                  array('group' => $override->groupid)) . '" >' . $override->name . '</a>';
 203      } else {
 204          $usergroupstr = '<a href="' . $userurl->out(true,
 205                  array('id' => $override->userid)) . '" >' . fullname($override) . '</a>';
 206      }
 207  
 208      $class = '';
 209      if (!$active) {
 210          $class = "dimmed_text";
 211          $usergroupstr .= '*';
 212          $hasinactive = true;
 213      }
 214  
 215      $usergroupcell = new html_table_cell();
 216      $usergroupcell->rowspan = count($fields);
 217      $usergroupcell->text = $usergroupstr;
 218      $actioncell = new html_table_cell();
 219      $actioncell->rowspan = count($fields);
 220      $actioncell->text = $iconstr;
 221  
 222      for ($i = 0; $i < count($fields); ++$i) {
 223          $row = new html_table_row();
 224          $row->attributes['class'] = $class;
 225          if ($i == 0) {
 226              $row->cells[] = $usergroupcell;
 227          }
 228          $cell1 = new html_table_cell();
 229          $cell1->text = $fields[$i];
 230          $row->cells[] = $cell1;
 231          $cell2 = new html_table_cell();
 232          $cell2->text = $values[$i];
 233          $row->cells[] = $cell2;
 234          if ($i == 0) {
 235              $row->cells[] = $actioncell;
 236          }
 237          $table->data[] = $row;
 238      }
 239  }
 240  
 241  // Output the table and button.
 242  echo html_writer::start_tag('div', array('id' => 'quizoverrides'));
 243  if (count($table->data)) {
 244      echo html_writer::table($table);
 245  }
 246  if ($hasinactive) {
 247      echo $OUTPUT->notification(get_string('inactiveoverridehelp', 'quiz'), 'dimmed_text');
 248  }
 249  
 250  echo html_writer::start_tag('div', array('class' => 'buttons'));
 251  $options = array();
 252  if ($groupmode) {
 253      if (empty($groups)) {
 254          // There are no groups.
 255          echo $OUTPUT->notification(get_string('groupsnone', 'quiz'), 'error');
 256          $options['disabled'] = true;
 257      }
 258      echo $OUTPUT->single_button($overrideediturl->out(true,
 259              array('action' => 'addgroup', 'cmid' => $cm->id)),
 260              get_string('addnewgroupoverride', 'quiz'), 'post', $options);
 261  } else {
 262      $users = array();
 263      // See if there are any students in the quiz.
 264      $users = get_users_by_capability($context, 'mod/quiz:attempt', 'u.id');
 265      $info = new \core_availability\info_module($cm);
 266      $users = $info->filter_user_list($users);
 267  
 268      if (empty($users)) {
 269          // There are no students.
 270          echo $OUTPUT->notification(get_string('usersnone', 'quiz'), 'error');
 271          $options['disabled'] = true;
 272      }
 273      echo $OUTPUT->single_button($overrideediturl->out(true,
 274              array('action' => 'adduser', 'cmid' => $cm->id)),
 275              get_string('addnewuseroverride', 'quiz'), 'get', $options);
 276  }
 277  echo html_writer::end_tag('div');
 278  echo html_writer::end_tag('div');
 279  
 280  // Finish the page.
 281  echo $OUTPUT->footer();