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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   * Defines the quiz module ettings form.
  19   *
  20   * @package    mod_quiz
  21   * @copyright  2006 Jamie Pratt
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  
  26  defined('MOODLE_INTERNAL') || die();
  27  
  28  require_once($CFG->dirroot . '/course/moodleform_mod.php');
  29  require_once($CFG->dirroot . '/mod/quiz/locallib.php');
  30  
  31  
  32  /**
  33   * Settings form for the quiz module.
  34   *
  35   * @copyright  2006 Jamie Pratt
  36   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  37   */
  38  class mod_quiz_mod_form extends moodleform_mod {
  39      /** @var array options to be used with date_time_selector fields in the quiz. */
  40      public static $datefieldoptions = array('optional' => true, 'step' => 1);
  41  
  42      protected $_feedbacks;
  43      protected static $reviewfields = array(); // Initialised in the constructor.
  44  
  45      /** @var int the max number of attempts allowed in any user or group override on this quiz. */
  46      protected $maxattemptsanyoverride = null;
  47  
  48      public function __construct($current, $section, $cm, $course) {
  49          self::$reviewfields = array(
  50              'attempt'          => array('theattempt', 'quiz'),
  51              'correctness'      => array('whethercorrect', 'question'),
  52              'marks'            => array('marks', 'quiz'),
  53              'specificfeedback' => array('specificfeedback', 'question'),
  54              'generalfeedback'  => array('generalfeedback', 'question'),
  55              'rightanswer'      => array('rightanswer', 'question'),
  56              'overallfeedback'  => array('reviewoverallfeedback', 'quiz'),
  57          );
  58          parent::__construct($current, $section, $cm, $course);
  59      }
  60  
  61      protected function definition() {
  62          global $COURSE, $CFG, $DB, $PAGE;
  63          $quizconfig = get_config('quiz');
  64          $mform = $this->_form;
  65  
  66          // -------------------------------------------------------------------------------
  67          $mform->addElement('header', 'general', get_string('general', 'form'));
  68  
  69          // Name.
  70          $mform->addElement('text', 'name', get_string('name'), array('size'=>'64'));
  71          if (!empty($CFG->formatstringstriptags)) {
  72              $mform->setType('name', PARAM_TEXT);
  73          } else {
  74              $mform->setType('name', PARAM_CLEANHTML);
  75          }
  76          $mform->addRule('name', null, 'required', null, 'client');
  77          $mform->addRule('name', get_string('maximumchars', '', 255), 'maxlength', 255, 'client');
  78  
  79          // Introduction.
  80          $this->standard_intro_elements(get_string('introduction', 'quiz'));
  81  
  82          // -------------------------------------------------------------------------------
  83          $mform->addElement('header', 'timing', get_string('timing', 'quiz'));
  84  
  85          // Open and close dates.
  86          $mform->addElement('date_time_selector', 'timeopen', get_string('quizopen', 'quiz'),
  87                  self::$datefieldoptions);
  88          $mform->addHelpButton('timeopen', 'quizopenclose', 'quiz');
  89  
  90          $mform->addElement('date_time_selector', 'timeclose', get_string('quizclose', 'quiz'),
  91                  self::$datefieldoptions);
  92  
  93          // Time limit.
  94          $mform->addElement('duration', 'timelimit', get_string('timelimit', 'quiz'),
  95                  array('optional' => true));
  96          $mform->addHelpButton('timelimit', 'timelimit', 'quiz');
  97          $mform->setAdvanced('timelimit', $quizconfig->timelimit_adv);
  98          $mform->setDefault('timelimit', $quizconfig->timelimit);
  99  
 100          // What to do with overdue attempts.
 101          $mform->addElement('select', 'overduehandling', get_string('overduehandling', 'quiz'),
 102                  quiz_get_overdue_handling_options());
 103          $mform->addHelpButton('overduehandling', 'overduehandling', 'quiz');
 104          $mform->setAdvanced('overduehandling', $quizconfig->overduehandling_adv);
 105          $mform->setDefault('overduehandling', $quizconfig->overduehandling);
 106          // TODO Formslib does OR logic on disableif, and we need AND logic here.
 107          // $mform->disabledIf('overduehandling', 'timelimit', 'eq', 0);
 108          // $mform->disabledIf('overduehandling', 'timeclose', 'eq', 0);
 109  
 110          // Grace period time.
 111          $mform->addElement('duration', 'graceperiod', get_string('graceperiod', 'quiz'),
 112                  array('optional' => true));
 113          $mform->addHelpButton('graceperiod', 'graceperiod', 'quiz');
 114          $mform->setAdvanced('graceperiod', $quizconfig->graceperiod_adv);
 115          $mform->setDefault('graceperiod', $quizconfig->graceperiod);
 116          $mform->disabledIf('graceperiod', 'overduehandling', 'neq', 'graceperiod');
 117  
 118          // -------------------------------------------------------------------------------
 119          // Grade settings.
 120          $this->standard_grading_coursemodule_elements();
 121  
 122          $mform->removeElement('grade');
 123          if (property_exists($this->current, 'grade')) {
 124              $currentgrade = $this->current->grade;
 125          } else {
 126              $currentgrade = $quizconfig->maximumgrade;
 127          }
 128          $mform->addElement('hidden', 'grade', $currentgrade);
 129          $mform->setType('grade', PARAM_FLOAT);
 130  
 131          // Number of attempts.
 132          $attemptoptions = array('0' => get_string('unlimited'));
 133          for ($i = 1; $i <= QUIZ_MAX_ATTEMPT_OPTION; $i++) {
 134              $attemptoptions[$i] = $i;
 135          }
 136          $mform->addElement('select', 'attempts', get_string('attemptsallowed', 'quiz'),
 137                  $attemptoptions);
 138          $mform->setAdvanced('attempts', $quizconfig->attempts_adv);
 139          $mform->setDefault('attempts', $quizconfig->attempts);
 140  
 141          // Grading method.
 142          $mform->addElement('select', 'grademethod', get_string('grademethod', 'quiz'),
 143                  quiz_get_grading_options());
 144          $mform->addHelpButton('grademethod', 'grademethod', 'quiz');
 145          $mform->setAdvanced('grademethod', $quizconfig->grademethod_adv);
 146          $mform->setDefault('grademethod', $quizconfig->grademethod);
 147          if ($this->get_max_attempts_for_any_override() < 2) {
 148              $mform->disabledIf('grademethod', 'attempts', 'eq', 1);
 149          }
 150  
 151          // -------------------------------------------------------------------------------
 152          $mform->addElement('header', 'layouthdr', get_string('layout', 'quiz'));
 153  
 154          $pagegroup = array();
 155          $pagegroup[] = $mform->createElement('select', 'questionsperpage',
 156                  get_string('newpage', 'quiz'), quiz_questions_per_page_options(), array('id' => 'id_questionsperpage'));
 157          $mform->setDefault('questionsperpage', $quizconfig->questionsperpage);
 158  
 159          if (!empty($this->_cm)) {
 160              $pagegroup[] = $mform->createElement('checkbox', 'repaginatenow', '',
 161                      get_string('repaginatenow', 'quiz'), array('id' => 'id_repaginatenow'));
 162          }
 163  
 164          $mform->addGroup($pagegroup, 'questionsperpagegrp',
 165                  get_string('newpage', 'quiz'), null, false);
 166          $mform->addHelpButton('questionsperpagegrp', 'newpage', 'quiz');
 167          $mform->setAdvanced('questionsperpagegrp', $quizconfig->questionsperpage_adv);
 168  
 169          // Navigation method.
 170          $mform->addElement('select', 'navmethod', get_string('navmethod', 'quiz'),
 171                  quiz_get_navigation_options());
 172          $mform->addHelpButton('navmethod', 'navmethod', 'quiz');
 173          $mform->setAdvanced('navmethod', $quizconfig->navmethod_adv);
 174          $mform->setDefault('navmethod', $quizconfig->navmethod);
 175  
 176          // -------------------------------------------------------------------------------
 177          $mform->addElement('header', 'interactionhdr', get_string('questionbehaviour', 'quiz'));
 178  
 179          // Shuffle within questions.
 180          $mform->addElement('selectyesno', 'shuffleanswers', get_string('shufflewithin', 'quiz'));
 181          $mform->addHelpButton('shuffleanswers', 'shufflewithin', 'quiz');
 182          $mform->setAdvanced('shuffleanswers', $quizconfig->shuffleanswers_adv);
 183          $mform->setDefault('shuffleanswers', $quizconfig->shuffleanswers);
 184  
 185          // How questions behave (question behaviour).
 186          if (!empty($this->current->preferredbehaviour)) {
 187              $currentbehaviour = $this->current->preferredbehaviour;
 188          } else {
 189              $currentbehaviour = '';
 190          }
 191          $behaviours = question_engine::get_behaviour_options($currentbehaviour);
 192          $mform->addElement('select', 'preferredbehaviour',
 193                  get_string('howquestionsbehave', 'question'), $behaviours);
 194          $mform->addHelpButton('preferredbehaviour', 'howquestionsbehave', 'question');
 195          $mform->setDefault('preferredbehaviour', $quizconfig->preferredbehaviour);
 196  
 197          // Can redo completed questions.
 198          $redochoices = array(0 => get_string('no'), 1 => get_string('canredoquestionsyes', 'quiz'));
 199          $mform->addElement('select', 'canredoquestions', get_string('canredoquestions', 'quiz'), $redochoices);
 200          $mform->addHelpButton('canredoquestions', 'canredoquestions', 'quiz');
 201          $mform->setAdvanced('canredoquestions', $quizconfig->canredoquestions_adv);
 202          $mform->setDefault('canredoquestions', $quizconfig->canredoquestions);
 203          foreach ($behaviours as $behaviour => $notused) {
 204              if (!question_engine::can_questions_finish_during_the_attempt($behaviour)) {
 205                  $mform->disabledIf('canredoquestions', 'preferredbehaviour', 'eq', $behaviour);
 206              }
 207          }
 208  
 209          // Each attempt builds on last.
 210          $mform->addElement('selectyesno', 'attemptonlast',
 211                  get_string('eachattemptbuildsonthelast', 'quiz'));
 212          $mform->addHelpButton('attemptonlast', 'eachattemptbuildsonthelast', 'quiz');
 213          $mform->setAdvanced('attemptonlast', $quizconfig->attemptonlast_adv);
 214          $mform->setDefault('attemptonlast', $quizconfig->attemptonlast);
 215          if ($this->get_max_attempts_for_any_override() < 2) {
 216              $mform->disabledIf('attemptonlast', 'attempts', 'eq', 1);
 217          }
 218  
 219          // -------------------------------------------------------------------------------
 220          $mform->addElement('header', 'reviewoptionshdr',
 221                  get_string('reviewoptionsheading', 'quiz'));
 222          $mform->addHelpButton('reviewoptionshdr', 'reviewoptionsheading', 'quiz');
 223  
 224          // Review options.
 225          $this->add_review_options_group($mform, $quizconfig, 'during',
 226                  mod_quiz_display_options::DURING, true);
 227          $this->add_review_options_group($mform, $quizconfig, 'immediately',
 228                  mod_quiz_display_options::IMMEDIATELY_AFTER);
 229          $this->add_review_options_group($mform, $quizconfig, 'open',
 230                  mod_quiz_display_options::LATER_WHILE_OPEN);
 231          $this->add_review_options_group($mform, $quizconfig, 'closed',
 232                  mod_quiz_display_options::AFTER_CLOSE);
 233  
 234          foreach ($behaviours as $behaviour => $notused) {
 235              $unusedoptions = question_engine::get_behaviour_unused_display_options($behaviour);
 236              foreach ($unusedoptions as $unusedoption) {
 237                  $mform->disabledIf($unusedoption . 'during', 'preferredbehaviour',
 238                          'eq', $behaviour);
 239              }
 240          }
 241          $mform->disabledIf('attemptduring', 'preferredbehaviour',
 242                  'neq', 'wontmatch');
 243          $mform->disabledIf('overallfeedbackduring', 'preferredbehaviour',
 244                  'neq', 'wontmatch');
 245  
 246          // -------------------------------------------------------------------------------
 247          $mform->addElement('header', 'display', get_string('appearance'));
 248  
 249          // Show user picture.
 250          $mform->addElement('select', 'showuserpicture', get_string('showuserpicture', 'quiz'),
 251                  quiz_get_user_image_options());
 252          $mform->addHelpButton('showuserpicture', 'showuserpicture', 'quiz');
 253          $mform->setAdvanced('showuserpicture', $quizconfig->showuserpicture_adv);
 254          $mform->setDefault('showuserpicture', $quizconfig->showuserpicture);
 255  
 256          // Overall decimal points.
 257          $options = array();
 258          for ($i = 0; $i <= QUIZ_MAX_DECIMAL_OPTION; $i++) {
 259              $options[$i] = $i;
 260          }
 261          $mform->addElement('select', 'decimalpoints', get_string('decimalplaces', 'quiz'),
 262                  $options);
 263          $mform->addHelpButton('decimalpoints', 'decimalplaces', 'quiz');
 264          $mform->setAdvanced('decimalpoints', $quizconfig->decimalpoints_adv);
 265          $mform->setDefault('decimalpoints', $quizconfig->decimalpoints);
 266  
 267          // Question decimal points.
 268          $options = array(-1 => get_string('sameasoverall', 'quiz'));
 269          for ($i = 0; $i <= QUIZ_MAX_Q_DECIMAL_OPTION; $i++) {
 270              $options[$i] = $i;
 271          }
 272          $mform->addElement('select', 'questiondecimalpoints',
 273                  get_string('decimalplacesquestion', 'quiz'), $options);
 274          $mform->addHelpButton('questiondecimalpoints', 'decimalplacesquestion', 'quiz');
 275          $mform->setAdvanced('questiondecimalpoints', $quizconfig->questiondecimalpoints_adv);
 276          $mform->setDefault('questiondecimalpoints', $quizconfig->questiondecimalpoints);
 277  
 278          // Show blocks during quiz attempt.
 279          $mform->addElement('selectyesno', 'showblocks', get_string('showblocks', 'quiz'));
 280          $mform->addHelpButton('showblocks', 'showblocks', 'quiz');
 281          $mform->setAdvanced('showblocks', $quizconfig->showblocks_adv);
 282          $mform->setDefault('showblocks', $quizconfig->showblocks);
 283  
 284          // -------------------------------------------------------------------------------
 285          $mform->addElement('header', 'security', get_string('extraattemptrestrictions', 'quiz'));
 286  
 287          // Require password to begin quiz attempt.
 288          $mform->addElement('passwordunmask', 'quizpassword', get_string('requirepassword', 'quiz'));
 289          $mform->setType('quizpassword', PARAM_TEXT);
 290          $mform->addHelpButton('quizpassword', 'requirepassword', 'quiz');
 291          $mform->setAdvanced('quizpassword', $quizconfig->password_adv);
 292          $mform->setDefault('quizpassword', $quizconfig->password);
 293  
 294          // IP address.
 295          $mform->addElement('text', 'subnet', get_string('requiresubnet', 'quiz'));
 296          $mform->setType('subnet', PARAM_TEXT);
 297          $mform->addHelpButton('subnet', 'requiresubnet', 'quiz');
 298          $mform->setAdvanced('subnet', $quizconfig->subnet_adv);
 299          $mform->setDefault('subnet', $quizconfig->subnet);
 300  
 301          // Enforced time delay between quiz attempts.
 302          $mform->addElement('duration', 'delay1', get_string('delay1st2nd', 'quiz'),
 303                  array('optional' => true));
 304          $mform->addHelpButton('delay1', 'delay1st2nd', 'quiz');
 305          $mform->setAdvanced('delay1', $quizconfig->delay1_adv);
 306          $mform->setDefault('delay1', $quizconfig->delay1);
 307          if ($this->get_max_attempts_for_any_override() < 2) {
 308              $mform->disabledIf('delay1', 'attempts', 'eq', 1);
 309          }
 310  
 311          $mform->addElement('duration', 'delay2', get_string('delaylater', 'quiz'),
 312                  array('optional' => true));
 313          $mform->addHelpButton('delay2', 'delaylater', 'quiz');
 314          $mform->setAdvanced('delay2', $quizconfig->delay2_adv);
 315          $mform->setDefault('delay2', $quizconfig->delay2);
 316          if ($this->get_max_attempts_for_any_override() < 3) {
 317              $mform->disabledIf('delay2', 'attempts', 'eq', 1);
 318              $mform->disabledIf('delay2', 'attempts', 'eq', 2);
 319          }
 320  
 321          // Browser security choices.
 322          $mform->addElement('select', 'browsersecurity', get_string('browsersecurity', 'quiz'),
 323                  quiz_access_manager::get_browser_security_choices());
 324          $mform->addHelpButton('browsersecurity', 'browsersecurity', 'quiz');
 325          $mform->setAdvanced('browsersecurity', $quizconfig->browsersecurity_adv);
 326          $mform->setDefault('browsersecurity', $quizconfig->browsersecurity);
 327  
 328          // Any other rule plugins.
 329          quiz_access_manager::add_settings_form_fields($this, $mform);
 330  
 331          // -------------------------------------------------------------------------------
 332          $mform->addElement('header', 'overallfeedbackhdr', get_string('overallfeedback', 'quiz'));
 333          $mform->addHelpButton('overallfeedbackhdr', 'overallfeedback', 'quiz');
 334  
 335          if (isset($this->current->grade)) {
 336              $needwarning = $this->current->grade === 0;
 337          } else {
 338              $needwarning = $quizconfig->maximumgrade == 0;
 339          }
 340          if ($needwarning) {
 341              $mform->addElement('static', 'nogradewarning', '',
 342                      get_string('nogradewarning', 'quiz'));
 343          }
 344  
 345          $mform->addElement('static', 'gradeboundarystatic1',
 346                  get_string('gradeboundary', 'quiz'), '100%');
 347  
 348          $repeatarray = array();
 349          $repeatedoptions = array();
 350          $repeatarray[] = $mform->createElement('editor', 'feedbacktext',
 351                  get_string('feedback', 'quiz'), array('rows' => 3), array('maxfiles' => EDITOR_UNLIMITED_FILES,
 352                          'noclean' => true, 'context' => $this->context));
 353          $repeatarray[] = $mform->createElement('text', 'feedbackboundaries',
 354                  get_string('gradeboundary', 'quiz'), array('size' => 10));
 355          $repeatedoptions['feedbacktext']['type'] = PARAM_RAW;
 356          $repeatedoptions['feedbackboundaries']['type'] = PARAM_RAW;
 357  
 358          if (!empty($this->_instance)) {
 359              $this->_feedbacks = $DB->get_records('quiz_feedback',
 360                      array('quizid' => $this->_instance), 'mingrade DESC');
 361              $numfeedbacks = count($this->_feedbacks);
 362          } else {
 363              $this->_feedbacks = array();
 364              $numfeedbacks = $quizconfig->initialnumfeedbacks;
 365          }
 366          $numfeedbacks = max($numfeedbacks, 1);
 367  
 368          $nextel = $this->repeat_elements($repeatarray, $numfeedbacks - 1,
 369                  $repeatedoptions, 'boundary_repeats', 'boundary_add_fields', 3,
 370                  get_string('addmoreoverallfeedbacks', 'quiz'), true);
 371  
 372          // Put some extra elements in before the button.
 373          $mform->insertElementBefore($mform->createElement('editor',
 374                  "feedbacktext[$nextel]", get_string('feedback', 'quiz'), array('rows' => 3),
 375                  array('maxfiles' => EDITOR_UNLIMITED_FILES, 'noclean' => true,
 376                        'context' => $this->context)),
 377                  'boundary_add_fields');
 378          $mform->insertElementBefore($mform->createElement('static',
 379                  'gradeboundarystatic2', get_string('gradeboundary', 'quiz'), '0%'),
 380                  'boundary_add_fields');
 381  
 382          // Add the disabledif rules. We cannot do this using the $repeatoptions parameter to
 383          // repeat_elements because we don't want to dissable the first feedbacktext.
 384          for ($i = 0; $i < $nextel; $i++) {
 385              $mform->disabledIf('feedbackboundaries[' . $i . ']', 'grade', 'eq', 0);
 386              $mform->disabledIf('feedbacktext[' . ($i + 1) . ']', 'grade', 'eq', 0);
 387          }
 388  
 389          // -------------------------------------------------------------------------------
 390          $this->standard_coursemodule_elements();
 391  
 392          // Check and act on whether setting outcomes is considered an advanced setting.
 393          $mform->setAdvanced('modoutcomes', !empty($quizconfig->outcomes_adv));
 394  
 395          // The standard_coursemodule_elements method sets this to 100, but the
 396          // quiz has its own setting, so use that.
 397          $mform->setDefault('grade', $quizconfig->maximumgrade);
 398  
 399          // -------------------------------------------------------------------------------
 400          $this->add_action_buttons();
 401  
 402          $PAGE->requires->yui_module('moodle-mod_quiz-modform', 'M.mod_quiz.modform.init');
 403      }
 404  
 405      protected function add_review_options_group($mform, $quizconfig, $whenname,
 406              $when, $withhelp = false) {
 407          global $OUTPUT;
 408  
 409          $group = array();
 410          foreach (self::$reviewfields as $field => $string) {
 411              list($identifier, $component) = $string;
 412  
 413              $label = get_string($identifier, $component);
 414              if ($withhelp) {
 415                  $label .= ' ' . $OUTPUT->help_icon($identifier, $component);
 416              }
 417  
 418              $group[] = $mform->createElement('checkbox', $field . $whenname, '', $label);
 419          }
 420          $mform->addGroup($group, $whenname . 'optionsgrp',
 421                  get_string('review' . $whenname, 'quiz'), null, false);
 422  
 423          foreach (self::$reviewfields as $field => $notused) {
 424              $cfgfield = 'review' . $field;
 425              if ($quizconfig->$cfgfield & $when) {
 426                  $mform->setDefault($field . $whenname, 1);
 427              } else {
 428                  $mform->setDefault($field . $whenname, 0);
 429              }
 430          }
 431  
 432          if ($whenname != 'during') {
 433              $mform->disabledIf('correctness' . $whenname, 'attempt' . $whenname);
 434              $mform->disabledIf('specificfeedback' . $whenname, 'attempt' . $whenname);
 435              $mform->disabledIf('generalfeedback' . $whenname, 'attempt' . $whenname);
 436              $mform->disabledIf('rightanswer' . $whenname, 'attempt' . $whenname);
 437          }
 438      }
 439  
 440      protected function preprocessing_review_settings(&$toform, $whenname, $when) {
 441          foreach (self::$reviewfields as $field => $notused) {
 442              $fieldname = 'review' . $field;
 443              if (array_key_exists($fieldname, $toform)) {
 444                  $toform[$field . $whenname] = $toform[$fieldname] & $when;
 445              }
 446          }
 447      }
 448  
 449      public function data_preprocessing(&$toform) {
 450          if (isset($toform['grade'])) {
 451              // Convert to a real number, so we don't get 0.0000.
 452              $toform['grade'] = $toform['grade'] + 0;
 453          }
 454  
 455          if (count($this->_feedbacks)) {
 456              $key = 0;
 457              foreach ($this->_feedbacks as $feedback) {
 458                  $draftid = file_get_submitted_draft_itemid('feedbacktext['.$key.']');
 459                  $toform['feedbacktext['.$key.']']['text'] = file_prepare_draft_area(
 460                      $draftid,               // Draftid.
 461                      $this->context->id,     // Context.
 462                      'mod_quiz',             // Component.
 463                      'feedback',             // Filarea.
 464                      !empty($feedback->id) ? (int) $feedback->id : null, // Itemid.
 465                      null,
 466                      $feedback->feedbacktext // Text.
 467                  );
 468                  $toform['feedbacktext['.$key.']']['format'] = $feedback->feedbacktextformat;
 469                  $toform['feedbacktext['.$key.']']['itemid'] = $draftid;
 470  
 471                  if ($toform['grade'] == 0) {
 472                      // When a quiz is un-graded, there can only be one lot of
 473                      // feedback. If the quiz previously had a maximum grade and
 474                      // several lots of feedback, we must now avoid putting text
 475                      // into input boxes that are disabled, but which the
 476                      // validation will insist are blank.
 477                      break;
 478                  }
 479  
 480                  if ($feedback->mingrade > 0) {
 481                      $toform['feedbackboundaries['.$key.']'] =
 482                              round(100.0 * $feedback->mingrade / $toform['grade'], 6) . '%';
 483                  }
 484                  $key++;
 485              }
 486          }
 487  
 488          if (isset($toform['timelimit'])) {
 489              $toform['timelimitenable'] = $toform['timelimit'] > 0;
 490          }
 491  
 492          $this->preprocessing_review_settings($toform, 'during',
 493                  mod_quiz_display_options::DURING);
 494          $this->preprocessing_review_settings($toform, 'immediately',
 495                  mod_quiz_display_options::IMMEDIATELY_AFTER);
 496          $this->preprocessing_review_settings($toform, 'open',
 497                  mod_quiz_display_options::LATER_WHILE_OPEN);
 498          $this->preprocessing_review_settings($toform, 'closed',
 499                  mod_quiz_display_options::AFTER_CLOSE);
 500          $toform['attemptduring'] = true;
 501          $toform['overallfeedbackduring'] = false;
 502  
 503          // Password field - different in form to stop browsers that remember
 504          // passwords from getting confused.
 505          if (isset($toform['password'])) {
 506              $toform['quizpassword'] = $toform['password'];
 507              unset($toform['password']);
 508          }
 509  
 510          // Load any settings belonging to the access rules.
 511          if (!empty($toform['instance'])) {
 512              $accesssettings = quiz_access_manager::load_settings($toform['instance']);
 513              foreach ($accesssettings as $name => $value) {
 514                  $toform[$name] = $value;
 515              }
 516          }
 517      }
 518  
 519      public function validation($data, $files) {
 520          $errors = parent::validation($data, $files);
 521  
 522          // Check open and close times are consistent.
 523          if ($data['timeopen'] != 0 && $data['timeclose'] != 0 &&
 524                  $data['timeclose'] < $data['timeopen']) {
 525              $errors['timeclose'] = get_string('closebeforeopen', 'quiz');
 526          }
 527  
 528          // Check that the grace period is not too short.
 529          if ($data['overduehandling'] == 'graceperiod') {
 530              $graceperiodmin = get_config('quiz', 'graceperiodmin');
 531              if ($data['graceperiod'] <= $graceperiodmin) {
 532                  $errors['graceperiod'] = get_string('graceperiodtoosmall', 'quiz', format_time($graceperiodmin));
 533              }
 534          }
 535  
 536          // Check the boundary value is a number or a percentage, and in range.
 537          $i = 0;
 538          while (!empty($data['feedbackboundaries'][$i] )) {
 539              $boundary = trim($data['feedbackboundaries'][$i]);
 540              if (strlen($boundary) > 0) {
 541                  if ($boundary[strlen($boundary) - 1] == '%') {
 542                      $boundary = trim(substr($boundary, 0, -1));
 543                      if (is_numeric($boundary)) {
 544                          $boundary = $boundary * $data['grade'] / 100.0;
 545                      } else {
 546                          $errors["feedbackboundaries[$i]"] =
 547                                  get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 548                      }
 549                  } else if (!is_numeric($boundary)) {
 550                      $errors["feedbackboundaries[$i]"] =
 551                              get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 552                  }
 553              }
 554              if (is_numeric($boundary) && $boundary <= 0 || $boundary >= $data['grade'] ) {
 555                  $errors["feedbackboundaries[$i]"] =
 556                          get_string('feedbackerrorboundaryoutofrange', 'quiz', $i + 1);
 557              }
 558              if (is_numeric($boundary) && $i > 0 &&
 559                      $boundary >= $data['feedbackboundaries'][$i - 1]) {
 560                  $errors["feedbackboundaries[$i]"] =
 561                          get_string('feedbackerrororder', 'quiz', $i + 1);
 562              }
 563              $data['feedbackboundaries'][$i] = $boundary;
 564              $i += 1;
 565          }
 566          $numboundaries = $i;
 567  
 568          // Check there is nothing in the remaining unused fields.
 569          if (!empty($data['feedbackboundaries'])) {
 570              for ($i = $numboundaries; $i < count($data['feedbackboundaries']); $i += 1) {
 571                  if (!empty($data['feedbackboundaries'][$i] ) &&
 572                          trim($data['feedbackboundaries'][$i] ) != '') {
 573                      $errors["feedbackboundaries[$i]"] =
 574                              get_string('feedbackerrorjunkinboundary', 'quiz', $i + 1);
 575                  }
 576              }
 577          }
 578          for ($i = $numboundaries + 1; $i < count($data['feedbacktext']); $i += 1) {
 579              if (!empty($data['feedbacktext'][$i]['text']) &&
 580                      trim($data['feedbacktext'][$i]['text'] ) != '') {
 581                  $errors["feedbacktext[$i]"] =
 582                          get_string('feedbackerrorjunkinfeedback', 'quiz', $i + 1);
 583              }
 584          }
 585  
 586          // Any other rule plugins.
 587          $errors = quiz_access_manager::validate_settings_form_fields($errors, $data, $files, $this);
 588  
 589          return $errors;
 590      }
 591  
 592      /**
 593       * Display module-specific activity completion rules.
 594       * Part of the API defined by moodleform_mod
 595       * @return array Array of string IDs of added items, empty array if none
 596       */
 597      public function add_completion_rules() {
 598          $mform = $this->_form;
 599          $items = array();
 600  
 601          $group = array();
 602          $group[] = $mform->createElement('advcheckbox', 'completionpass', null, get_string('completionpass', 'quiz'),
 603                  array('group' => 'cpass'));
 604  
 605          $group[] = $mform->createElement('advcheckbox', 'completionattemptsexhausted', null,
 606                  get_string('completionattemptsexhausted', 'quiz'),
 607                  array('group' => 'cattempts'));
 608          $mform->disabledIf('completionattemptsexhausted', 'completionpass', 'notchecked');
 609          $mform->addGroup($group, 'completionpassgroup', get_string('completionpass', 'quiz'), ' &nbsp; ', false);
 610          $mform->addHelpButton('completionpassgroup', 'completionpass', 'quiz');
 611          $items[] = 'completionpassgroup';
 612          return $items;
 613      }
 614  
 615      /**
 616       * Called during validation. Indicates whether a module-specific completion rule is selected.
 617       *
 618       * @param array $data Input data (not yet validated)
 619       * @return bool True if one or more rules is enabled, false if none are.
 620       */
 621      public function completion_rule_enabled($data) {
 622          return !empty($data['completionattemptsexhausted']) || !empty($data['completionpass']);
 623      }
 624  
 625      /**
 626       * Get the maximum number of attempts that anyone might have due to a user
 627       * or group override. Used to decide whether disabledIf rules should be applied.
 628       * @return int the number of attempts allowed. For the purpose of this method,
 629       * unlimited is returned as 1000, not 0.
 630       */
 631      public function get_max_attempts_for_any_override() {
 632          global $DB;
 633  
 634          if (empty($this->_instance)) {
 635              // Quiz not created yet, so no overrides.
 636              return 1;
 637          }
 638  
 639          if ($this->maxattemptsanyoverride === null) {
 640              $this->maxattemptsanyoverride = $DB->get_field_sql("
 641                      SELECT MAX(CASE WHEN attempts = 0 THEN 1000 ELSE attempts END)
 642                        FROM {quiz_overrides}
 643                       WHERE quiz = ?",
 644                      array($this->_instance));
 645              if ($this->maxattemptsanyoverride < 1) {
 646                  // This happens when no override alters the number of attempts.
 647                  $this->maxattemptsanyoverride = 1;
 648              }
 649          }
 650  
 651          return $this->maxattemptsanyoverride;
 652      }
 653  }