mod/quiz/mod_form.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  * 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->add_intro_editor(false, 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         // Shuffle questions.
 155         $shuffleoptions = array(
 156             0 => get_string('asshownoneditscreen', 'quiz'),
 157             1 => get_string('shuffledrandomly', 'quiz')
 158         );
 159         $mform->addElement('select', 'shufflequestions', get_string('questionorder', 'quiz'),
 160                 $shuffleoptions, array('id' => 'id_shufflequestions'));
 161         $mform->setAdvanced('shufflequestions', $quizconfig->shufflequestions_adv);
 162         $mform->setDefault('shufflequestions', $quizconfig->shufflequestions);
 163
 164         $pagegroup = array();
 165         $pagegroup[] = $mform->createElement('select', 'questionsperpage',
 166                 get_string('newpage', 'quiz'), quiz_questions_per_page_options(), array('id' => 'id_questionsperpage'));
 167         $mform->setDefault('questionsperpage', $quizconfig->questionsperpage);
 168
 169         if (!empty($this->_cm)) {
 170             $pagegroup[] = $mform->createElement('checkbox', 'repaginatenow', '',
 171                     get_string('repaginatenow', 'quiz'), array('id' => 'id_repaginatenow'));
 172             $mform->disabledIf('repaginatenow', 'shufflequestions', 'eq', 1);
 173         }
 174
 175         $mform->addGroup($pagegroup, 'questionsperpagegrp',
 176                 get_string('newpage', 'quiz'), null, false);
 177         $mform->addHelpButton('questionsperpagegrp', 'newpage', 'quiz');
 178         $mform->setAdvanced('questionsperpagegrp', $quizconfig->questionsperpage_adv);
 179
 180         // Navigation method.
 181         $mform->addElement('select', 'navmethod', get_string('navmethod', 'quiz'),
 182                 quiz_get_navigation_options());
 183         $mform->addHelpButton('navmethod', 'navmethod', 'quiz');
 184         $mform->setAdvanced('navmethod', $quizconfig->navmethod_adv);
 185         $mform->setDefault('navmethod', $quizconfig->navmethod);
 186
 187         // -------------------------------------------------------------------------------
 188         $mform->addElement('header', 'interactionhdr', get_string('questionbehaviour', 'quiz'));
 189
 190         // Shuffle within questions.
 191         $mform->addElement('selectyesno', 'shuffleanswers', get_string('shufflewithin', 'quiz'));
 192         $mform->addHelpButton('shuffleanswers', 'shufflewithin', 'quiz');
 193         $mform->setAdvanced('shuffleanswers', $quizconfig->shuffleanswers_adv);
 194         $mform->setDefault('shuffleanswers', $quizconfig->shuffleanswers);
 195
 196         // How questions behave (question behaviour).
 197         if (!empty($this->current->preferredbehaviour)) {
 198             $currentbehaviour = $this->current->preferredbehaviour;
 199         } else {
 200             $currentbehaviour = '';
 201         }
 202         $behaviours = question_engine::get_behaviour_options($currentbehaviour);
 203         $mform->addElement('select', 'preferredbehaviour',
 204                 get_string('howquestionsbehave', 'question'), $behaviours);
 205         $mform->addHelpButton('preferredbehaviour', 'howquestionsbehave', 'question');
 206         $mform->setDefault('preferredbehaviour', $quizconfig->preferredbehaviour);
 207
 208         // Each attempt builds on last.
 209         $mform->addElement('selectyesno', 'attemptonlast',
 210                 get_string('eachattemptbuildsonthelast', 'quiz'));
 211         $mform->addHelpButton('attemptonlast', 'eachattemptbuildsonthelast', 'quiz');
 212         $mform->setAdvanced('attemptonlast', $quizconfig->attemptonlast_adv);
 213         $mform->setDefault('attemptonlast', $quizconfig->attemptonlast);
 214         if ($this->get_max_attempts_for_any_override() < 2) {
 215             $mform->disabledIf('attemptonlast', 'attempts', 'eq', 1);
 216         }
 217
 218         // -------------------------------------------------------------------------------
 219         $mform->addElement('header', 'reviewoptionshdr',
 220                 get_string('reviewoptionsheading', 'quiz'));
 221         $mform->addHelpButton('reviewoptionshdr', 'reviewoptionsheading', 'quiz');
 222
 223         // Review options.
 224         $this->add_review_options_group($mform, $quizconfig, 'during',
 225                 mod_quiz_display_options::DURING, true);
 226         $this->add_review_options_group($mform, $quizconfig, 'immediately',
 227                 mod_quiz_display_options::IMMEDIATELY_AFTER);
 228         $this->add_review_options_group($mform, $quizconfig, 'open',
 229                 mod_quiz_display_options::LATER_WHILE_OPEN);
 230         $this->add_review_options_group($mform, $quizconfig, 'closed',
 231                 mod_quiz_display_options::AFTER_CLOSE);
 232
 233         foreach ($behaviours as $behaviour => $notused) {
 234             $unusedoptions = question_engine::get_behaviour_unused_display_options($behaviour);
 235             foreach ($unusedoptions as $unusedoption) {
 236                 $mform->disabledIf($unusedoption . 'during', 'preferredbehaviour',
 237                         'eq', $behaviour);
 238             }
 239         }
 240         $mform->disabledIf('attemptduring', 'preferredbehaviour',
 241                 'neq', 'wontmatch');
 242         $mform->disabledIf('overallfeedbackduring', 'preferredbehaviour',
 243                 'neq', 'wontmatch');
 244
 245         // -------------------------------------------------------------------------------
 246         $mform->addElement('header', 'display', get_string('appearance'));
 247
 248         // Show user picture.
 249         $mform->addElement('select', 'showuserpicture', get_string('showuserpicture', 'quiz'),
 250                 quiz_get_user_image_options());
 251         $mform->addHelpButton('showuserpicture', 'showuserpicture', 'quiz');
 252         $mform->setAdvanced('showuserpicture', $quizconfig->showuserpicture_adv);
 253         $mform->setDefault('showuserpicture', $quizconfig->showuserpicture);
 254
 255         // Overall decimal points.
 256         $options = array();
 257         for ($i = 0; $i <= QUIZ_MAX_DECIMAL_OPTION; $i++) {
 258             $options[$i] = $i;
 259         }
 260         $mform->addElement('select', 'decimalpoints', get_string('decimalplaces', 'quiz'),
 261                 $options);
 262         $mform->addHelpButton('decimalpoints', 'decimalplaces', 'quiz');
 263         $mform->setAdvanced('decimalpoints', $quizconfig->decimalpoints_adv);
 264         $mform->setDefault('decimalpoints', $quizconfig->decimalpoints);
 265
 266         // Question decimal points.
 267         $options = array(-1 => get_string('sameasoverall', 'quiz'));
 268         for ($i = 0; $i <= QUIZ_MAX_Q_DECIMAL_OPTION; $i++) {
 269             $options[$i] = $i;
 270         }
 271         $mform->addElement('select', 'questiondecimalpoints',
 272                 get_string('decimalplacesquestion', 'quiz'), $options);
 273         $mform->addHelpButton('questiondecimalpoints', 'decimalplacesquestion', 'quiz');
 274         $mform->setAdvanced('questiondecimalpoints', $quizconfig->questiondecimalpoints_adv);
 275         $mform->setDefault('questiondecimalpoints', $quizconfig->questiondecimalpoints);
 276
 277         // Show blocks during quiz attempt.
 278         $mform->addElement('selectyesno', 'showblocks', get_string('showblocks', 'quiz'));
 279         $mform->addHelpButton('showblocks', 'showblocks', 'quiz');
 280         $mform->setAdvanced('showblocks', $quizconfig->showblocks_adv);
 281         $mform->setDefault('showblocks', $quizconfig->showblocks);
 282
 283         // -------------------------------------------------------------------------------
 284         $mform->addElement('header', 'security', get_string('extraattemptrestrictions', 'quiz'));
 285
 286         // Require password to begin quiz attempt.
 287         $mform->addElement('passwordunmask', 'quizpassword', get_string('requirepassword', 'quiz'));
 288         $mform->setType('quizpassword', PARAM_TEXT);
 289         $mform->addHelpButton('quizpassword', 'requirepassword', 'quiz');
 290         $mform->setAdvanced('quizpassword', $quizconfig->password_adv);
 291         $mform->setDefault('quizpassword', $quizconfig->password);
 292
 293         // IP address.
 294         $mform->addElement('text', 'subnet', get_string('requiresubnet', 'quiz'));
 295         $mform->setType('subnet', PARAM_TEXT);
 296         $mform->addHelpButton('subnet', 'requiresubnet', 'quiz');
 297         $mform->setAdvanced('subnet', $quizconfig->subnet_adv);
 298         $mform->setDefault('subnet', $quizconfig->subnet);
 299
 300         // Enforced time delay between quiz attempts.
 301         $mform->addElement('duration', 'delay1', get_string('delay1st2nd', 'quiz'),
 302                 array('optional' => true));
 303         $mform->addHelpButton('delay1', 'delay1st2nd', 'quiz');
 304         $mform->setAdvanced('delay1', $quizconfig->delay1_adv);
 305         $mform->setDefault('delay1', $quizconfig->delay1);
 306         if ($this->get_max_attempts_for_any_override() < 2) {
 307             $mform->disabledIf('delay1', 'attempts', 'eq', 1);
 308         }
 309
 310         $mform->addElement('duration', 'delay2', get_string('delaylater', 'quiz'),
 311                 array('optional' => true));
 312         $mform->addHelpButton('delay2', 'delaylater', 'quiz');
 313         $mform->setAdvanced('delay2', $quizconfig->delay2_adv);
 314         $mform->setDefault('delay2', $quizconfig->delay2);
 315         if ($this->get_max_attempts_for_any_override() < 3) {
 316             $mform->disabledIf('delay2', 'attempts', 'eq', 1);
 317             $mform->disabledIf('delay2', 'attempts', 'eq', 2);
 318         }
 319
 320         // Browser security choices.
 321         $mform->addElement('select', 'browsersecurity', get_string('browsersecurity', 'quiz'),
 322                 quiz_access_manager::get_browser_security_choices());
 323         $mform->addHelpButton('browsersecurity', 'browsersecurity', 'quiz');
 324         $mform->setAdvanced('browsersecurity', $quizconfig->browsersecurity_adv);
 325         $mform->setDefault('browsersecurity', $quizconfig->browsersecurity);
 326
 327         // Any other rule plugins.
 328         quiz_access_manager::add_settings_form_fields($this, $mform);
 329
 330         // -------------------------------------------------------------------------------
 331         $mform->addElement('header', 'overallfeedbackhdr', get_string('overallfeedback', 'quiz'));
 332         $mform->addHelpButton('overallfeedbackhdr', 'overallfeedback', 'quiz');
 333
 334         if (isset($this->current->grade)) {
 335             $needwarning = $this->current->grade === 0;
 336         } else {
 337             $needwarning = $quizconfig->maximumgrade == 0;
 338         }
 339         if ($needwarning) {
 340             $mform->addElement('static', 'nogradewarning', '',
 341                     get_string('nogradewarning', 'quiz'));
 342         }
 343
 344         $mform->addElement('static', 'gradeboundarystatic1',
 345                 get_string('gradeboundary', 'quiz'), '100%');
 346
 347         $repeatarray = array();
 348         $repeatedoptions = array();
 349         $repeatarray[] = $mform->createElement('editor', 'feedbacktext',
 350                 get_string('feedback', 'quiz'), array('rows' => 3), array('maxfiles' => EDITOR_UNLIMITED_FILES,
 351                         'noclean' => true, 'context' => $this->context));
 352         $repeatarray[] = $mform->createElement('text', 'feedbackboundaries',
 353                 get_string('gradeboundary', 'quiz'), array('size' => 10));
 354         $repeatedoptions['feedbacktext']['type'] = PARAM_RAW;
 355         $repeatedoptions['feedbackboundaries']['type'] = PARAM_RAW;
 356
 357         if (!empty($this->_instance)) {
 358             $this->_feedbacks = $DB->get_records('quiz_feedback',
 359                     array('quizid' => $this->_instance), 'mingrade DESC');
 360         } else {
 361             $this->_feedbacks = array();
 362         }
 363         $numfeedbacks = max(count($this->_feedbacks) * 1.5, 5);
 364
 365         $nextel = $this->repeat_elements($repeatarray, $numfeedbacks - 1,
 366                 $repeatedoptions, 'boundary_repeats', 'boundary_add_fields', 3,
 367                 get_string('addmoreoverallfeedbacks', 'quiz'), true);
 368
 369         // Put some extra elements in before the button.
 370         $mform->insertElementBefore($mform->createElement('editor',
 371                 "feedbacktext[$nextel]", get_string('feedback', 'quiz'), array('rows' => 3),
 372                 array('maxfiles' => EDITOR_UNLIMITED_FILES, 'noclean' => true,
 373                       'context' => $this->context)),
 374                 'boundary_add_fields');
 375         $mform->insertElementBefore($mform->createElement('static',
 376                 'gradeboundarystatic2', get_string('gradeboundary', 'quiz'), '0%'),
 377                 'boundary_add_fields');
 378
 379         // Add the disabledif rules. We cannot do this using the $repeatoptions parameter to
 380         // repeat_elements because we don't want to dissable the first feedbacktext.
 381         for ($i = 0; $i < $nextel; $i++) {
 382             $mform->disabledIf('feedbackboundaries[' . $i . ']', 'grade', 'eq', 0);
 383             $mform->disabledIf('feedbacktext[' . ($i + 1) . ']', 'grade', 'eq', 0);
 384         }
 385
 386         // -------------------------------------------------------------------------------
 387         $this->standard_coursemodule_elements();
 388
 389         // Check and act on whether setting outcomes is considered an advanced setting.
 390         $mform->setAdvanced('modoutcomes', !empty($quizconfig->outcomes_adv));
 391
 392         // The standard_coursemodule_elements method sets this to 100, but the
 393         // quiz has its own setting, so use that.
 394         $mform->setDefault('grade', $quizconfig->maximumgrade);
 395
 396         // -------------------------------------------------------------------------------
 397         $this->add_action_buttons();
 398
 399         $PAGE->requires->yui_module('moodle-mod_quiz-modform', 'M.mod_quiz.modform.init');
 400     }
 401
 402     protected function add_review_options_group($mform, $quizconfig, $whenname,
 403             $when, $withhelp = false) {
 404         global $OUTPUT;
 405
 406         $group = array();
 407         foreach (self::$reviewfields as $field => $string) {
 408             list($identifier, $component) = $string;
 409
 410             $label = get_string($identifier, $component);
 411             if ($withhelp) {
 412                 $label .= ' ' . $OUTPUT->help_icon($identifier, $component);
 413             }
 414
 415             $group[] = $mform->createElement('checkbox', $field . $whenname, '', $label);
 416         }
 417         $mform->addGroup($group, $whenname . 'optionsgrp',
 418                 get_string('review' . $whenname, 'quiz'), null, false);
 419
 420         foreach (self::$reviewfields as $field => $notused) {
 421             $cfgfield = 'review' . $field;
 422             if ($quizconfig->$cfgfield & $when) {
 423                 $mform->setDefault($field . $whenname, 1);
 424             } else {
 425                 $mform->setDefault($field . $whenname, 0);
 426             }
 427         }
 428
 429         if ($whenname != 'during') {
 430             $mform->disabledIf('correctness' . $whenname, 'attempt' . $whenname);
 431             $mform->disabledIf('specificfeedback' . $whenname, 'attempt' . $whenname);
 432             $mform->disabledIf('generalfeedback' . $whenname, 'attempt' . $whenname);
 433             $mform->disabledIf('rightanswer' . $whenname, 'attempt' . $whenname);
 434         }
 435     }
 436
 437     protected function preprocessing_review_settings(&$toform, $whenname, $when) {
 438         foreach (self::$reviewfields as $field => $notused) {
 439             $fieldname = 'review' . $field;
 440             if (array_key_exists($fieldname, $toform)) {
 441                 $toform[$field . $whenname] = $toform[$fieldname] & $when;
 442             }
 443         }
 444     }
 445
 446     public function data_preprocessing(&$toform) {
 447         if (isset($toform['grade'])) {
 448             // Convert to a real number, so we don't get 0.0000.
 449             $toform['grade'] = $toform['grade'] + 0;
 450         }
 451
 452         if (count($this->_feedbacks)) {
 453             $key = 0;
 454             foreach ($this->_feedbacks as $feedback) {
 455                 $draftid = file_get_submitted_draft_itemid('feedbacktext['.$key.']');
 456                 $toform['feedbacktext['.$key.']']['text'] = file_prepare_draft_area(
 457                     $draftid,               // Draftid.
 458                     $this->context->id,     // Context.
 459                     'mod_quiz',             // Component.
 460                     'feedback',             // Filarea.
 461                     !empty($feedback->id) ? (int) $feedback->id : null, // Itemid.
 462                     null,
 463                     $feedback->feedbacktext // Text.
 464                 );
 465                 $toform['feedbacktext['.$key.']']['format'] = $feedback->feedbacktextformat;
 466                 $toform['feedbacktext['.$key.']']['itemid'] = $draftid;
 467
 468                 if ($toform['grade'] == 0) {
 469                     // When a quiz is un-graded, there can only be one lot of
 470                     // feedback. If the quiz previously had a maximum grade and
 471                     // several lots of feedback, we must now avoid putting text
 472                     // into input boxes that are disabled, but which the
 473                     // validation will insist are blank.
 474                     break;
 475                 }
 476
 477                 if ($feedback->mingrade > 0) {
 478                     $toform['feedbackboundaries['.$key.']'] =
 479                             round(100.0 * $feedback->mingrade / $toform['grade'], 6) . '%';
 480                 }
 481                 $key++;
 482             }
 483         }
 484
 485         if (isset($toform['timelimit'])) {
 486             $toform['timelimitenable'] = $toform['timelimit'] > 0;
 487         }
 488
 489         $this->preprocessing_review_settings($toform, 'during',
 490                 mod_quiz_display_options::DURING);
 491         $this->preprocessing_review_settings($toform, 'immediately',
 492                 mod_quiz_display_options::IMMEDIATELY_AFTER);
 493         $this->preprocessing_review_settings($toform, 'open',
 494                 mod_quiz_display_options::LATER_WHILE_OPEN);
 495         $this->preprocessing_review_settings($toform, 'closed',
 496                 mod_quiz_display_options::AFTER_CLOSE);
 497         $toform['attemptduring'] = true;
 498         $toform['overallfeedbackduring'] = false;
 499
 500         // Password field - different in form to stop browsers that remember
 501         // passwords from getting confused.
 502         if (isset($toform['password'])) {
 503             $toform['quizpassword'] = $toform['password'];
 504             unset($toform['password']);
 505         }
 506
 507         // Load any settings belonging to the access rules.
 508         if (!empty($toform['instance'])) {
 509             $accesssettings = quiz_access_manager::load_settings($toform['instance']);
 510             foreach ($accesssettings as $name => $value) {
 511                 $toform[$name] = $value;
 512             }
 513         }
 514     }
 515
 516     public function validation($data, $files) {
 517         $errors = parent::validation($data, $files);
 518
 519         // Check open and close times are consistent.
 520         if ($data['timeopen'] != 0 && $data['timeclose'] != 0 &&
 521                 $data['timeclose'] < $data['timeopen']) {
 522             $errors['timeclose'] = get_string('closebeforeopen', 'quiz');
 523         }
 524
 525         // Check that the grace period is not too short.
 526         if ($data['overduehandling'] == 'graceperiod') {
 527             $graceperiodmin = get_config('quiz', 'graceperiodmin');
 528             if ($data['graceperiod'] <= $graceperiodmin) {
 529                 $errors['graceperiod'] = get_string('graceperiodtoosmall', 'quiz', format_time($graceperiodmin));
 530             }
 531         }
 532
 533         // Check the boundary value is a number or a percentage, and in range.
 534         $i = 0;
 535         while (!empty($data['feedbackboundaries'][$i] )) {
 536             $boundary = trim($data['feedbackboundaries'][$i]);
 537             if (strlen($boundary) > 0) {
 538                 if ($boundary[strlen($boundary) - 1] == '%') {
 539                     $boundary = trim(substr($boundary, 0, -1));
 540                     if (is_numeric($boundary)) {
 541                         $boundary = $boundary * $data['grade'] / 100.0;
 542                     } else {
 543                         $errors["feedbackboundaries[$i]"] =
 544                                 get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 545                     }
 546                 } else if (!is_numeric($boundary)) {
 547                     $errors["feedbackboundaries[$i]"] =
 548                             get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 549                 }
 550             }
 551             if (is_numeric($boundary) && $boundary <= 0 || $boundary >= $data['grade'] ) {
 552                 $errors["feedbackboundaries[$i]"] =
 553                         get_string('feedbackerrorboundaryoutofrange', 'quiz', $i + 1);
 554             }
 555             if (is_numeric($boundary) && $i > 0 &&
 556                     $boundary >= $data['feedbackboundaries'][$i - 1]) {
 557                 $errors["feedbackboundaries[$i]"] =
 558                         get_string('feedbackerrororder', 'quiz', $i + 1);
 559             }
 560             $data['feedbackboundaries'][$i] = $boundary;
 561             $i += 1;
 562         }
 563         $numboundaries = $i;
 564
 565         // Check there is nothing in the remaining unused fields.
 566         if (!empty($data['feedbackboundaries'])) {
 567             for ($i = $numboundaries; $i < count($data['feedbackboundaries']); $i += 1) {
 568                 if (!empty($data['feedbackboundaries'][$i] ) &&
 569                         trim($data['feedbackboundaries'][$i] ) != '') {
 570                     $errors["feedbackboundaries[$i]"] =
 571                             get_string('feedbackerrorjunkinboundary', 'quiz', $i + 1);
 572                 }
 573             }
 574         }
 575         for ($i = $numboundaries + 1; $i < count($data['feedbacktext']); $i += 1) {
 576             if (!empty($data['feedbacktext'][$i]['text']) &&
 577                     trim($data['feedbacktext'][$i]['text'] ) != '') {
 578                 $errors["feedbacktext[$i]"] =
 579                         get_string('feedbackerrorjunkinfeedback', 'quiz', $i + 1);
 580             }
 581         }
 582
 583         // Any other rule plugins.
 584         $errors = quiz_access_manager::validate_settings_form_fields($errors, $data, $files, $this);
 585
 586         return $errors;
 587     }
 588
 589     /**
 590      * Display module-specific activity completion rules.
 591      * Part of the API defined by moodleform_mod
 592      * @return array Array of string IDs of added items, empty array if none
 593      */
 594     public function add_completion_rules() {
 595         $mform = $this->_form;
 596         $items = array();
 597
 598         $group = array();
 599         $group[] = $mform->createElement('advcheckbox', 'completionpass', null, get_string('completionpass', 'quiz'),
 600                 array('group' => 'cpass'));
 601
 602         $group[] = $mform->createElement('advcheckbox', 'completionattemptsexhausted', null,
 603                 get_string('completionattemptsexhausted', 'quiz'),
 604                 array('group' => 'cattempts'));
 605         $mform->disabledIf('completionattemptsexhausted', 'completionpass', 'notchecked');
 606         $mform->addGroup($group, 'completionpassgroup', get_string('completionpass', 'quiz'), ' &nbsp; ', false);
 607         $mform->addHelpButton('completionpassgroup', 'completionpass', 'quiz');
 608         $items[] = 'completionpassgroup';
 609         return $items;
 610     }
 611
 612     /**
 613      * Called during validation. Indicates whether a module-specific completion rule is selected.
 614      *
 615      * @param array $data Input data (not yet validated)
 616      * @return bool True if one or more rules is enabled, false if none are.
 617      */
 618     public function completion_rule_enabled($data) {
 619         return !empty($data['completionattemptsexhausted']) || !empty($data['completionpass']);
 620     }
 621
 622     /**
 623      * Get the maximum number of attempts that anyone might have due to a user
 624      * or group override. Used to decide whether disabledIf rules should be applied.
 625      * @return int the number of attempts allowed. For the purpose of this method,
 626      * unlimited is returned as 1000, not 0.
 627      */
 628     public function get_max_attempts_for_any_override() {
 629         global $DB;
 630
 631         if (empty($this->_instance)) {
 632             // Quiz not created yet, so no overrides.
 633             return 1;
 634         }
 635
 636         if ($this->maxattemptsanyoverride === null) {
 637             $this->maxattemptsanyoverride = $DB->get_field_sql("
 638                     SELECT MAX(CASE WHEN attempts = 0 THEN 1000 ELSE attempts END)
 639                       FROM {quiz_overrides}
 640                      WHERE quiz = ?",
 641                     array($this->_instance));
 642             if ($this->maxattemptsanyoverride < 1) {
 643                 // This happens when no override alters the number of attempts.
 644                 $this->maxattemptsanyoverride = 1;
 645             }
 646         }
 647
 648         return $this->maxattemptsanyoverride;
 649     }
 650 }