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         // Questions per page.
 165         $pageoptions = array();
 166         $pageoptions[0] = get_string('neverallononepage', 'quiz');
 167         $pageoptions[1] = get_string('everyquestion', 'quiz');
 168         for ($i = 2; $i <= QUIZ_MAX_QPP_OPTION; ++$i) {
 169             $pageoptions[$i] = get_string('everynquestions', 'quiz', $i);
 170         }
 171
 172         $pagegroup = array();
 173         $pagegroup[] = $mform->createElement('select', 'questionsperpage',
 174                 get_string('newpage', 'quiz'), $pageoptions, array('id' => 'id_questionsperpage'));
 175         $mform->setDefault('questionsperpage', $quizconfig->questionsperpage);
 176
 177         if (!empty($this->_cm)) {
 178             $pagegroup[] = $mform->createElement('checkbox', 'repaginatenow', '',
 179                     get_string('repaginatenow', 'quiz'), array('id' => 'id_repaginatenow'));
 180             $mform->disabledIf('repaginatenow', 'shufflequestions', 'eq', 1);
 181
 182             $PAGE->requires->js('/question/qengine.js');
 183             $module = array(
 184                 'name'      => 'mod_quiz_edit',
 185                 'fullpath'  => '/mod/quiz/edit.js',
 186                 'requires'  => array('yui2-dom', 'yui2-event', 'yui2-container'),
 187                 'strings'   => array(),
 188                 'async'     => false,
 189             );
 190             $PAGE->requires->js_init_call('quiz_settings_init', null, false, $module);
 191         }
 192
 193         $mform->addGroup($pagegroup, 'questionsperpagegrp',
 194                 get_string('newpage', 'quiz'), null, false);
 195         $mform->addHelpButton('questionsperpagegrp', 'newpage', 'quiz');
 196         $mform->setAdvanced('questionsperpagegrp', $quizconfig->questionsperpage_adv);
 197
 198         // Navigation method.
 199         $mform->addElement('select', 'navmethod', get_string('navmethod', 'quiz'),
 200                 quiz_get_navigation_options());
 201         $mform->addHelpButton('navmethod', 'navmethod', 'quiz');
 202         $mform->setAdvanced('navmethod', $quizconfig->navmethod_adv);
 203         $mform->setDefault('navmethod', $quizconfig->navmethod);
 204
 205         // -------------------------------------------------------------------------------
 206         $mform->addElement('header', 'interactionhdr', get_string('questionbehaviour', 'quiz'));
 207
 208         // Shuffle within questions.
 209         $mform->addElement('selectyesno', 'shuffleanswers', get_string('shufflewithin', 'quiz'));
 210         $mform->addHelpButton('shuffleanswers', 'shufflewithin', 'quiz');
 211         $mform->setAdvanced('shuffleanswers', $quizconfig->shuffleanswers_adv);
 212         $mform->setDefault('shuffleanswers', $quizconfig->shuffleanswers);
 213
 214         // How questions behave (question behaviour).
 215         if (!empty($this->current->preferredbehaviour)) {
 216             $currentbehaviour = $this->current->preferredbehaviour;
 217         } else {
 218             $currentbehaviour = '';
 219         }
 220         $behaviours = question_engine::get_behaviour_options($currentbehaviour);
 221         $mform->addElement('select', 'preferredbehaviour',
 222                 get_string('howquestionsbehave', 'question'), $behaviours);
 223         $mform->addHelpButton('preferredbehaviour', 'howquestionsbehave', 'question');
 224         $mform->setDefault('preferredbehaviour', $quizconfig->preferredbehaviour);
 225
 226         // Each attempt builds on last.
 227         $mform->addElement('selectyesno', 'attemptonlast',
 228                 get_string('eachattemptbuildsonthelast', 'quiz'));
 229         $mform->addHelpButton('attemptonlast', 'eachattemptbuildsonthelast', 'quiz');
 230         $mform->setAdvanced('attemptonlast', $quizconfig->attemptonlast_adv);
 231         $mform->setDefault('attemptonlast', $quizconfig->attemptonlast);
 232         if ($this->get_max_attempts_for_any_override() < 2) {
 233             $mform->disabledIf('attemptonlast', 'attempts', 'eq', 1);
 234         }
 235
 236         // -------------------------------------------------------------------------------
 237         $mform->addElement('header', 'reviewoptionshdr',
 238                 get_string('reviewoptionsheading', 'quiz'));
 239         $mform->addHelpButton('reviewoptionshdr', 'reviewoptionsheading', 'quiz');
 240
 241         // Review options.
 242         $this->add_review_options_group($mform, $quizconfig, 'during',
 243                 mod_quiz_display_options::DURING, true);
 244         $this->add_review_options_group($mform, $quizconfig, 'immediately',
 245                 mod_quiz_display_options::IMMEDIATELY_AFTER);
 246         $this->add_review_options_group($mform, $quizconfig, 'open',
 247                 mod_quiz_display_options::LATER_WHILE_OPEN);
 248         $this->add_review_options_group($mform, $quizconfig, 'closed',
 249                 mod_quiz_display_options::AFTER_CLOSE);
 250
 251         foreach ($behaviours as $behaviour => $notused) {
 252             $unusedoptions = question_engine::get_behaviour_unused_display_options($behaviour);
 253             foreach ($unusedoptions as $unusedoption) {
 254                 $mform->disabledIf($unusedoption . 'during', 'preferredbehaviour',
 255                         'eq', $behaviour);
 256             }
 257         }
 258         $mform->disabledIf('attemptduring', 'preferredbehaviour',
 259                 'neq', 'wontmatch');
 260         $mform->disabledIf('overallfeedbackduring', 'preferredbehaviour',
 261                 'neq', 'wontmatch');
 262
 263         // -------------------------------------------------------------------------------
 264         $mform->addElement('header', 'display', get_string('appearance'));
 265
 266         // Show user picture.
 267         $mform->addElement('select', 'showuserpicture', get_string('showuserpicture', 'quiz'),
 268                 quiz_get_user_image_options());
 269         $mform->addHelpButton('showuserpicture', 'showuserpicture', 'quiz');
 270         $mform->setAdvanced('showuserpicture', $quizconfig->showuserpicture_adv);
 271         $mform->setDefault('showuserpicture', $quizconfig->showuserpicture);
 272
 273         // Overall decimal points.
 274         $options = array();
 275         for ($i = 0; $i <= QUIZ_MAX_DECIMAL_OPTION; $i++) {
 276             $options[$i] = $i;
 277         }
 278         $mform->addElement('select', 'decimalpoints', get_string('decimalplaces', 'quiz'),
 279                 $options);
 280         $mform->addHelpButton('decimalpoints', 'decimalplaces', 'quiz');
 281         $mform->setAdvanced('decimalpoints', $quizconfig->decimalpoints_adv);
 282         $mform->setDefault('decimalpoints', $quizconfig->decimalpoints);
 283
 284         // Question decimal points.
 285         $options = array(-1 => get_string('sameasoverall', 'quiz'));
 286         for ($i = 0; $i <= QUIZ_MAX_Q_DECIMAL_OPTION; $i++) {
 287             $options[$i] = $i;
 288         }
 289         $mform->addElement('select', 'questiondecimalpoints',
 290                 get_string('decimalplacesquestion', 'quiz'), $options);
 291         $mform->addHelpButton('questiondecimalpoints', 'decimalplacesquestion', 'quiz');
 292         $mform->setAdvanced('questiondecimalpoints', $quizconfig->questiondecimalpoints_adv);
 293         $mform->setDefault('questiondecimalpoints', $quizconfig->questiondecimalpoints);
 294
 295         // Show blocks during quiz attempt.
 296         $mform->addElement('selectyesno', 'showblocks', get_string('showblocks', 'quiz'));
 297         $mform->addHelpButton('showblocks', 'showblocks', 'quiz');
 298         $mform->setAdvanced('showblocks', $quizconfig->showblocks_adv);
 299         $mform->setDefault('showblocks', $quizconfig->showblocks);
 300
 301         // -------------------------------------------------------------------------------
 302         $mform->addElement('header', 'security', get_string('extraattemptrestrictions', 'quiz'));
 303
 304         // Require password to begin quiz attempt.
 305         $mform->addElement('passwordunmask', 'quizpassword', get_string('requirepassword', 'quiz'));
 306         $mform->setType('quizpassword', PARAM_TEXT);
 307         $mform->addHelpButton('quizpassword', 'requirepassword', 'quiz');
 308         $mform->setAdvanced('quizpassword', $quizconfig->password_adv);
 309         $mform->setDefault('quizpassword', $quizconfig->password);
 310
 311         // IP address.
 312         $mform->addElement('text', 'subnet', get_string('requiresubnet', 'quiz'));
 313         $mform->setType('subnet', PARAM_TEXT);
 314         $mform->addHelpButton('subnet', 'requiresubnet', 'quiz');
 315         $mform->setAdvanced('subnet', $quizconfig->subnet_adv);
 316         $mform->setDefault('subnet', $quizconfig->subnet);
 317
 318         // Enforced time delay between quiz attempts.
 319         $mform->addElement('duration', 'delay1', get_string('delay1st2nd', 'quiz'),
 320                 array('optional' => true));
 321         $mform->addHelpButton('delay1', 'delay1st2nd', 'quiz');
 322         $mform->setAdvanced('delay1', $quizconfig->delay1_adv);
 323         $mform->setDefault('delay1', $quizconfig->delay1);
 324         if ($this->get_max_attempts_for_any_override() < 2) {
 325             $mform->disabledIf('delay1', 'attempts', 'eq', 1);
 326         }
 327
 328         $mform->addElement('duration', 'delay2', get_string('delaylater', 'quiz'),
 329                 array('optional' => true));
 330         $mform->addHelpButton('delay2', 'delaylater', 'quiz');
 331         $mform->setAdvanced('delay2', $quizconfig->delay2_adv);
 332         $mform->setDefault('delay2', $quizconfig->delay2);
 333         if ($this->get_max_attempts_for_any_override() < 3) {
 334             $mform->disabledIf('delay2', 'attempts', 'eq', 1);
 335             $mform->disabledIf('delay2', 'attempts', 'eq', 2);
 336         }
 337
 338         // Browser security choices.
 339         $mform->addElement('select', 'browsersecurity', get_string('browsersecurity', 'quiz'),
 340                 quiz_access_manager::get_browser_security_choices());
 341         $mform->addHelpButton('browsersecurity', 'browsersecurity', 'quiz');
 342         $mform->setAdvanced('browsersecurity', $quizconfig->browsersecurity_adv);
 343         $mform->setDefault('browsersecurity', $quizconfig->browsersecurity);
 344
 345         // Any other rule plugins.
 346         quiz_access_manager::add_settings_form_fields($this, $mform);
 347
 348         // -------------------------------------------------------------------------------
 349         $mform->addElement('header', 'overallfeedbackhdr', get_string('overallfeedback', 'quiz'));
 350         $mform->addHelpButton('overallfeedbackhdr', 'overallfeedback', 'quiz');
 351
 352         if (isset($this->current->grade)) {
 353             $needwarning = $this->current->grade === 0;
 354         } else {
 355             $needwarning = $quizconfig->maximumgrade == 0;
 356         }
 357         if ($needwarning) {
 358             $mform->addElement('static', 'nogradewarning', '',
 359                     get_string('nogradewarning', 'quiz'));
 360         }
 361
 362         $mform->addElement('static', 'gradeboundarystatic1',
 363                 get_string('gradeboundary', 'quiz'), '100%');
 364
 365         $repeatarray = array();
 366         $repeatedoptions = array();
 367         $repeatarray[] = $mform->createElement('editor', 'feedbacktext',
 368                 get_string('feedback', 'quiz'), array('rows' => 3), array('maxfiles' => EDITOR_UNLIMITED_FILES,
 369                         'noclean' => true, 'context' => $this->context));
 370         $repeatarray[] = $mform->createElement('text', 'feedbackboundaries',
 371                 get_string('gradeboundary', 'quiz'), array('size' => 10));
 372         $repeatedoptions['feedbacktext']['type'] = PARAM_RAW;
 373         $repeatedoptions['feedbackboundaries']['type'] = PARAM_RAW;
 374
 375         if (!empty($this->_instance)) {
 376             $this->_feedbacks = $DB->get_records('quiz_feedback',
 377                     array('quizid' => $this->_instance), 'mingrade DESC');
 378         } else {
 379             $this->_feedbacks = array();
 380         }
 381         $numfeedbacks = max(count($this->_feedbacks) * 1.5, 5);
 382
 383         $nextel = $this->repeat_elements($repeatarray, $numfeedbacks - 1,
 384                 $repeatedoptions, 'boundary_repeats', 'boundary_add_fields', 3,
 385                 get_string('addmoreoverallfeedbacks', 'quiz'), true);
 386
 387         // Put some extra elements in before the button.
 388         $mform->insertElementBefore($mform->createElement('editor',
 389                 "feedbacktext[$nextel]", get_string('feedback', 'quiz'), array('rows' => 3),
 390                 array('maxfiles' => EDITOR_UNLIMITED_FILES, 'noclean' => true,
 391                       'context' => $this->context)),
 392                 'boundary_add_fields');
 393         $mform->insertElementBefore($mform->createElement('static',
 394                 'gradeboundarystatic2', get_string('gradeboundary', 'quiz'), '0%'),
 395                 'boundary_add_fields');
 396
 397         // Add the disabledif rules. We cannot do this using the $repeatoptions parameter to
 398         // repeat_elements because we don't want to dissable the first feedbacktext.
 399         for ($i = 0; $i < $nextel; $i++) {
 400             $mform->disabledIf('feedbackboundaries[' . $i . ']', 'grade', 'eq', 0);
 401             $mform->disabledIf('feedbacktext[' . ($i + 1) . ']', 'grade', 'eq', 0);
 402         }
 403
 404         // -------------------------------------------------------------------------------
 405         $this->standard_coursemodule_elements();
 406
 407         // Check and act on whether setting outcomes is considered an advanced setting.
 408         $mform->setAdvanced('modoutcomes', !empty($quizconfig->outcomes_adv));
 409
 410         // The standard_coursemodule_elements method sets this to 100, but the
 411         // quiz has its own setting, so use that.
 412         $mform->setDefault('grade', $quizconfig->maximumgrade);
 413
 414         // -------------------------------------------------------------------------------
 415         $this->add_action_buttons();
 416     }
 417
 418     protected function add_review_options_group($mform, $quizconfig, $whenname,
 419             $when, $withhelp = false) {
 420         global $OUTPUT;
 421
 422         $group = array();
 423         foreach (self::$reviewfields as $field => $string) {
 424             list($identifier, $component) = $string;
 425
 426             $label = get_string($identifier, $component);
 427             if ($withhelp) {
 428                 $label .= ' ' . $OUTPUT->help_icon($identifier, $component);
 429             }
 430
 431             $group[] = $mform->createElement('checkbox', $field . $whenname, '', $label);
 432         }
 433         $mform->addGroup($group, $whenname . 'optionsgrp',
 434                 get_string('review' . $whenname, 'quiz'), null, false);
 435
 436         foreach (self::$reviewfields as $field => $notused) {
 437             $cfgfield = 'review' . $field;
 438             if ($quizconfig->$cfgfield & $when) {
 439                 $mform->setDefault($field . $whenname, 1);
 440             } else {
 441                 $mform->setDefault($field . $whenname, 0);
 442             }
 443         }
 444
 445         if ($whenname != 'during') {
 446             $mform->disabledIf('correctness' . $whenname, 'attempt' . $whenname);
 447             $mform->disabledIf('specificfeedback' . $whenname, 'attempt' . $whenname);
 448             $mform->disabledIf('generalfeedback' . $whenname, 'attempt' . $whenname);
 449             $mform->disabledIf('rightanswer' . $whenname, 'attempt' . $whenname);
 450         }
 451     }
 452
 453     protected function preprocessing_review_settings(&$toform, $whenname, $when) {
 454         foreach (self::$reviewfields as $field => $notused) {
 455             $fieldname = 'review' . $field;
 456             if (array_key_exists($fieldname, $toform)) {
 457                 $toform[$field . $whenname] = $toform[$fieldname] & $when;
 458             }
 459         }
 460     }
 461
 462     public function data_preprocessing(&$toform) {
 463         if (isset($toform['grade'])) {
 464             // Convert to a real number, so we don't get 0.0000.
 465             $toform['grade'] = $toform['grade'] + 0;
 466         }
 467
 468         if (count($this->_feedbacks)) {
 469             $key = 0;
 470             foreach ($this->_feedbacks as $feedback) {
 471                 $draftid = file_get_submitted_draft_itemid('feedbacktext['.$key.']');
 472                 $toform['feedbacktext['.$key.']']['text'] = file_prepare_draft_area(
 473                     $draftid,               // Draftid.
 474                     $this->context->id,     // Context.
 475                     'mod_quiz',             // Component.
 476                     'feedback',             // Filarea.
 477                     !empty($feedback->id) ? (int) $feedback->id : null, // Itemid.
 478                     null,
 479                     $feedback->feedbacktext // Text.
 480                 );
 481                 $toform['feedbacktext['.$key.']']['format'] = $feedback->feedbacktextformat;
 482                 $toform['feedbacktext['.$key.']']['itemid'] = $draftid;
 483
 484                 if ($toform['grade'] == 0) {
 485                     // When a quiz is un-graded, there can only be one lot of
 486                     // feedback. If the quiz previously had a maximum grade and
 487                     // several lots of feedback, we must now avoid putting text
 488                     // into input boxes that are disabled, but which the
 489                     // validation will insist are blank.
 490                     break;
 491                 }
 492
 493                 if ($feedback->mingrade > 0) {
 494                     $toform['feedbackboundaries['.$key.']'] =
 495                             round(100.0 * $feedback->mingrade / $toform['grade'], 6) . '%';
 496                 }
 497                 $key++;
 498             }
 499         }
 500
 501         if (isset($toform['timelimit'])) {
 502             $toform['timelimitenable'] = $toform['timelimit'] > 0;
 503         }
 504
 505         $this->preprocessing_review_settings($toform, 'during',
 506                 mod_quiz_display_options::DURING);
 507         $this->preprocessing_review_settings($toform, 'immediately',
 508                 mod_quiz_display_options::IMMEDIATELY_AFTER);
 509         $this->preprocessing_review_settings($toform, 'open',
 510                 mod_quiz_display_options::LATER_WHILE_OPEN);
 511         $this->preprocessing_review_settings($toform, 'closed',
 512                 mod_quiz_display_options::AFTER_CLOSE);
 513         $toform['attemptduring'] = true;
 514         $toform['overallfeedbackduring'] = false;
 515
 516         // Password field - different in form to stop browsers that remember
 517         // passwords from getting confused.
 518         if (isset($toform['password'])) {
 519             $toform['quizpassword'] = $toform['password'];
 520             unset($toform['password']);
 521         }
 522
 523         // Load any settings belonging to the access rules.
 524         if (!empty($toform['instance'])) {
 525             $accesssettings = quiz_access_manager::load_settings($toform['instance']);
 526             foreach ($accesssettings as $name => $value) {
 527                 $toform[$name] = $value;
 528             }
 529         }
 530     }
 531
 532     public function validation($data, $files) {
 533         $errors = parent::validation($data, $files);
 534
 535         // Check open and close times are consistent.
 536         if ($data['timeopen'] != 0 && $data['timeclose'] != 0 &&
 537                 $data['timeclose'] < $data['timeopen']) {
 538             $errors['timeclose'] = get_string('closebeforeopen', 'quiz');
 539         }
 540
 541         // Check that the grace period is not too short.
 542         if ($data['overduehandling'] == 'graceperiod') {
 543             $graceperiodmin = get_config('quiz', 'graceperiodmin');
 544             if ($data['graceperiod'] <= $graceperiodmin) {
 545                 $errors['graceperiod'] = get_string('graceperiodtoosmall', 'quiz', format_time($graceperiodmin));
 546             }
 547         }
 548
 549         // Check the boundary value is a number or a percentage, and in range.
 550         $i = 0;
 551         while (!empty($data['feedbackboundaries'][$i] )) {
 552             $boundary = trim($data['feedbackboundaries'][$i]);
 553             if (strlen($boundary) > 0) {
 554                 if ($boundary[strlen($boundary) - 1] == '%') {
 555                     $boundary = trim(substr($boundary, 0, -1));
 556                     if (is_numeric($boundary)) {
 557                         $boundary = $boundary * $data['grade'] / 100.0;
 558                     } else {
 559                         $errors["feedbackboundaries[$i]"] =
 560                                 get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 561                     }
 562                 } else if (!is_numeric($boundary)) {
 563                     $errors["feedbackboundaries[$i]"] =
 564                             get_string('feedbackerrorboundaryformat', 'quiz', $i + 1);
 565                 }
 566             }
 567             if (is_numeric($boundary) && $boundary <= 0 || $boundary >= $data['grade'] ) {
 568                 $errors["feedbackboundaries[$i]"] =
 569                         get_string('feedbackerrorboundaryoutofrange', 'quiz', $i + 1);
 570             }
 571             if (is_numeric($boundary) && $i > 0 &&
 572                     $boundary >= $data['feedbackboundaries'][$i - 1]) {
 573                 $errors["feedbackboundaries[$i]"] =
 574                         get_string('feedbackerrororder', 'quiz', $i + 1);
 575             }
 576             $data['feedbackboundaries'][$i] = $boundary;
 577             $i += 1;
 578         }
 579         $numboundaries = $i;
 580
 581         // Check there is nothing in the remaining unused fields.
 582         if (!empty($data['feedbackboundaries'])) {
 583             for ($i = $numboundaries; $i < count($data['feedbackboundaries']); $i += 1) {
 584                 if (!empty($data['feedbackboundaries'][$i] ) &&
 585                         trim($data['feedbackboundaries'][$i] ) != '') {
 586                     $errors["feedbackboundaries[$i]"] =
 587                             get_string('feedbackerrorjunkinboundary', 'quiz', $i + 1);
 588                 }
 589             }
 590         }
 591         for ($i = $numboundaries + 1; $i < count($data['feedbacktext']); $i += 1) {
 592             if (!empty($data['feedbacktext'][$i]['text']) &&
 593                     trim($data['feedbacktext'][$i]['text'] ) != '') {
 594                 $errors["feedbacktext[$i]"] =
 595                         get_string('feedbackerrorjunkinfeedback', 'quiz', $i + 1);
 596             }
 597         }
 598
 599         // Any other rule plugins.
 600         $errors = quiz_access_manager::validate_settings_form_fields($errors, $data, $files, $this);
 601
 602         return $errors;
 603     }
 604
 605     /**
 606      * Get the maximum number of attempts that anyone might have due to a user
 607      * or group override. Used to decide whether disabledIf rules should be applied.
 608      * @return int the number of attempts allowed. For the purpose of this method,
 609      * unlimited is returned as 1000, not 0.
 610      */
 611     public function get_max_attempts_for_any_override() {
 612         global $DB;
 613
 614         if (empty($this->_instance)) {
 615             // Quiz not created yet, so no overrides.
 616             return 1;
 617         }
 618
 619         if ($this->maxattemptsanyoverride === null) {
 620             $this->maxattemptsanyoverride = $DB->get_field_sql("
 621                     SELECT MAX(CASE WHEN attempts = 0 THEN 1000 ELSE attempts END)
 622                       FROM {quiz_overrides}
 623                      WHERE quiz = ?",
 624                     array($this->_instance));
 625             if ($this->maxattemptsanyoverride < 1) {
 626                 // This happens when no override alters the number of attempts.
 627                 $this->maxattemptsanyoverride = 1;
 628             }
 629         }
 630
 631         return $this->maxattemptsanyoverride;
 632     }
 633 }