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<?php
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// This file is part of Moodle - http://moodle.org/
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//
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// Moodle is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// Moodle is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
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use mod_quiz\form\preflight_check_form;
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use mod_quiz\local\access_rule_base;
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use mod_quiz\quiz_settings;
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/**
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* A rule implementing the password check.
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*
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* @package quizaccess_password
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* @copyright 2009 Tim Hunt
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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*/
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class quizaccess_password extends access_rule_base {
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public static function make(quiz_settings $quizobj, $timenow, $canignoretimelimits) {
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if (empty($quizobj->get_quiz()->password)) {
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return null;
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}
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return new self($quizobj, $timenow);
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}
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public function description() {
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return get_string('requirepasswordmessage', 'quizaccess_password');
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}
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public function is_preflight_check_required($attemptid) {
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global $SESSION;
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return empty($SESSION->passwordcheckedquizzes[$this->quiz->id]);
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}
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public function add_preflight_check_form_fields(preflight_check_form $quizform,
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MoodleQuickForm $mform, $attemptid) {
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$mform->addElement('header', 'passwordheader', get_string('password'));
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$mform->addElement('static', 'passwordmessage', '',
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get_string('requirepasswordmessage', 'quizaccess_password'));
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// Don't use the 'proper' field name of 'password' since that get's
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// Firefox's password auto-complete over-excited.
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$mform->addElement('passwordunmask', 'quizpassword',
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get_string('quizpassword', 'quizaccess_password'), ['autofocus' => 'true']);
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}
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public function validate_preflight_check($data, $files, $errors, $attemptid) {
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$enteredpassword = $data['quizpassword'];
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if (strcmp($this->quiz->password, $enteredpassword) === 0) {
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return $errors; // Password is OK.
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} else if (isset($this->quiz->extrapasswords)) {
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// Group overrides may have additional passwords.
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foreach ($this->quiz->extrapasswords as $password) {
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if (strcmp($password, $enteredpassword) === 0) {
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return $errors; // Password is OK.
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}
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}
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}
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$errors['quizpassword'] = get_string('passworderror', 'quizaccess_password');
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return $errors;
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}
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public function notify_preflight_check_passed($attemptid) {
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global $SESSION;
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$SESSION->passwordcheckedquizzes[$this->quiz->id] = true;
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}
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public function current_attempt_finished() {
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global $SESSION;
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// Clear the flag in the session that says that the user has already
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// entered the password for this quiz.
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if (!empty($SESSION->passwordcheckedquizzes[$this->quiz->id])) {
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unset($SESSION->passwordcheckedquizzes[$this->quiz->id]);
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}
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}
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}
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