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93 lines
2.8 KiB
93 lines
2.8 KiB
2 years ago
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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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/**
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* Implementaton of the quizaccess_safebrowser plugin.
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*
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* @package quizaccess
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* @subpackage safebrowser
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* @copyright 2011 The Open University
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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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defined('MOODLE_INTERNAL') || die();
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require_once($CFG->dirroot . '/mod/quiz/accessrule/accessrulebase.php');
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/**
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* A rule representing the safe browser check.
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*
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* @copyright 2009 Oliver Rahs
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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_safebrowser extends quiz_access_rule_base {
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public static function make(quiz $quizobj, $timenow, $canignoretimelimits) {
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if ($quizobj->get_quiz()->browsersecurity !== 'safebrowser') {
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return null;
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}
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return new self($quizobj, $timenow);
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}
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public function prevent_access() {
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if (!$this->check_safe_browser()) {
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return get_string('safebrowsererror', 'quizaccess_safebrowser');
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} else {
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return false;
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}
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}
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public function description() {
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return get_string('safebrowsernotice', 'quizaccess_safebrowser');
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}
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public function setup_attempt_page($page) {
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$page->set_title($this->quizobj->get_course()->shortname . ': ' . $page->title);
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$page->set_cacheable(false);
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$page->set_popup_notification_allowed(false); // Prevent message notifications.
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$page->set_heading($page->title);
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$page->set_pagelayout('secure');
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}
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/**
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* Checks if browser is safe browser
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*
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* @return true, if browser is safe browser else false
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*/
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public function check_safe_browser() {
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return strpos($_SERVER['HTTP_USER_AGENT'], 'SEB') !== false;
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}
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/**
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* @return array key => lang string any choices to add to the quiz Browser
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* security settings menu.
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*/
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public static function get_browser_security_choices() {
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global $CFG;
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if (empty($CFG->enablesafebrowserintegration)) {
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return array();
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}
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return array('safebrowser' =>
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get_string('requiresafeexambrowser', 'quizaccess_safebrowser'));
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}
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}
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