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80 lines
3.4 KiB
80 lines
3.4 KiB
<?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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* Displays help via AJAX call or in a new page
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*
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* Use {@link core_renderer::help_icon()} or {@link addHelpButton()} to display
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* the help icon.
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*
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* @copyright 2017 Dan Marsden
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* @package mod_attendance
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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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require_once(dirname(__FILE__).'/../../config.php');
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$session = required_param('session', PARAM_INT);
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$session = $DB->get_record('attendance_sessions', array('id' => $session), '*', MUST_EXIST);
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$cm = get_coursemodule_from_instance('attendance', $session->attendanceid);
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require_login($cm->course, $cm);
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$context = context_module::instance($cm->id);
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$capabilities = array('mod/attendance:manageattendances', 'mod/attendance:takeattendances', 'mod/attendance:changeattendances');
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if (!has_any_capability($capabilities, $context)) {
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exit;
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}
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$PAGE->set_url('/mod/attendance/password.php');
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$PAGE->set_pagelayout('popup');
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$PAGE->set_context(context_system::instance());
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$PAGE->set_title(get_string('password', 'attendance'));
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echo $OUTPUT->header();
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echo html_writer::tag('h2', get_string('passwordgrp', 'attendance'));
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echo html_writer::span($session->studentpassword, 'student-password');
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if (isset($session->includeqrcode) && $session->includeqrcode == 1) {
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$qrcodeurl = $CFG->wwwroot . '/mod/attendance/attendance.php?qrpass=' . $session->studentpassword . '&sessid=' . $session->id;
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echo html_writer::tag('h3', get_string('qrcode', 'attendance'));
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// If the local_qrlinks plugin is installed, use it to create the QR code.
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$plugininfos = core_plugin_manager::instance()->get_plugins_of_type('local');
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$qrlinklib = dirname(__FILE__).'/../../local/qrlinks/thirdparty/QrCode/src/QrCode.php';
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if (isset($plugininfos['qrlinks']) && file_exists($qrlinklib)) {
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require_once($qrlinklib);
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$code = new QrCode($qrcodeurl);
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$code->setSize(500);
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echo html_writer::img('data:image/png;base64,' . base64_encode($code->get()));
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} else {
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// Otherwise try using an external API service to create the QR code instead.
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try {
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$qrcode = file_get_contents('https://api.qrserver.com/v1/create-qr-code/?size=500x500&data=' . urlencode($qrcodeurl));
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if ($qrcode === false) {
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echo html_writer::tag('p', get_string('qrcodemissing', 'attendance'));
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} else {
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echo html_writer::img('data:image/png;base64,' . base64_encode($qrcode), get_string('qrcode', 'attendance'));
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echo html_writer::tag('p', get_string('qrcodewarning', 'attendance'));
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}
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} catch (Exception $e) {
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echo html_writer::tag('p', get_string('qrcodemissing', 'attendance'));
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}
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}
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}
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echo $OUTPUT->footer();
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