moodle-mod_htmlcert/verify_certificate.php

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<?php
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// This file is part of the htmlcert module for Moodle - http://moodle.org/
//
// Moodle is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Moodle is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Moodle. If not, see <http://www.gnu.org/licenses/>.
/**
* Handles verifying the code for a certificate.
*
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* @package mod_htmlcert
* @copyright 2017 Mark Nelson <markn@moodle.com>, 2021 Klaus-Uwe Mitterer <kumitterer@kumi.systems>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
// This file does not need require_login because capability to verify can be granted to guests, skip codechecker here.
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// @codingStandardsIgnoreLine
require_once('../../config.php');
$contextid = optional_param('contextid', context_system::instance()->id, PARAM_INT);
$code = optional_param('code', '', PARAM_ALPHANUM); // The code for the certificate we are verifying.
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$qrcode = optional_param('qrcode', false, PARAM_BOOL);
$context = context::instance_by_id($contextid);
// Set up the page.
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$pageurl = new moodle_url('/mod/htmlcert/verify_certificate.php', array('contextid' => $contextid));
if ($code) {
$pageurl->param('code', $code);
}
// Ok, a certificate was specified.
if ($context->contextlevel != CONTEXT_SYSTEM) {
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$cm = get_coursemodule_from_id('htmlcert', $context->instanceid, 0, false, MUST_EXIST);
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
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$htmlcert = $DB->get_record('htmlcert', array('id' => $cm->instance), '*', MUST_EXIST);
// Check if we are allowing anyone to verify, if so, no need to check login, or permissions.
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if (!$htmlcert->verifyany) {
// Need to be logged in.
require_login($course, false, $cm);
// Ok, now check the user has the ability to verify certificates.
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require_capability('mod/htmlcert:verifycertificate', $context);
} else {
$PAGE->set_cm($cm, $course);
}
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$title = $htmlcert->name;
$heading = format_string($title);
$checkallofsite = false;
} else {
$title = $SITE->fullname;
$heading = $title;
$checkallofsite = true;
}
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\mod_htmlcert\page_helper::page_setup($pageurl, $context, $title);
// Additional page setup.
if ($context->contextlevel == CONTEXT_SYSTEM) {
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$PAGE->navbar->add(get_string('verifycertificate', 'htmlcert'));
}
if ($checkallofsite) {
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// If the 'verifyallcertificates' is not set and the user does not have the capability 'mod/htmlcert:verifyallcertificates'
// then show them a message letting them know they can not proceed.
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$verifyallcertificates = get_config('htmlcert', 'verifyallcertificates');
$canverifyallcertificates = has_capability('mod/htmlcert:verifyallcertificates', $context);
if (!$verifyallcertificates && !$canverifyallcertificates) {
echo $OUTPUT->header();
echo $OUTPUT->heading($heading);
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echo $OUTPUT->notification(get_string('cannotverifyallcertificates', 'htmlcert'));
echo $OUTPUT->footer();
exit();
}
}
// The form we are using to verify these codes.
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$form = new \mod_htmlcert\verify_certificate_form($pageurl);
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if ($code) {
$result = new stdClass();
$result->issues = array();
// Ok, now check if the code is valid.
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$userfields = \mod_htmlcert\helper::get_all_user_name_fields('u');
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$sql = "SELECT ci.id, u.id as userid, $userfields, co.id as courseid,
co.fullname as coursefullname, c.id as certificateid,
c.name as certificatename, c.verifyany
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FROM {htmlcert} c
JOIN {htmlcert_issues} ci
ON c.id = ci.htmlcertid
JOIN {course} co
ON c.course = co.id
JOIN {user} u
ON ci.userid = u.id
WHERE ci.code = :code";
if ($checkallofsite) {
// Only people with the capability to verify all the certificates can verify any.
if (!$canverifyallcertificates) {
$sql .= " AND c.verifyany = 1";
}
$params = ['code' => $code];
} else {
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$sql .= " AND c.id = :htmlcertid";
$params = ['code' => $code, 'htmlcertid' => $htmlcert->id];
}
// It is possible (though unlikely) that there is the same code for issued certificates.
if ($issues = $DB->get_records_sql($sql, $params)) {
$result->success = true;
$result->issues = $issues;
} else {
// Can't find it, let's say it's not verified.
$result->success = false;
}
}
echo $OUTPUT->header();
echo $OUTPUT->heading($heading);
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// Don't show the form if we are coming from a QR code.
if (!$qrcode) {
echo $form->display();
}
if (isset($result)) {
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$renderer = $PAGE->get_renderer('mod_htmlcert');
$result = new \mod_htmlcert\output\verify_certificate_results($result);
echo $renderer->render($result);
}
echo $OUTPUT->footer();