moodle-local_mycerts/verify_certificate.php

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<?php
// This file is part of the customcert 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.
*
* @package mod_customcert
* @copyright 2017 Mark Nelson <markn@moodle.com>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
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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.
$context = context::instance_by_id($contextid);
// Set up the page.
$pageurl = new moodle_url('/mod/customcert/verify_certificate.php', array('contextid' => $contextid));
// Ok, a certificate was specified.
if ($context->contextlevel != CONTEXT_SYSTEM) {
$cm = get_coursemodule_from_id('customcert', $context->instanceid, 0, false, MUST_EXIST);
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
$customcert = $DB->get_record('customcert', array('id' => $cm->instance), '*', MUST_EXIST);
// Check if we are allowing anyone to verify, if so, no need to check login, or permissions.
if (!$customcert->verifyany) {
// Need to be logged in.
require_login($course, false, $cm);
// Ok, now check the user has the ability to verify certificates.
require_capability('mod/customcert:verifycertificate', $context);
} else {
$PAGE->set_cm($cm, $course);
}
$checkallofsite = false;
} else {
// If the 'verifyallcertificates' is not set and the user does not have the capability 'mod/customcert:verifyallcertificates'
// then show them a message letting them know they can not proceed.
$verifyallcertificates = get_config('customcert', 'verifyallcertificates');
$canverifyallcertificates = has_capability('mod/customcert:verifyallcertificates', $context);
if (!$verifyallcertificates && !$canverifyallcertificates) {
$strheading = get_string('verifycertificate', 'customcert');
$PAGE->navbar->add($strheading);
$PAGE->set_context(context_system::instance());
$PAGE->set_title($strheading);
$PAGE->set_url($pageurl);
echo $OUTPUT->header();
echo $OUTPUT->heading($strheading);
echo $OUTPUT->notification(get_string('cannotverifyallcertificates', 'customcert'));
echo $OUTPUT->footer();
exit();
}
$checkallofsite = true;
}
if ($code) {
$pageurl->param('code', $code);
}
$PAGE->set_url($pageurl);
$PAGE->set_context($context);
$PAGE->set_title(get_string('verifycertificate', 'customcert'));
// The form we are using to verify these codes.
$form = new \mod_customcert\verify_certificate_form($pageurl);
if ($form->get_data()) {
$result = new stdClass();
$result->issues = array();
// Ok, now check if the code is valid.
$userfields = get_all_user_name_fields(true, 'u');
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$sql = "SELECT ci.id, u.id as userid, $userfields, co.id as courseid,
co.fullname as coursefullname, c.name as certificatename, c.verifyany
FROM {customcert} c
JOIN {customcert_issues} ci
ON c.id = ci.customcertid
JOIN {course} co
ON c.course = co.id
JOIN {user} u
ON ci.userid = u.id
WHERE ci.code = :code";
if ($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 {
$sql .= " AND c.id = :customcertid";
$params = ['code' => $code, 'customcertid' => $customcert->id];
}
$sql .= " AND u.deleted = 0";
// It is possible (though unlikely) that there is the same code for issued certificates.
if ($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(get_string('verifycertificate', 'customcert'));
echo $form->display();
if (isset($result)) {
$renderer = $PAGE->get_renderer('mod_customcert');
$result = new \mod_customcert\output\verify_certificate_results($result);
echo $renderer->render($result);
}
echo $OUTPUT->footer();