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view.php
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view.php
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<?php
// This file is part of 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/>.
/**
* Prints an instance of mod_ilddigitalcert.
*
* @package mod_ilddigitalcert
* @copyright 2020 ILD TH Lübeck <[email protected]>
* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
*/
require_once(__DIR__ . '/../../config.php');
require_once(__DIR__ . '/lib.php');
require_once('locallib.php');
use mod_ilddigitalcert\bcert\certificate;
$id = required_param('id', PARAM_INT);
$view = optional_param('view', 'html', PARAM_RAW);
$issuedid = optional_param('issuedid', 0, PARAM_INT);
$download = optional_param('download', 'json', PARAM_RAW);
$ueid = optional_param('ueid', 0, PARAM_INT);
if ($id) {
$cm = get_coursemodule_from_id('ilddigitalcert', $id, 0, false, MUST_EXIST);
$course = $DB->get_record('course', array('id' => $cm->course), '*', MUST_EXIST);
$moduleinstance = $DB->get_record('ilddigitalcert', array('id' => $cm->instance), '*', MUST_EXIST);
} else {
throw new moodle_exception(get_string('missingidandcmid', 'mod_ilddigitalcert'));
}
require_login($course, true, $cm);
$modulecontext = context_module::instance($cm->id);
if (isguestuser()) {
redirect($CFG->wwwroot . '/login/');
}
// Wenn parameter $ueid aus overview.php übergeben ist kein kurslogin nötig um alte zertifikate auch zu sehen.
if ($ueid == 0) {
$PAGE->set_url('/mod/ilddigitalcert/view.php', array('id' => $cm->id));
} else {
$PAGE->set_url('/mod/ilddigitalcert/view.php', array('id' => $cm->id, 'ueid' => $ueid));
$PAGE->set_pagelayout('admin');
}
$PAGE->set_title(format_string($moduleinstance->name));
$PAGE->set_heading(format_string($course->fullname));
$PAGE->set_context($modulecontext);
// Zertifikat ansehen als Teacher/certifier.
if ($issuedid > 0 and has_capability('moodle/grade:viewall', context_course::instance($course->id))) {
$issuedcertificate = $DB->get_record('ilddigitalcert_issued', array('id' => $issuedid));
$metacertificate = certificate::from_ob($issuedcertificate->metadata);
if ($view == 'download') {
create_certificate_files($issuedcertificate, $metacertificate);
$url = new moodle_url(
'/mod/ilddigitalcert/download.php',
array('icid' => $issuedcertificate->id, 'cmid' => $cm->id, 'download' => $download)
);
redirect($url);
}
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('pluginname', 'mod_ilddigitalcert'));
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/view.php',
array('id' => $id, 'issuedid' => $issuedid, 'view' => 'html', 'ueid' => $ueid)
),
get_string('html', 'mod_ilddigitalcert')
);
echo ' | ';
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/view.php',
array('id' => $id, 'issuedid' => $issuedid, 'view' => 'data', 'ueid' => $ueid)
),
get_string('data', 'mod_ilddigitalcert')
);
if (isset($issuedcertificate->txhash)) {
// Create certificate files, that can be downloaded.
create_certificate_files($issuedcertificate, $metacertificate);
echo '<br />' . get_string('download') . ': ';
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/view.php',
array('id' => $id, 'issuedid' => $issuedid, 'view' => 'download', 'ueid' => $ueid)
),
get_string('json', 'mod_ilddigitalcert'));
if (isset($issuedcertificate->edci)) {
echo ' | ';
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/view.php',
array('id' => $id, 'issuedid' => $issuedid, 'view' => 'download', 'download' => 'edci', 'ueid' => $ueid)
),
get_string('edci', 'mod_ilddigitalcert'));
}
$pdf = true; // TODO in die Settings!
if ($pdf) {
echo ' | ';
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/view.php',
array('id' => $id, 'issuedid' => $issuedid, 'view' => 'download', 'download' => 'pdf', 'ueid' => $ueid)
),
get_string('pdf', 'mod_ilddigitalcert')
);
}
if (
'0' != get_config('mod_ilddigitalcert', 'dchost') and
'0' != get_config('mod_ilddigitalcert', 'dcxapikey')
) {
echo ' | ';
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/send_to_wallet.php',
array('id' => $cm->id)
),
get_string('send_to_wallet', 'mod_ilddigitalcert')
);
}
}
// TODO Zertifikat anzeigen!
if ($view == 'data') {
echo '<div><p>';
display_metadata($metacertificate->get_ob(false));
echo '</p></div>';
} else if ($view == 'html') {
echo '<div id="zertifikat-page" style="border: 0px solid #bfbfbf;margin: 20px 0px;max-width: 800px;">';
echo get_certificatehtml($cm->instance, $metacertificate->get_ob());
echo '</div>';
if (isset($issuedcertificate->txhash)) {
// QR-Code anzeigen.
echo '<br />';
echo '<h3>' . get_string('verify_authenticity', 'mod_ilddigitalcert') . '</h3>';
$salt = get_token($issuedcertificate->institution_token);
$hash = $metacertificate->get_ob_hash($salt);
$url = new moodle_url('/mod/ilddigitalcert/verify.php', array('hash' => $hash));
$img = '<img src="https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=' . $url . '&choe=UTF-8"
title="' . get_string('verify_authenticity', 'mod_ilddigitalcert') . '" />';
echo html_writer::link($url, $img);
}
}
echo '<p>';
echo html_writer::link($CFG->wwwroot . '/mod/ilddigitalcert/view.php?id=' . $id . '&ueid=' . $ueid, get_string('back'));
echo '</p>';
echo $OUTPUT->footer();
$event = \mod_ilddigitalcert\event\certificate_viewed::create(
array('context' => $modulecontext,
'objectid' => $issuedcertificate->id,
'relateduserid' => $USER->id)
);
$event->trigger();
} else if (has_capability('moodle/grade:viewall', context_course::instance($course->id)) and $view == 'preview') {
// Vorschau anzeigen.
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('pluginname', 'mod_ilddigitalcert'));
echo '<p>' . get_string('preview', 'mod_ilddigitalcert') . ' "' . $moduleinstance->name . '"</p>';
echo '<div id="zertifikat-page" style="border: 0px solid #bfbfbf;margin: 20px 0px;max-width: 800px;">';
echo get_certificatehtml($cm->instance, certificate::new($cm, $USER)->get_ob());
echo '</div>';
echo '<p>' . html_writer::link(
new moodle_url('/mod/ilddigitalcert/view.php', array('id' => $id, 'ueid' => $ueid)),
get_string('back')
) . '</p>';
echo $OUTPUT->footer();
} else if (has_capability('moodle/grade:viewall', context_course::instance($course->id)) and $view = 'html') {
// TODO elseif (has_capability('moodle/grade:viewall', context_course::instance($course->id)) and $view == 'issue_teacher')//!
// Zertifikatsübersicht als Teacher/certifier.
redirect(new moodle_url('/mod/ilddigitalcert/overview.php', array('id' => $cm->id, 'ueid' => $ueid)));
} else {
// TODO unterscheiden ob $ueid (dann neue Funtktion get_issued_certificate) oder aktuelles enrolment!
// View Certificate as student.
if ($ueid == 0) {
$certmetadatajson = issue_certificate(certificate::new($cm, $USER), $cm);
} else {
$certmetadatajson = get_issued_certificate($USER->id, $cm->id, $ueid);
}
if (!$certmetadatajson) {
throw new moodle_exception(
'found_no_issued_certificate',
'mod_ilddigitalcert',
new moodle_url(
'/mod/ilddigitalcert/course/view.php',
array('id' => $courseid, 'ueid' => $ueid)
)
);
}
$issuedcertificate = $DB->get_record('ilddigitalcert_issued', array('userid' => $USER->id, 'cmid' => $cm->id));
$metacertificate = certificate::from_ob($certmetadatajson);
// Download only if certificcate is registerd in the blockchain.
if ($view == 'download' and isset($issuedcertificate->txhash)) {
create_certificate_files($issuedcertificate, $metacertificate);
// TODO check what happens when content is changing.
$url = new moodle_url(
'/mod/ilddigitalcert/download.php',
array('icid' => $issuedcertificate->id, 'cmid' => $cm->id, 'download' => $download)
);
redirect($url);
}
echo $OUTPUT->header();
echo $OUTPUT->heading(get_string('pluginname', 'mod_ilddigitalcert'));
// TODO only show if already in blockchain, else:...
if (!isset($issuedcertificate->txhash)) {
\core\notification::info(get_string('cert_waiting_for_registration', 'mod_ilddigitalcert'));
}
echo html_writer::link(
new moodle_url('/mod/ilddigitalcert/view.php?id=' . $id . '&view=html&ueid=' . $ueid),
get_string('html', 'mod_ilddigitalcert')
);
echo ' | ';
echo html_writer::link(
new moodle_url('/mod/ilddigitalcert/view.php?id=' . $id . '&view=data&ueid=' . $ueid),
get_string('data', 'mod_ilddigitalcert')
);
if (isset($issuedcertificate->txhash)) {
// Create certificate files, that can be downloaded.
create_certificate_files($issuedcertificate, $metacertificate);
echo '<br />' . get_string('download') . ': ';
$pdf = true; // TODO Add the option to disable the pdf download in the settings.
if ($pdf) {
echo html_writer::link(
new moodle_url('/mod/ilddigitalcert/view.php?id=' . $id . '&view=download&download=pdf&ueid=' . $ueid),
get_string('pdf', 'mod_ilddigitalcert')
);
}
if (
'0' != get_config('mod_ilddigitalcert', 'dchost') and
'0' != get_config('mod_ilddigitalcert', 'dcxapikey')
) {
create_certificate_files($issuedcertificate, $metacertificate);
echo ' | ';
echo html_writer::link(
new moodle_url(
'/mod/ilddigitalcert/send_to_wallet.php?id=' . $cm->id
),
get_string('send_to_wallet', 'mod_ilddigitalcert')
);
}
}
if ($view == 'data') {
echo '<div><p>';
display_metadata($metacertificate->get_ob(false));
echo '</p></div>';
} else if ($view == 'html') {
echo '<div id="zertifikat-page" style="border: 0px solid #bfbfbf;margin: 20px 0px;max-width: 800px;">';
echo get_certificatehtml($cm->instance, $metacertificate->get_ob());
echo '</div>';
if (isset($issuedcertificate->txhash)) {
// Show QR-Code.
echo '<br />';
echo '<h3>' . get_string('verify_authenticity', 'mod_ilddigitalcert') . '</h3>';
$salt = get_token($issuedcertificate->institution_token);
$hash = $metacertificate->get_ob_hash($salt);
$url = new moodle_url('/mod/ilddigitalcert/verify.php', array('hash' => $hash));
$img = '<img src="https://chart.googleapis.com/chart?chs=300x300&cht=qr&chl=' .
$url . '&choe=UTF-8" title="' . get_string('verify_authenticity', 'mod_ilddigitalcert') . '" />';
echo html_writer::link($url, $img);
}
}
echo $OUTPUT->footer();
$event = \mod_ilddigitalcert\event\certificate_viewed::create(
array('context' => $modulecontext,
'objectid' => $issuedcertificate->id,
'relateduserid' => $USER->id)
);
$event->trigger();
}