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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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* Serve assertion JSON by unique hash of issued badge
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*
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* @package core
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* @subpackage badges
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* @copyright 2012 onwards Totara Learning Solutions Ltd {@link http://www.totaralms.com/}
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* @license http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
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* @author Yuliya Bozhko <yuliya.bozhko@totaralms.com>
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*/
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define('AJAX_SCRIPT', true);
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define('NO_MOODLE_COOKIES', true); // No need for a session here.
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require_once(__DIR__ . '/../config.php');
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require_once($CFG->libdir . '/badgeslib.php');
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if (empty($CFG->enablebadges)) {
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throw new \moodle_exception('badgesdisabled', 'badges');
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}
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$hash = required_param('b', PARAM_ALPHANUM); // Issued badge unique hash for badge assertion.
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$action = optional_param('action', null, PARAM_BOOL); // Generates badge class if true.
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// OB specification version. If it's not defined, the site will be used as default.
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$obversion = optional_param('obversion', badges_open_badges_backpack_api(), PARAM_INT);
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$assertion = new core_badges_assertion($hash, $obversion);
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if (!is_null($action)) {
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// Get badge class or issuer information depending on $action.
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$json = ($action) ? $assertion->get_badge_class() : $assertion->get_issuer();
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} else {
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// Otherwise, get badge assertion.
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$column = $DB->sql_compare_text('uniquehash', 255);
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if ($DB->record_exists_sql(sprintf('SELECT * FROM {badge_issued} WHERE %s = ?', $column), array($hash))) {
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$json = $assertion->get_badge_assertion();
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} else { // Revoked badge.
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header("HTTP/1.0 410 Gone");
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$assertion = array();
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if ($obversion >= OPEN_BADGES_V2) {
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$assertionurl = new moodle_url('/badges/assertion.php', array('b' => $hash));
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$assertion['id'] = $assertionurl->out();
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}
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$assertion['revoked'] = true;
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echo json_encode($assertion);
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die();
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}
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}
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echo $OUTPUT->header();
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echo json_encode($json);
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