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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * Serve Issuer JSON for related badge or default Issuer if no badge is defined.
  19   *
  20   * @package    core
  21   * @subpackage badges
  22   * @copyright  2020 Sara Arjona <sara@moodle.com>
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   */
  25  define('AJAX_SCRIPT', true);
  26  define('NO_MOODLE_COOKIES', true); // No need for a session here.
  27  
  28  require_once(__DIR__ . '/../config.php');
  29  require_once($CFG->libdir . '/badgeslib.php');
  30  
  31  
  32  $id = optional_param('id', null, PARAM_INT);
  33  // OB specification version. If it's not defined, the site will be used as default.
  34  $obversion = optional_param('obversion', badges_open_badges_backpack_api(), PARAM_INT);
  35  
  36  if (empty($id)) {
  37      // Get the default issuer for this site.
  38      $json = badges_get_default_issuer();
  39  } else {
  40      // Get the issuer for this badge.
  41      $badge = new badge($id);
  42      if ($badge->status != BADGE_STATUS_INACTIVE) {
  43          $json = $badge->get_badge_issuer($obversion);
  44      } else {
  45          // The badge doen't exist or not accessible for the users.
  46          header("HTTP/1.0 410 Gone");
  47          $badgeurl = new moodle_url('/badges/issuer_json.php', array('id' => $id));
  48          $json = ['id' => $badgeurl->out()];
  49          $json['error'] = get_string('error:relatedbadgedoesntexist', 'badges');
  50      }
  51  }
  52  
  53  echo $OUTPUT->header();
  54  echo json_encode($json);