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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 assertion JSON by unique hash of issued badge
  19   *
  20   * @package    core
  21   * @subpackage badges
  22   * @copyright  2012 onwards Totara Learning Solutions Ltd {@link http://www.totaralms.com/}
  23   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  24   * @author     Yuliya Bozhko <yuliya.bozhko@totaralms.com>
  25   */
  26  
  27  define('AJAX_SCRIPT', true);
  28  define('NO_MOODLE_COOKIES', true); // No need for a session here.
  29  
  30  require_once(__DIR__ . '/../config.php');
  31  
  32  if (empty($CFG->enablebadges)) {
  33      print_error('badgesdisabled', 'badges');
  34  }
  35  
  36  $hash = required_param('b', PARAM_ALPHANUM); // Issued badge unique hash for badge assertion.
  37  $action = optional_param('action', null, PARAM_BOOL); // Generates badge class if true.
  38  
  39  $assertion = new core_badges_assertion($hash);
  40  
  41  if (!is_null($action)) {
  42      // Get badge class or issuer information depending on $action.
  43      $json = ($action) ? $assertion->get_badge_class() : $assertion->get_issuer();
  44  } else {
  45      // Otherwise, get badge assertion.
  46      $json = $assertion->get_badge_assertion();
  47  }
  48  
  49  
  50  echo $OUTPUT->header();
  51  echo json_encode($json);