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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   * Special settings for auth_shibboleth WAYF.
  19   *
  20   * @package    auth_shibboleth
  21   * @copyright  2017 Stephen Bourget
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  defined('MOODLE_INTERNAL') || die();
  26  
  27  /**
  28   * Special settings for auth_shibboleth WAYF.
  29   *
  30   * @package    auth_shibboleth
  31   * @copyright  2017 Stephen Bourget
  32   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  33   */
  34  class auth_shibboleth_admin_setting_special_wayf_select extends admin_setting_configselect {
  35  
  36      /**
  37       * Calls parent::__construct with specific arguments.
  38       */
  39      public function __construct() {
  40          $yesno = array();
  41          $yesno['off'] = new lang_string('no');
  42          $yesno['on'] = new lang_string('yes');
  43          parent::__construct('auth_shibboleth/alt_login',
  44                  new lang_string('auth_shib_integrated_wayf', 'auth_shibboleth'),
  45                  new lang_string('auth_shib_integrated_wayf_description', 'auth_shibboleth'),
  46                  'off',
  47                  $yesno);
  48      }
  49  
  50      /**
  51       * We need to overwrite the global "alternate login url" setting if wayf is enabled.
  52       *
  53       * @param string $data Form data.
  54       * @return string Empty when no errors.
  55       */
  56      public function write_setting($data) {
  57          global $CFG;
  58  
  59          // Overwrite alternative login URL if integrated WAYF is used.
  60          if (isset($data) && $data == 'on') {
  61              set_config('alt_login', $data, 'auth_shibboleth');
  62              set_config('alternateloginurl', $CFG->wwwroot.'/auth/shibboleth/login.php');
  63          } else {
  64              // Check if integrated WAYF was enabled and is now turned off.
  65              // If it was and only then, reset the Moodle alternate URL.
  66              $oldsetting = get_config('auth_shibboleth', 'alt_login');
  67              if (isset($oldsetting) and $oldsetting == 'on') {
  68                  set_config('alt_login', 'off', 'auth_shibboleth');
  69                  set_config('alternateloginurl', '');
  70              }
  71              $data = 'off';
  72          }
  73          return parent::write_setting($data);
  74      }
  75  }