enrol/flatfile/adminlib.php

   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 flatfile settings.
  19  *
  20  * @package    enrol_flatfile
  21  * @copyright  2013 Petr Skoda {@link http://skodak.org}
  22  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23  */
  24
  25 defined('MOODLE_INTERNAL') || die();
  26
  27 require_once("$CFG->libdir/adminlib.php");
  28
  29
  30 /**
  31  * Setting class that stores only non-empty values.
  32  */
  33 class enrol_flatfile_role_setting extends admin_setting_configtext {
  34
  35     public function __construct($role) {
  36         parent::__construct('enrol_flatfile/map_'.$role->id, $role->localname, '', $role->shortname);
  37     }
  38
  39     public function config_read($name) {
  40         $value = parent::config_read($name);
  41         if (is_null($value)) {
  42             // In other settings NULL means we have to ask user for new value,
  43             // here we just ignore missing role mappings.
  44             $value = '';
  45         }
  46         return $value;
  47     }
  48
  49     public function config_write($name, $value) {
  50         if ($value === '') {
  51             // We do not want empty values in config table,
  52             // delete it instead.
  53             $value = null;
  54         }
  55         return parent::config_write($name, $value);
  56     }
  57 }