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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   * File containing the field_value_validators class.
  19   *
  20   * @package    tool_uploaduser
  21   * @copyright  2019 Mathew May
  22   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  23   */
  24  
  25  namespace tool_uploaduser\local;
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  /**
  30   * Field validator class.
  31   *
  32   * @package    tool_uploaduser
  33   * @copyright  2019 Mathew May
  34   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  35   */
  36  class field_value_validators {
  37  
  38      /**
  39       * List of valid and compatible themes.
  40       *
  41       * @return array
  42       */
  43      protected static $themescache;
  44  
  45      /**
  46       * Validates the value provided for the theme field.
  47       *
  48       * @param string $value The value for the theme field.
  49       * @return array Contains the validation status and message.
  50       */
  51      public static function validate_theme($value) {
  52          global $CFG;
  53  
  54          $status = 'normal';
  55          $message = '';
  56  
  57          // Validate if user themes are allowed.
  58          if (!$CFG->allowuserthemes) {
  59              $status = 'warning';
  60              $message = get_string('userthemesnotallowed', 'tool_uploaduser');
  61          } else {
  62              // Cache list of themes if not yet set.
  63              if (!isset(self::$themescache)) {
  64                  self::$themescache = get_list_of_themes();
  65              }
  66  
  67              // Check if we have a valid theme.
  68              if (empty($value)) {
  69                  $status = 'warning';
  70                  $message = get_string('notheme', 'tool_uploaduser');
  71              } else if (!isset(self::$themescache[$value])) {
  72                  $status = 'warning';
  73                  $message = get_string('invalidtheme', 'tool_uploaduser', s($value));
  74              }
  75          }
  76  
  77          return [$status, $message];
  78      }
  79  }