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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   * The library file for the memcache cache store.
  19   *
  20   * This file is part of the memcache cache store, it contains the API for interacting with an instance of the store.
  21   *
  22   * @package    cachestore_memcache
  23   * @copyright  2012 Sam Hemelryk
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  require_once($CFG->dirroot.'/cache/forms.php');
  30  
  31  /**
  32   * Form for adding a memcache instance.
  33   *
  34   * @copyright  2012 Sam Hemelryk
  35   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  36   */
  37  class cachestore_memcache_addinstance_form extends cachestore_addinstance_form {
  38  
  39      /**
  40       * Add the desired form elements.
  41       */
  42      protected function configuration_definition() {
  43          $form = $this->_form;
  44          $form->addElement('textarea', 'servers', get_string('servers', 'cachestore_memcache'), array('cols' => 75, 'rows' => 5));
  45          $form->addHelpButton('servers', 'servers', 'cachestore_memcache');
  46          $form->addRule('servers', get_string('required'), 'required');
  47          $form->setType('servers', PARAM_RAW);
  48  
  49          $form->addElement('text', 'prefix', get_string('prefix', 'cachestore_memcache'),
  50                  array('maxlength' => 5, 'size' => 5));
  51          $form->addHelpButton('prefix', 'prefix', 'cachestore_memcache');
  52          $form->setType('prefix', PARAM_TEXT); // We set to text but we have a rule to limit to alphanumext.
  53          $form->setDefault('prefix', 'mdl_');
  54          $form->addRule('prefix', get_string('prefixinvalid', 'cachestore_memcache'), 'regex', '#^[a-zA-Z0-9\-_]+$#');
  55  
  56          $form->addElement('header', 'clusteredheader', get_string('clustered', 'cachestore_memcache'));
  57  
  58          $form->addElement('checkbox', 'clustered', get_string('clustered', 'cachestore_memcache'));
  59          $form->setDefault('checkbox', false);
  60          $form->addHelpButton('clustered', 'clustered', 'cachestore_memcache');
  61  
  62          $form->addElement('textarea', 'setservers', get_string('setservers', 'cachestore_memcache'),
  63                  array('cols' => 75, 'rows' => 5));
  64          $form->addHelpButton('setservers', 'setservers', 'cachestore_memcache');
  65          $form->disabledIf('setservers', 'clustered');
  66          $form->setType('setservers', PARAM_RAW);
  67      }
  68  
  69      /**
  70       * Perform minimal validation on the settings form.
  71       *
  72       * @param array $data
  73       * @param array $files
  74       */
  75      public function validation($data, $files) {
  76          $errors = parent::validation($data, $files);
  77  
  78          if (isset($data['clustered']) && ($data['clustered'] == 1)) {
  79              // Set servers is required with in cluster mode.
  80              if (!isset($data['setservers'])) {
  81                  $errors['setservers'] = get_string('required');
  82              } else {
  83                  $trimmed = trim($data['setservers']);
  84                  if (empty($trimmed)) {
  85                      $errors['setservers'] = get_string('required');
  86                  }
  87              }
  88  
  89              $validservers = false;
  90              if (isset($data['servers'])) {
  91                  $servers = trim($data['servers']);
  92                  $servers = explode("\n", $servers);
  93                  if (count($servers) === 1) {
  94                      $validservers = true;
  95                  }
  96              }
  97  
  98              if (!$validservers) {
  99                  $errors['servers'] = get_string('serversclusterinvalid', 'cachestore_memcache');
 100              }
 101          }
 102  
 103          return $errors;
 104      }
 105  }