<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2020 Teclib' and contributors.
 *
 * http://glpi-project.org
 *
 * based on GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2003-2014 by the INDEPNET Development Team.
 *
 * ---------------------------------------------------------------------
 *
 * LICENSE
 *
 * This file is part of GLPI.
 *
 * GLPI is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GLPI is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with GLPI. If not, see <http://www.gnu.org/licenses/>.
 * ---------------------------------------------------------------------
 */

if (!defined('GLPI_ROOT')) {
   die("Sorry. You can't access this file directly");
}


/**
 * ITILTemplateMandatoryField Class
 *
 * Predefined fields for ITIL template class
 *
 * @since 9.5.0
**/
abstract class ITILTemplateField extends CommonDBChild {
   static public $itemtype; //to be filled in subclass
   static public $items_id; //to be filled in subclass
   static public $itiltype; //to be filled in subclass

   private $all_fields;

   // From CommonDBTM
   public $dohistory = true;


   function getForbiddenStandardMassiveAction() {

      $forbidden   = parent::getForbiddenStandardMassiveAction();
      $forbidden[] = 'clone';
      $forbidden[] = 'update';
      return $forbidden;
   }


   /**
    * Get fields list
    *
    * @param ITILTemplate $tt ITIL Template
    *
    * @return array
    */
   public function getAllFields(ITILTemplate $tt) {
      $this->all_fields = $tt->getAllowedFieldsNames(true);
      $this->all_fields = array_diff_key($this->all_fields, static::getExcludedFields());
      return $this->all_fields;
   }


   protected function computeFriendlyName() {
      $tt_class = static::$itemtype;
      $tt     = new $tt_class;
      $fields = $tt->getAllowedFieldsNames(true);

      if (isset($fields[$this->fields["num"]])) {
         return $fields[$this->fields["num"]];
      }
      return '';
   }


   static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0) {
      static::showForITILTemplate($item, $withtemplate);
      return true;
   }


   /**
    * Return fields who doesn't need to be used for this part of template
    *
    * @since 9.2
    *
    * @return array the excluded fields (keys and values are equals)
    */
   abstract static function getExcludedFields();


   /**
    * Print the fields
    *
    * @since 0.83
    *
    * @param ITILTemplate $tt           ITIL Template
    * @param boolean      $withtemplate Template or basic item (default 0)
    *
    * @return void
   **/
   abstract static function showForITILTemplate(ITILTemplate $tt, $withtemplate = 0);


   /**
    * Get field num from its name
    *
    * @param ITILTemplate $tt   ITIL Template
    * @param string       $name Field name to look for
    *
    * @return integer|false
    */
   public function getFieldNum(ITILTemplate $tt, $name) {
      if ($this->all_fields === null) {
         $this->getAllFields($tt);
      }
      return array_search($name, $this->all_fields);
   }


   function getItem($getFromDB = true, $getEmpty = true) {
      $item_class = static::$itemtype;
      if ($item_class == 'ITILTemplate') {
         if (isset($this->fields['itiltype'])) {
            $item_class = $this->fields['itiltype'] . 'Template';
         }
         if (isset($this->input['itiltype'])) {
            $item_class = $this->input['itiltype'] . 'Template';
         }
      }

      return $this->getConnexityItem(
         $item_class,
         static::$items_id,
         $getFromDB,
         $getEmpty
      );
   }
}