<?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 directly to this file");
}

/**
 * ITIL Template class
 *
 * since version 0.83
**/
abstract class ITILTemplate extends CommonDropdown {

   // From CommonDBTM
   public $dohistory                 = true;

   // From CommonDropdown
   public $first_level_menu          = "helpdesk";

   public $display_dropdowntitle     = false;

   static $rightname                 = 'itiltemplate';

   public $can_be_translated            = false;

   // Specific fields
   /// Mandatory Fields
   public $mandatory  = [];
   /// Hidden fields
   public $hidden     = [];
   /// Predefined fields
   public $predefined = [];
   /// Related ITIL type


   /**
    * Retrieve an item from the database with additional datas
    *
    * @since 0.83
    *
    * @param $ID                    integer  ID of the item to get
    * @param $withtypeandcategory   boolean  with type and category (true by default)
    *
    * @return true if succeed else false
   **/
   function getFromDBWithData($ID, $withtypeandcategory = true) {
      if ($this->getFromDB($ID)) {
         $itiltype = str_replace('Template', '', static::getType());
         $itil_object  = new $itiltype;
         $itemstable = $itil_object->getItemsTable();
         $tth_class = $itiltype . 'TemplateHiddenField';
         $tth          = new $tth_class;
         $this->hidden = $tth->getHiddenFields($ID, $withtypeandcategory);

         // Force items_id if itemtype is defined
         if (isset($this->hidden['itemtype'])
             && !isset($this->hidden['items_id'])) {
            $this->hidden['items_id'] = $itil_object->getSearchOptionIDByField('field', 'items_id',
                                                                          $itemstable);
         }
         // Always get all mandatory fields
         $ttm_class = $itiltype . 'TemplateMandatoryField';
         $ttm             = new $ttm_class;
         $this->mandatory = $ttm->getMandatoryFields($ID);

         // Force items_id if itemtype is defined
         if (isset($this->mandatory['itemtype'])
             && !isset($this->mandatory['items_id'])) {
            $this->mandatory['items_id'] = $itil_object->getSearchOptionIDByField('field', 'items_id',
                                                                             $itemstable);
         }

         $ttp_class = $itiltype . 'TemplatePredefinedField';
         $ttp              = new $ttp_class;
         $this->predefined = $ttp->getPredefinedFields($ID, $withtypeandcategory);
         // Compute time_to_resolve
         if (isset($this->predefined['time_to_resolve'])) {
            $this->predefined['time_to_resolve']
                        = Html::computeGenericDateTimeSearch($this->predefined['time_to_resolve'], false);
         }
         if (isset($this->predefined['time_to_own'])) {
            $this->predefined['time_to_own']
                        = Html::computeGenericDateTimeSearch($this->predefined['time_to_own'], false);
         }

         // Compute internal_time_to_resolve
         if (isset($this->predefined['internal_time_to_resolve'])) {
            $this->predefined['internal_time_to_resolve']
               = Html::computeGenericDateTimeSearch($this->predefined['internal_time_to_resolve'], false);
         }
         if (isset($this->predefined['internal_time_to_own'])) {
            $this->predefined['internal_time_to_own']
               = Html::computeGenericDateTimeSearch($this->predefined['internal_time_to_own'], false);
         }

         // Compute date
         if (isset($this->predefined['date'])) {
            $this->predefined['date']
                        = Html::computeGenericDateTimeSearch($this->predefined['date'], false);
         }
         return true;
      }
      return false;
   }


   static function getTypeName($nb = 0) {
      $itiltype = str_replace('Template', '', static::getType());
      //TRANS %1$S is the ITIL type
      return sprintf(
         _n('%1$s template', '%1$s templates', $nb),
         $itiltype::getTypeName()
      );
   }


   /**
    * @param boolean $withtypeandcategory (default 0)
    * @param boolean $withitemtype        (default 0)
   **/
   static function getAllowedFields($withtypeandcategory = 0, $withitemtype = 0) {

      static $allowed_fields = [];

      // For integer value for index
      if ($withtypeandcategory) {
         $withtypeandcategory = 1;
      } else {
         $withtypeandcategory = 0;
      }

      if ($withitemtype) {
         $withitemtype = 1;
      } else {
         $withitemtype = 0;
      }

      if (!isset($allowed_fields[$withtypeandcategory][$withitemtype])) {
         $itiltype = str_replace('Template', '', static::getType());
         $itil_object = new $itiltype;
         $itemstable = $itil_object->getItemsTable();

         // SearchOption ID => name used for options
         $allowed_fields[$withtypeandcategory][$withitemtype] = [
                     $itil_object->getSearchOptionIDByField('field', 'name',
                                                       $itil_object->getTable())   => 'name',
                     $itil_object->getSearchOptionIDByField('field', 'content',
                                                       $itil_object->getTable())   => 'content',
                     $itil_object->getSearchOptionIDByField('field', 'status',
                                                       $itil_object->getTable())   => 'status',
                     $itil_object->getSearchOptionIDByField('field', 'urgency',
                                                       $itil_object->getTable())   => 'urgency',
                     $itil_object->getSearchOptionIDByField('field', 'impact',
                                                       $itil_object->getTable())   => 'impact',
                     $itil_object->getSearchOptionIDByField('field', 'priority',
                                                       $itil_object->getTable())   => 'priority',
                     $itil_object->getSearchOptionIDByField('field', 'date',
                                                       $itil_object->getTable())   => 'date',
                                                       4                 => '_users_id_requester',
                                                       71                => '_groups_id_requester',
                                                       5                 => '_users_id_assign',
                                                       8                 => '_groups_id_assign',
                     $itil_object->getSearchOptionIDByField('field', 'name',
                                                       'glpi_suppliers') => '_suppliers_id_assign',

                                                       66                => '_users_id_observer',
                                                       65                => '_groups_id_observer',
             ];

         if ($withtypeandcategory) {
            $allowed_fields[$withtypeandcategory][$withitemtype]
               [$itil_object->getSearchOptionIDByField('field', 'completename',
                                                  'glpi_itilcategories')]  = 'itilcategories_id';
         }

         if ($withitemtype) {
            $allowed_fields[$withtypeandcategory][$withitemtype]
               [$itil_object->getSearchOptionIDByField('field', 'itemtype',
                                                  $itemstable)] = 'itemtype';
         }

         $allowed_fields[$withtypeandcategory][$withitemtype]
            [$itil_object->getSearchOptionIDByField('field', 'items_id',
                                               $itemstable)] = 'items_id';

         // Add validation request
         $allowed_fields[$withtypeandcategory][$withitemtype][-2] = '_add_validation';

         // Add document
         $allowed_fields[$withtypeandcategory][$withitemtype]
               [$itil_object->getSearchOptionIDByField('field', 'name',
                                                  'glpi_documents')] = '_documents_id';

         // Add ITILTask (from task templates)
         $allowed_fields[$withtypeandcategory][$withitemtype]
               [$itil_object->getSearchOptionIDByField('field', 'name',
                                                  TaskTemplate::getTable())] = '_tasktemplates_id';

         //add specific itil type fields
         $allowed_fields[$withtypeandcategory][$withitemtype] += static::getExtraAllowedFields($withtypeandcategory, $withitemtype);
      }

      return $allowed_fields[$withtypeandcategory][$withitemtype];
   }

   /**
    * Get extra allowed field names that can be used in templates_id
    *
    * @since 9.5.0
    *
    * @param boolean $withtypeandcategory (default 0)
    * @param boolean $withitemtype        (default 0)
    *
    * @return array
    *
    * @see self::getAllowedFields()
    */
   public static function getExtraAllowedFields($withtypeandcategory = 0, $withitemtype = 0) {
      return [];
   }


   /**
    * @param $withtypeandcategory   (default 0)
    * @param $with_items_id         (default 0)
   **/
   function getAllowedFieldsNames($withtypeandcategory = 0, $with_items_id = 0) {

      $itiltype = str_replace('Template', '', static::getType());
      $searchOption = Search::getOptions($itiltype);
      $tab          = $this->getAllowedFields($withtypeandcategory, $with_items_id);
      foreach (array_keys($tab) as $ID) {
         switch ($ID) {
            case -2 :
               $tab[-2] = __('Approval request');
               break;

            case 175 :
               $tab[175] = CommonITILTask::getTypeName();
               break;

            default :
               if (isset($searchOption[$ID]['name'])) {
                  $tab[$ID] = $searchOption[$ID]['name'];
               }
         }
      }

      return $tab;
   }


   /**
    *  ??since version 0.84
   **/
   function getSimplifiedInterfaceFields() {

      $ticket = new Ticket();
      $fields = [$ticket->getSearchOptionIDByField('field', 'name', 'glpi_tickets'),
                      $ticket->getSearchOptionIDByField('field', 'content', 'glpi_tickets'),
                      $ticket->getSearchOptionIDByField('field', 'urgency', 'glpi_tickets'),
                      $ticket->getSearchOptionIDByField('field', 'completename', 'glpi_locations'),
                      $ticket->getSearchOptionIDByField('field', 'itemtype', 'glpi_tickets'),
                      $ticket->getSearchOptionIDByField('field', 'completename',
                                                        'glpi_itilcategories'),
                      $ticket->getSearchOptionIDByField('field', 'type', 'glpi_tickets'),
                      $ticket->getSearchOptionIDByField('field', 'items_id', 'glpi_tickets'),
                      $ticket->getSearchOptionIDByField('field', 'name', 'glpi_documents'),
                      66 // users_id_observer
                      ];
      return $fields;
   }


   function defineTabs($options = []) {
      $ong          = [];
      $this->addDefaultFormTab($ong);
      $itiltype = str_replace('Template', '', static::getType());
      $this->addStandardTab($itiltype . 'TemplateMandatoryField', $ong, $options);
      $this->addStandardTab($itiltype . 'TemplatePredefinedField', $ong, $options);
      $this->addStandardTab($itiltype . 'TemplateHiddenField', $ong, $options);
      $this->addStandardTab($itiltype . 'Template', $ong, $options);
      $this->addStandardTab('ITILCategory', $ong, $options);
      $this->addStandardTab('Log', $ong, $options);

      return $ong;
   }


   static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0) {
      if ($item instanceof ITILTemplate) {
         switch ($tabnum) {
            case 1 :
               $item->showCentralPreview($item);
               return true;
         }
      }
      return false;
   }


   function getTabNameForItem(CommonGLPI $item, $withtemplate = 0) {

      if (Session::haveRight(static::$rightname, READ)) {
         switch ($item->getType()) {
            case 'TicketTemplate':
               return [
                  1 => __('Standard interface'),
                  2 => __('Simplified interface')
               ];
            case 'ChangeTemplate':
            case 'ProblemTemplate':
               return [1 => __('Preview')];
         }
      }
      return '';
   }


   /**
    * Get mandatory mark if field is mandatory
    *
    * @since 0.83
    *
    * @param $field  string   field
    * @param $force  boolean  force display based on global config (false by default)
    *
    * @return string to display
   **/
   function getMandatoryMark($field, $force = false) {

      if ($force || $this->isMandatoryField($field)) {
         return "<span class='required'>*</span>";
      }
      return '';
   }


   /**
    * Get hidden field begin enclosure for text
    *
    * @since 0.83
    *
    * @param $field string field
    *
    * @return string to display
   **/
   function getBeginHiddenFieldText($field) {

      if ($this->isHiddenField($field) && !$this->isPredefinedField($field)) {
         return "<span id='hiddentext$field' style='display:none'>";
      }
      return '';
   }


   /**
    * Get hidden field end enclosure for text
    *
    * @since 0.83
    *
    * @param $field string field
    *
    * @return string to display
   **/
   function getEndHiddenFieldText($field) {

      if ($this->isHiddenField($field) && !$this->isPredefinedField($field)) {
         return "</span>";
      }
      return '';
   }


   /**
    * Get hidden field begin enclosure for value
    *
    * @since 0.83
    *
    * @param $field string field
    *
    * @return string to display
   **/
   function getBeginHiddenFieldValue($field) {

      if ($this->isHiddenField($field)) {
         return "<span id='hiddenvalue$field' style='display:none'>";
      }
      return '';
   }


   /**
    * Get hidden field end enclosure with hidden value
    *
    * @since 0.83
    *
    * @param $field  string   field
    * @param $ticket          ticket object (default NULL)
    *
    * @return string to display
   **/
   function getEndHiddenFieldValue($field, &$ticket = null) {

      $output = '';
      if ($this->isHiddenField($field)) {
         $output .= "</span>";
         if ($ticket && isset($ticket->fields[$field])) {
            $output .= "<input type='hidden' name='$field' value=\"".$ticket->fields[$field]."\">";
         }
         if ($this->isPredefinedField($field)
             && !is_null($ticket)) {
            if ($num = array_search($field, $this->getAllowedFields())) {
               $display_options = ['comments' => true,
                                        'html'     => true];
               $output .= $ticket->getValueToDisplay($num, $ticket->fields[$field], $display_options);

               /// Display items_id
               if ($field == 'itemtype') {
                  $output .= "<input type='hidden' name='items_id' value=\"".
                               $ticket->fields['items_id']."\">";
                  if ($num = array_search('items_id', $this->getAllowedFields())) {
                     $output = sprintf(__('%1$s - %2$s'), $output,
                                       $ticket->getValueToDisplay($num, $ticket->fields,
                                                                  $display_options));
                  }
               }
            }
         }
      }
      return $output;
   }


   /**
    * Is it an hidden field ?
    *
    * @since 0.83
    *
    * @param $field string field
    *
    * @return bool
   **/
   function isHiddenField($field) {

      if (isset($this->hidden[$field])) {
         return true;
      }
      return false;
   }


   /**
    * Is it an predefined field ?
    *
    * @since 0.83
    *
    * @param $field string field
    *
    * @return bool
   **/
   function isPredefinedField($field) {

      if (isset($this->predefined[$field])) {
         return true;
      }
      return false;
   }


   /**
    * Is it an mandatory field ?
    *
    * @since 0.83
    *
    * @param $field string field
    *
    * @return bool
   **/
   function isMandatoryField($field) {

      if (isset($this->mandatory[$field])) {
         return true;
      }
      return false;
   }


   /**
    * Print preview for ITIL template
    *
    * @since 0.83
    *
    * @param $tt ITILTemplate object
    *
    * @return void
   **/
   static function showCentralPreview(ITILTemplate $tt) {

      if (!$tt->getID()) {
         return false;
      }
      if ($tt->getFromDBWithData($tt->getID())) {
         $itiltype = str_replace('Template', '', static::getType());
         $itil_object = new $itiltype;
         $itil_object->showForm(0, ['template_preview' => $tt->getID()]);
      }
   }


   function getSpecificMassiveActions($checkitem = null) {

      $isadmin = static::canUpdate();
      $actions = parent::getSpecificMassiveActions($checkitem);

      if ($isadmin
          &&  $this->maybeRecursive()
          && (count($_SESSION['glpiactiveentities']) > 1)) {
         $actions[__CLASS__.MassiveAction::CLASS_ACTION_SEPARATOR.'merge'] = __('Merge and assign to current entity');
      }

      return $actions;
   }


   static function showMassiveActionsSubForm(MassiveAction $ma) {

      switch ($ma->getAction()) {
         case 'merge' :
            echo "&nbsp;".$_SESSION['glpiactive_entity_shortname'];
            echo "<br><br>".Html::submit(_x('button', 'Merge'), ['name' => 'massiveaction']);
            return true;
      }

      return parent::showMassiveActionsSubForm($ma);
   }


   static function processMassiveActionsForOneItemtype(MassiveAction $ma, CommonDBTM $item,
                                                       array $ids) {

      switch ($ma->getAction()) {
         case 'merge' :
            foreach ($ids as $key) {
               if ($item->can($key, UPDATE)) {
                  if ($item->getEntityID() == $_SESSION['glpiactive_entity']) {
                     if ($item->update(['id'           => $key,
                                             'is_recursive' => 1])) {
                        $ma->itemDone($item->getType(), $key, MassiveAction::ACTION_OK);
                     } else {
                        $ma->itemDone($item->getType(), $key, MassiveAction::ACTION_KO);
                        $ma->addMessage($item->getErrorMessage(ERROR_ON_ACTION));
                     }
                  } else {
                     $input2 = $item->fields;
                     // Change entity
                     $input2['entities_id']  = $_SESSION['glpiactive_entity'];
                     $input2['is_recursive'] = 1;
                     $input2 = Toolbox::addslashes_deep($input2);

                     if (!$item->import($input2)) {
                        $ma->itemDone($item->getType(), $key, MassiveAction::ACTION_KO);
                        $ma->addMessage($item->getErrorMessage(ERROR_ON_ACTION));
                     } else {
                        $ma->itemDone($item->getType(), $key, MassiveAction::ACTION_OK);
                     }
                  }

               } else {
                  $ma->itemDone($item->getType(), $key, MassiveAction::ACTION_NORIGHT);
                  $ma->addMessage($item->getErrorMessage(ERROR_RIGHT));
               }
            }
            return;
      }
      parent::processMassiveActionsForOneItemtype($ma, $item, $ids);
   }


   /**
    * Merge fields linked to template
    *
    * @since 0.90
    *
    * @param $target_id
    * @param  $source_id
   **/
   function mergeTemplateFields($target_id, $source_id) {
      global $DB;

      // Tables linked to ticket template
      $to_merge = ['predefinedfields', 'mandatoryfields', 'hiddenfields'];
      $itiltype = str_replace('Template', '', static::getType());

      // Source fields
      $source = [];
      foreach ($to_merge as $merge) {
         $source[$merge] = $this->formatFieldsToMerge(
            getAllDataFromTable(
               'glpi_'.$itiltype.'template'.$merge,
               [$itiltype.'templates_id' => $source_id]
            )
         );
      }

      // Target fields
      $target = [];
      foreach ($to_merge as $merge) {
         $target[$merge] = $this->formatFieldsToMerge(
            getAllDataFromTable(
               'glpi_'.$itiltype.'template'.$merge,
               [$itiltype.'templates_id' => $target_id]
            )
         );
      }

      // Merge
      foreach ($source as $merge => $data) {
         foreach ($data as $key => $val) {
            if (!array_key_exists($key, $target[$merge])) {
               $DB->update(
                  'glpi_'.$itiltype.'template'.$merge, [
                     $itiltype.'templates_id' => $target_id
                  ], [
                     'id' => $val['id']
                  ]
               );
            }
         }
      }
   }


   /**
    * Merge Itilcategories linked to template
    *
    * @since 0.90
    *
    * @param $target_id
    * @param $source_id
    */
   function mergeTemplateITILCategories($target_id, $source_id) {
      global $DB;

      $to_merge = [];
      switch (static::getType()) {
         case Ticket::getType():
            $to_merge = ['tickettemplates_id_incident', 'tickettemplates_id_demand'];
            break;
         default:
            $to_merge = [strtolower($this->getType() . 'templates_id')];
            break;
      }

      // Source categories
      $source = [];
      foreach ($to_merge as $merge) {
         $source[$merge] = getAllDataFromTable('glpi_itilcategories', [$merge => $source_id]);
      }

      // Target categories
      $target = [];
      foreach ($to_merge as $merge) {
         $target[$merge] = getAllDataFromTable('glpi_itilcategories', [$merge => $target_id]);
      }

      // Merge
      $template = new static();
      foreach ($source as $merge => $data) {
         foreach ($data as $key => $val) {
            $template->getFromDB($target_id);
            if (!array_key_exists($key, $target[$merge])
                && in_array($val['entities_id'], $_SESSION['glpiactiveentities'])) {
               $DB->update(
                  'glpi_itilcategories', [
                     $merge => $target_id
                  ], [
                     'id' => $val['id']
                  ]
               );
            }
         }
      }
   }


   /**
    * Format template fields to merge
    *
    * @since 0.90
    *
    * @param $data
   **/
   function formatFieldsToMerge($data) {

      $output = [];
      foreach ($data as $val) {
         $output[$val['num']] = $val;
      }

      return $output;
   }


   /**
    * Import a dropdown - check if already exists
    *
    * @since 0.90
    *
    * @param array $input  array of value to import (name, ...)
    *
    * @return integer|boolean true in case of success, -1 otherwise
   **/
   function import(array $input) {

      if (!isset($input['name'])) {
         return -1;
      }
      // Clean datas
      $input['name'] = trim($input['name']);

      if (empty($input['name'])) {
         return -1;
      }

      // Check twin
      $ID = $this->findID($input);
      if ($ID > 0) {
         // Merge data
         $this->mergeTemplateFields($ID, $input['id']);
         $this->mergeTemplateITILCategories($ID, $input['id']);

         // Delete source
         $this->delete($input, 1);

         // Update destination with source input
         $input['id'] = $ID;
      }

      $this->update($input);
      return true;

   }


   /**
    * Forbidden massive action
    *
    * @since 0.90
    *
    * @see CommonDBTM::getForbiddenStandardMassiveAction()
   **/
   function getForbiddenStandardMassiveAction() {

      $forbidden   = parent::getForbiddenStandardMassiveAction();
      $forbidden[] = 'merge';

      return $forbidden;
   }


   static function getIcon() {
      return "fas fa-layer-group";
   }
}