<?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");
}


/**
 * ITILTemplatePredefinedField Class
 *
 * Predefined fields for ITIL template class
 *
 * @since 9.5.0
**/
abstract class ITILTemplatePredefinedField extends ITILTemplateField {

   static function getTypeName($nb = 0) {
      return _n('Predefined field', 'Predefined fields', $nb);
   }


   protected function computeFriendlyName() {

      $tt_class = static::$itemtype;
      $tt     = new $tt_class;
      $fields = $tt->getAllowedFieldsNames(true, true);

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


   function prepareInputForAdd($input) {
      // Use massiveaction system to manage add system.
      // Need to update data : value not set but
      if (!isset($input['value'])) {
         if (isset($input['field']) && isset($input[$input['field']])) {
            $input['value'] = $input[$input['field']];
            unset($input[$input['field']]);
            unset($input['field']);
         }
      }

      return parent::prepareInputForAdd($input);
   }


   function post_purgeItem() {
      global $DB;

      parent::post_purgeItem();

      $itil_class = static::$itiltype;
      $itil_object = new $itil_class;
      $itemtype_id = $itil_object->getSearchOptionIDByField('field', 'itemtype', $itil_object->getTable());
      $items_id_id = $itil_object->getSearchOptionIDByField('field', 'items_id', $itil_object->getTable());

      // Try to delete itemtype -> delete items_id
      if ($this->fields['num'] == $itemtype_id) {
         $iterator = $DB->request([
            'SELECT' => 'id',
            'FROM'   => $this->getTable(),
            'WHERE'  => [
               static::$items_id => $this->fields[static::$items_id],
               'num'             => $items_id_id
            ]
         ]);

         if (count($iterator)) {
            $result = $iterator->next();
            $a = new static();
            $a->delete(['id' => $result['id']]);
         }
      }
   }


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

      // can exists for template
      if ($item instanceof ITILTemplate
          && Session::haveRight("itiltemplate", READ)) {
         $nb = 0;
         if ($_SESSION['glpishow_count_on_tabs']) {
            $nb = countElementsInTable($this->getTable(),
                                       [static::$items_id => $item->getID()]);
         }
         return self::createTabEntry(self::getTypeName(Session::getPluralNumber()), $nb);
      }
      return '';
   }


   static function displayTabContentForItem(CommonGLPI $item, $tabnum = 1, $withtemplate = 0) {

      self::showForITILTemplate($item, $withtemplate);
      return true;
   }


   /**
    * Get predefined fields for a template
    *
    * @since 0.83
    *
    * @param integer $ID                   the template ID
    * @param boolean $withtypeandcategory  with type and category (false by default)
    *
    * @return array of predefined fields
   **/
   function getPredefinedFields($ID, $withtypeandcategory = false) {
      global $DB;

      $iterator = $DB->request([
         'FROM'   => $this->getTable(),
         'WHERE'  => [static::$items_id => $ID],
         'ORDER'  => 'id'
      ]);

      $tt_class       = static::$itemtype;
      $tt             = new $tt_class;
      $allowed_fields = $tt->getAllowedFields($withtypeandcategory, true);
      $fields         = [];
      $multiple       = self::getMultiplePredefinedValues();
      while ($rule = $iterator->next()) {
         if (isset($allowed_fields[$rule['num']])) {
            if (in_array($rule['num'], $multiple)) {
               if ($allowed_fields[$rule['num']] == 'items_id') {
                  $item_itemtype = explode("_", $rule['value']);
                  $fields[$allowed_fields[$rule['num']]][$item_itemtype[0]][$item_itemtype[1]] = $item_itemtype[1];
               } else {
                  $fields[$allowed_fields[$rule['num']]][] = $rule['value'];
               }
            } else {
               $fields[$allowed_fields[$rule['num']]] = $rule['value'];
            }
         }
      }
      return $fields;
   }


   /**
    * @since 0.85
   **/
   static function getMultiplePredefinedValues() {

      $itil_class = static::$itiltype;
      $itil_object = new $itil_class;

      $itemstable = null;
      switch ($itil_class) {
         case 'Change':
            $itemstable = 'glpi_changes_items';
            break;
         case 'Problem':
            $itemstable = 'glpi_items_problems';
            break;
         case 'Ticket':
            $itemstable = 'glpi_items_tickets';
            break;
         default:
            throw new \RuntimeException('Unknown ITIL type ' . $itil_class);
      }

      $fields = [
         $itil_object->getSearchOptionIDByField('field', 'name', 'glpi_documents'),
         $itil_object->getSearchOptionIDByField('field', 'items_id', $itemstable),
         $itil_object->getSearchOptionIDByField('field', 'name', 'glpi_tasktemplates')
      ];

      return $fields;
   }

   /**
    * 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)
    */
   static function getExcludedFields() {
      return [
         -2 => -2, // validation request
      ];
   }


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

      $ID = $tt->fields['id'];

      if (!$tt->getFromDB($ID) || !$tt->can($ID, READ)) {
         return false;
      }

      $canedit       = $tt->canEdit($ID);

      $fields        = $tt->getAllowedFieldsNames(true, true);
      $fields        = array_diff_key($fields, self::getExcludedFields());

      $itil_class    = static::$itiltype;
      $searchOption  = Search::getOptions($itil_class);
      $itil_object   = new $itil_class;
      $rand          = mt_rand();

      $iterator = $DB->request([
         'FROM'   => static::getTable(),
         'WHERE'  => [static::$items_id => $ID],
         'ORDER'  => 'id'
      ]);

      $display_options = [
         'relative_dates' => true,
         'comments'       => true,
         'html'           => true
      ];

      $predeffields = [];
      $used         = [];
      $numrows      = count($iterator);
      while ($data = $iterator->next()) {
         $predeffields[$data['id']] = $data;
         $used[$data['num']] = $data['num'];
      }

      if ($canedit) {
         echo "<div class='firstbloc'>";
         echo "<form name='changeproblem_form$rand' id='changeproblem_form$rand' method='post'
               action='".static::getFormURL()."'>";

         echo "<table class='tab_cadre_fixe'>";
         echo "<tr class='tab_bg_2'><th colspan='3'>".__('Add a predefined field')."</th></tr>";
         echo "<tr class='tab_bg_2'><td class='right top' width='30%'>";
         echo "<input type='hidden' name='".static::$items_id."' value='$ID'>";
         $display_fields[-1] = Dropdown::EMPTY_VALUE;
         $display_fields    += $fields;

         // Unset multiple items
         $multiple = self::getMultiplePredefinedValues();
         foreach ($multiple as $val) {
            if (isset($used[$val])) {
               unset($used[$val]);
            }
         }

         $rand_dp  = Dropdown::showFromArray('num', $display_fields, ['used' => $used,
                                                                           'toadd']);
         echo "</td><td class='top'>";
         $paramsmassaction = ['id_field'         => '__VALUE__',
                                    'itemtype'         => static::$itiltype,
                                    'inline'           => true,
                                    'submitname'       => _sx('button', 'Add'),
                                    'options'          => ['relative_dates'     => 1,
                                                               'with_time'          => 1,
                                                               'with_days'          => 0,
                                                               'with_specific_date' => 0,
                                                               'itemlink_as_string' => 1,
                                                               'entity'             => $tt->getEntityID()]];

         Ajax::updateItemOnSelectEvent("dropdown_num".$rand_dp, "show_massiveaction_field",
                                       $CFG_GLPI["root_doc"]."/ajax/dropdownMassiveActionField.php",
                                       $paramsmassaction);
         echo "</td><td>";
         echo "<span id='show_massiveaction_field'>&nbsp;</span>\n";
         echo "</td></tr>";
         echo "</table>";
         Html::closeForm();
         echo "</div>";
      }

      echo "<div class='spaced'>";
      if ($canedit && $numrows) {
         Html::openMassiveActionsForm('mass'.static::getType().$rand);
         $massiveactionparams = ['num_displayed' => min($_SESSION['glpilist_limit'], $numrows),
                                       'container'     => 'mass'.static::getType().$rand];
         Html::showMassiveActions($massiveactionparams);
      }
      echo "<table class='tab_cadre_fixehov'>";
      echo "<tr class='noHover'><th colspan='3'>";
      echo self::getTypeName($numrows);
      echo "</th></tr>";
      if ($numrows) {
         $header_begin  = "<tr>";
         $header_top    = '';
         $header_bottom = '';
         $header_end    = '';
         if ($canedit) {
            $header_top    .= "<th width='10'>";
            $header_top    .= Html::getCheckAllAsCheckbox('mass'.static::getType().$rand)."</th>";
            $header_bottom .= "<th width='10'>";
            $header_bottom .= Html::getCheckAllAsCheckbox('mass'.static::getType().$rand)."</th>";
         }
         $header_end .= "<th>".__('Name')."</th>";
         $header_end .= "<th>".__('Value')."</th>";
         $header_end .= "</tr>";
         echo $header_begin.$header_top.$header_end;

         foreach ($predeffields as $data) {
            if (!isset($fields[$data['num']])) {
               // could happen when itemtype removed and items_id present
               continue;
            }
            echo "<tr class='tab_bg_2'>";
            if ($canedit) {
               echo "<td>".Html::getMassiveActionCheckBox(static::getType(), $data["id"])."</td>";
            }
            echo "<td>".$fields[$data['num']]."</td>";

            echo "<td>";
            $display_datas[$searchOption[$data['num']]['field']] = $data['value'];
            echo $itil_object->getValueToDisplay($searchOption[$data['num']], $display_datas,
                                             $display_options);
            echo "</td>";
            echo "</tr>";
         }
         echo $header_begin.$header_bottom.$header_end;
      } else {
         echo "<tr><th colspan='3'>".__('No item found')."</th></tr>";
      }

      echo "</table>";
      if ($canedit && $numrows) {
         $massiveactionparams['ontop'] = false;
         Html::showMassiveActions($massiveactionparams);
         Html::closeForm();
      }
      echo "</div>";
   }

}