<?php
/**
 * ---------------------------------------------------------------------
 * GLPI - Gestionnaire Libre de Parc Informatique
 * Copyright (C) 2015-2017 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/>.
 * ---------------------------------------------------------------------
 */

/** @file
* @brief
*/

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

/// CommonDropdown class - generic dropdown
abstract class CommonDropdown extends CommonDBTM {


   // From CommonDBTM
   public $dohistory                   = true;

   // For delete operation (entity will overload this value)
   public $must_be_replace = false;

   //Menu & navigation
   public $first_level_menu  = "config";
   public $second_level_menu = "CommonDropdown";
   public $third_level_menu  = "";

   public $display_dropdowntitle  = true;

   //This dropdown can be translated
   public $can_be_translated = true;

   static $rightname = 'dropdown';


   /**
    * @since version 0.85
    *
    * @param $nb
   **/
   static function getTypeName($nb = 0) {
      return _n('Dropdown', 'Dropdowns', $nb);
   }


   /**
    * Is translation enabled for this itemtype
    *
    * @since version 0.85
    *
    * @return true if translation is available, false otherwise
   **/
   function maybeTranslated () {
      return $this->can_be_translated;
   }


   /**
    * @see CommonGLPI::getMenuShorcut()
    *
    * @since version 0.85
   **/
   static function getMenuShorcut() {
      return 'n';
   }


   /**
    *  @see CommonGLPI::getMenuContent()
    *
    *  @since version 0.85
   **/
   static function getMenuContent() {
      global $CFG_GLPI;

      $menu = [];
      if (get_called_class() == 'CommonDropdown') {
         $menu['title']             = static::getTypeName(Session::getPluralNumber());
         $menu['shortcut']          = 'n';
         $menu['page']              = '/front/dropdown.php';
         $menu['config']['default'] = '/front/dropdown.php';

         $dps = Dropdown::getStandardDropdownItemTypes();
         $menu['options'] = [];

         foreach ($dps as $tab) {
            foreach ($tab as $key => $val) {
               if ($tmp = getItemForItemtype($key)) {
                  $menu['options'][$key]['title']           = $val;
                  $menu['options'][$key]['page']            = $tmp->getSearchURL(false);
                  $menu['options'][$key]['links']['search'] = $tmp->getSearchURL(false);
                  if ($tmp->canCreate()) {
                     $menu['options'][$key]['links']['add'] = $tmp->getFormURL(false);
                  }
               }
            }
         }
         if (count($menu['options'])) {
            return $menu;
         }
      } else {
         return parent::getMenuContent();
      }
      return false;
   }


   /**
    * Return Additional Fields for this type
    *
    * @return array
   **/
   function getAdditionalFields() {
      global $DB;

      if ($DB->fieldExists($this->getTable(), 'product_number')) {
         return [['name' => 'product_number',
                            'type' => 'text',
                            'label' => __('Product Number')]];
      } else {
         return [];
      }
   }


   function defineTabs($options = []) {

      $ong = [];
      $this->addDefaultFormTab($ong);
      if ($this->dohistory) {
         $this->addStandardTab('Log', $ong, $options);
      }

      if (DropdownTranslation::canBeTranslated($this)) {
         $this->addStandardTab('DropdownTranslation', $ong, $options);
      }

      return $ong;
   }


   /**
    * Display title above search engine
    *
    * @return nothing (HTML display if needed)
   **/
   function title() {

      if ($this->display_dropdowntitle) {
         Dropdown::showItemTypeMenu(_n('Dropdown', 'Dropdowns', Session::getPluralNumber()),
                                    Dropdown::getStandardDropdownItemTypes(),
                                    $this->getSearchURL());
      }
   }


   function displayHeader() {

      if (empty($this->third_level_menu)) {
         $this->third_level_menu = $this->getType();
      }
      Html::header($this->getTypeName(Session::getPluralNumber()), '', $this->first_level_menu, $this->second_level_menu,
                   $this->third_level_menu);
   }


   /**
    * @since version 0.83.3
    *
    * @see CommonDBTM::prepareInputForAdd()
   **/
   function prepareInputForAdd($input) {
      global $DB;

      // if item based on location, create item in the same entity as location
      if (isset($input['locations_id'])) {
         foreach ($DB->request("SELECT `entities_id`
                                FROM `glpi_locations`
                                WHERE `id` = ".$input['locations_id']) as $data) {
            $input['entities_id'] = $data['entities_id'];
         }
      }

      if (isset($input['name'])) {
         // leading/ending space will break findID/import
         $input['name'] = trim($input['name']);
      }
      return $input;
   }


   /**
    * @since version 0.83.3
    *
    * @see CommonDBTM::prepareInputForUpdate()
   **/
   function prepareInputForUpdate($input) {
      return self::prepareInputForAdd($input);
   }


   function showForm($ID, $options = []) {
      global $CFG_GLPI;

      if (!$this->isNewID($ID)) {
         $this->check($ID, READ);
      } else {
         // Create item
         $this->check(-1, CREATE);
      }
      $this->showFormHeader($options);

      $fields = $this->getAdditionalFields();
      $nb     = count($fields);

      echo "<tr class='tab_bg_1'><td>".__('Name')."</td>";
      echo "<td>";
      if ($this instanceof CommonDevice) {
         // Awfull hack for CommonDevice where name is designation
         Html::autocompletionTextField($this, "designation");
      } else {
         Html::autocompletionTextField($this, "name");
      }
      echo "</td>";

      echo "<td rowspan='".($nb+1)."'>". __('Comments')."</td>";
      echo "<td rowspan='".($nb+1)."'>
            <textarea cols='45' rows='".($nb+2)."' name='comment' >".$this->fields["comment"];
      echo "</textarea></td></tr>\n";

      foreach ($fields as $field) {
         if (($field['name'] == 'entities_id')
             && ($ID == 0)
             && !$this->isNewID($ID)) {
            // No display for root entity
            echo "<tr class='tab_bg_1'><td colspan='2'>&nbsp;</td></tr>";
            break;
         }

         if (!isset($field['type'])) {
            $field['type'] = '';
         }

         if ($field['name'] == 'header') {
            echo "<tr class='tab_bg_1'><th colspan='2'>".$field['label']."</th></tr>";
            continue;
         }

         echo "<tr class='tab_bg_1'><td>".$field['label'];
         if (isset($field['comment']) && !empty($field['comment'])) {
            echo "&nbsp;";
            Html::showToolTip($field['comment']);
         }
         echo "</td><td>";

         switch ($field['type']) {
            case 'UserDropdown' :
               $param = ['name'   => $field['name'],
                              'value'  => $this->fields[$field['name']],
                              'right'  => 'interface',
                              'entity' => $this->fields["entities_id"]];
               if (isset($field['right'])) {
                  $params['right'] = $field['right'];
               }
               User::dropdown($param);

               break;

            case 'dropdownValue' :
               $params = ['value'  => $this->fields[$field['name']],
                               'name'   => $field['name'],
                               'entity' => $this->getEntityID()];
               if (isset($field['condition'])) {
                  $params['condition'] = $field['condition'];
               }
               Dropdown::show(getItemTypeForTable(getTableNameForForeignKeyField($field['name'])),
                              $params);
               break;

            case 'text' :
               Html::autocompletionTextField($this, $field['name']);
               break;

            case 'textarea' :
               $cols = 40;
               $rows = 3;

               if (isset($field['rows'])) {
                  $rows = $field['rows'];
               }
               if (isset($field['cols'])) {
                  $cols = $field['cols'];
               }
               echo "<textarea name='".$field['name']."' cols='$cols' rows='$rows'>".
                     $this->fields[$field['name']]."</textarea >";
               break;

            case 'integer' :
               Dropdown::showNumber($field['name'], ['value' => $this->fields[$field['name']]]);
               break;

            case 'timestamp' :
               $param = ['value' => $this->fields[$field['name']]];
               if (isset($field['min'])) {
                  $param['min'] = $field['min'];
               }
               if (isset($field['max'])) {
                  $param['max'] = $field['max'];
               }
               if (isset($field['step'])) {
                  $param['step'] = $field['step'];
               }
               Dropdown::showTimeStamp($field['name'], $param);
               break;

            case 'parent' :
               if ($field['name'] == 'entities_id') {
                  $restrict = -1;
               } else {
                  $restrict = $this->getEntityID();
               }
               Dropdown::show(getItemTypeForTable($this->getTable()),
                              ['value'  => $this->fields[$field['name']],
                                    'name'   => $field['name'],
                                    'entity' => $restrict,
                                    'used'   => ($ID>0 ? getSonsOf($this->getTable(), $ID)
                                                       : [])]);
               break;

            case 'icon' :
               Dropdown::dropdownIcons($field['name'], $this->fields[$field['name']],
                                       GLPI_ROOT."/pics/icones");
               if (!empty($this->fields[$field['name']])) {
                  echo "&nbsp;<img style='vertical-align:middle;' alt='' src='".
                       $CFG_GLPI["typedoc_icon_dir"]."/".$this->fields[$field['name']]."'>";
               }
               break;

            case 'bool' :
               Dropdown::showYesNo($field['name'], $this->fields[$field['name']]);
               break;

            case 'color' :
               Html::showColorField($field['name'], ['value' => $this->fields[$field['name']]]);
               break;

            case 'date' :
               Html::showDateField($field['name'], ['value' => $this->fields[$field['name']]]);
               break;

            case 'datetime' :
               Html::showDateTimeField($field['name'],
                                       ['value' => $this->fields[$field['name']]]);
               break;

            case 'password':
               echo "<input type='password' name='password' value='' size='20' autocomplete='off'>";
               break;

            default:
               $this->displaySpecificTypeField($ID, $field);
               break;
         }
         if (isset($field['unit'])) {
            echo "&nbsp;".$field['unit'];
         }

         echo "</td></tr>\n";
      }

      if (isset($this->fields['is_protected']) && $this->fields['is_protected']) {
         $options['candel'] = false;
      }

      if (isset($_REQUEST['_in_modal'])) {
         echo "<input type='hidden' name='_in_modal' value='1'>";
      }
      $this->showFormButtons($options);

      return true;
   }


   function displaySpecificTypeField($ID, $field = []) {
   }


   function pre_deleteItem() {

      if (isset($this->fields['is_protected']) && $this->fields['is_protected']) {
         return false;
      }
      return true;
   }


   function getSearchOptionsNew() {
      global $DB;
      $tab = [];

      $tab[] = [
         'id'   => 'common',
         'name' => __('Characteristics')
      ];

      $tab[] = [
         'id'                => '1',
         'table'             => $this->getTable(),
         'field'             => 'name',
         'name'              => __('Name'),
         'datatype'          => 'itemlink',
         'massiveaction'     => false
      ];

      $tab[] = [
         'id'                => '2',
         'table'             => $this->getTable(),
         'field'             => 'id',
         'name'              => __('ID'),
         'massiveaction'     => false,
         'datatype'          => 'number'
      ];

      if ($DB->fieldExists($this->getTable(), 'product_number')) {
         $tab[] = [
            'id'  => '3',
            'table'  => $this->getTable(),
            'field'  => 'product_number',
            'name'   => __('Product number')
         ];
      }

      $tab[] = [
         'id'                => '16',
         'table'             => $this->getTable(),
         'field'             => 'comment',
         'name'              => __('Comments'),
         'datatype'          => 'text'
      ];

      if ($this->isEntityAssign()) {
         $tab[] = [
            'id'             => '80',
            'table'          => 'glpi_entities',
            'field'          => 'completename',
            'name'           => __('Entity'),
            'massiveaction'  => false,
            'datatype'       => 'dropdown'
         ];
      }

      if ($this->maybeRecursive()) {
         $tab[] = [
            'id'             => '86',
            'table'          => $this->getTable(),
            'field'          => 'is_recursive',
            'name'           => __('Child entities'),
            'datatype'       => 'bool'
         ];
      }

      if ($this->isField('date_mod')) {
         $tab[] = [
            'id'             => '19',
            'table'          => $this->getTable(),
            'field'          => 'date_mod',
            'name'           => __('Last update'),
            'datatype'       => 'datetime',
            'massiveaction'  => false
         ];
      }

      if ($this->isField('date_creation')) {
         $tab[] = [
            'id'             => '121',
            'table'          => $this->getTable(),
            'field'          => 'date_creation',
            'name'           => __('Creation date'),
            'datatype'       => 'datetime',
            'massiveaction'  => false
         ];
      }

      // add objectlock search options
      $tab = array_merge($tab, ObjectLock::getSearchOptionsToAddNew(get_class($this)));

      return $tab;
   }


   /** Check if the dropdown $ID is used into item tables
    *
    * @return boolean : is the value used ?
   **/
   function isUsed() {
      global $DB;

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

      $RELATION = getDbRelations();
      if (isset($RELATION[$this->getTable()])) {
         foreach ($RELATION[$this->getTable()] as $tablename => $field) {
            if ($tablename[0] != '_') {
               if (!is_array($field)) {
                  $query = "SELECT COUNT(*) AS cpt
                            FROM `$tablename`
                            WHERE `$field` = '$ID'";
                  $result = $DB->query($query);
                  if ($DB->result($result, 0, "cpt") > 0) {
                     return true;
                  }

               } else {
                  foreach ($field as $f) {
                     $query = "SELECT COUNT(*) AS cpt
                               FROM `$tablename`
                               WHERE `$f` = '$ID'";
                     $result = $DB->query($query);
                     if ($DB->result($result, 0, "cpt") > 0) {
                        return true;
                     }
                  }
               }
            }
         }
      }
      return false;
   }


   /**
    * Report if a dropdown have Child
    * Used to (dis)allow delete action
   **/
   function haveChildren() {
      return false;
   }


   /**
    * Show a dialog to Confirm delete action
    * And propose a value to replace
    *
    * @param $target string URL
   **/
   function showDeleteConfirmForm($target) {

      if ($this->haveChildren()) {
         echo "<div class='center'><p class='red'>" .
               __("You can't delete that item, because it has sub-items") . "</p></div>";
         return false;
      }

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

      echo "<div class='center'><p class='red'>";
      echo __("Caution: you're about to remove a heading used for one or more items.");
      echo "</p>";

      if (!$this->must_be_replace) {
         // Delete form (set to 0)
         echo "<p>".__('If you confirm the deletion, all uses of this dropdown will be blanked.') .
              "</p>";
         echo "<form action='$target' method='post'>";
         echo "<table class='tab_cadre'><tr>";
         echo "<td><input type='hidden' name='id' value='$ID'>";
         echo "<input type='hidden' name='forcepurge' value='1'>";
         echo "<input class='submit' type='submit' name='purge'
                value=\""._sx('button', 'Confirm')."\">";
         echo "</td>";
         echo "<td><input class='submit' type='submit' name='annuler'
                    value=\""._sx('button', 'Cancel')."\">";
         echo "</td></tr></table>\n";
         Html::closeForm();
      }

      // Replace form (set to new value)
      echo "<p>". __('You can also replace all uses of this dropdown by another.') ."</p>";
      echo "<form action='$target' method='post'>";
      echo "<table class='tab_cadre'><tr><td>";

      if ($this instanceof CommonTreeDropdown) {
         // TreeDropdown => default replacement is parent
         $fk = $this->getForeignKeyField();
         Dropdown::show(getItemTypeForTable($this->getTable()),
                        ['name'   => '_replace_by',
                              'value'  => $this->fields[$fk],
                              'entity' => $this->getEntityID(),
                              'used'   => getSonsOf($this->getTable(), $ID),
                              'width'   => '100%']);

      } else {
         Dropdown::show(getItemTypeForTable($this->getTable()),
                        ['name'   => '_replace_by',
                              'entity' => $this->getEntityID(),
                              'used'   => [$ID]]);
      }
      echo "<input type='hidden' name='id' value='$ID' />";
      echo "</td><td>";
      echo "<input class='submit' type='submit' name='replace' value=\""._sx('button', 'Replace')."\">";
      echo "</td><td>";
      echo "<input class='submit' type='submit' name='annuler' value=\""._sx('button', 'Cancel')."\">";
      echo "</td></tr></table>\n";
      Html::closeForm();
      echo "</div>";
   }


   /**
    * check if a dropdown already exists (before import)
    *
    * @param &$input  array of value to import (name)
    *
    * @return the ID of the new (or -1 if not found)
   **/
   function findID(array &$input) {
      global $DB;

      if (!empty($input["name"])) {
         $query = "SELECT `id`
                   FROM `".$this->getTable()."`
                   WHERE `name` = '".$input["name"]."'";

         if ($this->isEntityAssign()) {
            $query .= getEntitiesRestrictRequest(' AND ', $this->getTable(), '',
                                                 $input['entities_id'], $this->maybeRecursive());
         }
         $query .= " LIMIT 1";

         // Check twin :
         if ($result_twin = $DB->query($query)) {
            if ($DB->numrows($result_twin) > 0) {
               return $DB->result($result_twin, 0, "id");
            }
         }
      }
      return -1;
   }


   /**
    * Import a dropdown - check if already exists
    *
    * @param $input  array of value to import (name, ...)
    *
    * @return the ID of the new or existing dropdown (-1 on failure)
   **/
   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 :
      if ($ID = $this->findID($input)) {
         if ($ID > 0) {
            return $ID;
         }
      }

      return $this->add($input);
   }


   /**
    * Import a value in a dropdown table.
    *
    * This import a new dropdown if it doesn't exist - Play dictionnary if needed
    *
    * @param $value           string   Value of the new dropdown (need to be addslashes)
    * @param $entities_id     int      entity in case of specific dropdown (default -1)
    * @param $external_params array    (manufacturer) (need to be addslashes)
    * @param $comment                  (default '') (need to be addslashes)
    * @param $add                      if true, add it if not found. if false,
    *                                  just check if exists (true by default)
    *
    * @return integer : dropdown id.
   **/
   function importExternal($value, $entities_id = -1, $external_params = [], $comment = "",
                           $add = true) {

      $value = trim($value);
      if (strlen($value) == 0) {
         return 0;
      }

      $ruleinput      = ["name" => stripslashes($value)];
      $rulecollection = RuleCollection::getClassByType($this->getType(), true);

      foreach ($this->additional_fields_for_dictionnary as $field) {
         if (isset($external_params[$field])) {
            $ruleinput[$field] = $external_params[$field];
         } else {
            $ruleinput[$field] = '';
         }
      }
      /*
      switch ($this->getTable()) {
         case "glpi_computermodels" :
         case "glpi_monitormodels" :
         case "glpi_printermodels" :
         case "glpi_peripheralmodels" :
         case "glpi_phonemodels" :
         case "glpi_networkequipmentmodels" :
            $ruleinput["manufacturer"] = $external_params["manufacturer"];
            break;
      }*/

      $input["name"]        = $value;
      $input["comment"]     = $comment;
      $input["entities_id"] = $entities_id;

      if ($rulecollection) {
         $res_rule = $rulecollection->processAllRules(Toolbox::stripslashes_deep($ruleinput), [], []);
         if (isset($res_rule["name"])) {
            $input["name"] = $res_rule["name"];
         }
      }
      return ($add ? $this->import($input) : $this->findID($input));
   }


   /**
    * @see CommonDBTM::getSpecificMassiveActions()
    **/
   function getSpecificMassiveActions($checkitem = null) {

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

      // Manage forbidden actions
      $forbidden_actions = $this->getForbiddenStandardMassiveAction();

      if ($isadmin
          &&  $this->maybeRecursive()
          && (count($_SESSION['glpiactiveentities']) > 1)
          && !in_array('merge', $forbidden_actions)) {
         $actions[__CLASS__.MassiveAction::CLASS_ACTION_SEPARATOR.'merge'] = __('Transfer and merge');
      }

      return $actions;
   }


   /**
    * @since version 0.85
    *
    * @see CommonDBTM::showMassiveActionsSubForm()
   **/
   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);
   }


   /**
    * @since version 0.85
    *
    * @see CommonDBTM::processMassiveActionsForOneItemtype()
   **/
   static function processMassiveActionsForOneItemtype(MassiveAction $ma, CommonDBTM $item,
                                                       array $ids) {

      switch ($ma->getAction()) {
         case 'merge' :
            $fk = $item->getForeignKeyField();
            foreach ($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 = $item->fields;
                     // Remove keys (and name, tree dropdown will use completename)
                     if ($item instanceof CommonTreeDropdown) {
                        unset($input2['id'], $input2['name'], $input2[$fk]);
                     } else {
                        unset($input2['id']);
                     }
                     // Change entity
                     $input2['entities_id']  = $_SESSION['glpiactive_entity'];
                     $input2['is_recursive'] = 1;
                     $input2 = Toolbox::addslashes_deep($input2);
                     // Import new
                     if ($newid = $item->import($input2)) {
                        // Delete old
                        if ($newid > 0) {
                           // delete with purge for dropdown with dustbin (Budget)
                           $item->delete(['id'          => $key,
                                               '_replace_by' => $newid], 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 {
                  $ma->itemDone($item->getType(), $key, MassiveAction::ACTION_NORIGHT);
                  $ma->addMessage($item->getErrorMessage(ERROR_RIGHT));
               }
            }
            return;
      }
      parent::processMassiveActionsForOneItemtype($ma, $item, $ids);
   }

   /**
    * Get links to Faq
    *
    * @param $withname  boolean  also display name ? (false by default)
   **/
   function getLinks($withname = false) {
      global $CFG_GLPI;

      $ret = '';

      if ($withname) {
         $ret .= $this->fields["name"];
         $ret .= "&nbsp;&nbsp;";
      }

      if ($this->isField('knowbaseitemcategories_id')
          && $this->fields['knowbaseitemcategories_id']) {
         $title = __s('FAQ');

         if (Session::getCurrentInterface() == 'central') {
            $title = __s('Knowledge base');
         }

         $rand = mt_rand();
         $kbitem = new KnowbaseItem;
         $found_kbitem = $kbitem->find("`knowbaseitemcategories_id` = ".
                                       $this->fields['knowbaseitemcategories_id']);

         $kbitem->getFromDB(reset($found_kbitem)['id']);
         if (count($found_kbitem)) {
            $ret.= "<div class='faqadd_block'>";
            $ret.= "<label for='display_faq_chkbox$rand'>";
            $ret.= "<img src='".$CFG_GLPI["root_doc"]."/pics/faqadd.png' class='middle pointer'
                      alt=\"$title\" title=\"$title\">";
            $ret.= "</label>";
            $ret.= "<input type='checkbox'  class='display_faq_chkbox' id='display_faq_chkbox$rand'>";
            $ret.= "<div class='faqadd_entries'>";
            if (count($found_kbitem) == 1) {
               $ret.= "<div class='faqadd_block_content' id='faqadd_block_content$rand'>";
               $ret.= $kbitem->showFull(['display' => false]);
               $ret.= "</div>"; // .faqadd_block_content
            } else {
               $ret.= Html::scriptBlock("
                  var getKnowbaseItemAnswer$rand = function() {
                     var knowbaseitems_id = $('#dropdown_knowbaseitems_id$rand').val();
                     $('#faqadd_block_content$rand').load(
                        '".$CFG_GLPI['root_doc']."/ajax/getKnowbaseItemAnswer.php',
                        {
                           'knowbaseitems_id': knowbaseitems_id
                        }
                     );
                  };
               ");
               $ret.= "<label for='dropdown_knowbaseitems_id$rand'>".
                      KnowbaseItem::getTypeName()."</label>&nbsp;";
               $ret.= KnowbaseItem::dropdown(['value'     => reset($found_kbitem)['id'],
                                              'display'   => false,
                                              'rand'      => $rand,
                                              'condition' => "`knowbaseitemcategories_id` = ".
                                                             $this->fields['knowbaseitemcategories_id'],
                                              'on_change' => "getKnowbaseItemAnswer$rand()"]);
               $ret.= "<div class='faqadd_block_content' id='faqadd_block_content$rand'>";
               $ret.= $kbitem->showFull(['display' => false]);
               $ret.= "</div>"; // .faqadd_block_content
            }
            $ret.= "</div>"; // .faqadd_entries
            $ret.= "</div>"; // .faqadd_block
         }
      }
      return $ret;
   }
}
