/**
  * init mapping form
  *
  * @param int $a_server_id
  * @return ilPropertyFormGUI $form
  *
  * @access protected
  */
 protected function initMappingsForm($a_server_id, $mapping_type)
 {
     include_once './Services/Form/classes/class.ilPropertyFormGUI.php';
     include_once './Services/WebServices/ECS/classes/class.ilECSDataMappingSettings.php';
     $mapping_settings = ilECSDataMappingSettings::getInstanceByServerId($a_server_id);
     $form = new ilPropertyFormGUI();
     if ($mapping_type == self::MAPPING_IMPORT) {
         $form->setTitle($this->lng->txt('ecs_mapping_tbl'));
         $form->addCommandButton('saveImportMappings', $this->lng->txt('save'));
         $form->addCommandButton('importMappings', $this->lng->txt('cancel'));
     } else {
         $form->setTitle($this->lng->txt('ecs_mapping_exp_tbl'));
         $form->addCommandButton('saveExportMappings', $this->lng->txt('save'));
         $form->addCommandButton('exportMappings', $this->lng->txt('cancel'));
     }
     $form->setFormAction($this->ctrl->getFormAction($this, 'saveMappings'));
     if ($mapping_type == self::MAPPING_IMPORT) {
         $assignments = new ilCustomInputGUI($this->lng->txt('ecs_mapping_crs'));
         $form->addItem($assignments);
     }
     include_once './Services/AdvancedMetaData/classes/class.ilAdvancedMDFieldDefinition.php';
     $fields = ilAdvancedMDFieldDefinition::_getActiveDefinitionsByObjType('crs');
     $options = $this->prepareFieldSelection($fields);
     // get all optional ecourse fields
     include_once './Services/WebServices/ECS/classes/class.ilECSUtils.php';
     $optional = ilECSUtils::_getOptionalECourseFields();
     foreach ($optional as $field_name) {
         if ($mapping_type == self::MAPPING_IMPORT) {
             $select = new ilSelectInputGUI($this->lng->txt('ecs_field_' . $field_name), 'mapping' . '[' . ilECSDataMappingSetting::MAPPING_IMPORT_CRS . '][' . $field_name . ']');
             $select->setValue($mapping_settings->getMappingByECSName(ilECSDataMappingSetting::MAPPING_IMPORT_CRS, $field_name));
             $select->setOptions($options);
             $assignments->addSubItem($select);
         } else {
             $select = new ilSelectInputGUI($this->lng->txt('ecs_field_' . $field_name), 'mapping' . '[' . ilECSDataMappingSetting::MAPPING_EXPORT . '][' . $field_name . ']');
             $select->setValue($mapping_settings->getMappingByECSName(ilECSDataMappingSetting::MAPPING_EXPORT, $field_name));
             $select->setOptions($options);
             $form->addItem($select);
         }
     }
     $server = new ilHiddenInputGUI('ecs_mapping_server');
     $server->setValue($a_server_id);
     $form->addItem($server);
     // Remote courses
     // no remote course settings for export
     if ($mapping_type == self::MAPPING_EXPORT) {
         return $form;
     }
     $rcrs = new ilCustomInputGUI($this->lng->txt('ecs_mapping_rcrs'));
     $form->addItem($rcrs);
     include_once './Services/AdvancedMetaData/classes/class.ilAdvancedMDFieldDefinition.php';
     $fields = ilAdvancedMDFieldDefinition::_getActiveDefinitionsByObjType('rcrs');
     $options = $this->prepareFieldSelection($fields);
     // get all optional econtent fields
     include_once './Services/WebServices/ECS/classes/class.ilECSUtils.php';
     $optional = ilECSUtils::_getOptionalEContentFields();
     foreach ($optional as $field_name) {
         $select = new ilSelectInputGUI($this->lng->txt('ecs_field_' . $field_name), 'mapping[' . ilECSDataMappingSetting::MAPPING_IMPORT_RCRS . '][' . $field_name . ']');
         $select->setValue($mapping_settings->getMappingByECSName(ilECSDataMappingSetting::MAPPING_IMPORT_RCRS, $field_name));
         $select->setOptions($options);
         $rcrs->addSubItem($select);
     }
     return $form;
 }
 /**
  * 
  *
  * @return
  * @static
  */
 public static function getPossibleFields()
 {
     global $lng;
     $options = array("community" => $lng->txt("ecs_field_community"), "part_id" => $lng->txt("ecs_field_part_id"), "type" => $lng->txt("type"));
     // will be handled by server soon?
     // only courses for now
     include_once './Services/WebServices/ECS/classes/class.ilECSUtils.php';
     $course_fields = ilECSUtils::_getOptionalECourseFields();
     foreach ($course_fields as $field) {
         $options[$field] = $lng->txt("obj_rcrs") . " - " . $lng->txt("ecs_field_" . $field);
     }
     return $options;
 }