AddEventHandler(
    "iblock","OnAfterIBlockElementAdd",array("CB","OnBeforeIBlockElementAdd")
);
AddEventHandler("iblock", "OnBeforeIBlockElementUpdate",array("CB","OnBeforeIBlockElementAdd"));
class CB
{
    public function OnBeforeIBlockElementAdd ( &$arFields )
    {

        file_put_contents ( __DIR__  . 'log.log', print_r(  $arFields, 1 ) );

        //$arFields['RESULT_MESSAGE'] = 'Ошибка! Такой код контрагента уже используется!';

        // надо написать проверку на уникальность для UI_IBLOCK_DEPARTMENTS

        if ( $arFields[ 'IBLOCK_ID' ] == UI_IBLOCK_DEPARTMENTS ) :

            // пока пусто

        endif;




        // управление списками передачи документов

        if ( $arFields[ 'IBLOCK_ID' ] == IU_IBLOCK_DOC_TRANSFER ) :

            // 435 ORGANIZATSIYA  // 481 ORGANIZATSIYA_POLUCHATEL_

            $userID = $arFields[ 'PROPERTY_VALUES' ][ 441 ][ 'n0' ][ 'VALUE' ];
            //$organisation =
            $departmentsId = $arFields[ 'PROPERTY_VALUES' ][ 442 ][ 'n0' ][ 'VALUE' ];

            if ( !$departmentsId ) {
             //   $arFields[ 'PROPERTY_VALUES' ][ 442 ][ 'n0' ][ 'VALUE' ] = Developer::GetUserHeadQuarterId( $userID );

                //$arFields['IBLOCK_ID']

                CIBlockElement::SetPropertyValuesEx(
                    $arFields['IBLOCK_ID'],
                    IU_IBLOCK_DOC_TRANSFER,
                    array('OTDEL' => [Developer::GetUserHeadQuarterId( $userID )]),
                    array('NewElement')
                );

                file_put_contents( $_SERVER[ 'DOCUMENT_ROOT' ] . '/log2.log', print_r( $arFields, 1 ) );


                CIBlockElement::UpdateSearch( $arFields['IBLOCK_ID'],true );

            }


            // PROPERTY_527 (dev) PROPERTY_523 (main)
            //$arFields['PROPERTY_VALUES']['n0']['VALUE']

            //

        endif;

        //return true; //$arFields;
    }
}