generate Unique Code

init.php

<?


AddEventHandler("iblock", "OnStartIBlockElementUpdate", "generateUniqueCode",10);
AddEventHandler("iblock", "OnStartIBlockElementAdd", "generateUniqueCode",10);
function generateUniqueCode(&$arFields){
    $IBLOCK_ID = $arFields['IBLOCK_ID'];

    if($IBLOCK_ID == 17){
        if(array_key_exists('CODE',$arFields)) {
            if(empty($arFields['CODE']) && !empty($arFields['NAME'])){
                $arParams = array("replace_space"=>"-","replace_other"=>"-");
                $arFields['CODE'] = Cutil::translit($arFields['NAME'],"ru",$arParams);
            }
        }
        if(!empty($arFields['CODE'])){
            $doublesFilter = array(
                "IBLOCK_ID"=>$IBLOCK_ID,
                "%CODE"=>$arFields['CODE'],
            );

            $EQUAL_EXIST = false;
            $arCount = array();

            $pattern = preg_quote($arFields['CODE'],"/").'(_([\d]+))*';
            $res_elem = CIBlockElement::GetList(
                array(),
                $doublesFilter,
                false,
                false,
                array("ID","IBLOCK_ID","CODE","NAME"));

            while ($arElem = $res_elem->Fetch()) {
                $matches = array();
                if($arElem['CODE'] == $arFields['CODE']){
                    $EQUAL_EXIST = $arElem['ID'];
                }
                preg_match('/'.$pattern.'/', $arElem['CODE'], $matches);
                if($matches[2]){
                    $arCount[] = $matches[2];
                }
            }

            if(count($arCount) == 0) {
                $arCount[] = 0;
            }

            if($EQUAL_EXIST){
                if(!empty($arFields['ID'])){ //update
                    if($arFields['ID'] != $EQUAL_EXIST){
                        $arFields['CODE'] .= "_".(max($arCount)+1);
                    }else{
                        //do nothing
                    }
                }else{ //add
                    $arFields['CODE'] .= "_".(max($arCount)+1);
                }
            }


        }
    }
    return true;
}