ExternalTable::updateMultipleForOwner

static function updateMultipleForOwner($primaryOwner, $external)
{
	$primaryOwner = Assert::expectIntegerPositive($primaryOwner, '$primaryOwner');

	$res = self::getList(array(
		'filter' => array('LOCATION_ID' => $primaryOwner)
	));

	$existed = array();
	while($item = $res->fetch())
		$existed[$item['ID']][$item['SERVICE_ID']] = $item['XML_ID'];

	foreach($external as $id => $data)
	{
		$data['REMOVE'] ??= false;
		$data['SERVICE_ID'] ??= 0;
		$data['XML_ID'] = (string)($data['XML_ID'] ?? '');

		$serivceId = (int)$data['SERVICE_ID'];
		$id = (int)$id;

		if (isset($existed[$id]))
		{
			if ($data['XML_ID'] === '' || !$serivceId || $data['REMOVE'])
			{
				// field either empty or prepared to remove
				self::delete($id);
			}
			else
			{
				$res = self::update(
					$id,
					[
						'SERVICE_ID' => $serivceId,
						'XML_ID' => $data['XML_ID'],
					]
				);
				if (!$res->isSuccess())
				{
					throw new MainSystemException(Loc::getMessage('SALE_LOCATION_EXTERNAL_ENTITY_CANNOT_UPDATE_DATA_EXCEPTION'));
				}
			}
		}
		else
		{
			if ($serivceId && $data['XML_ID'] !== '')
			{
				$res = self::add([
					'SERVICE_ID' => $serivceId,
					'XML_ID' => $data['XML_ID'],
					'LOCATION_ID' => $primaryOwner,
				]);
				if (!$res->isSuccess())
				{
					throw new MainSystemException(Loc::getMessage('SALE_LOCATION_EXTERNAL_ENTITY_CANNOT_ADD_DATA_EXCEPTION'));
				}
			}
		}
	}
}