CCrmInvoiceRestService::filterFields

static function filterFields($fields, $method, $keepUserFields = true)
{
	$result = array();

	if (!is_array($fields) || count($fields) === 0)
		return $result;

	if (!in_array($method, array('get', 'add', 'update', 'list'), true))
		return $result;

	$bTaxMode = CCrmTax::isTaxMode();

	$fieldsInfo = self::getFieldsInfo();
	$allowedFields = array();
	foreach ($fieldsInfo as $fName => $fInfo)
	{
		if ($fInfo[$method] === true)
		{
			if ($fName !== 'PR_LOCATION')
			{
				$allowedFields[] = $fName;
			}
			else
			{
				if ($bTaxMode)
					$allowedFields[] = $fName;
			}
		}
	}
	unset($fName, $fInfo);

	// user fields
	if ($keepUserFields)
	{
		$userFields = CCrmInvoice::GetUserFields();
		foreach(array_keys($userFields) as $fieldName)
			$allowedFields[] = $fieldName;
		unset($userFields);
	}

	foreach ($fields as $fName => $fValue)
	{
		if ($fName !== 'INVOICE_PROPERTIES' && $fName !== 'PRODUCT_ROWS' && in_array($fName, $allowedFields))
			$result[$fName] = CCrmInvoiceRestUtil::convertValue($method, $fieldsInfo[$fName]['type'], $fValue);
	}

	if (isset($fields['INVOICE_PROPERTIES']) && is_array($fields['INVOICE_PROPERTIES'])
		&& in_array('INVOICE_PROPERTIES', $allowedFields, true))
	{
		$props = array();
		foreach ($fields['INVOICE_PROPERTIES'] as $k => $v)
		{
			if (!is_array($v) /*&& preg_match('/^[A-Za-z0-9_\-]+$/',strval($k))*/)
			{
				$props[$k] = $v;
			}
		}
		if (count($props) > 0)
			$result['INVOICE_PROPERTIES'] = $props;
		unset($props, $k, $v);
	}

	if (isset($fields['PRODUCT_ROWS']) && is_array($fields['PRODUCT_ROWS'])
		&& in_array('PRODUCT_ROWS', $allowedFields))
	{
		$products = array();
		foreach ($fields['PRODUCT_ROWS'] as $productRow)
		{
			$row = array();
			foreach ($productRow as $k => $v)
			{
				if (in_array('PRODUCT_ROWS.[].'.$k, $allowedFields, true))
					$row[$k] = CCrmInvoiceRestUtil::convertValue($method, $fieldsInfo['PRODUCT_ROWS.[].'.$k]['type'], $v);
			}
			if (count($row) > 0)
			{
				$row['CUSTOMIZED'] = 'Y';    // don't update price from catalog
				$products[] = $row;
			}
		}
		if (count($products) > 0)
			$result['PRODUCT_ROWS'] = $products;
		unset($products, $productRow, $k, $v, $row);
	}
	unset($fieldsInfo);

	return $result;
}