public static function merge($default_params, $input_params)
{
foreach ($default_params as $key => $value) {
if (empty($input_params[$key])) {
continue;
} else {
$value = $input_params[$key];
}
switch ($key) {
case "min_price":
if (Number::isNatural($value)) {
$default_params[$key] = $value;
}
break;
case "max_price":
if (Number::isNatural($value)) {
$default_params[$key] = $value;
}
break;
case "page":
if (Number::isNatural($value)) {
$default_params[$key] = $value;
}
break;
case "limit":
if (Number::isNatural($value) && $value < MAX_LIMIT) {
$default_params[$key] = $value;
}
break;
case "sort":
if ($value == "+price" || $value == "+id" || $value == "-price" || $value == "-id") {
$default_params[$key] = $value;
}
break;
case "category_id":
if (Number::isNatural($value)) {
$default_params[$key] = $value;
}
break;
case "id":
if (Number::isNatural($value)) {
$default_params[$key] = $value;
}
break;
case "keyword":
$default_params[$key] = $value;
break;
default:
// other params will be dropped..
break;
}
}
return $default_params;
}