/**
* 通过参数查找Package
* @param $arg mixed 查询参数,可为文件md5或者package id
*/
public static function findOrFailFromArg($arg, $user_id)
{
if (is_numeric($arg)) {
$package = Package::whereUserId($user_id)->findOrFail($arg);
} else {
if (is_string($arg)) {
$package = Package::whereMd5($arg)->orderBy('created_at', 'desc')->firstOrFail();
} else {
App::abort(404);
}
}
return $package;
}