|  1:  | <?php | 
|  2:  |  | 
|  3:  | declare(strict_types=1); | 
|  4:  |  | 
|  5:  | namespace PHPStan\BetterReflection\SourceLocator; | 
|  6:  |  | 
|  7:  | use PHPStan\BetterReflection\SourceLocator\Exception\InvalidFileLocation; | 
|  8:  |  | 
|  9:  | use function is_file; | 
| 10:  | use function is_readable; | 
| 11:  | use function sprintf; | 
| 12:  |  | 
| 13:  | class FileChecker | 
| 14:  | { | 
| 15:  |      | 
| 16:  |     public static function assertReadableFile(string $filename): void | 
| 17:  |     { | 
| 18:  |         if (empty($filename)) { | 
| 19:  |             throw new InvalidFileLocation('Filename was empty'); | 
| 20:  |         } | 
| 21:  |  | 
| 22:  |         if (! is_file($filename)) { | 
| 23:  |             throw new InvalidFileLocation(sprintf('"%s" is not a file', $filename)); | 
| 24:  |         } | 
| 25:  |  | 
| 26:  |         if (! is_readable($filename)) { | 
| 27:  |             throw new InvalidFileLocation(sprintf('File "%s" is not readable', $filename)); | 
| 28:  |         } | 
| 29:  |     } | 
| 30:  | } | 
| 31:  |  |