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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Cosray\Util; |
| 6 | |
| 7 | use Cosray\Exception\RuntimeException; |
| 8 | |
| 9 | class Path |
| 10 | { |
| 11 | public static function inside(string $parent, string $child, bool $checkIsFile = false): string |
| 12 | { |
| 13 | $parent = realpath($parent); |
| 14 | |
| 15 | if (!$parent) { |
| 16 | throw new RuntimeException('Parent directory does not exist.'); |
| 17 | } |
| 18 | |
| 19 | $prefix = rtrim($parent, '\\/') . DIRECTORY_SEPARATOR; |
| 20 | $path = realpath($prefix . ltrim($child, '\\/')); |
| 21 | |
| 22 | if (!$path || !str_starts_with($path, $prefix)) { |
| 23 | throw new RuntimeException( |
| 24 | 'File or directory does not exist or is not in the expected location.', |
| 25 | ); |
| 26 | } |
| 27 | |
| 28 | if ($checkIsFile && !is_file($path)) { |
| 29 | throw new RuntimeException('Path is not a file: ' . $path); |
| 30 | } |
| 31 | |
| 32 | return $path; |
| 33 | } |
| 34 | |
| 35 | /** |
| 36 | * Resolves a directory configured below `$parent`. Unlike `inside()`, the |
| 37 | * directory may resolve elsewhere through a symlink, such as uploads shared |
| 38 | * between deployed releases; only `..` segments in `$child` are refused. |
| 39 | */ |
| 40 | public static function below(string $parent, string $child): string |
| 41 | { |
| 42 | if (in_array('..', explode('/', str_replace('\\', '/', $child)), true)) { |
| 43 | throw new RuntimeException('Path leaves its parent directory: ' . $child); |
| 44 | } |
| 45 | |
| 46 | $dir = rtrim($parent, '\\/') . DIRECTORY_SEPARATOR . ltrim($child, '\\/'); |
| 47 | $path = realpath($dir); |
| 48 | |
| 49 | if ($path === false || !is_dir($path)) { |
| 50 | throw new RuntimeException('Directory does not exist: ' . $dir); |
| 51 | } |
| 52 | |
| 53 | return $path; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Creates the directory and its parents unless it exists. Concurrent |
| 58 | * requests may create it at the same time; only a directory that still |
| 59 | * does not exist afterwards is an error. |
| 60 | */ |
| 61 | public static function ensureDirectory(string $dir, int $mode = 0o755): void |
| 62 | { |
| 63 | if (is_dir($dir)) { |
| 64 | return; |
| 65 | } |
| 66 | |
| 67 | // mkdir() warns when another request created the directory first, |
| 68 | // and the request's error handler would turn that into an exception. |
| 69 | set_error_handler(static fn(): bool => true); |
| 70 | |
| 71 | try { |
| 72 | $created = mkdir($dir, $mode, recursive: true); |
| 73 | } finally { |
| 74 | restore_error_handler(); |
| 75 | } |
| 76 | |
| 77 | if (!$created && !is_dir($dir)) { |
| 78 | throw new RuntimeException('Could not create directory: ' . $dir); |
| 79 | } |
| 80 | } |
| 81 | } |