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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | namespace Celema\Boiler; |
| 6 | |
| 7 | use Celema\Boiler\Exception\LookupException; |
| 8 | use Celema\Boiler\Exception\UnexpectedValueException; |
| 9 | use Override; |
| 10 | |
| 11 | /** |
| 12 | * @psalm-type DirsInput = non-empty-string|array<array-key, non-empty-string> |
| 13 | * @psalm-type Dirs = non-empty-array<array-key, non-empty-string> |
| 14 | */ |
| 15 | final class Resolver implements Contract\Resolver |
| 16 | { |
| 17 | /** @psalm-var Dirs */ |
| 18 | private readonly array $dirs; |
| 19 | /** @var array<string, non-empty-string> */ |
| 20 | private array $pathCache = []; |
| 21 | |
| 22 | /** @psalm-param DirsInput $dirs */ |
| 23 | public function __construct( |
| 24 | array|string $dirs, |
| 25 | ) { |
| 26 | $this->dirs = $this->prepareDirs($dirs); |
| 27 | } |
| 28 | |
| 29 | /** @return non-empty-string */ |
| 30 | #[Override] |
| 31 | public function resolve(string $path): string |
| 32 | { |
| 33 | if (isset($this->pathCache[$path])) { |
| 34 | return $this->pathCache[$path]; |
| 35 | } |
| 36 | |
| 37 | if (!preg_match('/^[\w\.\/:_-]+$/u', $path)) { |
| 38 | throw new UnexpectedValueException('The template path is invalid or empty'); |
| 39 | } |
| 40 | |
| 41 | [$namespace, $file] = $this->segments($path); |
| 42 | |
| 43 | return $this->pathCache[$path] = $this->path($namespace, $file); |
| 44 | } |
| 45 | |
| 46 | /** @return list{null|non-empty-string, non-empty-string} */ |
| 47 | private function segments(string $path): array |
| 48 | { |
| 49 | if (!str_contains($path, ':')) { |
| 50 | $path = trim($path); |
| 51 | assert($path !== '', 'Template path must not be empty after trimming'); |
| 52 | |
| 53 | return [null, $path]; |
| 54 | } |
| 55 | |
| 56 | $segments = array_map(trim(...), explode(':', $path)); |
| 57 | |
| 58 | if (count($segments) === 2) { |
| 59 | [$namespace, $file] = $segments; |
| 60 | |
| 61 | if ($namespace !== '' && $file !== '') { |
| 62 | return [$namespace, $file]; |
| 63 | } |
| 64 | } |
| 65 | |
| 66 | throw new LookupException( |
| 67 | "Invalid template format: '{$path}'. " . "Use 'namespace:template/path or template/path'.", |
| 68 | ); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * @param non-empty-string $file |
| 73 | * |
| 74 | * @return non-empty-string |
| 75 | */ |
| 76 | private function path(?string $namespace, string $file): string |
| 77 | { |
| 78 | if ($namespace === null) { |
| 79 | $dirs = $this->dirs; |
| 80 | } elseif (array_key_exists($namespace, $this->dirs)) { |
| 81 | $dirs = [$this->dirs[$namespace]]; |
| 82 | } else { |
| 83 | throw new LookupException("Template namespace `{$namespace}` does not exist"); |
| 84 | } |
| 85 | |
| 86 | $errors = []; |
| 87 | |
| 88 | foreach ($dirs as $dir) { |
| 89 | $candidate = new Path($dir, $file); |
| 90 | |
| 91 | if ($candidate->isValid()) { |
| 92 | return $candidate->path(); |
| 93 | } |
| 94 | |
| 95 | $errors[] = $candidate->error(); |
| 96 | } |
| 97 | |
| 98 | // Name every directory searched, not just the last, as each can fail |
| 99 | // for its own reason, such as a path that leads outside its root. |
| 100 | throw new LookupException(implode('; ', $errors)); |
| 101 | } |
| 102 | |
| 103 | /** |
| 104 | * @psalm-param DirsInput $dirs |
| 105 | * |
| 106 | * @psalm-return Dirs |
| 107 | */ |
| 108 | private function prepareDirs(array|string $dirs): array |
| 109 | { |
| 110 | $preparePath = static function (string $dir): string { |
| 111 | $realpath = realpath($dir); |
| 112 | |
| 113 | if ($realpath === false) { |
| 114 | throw new LookupException( |
| 115 | 'Template directory does not exist ' . $dir, |
| 116 | ); |
| 117 | } |
| 118 | |
| 119 | assert($realpath !== '', 'Resolved template directory path must not be empty'); |
| 120 | |
| 121 | return $realpath; |
| 122 | }; |
| 123 | |
| 124 | if (is_string($dirs)) { |
| 125 | return [$preparePath($dirs)]; |
| 126 | } |
| 127 | |
| 128 | if ($dirs === []) { |
| 129 | throw new LookupException('At least one template directory must be configured'); |
| 130 | } |
| 131 | |
| 132 | return array_map($preparePath, $dirs); |
| 133 | } |
| 134 | } |