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| 1 | <?php |
| 2 | declare(strict_types=1); |
| 3 | /** |
| 4 | * Pop PHP Framework (https://www.popphp.org/) |
| 5 | * |
| 6 | * @link https://github.com/popphp/popphp-framework |
| 7 | * @author Nick Sagona, III <nick@popphp.org> |
| 8 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 9 | * @license https://www.popphp.org/license New BSD License |
| 10 | */ |
| 11 | |
| 12 | /** |
| 13 | * @namespace |
| 14 | */ |
| 15 | namespace Pop\View\Template\Stream; |
| 16 | |
| 17 | /** |
| 18 | * View stream template compiled-cache class |
| 19 | * |
| 20 | * @category Pop |
| 21 | * @package Pop\View |
| 22 | * @author Nick Sagona, III <nick@popphp.org> |
| 23 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 24 | * @license https://www.popphp.org/license New BSD License |
| 25 | * @version 5.0.0 |
| 26 | */ |
| 27 | class Cache |
| 28 | { |
| 29 | |
| 30 | /** |
| 31 | * Cache directory |
| 32 | * @var string |
| 33 | */ |
| 34 | protected string $dir; |
| 35 | |
| 36 | /** |
| 37 | * Constructor |
| 38 | * |
| 39 | * @param string $dir |
| 40 | */ |
| 41 | public function __construct(string $dir) |
| 42 | { |
| 43 | $this->dir = rtrim($dir, '/\\'); |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * Get the cache directory |
| 48 | * |
| 49 | * @return string |
| 50 | */ |
| 51 | public function getDir(): string |
| 52 | { |
| 53 | return $this->dir; |
| 54 | } |
| 55 | |
| 56 | /** |
| 57 | * Derive a stable cache key from resolved template content |
| 58 | * |
| 59 | * @param string $resolvedTemplate |
| 60 | * @return string |
| 61 | */ |
| 62 | public static function key(string $resolvedTemplate): string |
| 63 | { |
| 64 | return hash('sha256', $resolvedTemplate); |
| 65 | } |
| 66 | |
| 67 | /** |
| 68 | * Get the absolute path to the cache file for a given key |
| 69 | * |
| 70 | * @param string $key |
| 71 | * @return string |
| 72 | */ |
| 73 | public function path(string $key): string |
| 74 | { |
| 75 | return $this->dir . DIRECTORY_SEPARATOR . $key . '.php'; |
| 76 | } |
| 77 | |
| 78 | /** |
| 79 | * Get cached compiled source for a key, or null on miss/stale |
| 80 | * |
| 81 | * @param string $key |
| 82 | * @param int $newestSourceMtime |
| 83 | * @return ?string |
| 84 | */ |
| 85 | public function get(string $key, int $newestSourceMtime): ?string |
| 86 | { |
| 87 | $file = $this->path($key); |
| 88 | |
| 89 | if (!file_exists($file)) { |
| 90 | return null; |
| 91 | } |
| 92 | |
| 93 | if (($newestSourceMtime > 0) && (filemtime($file) < $newestSourceMtime)) { |
| 94 | return null; |
| 95 | } |
| 96 | |
| 97 | $content = file_get_contents($file); |
| 98 | |
| 99 | return ($content === false) ? null : $content; |
| 100 | } |
| 101 | |
| 102 | /** |
| 103 | * Write compiled source to the cache, atomically |
| 104 | * |
| 105 | * @param string $key |
| 106 | * @param string $source |
| 107 | * @throws Exception |
| 108 | * @return void |
| 109 | */ |
| 110 | public function put(string $key, string $source): void |
| 111 | { |
| 112 | if (!is_dir($this->dir) || !is_writable($this->dir)) { |
| 113 | throw new Exception("Error: The cache directory '" . $this->dir . "' does not exist or is not writable."); |
| 114 | } |
| 115 | |
| 116 | $file = $this->path($key); |
| 117 | $tmp = $file . '.' . uniqid('', true) . '.tmp'; |
| 118 | |
| 119 | if (@file_put_contents($tmp, $source) === false) { |
| 120 | throw new Exception("Error: Failed to write compiled template to '" . $tmp . "'."); |
| 121 | } |
| 122 | |
| 123 | if (!@rename($tmp, $file)) { |
| 124 | throw new Exception("Error: Failed to move compiled template into place at '" . $file . "'."); |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | } |