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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\Cache\Adapter; |
| 16 | |
| 17 | /** |
| 18 | * Shared namespace/version key-building for adapters that scope clear()/destroy() to a namespace via |
| 19 | * generational versioning (Apc, Memcached, Redis) rather than wiping the whole shared backend |
| 20 | * |
| 21 | * Using classes must have a `protected string $namespace` property and implement fetchVersion() to read |
| 22 | * the raw version value back from their own backend. |
| 23 | * |
| 24 | * @category Pop |
| 25 | * @package Pop\Cache |
| 26 | * @author Nick Sagona, III <nick@popphp.org> |
| 27 | * @copyright Copyright (c) 2009-2026 Nick Sagona, III |
| 28 | * @license https://www.popphp.org/license New BSD License |
| 29 | * @version 5.0.0 |
| 30 | */ |
| 31 | trait NamespacedVersionedKeys |
| 32 | { |
| 33 | |
| 34 | /** |
| 35 | * Fetch the raw version value from the backend, or false if it isn't set |
| 36 | * |
| 37 | * @param string $key |
| 38 | * @return mixed |
| 39 | */ |
| 40 | abstract protected function fetchVersion(string $key): mixed; |
| 41 | |
| 42 | /** |
| 43 | * Get the storage key for this namespace's version counter |
| 44 | * |
| 45 | * @return string |
| 46 | */ |
| 47 | protected function versionKey(): string |
| 48 | { |
| 49 | return $this->namespace . '::version'; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Resolve the current version for this namespace, defaulting to 1 |
| 54 | * |
| 55 | * @return int |
| 56 | */ |
| 57 | protected function resolveVersion(): int |
| 58 | { |
| 59 | $version = $this->fetchVersion($this->versionKey()); |
| 60 | return ($version !== false) ? (int)$version : 1; |
| 61 | } |
| 62 | |
| 63 | /** |
| 64 | * Build the versioned, namespaced storage key for an item id |
| 65 | * |
| 66 | * @param string $id |
| 67 | * @return string |
| 68 | */ |
| 69 | protected function key(string $id): string |
| 70 | { |
| 71 | return $this->namespace . ':v' . $this->resolveVersion() . ':' . sha1($id); |
| 72 | } |
| 73 | |
| 74 | } |