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| 1 | <?php |
| 2 | |
| 3 | /** |
| 4 | * Filesystem-backed configuration cache |
| 5 | * |
| 6 | * Caches the faqconfig rows in the PSR-6 filesystem pool so installs without Redis |
| 7 | * do not scan the full configuration table on every request. Writes through the |
| 8 | * HybridConfigurationStore invalidate the cache; a short TTL bounds staleness for |
| 9 | * multi-server setups where another node changes the configuration. |
| 10 | * |
| 11 | * This Source Code Form is subject to the terms of the Mozilla Public License, |
| 12 | * v. 2.0. If a copy of the MPL was not distributed with this file, You can |
| 13 | * obtain one at https://mozilla.org/MPL/2.0/. |
| 14 | * |
| 15 | * @package phpMyFAQ |
| 16 | * @author Thorsten Rinne <thorsten@phpmyfaq.de> |
| 17 | * @copyright 2026 phpMyFAQ Team |
| 18 | * @license https://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0 |
| 19 | * @link https://www.phpmyfaq.de |
| 20 | * @since 2026-07-14 |
| 21 | */ |
| 22 | |
| 23 | declare(strict_types=1); |
| 24 | |
| 25 | namespace phpMyFAQ\Configuration\Storage; |
| 26 | |
| 27 | use Symfony\Component\Cache\Adapter\FilesystemAdapter; |
| 28 | |
| 29 | final class FilesystemConfigurationCache |
| 30 | { |
| 31 | private const string CACHE_KEY = 'configuration-rows'; |
| 32 | |
| 33 | private const int DEFAULT_TTL = 300; |
| 34 | |
| 35 | private readonly FilesystemAdapter $adapter; |
| 36 | |
| 37 | /** |
| 38 | * @param string $identity Distinguishes tenants sharing one cache directory |
| 39 | * (multisite config dir, table prefix, table name). |
| 40 | */ |
| 41 | public function __construct(string $cacheDir, string $identity, int $ttl = self::DEFAULT_TTL) |
| 42 | { |
| 43 | $this->adapter = new FilesystemAdapter( |
| 44 | namespace: 'pmf-config-' . substr(md5($identity), offset: 0, length: 12), |
| 45 | defaultLifetime: $ttl, |
| 46 | directory: $cacheDir, |
| 47 | ); |
| 48 | } |
| 49 | |
| 50 | /** |
| 51 | * Returns null (disabled) in debug mode or when CONFIG_CACHE_ENABLED is falsy. |
| 52 | */ |
| 53 | public static function createIfEnabled(bool $debug, mixed $enabled, string $cacheDir, string $identity): ?self |
| 54 | { |
| 55 | if ($debug) { |
| 56 | return null; |
| 57 | } |
| 58 | |
| 59 | if (!filter_var($enabled ?? 'true', FILTER_VALIDATE_BOOLEAN)) { |
| 60 | return null; |
| 61 | } |
| 62 | |
| 63 | return new self($cacheDir, $identity); |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * Returns the cached configuration rows, or null on a cache miss. |
| 68 | * |
| 69 | * @return array<int, \stdClass>|null |
| 70 | */ |
| 71 | public function read(): ?array |
| 72 | { |
| 73 | $item = $this->adapter->getItem(self::CACHE_KEY); |
| 74 | if (!$item->isHit()) { |
| 75 | return null; |
| 76 | } |
| 77 | |
| 78 | /** @var mixed $payload */ |
| 79 | $payload = $item->get(); |
| 80 | if (!is_array($payload) || $payload === []) { |
| 81 | return null; |
| 82 | } |
| 83 | |
| 84 | $rows = []; |
| 85 | /** @var mixed $entry */ |
| 86 | foreach ($payload as $entry) { |
| 87 | if (!is_array($entry) || !array_key_exists('config_name', $entry) || $entry['config_name'] === null) { |
| 88 | return null; |
| 89 | } |
| 90 | |
| 91 | $rows[] = (object) [ |
| 92 | 'config_name' => (string) $entry['config_name'], |
| 93 | 'config_value' => (string) ($entry['config_value'] ?? ''), |
| 94 | ]; |
| 95 | } |
| 96 | |
| 97 | return $rows; |
| 98 | } |
| 99 | |
| 100 | /** |
| 101 | * @param array<int, \stdClass> $rows |
| 102 | */ |
| 103 | public function warm(array $rows): void |
| 104 | { |
| 105 | $payload = []; |
| 106 | foreach ($rows as $row) { |
| 107 | if (!property_exists($row, 'config_name') || $row->config_name === null) { |
| 108 | continue; |
| 109 | } |
| 110 | |
| 111 | $payload[] = [ |
| 112 | 'config_name' => (string) $row->config_name, |
| 113 | 'config_value' => (string) ($row->config_value ?? ''), |
| 114 | ]; |
| 115 | } |
| 116 | |
| 117 | if ($payload === []) { |
| 118 | return; |
| 119 | } |
| 120 | |
| 121 | $item = $this->adapter->getItem(self::CACHE_KEY); |
| 122 | $item->set($payload); |
| 123 | $this->adapter->save($item); |
| 124 | } |
| 125 | |
| 126 | public function clear(): void |
| 127 | { |
| 128 | $this->adapter->deleteItem(self::CACHE_KEY); |
| 129 | } |
| 130 | } |