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| 1 | <?php |
| 2 | |
| 3 | declare(strict_types=1); |
| 4 | |
| 5 | /** |
| 6 | * This file is part of php-fast-forward/config. |
| 7 | * |
| 8 | * This source file is subject to the license bundled |
| 9 | * with this source code in the file LICENSE. |
| 10 | * |
| 11 | * @link https://github.com/php-fast-forward/config |
| 12 | * @copyright Copyright (c) 2025 Felipe Sayão Lobato Abreu <github@mentordosnerds.com> |
| 13 | * @license https://opensource.org/licenses/MIT MIT License |
| 14 | */ |
| 15 | |
| 16 | namespace FastForward\Config; |
| 17 | |
| 18 | use Psr\SimpleCache\CacheInterface; |
| 19 | use Psr\SimpleCache\InvalidArgumentException; |
| 20 | |
| 21 | /** |
| 22 | * Class CachedConfig. |
| 23 | * |
| 24 | * Provides a cached implementation of a configuration source. |
| 25 | * This class MUST cache the configuration output of the decorated ConfigInterface instance. |
| 26 | * It SHALL lazily initialize and retrieve cached configuration data upon invocation. |
| 27 | */ |
| 28 | final class CachedConfig implements ConfigInterface |
| 29 | { |
| 30 | use LazyLoadConfigTrait; |
| 31 | |
| 32 | /** |
| 33 | * Constructs a CachedConfig wrapper. |
| 34 | * |
| 35 | * This constructor SHALL accept a PSR-16 cache implementation and a configuration instance |
| 36 | * to be cached. It MUST defer reading and writing the configuration until invoked. |
| 37 | * |
| 38 | * @param CacheInterface $cache the cache implementation used for storing configuration data |
| 39 | * @param ConfigInterface $defaultConfig the configuration source to be cached |
| 40 | * @param bool $persistent whether the cache should be persistent or not |
| 41 | * @param null|string $cacheKey the cache key to use for storing the configuration data |
| 42 | */ |
| 43 | public function __construct( |
| 44 | private readonly CacheInterface $cache, |
| 45 | private readonly ConfigInterface $defaultConfig, |
| 46 | private readonly bool $persistent = false, |
| 47 | private ?string $cacheKey = null, |
| 48 | ) { |
| 49 | $this->cacheKey ??= $this->defaultConfig::class; |
| 50 | } |
| 51 | |
| 52 | /** |
| 53 | * Invokes the configuration and returns the cached configuration data. |
| 54 | * |
| 55 | * If the configuration has not yet been cached, it MUST be stored in the cache upon first invocation. |
| 56 | * This method MUST return a ConfigInterface implementation containing the cached configuration data. |
| 57 | * |
| 58 | * @return ConfigInterface a ConfigInterface implementation containing the cached configuration data |
| 59 | * |
| 60 | * @throws InvalidArgumentException if the cache key is invalid |
| 61 | */ |
| 62 | public function __invoke(): ConfigInterface |
| 63 | { |
| 64 | if (!$this->cache->has($this->cacheKey)) { |
| 65 | $this->cache->set($this->cacheKey, $this->defaultConfig->toArray()); |
| 66 | } |
| 67 | |
| 68 | return new ArrayConfig($this->cache->get($this->cacheKey)); |
| 69 | } |
| 70 | |
| 71 | /** |
| 72 | * Sets configuration data. |
| 73 | * |
| 74 | * This method MUST update the cached configuration data in the cache if the persistent flag is set to true. |
| 75 | * |
| 76 | * @param array|ConfigInterface|string $key the configuration key or an array of key-value pairs to set |
| 77 | * @param mixed $value the value to set for the specified key |
| 78 | * |
| 79 | * @throws InvalidArgumentException if the key is invalid |
| 80 | */ |
| 81 | public function set(array|ConfigInterface|string $key, mixed $value = null): void |
| 82 | { |
| 83 | $config = $this->getConfig(); |
| 84 | $config->set($key, $value); |
| 85 | |
| 86 | if ($this->persistent) { |
| 87 | $this->cache->set($this->cacheKey, $config->toArray()); |
| 88 | } |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * Retrieves a configuration value by key. |
| 93 | * |
| 94 | * This method MUST return the cached value if it exists, or the default value if not found. |
| 95 | * |
| 96 | * @param string $key the configuration key to retrieve |
| 97 | * |
| 98 | * @return mixed the configuration value or the default value |
| 99 | */ |
| 100 | public function remove(mixed $key): void |
| 101 | { |
| 102 | $config = $this->getConfig(); |
| 103 | $config->remove($key); |
| 104 | |
| 105 | if ($this->persistent) { |
| 106 | $this->cache->set($this->cacheKey, $config->toArray()); |
| 107 | } |
| 108 | } |
| 109 | } |