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<?php |
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/* |
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* This file is part of the "elao/api-resources-metadata" package. |
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* |
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* Copyright (C) 2016 Elao |
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* |
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* @author Elao <[email protected]> |
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*/ |
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namespace Elao\ApiResourcesMetadata\Resource; |
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use Elao\ApiResourcesMetadata\Exception\InvalidArgumentException; |
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use Elao\ApiResourcesMetadata\Resource\Locator\LocatorInterface; |
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use Psr\Cache\CacheItemPoolInterface; |
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class ResourceIndex |
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{ |
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/** |
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* @internal |
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*/ |
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const CACHE_KEY = 'elao.api_resources_metadata.indexed_resources'; |
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/** @var LocatorInterface[] */ |
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private $resourceLocators; |
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/** @var array */ |
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private $resourcesCache; |
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/** @var CacheItemPoolInterface|null */ |
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private $cache; |
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public function __construct(array $resourceLocators, CacheItemPoolInterface $cache = null) |
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{ |
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$this->resourceLocators = $resourceLocators; |
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$this->cache = $cache; |
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} |
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/** |
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* @return array resources classes indexed by short name |
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*/ |
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public function all(): array |
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{ |
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$this->locateResources(); |
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return $this->resourcesCache; |
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} |
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/** |
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* @param string $resource Resource class or short name |
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* |
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* @return bool True if the class or short name identifies an existing resource |
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*/ |
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public function has(string $resource): bool |
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{ |
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return isset($this->all()[$resource]) || in_array($resource, $this->all(), true); |
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} |
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/** |
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* @param string $resourceClass The resource FQCN |
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* |
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* @throws InvalidArgumentException When no resource found |
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* |
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* @return string The resource short name |
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*/ |
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public function getShortName(string $resourceClass): string |
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{ |
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if (!$this->has($resourceClass)) { |
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throw new InvalidArgumentException(sprintf('Class "%s" is not indexed as a resource.', $resourceClass)); |
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} |
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return array_search($resourceClass, $this->all(), true); |
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} |
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/** |
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* @param string $shortName The resource short name |
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* |
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* @throws InvalidArgumentException When no resource found |
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* |
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* @return string The resource FQCN |
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*/ |
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public function getResourceClass(string $shortName): string |
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{ |
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if (!$this->has($shortName)) { |
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throw new InvalidArgumentException(sprintf('"%s" is not indexed as a resource.', $shortName)); |
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} |
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return $this->all()[$shortName]; |
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} |
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private function locateResources() |
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{ |
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if (null !== $this->resourcesCache) { |
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return $this->resourcesCache; |
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} |
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if (null !== $this->cache && $this->cache->getItem(self::CACHE_KEY)->isHit()) { |
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return $this->resourcesCache = $this->cache->getItem(self::CACHE_KEY)->get(); |
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} |
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$this->resourcesCache = []; |
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foreach ($this->resourceLocators as $locator) { |
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$this->resourcesCache += $locator->locate(); |
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} |
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if (null !== $this->cache) { |
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$item = $this->cache->getItem(self::CACHE_KEY); |
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$item->set($this->resourcesCache); |
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$this->cache->save($item); |
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} |
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} |
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} |
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