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<?php |
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namespace Digia\Lumen\GraphQL; |
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use Youshido\GraphQL\Execution\Processor; |
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use Illuminate\Contracts\Cache\Repository as CacheRepository; |
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use Illuminate\Contracts\Filesystem\FileNotFoundException; |
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class GraphQLService |
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{ |
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/** |
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* The cache key used when caching processor instances |
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*/ |
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public const PROCESSOR_CACHE_KEY = 'graphql_processor'; |
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/** |
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* Path to graphql introspection file |
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*/ |
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public const INTROSPECTION_QUERY_PATH = 'graphql/Introspection.graphql'; |
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/** |
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* @var Processor |
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*/ |
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private $processor; |
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/** |
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* @var CacheRepository |
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*/ |
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private $cacheRepository; |
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/** |
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* GraphQLController constructor. |
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* |
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* @param Processor $processor |
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* @param CacheRepository $cacheRepository |
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*/ |
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public function __construct(Processor $processor, CacheRepository $cacheRepository) |
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{ |
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$this->processor = $processor; |
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$this->cacheRepository = $cacheRepository; |
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} |
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/** |
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* Processor instantiation takes a while so we cache the instance forever. The processor cache can be cleared by |
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* running "php artisan graphql:clear:processor:cache". |
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* |
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* @return Processor |
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*/ |
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public function getProcessor() |
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{ |
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$processor = $this->cacheRepository->get(self::PROCESSOR_CACHE_KEY); |
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if ($processor === null) { |
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$processor = $this->processor; |
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$this->cacheRepository->forever(self::PROCESSOR_CACHE_KEY, $processor); |
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} |
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return $processor; |
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} |
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/** |
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* Removes the currently cached processor instance, if any |
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*/ |
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public function forgetProcessor() |
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{ |
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$this->cacheRepository->forget(self::PROCESSOR_CACHE_KEY); |
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} |
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/** |
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* @param string $queryResourcePath |
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* @param array $variables |
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* |
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* @return array |
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* |
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* @throws \Exception |
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*/ |
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public function getStoredQueryResponse(string $queryResourcePath, array $variables = []): array |
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{ |
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return $this->getQueryResponse($this->getStoredQuery($queryResourcePath), $variables); |
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} |
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/** |
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* @param string $query |
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* @param array $variables (optional) |
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* |
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* @return array |
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* |
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* @throws \Exception any underlying exception that occurred while processing the request |
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*/ |
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private function getQueryResponse(string $query, array $variables = []): array |
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{ |
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$processor = $this->getProcessor(); |
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$response = $processor->processPayload($query, $variables)->getResponseData(); |
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// Re-throw exceptions, we are not technically doing GraphQL |
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if (isset($response['exceptions'])) { |
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throw $response['exceptions'][0]; |
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} |
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return $response; |
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} |
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/** |
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* @param string $resourcePath |
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* |
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* @return string |
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* |
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* @throws FileNotFoundException |
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*/ |
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private function getStoredQuery(string $resourcePath): string |
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{ |
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$path = resource_path($resourcePath); |
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if (!file_exists($path)) { |
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throw new FileNotFoundException('Could not find the specified query file'); |
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} |
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return file_get_contents($path); |
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} |
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} |
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digiaonline /
lumen-graphql
