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<?php |
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namespace Drupal\graphql\GraphQL\Execution; |
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use Drupal\Core\Cache\CacheableMetadata; |
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use Drupal\Core\Render\RenderContext; |
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use Drupal\Core\Render\RendererInterface; |
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use Drupal\Core\Session\AccountProxyInterface; |
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use Drupal\graphql\Plugin\SchemaPluginManager; |
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use Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface; |
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use GraphQL\Server\Helper; |
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use GraphQL\Server\OperationParams; |
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use GraphQL\Server\RequestError; |
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use GraphQL\Server\ServerConfig; |
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class QueryProcessor { |
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/** |
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* The current user account. |
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* |
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* @var \Drupal\Core\Session\AccountProxyInterface |
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*/ |
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protected $currentUser; |
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/** |
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* The graphql container parameters. |
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* |
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* @var array |
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*/ |
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protected $parameters; |
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/** |
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* The schema plugin manager. |
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* |
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* @var \Drupal\graphql\Plugin\SchemaPluginManager |
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*/ |
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protected $pluginManager; |
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/** |
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* The server helper. |
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* |
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* @var \GraphQL\Server\Helper |
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*/ |
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protected $helper; |
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/** |
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* The query provider service. |
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* |
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* @var \Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface |
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*/ |
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protected $queryProvider; |
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/** |
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* The renderer service. |
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* |
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* @var \Drupal\Core\Render\RendererInterface |
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*/ |
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protected $renderer; |
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/** |
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* Processor constructor. |
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* |
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* @param \Drupal\Core\Render\RendererInterface $renderer |
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* The renderer service. |
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* @param \Drupal\Core\Session\AccountProxyInterface $currentUser |
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* The current user. |
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* @param \Drupal\graphql\Plugin\SchemaPluginManager $pluginManager |
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* The schema plugin manager. |
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* @param \Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface $queryProvider |
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* The query provider service. |
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* @param array $parameters |
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* The graphql container parameters. |
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*/ |
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public function __construct( |
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RendererInterface $renderer, |
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AccountProxyInterface $currentUser, |
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SchemaPluginManager $pluginManager, |
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QueryProviderInterface $queryProvider, |
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array $parameters |
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) { |
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$this->renderer = $renderer; |
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$this->currentUser = $currentUser; |
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$this->pluginManager = $pluginManager; |
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$this->queryProvider = $queryProvider; |
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$this->parameters = $parameters; |
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$this->helper = new Helper(); |
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} |
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/** |
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* Processes one or multiple graphql operations. |
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* |
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* @param string $schema |
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* The name of the schema to execute. |
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* @param \GraphQL\Server\OperationParams|\GraphQL\Server\OperationParams[] $operations |
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* The graphql operation(s) to execute. |
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* @param mixed $context |
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* The context for the query. |
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* |
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* @return \Drupal\graphql\GraphQL\Execution\QueryResult |
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* The query result. |
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*/ |
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public function processQuery($schema, $operations, $context = NULL) { |
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$debug = !empty($this->parameters['development']); |
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// Load the plugin from the schema manager. |
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$plugin = $this->pluginManager->createInstance($schema); |
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$schema = $plugin->getSchema(); |
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// Create the server config. |
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$server = ServerConfig::create(); |
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$server->setDebug($debug); |
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$server->setSchema($schema); |
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$server->setContext($context); |
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$server->setQueryBatching(TRUE); |
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$server->setPersistentQueryLoader(function ($id, OperationParams $operation) { |
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if ($query = $this->queryProvider->getQuery($id, $operation)) { |
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return $query; |
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} |
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throw new RequestError(sprintf("Failed to load query map for id '%s'.", $id)); |
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}); |
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return $this->executeQuery($server, $operations); |
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} |
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/** |
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* Executes one or multiple graphql operations. |
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* |
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* @param \GraphQL\Server\ServerConfig $server |
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* The graphql server config. |
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* @param \GraphQL\Server\OperationParams|\GraphQL\Server\OperationParams[] $operations |
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* The graphql operation(s) to execute. |
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* |
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* @return \Drupal\graphql\GraphQL\Execution\QueryResult |
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* The result of executing the operations. |
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*/ |
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protected function executeQuery(ServerConfig $server, $operations) { |
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// Evaluating the request might lead to rendering of markup which in turn |
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// might "leak" cache metadata. Therefore, we execute the request within a |
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// render context and collect the leaked metadata afterwards. |
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$context = new RenderContext(); |
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/** @var \GraphQL\Executor\ExecutionResult|\GraphQL\Executor\ExecutionResult[] $result */ |
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$result = $this->renderer->executeInRenderContext($context, function() use ($server, $operations) { |
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if (is_array($operations)) { |
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return $this->helper->executeBatch($server, $operations); |
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} |
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return $this->helper->executeOperation($server, $operations); |
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}); |
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$metadata = new CacheableMetadata(); |
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// Apply render context cache metadata to the response. |
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if (!$context->isEmpty()) { |
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$metadata->addCacheableDependency($context->pop()); |
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} |
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return new QueryResult($result, $metadata); |
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} |
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} |
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drupal-graphql /
graphql
