QueryProcessor::executeOperation() - Code Metrics - Inspection of "Refactoring towards webonyx/graphql-php." - drupal-graphql/graphql - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — 8.x-3.x (#525)

by Sebastian

created 2018-03-02 18:15 UTC

QueryProcessor::executeOperation() C

↳ Parent: QueryProcessor

Complexity

Conditions	13
Paths	86

Size

Total Lines	48
Code Lines	24

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	13
eloc	24
nc	86
nop	4
dl	0
loc	48
rs	5.0877
c	0
b	0
f	0

How to fix Complexity

<?php

namespace Drupal\graphql\GraphQL\Execution;

use Drupal\Core\Cache\CacheableMetadata;
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Cache\Context\CacheContextsManager;
use Drupal\Core\Session\AccountProxyInterface;
use Drupal\graphql\GraphQL\Visitors\CacheContextsCollector;
use Drupal\graphql\Plugin\SchemaPluginManager;
use Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface;
use GraphQL\Error\Error;
use GraphQL\Error\FormattedError;
use GraphQL\Executor\ExecutionResult;
use GraphQL\Executor\Executor;
use GraphQL\Executor\Promise\Adapter\SyncPromiseAdapter;
use GraphQL\Executor\Promise\PromiseAdapter;
use GraphQL\Language\AST\DocumentNode;
use GraphQL\Language\Parser;
use GraphQL\Language\Visitor;
use GraphQL\Server\Helper;
use GraphQL\Server\OperationParams;
use GraphQL\Server\RequestError;
use GraphQL\Server\ServerConfig;
use GraphQL\Utils\AST;
use GraphQL\Utils\TypeInfo;
use GraphQL\Utils\Utils;
use GraphQL\Validator\DocumentValidator;
use GraphQL\Validator\Rules\AbstractValidationRule;
use GraphQL\Validator\ValidationContext;

class QueryProcessor {

  /**
   * The current user account.
   *
   * @var \Drupal\Core\Session\AccountProxyInterface
   */
  protected $currentUser;

  /**
   * The schema plugin manager.
   *
   * @var \Drupal\graphql\Plugin\SchemaPluginManager
   */
  protected $pluginManager;

  /**
   * The query provider service.
   *
   * @var \Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface
   */
  protected $queryProvider;

  /**
   * The cache backend for caching query results.
   *
   * @var \Drupal\Core\Cache\CacheBackendInterface
   */
  protected $cacheBackend;

  /**
   * The cache contexts manager service.
   *
   * @var \Drupal\Core\Cache\Context\CacheContextsManager
   */
  protected $contextsManager;

  /**
   * Processor constructor.
   *
   * @param \Drupal\Core\Session\AccountProxyInterface $currentUser
   *   The current user.
   * @param \Drupal\Core\Cache\Context\CacheContextsManager $contextsManager
   *   The cache contexts manager service.
   * @param \Drupal\graphql\Plugin\SchemaPluginManager $pluginManager
   *   The schema plugin manager.
   * @param \Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface $queryProvider
   *   The query provider service.
   * @param \Drupal\Core\Cache\CacheBackendInterface $cacheBackend
   *   The cache backend for caching query results.
   */
  public function __construct(
    AccountProxyInterface $currentUser,
    CacheContextsManager $contextsManager,
    SchemaPluginManager $pluginManager,
    QueryProviderInterface $queryProvider,
    CacheBackendInterface $cacheBackend
  ) {
    $this->currentUser = $currentUser;
    $this->contextsManager = $contextsManager;
    $this->pluginManager = $pluginManager;
    $this->queryProvider = $queryProvider;
    $this->cacheBackend = $cacheBackend;
  }

  /**
   * Processes one or multiple graphql operations.
   *
   * @param string $schema
   *   The plugin id of the schema to use.
   * @param \GraphQL\Server\OperationParams|\GraphQL\Server\OperationParams[] $params
   *   The graphql operation(s) to execute.
   * @param array $globals
   *   The query context.
   *
   * @return \Drupal\graphql\GraphQL\Execution\QueryResult|\Drupal\graphql\GraphQL\Execution\QueryResult[]
   *   The query result.
   *
   */
  public function processQuery($schema, $params, array $globals = []) {
    // Load the plugin from the schema manager.
    $plugin = $this->pluginManager->createInstance($schema);
    $schema = $plugin->getSchema();

    // If the current user has appropriate permissions, allow to bypass
    // the secure fields restriction.
    $globals['bypass field security'] = $this->currentUser->hasPermission('bypass graphql field security');

    // Create the server config.
    $config = ServerConfig::create();
    $config->setDebug(!empty($globals['development']));
    $config->setSchema($schema);
    $config->setQueryBatching(TRUE);
    $config->setContext(function () use ($globals) {
      // Each document (e.g. in a batch query) gets its own resolve context but
      // the global parameters are shared. This allows us to collect the cache
      // metadata and contextual values (e.g. inheritance for language) for each
      // query separately.
      return new ResolveContext($globals);
    });

    $config->setValidationRules(function (OperationParams $params, DocumentNode $document, $operation) {

      if (isset($params->queryId)) {
        // Assume that pre-parsed documents are already validated. This allows
        // us to store pre-validated query documents e.g. for persisted queries
        // effectively improving performance by skipping run-time validation.
        return [];
      }

      return array_values(DocumentValidator::defaultRules());
    });

    $config->setPersistentQueryLoader(function ($id, OperationParams $params) {
      if ($query = $this->queryProvider->getQuery($id, $params)) {
        return $query;
      }

      throw new RequestError(sprintf("Failed to load query map for id '%s'.", $id));
    });

    if (is_array($params)) {
      return $this->executeBatch($config, $params);
    }

    return $this->executeSingle($config, $params);
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   *
   * @return mixed
   */
  public function executeSingle(ServerConfig $config, OperationParams $params) {
    $adapter = new SyncPromiseAdapter();
    $result = $this->executeOperationWithReporting($adapter, $config, $params, FALSE);
    return $adapter->wait($result);
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param array $params
   *
   * @return mixed
   */
  public function executeBatch(ServerConfig $config, array $params) {
    $adapter = new SyncPromiseAdapter();
    $result = array_map(function ($params) use ($adapter, $config) {
      return $this->executeOperationWithReporting($adapter, $config, $params, TRUE);
    }, $params);

    $result = $adapter->all($result);
    return $adapter->wait($result);
  }

  /**
   * @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param bool $batching
   *
   * @return \GraphQL\Executor\Promise\Promise
   */
  protected function executeOperationWithReporting(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, $batching = FALSE) {
    $result = $this->executeOperation($adapter, $config, $params, $batching);

    // Format and print errors.
    return $result->then(function(QueryResult $result) use ($config) {
      if ($config->getErrorsHandler()) {
        $result->setErrorsHandler($config->getErrorsHandler());
      }

      if ($config->getErrorFormatter() || $config->getDebug()) {
        $result->setErrorFormatter(FormattedError::prepareFormatter($config->getErrorFormatter(), $config->getDebug()));
      }

      return $result;
    });
  }

  /**
   * @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param bool $batching
   *
   * @return \GraphQL\Executor\Promise\Promise
   */
  protected function executeOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, $batching = FALSE) {
    try {
      if (!$config->getSchema()) {
        throw new \LogicException('Missing schema for query execution.');
      }

      if ($batching && !$config->getQueryBatching()) {
        throw new RequestError('Batched queries are not supported by this server.');
      }

      if ($errors = $this->validateOperationParams($params)) {
        return $adapter->createFulfilled(new QueryResult(NULL, $errors));
      }

      $document = $params->queryId ? $this->loadPersistedQuery($config, $params) : $params->query;
      if (!$document instanceof DocumentNode) {
        $document = Parser::parse($document);
      }

      // Read the operation type from the document. Subscriptions and mutations
      // only work through POST requests. One cannot have mutations and queries
      // in the same document, hence this check is sufficient.
      $operation = $params->operation;
      $type = AST::getOperation($document, $operation);
      if ($params->isReadOnly() && $type !== 'query') {
        throw new RequestError('GET requests are only supported for query operations.');
      }

      // If one of the validation rules found any problems, do not resolve the
      // query and bail out early instead.
      if ($errors = $this->validateOperation($config, $params, $document)) {
        return $adapter->createFulfilled(new QueryResult(NULL, $errors));
      }

      // Only queries can be cached (mutations and subscriptions can't).
      if ($type === 'query') {
        return $this->executeCacheableOperation($adapter, $config, $params, $document);
      }

      return $this->executeUncachableOperation($adapter, $config, $params, $document);
    }
    catch (RequestError $exception) {
      return $adapter->createFulfilled(new QueryResult(NULL, [Error::createLocatedError($exception)]));
    }
    catch (Error $exception) {
      return $adapter->createFulfilled(new QueryResult(NULL, [$exception]));
    }
  }

  /**
   * @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   *
   * @return \GraphQL\Executor\Promise\Promise|mixed
   */
  protected function executeCacheableOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, DocumentNode $document) {
    $schema = $config->getSchema();

    // Collect cache contexts from the query document.
    $contexts = [];
    $info = new TypeInfo($schema);
    $visitor = (new CacheContextsCollector())->getVisitor($info, $contexts);
    Visitor::visit($document, Visitor::visitWithTypeInfo($info, $visitor));

    // Generate a cache identifier from the collected contexts.
    $metadata = (new CacheableMetadata())->addCacheContexts($contexts);
    $cid = $this->cacheIdentifier($document, $metadata);
    if (($cache = $this->cacheBackend->get($cid)) && $result = $cache->data) {
      return $adapter->createFulfilled($result);
    }

    $result = $this->doExecuteOperation($adapter, $config, $params, $document);
    return $result->then(function (QueryResult $result) use ($cid, $metadata) {
      if ($missing = array_diff($result->getCacheContexts(), $metadata->getCacheContexts())) {
        throw new \LogicException(sprintf(
          'The query result yielded cache contexts (%s) that were not part of the static query analysis.',
          implode(', ', $missing)
        ));
      }

      // Add the statically collected cache contexts and the global default
      // cache tag (useful for clearing all cached responses) to the result.
      $result->addCacheableDependency($metadata);
      $result->addCacheTags(['graphql_response']);

      // Write this query into the cache if it is cacheable.
      if ($result->getCacheMaxAge() !== 0) {
        $this->cacheBackend->set($cid, $result, $result->getCacheMaxAge(), $result->getCacheTags());
      }

      return $result;
    });
  }

  /**
   * @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   *
   * @return \GraphQL\Executor\Promise\Promise
   */
  protected function executeUncachableOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, DocumentNode $document) {
    return $this->doExecuteOperation($adapter, $config, $params, $document);
  }

  /**
   * @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   *
   * @return \GraphQL\Executor\Promise\Promise
   */
  protected function doExecuteOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, DocumentNode $document) {
    $operation = $params->operation;
    $variables = $params->variables;
    $context = $this->resolveContextValue($config, $params, $document, $operation);
    $root = $this->resolveRootValue($config, $params, $document, $operation);
    $resolver = $config->getFieldResolver();
    $schema = $config->getSchema();

    $promise = Executor::promiseToExecute(
      $adapter,
      $schema,
      $document,
      $root,
      $context,
      $variables,
      $operation,
      $resolver
    );

    return $promise->then(function (ExecutionResult $result) use ($context) {
      // Add the collected cache metadata to the result.
      $metadata = (new CacheableMetadata())->addCacheableDependency($context);
      $output = new QueryResult($result->data, $result->errors, $result->extensions, $metadata);

      return $output;
    });
  }

  /**
   * @param \GraphQL\Server\OperationParams $params
   *
   * @return array
   */
  protected function validateOperationParams(OperationParams $params) {
    $errors = (new Helper())->validateOperationParams($params);
    return array_map(function (RequestError $error) {
      return Error::createLocatedError($error, NULL, NULL);
    }, $errors);
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   *
   * @return \GraphQL\Error\Error[]
   */
  protected function validateOperation(ServerConfig $config, OperationParams $params, DocumentNode $document) {
    $operation = $params->operation;
    // Skip validation if there are no validation rules to be applied.
    if (!$rules = $this->resolveValidationRules($config, $params, $document, $operation)) {
      return [];
    }

    $schema = $config->getSchema();
    $info = new TypeInfo($schema);
    $validation = new ValidationContext($schema, $document, $info);
    $visitors = array_values(array_map(function (AbstractValidationRule $rule) use ($validation) {
      return $rule($validation);
    }, $rules));

    // Run the query visitor with the prepared validation rules and the cache
    // metadata collector and query complexity calculator.
    Visitor::visit($document, Visitor::visitWithTypeInfo($info, Visitor::visitInParallel($visitors)));

    // Return any possible errors collected during validation.
    return $validation->getErrors();
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   * @param $operation
   *
   * @return mixed
   */
  protected function resolveRootValue(ServerConfig $config, OperationParams $params, DocumentNode $document, $operation) {

    $root = $config->getRootValue();
    if (is_callable($root)) {
      $root = $root($params, $document, $operation);
    }

    return $root;
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   * @param $operation
   *
   * @return mixed
   */
  protected function resolveContextValue(ServerConfig $config, OperationParams $params, DocumentNode $document, $operation) {

    $context = $config->getContext();
    if (is_callable($context)) {
      $context = $context($params, $document, $operation);
    }

    return $context;
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   * @param \GraphQL\Language\AST\DocumentNode $document
   * @param $operation
   *
   * @return array
   */
  protected function resolveValidationRules(ServerConfig $config, OperationParams $params, DocumentNode $document, $operation) {
    // Allow customizing validation rules per operation:
    $rules = $config->getValidationRules();
    if (is_callable($rules)) {
      $rules = $rules($params, $document, $operation);
      if (!is_array($rules)) {
        throw new \LogicException(sprintf("Expecting validation rules to be array or callable returning array, but got: %s", Utils::printSafe($rules)));
      }
    }

    return $rules;
  }

  /**
   * @param \GraphQL\Server\ServerConfig $config
   * @param \GraphQL\Server\OperationParams $params
   *
   * @return mixed
   * @throws \GraphQL\Server\RequestError
   */
  protected function loadPersistedQuery(ServerConfig $config, OperationParams $params) {
    if (!$loader = $config->getPersistentQueryLoader()) {
      throw new RequestError('Persisted queries are not supported by this server.');
    }

    $source = $loader($params->queryId, $params);
    if (!is_string($source) && !$source instanceof DocumentNode) {
      throw new \LogicException(sprintf('The persisted query loader must return query string or instance of %s but got: %s.', DocumentNode::class, Utils::printSafe($source)));
    }

    return $source;
  }

  /**
   * @param \GraphQL\Language\AST\DocumentNode $document
   *
   * @return array
   */
  protected function serializeDocument(DocumentNode $document) {
    return $this->sanitizeRecursive(AST::toArray($document));
  }

  /**
   * @param array $item
   *
   * @return array
   */
  protected function sanitizeRecursive(array $item) {
    unset($item['loc']);

    foreach ($item as &$value) {
      if (is_array($value)) {
        $value = $this->sanitizeRecursive($value);
      }
    }

    return $item;
  }

  /**
   * @param \GraphQL\Language\AST\DocumentNode $document
   * @param \Drupal\Core\Cache\CacheableMetadata $metadata
   *
   * @return string
   */
  protected function cacheIdentifier(DocumentNode $document, CacheableMetadata $metadata) {
    $contexts = $metadata->getCacheContexts();
    $keys = $this->contextsManager->convertTokensToKeys($contexts)->getKeys();
    // Prepend the hash of the serialized document to the cache contexts.
    $hash = hash('sha256', json_encode($this->serializeDocument($document)));
    return implode(':', array_values(array_merge([$hash], $keys)));
  }
}


1		<?php
2
3		namespace Drupal\graphql\GraphQL\Execution;
4
5		use Drupal\Core\Cache\CacheableMetadata;
6		use Drupal\Core\Cache\CacheBackendInterface;
7		use Drupal\Core\Cache\Context\CacheContextsManager;
8		use Drupal\Core\Session\AccountProxyInterface;
9		use Drupal\graphql\GraphQL\Visitors\CacheContextsCollector;
10		use Drupal\graphql\Plugin\SchemaPluginManager;
11		use Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface;
12		use GraphQL\Error\Error;
13		use GraphQL\Error\FormattedError;
14		use GraphQL\Executor\ExecutionResult;
15		use GraphQL\Executor\Executor;
16		use GraphQL\Executor\Promise\Adapter\SyncPromiseAdapter;
17		use GraphQL\Executor\Promise\PromiseAdapter;
18		use GraphQL\Language\AST\DocumentNode;
19		use GraphQL\Language\Parser;
20		use GraphQL\Language\Visitor;
21		use GraphQL\Server\Helper;
22		use GraphQL\Server\OperationParams;
23		use GraphQL\Server\RequestError;
24		use GraphQL\Server\ServerConfig;
25		use GraphQL\Utils\AST;
26		use GraphQL\Utils\TypeInfo;
27		use GraphQL\Utils\Utils;
28		use GraphQL\Validator\DocumentValidator;
29		use GraphQL\Validator\Rules\AbstractValidationRule;
30		use GraphQL\Validator\ValidationContext;
31
32		class QueryProcessor {
33
34		/**
35		* The current user account.
36		*
37		* @var \Drupal\Core\Session\AccountProxyInterface
38		*/
39		protected $currentUser;
40
41		/**
42		* The schema plugin manager.
43		*
44		* @var \Drupal\graphql\Plugin\SchemaPluginManager
45		*/
46		protected $pluginManager;
47
48		/**
49		* The query provider service.
50		*
51		* @var \Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface
52		*/
53		protected $queryProvider;
54
55		/**
56		* The cache backend for caching query results.
57		*
58		* @var \Drupal\Core\Cache\CacheBackendInterface
59		*/
60		protected $cacheBackend;
61
62		/**
63		* The cache contexts manager service.
64		*
65		* @var \Drupal\Core\Cache\Context\CacheContextsManager
66		*/
67		protected $contextsManager;
68
69		/**
70		* Processor constructor.
71		*
72		* @param \Drupal\Core\Session\AccountProxyInterface $currentUser
73		* The current user.
74		* @param \Drupal\Core\Cache\Context\CacheContextsManager $contextsManager
75		* The cache contexts manager service.
76		* @param \Drupal\graphql\Plugin\SchemaPluginManager $pluginManager
77		* The schema plugin manager.
78		* @param \Drupal\graphql\GraphQL\QueryProvider\QueryProviderInterface $queryProvider
79		* The query provider service.
80		* @param \Drupal\Core\Cache\CacheBackendInterface $cacheBackend
81		* The cache backend for caching query results.
82		*/
83		public function __construct(
84		AccountProxyInterface $currentUser,
85		CacheContextsManager $contextsManager,
86		SchemaPluginManager $pluginManager,
87		QueryProviderInterface $queryProvider,
88		CacheBackendInterface $cacheBackend
89		) {
90		$this->currentUser = $currentUser;
91		$this->contextsManager = $contextsManager;
92		$this->pluginManager = $pluginManager;
93		$this->queryProvider = $queryProvider;
94		$this->cacheBackend = $cacheBackend;
95		}
96
97		/**
98		* Processes one or multiple graphql operations.
99		*
100		* @param string $schema
101		* The plugin id of the schema to use.
102		* @param \GraphQL\Server\OperationParams\|\GraphQL\Server\OperationParams[] $params
103		* The graphql operation(s) to execute.
104		* @param array $globals
105		* The query context.
106		*
107		* @return \Drupal\graphql\GraphQL\Execution\QueryResult\|\Drupal\graphql\GraphQL\Execution\QueryResult[]
108		* The query result.
109		*
110		*/
111		public function processQuery($schema, $params, array $globals = []) {
112		// Load the plugin from the schema manager.
113		$plugin = $this->pluginManager->createInstance($schema);
114		$schema = $plugin->getSchema();
115
116		// If the current user has appropriate permissions, allow to bypass
117		// the secure fields restriction.
118		$globals['bypass field security'] = $this->currentUser->hasPermission('bypass graphql field security');
119
120		// Create the server config.
121		$config = ServerConfig::create();
122		$config->setDebug(!empty($globals['development']));
123		$config->setSchema($schema);
124		$config->setQueryBatching(TRUE);
125		$config->setContext(function () use ($globals) {
126		// Each document (e.g. in a batch query) gets its own resolve context but
127		// the global parameters are shared. This allows us to collect the cache
128		// metadata and contextual values (e.g. inheritance for language) for each
129		// query separately.
130		return new ResolveContext($globals);
131		});
132
133		$config->setValidationRules(function (OperationParams $params, DocumentNode $document, $operation) {
		0 ignored issues – show Unused Code introduced 2018-02-24 19:21 UTC by Report Bug Copy Issue Report The parameter `$document` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history... Unused Code introduced 2018-02-24 19:21 UTC by Report Bug Copy Issue Report The parameter `$operation` is not used and could be removed. This check looks from parameters that have been defined for a function or method, but which are not used in the method body. Loading history...
134		if (isset($params->queryId)) {
135		// Assume that pre-parsed documents are already validated. This allows
136		// us to store pre-validated query documents e.g. for persisted queries
137		// effectively improving performance by skipping run-time validation.
138		return [];
139		}
140
141		return array_values(DocumentValidator::defaultRules());
142		});
143
144		$config->setPersistentQueryLoader(function ($id, OperationParams $params) {
145		if ($query = $this->queryProvider->getQuery($id, $params)) {
146		return $query;
147		}
148
149		throw new RequestError(sprintf("Failed to load query map for id '%s'.", $id));
150		});
151
152		if (is_array($params)) {
153		return $this->executeBatch($config, $params);
154		}
155
156		return $this->executeSingle($config, $params);
157		}
158
159		/**
160		* @param \GraphQL\Server\ServerConfig $config
161		* @param \GraphQL\Server\OperationParams $params
162		*
163		* @return mixed
164		*/
165		public function executeSingle(ServerConfig $config, OperationParams $params) {
166		$adapter = new SyncPromiseAdapter();
167		$result = $this->executeOperationWithReporting($adapter, $config, $params, FALSE);
168		return $adapter->wait($result);
169		}
170
171		/**
172		* @param \GraphQL\Server\ServerConfig $config
173		* @param array $params
174		*
175		* @return mixed
176		*/
177		public function executeBatch(ServerConfig $config, array $params) {
178		$adapter = new SyncPromiseAdapter();
179		$result = array_map(function ($params) use ($adapter, $config) {
180		return $this->executeOperationWithReporting($adapter, $config, $params, TRUE);
181		}, $params);
182
183		$result = $adapter->all($result);
184		return $adapter->wait($result);
185		}
186
187		/**
188		* @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
189		* @param \GraphQL\Server\ServerConfig $config
190		* @param \GraphQL\Server\OperationParams $params
191		* @param bool $batching
192		*
193		* @return \GraphQL\Executor\Promise\Promise
194		*/
195		protected function executeOperationWithReporting(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, $batching = FALSE) {
196		$result = $this->executeOperation($adapter, $config, $params, $batching);
197
198		// Format and print errors.
199		return $result->then(function(QueryResult $result) use ($config) {
200		if ($config->getErrorsHandler()) {
201		$result->setErrorsHandler($config->getErrorsHandler());
202		}
203
204		if ($config->getErrorFormatter() \|\| $config->getDebug()) {
205		$result->setErrorFormatter(FormattedError::prepareFormatter($config->getErrorFormatter(), $config->getDebug()));
206		}
207
208		return $result;
209		});
210		}
211
212		/**
213		* @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
214		* @param \GraphQL\Server\ServerConfig $config
215		* @param \GraphQL\Server\OperationParams $params
216		* @param bool $batching
217		*
218		* @return \GraphQL\Executor\Promise\Promise
219		*/
220		protected function executeOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, $batching = FALSE) {
221		try {
222		if (!$config->getSchema()) {
223		throw new \LogicException('Missing schema for query execution.');
224		}
225
226		if ($batching && !$config->getQueryBatching()) {
227		throw new RequestError('Batched queries are not supported by this server.');
228		}
229
230		if ($errors = $this->validateOperationParams($params)) {
231		return $adapter->createFulfilled(new QueryResult(NULL, $errors));
232		}
233
234		$document = $params->queryId ? $this->loadPersistedQuery($config, $params) : $params->query;
235		if (!$document instanceof DocumentNode) {
236		$document = Parser::parse($document);
237		}
238
239		// Read the operation type from the document. Subscriptions and mutations
240		// only work through POST requests. One cannot have mutations and queries
241		// in the same document, hence this check is sufficient.
242		$operation = $params->operation;
243		$type = AST::getOperation($document, $operation);
244		if ($params->isReadOnly() && $type !== 'query') {
245		throw new RequestError('GET requests are only supported for query operations.');
246		}
247
248		// If one of the validation rules found any problems, do not resolve the
249		// query and bail out early instead.
250		if ($errors = $this->validateOperation($config, $params, $document)) {
251		return $adapter->createFulfilled(new QueryResult(NULL, $errors));
252		}
253
254		// Only queries can be cached (mutations and subscriptions can't).
255		if ($type === 'query') {
256		return $this->executeCacheableOperation($adapter, $config, $params, $document);
257		}
258
259		return $this->executeUncachableOperation($adapter, $config, $params, $document);
260		}
261		catch (RequestError $exception) {
262		return $adapter->createFulfilled(new QueryResult(NULL, [Error::createLocatedError($exception)]));
263		}
264		catch (Error $exception) {
265		return $adapter->createFulfilled(new QueryResult(NULL, [$exception]));
266		}
267		}
268
269		/**
270		* @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
271		* @param \GraphQL\Server\ServerConfig $config
272		* @param \GraphQL\Server\OperationParams $params
273		* @param \GraphQL\Language\AST\DocumentNode $document
274		*
275		* @return \GraphQL\Executor\Promise\Promise\|mixed
276		*/
277		protected function executeCacheableOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, DocumentNode $document) {
278		$schema = $config->getSchema();
279
280		// Collect cache contexts from the query document.
281		$contexts = [];
282		$info = new TypeInfo($schema);
283		$visitor = (new CacheContextsCollector())->getVisitor($info, $contexts);
284		Visitor::visit($document, Visitor::visitWithTypeInfo($info, $visitor));
285
286		// Generate a cache identifier from the collected contexts.
287		$metadata = (new CacheableMetadata())->addCacheContexts($contexts);
288		$cid = $this->cacheIdentifier($document, $metadata);
289		if (($cache = $this->cacheBackend->get($cid)) && $result = $cache->data) {
290		return $adapter->createFulfilled($result);
291		}
292
293		$result = $this->doExecuteOperation($adapter, $config, $params, $document);
294		return $result->then(function (QueryResult $result) use ($cid, $metadata) {
295		if ($missing = array_diff($result->getCacheContexts(), $metadata->getCacheContexts())) {
296		throw new \LogicException(sprintf(
297		'The query result yielded cache contexts (%s) that were not part of the static query analysis.',
298		implode(', ', $missing)
299		));
300		}
301
302		// Add the statically collected cache contexts and the global default
303		// cache tag (useful for clearing all cached responses) to the result.
304		$result->addCacheableDependency($metadata);
305		$result->addCacheTags(['graphql_response']);
306
307		// Write this query into the cache if it is cacheable.
308		if ($result->getCacheMaxAge() !== 0) {
309		$this->cacheBackend->set($cid, $result, $result->getCacheMaxAge(), $result->getCacheTags());
310		}
311
312		return $result;
313		});
314		}
315
316		/**
317		* @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
318		* @param \GraphQL\Server\ServerConfig $config
319		* @param \GraphQL\Server\OperationParams $params
320		* @param \GraphQL\Language\AST\DocumentNode $document
321		*
322		* @return \GraphQL\Executor\Promise\Promise
323		*/
324		protected function executeUncachableOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, DocumentNode $document) {
325		return $this->doExecuteOperation($adapter, $config, $params, $document);
326		}
327
328		/**
329		* @param \GraphQL\Executor\Promise\PromiseAdapter $adapter
330		* @param \GraphQL\Server\ServerConfig $config
331		* @param \GraphQL\Server\OperationParams $params
332		* @param \GraphQL\Language\AST\DocumentNode $document
333		*
334		* @return \GraphQL\Executor\Promise\Promise
335		*/
336		protected function doExecuteOperation(PromiseAdapter $adapter, ServerConfig $config, OperationParams $params, DocumentNode $document) {
337		$operation = $params->operation;
338		$variables = $params->variables;
339		$context = $this->resolveContextValue($config, $params, $document, $operation);
340		$root = $this->resolveRootValue($config, $params, $document, $operation);
341		$resolver = $config->getFieldResolver();
342		$schema = $config->getSchema();
343
344		$promise = Executor::promiseToExecute(
345		$adapter,
346		$schema,
347		$document,
348		$root,
349		$context,
350		$variables,
351		$operation,
352		$resolver
353		);
354
355		return $promise->then(function (ExecutionResult $result) use ($context) {
356		// Add the collected cache metadata to the result.
357		$metadata = (new CacheableMetadata())->addCacheableDependency($context);
358		$output = new QueryResult($result->data, $result->errors, $result->extensions, $metadata);
359
360		return $output;
361		});
362		}
363
364		/**
365		* @param \GraphQL\Server\OperationParams $params
366		*
367		* @return array
368		*/
369		protected function validateOperationParams(OperationParams $params) {
370		$errors = (new Helper())->validateOperationParams($params);
371		return array_map(function (RequestError $error) {
372		return Error::createLocatedError($error, NULL, NULL);
373		}, $errors);
374		}
375
376		/**
377		* @param \GraphQL\Server\ServerConfig $config
378		* @param \GraphQL\Server\OperationParams $params
379		* @param \GraphQL\Language\AST\DocumentNode $document
380		*
381		* @return \GraphQL\Error\Error[]
382		*/
383		protected function validateOperation(ServerConfig $config, OperationParams $params, DocumentNode $document) {
384		$operation = $params->operation;
385		// Skip validation if there are no validation rules to be applied.
386		if (!$rules = $this->resolveValidationRules($config, $params, $document, $operation)) {
387		return [];
388		}
389
390		$schema = $config->getSchema();
391		$info = new TypeInfo($schema);
392		$validation = new ValidationContext($schema, $document, $info);
393		$visitors = array_values(array_map(function (AbstractValidationRule $rule) use ($validation) {
394		return $rule($validation);
395		}, $rules));
396
397		// Run the query visitor with the prepared validation rules and the cache
398		// metadata collector and query complexity calculator.
399		Visitor::visit($document, Visitor::visitWithTypeInfo($info, Visitor::visitInParallel($visitors)));
400
401		// Return any possible errors collected during validation.
402		return $validation->getErrors();
403		}
404
405		/**
406		* @param \GraphQL\Server\ServerConfig $config
407		* @param \GraphQL\Server\OperationParams $params
408		* @param \GraphQL\Language\AST\DocumentNode $document
409		* @param $operation
410		*
411		* @return mixed
412		*/
413	View Code Duplication	protected function resolveRootValue(ServerConfig $config, OperationParams $params, DocumentNode $document, $operation) {
		0 ignored issues – show Duplication introduced 2018-02-19 09:47 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
414		$root = $config->getRootValue();
415		if (is_callable($root)) {
416		$root = $root($params, $document, $operation);
417		}
418
419		return $root;
420		}
421
422		/**
423		* @param \GraphQL\Server\ServerConfig $config
424		* @param \GraphQL\Server\OperationParams $params
425		* @param \GraphQL\Language\AST\DocumentNode $document
426		* @param $operation
427		*
428		* @return mixed
429		*/
430	View Code Duplication	protected function resolveContextValue(ServerConfig $config, OperationParams $params, DocumentNode $document, $operation) {
		0 ignored issues – show Duplication introduced 2018-02-19 09:47 UTC by Report Bug Copy Issue Report This method seems to be duplicated in your project. Duplicated code is one of the most pungent code smells. If you need to duplicate the same code in three or more different places, we strongly encourage you to look into extracting the code into a single class or operation. You can also find more detailed suggestions in the “Code” section of your repository. Loading history...
431		$context = $config->getContext();
432		if (is_callable($context)) {
433		$context = $context($params, $document, $operation);
434		}
435
436		return $context;
437		}
438
439		/**
440		* @param \GraphQL\Server\ServerConfig $config
441		* @param \GraphQL\Server\OperationParams $params
442		* @param \GraphQL\Language\AST\DocumentNode $document
443		* @param $operation
444		*
445		* @return array
446		*/
447		protected function resolveValidationRules(ServerConfig $config, OperationParams $params, DocumentNode $document, $operation) {
448		// Allow customizing validation rules per operation:
449		$rules = $config->getValidationRules();
450		if (is_callable($rules)) {
451		$rules = $rules($params, $document, $operation);
452		if (!is_array($rules)) {
453		throw new \LogicException(sprintf("Expecting validation rules to be array or callable returning array, but got: %s", Utils::printSafe($rules)));
454		}
455		}
456
457		return $rules;
458		}
459
460		/**
461		* @param \GraphQL\Server\ServerConfig $config
462		* @param \GraphQL\Server\OperationParams $params
463		*
464		* @return mixed
465		* @throws \GraphQL\Server\RequestError
466		*/
467		protected function loadPersistedQuery(ServerConfig $config, OperationParams $params) {
468		if (!$loader = $config->getPersistentQueryLoader()) {
469		throw new RequestError('Persisted queries are not supported by this server.');
470		}
471
472		$source = $loader($params->queryId, $params);
473		if (!is_string($source) && !$source instanceof DocumentNode) {
474		throw new \LogicException(sprintf('The persisted query loader must return query string or instance of %s but got: %s.', DocumentNode::class, Utils::printSafe($source)));
475		}
476
477		return $source;
478		}
479
480		/**
481		* @param \GraphQL\Language\AST\DocumentNode $document
482		*
483		* @return array
484		*/
485		protected function serializeDocument(DocumentNode $document) {
486		return $this->sanitizeRecursive(AST::toArray($document));
487		}
488
489		/**
490		* @param array $item
491		*
492		* @return array
493		*/
494		protected function sanitizeRecursive(array $item) {
495		unset($item['loc']);
496
497		foreach ($item as &$value) {
498		if (is_array($value)) {
499		$value = $this->sanitizeRecursive($value);
500		}
501		}
502
503		return $item;
504		}
505
506		/**
507		* @param \GraphQL\Language\AST\DocumentNode $document
508		* @param \Drupal\Core\Cache\CacheableMetadata $metadata
509		*
510		* @return string
511		*/
512		protected function cacheIdentifier(DocumentNode $document, CacheableMetadata $metadata) {
513		$contexts = $metadata->getCacheContexts();
514		$keys = $this->contextsManager->convertTokensToKeys($contexts)->getKeys();
515		// Prepend the hash of the serialized document to the cache contexts.
516		$hash = hash('sha256', json_encode($this->serializeDocument($document)));
517		return implode(':', array_values(array_merge([$hash], $keys)));
518		}
519		}
520

drupal-graphql / graphql

Pull Request — 8.x-3.x (#525)

QueryProcessor::executeOperation() C

Complexity

Size

Duplication

Importance

How to fix Complexity

Long Method

Duplication Side-by-Side

Filter issues like