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<?php |
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namespace Overblog\GraphQLBundle\Resolver; |
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use GraphQL\Executor\Promise\Adapter\SyncPromise; |
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use GraphQL\Executor\Promise\Promise; |
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use GraphQL\Executor\Promise\PromiseAdapter; |
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use GraphQL\Type\Definition\ListOfType; |
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use GraphQL\Type\Definition\ResolveInfo; |
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use Overblog\GraphQLBundle\Error\UserError; |
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use Overblog\GraphQLBundle\Error\UserWarning; |
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use Overblog\GraphQLBundle\Relay\Connection\Output\Connection; |
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use Overblog\GraphQLBundle\Relay\Connection\Output\Edge; |
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class AccessResolver |
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{ |
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/** @var PromiseAdapter */ |
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private $promiseAdapter; |
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public function __construct(PromiseAdapter $promiseAdapter) |
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{ |
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$this->promiseAdapter = $promiseAdapter; |
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} |
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public function resolve(callable $accessChecker, callable $resolveCallback, array $resolveArgs = [], $useStrictAccess = false) |
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{ |
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if ($useStrictAccess || self::isMutationRootField($resolveArgs[3])) { |
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return $this->checkAccessForStrictMode($accessChecker, $resolveCallback, $resolveArgs); |
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} |
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$resultOrPromise = \call_user_func_array($resolveCallback, $resolveArgs); |
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if ($this->isThenable($resultOrPromise)) { |
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return $this->createPromise( |
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$resultOrPromise, |
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function ($result) use ($accessChecker, $resolveArgs) { |
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return $this->processFilter($result, $accessChecker, $resolveArgs); |
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} |
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); |
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} |
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return $this->processFilter($resultOrPromise, $accessChecker, $resolveArgs); |
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} |
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private static function isMutationRootField(ResolveInfo $info) |
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{ |
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return 'mutation' === $info->operation->operation && $info->parentType === $info->schema->getMutationType(); |
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} |
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private function checkAccessForStrictMode(callable $accessChecker, callable $resolveCallback, array $resolveArgs = []) |
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{ |
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$promiseOrHasAccess = $this->hasAccess($accessChecker, $resolveArgs); |
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$callback = function ($hasAccess) use ($resolveArgs, $resolveCallback) { |
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if (true === $hasAccess) { |
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return \call_user_func_array($resolveCallback, $resolveArgs); |
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} |
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$exceptionClassName = self::isMutationRootField($resolveArgs[3]) ? UserError::class : UserWarning::class; |
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throw new $exceptionClassName('Access denied to this field.'); |
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}; |
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if ($this->isThenable($promiseOrHasAccess)) { |
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return $this->createPromise($promiseOrHasAccess, $callback); |
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} else { |
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return $callback($promiseOrHasAccess); |
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} |
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} |
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private function processFilter($result, $accessChecker, $resolveArgs) |
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{ |
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/** @var ResolveInfo $resolveInfo */ |
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$resolveInfo = $resolveArgs[3]; |
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if (self::isIterable($result) && $resolveInfo->returnType instanceof ListOfType) { |
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foreach ($result as $i => $object) { |
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$result[$i] = $this->hasAccess($accessChecker, $resolveArgs, $object) ? $object : null; |
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} |
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} elseif ($result instanceof Connection) { |
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$result->edges = \array_map( |
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function (Edge $edge) use ($accessChecker, $resolveArgs) { |
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$edge->node = $this->hasAccess($accessChecker, $resolveArgs, $edge->node) ? $edge->node : null; |
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return $edge; |
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}, |
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$result->edges |
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); |
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} elseif (!$this->hasAccess($accessChecker, $resolveArgs, $result)) { |
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throw new UserWarning('Access denied to this field.'); |
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} |
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return $result; |
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} |
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private function hasAccess(callable $accessChecker, array $resolveArgs = [], $object = null) |
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{ |
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$resolveArgs[] = $object; |
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$accessOrPromise = \call_user_func_array($accessChecker, $resolveArgs); |
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return $accessOrPromise; |
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} |
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private function isThenable($object) |
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{ |
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$object = $this->extractAdoptedPromise($object); |
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return $this->promiseAdapter->isThenable($object) || $object instanceof SyncPromise; |
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} |
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private function extractAdoptedPromise($object) |
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{ |
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if ($object instanceof Promise) { |
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$object = $object->adoptedPromise; |
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} |
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return $object; |
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} |
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private function createPromise($promise, callable $onFulfilled = null) |
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{ |
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return $this->promiseAdapter->then( |
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new Promise($this->extractAdoptedPromise($promise), $this->promiseAdapter), |
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$onFulfilled |
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); |
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} |
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/** |
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* @param mixed $data |
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* |
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* @return bool |
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*/ |
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private static function isIterable($data) |
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{ |
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if (\function_exists('is_iterable')) { |
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return \is_iterable($data); |
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} else { |
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return \is_array($data) || (\is_object($data) && ($data instanceof \Traversable)); |
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} |
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} |
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} |
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overblog /
GraphQLBundle
