Handle errors
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@ -2,9 +2,10 @@
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v. 2.0. If a copy of the MPL was not distributed with this file, You can
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obtain one at https://mozilla.org/MPL/2.0/. -}
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{-# LANGUAGE ExplicitForAll #-}
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{-# LANGUAGE ExistentialQuantification #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE NamedFieldPuns #-}
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{-# LANGUAGE OverloadedStrings #-}
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{-# LANGUAGE RecordWildCards #-}
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module Language.GraphQL.Executor
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@ -16,16 +17,21 @@ module Language.GraphQL.Executor
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, executeRequest
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) where
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import Control.Monad.Catch
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( Exception(..)
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, MonadCatch(..)
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, MonadThrow(..)
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, SomeException(..)
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)
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import Control.Monad.Trans.Class (MonadTrans(..))
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import Control.Monad.Trans.Reader (ReaderT(..), local, runReader)
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import Control.Monad.Trans.Reader (ReaderT(..), ask, local, runReaderT)
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import Control.Monad.Trans.Writer (WriterT(..), runWriterT, tell)
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import qualified Control.Monad.Trans.Reader as Reader
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import Control.Monad (foldM)
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import qualified Language.GraphQL.AST.Document as Full
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import qualified Data.Aeson as Aeson
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import Data.Bifunctor (first)
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import Data.Foldable (find)
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import Data.Functor ((<&>))
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import Data.Functor.Identity (Identity)
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import Data.HashMap.Strict (HashMap)
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import qualified Data.HashMap.Strict as HashMap
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import Data.HashSet (HashSet)
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@ -38,6 +44,7 @@ import Data.Sequence (Seq, (><))
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import qualified Data.Sequence as Seq
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import Data.Text (Text)
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import qualified Data.Text as Text
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import Data.Typeable (cast)
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import qualified Language.GraphQL.Execute.Coerce as Coerce
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import Language.GraphQL.Execute.OrderedMap (OrderedMap)
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import qualified Language.GraphQL.Execute.OrderedMap as OrderedMap
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@ -48,15 +55,15 @@ import qualified Language.GraphQL.Type.Internal as Type.Internal
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import Language.GraphQL.Type.Schema (Schema, Type)
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import qualified Language.GraphQL.Type.Schema as Schema
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data Replacement = Replacement
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data Replacement m = Replacement
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{ variableValues :: Type.Subs
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, fragmentDefinitions :: HashMap Full.Name Full.FragmentDefinition
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, visitedFragments :: HashSet Full.Name
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, types :: HashMap Full.Name (Type IO)
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, types :: HashMap Full.Name (Type m)
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}
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newtype TransformT m a = TransformT
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{ runTransformT :: ReaderT Replacement m a
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{ runTransformT :: ReaderT (Replacement m) m a
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}
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instance Functor m => Functor (TransformT m) where
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@ -72,7 +79,87 @@ instance Monad m => Monad (TransformT m) where
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instance MonadTrans TransformT where
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lift = TransformT . lift
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type Transform = TransformT Identity
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instance MonadThrow m => MonadThrow (TransformT m) where
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throwM = lift . throwM
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instance MonadCatch m => MonadCatch (TransformT m) where
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catch (TransformT stack) handler =
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TransformT $ catch stack $ runTransformT . handler
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newtype ExecutorT m a = ExecutorT
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{ runExecutorT :: ReaderT (HashMap Full.Name (Type m)) (WriterT [Error] m) a
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}
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instance Functor m => Functor (ExecutorT m) where
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fmap f = ExecutorT . fmap f . runExecutorT
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instance Applicative m => Applicative (ExecutorT m) where
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pure = ExecutorT . pure
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ExecutorT f <*> ExecutorT x = ExecutorT $ f <*> x
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instance Monad m => Monad (ExecutorT m) where
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ExecutorT x >>= f = ExecutorT $ x >>= runExecutorT . f
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instance MonadTrans ExecutorT where
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lift = ExecutorT . lift . lift
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instance MonadThrow m => MonadThrow (ExecutorT m) where
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throwM = lift . throwM
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instance MonadCatch m => MonadCatch (ExecutorT m) where
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catch (ExecutorT stack) handler =
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ExecutorT $ catch stack $ runExecutorT . handler
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data GraphQLException = forall e. Exception e => GraphQLException e
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instance Show GraphQLException where
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show (GraphQLException e) = show e
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instance Exception GraphQLException
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graphQLExceptionToException :: Exception e => e -> SomeException
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graphQLExceptionToException = toException . GraphQLException
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graphQLExceptionFromException :: Exception e => SomeException -> Maybe e
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graphQLExceptionFromException e = do
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GraphQLException graphqlException <- fromException e
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cast graphqlException
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data ResolverException = forall e. Exception e => ResolverException e
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instance Show ResolverException where
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show (ResolverException e) = show e
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instance Exception ResolverException where
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toException = graphQLExceptionToException
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fromException = graphQLExceptionFromException
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data FieldError
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= ArgumentTypeError
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| MissingArgumentError
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| EnumCompletionError
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| InterfaceCompletionError
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| UnionCompletionError
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| ValueCompletionError
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| ResultCoercionError
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| NullResultError
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instance Show FieldError where
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show ArgumentTypeError = "Invalid argument type."
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show MissingArgumentError = "Required argument not specified."
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show EnumCompletionError = "Enum value completion failed."
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show InterfaceCompletionError = "Interface value completion failed."
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show UnionCompletionError = "Union value completion failed."
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show ValueCompletionError = "Value completion failed."
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show ResultCoercionError = "Result coercion failed."
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show NullResultError = "Non-Nullable field resolver returned Null."
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newtype FieldException = FieldException FieldError
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deriving Show
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instance Exception FieldException where
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toException = graphQLExceptionToException
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fromException = graphQLExceptionFromException
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data Segment = Segment String | Index Int
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@ -82,8 +169,8 @@ data Error = Error
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, path :: [Segment]
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}
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data Response = Response
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{ data' :: Aeson.Object
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data Response a = Response
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{ data' :: a
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, errors :: [Error]
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}
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@ -93,7 +180,7 @@ data QueryError
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| CoercionError Full.VariableDefinition
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| UnknownInputType Full.VariableDefinition
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asks :: forall a. (Replacement -> a) -> Transform a
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asks :: Monad m => forall a. (Replacement m -> a) -> TransformT m a
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asks = TransformT . Reader.asks
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queryError :: QueryError -> Error
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@ -125,49 +212,32 @@ queryError (UnknownInputType variableDefinition) =
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]
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in Error{ message = queryErrorMessage, locations = [location], path = [] }
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respondWithQueryError :: QueryError -> Response
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respondWithQueryError = Response mempty . pure . queryError
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data Operation m = Operation Full.OperationType (Seq (Selection m))
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-- operationName selectionSet location
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data Operation = Operation
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Full.OperationType
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Type.Subs
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SelectionSet
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data Selection m
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= FieldSelection (Field m)
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| FragmentSelection (Fragment m)
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type SelectionSet = Seq Selection
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data Selection
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= FieldSelection Field
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| FragmentSelection Fragment
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data Argument = Argument Full.Name (Full.Node Input) Full.Location
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data Field = Field
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data Field m = Field
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(Maybe Full.Name)
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Full.Name
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[Argument]
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SelectionSet
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(HashMap Full.Name (Full.Node Input))
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(Seq (Selection m))
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Full.Location
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data Fragment = Fragment
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(Type.Internal.CompositeType IO) SelectionSet Full.Location
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data Fragment m = Fragment
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(Type.Internal.CompositeType m) (Seq (Selection m)) Full.Location
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data Input
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= Variable Full.Name
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= Variable Type.Value
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| Int Int32
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| Float Double
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| String Text
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| Boolean Bool
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| Null
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| Enum Full.Name
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| List [Full.Node Input]
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| Object [ObjectField]
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data ObjectField = ObjectField
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{ name :: Full.Name
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, value :: Full.Node Input
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, location :: Full.Location
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}
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| List [Input]
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| Object (HashMap Full.Name Input)
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document :: Full.Document
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-> ([Full.OperationDefinition], HashMap Full.Name Full.FragmentDefinition)
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@ -181,26 +251,24 @@ document = foldr filterOperation ([], HashMap.empty)
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HashMap.insert fragmentName fragmentDefinition <$> accumulator
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filterOperation _ accumulator = accumulator -- Type system definitions.
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transform :: Full.OperationDefinition -> Transform Operation
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transform :: Monad m => Full.OperationDefinition -> TransformT m (Operation m)
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transform (Full.OperationDefinition operationType _ _ _ selectionSet' _) = do
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coercedVariableValues <- asks variableValues
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transformedSelections <- selectionSet selectionSet'
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pure $ Operation operationType coercedVariableValues transformedSelections
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pure $ Operation operationType transformedSelections
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transform (Full.SelectionSet selectionSet' _) = do
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coercedVariableValues <- asks variableValues
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transformedSelections <- selectionSet selectionSet'
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pure $ Operation Full.Query coercedVariableValues transformedSelections
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pure $ Operation Full.Query transformedSelections
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selectionSet :: Full.SelectionSet -> Transform SelectionSet
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selectionSet :: Monad m => Full.SelectionSet -> TransformT m (Seq (Selection m))
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selectionSet = selectionSetOpt . NonEmpty.toList
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selectionSetOpt :: Full.SelectionSetOpt -> Transform SelectionSet
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selectionSetOpt :: Monad m => Full.SelectionSetOpt -> TransformT m (Seq (Selection m))
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selectionSetOpt = foldM go Seq.empty
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where
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go accumulatedSelections currentSelection =
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selection currentSelection <&> (accumulatedSelections ><)
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selection :: Full.Selection -> Transform SelectionSet
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selection :: Monad m => Full.Selection -> TransformT m (Seq (Selection m))
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selection (Full.FieldSelection field') =
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maybeToSelectionSet FieldSelection $ field field'
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selection (Full.FragmentSpreadSelection fragmentSpread') =
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@ -208,17 +276,19 @@ selection (Full.FragmentSpreadSelection fragmentSpread') =
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selection (Full.InlineFragmentSelection inlineFragment') =
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either id (pure . FragmentSelection) <$> inlineFragment inlineFragment'
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maybeToSelectionSet :: forall a
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. (a -> Selection)
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-> Transform (Maybe a)
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-> Transform SelectionSet
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maybeToSelectionSet :: Monad m
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=> forall a
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. (a -> Selection m)
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-> TransformT m (Maybe a)
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-> TransformT m (Seq (Selection m))
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maybeToSelectionSet selectionType = fmap (maybe Seq.empty $ pure . selectionType)
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directives :: [Full.Directive] -> Transform (Maybe [Type.Directive])
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directives :: Monad m => [Full.Directive] -> TransformT m (Maybe [Type.Directive])
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directives = fmap Type.selection . traverse directive
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inlineFragment :: Full.InlineFragment
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-> Transform (Either SelectionSet Fragment)
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inlineFragment :: Monad m
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=> Full.InlineFragment
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-> TransformT m (Either (Seq (Selection m)) (Fragment m))
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inlineFragment (Full.InlineFragment maybeCondition directives' selectionSet' location)
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| Just typeCondition <- maybeCondition = do
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transformedSelections <- selectionSet selectionSet'
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@ -237,7 +307,7 @@ inlineFragment (Full.InlineFragment maybeCondition directives' selectionSet' loc
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then Left transformedSelections
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else Left Seq.empty
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fragmentSpread :: Full.FragmentSpread -> Transform (Maybe Fragment)
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fragmentSpread :: Monad m => Full.FragmentSpread -> TransformT m (Maybe (Fragment m))
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fragmentSpread (Full.FragmentSpread spreadName directives' location) = do
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transformedDirectives <- directives directives'
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visitedFragment <- asks $ HashSet.member spreadName . visitedFragments
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@ -263,10 +333,11 @@ fragmentSpread (Full.FragmentSpread spreadName directives' location) = do
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fragmentInserter replacement@Replacement{ visitedFragments } = replacement
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{ visitedFragments = HashSet.insert spreadName visitedFragments }
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field :: Full.Field -> Transform (Maybe Field)
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field :: Monad m => Full.Field -> TransformT m (Maybe (Field m))
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field (Full.Field alias' name' arguments' directives' selectionSet' location') = do
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transformedSelections <- selectionSetOpt selectionSet'
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transformedDirectives <- directives directives'
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transformedArguments <- arguments arguments'
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let transformedField = Field
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alias'
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name'
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@ -274,24 +345,25 @@ field (Full.Field alias' name' arguments' directives' selectionSet' location') =
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transformedSelections
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location'
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pure $ transformedDirectives >> pure transformedField
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arguments :: Monad m => [Full.Argument] -> TransformT m (HashMap Full.Name (Full.Node Input))
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arguments = foldM go HashMap.empty
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where
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transformedArguments = argument <$> arguments'
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go accumulator (Full.Argument name' valueNode _) = do
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argumentValue <- node valueNode
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pure $ insertIfGiven name' argumentValue accumulator
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argument :: Full.Argument -> Argument
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argument (Full.Argument name' valueNode location') =
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Argument name' (node valueNode) location'
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directive :: Full.Directive -> Transform Type.Directive
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directive (Full.Directive name' arguments _)
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directive :: Monad m => Full.Directive -> TransformT m Type.Directive
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directive (Full.Directive name' arguments' _)
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= Type.Directive name'
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. Type.Arguments
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<$> foldM go HashMap.empty arguments
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<$> foldM go HashMap.empty arguments'
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where
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go accumulator (Full.Argument argumentName Full.Node{ node = node' } _) = do
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transformedValue <- directiveValue node'
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pure $ HashMap.insert argumentName transformedValue accumulator
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directiveValue :: Full.Value -> Transform Type.Value
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directiveValue :: Monad m => Full.Value -> TransformT m Type.Value
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directiveValue = \case
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(Full.Variable name') -> asks
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$ HashMap.lookupDefault Type.Null name'
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@ -311,47 +383,58 @@ directiveValue = \case
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transformedValue <- directiveNode value
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pure $ HashMap.insert name transformedValue accumulator
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variableValue :: Full.Value -> Input
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variableValue (Full.Variable name') = Variable name'
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variableValue (Full.Int integer) = Int integer
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variableValue (Full.Float double) = Float double
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variableValue (Full.String string) = String string
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variableValue (Full.Boolean boolean) = Boolean boolean
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variableValue Full.Null = Null
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variableValue (Full.Enum enum) = Enum enum
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variableValue (Full.List list) = List $ node <$> list
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variableValue (Full.Object objectFields) = Object $ objectField <$> objectFields
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input :: Monad m => Full.Value -> TransformT m (Maybe Input)
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input (Full.Variable name') =
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asks (HashMap.lookup name' . variableValues) <&> fmap Variable
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input (Full.Int integer) = pure $ Just $ Int integer
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input (Full.Float double) = pure $ Just $ Float double
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input (Full.String string) = pure $ Just $ String string
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input (Full.Boolean boolean) = pure $ Just $ Boolean boolean
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input Full.Null = pure $ Just Null
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input (Full.Enum enum) = pure $ Just $ Enum enum
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input (Full.List list) = Just . List
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<$> traverse (fmap (fromMaybe Null) . input . Full.node) list
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input (Full.Object objectFields) = Just . Object
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<$> foldM objectField HashMap.empty objectFields
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where
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objectField :: Full.ObjectField Full.Value -> ObjectField
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objectField Full.ObjectField{..} = ObjectField
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{ name = name
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, value = node value
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, location = location
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}
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objectField accumulator Full.ObjectField{..} = do
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objectFieldValue <- fmap Full.node <$> node value
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pure $ insertIfGiven name objectFieldValue accumulator
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node :: Full.Node Full.Value -> Full.Node Input
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node Full.Node{node = node', ..} = Full.Node (variableValue node') location
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insertIfGiven :: forall a
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. Full.Name
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-> Maybe a
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-> HashMap Full.Name a
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-> HashMap Full.Name a
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insertIfGiven name (Just v) = HashMap.insert name v
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insertIfGiven _ _ = id
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executeRequest :: Schema IO
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node :: Monad m => Full.Node Full.Value -> TransformT m (Maybe (Full.Node Input))
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node Full.Node{node = node', ..} =
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traverse Full.Node <$> input node' <*> pure location
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executeRequest :: (MonadCatch m, Coerce.Serialize a, Coerce.VariableValue b)
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=> Schema m
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-> Full.Document
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-> Maybe String
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-> Aeson.Object
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-> Aeson.Object
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-> IO Response
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executeRequest schema sourceDocument operationName variableValues initialValue =
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-> HashMap Full.Name b
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-> m (Response a)
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executeRequest schema sourceDocument operationName variableValues = do
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operationAndVariables <- sequence buildOperation
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case operationAndVariables of
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Left queryError' -> pure $ respondWithQueryError queryError'
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Left queryError' -> pure
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$ Response Coerce.null $ pure $ queryError queryError'
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Right operation
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| Operation Full.Query coercedVariables topSelections <- operation ->
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executeQuery topSelections schema coercedVariables initialValue
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| Operation Full.Mutation corecedVariables topSelections <- operation ->
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executeMutation topSelections schema corecedVariables initialValue
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| Operation Full.Subscription coercedVariables topSelections <- operation ->
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subscribe topSelections schema coercedVariables initialValue
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| Operation Full.Query topSelections <- operation ->
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executeQuery topSelections schema
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| Operation Full.Mutation topSelections <- operation ->
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executeMutation topSelections schema
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| Operation Full.Subscription topSelections <- operation ->
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subscribe topSelections schema
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where
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schemaTypes = Schema.types schema
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(operationDefinitions, fragmentDefinitions') = document sourceDocument
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operationAndVariables = do
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buildOperation = do
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operationDefinition <- getOperation operationDefinitions operationName
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coercedVariableValues <- coerceVariableValues
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schemaTypes
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@ -363,8 +446,7 @@ executeRequest schema sourceDocument operationName variableValues initialValue =
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, visitedFragments = mempty
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, types = schemaTypes
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}
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pure
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$ flip runReader replacement
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pure $ flip runReaderT replacement
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$ runTransformT
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$ transform operationDefinition
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@ -379,77 +461,246 @@ getOperation operations (Just givenOperationName)
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findOperationByName _ = False
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getOperation _ _ = Left OperationNameRequired
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executeQuery :: SelectionSet
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-> Schema IO
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-> Type.Subs
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-> Aeson.Object
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-> IO Response
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executeQuery topSelections schema coercedVariables initialValue =
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executeQuery :: (MonadCatch m, Coerce.Serialize a)
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=> Seq (Selection m)
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-> Schema m
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-> m (Response a)
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executeQuery topSelections schema = do
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let queryType = Schema.query schema
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_data = executeSelectionSet topSelections queryType initialValue coercedVariables
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in pure $ Response mempty mempty
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(data', errors) <- runWriterT
|
||||
$ flip runReaderT (Schema.types schema)
|
||||
$ runExecutorT
|
||||
$ executeSelectionSet topSelections queryType Type.Null []
|
||||
pure $ Response data' errors
|
||||
|
||||
executeMutation :: forall m
|
||||
. SelectionSet
|
||||
executeMutation :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Seq (Selection m)
|
||||
-> Schema m
|
||||
-> Type.Subs
|
||||
-> Aeson.Object
|
||||
-> IO Response
|
||||
executeMutation _operation _schema _coercedVariableValues _initialValue =
|
||||
pure $ Response mempty mempty
|
||||
-> m (Response a)
|
||||
executeMutation topSelections schema
|
||||
| Just mutationType <- Schema.mutation schema = do
|
||||
(data', errors) <- runWriterT
|
||||
$ flip runReaderT (Schema.types schema)
|
||||
$ runExecutorT
|
||||
$ executeSelectionSet topSelections mutationType Type.Null []
|
||||
pure $ Response data' errors
|
||||
| otherwise = pure $ Response Coerce.null
|
||||
[Error "Schema doesn't define a mutation type." [] []]
|
||||
|
||||
subscribe :: forall m
|
||||
. SelectionSet
|
||||
-- TODO: Subscribe.
|
||||
subscribe :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Seq (Selection m)
|
||||
-> Schema m
|
||||
-> Type.Subs
|
||||
-> Aeson.Object
|
||||
-> IO Response
|
||||
subscribe _operation _schema _coercedVariableValues _initialValue =
|
||||
pure $ Response mempty mempty
|
||||
-> m (Response a)
|
||||
subscribe _operation _schema =
|
||||
pure $ Response Coerce.null mempty
|
||||
|
||||
executeSelectionSet
|
||||
:: SelectionSet
|
||||
-> Out.ObjectType IO
|
||||
-> Aeson.Object
|
||||
-> Type.Subs
|
||||
-> Aeson.Object
|
||||
executeSelectionSet selections objectType objectValue variableValues =
|
||||
executeSelectionSet :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Seq (Selection m)
|
||||
-> Out.ObjectType m
|
||||
-> Type.Value
|
||||
-> [Segment]
|
||||
-> ExecutorT m a
|
||||
executeSelectionSet selections objectType objectValue errorPath = do
|
||||
let groupedFieldSet = collectFields objectType selections
|
||||
in OrderedMap.foldlWithKey' go mempty groupedFieldSet
|
||||
resolvedValues <- OrderedMap.traverseMaybe go groupedFieldSet
|
||||
coerceResult (Out.NonNullObjectType objectType) $ Coerce.Object resolvedValues
|
||||
where
|
||||
Out.ObjectType _ _ _ resolvers = objectType
|
||||
executeField' fields resolver =
|
||||
executeField objectType objectValue fields resolver variableValues
|
||||
go resultMap responseKey fields@(Field _ fieldName _ _ _ :| _) =
|
||||
case HashMap.lookup fieldName resolvers of
|
||||
Just resolver ->
|
||||
let responseValue = executeField' fields resolver
|
||||
in HashMap.insert responseKey responseValue resultMap
|
||||
Nothing -> resultMap
|
||||
executeField objectValue fields resolver errorPath
|
||||
Out.ObjectType _ _ _ resolvers = objectType
|
||||
go fields@(Field _ fieldName _ _ _ :| _) =
|
||||
traverse (executeField' fields) $ HashMap.lookup fieldName resolvers
|
||||
|
||||
executeField :: Out.ObjectType IO
|
||||
-> Aeson.Object
|
||||
-> NonEmpty Field
|
||||
-> Out.Resolver IO
|
||||
-> Type.Subs
|
||||
-> Aeson.Value
|
||||
executeField _objectType _objectValue fields fieldType _variableValues =
|
||||
let _field'@(Field _ _fieldName inputArguments _ _) :| _ = fields
|
||||
Out.Field _ _ argumentTypes = resolverField fieldType
|
||||
_argumentValues = coerceArgumentValues argumentTypes inputArguments
|
||||
in Aeson.Null
|
||||
fieldsSegment :: forall m. NonEmpty (Field m) -> Segment
|
||||
fieldsSegment (Field alias fieldName _ _ _ :| _) =
|
||||
Segment (Text.unpack $ fromMaybe fieldName alias)
|
||||
|
||||
executeField :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Type.Value
|
||||
-> NonEmpty (Field m)
|
||||
-> Out.Resolver m
|
||||
-> [Segment]
|
||||
-> ExecutorT m a
|
||||
executeField objectValue fields resolver errorPath =
|
||||
let Field _ fieldName inputArguments _ fieldLocation :| _ = fields
|
||||
in catch (go fieldName inputArguments) $ exceptionHandler fieldLocation
|
||||
where
|
||||
resolverField (Out.ValueResolver resolverField' _) = resolverField'
|
||||
resolverField (Out.EventStreamResolver resolverField' _ _) = resolverField'
|
||||
exceptionHandler :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Full.Location
|
||||
-> GraphQLException
|
||||
-> ExecutorT m a
|
||||
exceptionHandler fieldLocation e =
|
||||
let newError = Error (displayException e) [fieldLocation] errorPath
|
||||
in ExecutorT (lift $ tell [newError]) >> pure Coerce.null
|
||||
go fieldName inputArguments = do
|
||||
let (Out.Field _ fieldType argumentTypes, resolveFunction) =
|
||||
resolverField resolver
|
||||
argumentValues <- coerceArgumentValues argumentTypes inputArguments
|
||||
resolvedValue <-
|
||||
resolveFieldValue resolveFunction objectValue fieldName argumentValues
|
||||
completeValue fieldType fields errorPath resolvedValue
|
||||
resolverField (Out.ValueResolver resolverField' resolveFunction) =
|
||||
(resolverField', resolveFunction)
|
||||
resolverField (Out.EventStreamResolver resolverField' resolveFunction _) =
|
||||
(resolverField', resolveFunction)
|
||||
|
||||
coerceArgumentValues :: HashMap Full.Name In.Argument
|
||||
-> [Argument]
|
||||
-> Either [Full.Location] Type.Subs
|
||||
coerceArgumentValues _argumentDefinitions _argumentNodes = pure mempty
|
||||
resolveFieldValue :: MonadCatch m
|
||||
=> Out.Resolve m
|
||||
-> Type.Value
|
||||
-> Full.Name
|
||||
-> Type.Subs
|
||||
-> ExecutorT m Type.Value
|
||||
resolveFieldValue resolver objectValue _fieldName argumentValues =
|
||||
lift $ runReaderT resolver context
|
||||
where
|
||||
context = Type.Context
|
||||
{ Type.arguments = Type.Arguments argumentValues
|
||||
, Type.values = objectValue
|
||||
}
|
||||
|
||||
collectFields :: Out.ObjectType IO
|
||||
-> SelectionSet
|
||||
-> OrderedMap (NonEmpty Field)
|
||||
resolveAbstractType :: Monad m
|
||||
=> Type.Internal.AbstractType m
|
||||
-> Type.Subs
|
||||
-> ExecutorT m (Maybe (Out.ObjectType m))
|
||||
resolveAbstractType abstractType values'
|
||||
| Just (Type.String typeName) <- HashMap.lookup "__typename" values' = do
|
||||
types' <- ExecutorT ask
|
||||
case HashMap.lookup typeName types' of
|
||||
Just (Type.Internal.ObjectType objectType) ->
|
||||
if Type.Internal.instanceOf objectType abstractType
|
||||
then pure $ Just objectType
|
||||
else pure Nothing
|
||||
_ -> pure Nothing
|
||||
| otherwise = pure Nothing
|
||||
|
||||
completeValue :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Out.Type m
|
||||
-> NonEmpty (Field m)
|
||||
-> [Segment]
|
||||
-> Type.Value
|
||||
-> ExecutorT m a
|
||||
completeValue outputType _ _ Type.Null
|
||||
| Out.isNonNullType outputType = throwFieldError NullResultError
|
||||
| otherwise = pure Coerce.null
|
||||
completeValue outputType@(Out.ListBaseType listType) fields errorPath (Type.List list)
|
||||
= foldM go (0, []) list >>= coerceResult outputType . Coerce.List . snd
|
||||
where
|
||||
go (index, accumulator) listItem = do
|
||||
let updatedPath = Index index : errorPath
|
||||
completedValue <- completeValue listType fields updatedPath listItem
|
||||
pure (index + 1, completedValue : accumulator)
|
||||
completeValue outputType@(Out.ScalarBaseType _) _ _ (Type.Int int) =
|
||||
coerceResult outputType $ Coerce.Int int
|
||||
completeValue outputType@(Out.ScalarBaseType _) _ _ (Type.Boolean boolean) =
|
||||
coerceResult outputType $ Coerce.Boolean boolean
|
||||
completeValue outputType@(Out.ScalarBaseType _) _ _ (Type.Float float) =
|
||||
coerceResult outputType $ Coerce.Float float
|
||||
completeValue outputType@(Out.ScalarBaseType _) _ _ (Type.String string) =
|
||||
coerceResult outputType $ Coerce.String string
|
||||
completeValue outputType@(Out.EnumBaseType enumType) _ _ (Type.Enum enum) =
|
||||
let Type.EnumType _ _ enumMembers = enumType
|
||||
in if HashMap.member enum enumMembers
|
||||
then coerceResult outputType $ Coerce.Enum enum
|
||||
else throwFieldError EnumCompletionError
|
||||
completeValue (Out.ObjectBaseType objectType) fields errorPath result
|
||||
= executeSelectionSet (mergeSelectionSets fields) objectType result
|
||||
$ fieldsSegment fields : errorPath
|
||||
completeValue (Out.InterfaceBaseType interfaceType) fields errorPath result
|
||||
| Type.Object objectMap <- result = do
|
||||
let abstractType = Type.Internal.AbstractInterfaceType interfaceType
|
||||
concreteType <- resolveAbstractType abstractType objectMap
|
||||
case concreteType of
|
||||
Just objectType
|
||||
-> executeSelectionSet (mergeSelectionSets fields) objectType result
|
||||
$ fieldsSegment fields : errorPath
|
||||
Nothing -> throwFieldError InterfaceCompletionError
|
||||
completeValue (Out.UnionBaseType unionType) fields errorPath result
|
||||
| Type.Object objectMap <- result = do
|
||||
let abstractType = Type.Internal.AbstractUnionType unionType
|
||||
concreteType <- resolveAbstractType abstractType objectMap
|
||||
case concreteType of
|
||||
Just objectType
|
||||
-> executeSelectionSet (mergeSelectionSets fields) objectType result
|
||||
$ fieldsSegment fields : errorPath
|
||||
Nothing -> throwFieldError UnionCompletionError
|
||||
completeValue _ _ _ _ = throwFieldError ValueCompletionError
|
||||
|
||||
coerceResult :: (MonadCatch m, Coerce.Serialize a)
|
||||
=> Out.Type m
|
||||
-> Coerce.Output a
|
||||
-> ExecutorT m a
|
||||
coerceResult outputType result
|
||||
| Just serialized <- Coerce.serialize outputType result = pure serialized
|
||||
| otherwise = throwFieldError ResultCoercionError
|
||||
|
||||
mergeSelectionSets :: MonadCatch m
|
||||
=> NonEmpty (Field m)
|
||||
-> Seq (Selection m)
|
||||
mergeSelectionSets = foldr forEach mempty
|
||||
where
|
||||
forEach (Field _ _ _ fieldSelectionSet _) selectionSet' =
|
||||
selectionSet' <> fieldSelectionSet
|
||||
|
||||
throwFieldError :: MonadCatch m => FieldError -> m a
|
||||
throwFieldError = throwM . FieldException
|
||||
|
||||
coerceArgumentValues :: MonadCatch m
|
||||
=> HashMap Full.Name In.Argument
|
||||
-> HashMap Full.Name (Full.Node Input)
|
||||
-> ExecutorT m Type.Subs
|
||||
coerceArgumentValues argumentDefinitions argumentValues =
|
||||
HashMap.foldrWithKey c pure argumentDefinitions mempty
|
||||
where
|
||||
c argumentName argumentType pure' resultMap =
|
||||
forEach argumentName argumentType resultMap >>= pure'
|
||||
forEach :: MonadCatch m
|
||||
=> Full.Name
|
||||
-> In.Argument
|
||||
-> Type.Subs
|
||||
-> m Type.Subs
|
||||
forEach argumentName (In.Argument _ variableType defaultValue) resultMap = do
|
||||
let matchedMap
|
||||
= matchFieldValues' argumentName variableType defaultValue
|
||||
$ Just resultMap
|
||||
in case matchedMap of
|
||||
Just matchedValues -> pure matchedValues
|
||||
Nothing
|
||||
| Just _ <- HashMap.lookup argumentName argumentValues ->
|
||||
throwFieldError ArgumentTypeError
|
||||
| otherwise -> throwFieldError MissingArgumentError
|
||||
matchFieldValues' = Coerce.matchFieldValues coerceArgumentValue
|
||||
$ Full.node <$> argumentValues
|
||||
coerceArgumentValue inputType (Int integer) =
|
||||
Coerce.coerceInputLiteral inputType (Type.Int integer)
|
||||
coerceArgumentValue inputType (Boolean boolean) =
|
||||
Coerce.coerceInputLiteral inputType (Type.Boolean boolean)
|
||||
coerceArgumentValue inputType (String string) =
|
||||
Coerce.coerceInputLiteral inputType (Type.String string)
|
||||
coerceArgumentValue inputType (Float float) =
|
||||
Coerce.coerceInputLiteral inputType (Type.Float float)
|
||||
coerceArgumentValue inputType (Enum enum) =
|
||||
Coerce.coerceInputLiteral inputType (Type.Enum enum)
|
||||
coerceArgumentValue inputType Null
|
||||
| In.isNonNullType inputType = Nothing
|
||||
| otherwise = Coerce.coerceInputLiteral inputType Type.Null
|
||||
coerceArgumentValue (In.ListBaseType inputType) (List list) =
|
||||
let coerceItem = coerceArgumentValue inputType
|
||||
in Type.List <$> traverse coerceItem list
|
||||
coerceArgumentValue (In.InputObjectBaseType inputType) (Object object)
|
||||
| In.InputObjectType _ _ inputFields <- inputType =
|
||||
let go = forEachField object
|
||||
resultMap = HashMap.foldrWithKey go (pure mempty) inputFields
|
||||
in Type.Object <$> resultMap
|
||||
coerceArgumentValue _ (Variable variable) = pure variable
|
||||
coerceArgumentValue _ _ = Nothing
|
||||
forEachField object variableName (In.InputField _ variableType defaultValue) =
|
||||
Coerce.matchFieldValues coerceArgumentValue object variableName variableType defaultValue
|
||||
|
||||
collectFields :: Monad m
|
||||
=> Out.ObjectType m
|
||||
-> Seq (Selection m)
|
||||
-> OrderedMap (NonEmpty (Field m))
|
||||
collectFields objectType = foldl forEach OrderedMap.empty
|
||||
where
|
||||
forEach groupedFields (FieldSelection fieldSelection) =
|
||||
@ -464,11 +715,10 @@ collectFields objectType = foldl forEach OrderedMap.empty
|
||||
in groupedFields <> fragmentGroupedFieldSet
|
||||
| otherwise = groupedFields
|
||||
|
||||
coerceVariableValues :: Coerce.VariableValue a
|
||||
=> forall m
|
||||
. HashMap Full.Name (Schema.Type m)
|
||||
coerceVariableValues :: (Monad m, Coerce.VariableValue b)
|
||||
=> HashMap Full.Name (Schema.Type m)
|
||||
-> Full.OperationDefinition
|
||||
-> HashMap Full.Name a
|
||||
-> HashMap Full.Name b
|
||||
-> Either QueryError Type.Subs
|
||||
coerceVariableValues types operationDefinition' variableValues
|
||||
| Full.OperationDefinition _ _ variableDefinitions _ _ _ <-
|
||||
|
||||
Loading…
Reference in New Issue
Block a user