forked from OSS/graphql
Pass variables when generating the IR
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@ -3,7 +3,6 @@
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obtain one at https://mozilla.org/MPL/2.0/. -}
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{-# LANGUAGE ExplicitForAll #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE RecordWildCards #-}
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module Language.GraphQL.Executor
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@ -15,12 +14,16 @@ module Language.GraphQL.Executor
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, executeRequest
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) where
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import Control.Monad.Trans.Class (MonadTrans(..))
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import Control.Monad.Trans.Reader (ReaderT(..), ask, runReader)
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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.Foldable (find)
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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.Int (Int32)
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import Data.List.NonEmpty (NonEmpty)
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import qualified Data.List.NonEmpty as NonEmpty
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import Data.Text (Text)
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import qualified Data.Text as Text
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@ -32,6 +35,25 @@ import qualified Language.GraphQL.Type.Internal as Type.Internal
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import Language.GraphQL.Type.Schema (Schema)
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import qualified Language.GraphQL.Type.Schema as Schema
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newtype TransformT m a = TransformT
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{ runTransformT :: ReaderT Type.Subs m a
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}
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instance Functor m => Functor (TransformT m) where
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fmap f = TransformT . fmap f . runTransformT
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instance Applicative m => Applicative (TransformT m) where
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pure = TransformT . pure
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TransformT f <*> TransformT x = TransformT $ f <*> x
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instance Monad m => Monad (TransformT m) where
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TransformT x >>= f = TransformT $ x >>= runTransformT . f
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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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data Segment = Segment String | Index Int
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data Error = Error
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@ -133,44 +155,48 @@ document = foldr filterOperation []
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operationDefinition' : accumulator
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filterOperation _ accumulator = accumulator -- Fragment.
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operationDefinition :: Type.Subs -> Full.OperationDefinition -> Operation
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operationDefinition coercedVariableValues = \case
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Full.OperationDefinition operationType _ _ _ selectionSet' _ ->
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Operation operationType coercedVariableValues
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$ selectionSet selectionSet'
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Full.SelectionSet selectionSet' _ ->
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Operation Full.Query coercedVariableValues (selectionSet selectionSet')
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transform :: Full.OperationDefinition -> Transform Operation
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transform (Full.OperationDefinition operationType _ _ _ selectionSet' _) = do
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coercedVariableValues <- TransformT ask
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transformedSelections <- selectionSet selectionSet'
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pure $ Operation operationType coercedVariableValues transformedSelections
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transform (Full.SelectionSet selectionSet' _) = do
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coercedVariableValues <- TransformT ask
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transformedSelections <- selectionSet selectionSet'
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pure $ Operation Full.Query coercedVariableValues transformedSelections
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selectionSet :: Full.SelectionSet -> SelectionSet
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selectionSet = NonEmpty.toList . fmap selection
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selectionSet :: Full.SelectionSet -> Transform SelectionSet
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selectionSet = traverse selection . NonEmpty.toList
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selection :: Full.Selection -> Selection
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selection (Full.FieldSelection field') = FieldSelection $ field field'
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selection :: Full.Selection -> Transform Selection
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selection (Full.FieldSelection field') = FieldSelection <$> field field'
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selection (Full.FragmentSpreadSelection fragmentSpread') =
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FragmentSpreadSelection $ fragmentSpread fragmentSpread'
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FragmentSpreadSelection <$> fragmentSpread fragmentSpread'
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selection (Full.InlineFragmentSelection inlineFragment') =
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InlineFragmentSelection $ inlineFragment inlineFragment'
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InlineFragmentSelection <$> inlineFragment inlineFragment'
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inlineFragment :: Full.InlineFragment -> InlineFragment
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inlineFragment (Full.InlineFragment typeCondition directives selectionSet' location) =
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InlineFragment
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inlineFragment :: Full.InlineFragment -> Transform InlineFragment
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inlineFragment (Full.InlineFragment typeCondition directives selectionSet' location) = do
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transformedSelections <- selectionSet selectionSet'
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pure $ InlineFragment
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typeCondition
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(directive <$> directives)
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(selectionSet selectionSet')
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transformedSelections
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location
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fragmentSpread :: Full.FragmentSpread -> FragmentSpread
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fragmentSpread :: Full.FragmentSpread -> Transform FragmentSpread
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fragmentSpread (Full.FragmentSpread name' directives location) =
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FragmentSpread name' (directive <$> directives) location
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pure $ FragmentSpread name' (directive <$> directives) location
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field :: Full.Field -> Field
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field (Full.Field alias' name' arguments' directives' selectionSet' location') =
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Field
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field :: Full.Field -> Transform Field
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field (Full.Field alias' name' arguments' directives' selectionSet' location') = do
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transformedSelections <- traverse selection selectionSet'
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pure $ Field
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alias'
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name'
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(argument <$> arguments')
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(directive <$> directives')
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(selection <$> selectionSet')
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transformedSelections
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location'
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argument :: Full.Argument -> Argument
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@ -220,14 +246,17 @@ executeRequest schema sourceDocument operationName variableValues initialValue =
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subscribe topSelections schema coercedVariables initialValue
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where
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schemaTypes = Schema.types schema
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transformedDocument = document sourceDocument
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operationDefinitions = document sourceDocument
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operationAndVariables = do
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operationDefinition' <- getOperation transformedDocument operationName
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operationDefinition <- getOperation operationDefinitions operationName
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coercedVariableValues <- coerceVariableValues
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schemaTypes
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operationDefinition'
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operationDefinition
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variableValues
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pure $ operationDefinition coercedVariableValues operationDefinition'
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pure
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$ flip runReader coercedVariableValues
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$ runTransformT
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$ transform operationDefinition
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getOperation :: [Full.OperationDefinition] -> Maybe String -> Either QueryError Full.OperationDefinition
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getOperation [operation] Nothing = Right operation
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@ -278,7 +307,7 @@ executeSelectionSet selections objectType _objectValue variableValues =
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let _groupedFieldSet = collectFields objectType selections variableValues
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in mempty
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collectFields :: Out.ObjectType IO -> SelectionSet -> Type.Subs -> OrderedMap [Selection]
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collectFields :: Out.ObjectType IO -> SelectionSet -> Type.Subs -> OrderedMap (NonEmpty Selection)
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collectFields = mempty
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coerceVariableValues :: Coerce.VariableValue a
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