Skip recursive fragments and marked fields

This commit is contained in:
Eugen Wissner 2021-08-25 10:16:23 +02:00
parent fef7c1ed98
commit db721a3f53

View File

@ -17,7 +17,8 @@ module Language.GraphQL.Executor
) where
import Control.Monad.Trans.Class (MonadTrans(..))
import Control.Monad.Trans.Reader (ReaderT(..), asks, runReader)
import Control.Monad.Trans.Reader (ReaderT(..), local, runReader)
import qualified Control.Monad.Trans.Reader as Reader
import Control.Monad (foldM)
import qualified Language.GraphQL.AST.Document as Full
import qualified Data.Aeson as Aeson
@ -26,6 +27,8 @@ import Data.Foldable (find)
import Data.Functor.Identity (Identity)
import Data.HashMap.Strict (HashMap)
import qualified Data.HashMap.Strict as HashMap
import Data.HashSet (HashSet)
import qualified Data.HashSet as HashSet
import Data.Int (Int32)
import Data.List.NonEmpty (NonEmpty)
import qualified Data.List.NonEmpty as NonEmpty
@ -43,6 +46,7 @@ import qualified Language.GraphQL.Type.Schema as Schema
data Replacement = Replacement
{ variableValues :: Type.Subs
, fragmentDefinitions :: HashMap Full.Name Full.FragmentDefinition
, visitedFragments :: HashSet Full.Name
}
newtype TransformT m a = TransformT
@ -83,6 +87,9 @@ data QueryError
| CoercionError Full.VariableDefinition
| UnknownInputType Full.VariableDefinition
asks :: forall a. (Replacement -> a) -> Transform a
asks = TransformT . Reader.asks
queryError :: QueryError -> Error
queryError OperationNameRequired =
Error{ message = "Operation name is required.", locations = [], path = [] }
@ -133,12 +140,11 @@ data Field = Field
(Maybe Full.Name)
Full.Name
[Argument]
[Type.Directive]
SelectionSet
Full.Location
data Fragment = Fragment
(Maybe Full.TypeCondition) [Type.Directive] SelectionSet Full.Location
(Maybe Full.TypeCondition) SelectionSet Full.Location
data Value
= Variable Full.Name
@ -171,11 +177,11 @@ document = foldr filterOperation ([], HashMap.empty)
transform :: Full.OperationDefinition -> Transform Operation
transform (Full.OperationDefinition operationType _ _ _ selectionSet' _) = do
coercedVariableValues <- TransformT $ asks variableValues
coercedVariableValues <- asks variableValues
transformedSelections <- selectionSet selectionSet'
pure $ Operation operationType coercedVariableValues transformedSelections
transform (Full.SelectionSet selectionSet' _) = do
coercedVariableValues <- TransformT $ asks variableValues
coercedVariableValues <- asks variableValues
transformedSelections <- selectionSet selectionSet'
pure $ Operation Full.Query coercedVariableValues transformedSelections
@ -183,52 +189,61 @@ selectionSet :: Full.SelectionSet -> Transform SelectionSet
selectionSet = fmap catMaybes . traverse selection . NonEmpty.toList
selection :: Full.Selection -> Transform (Maybe Selection)
selection (Full.FieldSelection field') = Just . FieldSelection <$> field field'
selection (Full.FieldSelection field') = fmap FieldSelection <$> field field'
selection (Full.FragmentSpreadSelection fragmentSpread') =
fmap FragmentSelection <$> fragmentSpread fragmentSpread'
selection (Full.InlineFragmentSelection inlineFragment') =
Just . FragmentSelection <$> inlineFragment inlineFragment'
fmap FragmentSelection <$> inlineFragment inlineFragment'
inlineFragment :: Full.InlineFragment -> Transform Fragment
inlineFragment (Full.InlineFragment typeCondition directives selectionSet' location) = do
directives :: [Full.Directive] -> Transform (Maybe [Type.Directive])
directives = fmap Type.selection . traverse directive
inlineFragment :: Full.InlineFragment -> Transform (Maybe Fragment)
inlineFragment (Full.InlineFragment typeCondition directives' selectionSet' location) = do
transformedSelections <- selectionSet selectionSet'
transformedDirectives <- traverse directive directives
pure $ Fragment
typeCondition
transformedDirectives
transformedSelections
location
transformedDirectives <- directives directives'
pure $ transformedDirectives
>> pure (Fragment typeCondition transformedSelections location)
fragmentSpread :: Full.FragmentSpread -> Transform (Maybe Fragment)
fragmentSpread (Full.FragmentSpread spreadName directives location) = do
transformedDirectives <- traverse directive directives
possibleFragmentDefinition <- TransformT
$ asks
fragmentSpread (Full.FragmentSpread spreadName directives' location) = do
transformedDirectives <- directives directives'
visitedFragment <- asks $ HashSet.member spreadName . visitedFragments
possibleFragmentDefinition <- asks
$ HashMap.lookup spreadName
. fragmentDefinitions
case possibleFragmentDefinition of
Just (Full.FragmentDefinition _ typeCondition _ selections _) -> do
transformedSelections <- selectionSet selections
case transformedDirectives >> possibleFragmentDefinition of
Just (Full.FragmentDefinition _ typeCondition _ selections _)
| visitedFragment -> pure Nothing
| otherwise -> do
transformedSelections <- TransformT
$ local fragmentInserter
$ runTransformT
$ selectionSet selections
pure $ Just $ Fragment
(Just typeCondition)
transformedDirectives
transformedSelections
location
Nothing ->
pure Nothing
where
fragmentInserter replacement@Replacement{ visitedFragments } = replacement
{ visitedFragments = HashSet.insert spreadName visitedFragments }
field :: Full.Field -> Transform Field
field (Full.Field alias' name' arguments' directives selectionSet' location') = do
field :: Full.Field -> Transform (Maybe Field)
field (Full.Field alias' name' arguments' directives' selectionSet' location') = do
transformedSelections <- catMaybes <$> traverse selection selectionSet'
transformedDirectives <- traverse directive directives
pure $ Field
transformedDirectives <- directives directives'
let transformedField = Field
alias'
name'
(argument <$> arguments')
transformedDirectives
transformedArguments
transformedSelections
location'
pure $ transformedDirectives >> pure transformedField
where
transformedArguments = argument <$> arguments'
argument :: Full.Argument -> Argument
argument (Full.Argument name' valueNode location') =
@ -246,8 +261,7 @@ directive (Full.Directive name' arguments _)
directiveValue :: Full.Value -> Transform Type.Value
directiveValue = \case
(Full.Variable name') -> TransformT
$ asks
(Full.Variable name') -> asks
$ HashMap.lookupDefault Type.Null name'
. variableValues
(Full.Int integer) -> pure $ Type.Int integer
@ -314,6 +328,7 @@ executeRequest schema sourceDocument operationName variableValues initialValue =
let replacement = Replacement
{ variableValues = coercedVariableValues
, fragmentDefinitions = fragmentDefinitions'
, visitedFragments = mempty
}
pure
$ flip runReader replacement