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|
-- | This is the AST meant to be executed.
module Language.GraphQL.AST.Core
( Alias
, Arguments(..)
, Directive(..)
, Field(..)
, Fragment(..)
, Name
, Operation(..)
, Selection(..)
, TypeCondition
) where
import Data.HashMap.Strict (HashMap)
import Data.Sequence (Seq)
import Data.Text (Text)
import Language.GraphQL.AST (Alias, Name, TypeCondition)
import qualified Language.GraphQL.Type.In as In
-- | GraphQL has 3 operation types: queries, mutations and subscribtions.
--
-- Currently only queries and mutations are supported.
data Operation
= Query (Maybe Text) (Seq Selection)
| Mutation (Maybe Text) (Seq Selection)
deriving (Eq, Show)
-- | Single GraphQL field.
data Field
= Field (Maybe Alias) Name Arguments (Seq Selection)
deriving (Eq, Show)
-- | Argument list.
newtype Arguments = Arguments (HashMap Name In.Value)
deriving (Eq, Show)
instance Semigroup Arguments where
(Arguments x) <> (Arguments y) = Arguments $ x <> y
instance Monoid Arguments where
mempty = Arguments mempty
-- | Directive.
data Directive = Directive Name Arguments
deriving (Eq, Show)
-- | Represents fragments and inline fragments.
data Fragment
= Fragment TypeCondition (Seq Selection)
deriving (Eq, Show)
-- | Single selection element.
data Selection
= SelectionFragment Fragment
| SelectionField Field
deriving (Eq, Show)
|
