Add definition module

1 files changed, 107 insertions, 0 deletions

diff --git a/src/Language/GraphQL/AST/Document.hs b/src/Language/GraphQL/AST/Document.hs
new file mode 100644
index 0000000..0350ce1
--- /dev/null
+++ b/src/Language/GraphQL/AST/Document.hs
@@ -0,0 +1,107 @@
+-- | This module defines data structures representing a GraphQL document.
+module Language.GraphQL.AST.Document
+    ( Definition(..)
+    , Document
+    , ExecutableDefinition(..)
+    ) where
+
+import Data.List.NonEmpty (NonEmpty)
+import Data.Text (Text)
+import Language.GraphQL.AST
+    ( ExecutableDefinition(..)
+    , Directive
+    , Name
+    , OperationType
+    , Type
+    , Value
+    )
+import Language.GraphQL.AST.DirectiveLocation
+
+-- | GraphQL document.
+type Document = NonEmpty Definition
+
+type NamedType = Name
+
+newtype Description = Description (Maybe Text)
+    deriving (Eq, Show)
+
+type RootOperationTypeDefinitions = NonEmpty RootOperationTypeDefinition
+
+data RootOperationTypeDefinition
+    = RootOperationTypeDefinition OperationType NamedType
+    deriving (Eq, Show)
+
+-- | All kinds of definitions that can occur in a GraphQL document.
+data Definition
+    = ExecutableDefinition ExecutableDefinition
+    | TypeSystemDefinition TypeSystemDefinition
+    | TypeSystemExtension TypeSystemExtension
+    deriving (Eq, Show)
+
+data TypeSystemDefinition
+    = SchemaDefinition [Directive] RootOperationTypeDefinitions
+    | TypeDefinition TypeDefinition
+    | DirectiveDefinition Description Name ArgumentsDefinition DirectiveLocation
+    deriving (Eq, Show)
+
+data SchemaExtension
+    = SchemaOperationExtension [Directive] RootOperationTypeDefinitions
+    | SchemaDirectiveExtension (NonEmpty Directive)
+    deriving (Eq, Show)
+
+data TypeSystemExtension
+    = SchemaExtension SchemaExtension
+    | TypeExtension TypeExtension
+    deriving (Eq, Show)
+
+newtype ImplementsInterfaces = ImplementsInterfaces (NonEmpty NamedType)
+    deriving (Eq, Show)
+newtype ImplementsInterfacesOpt = ImplementsInterfacesOpt [NamedType]
+    deriving (Eq, Show)
+
+newtype UnionMemberTypes = UnionMemberTypes (NonEmpty NamedType)
+    deriving (Eq, Show)
+newtype UnionMemberTypesOpt = UnionMemberTypesOpt [NamedType]
+    deriving (Eq, Show)
+
+newtype InputFieldsDefinition = InputFieldsDefinition (NonEmpty InputValueDefinition)
+    deriving (Eq, Show)
+newtype InputFieldsDefinitionOpt = InputFieldsDefinitionOpt [InputValueDefinition]
+    deriving (Eq, Show)
+
+data InputValueDefinition
+    = InputValueDefinition Description Name Type (Maybe Value) [Directive]
+    deriving (Eq, Show)
+
+newtype ArgumentsDefinition = ArgumentsDefinition [InputValueDefinition]
+    deriving (Eq, Show)
+
+data EnumValueDefinition = EnumValueDefinition Description Name [Directive]
+    deriving (Eq, Show)
+
+data FieldDefinition = FieldDefinition Description Name ArgumentsDefinition Type
+    deriving (Eq, Show)
+
+data TypeDefinition
+    = ScalarTypeDefinition Description Name [Directive]
+    | ObjectTypeDefinition Description Name ImplementsInterfacesOpt [Directive] [FieldDefinition]
+    | InterfaceTypeDefinition Description Name [Directive] [FieldDefinition]
+    | UnionTypeDefinition Description Name [Directive] UnionMemberTypesOpt
+    | EnumTypeDefinition Description Name [Directive] [EnumValueDefinition]
+    | InputObjectTypeDefinition Description Name [Directive] InputFieldsDefinitionOpt
+    deriving (Eq, Show)
+
+data TypeExtension
+    = ScalarTypeExtension Name (NonEmpty Directive)
+    | ObjectTypeFieldsDefinitionExtension Name ImplementsInterfacesOpt [Directive] (NonEmpty FieldDefinition)
+    | ObjectTypeDirectivesExtension Name ImplementsInterfacesOpt (NonEmpty Directive)
+    | ObjectTypeImplementsInterfacesExtension Name ImplementsInterfaces
+    | InterfaceTypeFieldsDefinitionExtension Name [Directive] (NonEmpty FieldDefinition)
+    | InterfaceTypeDirectivesExtension Name (NonEmpty Directive)
+    | UnionTypeUnionMemberTypesExtension Name [Directive] UnionMemberTypes
+    | UnionDirectivesExtension Name (NonEmpty Directive)
+    | EnumTypeEnumValuesDefinitionExtension Name [Directive] (NonEmpty EnumValueDefinition)
+    | EnumTypeDirectivesExtension Name (NonEmpty Directive)
+    | InputObjectTypeInputFieldsDefinitionExtension Name [Directive] InputFieldsDefinition
+    | InputObjectTypeDirectivesExtension Name (NonEmpty Directive)
+    deriving (Eq, Show)