{-# LANGUAGE DataKinds #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE TemplateHaskell #-}
{-# LANGUAGE TypeFamilies #-}
module Data.GraphQL.Query (
GraphQLQuery (..),
query,
) where
import Data.Aeson (Value)
import Data.Aeson.Schema (IsSchema, Schema)
import Data.Text (Text)
import qualified Data.Text as Text
import Language.Haskell.TH.Quote (QuasiQuoter (..))
import Language.Haskell.TH.Syntax (lift)
class (IsSchema (ResultSchema query)) => GraphQLQuery query where
type ResultSchema query :: Schema
getQueryName :: query -> Text
getQueryText :: query -> Text
getArgs :: query -> Value
query :: QuasiQuoter
query :: QuasiQuoter
query =
QuasiQuoter
{ quoteExp :: String -> Q Exp
quoteExp = forall {m :: * -> *}. Quote m => Text -> m Exp
liftText forall b c a. (b -> c) -> (a -> b) -> a -> c
. Text -> Text
Text.strip forall b c a. (b -> c) -> (a -> b) -> a -> c
. String -> Text
Text.pack
, quotePat :: String -> Q Pat
quotePat = forall a. HasCallStack => String -> a
error String
"Cannot use the 'query' QuasiQuoter for patterns"
, quoteType :: String -> Q Type
quoteType = forall a. HasCallStack => String -> a
error String
"Cannot use the 'query' QuasiQuoter for types"
, quoteDec :: String -> Q [Dec]
quoteDec = forall a. HasCallStack => String -> a
error String
"Cannot use the 'query' QuasiQuoter for declarations"
}
where
liftText :: Text -> m Exp
liftText Text
s = [|Text.pack $(lift $ Text.unpack s)|]