forked from OSS/graphql
64 lines
2.1 KiB
Haskell
64 lines
2.1 KiB
Haskell
{-# LANGUAGE OverloadedStrings #-}
|
|
module Test.StarWars.Schema
|
|
( character
|
|
, droid
|
|
, hero
|
|
, human
|
|
, schema
|
|
) where
|
|
|
|
import Control.Monad.IO.Class (MonadIO(..))
|
|
import Control.Monad.Trans.Except (throwE)
|
|
import Control.Monad.Trans.Class (lift)
|
|
import Data.List.NonEmpty (NonEmpty(..))
|
|
import Data.Maybe (catMaybes)
|
|
import qualified Language.GraphQL.Schema as Schema
|
|
import Language.GraphQL.Trans
|
|
import qualified Language.GraphQL.Type as Type
|
|
import Test.StarWars.Data
|
|
|
|
-- See https://github.com/graphql/graphql-js/blob/master/src/__tests__/starWarsSchema.js
|
|
|
|
schema :: MonadIO m => NonEmpty (Schema.Resolver m)
|
|
schema = hero :| [human, droid]
|
|
|
|
hero :: MonadIO m => Schema.Resolver m
|
|
hero = Schema.object "hero" $ do
|
|
episode <- argument "episode"
|
|
character $ case episode of
|
|
Schema.Enum "NEWHOPE" -> getHero 4
|
|
Schema.Enum "EMPIRE" -> getHero 5
|
|
Schema.Enum "JEDI" -> getHero 6
|
|
_ -> artoo
|
|
|
|
human :: MonadIO m => Schema.Resolver m
|
|
human = Schema.wrappedObject "human" $ do
|
|
id' <- argument "id"
|
|
case id' of
|
|
Schema.String i -> do
|
|
humanCharacter <- lift $ return $ getHuman i >>= Just
|
|
case humanCharacter of
|
|
Nothing -> return Type.Null
|
|
Just e -> Type.Named <$> character e
|
|
_ -> ActionT $ throwE "Invalid arguments."
|
|
|
|
droid :: MonadIO m => Schema.Resolver m
|
|
droid = Schema.object "droid" $ do
|
|
id' <- argument "id"
|
|
case id' of
|
|
Schema.String i -> character =<< liftIO (getDroid i)
|
|
_ -> ActionT $ throwE "Invalid arguments."
|
|
|
|
character :: MonadIO m => Character -> ActionT m [Schema.Resolver m]
|
|
character char = return
|
|
[ Schema.scalar "id" $ return $ id_ char
|
|
, Schema.scalar "name" $ return $ name char
|
|
, Schema.wrappedObject "friends"
|
|
$ traverse character $ Type.List $ Type.Named <$> getFriends char
|
|
, Schema.wrappedScalar "appearsIn" $ return . Type.List
|
|
$ catMaybes (getEpisode <$> appearsIn char)
|
|
, Schema.scalar "secretBackstory" $ secretBackstory char
|
|
, Schema.scalar "homePlanet" $ return $ either mempty homePlanet char
|
|
, Schema.scalar "__typename" $ return $ typeName char
|
|
]
|