forked from OSS/graphql
46 lines
1.3 KiB
Haskell
46 lines
1.3 KiB
Haskell
{-# LANGUAGE CPP #-}
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{-# LANGUAGE LambdaCase #-}
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{-# LANGUAGE OverloadedStrings #-}
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module Test.StarWars.Schema where
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import Control.Applicative (Alternative, empty)
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#if !MIN_VERSION_base(4,8,0)
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import Control.Applicative ((<$>))
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import Data.Traversable (traverse)
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#endif
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import Data.GraphQL.Schema
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import qualified Data.GraphQL.Schema as Schema
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import Test.StarWars.Data
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-- * Schema
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-- See https://github.com/graphql/graphql-js/blob/master/src/__tests__/starWarsSchema.js
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schema :: Alternative f => Schema f
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schema = Schema [hero, human, droid]
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hero :: Alternative f => Resolver f
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hero = Schema.objectA "hero" $ \case
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[] -> character artoo
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[Argument "episode" (ValueInt n)] -> character $ getHero (fromIntegral n)
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_ -> empty
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human :: Alternative f => Resolver f
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human = Schema.objectA "human" $ \case
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[Argument "id" (ValueString i)] -> character =<< getHuman i
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_ -> empty
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droid :: Alternative f => Resolver f
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droid = Schema.objectA "droid" $ \case
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[Argument "id" (ValueString i)] -> character =<< getDroid i
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_ -> empty
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character :: Alternative f => Character -> [Resolver f]
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character char =
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[ Schema.scalar "id" $ id_ char
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, Schema.scalar "name" $ name char
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, Schema.array "friends" $ character <$> getFriends char
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, Schema.enum "appearsIn" . traverse getEpisode $ appearsIn char
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]
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