@@ -10,14 +10,14 @@ module Derive.API.TH
1010 , derivingOptionsToJsonOptions
1111 , deriveApiInstances
1212 , deriveApiAndArbitraryInstances
13−#ifdef BACKEND
13+#ifndef ghcjs_HOST_OS
1414 , derivingOptionsToSchemaOptions
1515 , deriveToParamSchema
1616 , deriveToSchema
17− , deriveArbitrary
1817#endif
1918 , deriveApiFromJSON
2019 , deriveApiToJSON
20+ , deriveArbitrary
2121 , generateParseJSON
2222 ) where
2323
@@ -25,22 +25,21 @@ import Control.Monad
2525import Data.Aeson.TH as A
2626import Data.Aeson.Types
2727import Data.List
28−import Data.Map as M
2928import Data.Maybe
3029import Data.Typeable
3130import Language.Haskell.TH
3231import Language.Haskell.TH.Datatype
3332import Language.Haskell.TH.Syntax
34−
35−#ifdef BACKEND
36−import Data.OpenApi hiding (prefix)
3733import Test.QuickCheck
3834import Test.QuickCheck.Arbitrary.Generic
35+
36+#ifndef ghcjs_HOST_OS
37+import Data.OpenApi hiding (prefix)
3938#endif
4039
4140-- | derive JSON and openapi3 (ToSchema) instances
4241deriveApiInstances :: DerivingOptions -> Name -> Q [Dec]
43−#ifdef BACKEND
42+#ifndef ghcjs_HOST_OS
4443deriveApiInstances opts tname = liftM2 (<>)
4544 (deriveJSON (derivingOptionsToJsonOptions opts) tname)
4645 (deriveToSchema opts tname)
@@ -49,9 +48,9 @@ deriveApiInstances opts tname =
4948 deriveJSON (derivingOptionsToJsonOptions opts) tname
5049#endif
5150
52−-- | derive JSON and openapi3 (ToSchema) and Arbitrary instances
51+-- | derive JSON and openapi3 (ToSchema) instances
5352deriveApiAndArbitraryInstances :: DerivingOptions -> Name -> Q [Dec]
54−#ifdef BACKEND
53+#ifndef ghcjs_HOST_OS
5554deriveApiAndArbitraryInstances opts tname = liftM2 (<>)
5655 (deriveApiInstances opts tname)
5756 (deriveArbitrary tname)
@@ -60,31 +59,14 @@ deriveApiAndArbitraryInstances opts tname =
6059 deriveApiInstances opts tname
6160#endif
6261
63−#if MIN_VERSION_containers(0,6,6)
64−#elif MIN_VERSION_template_haskell(2,17,0)
65−instance (Lift k, Lift a) => Lift (Map k a) where
66− liftTyped x = unsafeCodeCoerce (lift x)
67− lift m = [|M.fromList (M.toList m)|]
68−#elif MIN_VERSION_template_haskell(2,16,0)
69−instance (Lift k, Lift a) => Lift (Map k a) where
70− liftTyped x = unsafeTExpCoerce (lift x)
71− lift m = [|M.fromList (M.toList m)|]
72−#else
73−instance (Lift k, Lift a) => Lift (Map k a) where
74− lift m = [|M.fromList (M.toList m)|]
75−#endif
76−-- We can't directly 'lift' Options into TH (there is no instance for function),
77−-- so we use this type.
62+-- We can't directly 'lift' Options into TH, so have to use this
7863data DerivingOptions = DerivingOptions
7964 { prefix :: Maybe String
8065 -- ^ Optional prefix to strip from constructors and field labels
8166 , snake :: Bool
8267 -- ^ Whether to snake constructors and field labels
8368 -- Applied after stripping prefix
84− , convertMap :: M.Map String String
85− -- ^ convert names (constructors and fields) before snake and strip prefix
8669 , unwrapUnaryRecords :: Bool
87− , omitNothingFields :: Bool
8870 , sumEncoding :: SumEncoding
8971 } deriving (Lift)
9072
@@ -94,66 +76,51 @@ defaultDerivingOptions :: DerivingOptions
9476defaultDerivingOptions = DerivingOptions
9577 { prefix = Nothing
9678 , snake = True
97− , convertMap = mempty
98− , unwrapUnaryRecords = False
99− , omitNothingFields = False
79+ , unwrapUnaryRecords = True
10080 , sumEncoding = defaultTaggedObject }
10181
10282derivingOptionsToJsonOptions :: DerivingOptions -> Options
10383derivingOptionsToJsonOptions DerivingOptions{..} = defaultOptions
104− { fieldLabelModifier = snaked . stripped . convert
105− , constructorTagModifier = snaked . stripped . convert
84+ { fieldLabelModifier = snaked . stripped
85+ , constructorTagModifier = snaked . stripped
10686 , sumEncoding
107− , omitNothingFields
10887 , unwrapUnaryRecords }
10988 where
110− convert s = fromMaybe s $ M.lookup s convertMap
11189 snaked = if snake then camelTo2 '_' else id
11290 stripped = maybe id stripPrefix' prefix
11391
114−#ifdef BACKEND
115−datatypeVarsTypes :: DatatypeInfo -> [Type]
116−#if MIN_VERSION_th_abstraction(0,3,0)
117−datatypeVarsTypes = fmap (VarT . tvName) . datatypeVars
118−#else
119−datatypeVarsTypes = datatypeVars
120−#endif
121−
92+#ifndef ghcjs_HOST_OS
12293derivingOptionsToSchemaOptions :: DerivingOptions -> SchemaOptions
12394derivingOptionsToSchemaOptions = fromAesonOptions . derivingOptionsToJsonOptions
12495
12596deriveToParamSchema :: DerivingOptions -> Name -> Q [Dec]
12697deriveToParamSchema opts tname = do
127− body <- AppE (VarE 'genericToParamSchema)
128− . AppE (VarE 'derivingOptionsToSchemaOptions) <$> lift opts
129− pure [InstanceD Nothing []
130− (ConT ''ToParamSchema `AppT` ConT tname)
131− [FunD 'toParamSchema [Clause [] (NormalB body) []] ]]
98+ let
99+ body = AppE (VarE 'genericToParamSchema) <$>
100+ appE (pure $ VarE 'derivingOptionsToSchemaOptions) (lift opts)
101+ pure <$> instanceD
102+ (pure [])
103+ (pure $ ConT ''ToParamSchema `AppT` ConT tname)
104+ [ funD 'toParamSchema $ pure $ clause [] (normalB body) [] ]
132105
133106deriveToSchema :: DerivingOptions -> Name -> Q [Dec]
134107deriveToSchema opts tname = do
135108 tinfo <- reifyDatatype tname
136109 let
110+#if MIN_VERSION_th_abstraction(0,3,0)
111+ tvars = VarT . tvName <$> datatypeVars tinfo
112+#else
113+ tvars = datatypeVars tinfo
114+#endif
137115 context = do
138− var <- datatypeVarsTypes tinfo
116+ var <- tvars
139117 [ConT ''Typeable `AppT` var, ConT ''ToSchema `AppT` var]
140− body <- AppE (VarE 'genericDeclareNamedSchema)
141− . AppE (VarE 'derivingOptionsToSchemaOptions) <$> lift opts
142− pure [InstanceD Nothing context
143− (ConT ''ToSchema `AppT` datatypeType tinfo)
144− [ FunD 'declareNamedSchema [Clause [] (NormalB body) []] ]]
145−
146−deriveArbitrary :: Name -> Q [Dec]
147−deriveArbitrary t = do
148− tinfo <- reifyDatatype t
149− let
150− typ = datatypeType tinfo
151− ctx = datatypeVarsTypes tinfo >>= \tv ->
152− [ ConT ''Arbitrary `AppT` tv
153− , ConT ''Arg `AppT` typ `AppT` tv ]
154− pure [InstanceD Nothing ctx (ConT ''Arbitrary `AppT` typ)
155− [ FunD 'arbitrary [Clause [] (NormalB $ VarE 'genericArbitrary) []]
156− , FunD 'shrink [Clause [] (NormalB $ VarE 'genericShrink) []] ] ]
118+ body = AppE (VarE 'genericDeclareNamedSchema) <$>
119+ appE (pure $ VarE 'derivingOptionsToSchemaOptions) (lift opts)
120+ pure <$> instanceD
121+ (pure context)
122+ (pure $ ConT ''ToSchema `AppT` datatypeType tinfo)
123+ [ funD 'declareNamedSchema $ pure $ clause [] (normalB body) [] ]
157124#endif
158125
159126deriveApiFromJSON :: DerivingOptions -> Name -> Q [Dec]
@@ -167,3 +134,10 @@ generateParseJSON = mkParseJSON . derivingOptionsToJsonOptions
167134
168135stripPrefix' :: String -> String -> String
169136stripPrefix' pfx = fromMaybe <*> stripPrefix pfx
137+
138+deriveArbitrary :: Name -> Q [Dec]
139+deriveArbitrary t = [d|
140+ instance Arbitrary $(conT t) where
141+ arbitrary = genericArbitrary
142+ shrink = genericShrink
143+ |]