@@ -10,7 +10,7 @@ module Derive.API.TH
1010 , derivingOptionsToJsonOptions
1111 , deriveApiInstances
1212 , deriveApiAndArbitraryInstances
13−#ifdef BACKEND
13+#ifndef ghcjs_HOST_OS
1414 , derivingOptionsToSchemaOptions
1515 , deriveToParamSchema
1616 , deriveToSchema
@@ -21,26 +21,28 @@ module Derive.API.TH
2121 , generateParseJSON
2222 ) where
2323
24−import Control.Monad
25−import Data.Aeson.TH as A
26−import Data.Aeson.Types
27−import Data.List
28−import Data.Map as M
29−import Data.Maybe
30−import Data.Typeable
31−import Language.Haskell.TH
32−import Language.Haskell.TH.Datatype
33−import Language.Haskell.TH.Syntax
34−
35−#ifdef BACKEND
36−import Data.OpenApi hiding (prefix)
37−import Test.QuickCheck
38−import Test.QuickCheck.Arbitrary.Generic
24+import Control.Monad
25+import Data.Aeson.TH as A
26+import Data.Aeson.Types
27+#if MIN_VERSION_th_abstraction(0,3,0)
28+import Data.Functor
29+#endif
30+import qualified Data.List as List
31+import Data.Maybe
32+import Data.Typeable
33+import Language.Haskell.TH
34+import Language.Haskell.TH.Datatype
35+import Language.Haskell.TH.Syntax
36+
37+#ifndef ghcjs_HOST_OS
38+import Data.OpenApi hiding (prefix)
39+import Test.QuickCheck
40+import Test.QuickCheck.Arbitrary.Generic
3941#endif
4042
4143-- | derive JSON and openapi3 (ToSchema) instances
4244deriveApiInstances :: DerivingOptions -> Name -> Q [Dec]
43−#ifdef BACKEND
45+#ifndef ghcjs_HOST_OS
4446deriveApiInstances opts tname = liftM2 (<>)
4547 (deriveJSON (derivingOptionsToJsonOptions opts) tname)
4648 (deriveToSchema opts tname)
@@ -49,9 +51,9 @@ deriveApiInstances opts tname =
4951 deriveJSON (derivingOptionsToJsonOptions opts) tname
5052#endif
5153
52−-- | derive JSON and openapi3 (ToSchema) and Arbitrary instances
54+-- | derive JSON and openapi3 (ToSchema) instances
5355deriveApiAndArbitraryInstances :: DerivingOptions -> Name -> Q [Dec]
54−#ifdef BACKEND
56+#ifndef ghcjs_HOST_OS
5557deriveApiAndArbitraryInstances opts tname = liftM2 (<>)
5658 (deriveApiInstances opts tname)
5759 (deriveArbitrary tname)
@@ -60,31 +62,14 @@ deriveApiAndArbitraryInstances opts tname =
6062 deriveApiInstances opts tname
6163#endif
6264
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.
65+-- We can't directly 'lift' Options into TH, so have to use this
7866data DerivingOptions = DerivingOptions
7967 { prefix :: Maybe String
8068 -- ^ Optional prefix to strip from constructors and field labels
8169 , snake :: Bool
8270 -- ^ Whether to snake constructors and field labels
8371 -- Applied after stripping prefix
84− , convertMap :: M.Map String String
85− -- ^ convert names (constructors and fields) before snake and strip prefix
8672 , unwrapUnaryRecords :: Bool
87− , omitNothingFields :: Bool
8873 , sumEncoding :: SumEncoding
8974 } deriving (Lift)
9075
@@ -94,66 +79,50 @@ defaultDerivingOptions :: DerivingOptions
9479defaultDerivingOptions = DerivingOptions
9580 { prefix = Nothing
9681 , snake = True
97− , convertMap = mempty
98− , unwrapUnaryRecords = False
99− , omitNothingFields = False
82+ , unwrapUnaryRecords = True
10083 , sumEncoding = defaultTaggedObject }
10184
10285derivingOptionsToJsonOptions :: DerivingOptions -> Options
10386derivingOptionsToJsonOptions DerivingOptions{..} = defaultOptions
104− { fieldLabelModifier = snaked . stripped . convert
105− , constructorTagModifier = snaked . stripped . convert
87+ { fieldLabelModifier = snaked . stripped
88+ , constructorTagModifier = snaked . stripped
10689 , sumEncoding
107− , omitNothingFields
10890 , unwrapUnaryRecords }
10991 where
110− convert s = fromMaybe s $ M.lookup s convertMap
11192 snaked = if snake then camelTo2 '_' else id
112− stripped = maybe id stripPrefix' prefix
113−
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
93+ stripped = maybe id stripPrefix prefix
12194
95+#ifndef ghcjs_HOST_OS
12296derivingOptionsToSchemaOptions :: DerivingOptions -> SchemaOptions
12397derivingOptionsToSchemaOptions = fromAesonOptions . derivingOptionsToJsonOptions
12498
12599deriveToParamSchema :: DerivingOptions -> Name -> Q [Dec]
126100deriveToParamSchema opts tname = do
127− body <- AppE (VarE 'genericToParamSchema)
128− . AppE (VarE 'derivingOptionsToSchemaOptions) <$> lift opts
129− pure [InstanceD Nothing []
130− (ConT ''ToParamSchema `AppT` ConT tname)
131− [FunD 'toParamSchema [Clause [] (NormalB body) []] ]]
101+ let
102+ body = AppE (VarE 'genericToParamSchema) <$>
103+ appE (pure $ VarE 'derivingOptionsToSchemaOptions) (lift opts)
104+ pure <$> instanceD
105+ (pure [])
106+ (pure $ ConT ''ToParamSchema `AppT` ConT tname)
107+ [ funD 'toParamSchema $ pure $ clause [] (normalB body) [] ]
132108
133109deriveToSchema :: DerivingOptions -> Name -> Q [Dec]
134110deriveToSchema opts tname = do
135111 tinfo <- reifyDatatype tname
136112 let
113+ tvars = datatypeVars tinfo
114+#if MIN_VERSION_th_abstraction(0,3,0)
115+ <&> VarT . tvName
116+#endif
137117 context = do
138− var <- datatypeVarsTypes tinfo
118+ var <- tvars
139119 [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) []] ] ]
120+ body = AppE (VarE 'genericDeclareNamedSchema) <$>
121+ appE (pure $ VarE 'derivingOptionsToSchemaOptions) (lift opts)
122+ pure <$> instanceD
123+ (pure context)
124+ (pure $ ConT ''ToSchema `AppT` datatypeType tinfo)
125+ [ funD 'declareNamedSchema $ pure $ clause [] (normalB body) [] ]
157126#endif
158127
159128deriveApiFromJSON :: DerivingOptions -> Name -> Q [Dec]
@@ -165,5 +134,14 @@ deriveApiToJSON = deriveToJSON . derivingOptionsToJsonOptions
165134generateParseJSON :: DerivingOptions -> Name -> Q Exp
166135generateParseJSON = mkParseJSON . derivingOptionsToJsonOptions
167136
168−stripPrefix' :: String -> String -> String
169−stripPrefix' pfx = fromMaybe <*> stripPrefix pfx
137+stripPrefix :: String -> String -> String
138+stripPrefix pfx = fromMaybe <*> List.stripPrefix pfx
139+
140+#ifndef ghcjs_HOST_OS
141+deriveArbitrary :: Name -> Q [Dec]
142+deriveArbitrary t = [d|
143+ instance Arbitrary $(conT t) where
144+ arbitrary = genericArbitrary
145+ shrink = genericShrink
146+ |]
147+#endif