@@ -10,14 +10,14 @@ module Derive.API.TH
1010 , derivingOptionsToJsonOptions
1111 , deriveApiInstances
1212 , deriveApiAndArbitraryInstances
13−#ifndef ghcjs_HOST_OS
13+#ifdef BACKEND
1414 , derivingOptionsToSchemaOptions
1515 , deriveToParamSchema
1616 , deriveToSchema
17+ , deriveArbitrary
1718#endif
1819 , deriveApiFromJSON
1920 , deriveApiToJSON
20− , deriveArbitrary
2121 , generateParseJSON
2222 ) where
2323
@@ -25,21 +25,22 @@ import Control.Monad
2525import Data.Aeson.TH as A
2626import Data.Aeson.Types
2727import Data.List
28+import Data.Map as M
2829import Data.Maybe
2930import Data.Typeable
3031import Language.Haskell.TH
3132import Language.Haskell.TH.Datatype
3233import Language.Haskell.TH.Syntax
33−import Test.QuickCheck
34−import Test.QuickCheck.Arbitrary.Generic
3534
36−#ifndef ghcjs_HOST_OS
35+#ifdef BACKEND
3736import Data.OpenApi hiding (prefix)
37+import Test.QuickCheck
38+import Test.QuickCheck.Arbitrary.Generic
3839#endif
3940
4041-- | derive JSON and openapi3 (ToSchema) instances
4142deriveApiInstances :: DerivingOptions -> Name -> Q [Dec]
42−#ifndef ghcjs_HOST_OS
43+#ifdef BACKEND
4344deriveApiInstances opts tname = liftM2 (<>)
4445 (deriveJSON (derivingOptionsToJsonOptions opts) tname)
4546 (deriveToSchema opts tname)
@@ -50,7 +51,7 @@ deriveApiInstances opts tname =
5051
5152-- | derive JSON and openapi3 (ToSchema) and Arbitrary instances
5253deriveApiAndArbitraryInstances :: DerivingOptions -> Name -> Q [Dec]
53−#ifndef ghcjs_HOST_OS
54+#ifdef BACKEND
5455deriveApiAndArbitraryInstances opts tname = liftM2 (<>)
5556 (deriveApiInstances opts tname)
5657 (deriveArbitrary tname)
@@ -59,13 +60,29 @@ deriveApiAndArbitraryInstances opts tname =
5960 deriveApiInstances opts tname
6061#endif
6162
62−-- We can't directly 'lift' Options into TH, so have to use this
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.
6378data DerivingOptions = DerivingOptions
6479 { prefix :: Maybe String
6580 -- ^ Optional prefix to strip from constructors and field labels
6681 , snake :: Bool
6782 -- ^ Whether to snake constructors and field labels
6883 -- Applied after stripping prefix
84+ , convertMap :: M.Map String String
85+ -- ^ convert names (constructors and fields) before snake and strip prefix
6986 , unwrapUnaryRecords :: Bool
7087 , omitNothingFields :: Bool
7188 , sumEncoding :: SumEncoding
@@ -77,34 +94,41 @@ defaultDerivingOptions :: DerivingOptions
7794defaultDerivingOptions = DerivingOptions
7895 { prefix = Nothing
7996 , snake = True
97+ , convertMap = mempty
8098 , unwrapUnaryRecords = False
8199 , omitNothingFields = False
82100 , sumEncoding = defaultTaggedObject }
83101
84102derivingOptionsToJsonOptions :: DerivingOptions -> Options
85103derivingOptionsToJsonOptions DerivingOptions{..} = defaultOptions
86− { fieldLabelModifier = snaked . stripped
87− , constructorTagModifier = snaked . stripped
104+ { fieldLabelModifier = snaked . stripped . convert
105+ , constructorTagModifier = snaked . stripped . convert
88106 , sumEncoding
89107 , omitNothingFields
90108 , unwrapUnaryRecords }
91109 where
110+ convert s = fromMaybe s $ M.lookup s convertMap
92111 snaked = if snake then camelTo2 '_' else id
93112 stripped = maybe id stripPrefix' prefix
94113
95−#ifndef ghcjs_HOST_OS
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+
96122derivingOptionsToSchemaOptions :: DerivingOptions -> SchemaOptions
97123derivingOptionsToSchemaOptions = fromAesonOptions . derivingOptionsToJsonOptions
98124
99125deriveToParamSchema :: DerivingOptions -> Name -> Q [Dec]
100126deriveToParamSchema opts tname = do
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) [] ]
127+ body <- AppE (VarE 'genericToParamSchema)
128+ . AppE (VarE 'derivingOptionsToSchemaOptions) <$> lift opts
129+ pure [InstanceD Nothing []
130+ (ConT ''ToParamSchema `AppT` ConT tname)
131+ [FunD 'toParamSchema [Clause [] (NormalB body) []] ]]
108132
109133deriveToSchema :: DerivingOptions -> Name -> Q [Dec]
110134deriveToSchema opts tname = do
@@ -113,26 +137,18 @@ deriveToSchema opts tname = do
113137 context = do
114138 var <- datatypeVarsTypes tinfo
115139 [ConT ''Typeable `AppT` var, ConT ''ToSchema `AppT` var]
116− body = AppE (VarE 'genericDeclareNamedSchema) <$>
117− appE (pure $ VarE 'derivingOptionsToSchemaOptions) (lift opts)
118− pure <$> instanceD
119− (pure context)
120− (pure $ ConT ''ToSchema `AppT` datatypeType tinfo)
121− [ funD 'declareNamedSchema $ pure $ clause [] (normalB body) [] ]
122−
123−datatypeVarsTypes :: DatatypeInfo -> [Type]
124−#if MIN_VERSION_th_abstraction(0,3,0)
125−datatypeVarsTypes = fmap (VarT . tvName) . datatypeVars
126−#else
127−datatypeVarsTypes = datatypeVars
128−#endif
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) []] ]]
129145
130146deriveArbitrary :: Name -> Q [Dec]
131−deriveArbitrary t = do
147+deriveArbitrary t = do
132148 tinfo <- reifyDatatype t
133− let
149+ let
134150 typ = datatypeType tinfo
135− ctx = datatypeVarsTypes tinfo >>= \tv ->
151+ ctx = datatypeVarsTypes tinfo >>= \tv ->
136152 [ ConT ''Arbitrary `AppT` tv
137153 , ConT ''Arg `AppT` typ `AppT` tv ]
138154 pure [InstanceD Nothing ctx (ConT ''Arbitrary `AppT` typ)
@@ -151,4 +167,3 @@ generateParseJSON = mkParseJSON . derivingOptionsToJsonOptions
151167
152168stripPrefix' :: String -> String -> String
153169stripPrefix' pfx = fromMaybe <*> stripPrefix pfx
154−