{-# LANGUAGE CPP #-}
module Composite.Aeson.TH
( makeFieldJsonWrapper, makeFieldJsonWrapperExplicit
, makeRecordJsonWrapper, makeRecordJsonWrapperExplicit
) where
import Composite.Aeson.Base (JsonFormat, dimapJsonFormat, parseJsonWithFormat', toJsonWithFormat)
import Composite.Aeson.CoRecord (defaultJsonFormatField, fieldJsonFormat)
import Composite.Aeson.Formats.Default (DefaultJsonFormat, defaultJsonFormat)
import Composite.Aeson.Formats.Generic (SumStyle)
import Composite.Aeson.Record (defaultJsonFormatRecord, recordJsonFormat)
import Composite.CoRecord (Field)
import Composite.Record (Record)
import Control.Lens (_head, over)
import Data.Aeson (FromJSON(parseJSON), ToJSON(toJSON))
import Data.Char (toLower)
import Language.Haskell.TH
( Q, clause, cxt
, normalB
, recC, varBangType, bang, bangType, noSourceUnpackedness, noSourceStrictness
, Dec, funD, instanceD, newtypeD, sigD, valD
, Exp, conE, varE
, Name, mkName, newName
, varP
, conT
)
import Language.Haskell.TH.Syntax (lift)
makeFieldJsonWrapper :: String -> Name -> SumStyle -> Q [Dec]
makeFieldJsonWrapper :: String -> Name -> SumStyle -> Q [Dec]
makeFieldJsonWrapper String
wrapperName Name
tyName SumStyle
sumStyle =
String -> Name -> SumStyle -> Q Exp -> Q [Dec]
makeFieldJsonWrapperExplicit String
wrapperName Name
tyName SumStyle
sumStyle [| defaultJsonFormatField |]
makeFieldJsonWrapperExplicit :: String -> Name -> SumStyle -> Q Exp -> Q [Dec]
makeFieldJsonWrapperExplicit :: String -> Name -> SumStyle -> Q Exp -> Q [Dec]
makeFieldJsonWrapperExplicit String
wrapperNameStr Name
fieldsTyName SumStyle
sumStyle Q Exp
fieldFormatExp = do
let wrapperName :: Name
wrapperName = String -> Name
mkName String
wrapperNameStr
extractorName :: Name
extractorName = String -> Name
mkName forall a b. (a -> b) -> a -> b
$ String
"un" forall a. Semigroup a => a -> a -> a
<> String
wrapperNameStr
fieldTy :: Q Type
fieldTy = [t| Field $(conT fieldsTyName) |]
Name
formatName <- forall (m :: * -> *). Quote m => String -> m Name
newName forall a b. (a -> b) -> a -> b
$ forall s t a b. ASetter s t a b -> (a -> b) -> s -> t
over forall s a. Cons s s a a => Traversal' s a
_head Char -> Char
toLower String
wrapperNameStr forall a. Semigroup a => a -> a -> a
<> String
"Format"
forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence
[ forall (m :: * -> *).
Quote m =>
m Cxt
-> Name
-> [TyVarBndr ()]
-> Maybe Type
-> m Con
-> [m DerivClause]
-> m Dec
newtypeD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
Name
wrapperName
[]
forall a. Maybe a
Nothing
(forall (m :: * -> *). Quote m => Name -> [m VarBangType] -> m Con
recC Name
wrapperName [forall (m :: * -> *).
Quote m =>
Name -> m BangType -> m VarBangType
varBangType Name
extractorName (forall (m :: * -> *). Quote m => m Bang -> m Type -> m BangType
bangType (forall (m :: * -> *).
Quote m =>
m SourceUnpackedness -> m SourceStrictness -> m Bang
bang forall (m :: * -> *). Quote m => m SourceUnpackedness
noSourceUnpackedness forall (m :: * -> *). Quote m => m SourceStrictness
noSourceStrictness) Q Type
fieldTy)])
#if MIN_VERSION_template_haskell(2,12,0)
[]
#else
(cxt [])
#endif
, forall (m :: * -> *). Quote m => Name -> m Type -> m Dec
sigD
Name
formatName
[t| forall e. JsonFormat e $(conT wrapperName) |]
, forall (m :: * -> *).
Quote m =>
m Pat -> m Body -> [m Dec] -> m Dec
valD
(forall (m :: * -> *). Quote m => Name -> m Pat
varP Name
formatName)
(forall (m :: * -> *). Quote m => m Exp -> m Body
normalB [| dimapJsonFormat $(varE extractorName) $(conE wrapperName) (fieldJsonFormat $(lift sumStyle) $fieldFormatExp) |])
[]
, forall (m :: * -> *).
Quote m =>
m Cxt -> m Type -> [m Dec] -> m Dec
instanceD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
[t| DefaultJsonFormat $(conT wrapperName) |]
[ forall (m :: * -> *). Quote m => Name -> [m Clause] -> m Dec
funD
'defaultJsonFormat
[ forall (m :: * -> *).
Quote m =>
[m Pat] -> m Body -> [m Dec] -> m Clause
clause [] (forall (m :: * -> *). Quote m => m Exp -> m Body
normalB forall a b. (a -> b) -> a -> b
$ forall (m :: * -> *). Quote m => Name -> m Exp
varE Name
formatName) [] ]
]
, forall (m :: * -> *).
Quote m =>
m Cxt -> m Type -> [m Dec] -> m Dec
instanceD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
[t| FromJSON $(conT wrapperName) |]
[ forall (m :: * -> *). Quote m => Name -> [m Clause] -> m Dec
funD
'parseJSON
[ forall (m :: * -> *).
Quote m =>
[m Pat] -> m Body -> [m Dec] -> m Clause
clause [] (forall (m :: * -> *). Quote m => m Exp -> m Body
normalB [| parseJsonWithFormat' $(varE formatName) |]) [] ]
]
, forall (m :: * -> *).
Quote m =>
m Cxt -> m Type -> [m Dec] -> m Dec
instanceD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
[t| ToJSON $(conT wrapperName) |]
[ forall (m :: * -> *). Quote m => Name -> [m Clause] -> m Dec
funD
'toJSON
[ forall (m :: * -> *).
Quote m =>
[m Pat] -> m Body -> [m Dec] -> m Clause
clause [] (forall (m :: * -> *). Quote m => m Exp -> m Body
normalB [| toJsonWithFormat $(varE formatName) |]) [] ]
]
]
makeRecordJsonWrapper :: String -> Name -> Q [Dec]
makeRecordJsonWrapper :: String -> Name -> Q [Dec]
makeRecordJsonWrapper String
wrapperName Name
tyName =
String -> Name -> Q Exp -> Q [Dec]
makeRecordJsonWrapperExplicit String
wrapperName Name
tyName [| defaultJsonFormatRecord |]
makeRecordJsonWrapperExplicit :: String -> Name -> Q Exp -> Q [Dec]
makeRecordJsonWrapperExplicit :: String -> Name -> Q Exp -> Q [Dec]
makeRecordJsonWrapperExplicit String
wrapperNameStr Name
fieldsTyName Q Exp
recFormatExp = do
let wrapperName :: Name
wrapperName = String -> Name
mkName String
wrapperNameStr
extractorName :: Name
extractorName = String -> Name
mkName forall a b. (a -> b) -> a -> b
$ String
"un" forall a. Semigroup a => a -> a -> a
<> String
wrapperNameStr
recordTy :: Q Type
recordTy = [t| Record $(conT fieldsTyName) |]
Name
formatName <- forall (m :: * -> *). Quote m => String -> m Name
newName forall a b. (a -> b) -> a -> b
$ forall s t a b. ASetter s t a b -> (a -> b) -> s -> t
over forall s a. Cons s s a a => Traversal' s a
_head Char -> Char
toLower String
wrapperNameStr forall a. Semigroup a => a -> a -> a
<> String
"Format"
forall (t :: * -> *) (m :: * -> *) a.
(Traversable t, Monad m) =>
t (m a) -> m (t a)
sequence
[ forall (m :: * -> *).
Quote m =>
m Cxt
-> Name
-> [TyVarBndr ()]
-> Maybe Type
-> m Con
-> [m DerivClause]
-> m Dec
newtypeD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
Name
wrapperName
[]
forall a. Maybe a
Nothing
(forall (m :: * -> *). Quote m => Name -> [m VarBangType] -> m Con
recC Name
wrapperName [forall (m :: * -> *).
Quote m =>
Name -> m BangType -> m VarBangType
varBangType Name
extractorName (forall (m :: * -> *). Quote m => m Bang -> m Type -> m BangType
bangType (forall (m :: * -> *).
Quote m =>
m SourceUnpackedness -> m SourceStrictness -> m Bang
bang forall (m :: * -> *). Quote m => m SourceUnpackedness
noSourceUnpackedness forall (m :: * -> *). Quote m => m SourceStrictness
noSourceStrictness) Q Type
recordTy)])
#if MIN_VERSION_template_haskell(2,12,0)
[]
#else
(cxt [])
#endif
, forall (m :: * -> *). Quote m => Name -> m Type -> m Dec
sigD
Name
formatName
[t| forall e. JsonFormat e $(conT wrapperName) |]
, forall (m :: * -> *).
Quote m =>
m Pat -> m Body -> [m Dec] -> m Dec
valD
(forall (m :: * -> *). Quote m => Name -> m Pat
varP Name
formatName)
(forall (m :: * -> *). Quote m => m Exp -> m Body
normalB [| dimapJsonFormat $(varE extractorName) $(conE wrapperName) (recordJsonFormat $recFormatExp) |])
[]
, forall (m :: * -> *).
Quote m =>
m Cxt -> m Type -> [m Dec] -> m Dec
instanceD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
[t| DefaultJsonFormat $(conT wrapperName) |]
[ forall (m :: * -> *). Quote m => Name -> [m Clause] -> m Dec
funD
'defaultJsonFormat
[ forall (m :: * -> *).
Quote m =>
[m Pat] -> m Body -> [m Dec] -> m Clause
clause [] (forall (m :: * -> *). Quote m => m Exp -> m Body
normalB forall a b. (a -> b) -> a -> b
$ forall (m :: * -> *). Quote m => Name -> m Exp
varE Name
formatName) [] ]
]
, forall (m :: * -> *).
Quote m =>
m Cxt -> m Type -> [m Dec] -> m Dec
instanceD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
[t| FromJSON $(conT wrapperName) |]
[ forall (m :: * -> *). Quote m => Name -> [m Clause] -> m Dec
funD
'parseJSON
[ forall (m :: * -> *).
Quote m =>
[m Pat] -> m Body -> [m Dec] -> m Clause
clause [] (forall (m :: * -> *). Quote m => m Exp -> m Body
normalB [| parseJsonWithFormat' $(varE formatName) |]) [] ]
]
, forall (m :: * -> *).
Quote m =>
m Cxt -> m Type -> [m Dec] -> m Dec
instanceD
(forall (m :: * -> *). Quote m => [m Type] -> m Cxt
cxt [])
[t| ToJSON $(conT wrapperName) |]
[ forall (m :: * -> *). Quote m => Name -> [m Clause] -> m Dec
funD
'toJSON
[ forall (m :: * -> *).
Quote m =>
[m Pat] -> m Body -> [m Dec] -> m Clause
clause [] (forall (m :: * -> *). Quote m => m Exp -> m Body
normalB [| toJsonWithFormat $(varE formatName) |]) [] ]
]
]