43d2526 · typeable/schematic

git.iko.soy/typeable/schematic

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43d2526Denis Redozubov8 years ago

src/Data/Schematic/Validation.hs+50−50

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unifiedsplit

@@ -1,19 +1,24 @@

1+{-# LANGUAGE AllowAmbiguousTypes #-}

1module Data.Schematic.Validation where

3module Data.Schematic.Validation where

5+import Control.Applicative

3import Control.Monad

6import Control.Monad

4import Control.Monad.Validation

7import Control.Monad.Validation

5import Data.Aeson

8import Data.Aeson

6import Data.Aeson.Types

9import Data.Aeson.Types

10+import Data.Coerce

7import Data.Foldable

11import Data.Foldable

8import Data.Functor.Identity

12import Data.Functor.Identity

9import Data.Monoid

13import Data.Monoid

10import Data.Schematic.Path

14import Data.Schematic.Path

11import Data.Schematic.Schema

15import Data.Schematic.Schema

12import Data.Scientific

16import Data.Scientific

13−import Data.Singletons.Prelude

17+import Data.Singletons.Prelude hiding (Const)

14import Data.Singletons.TypeLits

18import Data.Singletons.TypeLits

15import Data.Text as T

19import Data.Text as T

16import Data.Traversable

20import Data.Traversable

21+import Data.Type.Equality

17import Data.Union

22import Data.Union

18import Data.Vector as V

23import Data.Vector as V

19import Data.Vinyl

24import Data.Vinyl

@@ -161,13 +166,16 @@ validateArrayConstraint (JSONPath path) v = \case

161 warn = vWarning $ mmSingleton path (pure errMsg)

166 warn = vWarning $ mmSingleton path (pure errMsg)

162 unless predicate warn

167 unless predicate warn

163

168

169+class Validatable schema where

170+ validateJsonRepr :: [DemotedPathSegment] -> JsonRepr schema -> Validation ()

171+

164validateJsonRepr

172validateJsonRepr

165− :: Sing schema

173+ :: forall schema. SingI schema

166− -> [DemotedPathSegment]

174+ => [DemotedPathSegment]

167 -> JsonRepr schema

175 -> JsonRepr schema

168 -> Validation ()

176 -> Validation ()

169−validateJsonRepr sschema dpath jr = case jr of

177+validateJsonRepr dpath jr = withSingI (sing :: Sing schema) $ case jr of

170− ReprText t -> case sschema of

178+ ReprText t -> case sing :: Sing schema of

171 SSchemaText scs -> do

179 SSchemaText scs -> do

172 let

180 let

173 process :: Sing (cs :: [TextConstraint]) -> Validation ()

181 process :: Sing (cs :: [TextConstraint]) -> Validation ()

@@ -176,7 +184,7 @@ validateJsonRepr sschema dpath jr = case jr of

176 validateTextConstraint (demotedPathToText dpath) t c

184 validateTextConstraint (demotedPathToText dpath) t c

177 process cs

185 process cs

178 process scs

186 process scs

179− ReprNumber n -> case sschema of

187+ ReprNumber n -> case sing :: Sing schema of

180 SSchemaNumber scs -> do

188 SSchemaNumber scs -> do

181 let

189 let

182 process :: Sing (cs :: [NumberConstraint]) -> Validation ()

190 process :: Sing (cs :: [NumberConstraint]) -> Validation ()

@@ -187,7 +195,7 @@ validateJsonRepr sschema dpath jr = case jr of

187 process scs

195 process scs

188 ReprNull -> pure ()

196 ReprNull -> pure ()

189 ReprBoolean _ -> pure ()

197 ReprBoolean _ -> pure ()

190− ReprArray v -> case sschema of

198+ ReprArray v -> case sing :: Sing schema of

191 SSchemaArray acs s -> do

199 SSchemaArray acs s -> do

192 let

200 let

193 process :: Sing (cs :: [ArrayConstraint]) -> Validation ()

201 process :: Sing (cs :: [ArrayConstraint]) -> Validation ()

@@ -198,60 +206,52 @@ validateJsonRepr sschema dpath jr = case jr of

198 process acs

206 process acs

199 for_ (V.indexed v) $ \(ix, jr') -> do

207 for_ (V.indexed v) $ \(ix, jr') -> do

200 let newPath = dpath <> pure (DIx $ fromIntegral ix)

208 let newPath = dpath <> pure (DIx $ fromIntegral ix)

201− validateJsonRepr s newPath jr'

209+ withSingI s $ validateJsonRepr newPath jr'

202− ReprOptional d -> case sschema of

210+ ReprOptional d -> case sing :: Sing schema of

203 SSchemaOptional ss -> case d of

211 SSchemaOptional ss -> case d of

204− Just x -> validateJsonRepr ss dpath x

212+ Just x -> withSingI ss $ validateJsonRepr dpath x

205 Nothing -> pure ()

213 Nothing -> pure ()

206− ReprObject fs -> case sschema of

214+ ReprObject fs -> case sing :: Sing schema of

207 SSchemaObject _ -> go fs

215 SSchemaObject _ -> go fs

208 where

216 where

209 go :: Rec FieldRepr (ts :: [(Symbol, Schema)] ) -> Validation ()

217 go :: Rec FieldRepr (ts :: [(Symbol, Schema)] ) -> Validation ()

210 go RNil = pure ()

218 go RNil = pure ()

211 go (f@(FieldRepr d) :& ftl) = do

219 go (f@(FieldRepr d) :& ftl) = do

212 let newPath = dpath <> [DKey (knownFieldName f)]

220 let newPath = dpath <> [DKey (knownFieldName f)]

213− validateJsonRepr (knownFieldSchema f) newPath d

221+ withSingI (knownFieldSchema f)

222+ $ validateJsonRepr newPath d

214 go ftl

223 go ftl

215− ReprUnion _ -> pure () -- FIXME

224+ ReprUnion u -> pure () -- upeel u (sing :: Sing schema)

225+ -- ReprUnion u -> do

226+ -- let

227+ -- v :: forall s. JsonRepr s -> Const (Validation ()) s

228+ -- v j = Const $ validateJsonRepr (singByProxy j) dpath j

229+ -- peel :: Union (Const (Validation ())) ts -> Validation ()

230+ -- peel (That u) = peel u

231+ -- peel (This v) = getConst v

232+ -- peel (umap v u)

233+ -- ReprUnion u -> do

234+ -- let

235+ -- peel :: Union JsonRepr ss -> [DemotedSchema] -> Validation ()

236+ -- peel (That u) ds = peel u ds

237+ -- peel (This j) ds = case ds of

238+ -- [] -> error "peeling error: report this as a schematic bug"

239+ -- (ds' :_) -> let s' = toSing ds'

240+ -- in case s' of

241+ -- SomeSing s -> case s `testEquality` (singByProxy j) of

242+ -- Just Refl -> validateJsonRepr s dpath j

216− -- case sschema of

243+ -- case sschema of

217− -- SSchemaUnion ss -> case ss of

244+ -- SSchemaUnion us -> peel u (fromSing us)

218− -- SCons s stl -> case umatch' s u of

219− -- Nothing -> case urestrict u of

220− -- Nothing ->

221− -- fail "impossible to produce subUnion, please report this as a bug"

222− -- Just x -> do

223− -- let

224− -- JSONPath path = demotedPathToText dpath

225− -- case stl of

226− -- SNil -> void $ vWarning $ mmSingleton path

227− -- $ pure "union handling error, please report this as bug"

228− -- SCons s' stl' ->

229− -- validateJsonRepr (SSchemaUnion (SCons s' stl')) dpath

230− -- $ toUnion (SCons s' stl') x

231− -- Just x -> validateJsonRepr s dpath x

232−

233−-- subUnion

234−-- :: Sing (s ': stl)

235−-- -> ( USubset stl (s ': stl) (RImage stl (s ': stl))

236−-- => Union f (s ': stl)

237−-- -> Maybe (Union f stl) )

238−-- subUnion (SCons s stl) = urestrict

239

245

240−-- withUSubset

246+class UPeel ss where

241−-- :: Sing (s ': stl)

247+ upeel :: Union JsonRepr ss -> Sing (SchemaUnion ss :: Schema) -> Validation ()

242−-- -> (USubset stl (s ': stl) (RImage stl (s ': stl)) => Maybe (Union f stl))

243−-- -> Maybe (Union f stl)

244−-- withUSubset (SCons s stl) r = r

245

248

246−toUnion

249+instance (UPeel stl) => UPeel (s ': stl) where

247− :: USubset s' (s ': ss) (RImage s' (s ': ss))

250+ upeel (That u) (SSchemaUnion (SCons _ stl)) = upeel @stl u (SSchemaUnion stl)

248− => Sing (s ': ss)

251+ upeel (This j) (SSchemaUnion (SCons s _)) = withSingI s $ validateJsonRepr mempty j

249− -> Union JsonRepr s'

250− -> JsonRepr ('SchemaUnion (s ': ss))

251−toUnion _ = ReprUnion . urelax

252

253−umatch' :: UElem a as i => Sing a -> Union f as -> Maybe (f a)

253+umatch' :: UElem a as i => Sing a -> Union JsonRepr as -> Maybe (JsonRepr a)

254−umatch' _ u = umatch u

254+umatch' _ = umatch

255

256parseAndValidateJson

257 :: forall schema

@@ -263,7 +263,7 @@ parseAndValidateJson v =

263 Left s -> DecodingError $ T.pack s

264 Right jsonRepr ->

265 let

266− validate = validateJsonRepr (sing :: Sing schema) [] jsonRepr

266+ validate = validateJsonRepr [] jsonRepr

267 res = runIdentity . runValidationTEither $ validate

268 in case res of

269 Left em -> ValidationError em