mu-lens (empty) → 0.3.0.0
raw patch · 3 files changed
+633/−0 lines, 3 filesdep +basedep +containersdep +generic-lens
Dependencies added: base, containers, generic-lens, lens, mu-rpc, mu-schema, sop-core, text
Files
- LICENSE +202/−0
- mu-lens.cabal +36/−0
- src/Mu/Schema/Lens.hs +395/−0
+ LICENSE view
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+ mu-lens.cabal view
@@ -0,0 +1,36 @@+name: mu-lens+version: 0.3.0.0+synopsis: Lenses for @mu-schema@ terms+description:+ With @mu-schema@ you can describe schemas using type-level constructs, and derive serializers from those. This package provides convenient access using @lens@es.++license: Apache-2.0+license-file: LICENSE+author: Andre Marianiello+maintainer: alejandro.serrano@47deg.com+copyright: Copyright © 2019-2020 <http://47deg.com 47 Degrees>+category: Network+build-type: Simple+cabal-version: >=1.10+homepage: https://higherkindness.io/mu-haskell/+bug-reports: https://github.com/higherkindness/mu-haskell/issues++source-repository head+ type: git+ location: https://github.com/higherkindness/mu-haskell++library+ exposed-modules: Mu.Schema.Lens+ build-depends:+ base >=4.12 && <5+ , containers+ , lens+ , generic-lens+ , mu-schema+ , mu-rpc+ , sop-core+ , text++ hs-source-dirs: src+ default-language: Haskell2010+ ghc-options: -Wall
+ src/Mu/Schema/Lens.hs view
@@ -0,0 +1,395 @@+{-# language AllowAmbiguousTypes #-}+{-# language DataKinds #-}+{-# language FlexibleContexts #-}+{-# language FlexibleInstances #-}+{-# language FunctionalDependencies #-}+{-# language GADTs #-}+{-# language InstanceSigs #-}+{-# language LambdaCase #-}+{-# language OverloadedLabels #-}+{-# language PartialTypeSignatures #-}+{-# language PolyKinds #-}+{-# language QuantifiedConstraints #-}+{-# language RankNTypes #-}+{-# language ScopedTypeVariables #-}+{-# language TypeApplications #-}+{-# language TypeFamilies #-}+{-# language TypeOperators #-}+{-# language UndecidableInstances #-}+{-# OPTIONS_GHC -fno-warn-orphans #-}++module Mu.Schema.Lens (+ record,+ is+) where++import Control.Lens+import Data.Kind+import Data.Map+import Data.SOP+import qualified Data.Text as T+++import GHC.Int+import GHC.OverloadedLabels+import GHC.TypeLits hiding (Nat)+import Mu.Schema++is :: s -> APrism' s () -> Bool+is s l = not $ isn't l s++-- we need structurally inductive Nats+data Nat = Zero | Succ Nat++record :: BuildRecord sch args r => r -> Term sch ('DRecord name args)+record = TRecord . buildR++class BuildRecord (sch :: Schema Symbol Symbol) (args :: [FieldDef Symbol Symbol]) (r :: Type) | sch args -> r where+ buildR :: r -> NP (Field sch) args++instance+ {-# OVERLAPPABLE #-}+ ( Interpret sch fieldType ~ r,+ Uninterpret r ~ fieldType,+ UninterpretField sch r+ ) =>+ BuildRecord+ sch+ '[ 'FieldDef fieldName fieldType+ ]+ r+ where+ buildR val = Field (toFieldValue val) :* Nil++instance+ ( Interpret sch fieldType1 ~ v1,+ Interpret sch fieldType2 ~ v2,+ Uninterpret v1 ~ fieldType1,+ Uninterpret v2 ~ fieldType2,+ All (UninterpretField sch) '[v1, v2]+ ) =>+ BuildRecord+ sch+ '[ 'FieldDef fieldName1 fieldType1,+ 'FieldDef fieldName2 fieldType2+ ]+ (v1, v2)+ where+ buildR (v1, v2) = Field (toFieldValue v1) :* Field (toFieldValue v2) :* Nil++instance+ ( Interpret sch fieldType1 ~ v1,+ Interpret sch fieldType2 ~ v2,+ Interpret sch fieldType3 ~ v3,+ Uninterpret v1 ~ fieldType1,+ Uninterpret v2 ~ fieldType2,+ Uninterpret v3 ~ fieldType3,+ All (UninterpretField sch) '[v1, v2, v3]+ ) =>+ BuildRecord+ sch+ '[ 'FieldDef fieldName1 fieldType1,+ 'FieldDef fieldName2 fieldType2,+ 'FieldDef fieldName3 fieldType3+ ]+ (v1, v2, v3)+ where+ buildR (v1, v2, v3) =+ Field (toFieldValue v1)+ :* Field (toFieldValue v2)+ :* Field (toFieldValue v3)+ :* Nil++instance+ ( Functor f,+ HasFieldIx (IndexOf fieldName fields) fields fields' fieldType fieldType',+ Interpret sch fieldType ~ fieldValue,+ Interpret sch fieldType' ~ fieldValue',+ Uninterpret fieldValue ~ fieldType,+ Uninterpret fieldValue' ~ fieldType',+ UninterpretField sch fieldValue'+ ) =>+ IsLabel+ fieldName+ ( (fieldValue -> f fieldValue') ->+ (Term sch ('DRecord name fields) -> f (Term sch ('DRecord name fields')))+ )+ where+ fromLabel = field @fieldName++instance+ forall choiceName p f sch name choiceDefs choiceDefs' choiceType choiceType'.+ ( Choice p,+ Applicative f,+ HasChoiceIx (ChoiceIndexOf choiceName choiceDefs) choiceDefs choiceDefs' choiceType choiceType'+ ) =>+ IsLabel+ choiceName+ ( p choiceType (f choiceType') ->+ p (Term sch ('DEnum name choiceDefs)) (f (Term sch ('DEnum name choiceDefs')))+ )+ where+ fromLabel = choose @choiceName++choose ::+ forall (choiceName :: Symbol) sch name choiceDefs choiceDefs' choiceType choiceType'.+ (HasChoiceIx (ChoiceIndexOf choiceName choiceDefs) choiceDefs choiceDefs' choiceType choiceType') =>+ Prism+ (Term sch ('DEnum name choiceDefs))+ (Term sch ('DEnum name choiceDefs'))+ choiceType+ choiceType'+choose = chooseIx @(ChoiceIndexOf choiceName choiceDefs)++class+ HasChoiceIx+ (choiceIndex :: Nat)+ (choiceDefs :: [ChoiceDef Symbol])+ (choiceDefs' :: [ChoiceDef Symbol])+ choiceType+ choiceType'+ | choiceIndex choiceDefs -> choiceType,+ choiceIndex choiceDefs' -> choiceType',+ choiceIndex choiceDefs choiceType' -> choiceDefs',+ choiceIndex choiceDefs' choiceType -> choiceDefs where+ chooseIx ::+ Prism+ (Term sch ('DEnum name choiceDefs))+ (Term sch ('DEnum name' choiceDefs'))+ choiceType+ choiceType'++instance+ HasChoiceIx+ 'Zero+ ('ChoiceDef choiceName ': choiceDefs)+ ('ChoiceDef choiceName ': choiceDefs)+ ()+ ()+ where+ chooseIx f = dimap project (either pure (fmap inject)) (right' f)+ where+ inject :: () -> Term sch ('DEnum name ('ChoiceDef choiceName ': choiceDefs))+ inject () = TEnum (Z (Proxy @('ChoiceDef choiceName)))+ project ::+ Term sch ('DEnum name ('ChoiceDef choiceName ': choiceDefs)) ->+ Either (Term sch ('DEnum name' ('ChoiceDef choiceName' ': choiceDefs))) ()+ project term = case term of+ TEnum (Z Proxy) -> Right ()+ _ -> Left (TEnum (Z Proxy))++instance+ (HasChoiceIx choiceIndex choiceDefs choiceDefs' choiceType choiceType') =>+ HasChoiceIx+ ('Succ choiceIndex)+ (choiceDef ': choiceDefs)+ (choiceDef ': choiceDefs')+ choiceType+ choiceType'+ where+ chooseIx f =+ dimap+ project+ inject+ (right' (chooseIx @choiceIndex @choiceDefs @choiceDefs' f))+ where+ project ::+ Term sch ('DEnum name (choiceDef ': choiceDefs)) ->+ Either () (Term sch ('DEnum name choiceDefs))+ project (TEnum (Z Proxy)) = Left ()+ project (TEnum (S inner)) = Right (TEnum inner)+ inject ::+ Applicative f =>+ Either () (f (Term sch ('DEnum name choiceDefs'))) ->+ f (Term sch ('DEnum name (choiceDef ': choiceDefs')))+ inject (Left ()) = pure (TEnum (Z Proxy))+ inject (Right inner) = fmap wrap inner+ wrap :: Term sch ('DEnum name choiceDefs') -> Term sch ('DEnum name (choiceDef ': choiceDefs'))+ wrap (TEnum choices) = TEnum (S choices)++field ::+ forall fieldName sch name fieldDefs fieldDefs' fieldType fieldType' fieldValue fieldValue'.+ (HasFieldIx (IndexOf fieldName fieldDefs) fieldDefs fieldDefs' fieldType fieldType') =>+ ( HasFieldIx (IndexOf fieldName fieldDefs) fieldDefs fieldDefs' fieldType fieldType',+ Interpret sch fieldType ~ fieldValue,+ Interpret sch fieldType' ~ fieldValue',+ Uninterpret fieldValue ~ fieldType,+ Uninterpret fieldValue' ~ fieldType',+ UninterpretField sch fieldValue'+ ) =>+ Lens+ (Term sch ('DRecord name fieldDefs))+ (Term sch ('DRecord name fieldDefs'))+ fieldValue+ fieldValue'+field = fieldValueName @fieldName . interpretIso++fieldValueName ::+ forall fieldName sch name fieldDefs fieldDefs' fieldType fieldType'.+ (HasFieldIx (IndexOf fieldName fieldDefs) fieldDefs fieldDefs' fieldType fieldType') =>+ Lens+ (Term sch ('DRecord name fieldDefs))+ (Term sch ('DRecord name fieldDefs'))+ (FieldValue sch fieldType)+ (FieldValue sch fieldType')+fieldValueName = fieldValueIx @(IndexOf fieldName fieldDefs)++type family IndexOf (fieldName :: fieldNameKind) (fieldDefs :: [FieldDefB builtin fieldNameKind typeNameKind]) :: Nat where+ IndexOf fieldName ('FieldDef fieldName _ ': _) = 'Zero+ IndexOf fieldName (_ ': fieldDefs) = 'Succ (IndexOf fieldName fieldDefs)+ IndexOf fieldName '[] = TypeError ('Text "does not contain field name " ':<>: 'ShowType fieldName)++type family+ ChoiceIndexOf+ (choiceName :: choiceNameKind)+ (choiceDefs :: [ChoiceDef choiceNameKind]) ::+ Nat where+ ChoiceIndexOf choiceName ('ChoiceDef choiceName : _) = 'Zero+ ChoiceIndexOf choiceName (_ ': choiceDefs) = 'Succ (ChoiceIndexOf choiceName choiceDefs)++class+ HasFieldIx+ (fieldIndex :: Nat)+ (fieldDefs :: [FieldDef Symbol Symbol])+ (fieldDefs' :: [FieldDef Symbol Symbol])+ (fieldType :: FieldType Symbol)+ (fieldType' :: FieldType Symbol)+ | fieldIndex fieldDefs -> fieldType,+ fieldIndex fieldDefs' -> fieldType',+ fieldIndex fieldDefs fieldType' -> fieldDefs',+ fieldIndex fieldDefs' fieldType -> fieldDefs where+ fieldValueIx ::+ Lens+ (Term sch ('DRecord name fieldDefs))+ (Term sch ('DRecord name' fieldDefs'))+ (FieldValue sch fieldType)+ (FieldValue sch fieldType')++instance+ HasFieldIx+ 'Zero+ ('FieldDef fieldName fieldType ': fieldDefs)+ ('FieldDef fieldName fieldType' ': fieldDefs)+ fieldType+ fieldType'+ where+ fieldValueIx f (TRecord (Field fieldValue :* fields)) = TRecord . (:* fields) . Field <$> f fieldValue++instance+ ( HasFieldIx+ fieldIndex+ fieldDefs+ fieldDefs'+ fieldType+ fieldType'+ ) =>+ HasFieldIx ('Succ fieldIndex) (fieldDef ': fieldDefs) (fieldDef ': fieldDefs') fieldType fieldType'+ where+ fieldValueIx f (TRecord (firstField :* restOfFields)) =+ wrap <$> fieldValueIx @fieldIndex f (TRecord restOfFields)+ where+ wrap (TRecord fields) = TRecord (firstField :* fields)++interpretIso ::+ ( Uninterpret (Interpret sch fieldType') ~ fieldType',+ UninterpretField sch (Interpret sch fieldType')+ ) =>+ Iso (FieldValue sch fieldType) (FieldValue sch fieldType') (Interpret sch fieldType) (Interpret sch fieldType')+interpretIso = dimap fromFieldValue (fmap toFieldValue)++type family Interpret (sch :: Schema typeName fieldName) (fieldType :: FieldType typeName) :: Type where+ Interpret _ 'TNull = ()+ Interpret _ ('TPrimitive builtin) = builtin+ Interpret sch ('TSchematic typeName) = Term sch (sch :/: typeName)+ Interpret sch ('TOption innerType) = Maybe (Interpret sch innerType)+ Interpret sch ('TList innerType) = [Interpret sch innerType]+ Interpret sch ('TMap keyType valueType) = Map (Interpret sch keyType) (Interpret sch valueType)+ Interpret sch ('TUnion choiceTypes) = NS Identity (InterpretList sch choiceTypes)++type family InterpretList sch (fieldTypes :: [FieldType typeName]) :: [Type] where+ InterpretList _ '[] = '[]+ InterpretList sch (t ': ts) = (Interpret sch t ': InterpretList sch ts)++fromFieldValue :: FieldValue sch fieldType -> Interpret sch fieldType+fromFieldValue = \case+ FNull -> ()+ (FPrimitive val) -> val+ (FSchematic term) -> term+ (FOption maybeFieldValue) -> fromFieldValue <$> maybeFieldValue+ (FList listFieldValues) -> fromFieldValue <$> listFieldValues+ (FMap mapFieldValues) -> mapKeysMonotonic fromFieldValue (fromFieldValue <$> mapFieldValues)+ (FUnion (Z val)) -> Z (Identity (fromFieldValue val))+ (FUnion (S val)) -> S (fromFieldValue (FUnion val))++class UninterpretField sch a where+ type Uninterpret a :: FieldType typeName+ toFieldValue :: a -> FieldValue sch (Uninterpret a)++instance UninterpretField sch () where+ type Uninterpret () = 'TNull+ toFieldValue () = FNull++instance UninterpretField sch Integer where+ type Uninterpret Integer = 'TPrimitive Integer+ toFieldValue = FPrimitive++instance UninterpretField sch Int32 where+ type Uninterpret Int32 = 'TPrimitive Int32+ toFieldValue = FPrimitive++instance UninterpretField sch Int where+ type Uninterpret Int = 'TPrimitive Int+ toFieldValue = FPrimitive++instance UninterpretField sch T.Text where+ type Uninterpret T.Text = 'TPrimitive T.Text+ toFieldValue = FPrimitive++instance+ ((sch :/: recordName) ~ 'DRecord recordName fieldDefs, sch ~ sch') =>+ UninterpretField sch (Term sch' ('DRecord recordName fieldDefs))+ where+ type Uninterpret (Term sch' ('DRecord recordName fieldDefs)) = 'TSchematic recordName+ toFieldValue = FSchematic++instance+ ((sch :/: enumName) ~ 'DEnum enumName choiceDefs) =>+ UninterpretField sch (Term sch ('DEnum enumName choiceDefs))+ where+ type Uninterpret (Term sch ('DEnum enumName choiceDefs)) = 'TSchematic enumName+ toFieldValue = FSchematic++instance (UninterpretField sch a) => UninterpretField sch (Maybe a) where+ type Uninterpret (Maybe a) = 'TOption (Uninterpret a)+ toFieldValue = FOption . fmap toFieldValue++instance (UninterpretField sch a) => UninterpretField sch [a] where+ type Uninterpret [a] = 'TList (Uninterpret a)+ toFieldValue = FList . fmap toFieldValue++instance+ (Ord (FieldValue sch (Uninterpret k)), UninterpretField sch k, UninterpretField sch v) =>+ UninterpretField sch (Map k v)+ where+ type Uninterpret (Map k v) = 'TMap (Uninterpret k) (Uninterpret v)+ toFieldValue = FMap . mapKeysMonotonic toFieldValue . fmap toFieldValue++instance+ (All (UninterpretField sch) choiceTypes) =>+ UninterpretField sch (NS Identity (choiceTypes :: [Type]))+ where+ type Uninterpret (NS Identity choiceTypes) = 'TUnion (UninterpretList choiceTypes)+ toFieldValue = FUnion . nsToFieldValues++nsToFieldValues ::+ forall sch choiceTypes.+ (All (UninterpretField sch) choiceTypes) =>+ NS Identity choiceTypes ->+ NS (FieldValue sch) (UninterpretList choiceTypes)+nsToFieldValues = \case+ (Z val) -> Z . toFieldValue . runIdentity $ val+ (S val) -> S (nsToFieldValues val)++type family UninterpretList (as :: [Type]) :: [FieldType typeName] where+ UninterpretList '[] = '[]+ UninterpretList (t ': ts) = Uninterpret t ': UninterpretList ts