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@ -10,6 +10,9 @@ dependencies:
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- openapi3
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- deriving-aeson
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- aeson
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- servant
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- lens
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- text
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library:
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source-dirs: src
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default-extensions:
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@ -21,3 +24,6 @@ default-extensions:
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- FlexibleInstances
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- TypeApplications
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- UndecidableInstances
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- TypeFamilies
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- PolyKinds
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- OverloadedStrings
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@ -5,32 +5,60 @@ module Deriving.OpenApi
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DatatypeNameModifier,
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ToSchema,
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module Deriving.Aeson,
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Extending,
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)
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where
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import Control.Lens
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import qualified Data.Aeson.Types as A
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import Data.Kind
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import Data.OpenApi
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import Data.OpenApi.Internal.Schema
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import Data.Proxy
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import Data.Text (Text)
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import qualified Data.Text as T
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import Deriving.Aeson
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import GHC.Generics
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import GHC.TypeLits
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import Servant.API
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type CustomOpenApi = CustomJSON
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instance (OpenApiOptions xs, GToSchema (Rep x), Generic x) => ToSchema (CustomJSON xs x) where
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declareNamedSchema Proxy = genericDeclareNamedSchema (openApiOptions @xs) (Proxy @x)
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declareNamedSchema Proxy =
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openApiSchemaModifier @xs <$> genericDeclareNamedSchema (openApiOptions @xs) (Proxy @x)
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data DatatypeNameModifier t
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instance (StringModifier f, OpenApiOptions xs) => OpenApiOptions (DatatypeNameModifier f ': xs) where
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openApiOptions = (openApiOptions @xs) {datatypeNameModifier = getStringModifier @f}
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instance (AesonOptions xs) => AesonOptions (DatatypeNameModifier f ': xs) where
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aesonOptions = aesonOptions @xs
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instance (AesonOptions xs) => AesonOptions (Description f ': xs) where
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aesonOptions = aesonOptions @xs
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instance (OpenApiOptions xs, KnownSymbol t) => OpenApiOptions (Description t ': xs) where
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openApiOptions = openApiOptions @xs
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openApiSchemaModifier = schema . description <>~ Just (toTextLine @t)
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toTextLine :: forall s. KnownSymbol s => Text
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toTextLine = "\n\n" <> T.pack (symbolVal (Proxy @s))
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type family (++) (x :: [k]) (y :: [k]) :: [k] where
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(++) '[] ys = ys
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(++) (x ': xs) ys = xs ++ (x ': ys)
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type family Extending (c :: * -> *) (ee :: [*]) :: * -> * where
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Extending (CustomJSON a) ee = CustomJSON (a ++ ee)
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-- deriving-aeson-based instances
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class OpenApiOptions (xs :: [Type]) where
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openApiOptions :: SchemaOptions
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openApiSchemaModifier :: NamedSchema -> NamedSchema
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openApiSchemaModifier = id
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instance OpenApiOptions '[] where
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openApiOptions = defaultSchemaOptions
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