{-# LANGUAGE AllowAmbiguousTypes #-}
{-# LANGUAGE DeriveAnyClass #-}
{-# LANGUAGE DeriveGeneric #-}
{-# LANGUAGE DeriveLift #-}
{-# LANGUAGE FlexibleContexts #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE ScopedTypeVariables #-}
{-# LANGUAGE TypeApplications #-}
{-# LANGUAGE TypeFamilies #-}
{-# LANGUAGE TypeInType #-}
module Data.Aeson.Schema.Key
( SchemaKey'(..)
, SchemaKeyV
, fromSchemaKeyV
, showSchemaKeyV
, getContext
, toContext
, SchemaKey
, IsSchemaKey(..)
, fromSchemaKey
, showSchemaKey
) where
import qualified Data.Aeson as Aeson
import Data.Hashable (Hashable)
import qualified Data.HashMap.Strict as HashMap
import Data.Proxy (Proxy(..))
import qualified Data.Text as Text
import GHC.Generics (Generic)
import GHC.TypeLits (KnownSymbol, Symbol, symbolVal)
import Language.Haskell.TH.Syntax (Lift)
import Data.Aeson.Schema.Utils.Invariant (unreachable)
data SchemaKey' s
= NormalKey s
| PhantomKey s
deriving (Int -> SchemaKey' s -> ShowS
[SchemaKey' s] -> ShowS
SchemaKey' s -> String
(Int -> SchemaKey' s -> ShowS)
-> (SchemaKey' s -> String)
-> ([SchemaKey' s] -> ShowS)
-> Show (SchemaKey' s)
forall s. Show s => Int -> SchemaKey' s -> ShowS
forall s. Show s => [SchemaKey' s] -> ShowS
forall s. Show s => SchemaKey' s -> String
forall a.
(Int -> a -> ShowS) -> (a -> String) -> ([a] -> ShowS) -> Show a
showList :: [SchemaKey' s] -> ShowS
$cshowList :: forall s. Show s => [SchemaKey' s] -> ShowS
show :: SchemaKey' s -> String
$cshow :: forall s. Show s => SchemaKey' s -> String
showsPrec :: Int -> SchemaKey' s -> ShowS
$cshowsPrec :: forall s. Show s => Int -> SchemaKey' s -> ShowS
Show, SchemaKey' s -> SchemaKey' s -> Bool
(SchemaKey' s -> SchemaKey' s -> Bool)
-> (SchemaKey' s -> SchemaKey' s -> Bool) -> Eq (SchemaKey' s)
forall s. Eq s => SchemaKey' s -> SchemaKey' s -> Bool
forall a. (a -> a -> Bool) -> (a -> a -> Bool) -> Eq a
/= :: SchemaKey' s -> SchemaKey' s -> Bool
$c/= :: forall s. Eq s => SchemaKey' s -> SchemaKey' s -> Bool
== :: SchemaKey' s -> SchemaKey' s -> Bool
$c== :: forall s. Eq s => SchemaKey' s -> SchemaKey' s -> Bool
Eq, (forall x. SchemaKey' s -> Rep (SchemaKey' s) x)
-> (forall x. Rep (SchemaKey' s) x -> SchemaKey' s)
-> Generic (SchemaKey' s)
forall x. Rep (SchemaKey' s) x -> SchemaKey' s
forall x. SchemaKey' s -> Rep (SchemaKey' s) x
forall a.
(forall x. a -> Rep a x) -> (forall x. Rep a x -> a) -> Generic a
forall s x. Rep (SchemaKey' s) x -> SchemaKey' s
forall s x. SchemaKey' s -> Rep (SchemaKey' s) x
$cto :: forall s x. Rep (SchemaKey' s) x -> SchemaKey' s
$cfrom :: forall s x. SchemaKey' s -> Rep (SchemaKey' s) x
Generic, Int -> SchemaKey' s -> Int
SchemaKey' s -> Int
(Int -> SchemaKey' s -> Int)
-> (SchemaKey' s -> Int) -> Hashable (SchemaKey' s)
forall s. Hashable s => Int -> SchemaKey' s -> Int
forall s. Hashable s => SchemaKey' s -> Int
forall a. (Int -> a -> Int) -> (a -> Int) -> Hashable a
hash :: SchemaKey' s -> Int
$chash :: forall s. Hashable s => SchemaKey' s -> Int
hashWithSalt :: Int -> SchemaKey' s -> Int
$chashWithSalt :: forall s. Hashable s => Int -> SchemaKey' s -> Int
Hashable, SchemaKey' s -> Q Exp
SchemaKey' s -> Q (TExp (SchemaKey' s))
(SchemaKey' s -> Q Exp)
-> (SchemaKey' s -> Q (TExp (SchemaKey' s))) -> Lift (SchemaKey' s)
forall s. Lift s => SchemaKey' s -> Q Exp
forall s. Lift s => SchemaKey' s -> Q (TExp (SchemaKey' s))
forall t. (t -> Q Exp) -> (t -> Q (TExp t)) -> Lift t
liftTyped :: SchemaKey' s -> Q (TExp (SchemaKey' s))
$cliftTyped :: forall s. Lift s => SchemaKey' s -> Q (TExp (SchemaKey' s))
lift :: SchemaKey' s -> Q Exp
$clift :: forall s. Lift s => SchemaKey' s -> Q Exp
Lift)
type SchemaKeyV = SchemaKey' String
fromSchemaKeyV :: SchemaKeyV -> String
fromSchemaKeyV :: SchemaKeyV -> String
fromSchemaKeyV (NormalKey String
key) = String
key
fromSchemaKeyV (PhantomKey String
key) = String
key
showSchemaKeyV :: SchemaKeyV -> String
showSchemaKeyV :: SchemaKeyV -> String
showSchemaKeyV (NormalKey String
key) = ShowS
forall a. Show a => a -> String
show String
key
showSchemaKeyV (PhantomKey String
key) = String
"[" String -> ShowS
forall a. [a] -> [a] -> [a]
++ String
key String -> ShowS
forall a. [a] -> [a] -> [a]
++ String
"]"
getContext :: SchemaKeyV -> Aeson.Object -> Aeson.Value
getContext :: SchemaKeyV -> Object -> Value
getContext = \case
NormalKey String
key -> Value -> Text -> Object -> Value
forall k v. (Eq k, Hashable k) => v -> k -> HashMap k v -> v
HashMap.lookupDefault Value
Aeson.Null (String -> Text
Text.pack String
key)
PhantomKey String
_ -> Object -> Value
Aeson.Object
toContext :: SchemaKeyV -> Aeson.Value -> Aeson.Object
toContext :: SchemaKeyV -> Value -> Object
toContext = \case
NormalKey String
key -> Text -> Value -> Object
forall k v. Hashable k => k -> v -> HashMap k v
HashMap.singleton (String -> Text
Text.pack String
key)
PhantomKey String
_ -> \case
Aeson.Object Object
o -> Object
o
Value
Aeson.Null -> Object
forall a. Monoid a => a
mempty
Value
v -> String -> Object
forall a. String -> a
unreachable (String -> Object) -> String -> Object
forall a b. (a -> b) -> a -> b
$ String
"Invalid value for phantom key: " String -> ShowS
forall a. [a] -> [a] -> [a]
++ Value -> String
forall a. Show a => a -> String
show Value
v
type SchemaKey = SchemaKey' Symbol
class KnownSymbol (FromSchemaKey key) => IsSchemaKey (key :: SchemaKey) where
type FromSchemaKey key :: Symbol
toSchemaKeyV :: Proxy key -> SchemaKeyV
instance KnownSymbol key => IsSchemaKey ('NormalKey key) where
type FromSchemaKey ('NormalKey key) = key
toSchemaKeyV :: Proxy ('NormalKey key) -> SchemaKeyV
toSchemaKeyV Proxy ('NormalKey key)
_ = String -> SchemaKeyV
forall s. s -> SchemaKey' s
NormalKey (String -> SchemaKeyV) -> String -> SchemaKeyV
forall a b. (a -> b) -> a -> b
$ Proxy key -> String
forall (n :: Symbol) (proxy :: Symbol -> *).
KnownSymbol n =>
proxy n -> String
symbolVal (Proxy key -> String) -> Proxy key -> String
forall a b. (a -> b) -> a -> b
$ Proxy key
forall k (t :: k). Proxy t
Proxy @key
instance KnownSymbol key => IsSchemaKey ('PhantomKey key) where
type FromSchemaKey ('PhantomKey key) = key
toSchemaKeyV :: Proxy ('PhantomKey key) -> SchemaKeyV
toSchemaKeyV Proxy ('PhantomKey key)
_ = String -> SchemaKeyV
forall s. s -> SchemaKey' s
PhantomKey (String -> SchemaKeyV) -> String -> SchemaKeyV
forall a b. (a -> b) -> a -> b
$ Proxy key -> String
forall (n :: Symbol) (proxy :: Symbol -> *).
KnownSymbol n =>
proxy n -> String
symbolVal (Proxy key -> String) -> Proxy key -> String
forall a b. (a -> b) -> a -> b
$ Proxy key
forall k (t :: k). Proxy t
Proxy @key
fromSchemaKey :: forall key. IsSchemaKey key => String
fromSchemaKey :: String
fromSchemaKey = SchemaKeyV -> String
fromSchemaKeyV (SchemaKeyV -> String) -> SchemaKeyV -> String
forall a b. (a -> b) -> a -> b
$ Proxy key -> SchemaKeyV
forall (key :: SchemaKey).
IsSchemaKey key =>
Proxy key -> SchemaKeyV
toSchemaKeyV (Proxy key -> SchemaKeyV) -> Proxy key -> SchemaKeyV
forall a b. (a -> b) -> a -> b
$ Proxy key
forall k (t :: k). Proxy t
Proxy @key
showSchemaKey :: forall key. IsSchemaKey key => String
showSchemaKey :: String
showSchemaKey = SchemaKeyV -> String
showSchemaKeyV (SchemaKeyV -> String) -> SchemaKeyV -> String
forall a b. (a -> b) -> a -> b
$ Proxy key -> SchemaKeyV
forall (key :: SchemaKey).
IsSchemaKey key =>
Proxy key -> SchemaKeyV
toSchemaKeyV (Proxy key -> SchemaKeyV) -> Proxy key -> SchemaKeyV
forall a b. (a -> b) -> a -> b
$ Proxy key
forall k (t :: k). Proxy t
Proxy @key