Generalize GameState into a concept of game Coordinates, moving the «month» property into it

src/Hanafuda/Message.hs

@@ -7,7 +7,7 @@
 module Hanafuda.Message (
       T(..)
     , FromClient(..)
-    , GameState(..)
+    , Coordinates(..)
     , PrivateState(..)
     , PublicGame(..)
     , PublicPlayer(..)
@@ -140,17 +140,18 @@ instance FromJSON Hanafuda.Flower
 instance ToJSON Hanafuda.Flower where
   toEncoding = genericToEncoding defaultOptions
 
-data GameState = GameState {
+data Coordinates = Coordinates {
       gameID :: GameID
-    , turns :: Int
+    , month :: Hanafuda.Flower
+    , turn :: Int
   } deriving (Eq, Generic, Show)
 
-instance FromJSON GameState
-instance ToJSON GameState where
+instance FromJSON Coordinates
+instance ToJSON Coordinates where
   toEncoding = genericToEncoding defaultOptions
 
 data PrivateState = PrivateState {
-      link :: GameState
+      link :: Coordinates
     , hands :: Map PlayerID Hanafuda.Pack
     , deck :: [Hanafuda.Card]
   } deriving Generic
@@ -169,10 +170,9 @@ instance ToJSON PublicPlayer where
   toEncoding = genericToEncoding defaultOptions
 
 data PublicState = PublicState {
-      gameState :: GameState
+      coordinates :: Coordinates
     , mode :: KoiKoi.Mode
     , scores :: KoiKoi.Scores
-    , month :: Hanafuda.Flower
     , nextPlayer :: KoiKoi.PlayerTurn
     , players :: Map PlayerID PublicPlayer
     , playing :: PlayerID