Basic syncing

1 files changed, 40 insertions, 0 deletions

diff --git a/server/lib/Cafp/Game.hs b/server/lib/Cafp/Game.hs
new file mode 100644
index 0000000..a5f367a
--- /dev/null
+++ b/server/lib/Cafp/Game.hs
@@ -0,0 +1,40 @@
+{-# LANGUAGE OverloadedStrings #-}
+{-# LANGUAGE RecordWildCards   #-}
+module Cafp.Game
+    ( PlayerId
+    , Game (..)
+
+    , newGame
+    , joinGame
+    , leaveGame
+
+    , gameViewForPlayer
+    ) where
+
+import           Cafp.Messages
+import qualified Data.HashMap.Strict as HMS
+import           Data.Text           (Text)
+import qualified Data.Text           as T
+
+type PlayerId = Int
+
+data Game = Game
+    { gamePlayers      :: !(HMS.HashMap Int Text)
+    , gameNextPlayerId :: !Int
+    } deriving (Show)
+
+newGame :: Game
+newGame = Game HMS.empty 1
+
+joinGame :: Game -> (PlayerId, Game)
+joinGame game@Game {..} =
+    let pid = gameNextPlayerId
+        name = "Player " <> T.pack (show pid)
+        players = HMS.insert pid name gamePlayers in
+    (pid, game {gameNextPlayerId = pid + 1, gamePlayers = players})
+
+leaveGame :: PlayerId -> Game -> Game
+leaveGame pid game = game {gamePlayers = HMS.delete pid $ gamePlayers game}
+
+gameViewForPlayer :: PlayerId -> Game -> GameView
+gameViewForPlayer _ = GameView . map snd . HMS.toList . gamePlayers