43 lines
1008 B
Haskell
43 lines
1008 B
Haskell
{-# LANGUAGE NamedFieldPuns #-}
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module Session (
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State(..)
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, initial
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, store
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) where
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import Config (libDir)
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import Data.Map (Map)
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import qualified Data.Map as Map (empty)
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import Hanafuda.KoiKoi (GameID, PlayerID)
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import qualified Hanafuda.Message as Message (PublicGame)
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import System.Directory (createDirectoryIfMissing, doesFileExist)
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import System.FilePath ((</>))
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data State =
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New
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| Connected {
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playerID :: PlayerID
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, games :: Map GameID Message.PublicGame
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}
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deriving Show
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stateFile :: FilePath
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stateFile = libDir </> "state"
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ifM :: IO Bool -> IO a -> IO a -> IO a
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ifM condition caseTrue caseFalse =
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condition >>= (\b -> if b then caseTrue else caseFalse)
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initial :: IO State
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initial = do
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createDirectoryIfMissing True libDir
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ifM (doesFileExist stateFile)
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(do
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playerID <- read <$> readFile stateFile
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return $ Connected {playerID, games = Map.empty}
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)
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(return New)
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store :: PlayerID -> IO ()
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store = writeFile stateFile . show
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