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{-# 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
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