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|
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TemplateHaskell #-}
module Cafp.Game
( PlayerId
, Game (..)
, newGame
, joinGame
, leaveGame
, processClientMessage
, gameViewForPlayer
) where
import Cafp.Messages
import Control.Lens (at, ix, over, (%~), (&), (.~), (^.))
import Control.Lens.TH (makeLenses)
import qualified Data.HashMap.Strict as HMS
import Data.Maybe (fromMaybe)
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)
makeLenses ''Game
newGame :: Game
newGame = Game HMS.empty 1
joinGame :: Game -> (PlayerId, Game)
joinGame game =
let pid = game ^. gameNextPlayerId
name = "Player " <> T.pack (show pid) in
( pid
, game & gameNextPlayerId %~ succ & gamePlayers %~ HMS.insert pid name
)
leaveGame :: PlayerId -> Game -> Game
leaveGame pid = over gamePlayers $ HMS.delete pid
processClientMessage :: PlayerId -> ClientMessage -> Game -> Game
processClientMessage pid msg game = case msg of
ChangeMyName name ->
game & gamePlayers . ix pid .~ name
gameViewForPlayer :: PlayerId -> Game -> GameView
gameViewForPlayer self game =
let opponents = map snd . HMS.toList . HMS.delete self $ game ^. gamePlayers
name = fromMaybe "" $ game ^. gamePlayers . at self in
GameView
{ gameViewOpponents = opponents
, gameViewMyName = name
}
|
