affection/examples/example01/Types.hs

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{-# LANGUAGE MultiParamTypeClasses #-}
{-# LANGUAGE TypeFamilies #-}
module Types where
import Affection
import Data.Matrix as M
import NanoVG
import Control.Concurrent.STM
import Control.Monad.IO.Class (liftIO)
data UserData = UserData
{ lifeMat :: Matrix Word
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, foodMat :: Matrix Word
, timeMat :: Matrix Word
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, subsystems :: Subsystems
, nano :: Context
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, lastUpdate :: Int
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}
data Subsystems = Subsystems
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{ subWindow :: Types.Window
, subKeyboard :: Types.Keyboard
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}
newtype Window = Window (TVar [(UUID, WindowMessage -> Affection UserData ())])
newtype Keyboard = Keyboard (TVar [(UUID, KeyboardMessage -> Affection UserData ())])
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instance Participant Types.Window UserData where
type Mesg Types.Window UserData = WindowMessage
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partSubscribers (Window t) = do
subTups <- liftIO $ readTVarIO t
return $ map snd subTups
partSubscribe (Window t) = generalSubscribe t
partUnSubscribe (Window t) = generalUnSubscribe t
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instance SDLSubsystem Types.Window UserData where
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consumeSDLEvents = consumeSDLWindowEvents
instance Participant Keyboard UserData where
type Mesg Keyboard UserData = KeyboardMessage
partSubscribers (Keyboard t) = do
subTups <- liftIO $ readTVarIO t
return $ map snd subTups
partSubscribe (Keyboard t) = generalSubscribe t
partUnSubscribe (Keyboard t) = generalUnSubscribe t
instance SDLSubsystem Keyboard UserData where
consumeSDLEvents = consumeSDLKeyboardEvents
generalSubscribe
:: TVar [(UUID, msg -> Affection UserData ())]
-> (msg -> Affection UserData ())
-> Affection UserData UUID
generalSubscribe t funct = do
uuid <- genUUID
liftIO $ atomically $ modifyTVar' t ((uuid, funct) :)
return uuid
generalUnSubscribe
:: TVar [(UUID, msg -> Affection UserData ())]
-> UUID
-> Affection UserData ()
generalUnSubscribe t uuid =
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liftIO $ atomically $ modifyTVar' t (filter (`filterMsg` uuid))
where
filterMsg :: (UUID, msg -> Affection UserData ()) -> UUID -> Bool
filterMsg (u, _) p = u /= p