module Language.Nomyx.Variables where
import Language.Nomyx.Expression
import Language.Nomyx.Events
import Data.Typeable
import Control.Monad.State
import Data.Maybe
import qualified Data.Map as M
import Data.Map hiding (map, filter, insert, mapMaybe, null)
newVar :: (Typeable a, Show a, Eq a) => VarName -> a -> Nomex (Maybe (V a))
newVar = NewVar
newVar_ :: (Typeable a, Show a, Eq a) => VarName -> a -> Nomex (V a)
newVar_ s a = partial "newVar_: Variable existing" (newVar s a)
readVar :: (Typeable a, Show a, Eq a) => (V a) -> Nomex (Maybe a)
readVar = ReadVar
readVar_ :: forall a. (Typeable a, Show a, Eq a) => (V a) -> Nomex a
readVar_ v@(V a) = partial ("readVar_: Variable \"" ++ a ++ "\" with type \"" ++ (show $ typeOf v) ++ "\" not existing") (readVar v)
writeVar :: (Typeable a, Show a, Eq a) => (V a) -> a -> Nomex Bool
writeVar = WriteVar
writeVar_ :: (Typeable a, Show a, Eq a) => (V a) -> a -> Nomex ()
writeVar_ var val = void $ writeVar var val
modifyVar :: (Typeable a, Show a, Eq a) => (V a) -> (a -> a) -> Nomex ()
modifyVar v f = writeVar_ v . f =<< readVar_ v
delVar :: (V a) -> Nomex Bool
delVar = DelVar
delVar_ :: (V a) -> Nomex ()
delVar_ v = void $ delVar v
data VEvent a = VUpdated a | VDeleted deriving (Typeable, Show, Eq)
data MsgVar a = MsgVar {message :: (Msg (VEvent a)), variable :: (V a) }
msgVar :: String -> MsgVar a
msgVar a = MsgVar (Message a) (V a)
newMsgVar :: (Typeable a, Show a, Eq a) => VarName -> a -> Nomex (Maybe (MsgVar a))
newMsgVar name a = do
mv <- newVar name a
return $ mv >>= Just . MsgVar (Message name)
newMsgVar_ :: (Typeable a, Show a, Eq a) => VarName -> a -> Nomex (MsgVar a)
newMsgVar_ name a = partial "newMsgVar_: Variable existing" (newMsgVar name a)
newMsgVar' :: (Typeable a, Show a, Eq a) => VarName -> a -> (VEvent a -> Nomex()) -> Nomex (Maybe (MsgVar a))
newMsgVar' name a f = do
mv <- newMsgVar name a
case mv of
Just (MsgVar m _) -> do
onMessage m $ f . messageData
return mv
Nothing -> return Nothing
writeMsgVar :: (Typeable a, Show a, Eq a) => MsgVar a -> a -> Nomex Bool
writeMsgVar (MsgVar m v) a = do
r <- writeVar v a
sendMessage m (VUpdated a)
return r
writeMsgVar_ :: (Typeable a, Show a, Eq a) => MsgVar a -> a -> Nomex ()
writeMsgVar_ mv a = void $ writeMsgVar mv a
readMsgVar :: (Typeable a, Show a, Eq a) => MsgVar a -> Nomex (Maybe a)
readMsgVar (MsgVar _ v) = readVar v
readMsgVar_ :: (Typeable a, Show a, Eq a) => MsgVar a -> Nomex a
readMsgVar_ mv = partial "readMsgVar_: variable not existing" (readMsgVar mv)
modifyMsgVar :: (Typeable a, Show a, Eq a) => MsgVar a -> (a -> a) -> Nomex ()
modifyMsgVar mv f = writeMsgVar_ mv . f =<< readMsgVar_ mv
delMsgVar :: (Typeable a, Show a, Eq a) => MsgVar a -> Nomex Bool
delMsgVar (MsgVar m v) = do
sendMessage m VDeleted
delAllEvents m
delVar v
onMsgVarChange :: (Typeable a, Show a, Eq a) => MsgVar a -> (VEvent a -> Nomex()) -> Nomex ()
onMsgVarChange mv f = do
m <- getMsgVarMessage mv
onMessage m $ \(MessageData v) -> f v
onMsgVarEvent :: (Typeable a, Show a, Eq a)
=> MsgVar a
-> (a -> Nomex b)
-> (a -> b -> Nomex())
-> (b -> Nomex())
-> Nomex ()
onMsgVarEvent mv create update delete = do
val <- readMsgVar_ mv
c <- create val
onMsgVarChange mv $ f c where
f c' (VUpdated v) = update v c'
f c' VDeleted = delete c'
getMsgVarMessage :: (Typeable a, Show a, Eq a) => (MsgVar a) -> Nomex (Msg (VEvent a))
getMsgVarMessage (MsgVar m _) = return m
getMsgVarData :: (Typeable a, Show a, Eq a) => (MsgVar a) -> Nomex (Maybe a)
getMsgVarData (MsgVar _ v) = readVar v
getMsgVarData_ :: (Typeable a, Show a, Eq a) => (MsgVar a) -> Nomex a
getMsgVarData_ (MsgVar _ v) = readVar_ v
getMsgVarName :: (Typeable a, Show a, Eq a) => (MsgVar a) -> String
getMsgVarName (MsgVar _ (V varName)) = varName
type ArrayVar i a = MsgVar [(i, Maybe a)]
newArrayVar :: (Typeable a, Show a, Eq a, Typeable i, Show i, Eq i) => VarName -> [i] -> Nomex (Maybe (ArrayVar i a))
newArrayVar name l = do
let list = map (\i -> (i, Nothing)) l
newMsgVar name list
newArrayVar_ :: (Typeable a, Show a, Eq a, Typeable i, Show i, Eq i) => VarName -> [i] -> Nomex (ArrayVar i a)
newArrayVar_ name l = partial "newArrayVar_: Variable existing" (newArrayVar name l)
newArrayVar' :: (Typeable a, Show a, Eq a, Typeable i, Show i, Eq i) => VarName -> [i] -> (VEvent [(i,Maybe a)] -> Nomex ()) -> Nomex (Maybe (ArrayVar i a))
newArrayVar' name l f = do
let list = map (\i -> (i, Nothing)) l
newMsgVar' name list f
newArrayVarOnce :: (Ord i, Typeable a, Show a, Eq a, Typeable i, Show i) => VarName -> [i] -> (VEvent [(i, Maybe a)] -> Nomex ()) -> Nomex (Maybe (ArrayVar i a))
newArrayVarOnce name l f = do
mv <- newArrayVar' name l f
when (isJust mv) $ cleanOnFull $ fromJust mv
return mv
cleanOnFull :: (Typeable a, Show a, Eq a, Ord i, Typeable i, Show i) => (ArrayVar i a) -> Nomex ()
cleanOnFull ar = do
m <- getMsgVarMessage ar
onMessage m $ \_ -> do
full <- (isFullArrayVar_ ar)
when full $ void $ delMsgVar ar
return ()
return ()
isFullArrayVar_ :: (Ord i, Typeable a, Show a, Eq a, Typeable i, Show i) => (ArrayVar i a) -> Nomex Bool
isFullArrayVar_ av = do
md <- getMsgVarData av
return $ and $ map isJust $ map snd $ fromJust md
putArrayVar :: (Ord i, Typeable a, Show a, Eq a, Typeable i, Show i) => (ArrayVar i a) -> i -> a -> Nomex Bool
putArrayVar mv i a = do
ma <- readMsgVar mv
case ma of
Just ar -> do
let ar2 = M.insert i (Just a) (fromList ar)
writeMsgVar mv (toList ar2)
Nothing -> return False
putArrayVar_ :: (Ord i, Typeable a, Show a, Eq a, Typeable i, Show i) => (ArrayVar i a) -> i -> a -> Nomex ()
putArrayVar_ mv i a = void $ putArrayVar mv i a