netserver/Miscutils.hs
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module Miscutils where
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import IO
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import Control.Concurrent.STM
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import Data.Word
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import Data.Char
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import Data.List
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import Maybe (fromJust)
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data ClientInfo =
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	ClientInfo
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	{
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		chan :: TChan String,
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		handle :: Handle,
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		nick :: String,
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		protocol :: Word16,
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		room :: String,
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		isMaster :: Bool
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	}
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data RoomInfo =
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	RoomInfo
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	{
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		name :: String,
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		password :: String
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	}
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clientByHandle :: Handle -> [ClientInfo] -> ClientInfo
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clientByHandle clhandle clients = fromJust $ find (\ci -> handle ci == clhandle) clients
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roomByName :: String -> [RoomInfo] -> RoomInfo
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roomByName roomName rooms = fromJust $ find (\room -> roomName == name room) rooms
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fromRoomHandles :: String -> [ClientInfo] -> [Handle]
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fromRoomHandles roomName clients = map (\ci -> handle ci) $ filter (\ci -> room ci == roomName) clients
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modifyClient :: Handle -> [ClientInfo] -> (ClientInfo -> ClientInfo) -> [ClientInfo]
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modifyClient clhandle (cl:cls) func =
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	if handle cl == clhandle then
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		(func cl) : cls
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	else
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		cl : (modifyClient clhandle cls func)
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tselect :: [ClientInfo] -> STM (String, Handle)
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tselect = foldl orElse retry . map (\ci -> (flip (,) $ handle ci) `fmap` readTChan (chan ci))
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maybeRead :: Read a => String -> Maybe a
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maybeRead s = case reads s of
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	[(x, rest)] | all isSpace rest -> Just x
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	_         -> Nothing
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deleteBy2t :: (a -> b -> Bool) -> b -> [a] -> [a]
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deleteBy2t _  _ [] = []
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deleteBy2t eq x (y:ys) = if y `eq` x then ys else y : deleteBy2t eq x ys
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deleteFirstsBy2t :: (a -> b -> Bool) -> [a] -> [b] -> [a]
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deleteFirstsBy2t eq =  foldl (flip (deleteBy2t eq))