netserver/Miscutils.hs
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a patch :P
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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(find)
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import Maybe (fromJust)
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import qualified Data.Map as Map
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import Data.Time
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import Data.Sequence(Seq, empty)
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import Network
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import qualified Codec.Binary.Base64 as Base64
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import qualified Codec.Binary.UTF8.String as UTF8
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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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		sendChan :: TChan [String],
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		handle :: Handle,
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		host :: String,
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		connectTime :: UTCTime,
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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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		isReady :: Bool,
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		forceQuit :: Bool,
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		partRoom :: Bool
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	}
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instance Eq ClientInfo where
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	a1 == a2 = handle a1 == handle a2
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data HedgehogInfo =
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	HedgehogInfo String String
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data TeamInfo =
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	TeamInfo
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	{
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		teamowner :: String,
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		teamname :: String,
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		teamcolor :: String,
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		teamgrave :: String,
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		teamfort :: String,
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		teamvoicepack :: String,
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		difficulty :: Int,
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		hhnum :: Int,
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		hedgehogs :: [HedgehogInfo]
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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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		roomProto :: Word16,
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		teams :: [TeamInfo],
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		gamemap :: String,
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		gameinprogress :: Bool,
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		playersIn :: Int,
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		readyPlayers :: Int,
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		isRestrictedJoins :: Bool,
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		isRestrictedTeams :: Bool,
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		roundMsgs :: Seq String,
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		leftTeams :: [String],
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		teamsAtStart :: [TeamInfo],
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		params :: Map.Map String [String]
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	}
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createRoom = (
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	RoomInfo
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		""
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		""
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		0
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		[]
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		"+rnd+"
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		False
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		1
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		0
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		False
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		False
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		Data.Sequence.empty
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		[]
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		[]
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		Map.empty
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	)
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data StatisticsInfo =
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	StatisticsInfo
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	{
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		playersNumber :: Int,
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		roomsNumber :: Int
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	}
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data ServerInfo =
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	ServerInfo
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	{
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		isDedicated :: Bool,
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		serverMessage :: String,
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		adminPassword :: String,
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		listenPort :: PortNumber,
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		loginsNumber :: Int,
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		lastHourUsers :: [UTCTime],
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		stats :: TMVar StatisticsInfo
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	}
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newServerInfo = (
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	ServerInfo
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		True
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		"<h2><p align=center><a href=\"http://www.hedgewars.org/\">http://www.hedgewars.org/</a></p></h2>"
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		""
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		46631
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		0
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		[]
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	)
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type ClientsTransform = [ClientInfo] -> [ClientInfo]
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type RoomsTransform = [RoomInfo] -> [RoomInfo]
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type HandlesSelector = ClientInfo -> [ClientInfo] -> [RoomInfo] -> [ClientInfo]
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type Answer = ServerInfo -> (HandlesSelector, [String])
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type CmdHandler = ClientInfo -> [ClientInfo] -> [RoomInfo] -> [String] -> (ClientsTransform, RoomsTransform, [Answer])
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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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tselect :: [ClientInfo] -> STM ([String], ClientInfo)
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tselect = foldl orElse retry . map (\ci -> (flip (,) 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))
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--clientByHandle :: Handle -> [ClientInfo] -> Maybe ClientInfo
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--clientByHandle chandle clients = find (\c -> handle c == chandle) clients
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sameRoom :: HandlesSelector
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sameRoom client clients rooms = filter (\ci -> room ci == room client) clients
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sameProtoLobbyClients :: HandlesSelector
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sameProtoLobbyClients client clients rooms = filter (\ci -> room ci == [] && protocol ci == protocol client) clients
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otherLobbyClients :: HandlesSelector
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otherLobbyClients client clients rooms = filter (\ci -> room ci == []) clients
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noRoomSameProto :: HandlesSelector
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noRoomSameProto client clients _ = filter (null . room) $ filter (\ci -> protocol client == protocol ci) clients
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othersInRoom :: HandlesSelector
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othersInRoom client clients rooms = filter (client /=) $ filter (\ci -> room ci == room client) clients
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fromRoom :: String -> HandlesSelector
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fromRoom roomName _ clients _ = filter (\ci -> room ci == roomName) clients
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allClients :: HandlesSelector
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allClients _ clients _ = clients
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clientOnly :: HandlesSelector
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clientOnly client _ _ = [client]
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noChangeClients :: ClientsTransform
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noChangeClients a = a
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modifyClient :: ClientInfo -> ClientsTransform
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modifyClient _ [] = error "modifyClient: no such client"
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modifyClient client (cl:cls) =
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	if cl == client then
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		client : cls
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	else
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		cl : (modifyClient client cls)
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modifyRoomClients :: RoomInfo -> (ClientInfo -> ClientInfo) -> ClientsTransform
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modifyRoomClients clientsroom clientMod clients = map (\c -> if name clientsroom == room c then clientMod c else c) clients
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noChangeRooms :: RoomsTransform
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noChangeRooms a = a
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addRoom :: RoomInfo -> RoomsTransform
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addRoom room rooms = room:rooms
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removeRoom :: String -> RoomsTransform
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removeRoom roomname rooms = filter (\rm -> roomname /= name rm) rooms
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modifyRoom :: RoomInfo -> RoomsTransform
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modifyRoom _ [] = error "changeRoomConfig: no such room"
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modifyRoom room (rm:rms) =
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	if name room == name rm then
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		room : rms
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	else
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		rm : modifyRoom room rms
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modifyTeam :: RoomInfo -> TeamInfo -> RoomInfo
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modifyTeam room team = room{teams = replaceTeam team $ teams room}
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	where
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	replaceTeam _ [] = error "modifyTeam: no such team"
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	replaceTeam team (t:teams) =
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		if teamname team == teamname t then
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			team : teams
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		else
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			t : replaceTeam team teams
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proto2ver :: Word16 -> String
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proto2ver 17 = "0.9.7-dev"
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proto2ver 19 = "0.9.7"
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proto2ver 20 = "0.9.8-dev"
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proto2ver 21 = "0.9.8"
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proto2ver 22 = "0.9.9-dev"
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proto2ver 23 = "0.9.9"
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proto2ver 24 = "0.9.10-dev"
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proto2ver _ = "Unknown"
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toEngineMsg :: String -> String
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toEngineMsg msg = Base64.encode (fromIntegral (length msg) : (UTF8.encode msg))