netserver/HWProto.hs
author unc0rr
Thu, 09 Oct 2008 13:45:40 +0000
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child 1329 69ddc231a911
permissions -rw-r--r--
Add support for removing team
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module HWProto where
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import IO
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import Data.List
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import Data.Word
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import Miscutils
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import Maybe
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import qualified Data.Map as Map
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answerBadCmd = [(clientOnly, ["ERROR", "Bad command, state or incorrect parameter"])]
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answerNotMaster = [(clientOnly, ["ERROR", "You cannot configure room parameters"])]
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answerBadParam = [(clientOnly, ["ERROR", "Bad parameter"])]
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answerQuit = [(clientOnly, ["off"])]
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answerAbandoned = [(othersInRoom, ["BYE"])]
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answerQuitInform nick = [(othersInRoom, ["LEFT", nick])]
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answerNickChosen = [(clientOnly, ["ERROR", "The nick already chosen"])]
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answerNickChooseAnother = [(clientOnly, ["WARNING", "Choose another nick"])]
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answerNick nick = [(clientOnly, ["NICK", nick])]
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answerProtocolKnown = [(clientOnly, ["ERROR", "Protocol number already known"])]
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answerBadInput = [(clientOnly, ["ERROR", "Bad input"])]
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answerProto protoNum = [(clientOnly, ["PROTO", show protoNum])]
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answerRoomsList list = [(clientOnly, ["ROOMS"] ++ list)]
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answerRoomExists = [(clientOnly, ["WARNING", "There's already a room with that name"])]
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answerJoined nick = [(sameRoom, ["JOINED", nick])]
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answerNoRoom = [(clientOnly, ["WARNING", "There's no room with that name"])]
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answerWrongPassword = [(clientOnly, ["WARNING", "Wrong password"])]
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answerChatString nick msg = [(othersInRoom, ["CHAT_STRING", nick, msg])]
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answerConfigParam paramName paramStrs = [(othersInRoom, "CONFIG_PARAM" : paramName : paramStrs)]
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answerFullConfig room = map toAnswer (Map.toList $ params room)
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	where
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		toAnswer (paramName, paramStrs) =
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			(clientOnly, "CONFIG_PARAM" : paramName : paramStrs)
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answerCantAdd = [(clientOnly, ["WARNING", "Too many teams or hedgehogs, or same name team"])]
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answerTeamAccepted team = [(clientOnly, ["TEAM_ACCEPTED", teamname team])]
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answerAddTeam team = [(othersInRoom, ["ADD_TEAM", teamname team, teamgrave team, teamfort team, show $ difficulty team] ++ hhsInfo)]
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	where
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		hhsInfo = concatMap (\(HedgehogInfo name hat) -> [name, hat]) $ hedgehogs team
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answerHHNum teamName hhNumber = [(othersInRoom, ["HH_NUM", teamName, show hhNumber])]
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answerRemoveTeam teamName = [(othersInRoom, ["REMOVE_TEAM", teamName])]
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-- Main state-independent cmd handler
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handleCmd :: CmdHandler
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handleCmd client _ rooms ("QUIT":xs) =
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	if null (room client) then
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		(noChangeClients, noChangeRooms, answerQuit)
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	else if isMaster client then
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		(noChangeClients, removeRoom (room client), answerQuit ++ answerAbandoned) -- core disconnects clients on ROOMABANDONED answer
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	else
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		(noChangeClients, noChangeRooms, answerQuit ++ (answerQuitInform $ nick client))
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-- check state and call state-dependent commmand handlers
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handleCmd client clients rooms cmd =
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	if null (nick client) || protocol client == 0 then
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		handleCmd_noInfo client clients rooms cmd
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	else if null (room client) then
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		handleCmd_noRoom client clients rooms cmd
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	else
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		handleCmd_inRoom client clients rooms cmd
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-- 'no info' state - need to get protocol number and nickname
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handleCmd_noInfo :: CmdHandler
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handleCmd_noInfo client clients _ ["NICK", newNick] =
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	if not . null $ nick client then
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		(noChangeClients, noChangeRooms, answerNickChosen)
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	else if haveSameNick then
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		(noChangeClients, noChangeRooms, answerNickChooseAnother)
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	else
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		(modifyClient client{nick = newNick}, noChangeRooms, answerNick newNick)
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	where
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		haveSameNick = isJust $ find (\cl -> newNick == nick cl) clients
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handleCmd_noInfo client _ _ ["PROTO", protoNum] =
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	if protocol client > 0 then
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		(noChangeClients, noChangeRooms, answerProtocolKnown)
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	else if parsedProto == 0 then
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		(noChangeClients, noChangeRooms, answerBadInput)
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	else
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		(modifyClient client{protocol = parsedProto}, noChangeRooms, answerProto parsedProto)
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	where
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		parsedProto = fromMaybe 0 (maybeRead protoNum :: Maybe Word16)
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handleCmd_noInfo _ _ _ _ = (noChangeClients, noChangeRooms, answerBadCmd)
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-- 'noRoom' clients state command handlers
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handleCmd_noRoom :: CmdHandler
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handleCmd_noRoom client _ rooms ["LIST"] =
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		(noChangeClients, noChangeRooms, answerRoomsList $ map name rooms)
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handleCmd_noRoom client _ rooms ["CREATE", newRoom, roomPassword] =
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	if haveSameRoom then
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		(noChangeClients, noChangeRooms, answerRoomExists)
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	else
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		(modifyClient client{room = newRoom, isMaster = True}, addRoom (RoomInfo newRoom roomPassword (protocol client) [] Map.empty), answerJoined $ nick client)
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	where
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		haveSameRoom = isJust $ find (\room -> newRoom == name room) rooms
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handleCmd_noRoom client clients rooms ["CREATE", newRoom] =
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	handleCmd_noRoom client clients rooms ["CREATE", newRoom, ""]
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handleCmd_noRoom client clients rooms ["JOIN", roomName, roomPassword] =
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	if noSuchRoom then
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		(noChangeClients, noChangeRooms, answerNoRoom)
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	else if roomPassword /= password clRoom then
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		(noChangeClients, noChangeRooms, answerWrongPassword)
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	else
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		(modifyClient client{room = roomName}, noChangeRooms, (answerJoined $ nick client) ++ answerNicks ++ answerFullConfig clRoom)
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	where
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		noSuchRoom = isNothing $ find (\room -> roomName == name room) rooms
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		answerNicks = [(clientOnly, ["JOINED"] ++ (map nick $ filter (\ci -> room ci == roomName) clients))]
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		clRoom = roomByName roomName rooms
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handleCmd_noRoom client clients rooms ["JOIN", roomName] =
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	handleCmd_noRoom client clients rooms ["JOIN", roomName, ""]
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handleCmd_noRoom _ _ _ _ = (noChangeClients, noChangeRooms, answerBadCmd)
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-- 'inRoom' clients state command handlers
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handleCmd_inRoom :: CmdHandler
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handleCmd_inRoom client _ _ ["CHAT_STRING", msg] =
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	(noChangeClients, noChangeRooms, answerChatString (nick client) msg)
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handleCmd_inRoom client _ rooms ("CONFIG_PARAM" : paramName : paramStrs) =
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	if isMaster client then
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		(noChangeClients, modifyRoom clRoom{params = Map.insert paramName paramStrs (params clRoom)}, answerConfigParam paramName paramStrs)
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	else
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		(noChangeClients, noChangeRooms, answerNotMaster)
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	where
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		clRoom = roomByName (room client) rooms
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handleCmd_inRoom client _ rooms ("ADD_TEAM" : name : color : grave : fort : difStr : hhsInfo)
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	| length hhsInfo == 16 =
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	if length (teams clRoom) == 6 || canAddNumber <= 0 || isJust findTeam then
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		(noChangeClients, noChangeRooms, answerCantAdd)
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	else
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		(noChangeClients, modifyRoom clRoom{teams = newTeam : teams clRoom}, answerTeamAccepted newTeam ++ answerAddTeam newTeam)
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	where
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		clRoom = roomByName (room client) rooms
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		newTeam = (TeamInfo name color grave fort difficulty newTeamHHNum (hhsList hhsInfo))
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		findTeam = find (\t -> name == teamname t) $ teams clRoom
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		difficulty = fromMaybe 0 (maybeRead difStr :: Maybe Int)
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		hhsList [] = []
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		hhsList (n:h:hhs) = HedgehogInfo n h : hhsList hhs
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		canAddNumber = 18 - (sum . map hhnum $ teams clRoom)
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		newTeamHHNum = min 4 canAddNumber
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handleCmd_inRoom client _ rooms ["HH_NUM", teamName, numberStr] =
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	if not $ isMaster client then
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		(noChangeClients, noChangeRooms, answerNotMaster)
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	else
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		if hhNumber < 1 || hhNumber > 8 || hhNumber > canAddNumber|| noSuchTeam then
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			(noChangeClients, noChangeRooms, answerBadParam)
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		else
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			(noChangeClients, modifyRoom $ modifyTeam clRoom team{hhnum = hhNumber}, answerHHNum teamName hhNumber)
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	where
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		hhNumber = fromMaybe 0 (maybeRead numberStr :: Maybe Int)
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		noSuchTeam = isNothing findTeam
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		team = fromJust findTeam
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		findTeam = find (\t -> teamName == teamname t) $ teams clRoom
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		clRoom = roomByName (room client) rooms
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		canAddNumber = 18 - (sum . map hhnum $ teams clRoom)
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handleCmd_inRoom client _ rooms ["REMOVE_TEAM", teamName] =
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	if not $ isMaster client then
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		(noChangeClients, noChangeRooms, answerNotMaster)
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	else
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		if noSuchTeam then
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			(noChangeClients, noChangeRooms, answerBadParam)
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		else
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			(noChangeClients, modifyRoom clRoom{teams = filter (\t -> teamName /= teamname t) $ teams clRoom}, answerRemoveTeam teamName)
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	where
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		noSuchTeam = isNothing findTeam
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		team = fromJust findTeam
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		findTeam = find (\t -> teamName == teamname t) $ teams clRoom
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		clRoom = roomByName (room client) rooms
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handleCmd_inRoom _ _ _ _ = (noChangeClients, noChangeRooms, answerBadCmd)