diff -r 5be338fa4e2c -r 596b1dcdc1df netserver/HWProto.hs
--- a/netserver/HWProto.hs	Tue Jul 15 16:40:50 2008 +0000
+++ b/netserver/HWProto.hs	Mon Jul 21 09:45:40 2008 +0000
@@ -6,94 +6,85 @@
 import Miscutils
 import Maybe (fromMaybe, fromJust)
 
--- 'noInfo' clients state command handlers
-handleCmd_noInfo :: Handle -> [ClientInfo] -> [RoomInfo] -> [String] -> ([ClientInfo], [RoomInfo], [Handle], [String])
+-- Main state-independent cmd handler
+handleCmd :: CmdHandler
+handleCmd client _ rooms ("QUIT":xs) =
+	if null (room client) then
+		(noChangeClients, noChangeRooms, clientOnly, ["QUIT"])
+	else if isMaster client then
+		(noChangeClients, removeRoom (room client), sameRoom, ["ROOMABANDONED"]) -- core disconnects clients on ROOMABANDONED command
+	else
+		(noChangeClients, noChangeRooms, sameRoom, ["QUIT", nick client])
 
-handleCmd_noInfo clhandle clients rooms ("NICK":newNick:[]) =
+-- check state and call state-dependent commmand handlers
+handleCmd client clients rooms cmd =
+	if null (nick client) || protocol client == 0 then
+		handleCmd_noInfo client clients rooms cmd
+	else if null (room client) then
+		handleCmd_noRoom client clients rooms cmd
+	else
+		handleCmd_inRoom client clients rooms cmd
+
+-- 'no info' state - need to get protocol number and nickname
+handleCmd_noInfo :: CmdHandler
+handleCmd_noInfo client clients _ ["NICK", newNick] =
 	if not . null $ nick client then
-		(clients, rooms, [clhandle], ["ERROR", "The nick already chosen"])
+		(noChangeClients, noChangeRooms, clientOnly, ["ERROR", "The nick already chosen"])
 	else if haveSameNick then
-		(clients, rooms, [clhandle], ["WARNING", "Choose another nick"])
+		(noChangeClients, noChangeRooms, clientOnly, ["WARNING", "Choose another nick"])
 	else
-		(modifyClient clhandle clients (\cl -> cl{nick = newNick}), rooms, [clhandle], ["NICK", newNick])
+		(modifyClient client{nick = newNick}, noChangeRooms, clientOnly, ["NICK", newNick])
 	where
 		haveSameNick = not . null $ filter (\cl -> newNick == nick cl) clients
-		client = clientByHandle clhandle clients
 
-handleCmd_noInfo clhandle clients rooms ("PROTO":protoNum:[]) =
+handleCmd_noInfo client _ _ ["PROTO", protoNum] =
 	if protocol client > 0 then
-		(clients, rooms, [clhandle], ["ERROR", "Protocol number already known"])
+		(noChangeClients, noChangeRooms, clientOnly, ["ERROR", "Protocol number already known"])
 	else if parsedProto == 0 then
-		(clients, rooms, [clhandle], ["ERROR", "Bad input"])
+		(noChangeClients, noChangeRooms, clientOnly, ["ERROR", "Bad input"])
 	else
-		(modifyClient clhandle clients (\cl -> cl{protocol = parsedProto}), rooms, [], [])
+		(modifyClient client{protocol = parsedProto}, noChangeRooms, clientOnly, ["PROTO", show parsedProto])
 	where
 		parsedProto = fromMaybe 0 (maybeRead protoNum :: Maybe Word16)
-		client = clientByHandle clhandle clients
 
-handleCmd_noInfo clhandle clients rooms _ = (clients, rooms, [clhandle], ["ERROR", "Bad command or incorrect parameter"])
-
+handleCmd_noInfo _ _ _ _ = (noChangeClients, noChangeRooms, clientOnly, badCmd)
 
 -- 'noRoom' clients state command handlers
-handleCmd_noRoom :: Handle -> [ClientInfo] -> [RoomInfo] -> [String] -> ([ClientInfo], [RoomInfo], [Handle], [String])
-
-handleCmd_noRoom clhandle clients rooms ("LIST":[]) =
-		(clients, rooms, [clhandle], ["ROOMS"] ++ map (\r -> name r) rooms)
+handleCmd_noRoom :: CmdHandler
+handleCmd_noRoom client _ rooms ["LIST"] =
+		(noChangeClients, noChangeRooms, clientOnly, ["ROOMS"] ++ map name rooms)
 
-handleCmd_noRoom clhandle clients rooms ("CREATE":newRoom:roomPassword:[]) =
+handleCmd_noRoom client _ rooms ["CREATE", newRoom, roomPassword] =
 	if haveSameRoom then
-		(clients, rooms, [clhandle], ["WARNING", "There's already a room with that name"])
+		(noChangeClients, noChangeRooms, clientOnly, ["WARNING", "There's already a room with that name"])
 	else
-		(modifyClient clhandle clients (\cl -> cl{room = newRoom, isMaster = True}), (RoomInfo newRoom roomPassword):rooms, [clhandle], ["JOINS", nick client])
+		(modifyClient client{room = newRoom, isMaster = True}, addRoom (RoomInfo newRoom roomPassword), clientOnly, ["JOINED", nick client])
 	where
 		haveSameRoom = not . null $ filter (\room -> newRoom == name room) rooms
-		client = clientByHandle clhandle clients
 
-handleCmd_noRoom clhandle clients rooms ("CREATE":newRoom:[]) =
-	handleCmd_noRoom clhandle clients rooms ["CREATE", newRoom, ""]
-
-handleCmd_noRoom clhandle clients rooms ("JOIN":roomName:roomPassword:[]) =
+handleCmd_noRoom client clients rooms ["CREATE", newRoom] =
+	handleCmd_noRoom client clients rooms ["CREATE", newRoom, ""]
+	
+handleCmd_noRoom client _ rooms ["JOIN", roomName, roomPassword] =
 	if noSuchRoom then
-		(clients, rooms, [clhandle], ["WARNING", "There's no room with that name"])
+		(noChangeClients, noChangeRooms, clientOnly, ["WARNING", "There's no room with that name"])
 	else if roomPassword /= password (roomByName roomName rooms) then
-		(clients, rooms, [clhandle], ["WARNING", "Wrong password"])
+		(noChangeClients, noChangeRooms, clientOnly, ["WARNING", "Wrong password"])
 	else
-		(modifyClient clhandle clients (\cl -> cl{room = roomName}), rooms, clhandle : (fromRoomHandles roomName clients), ["JOINS", nick client])
+		(modifyClient client{room = roomName}, noChangeRooms, fromRoom roomName, ["JOINED", nick client])
 	where
 		noSuchRoom = null $ filter (\room -> roomName == name room) rooms
-		client = clientByHandle clhandle clients
 
-handleCmd_noRoom clhandle clients rooms ("JOIN":roomName:[]) =
-	handleCmd_noRoom clhandle clients rooms ["JOIN", roomName, ""]
+handleCmd_noRoom client clients rooms ["JOIN", roomName] =
+	handleCmd_noRoom client clients rooms ["JOIN", roomName, ""]
 
-handleCmd_noRoom clhandle clients rooms _ = (clients, rooms, [clhandle], ["ERROR", "Bad command or incorrect parameter"])
+handleCmd_noRoom _ _ _ _ = (noChangeClients, noChangeRooms, clientOnly, badCmd)
 
 -- 'inRoom' clients state command handlers
-handleCmd_inRoom :: Handle -> [ClientInfo] -> [RoomInfo] -> [String] -> ([ClientInfo], [RoomInfo], [Handle], [String])
+handleCmd_inRoom :: CmdHandler
 
-handleCmd_inRoom clhandle clients rooms _ = (clients, rooms, [clhandle], ["ERROR", "Bad command or incorrect parameter"])
-
--- state-independent command handlers
-handleCmd :: Handle -> [ClientInfo] -> [RoomInfo] -> [String] -> ([ClientInfo], [RoomInfo], [Handle], [String])
+handleCmd_inRoom client _ _ ["CHAT_STRING", _, msg] = (noChangeClients, noChangeRooms, othersInRoom, ["CHAT_STRING", nick client, msg])
 
-handleCmd clhandle clients rooms ("QUIT":xs) =
-	if null (room client) then
-		(clients, rooms, [clhandle], ["QUIT"])
-	else if isMaster client then
-		(clients, filter (\rm -> room client /= name rm) rooms, roomMates, ["ROOMABANDONED"]) -- core disconnects clients on ROOMABANDONED command
-	else
-		(clients, rooms, roomMates, ["QUIT", nick client])
-	where
-		client = clientByHandle clhandle clients
-		roomMates = fromRoomHandles (room client) clients
+handleCmd_inRoom client clients rooms ["CONFIG_PARAM", paramName, value] = (noChangeClients, noChangeRooms, othersInRoom, ["CONFIG_PARAM", paramName, value])
 
--- check state and call state-dependent commmand handlers
-handleCmd clhandle clients rooms cmd =
-	if null (nick client) || protocol client == 0 then
-		handleCmd_noInfo clhandle clients rooms cmd
-	else if null (room client) then
-		handleCmd_noRoom clhandle clients rooms cmd
-	else
-		handleCmd_inRoom clhandle clients rooms cmd
-	where
-		client = clientByHandle clhandle clients
+handleCmd_inRoom _ _ _ _ = (noChangeClients, noChangeRooms, clientOnly, badCmd)