gameServer/Utils.hs
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module Utils where
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import Control.Concurrent
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import Control.Concurrent.STM
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import Data.Char
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import Data.Word
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import qualified Data.Map as Map
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import qualified Data.IntMap as IntMap
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import qualified Data.Set as Set
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import Numeric
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import Network.Socket
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import System.IO
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import qualified Data.List as List
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import Maybe
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-------------------------------------------------
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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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import CoreTypes
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sockAddr2String :: SockAddr -> IO String
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sockAddr2String (SockAddrInet _ hostAddr) = inet_ntoa hostAddr
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sockAddr2String (SockAddrInet6 _ _ (a, b, c, d) _) =
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	return $ (foldr1 (.)
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		$ List.intersperse (\a -> ':':a)
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		$ concatMap (\n -> (\(a, b) -> [showHex a, showHex b]) $ divMod n 65536) [a, b, c, d]) []
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toEngineMsg :: String -> String
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toEngineMsg msg = Base64.encode (fromIntegral (length msg) : (UTF8.encode msg))
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fromEngineMsg :: String -> Maybe String
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fromEngineMsg msg = Base64.decode msg >>= return . UTF8.decode >>= removeLength
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	where
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		removeLength (x:xs) = if length xs == ord x then Just xs else Nothing
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		removeLength _ = Nothing
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isLegalNetCommand :: String -> Bool
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isLegalNetCommand msg = test decoded
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	where
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		decoded = fromEngineMsg msg
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		test Nothing = False
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		test (Just (m:ms)) = m `Set.member` legalMessages
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		test _ = False
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		legalMessages = Set.fromList $ "M#+LlRrUuDdZzAaSjJ,sFNpPwtghb12345" ++ slotMessages
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		slotMessages = ['\128', '\129', '\130', '\131', '\132', '\133', '\134', '\135', '\136', '\137', '\138']
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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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teamToNet team = [
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		"ADD_TEAM",
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		teamname team,
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		teamgrave team,
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		teamfort team,
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		teamvoicepack team,
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		teamowner team,
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		show $ difficulty team
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		]
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		++ hhsInfo
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	where
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		hhsInfo = concatMap (\(HedgehogInfo name hat) -> [name, hat]) $ hedgehogs team
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modifyTeam :: TeamInfo -> RoomInfo -> RoomInfo
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modifyTeam team room = 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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illegalName :: String -> Bool
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illegalName str = all isSpace str
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protoNumber2ver :: Word16 -> String
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protoNumber2ver 17 = "0.9.7-dev"
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protoNumber2ver 19 = "0.9.7"
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protoNumber2ver 20 = "0.9.8-dev"
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protoNumber2ver 21 = "0.9.8"
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protoNumber2ver 22 = "0.9.9-dev"
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protoNumber2ver 23 = "0.9.9"
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protoNumber2ver 24 = "0.9.10-dev"
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protoNumber2ver 25 = "0.9.10"
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protoNumber2ver 26 = "0.9.11-dev"
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protoNumber2ver 27 = "0.9.11"
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protoNumber2ver 28 = "0.9.12-dev"
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protoNumber2ver _ = "Unknown"
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askFromConsole :: String -> IO String
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askFromConsole msg = do
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	putStr msg
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	hFlush stdout
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	getLine