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module Hsbot.Utils
( addThreadIdToQuitMVar
, delThreadIdFromQuitMVar
, hasAccess
, initTLSEnv
, sendStr
, setGlobalQuitMVar
) where
import Control.Concurrent
import Control.Exception (IOException, catch)
import Control.Monad.Reader
import Control.Monad.State
import qualified Data.ByteString.Lazy.UTF8 as L
import qualified Data.List as L
import qualified Network.IRC as IRC
import Network.TLS
import Prelude hiding (catch)
import System.IO
import Hsbot.Types
-- utility functions
addThreadIdToQuitMVar :: ThreadId -> Env IO ()
addThreadIdToQuitMVar thrId = do
threadIdsMv <- asks envThreadIdsMv
liftIO $ modifyMVar_ threadIdsMv (\l -> return $ thrId:l)
delThreadIdFromQuitMVar :: ThreadId -> Env IO ()
delThreadIdFromQuitMVar thrId = do
threadIdsMv <- asks envThreadIdsMv
liftIO $ modifyMVar_ threadIdsMv (return . L.delete thrId)
setGlobalQuitMVar :: BotStatus -> Env IO ()
setGlobalQuitMVar status = do
quitMv <- asks envQuitMv
liftIO $ putMVar quitMv status
-- Access rights
hasAccess :: Maybe IRC.Prefix -> AccessRight -> Env IO Bool
hasAccess Nothing _ = return False
hasAccess (Just mask) right =
asks envBotState >>= liftIO . readMVar >>= evalStateT (fmap (any accessMatch) (gets botAccess))
where
accessMatch :: AccessList -> Bool
accessMatch (AccessList amask arights)
| mask == amask = (Admin `L.elem` arights) || (right `L.elem` arights)
| otherwise = False
-- Helpers
sendStr :: BotEnv -> Handle -> Maybe (TLSCtx Handle) -> String -> IO ()
sendStr env _ (Just ctx) msg = sendData ctx (L.fromString $ msg ++ "\r\n") `catch` handleIOException env ("sendStr " ++ msg)
sendStr env handle Nothing msg = hPutStrLn handle (msg ++ "\r\n") `catch` handleIOException env ("sendStr " ++ msg)
handleIOException :: BotEnv -> String -> IOException -> IO ()
handleIOException env msg ioException = do
runReaderT (setGlobalQuitMVar $ BotRestart (show ioException, Just msg)) env
myId <- myThreadId
killThread myId
return ()
-- TLS utils
initTLSEnv :: TLSConfig -> IO TLSParams
initTLSEnv ssl = do
let versions = sslVersions ssl
ciphers = sslCiphers ssl
return $ defaultParams { pAllowedVersions = versions
, pCiphers = ciphers }
|
