+-- | Matches if the message is a response.
+anyResponse :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+anyResponse = satisfy isServerResponse
+
+response :: forall m a. (Monad m, FromJSON a) => ConduitParser FromServerMessage m (ResponseMessage a)
+response = do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
+ x <- satisfy (isJust . parser)
+ return $ decodeMsg $ encodeMsg x
+
+-- | A version of encode that encodes FromServerMessages as if they
+-- weren't wrapped.
+encodeMsg :: FromServerMessage -> B.ByteString
+encodeMsg = encode . genericToJSON (defaultOptions { sumEncoding = UntaggedValue })
+
+decodeMsg :: FromJSON a => B.ByteString -> a
+decodeMsg x = fromMaybe (error $ "Unexpected message type\nGot:\n " ++ show x)
+ (decode x)
+
+-- | Matches if the message is a log message notification or a show message notification/request.
+loggingNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+loggingNotification = satisfy shouldSkip
+ where
+ shouldSkip (NotLogMessage _) = True
+ shouldSkip (NotShowMessage _) = True
+ shouldSkip (ReqShowMessage _) = True
+ shouldSkip _ = False
+
+publishDiagnosticsNotification :: Monad m => ConduitParser FromServerMessage m PublishDiagnosticsNotification
+publishDiagnosticsNotification = do
+ NotPublishDiagnostics diags <- satisfy test
+ return diags
+ where test (NotPublishDiagnostics _) = True
+ test _ = False
+
+satisfy :: Monad m => (a -> Bool) -> ConduitParser a m a
+satisfy pred = do
+ x <- await
+ if pred x
+ then return x
+ else empty
+
+runSession' :: Chan FromServerMessage -> SessionContext -> SessionState -> Session a -> IO (a, SessionState)
+runSession' chan context state session = runReaderT (runStateT conduit state) context
+ where conduit = runConduit $ chanSource chan .| runConduitParser session
+
+get :: Monad m => ParserStateReader a s r m s
+get = lift Control.Monad.Trans.State.get
+
+put :: Monad m => s -> ParserStateReader a s r m ()
+put = lift . Control.Monad.Trans.State.put
+
+modify :: Monad m => (s -> s) -> ParserStateReader a s r m ()
+modify = lift . Control.Monad.Trans.State.modify
+
+ask :: Monad m => ParserStateReader a s r m r
+ask = lift $ lift Control.Monad.Trans.Reader.ask