+anyResponse :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
+anyResponse = named "Any response" $ satisfy isServerResponse
+
+response :: forall m a. (MonadIO m, MonadSessionConfig m, FromJSON a) => ConduitParser FromServerMessage m (ResponseMessage a)
+response = named "Response" $ do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
+ x <- satisfy (isJust . parser)
+ return $ castMsg x
+
+responseForId :: forall m a. (MonadIO m, MonadSessionConfig m, FromJSON a) => LspId -> ConduitParser FromServerMessage m (ResponseMessage a)
+responseForId lid = named "Response for id" $ do
+ let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
+ x <- satisfy (maybe False (\z -> z ^. LSP.id == responseId lid) . parser)
+ return $ castMsg x
+
+anyMessage :: (MonadIO m, MonadSessionConfig m) => ConduitParser FromServerMessage m FromServerMessage
+anyMessage = satisfy (const True)
+
+-- | A stupid method for getting out the inner message.
+castMsg :: FromJSON a => FromServerMessage -> a
+castMsg = fromMaybe (error "Failed casting a message") . decode . encodeMsg
+
+-- | A version of encode that encodes FromServerMessages as if they
+-- weren't wrapped.
+encodeMsg :: FromServerMessage -> B.ByteString
+encodeMsg = encode . genericToJSON (defaultOptions { sumEncoding = UntaggedValue })