where
import Control.Concurrent hiding (yield)
+import Control.Exception
import Control.Lens hiding (List)
import Control.Monad
import Control.Monad.IO.Class
-import Control.Monad.Trans.Class
+import Control.Monad.Except
import Control.Monad.Trans.Reader (ReaderT, runReaderT)
import qualified Control.Monad.Trans.Reader as Reader (ask)
import Control.Monad.Trans.State (StateT, runStateT)
import qualified Control.Monad.Trans.State as State (get, put, modify)
import qualified Data.ByteString.Lazy.Char8 as B
import Data.Aeson
-import Data.Conduit
+import Data.Conduit hiding (await)
import Data.Conduit.Parser
import Data.Default
import Data.Foldable
import Data.List
+import qualified Data.Text as T
import qualified Data.HashMap.Strict as HashMap
import Language.Haskell.LSP.Messages
import Language.Haskell.LSP.TH.ClientCapabilities
import Language.Haskell.LSP.VFS
import Language.Haskell.LSP.Test.Compat
import Language.Haskell.LSP.Test.Decoding
+import Language.Haskell.LSP.Test.Exceptions
import System.Directory
import System.IO
type ParserStateReader a s r m = ConduitParser a (StateT s (ReaderT r m))
-type SessionProcessor = ConduitT FromServerMessage FromServerMessage (StateT SessionState (ReaderT SessionContext IO))
+type SessionProcessor = ConduitM FromServerMessage FromServerMessage (StateT SessionState (ReaderT SessionContext IO))
runSession :: Chan FromServerMessage -> SessionProcessor () -> SessionContext -> SessionState -> Session a -> IO (a, SessionState)
runSession chan preprocessor context state session = runReaderT (runStateT conduit state) context
- where conduit = runConduit $ chanSource chan .| preprocessor .| runConduitParser session
+ where conduit = runConduit $ chanSource chan .| preprocessor .| runConduitParser (catchError session handler)
+ handler e@(Unexpected "ConduitParser.empty") = do
+
+ -- Horrible way to get last item in conduit:
+ -- Add a fake message so we can tell when to stop
+ liftIO $ writeChan chan (RspShutdown (ResponseMessage "EMPTY" IdRspNull Nothing Nothing))
+ x <- peek
+ case x of
+ Just x -> do
+ lastMsg <- skipToEnd x
+ name <- getParserName
+ liftIO $ throw (UnexpectedMessageException (T.unpack name) lastMsg)
+ Nothing -> throw e
+
+ handler e = throw e
+
+ skipToEnd x = do
+ y <- peek
+ case y of
+ Just (RspShutdown (ResponseMessage "EMPTY" IdRspNull Nothing Nothing)) -> return x
+ Just _ -> await >>= skipToEnd
+ Nothing -> return x
get :: Monad m => ParserStateReader a s r m s
get = lift State.get