Allow message types to be infered

[lsp-test.git] / src / Language / Haskell / LSP / Test / Parsing.hs

diff --git a/src/Language/Haskell/LSP/Test/Parsing.hs b/src/Language/Haskell/LSP/Test/Parsing.hs
index fdd01c2a047b7d620ee606334ae96c9805a01ee3..2e829f372284373fa6d5673f9509e140c250387e 100644 (file)
--- a/src/Language/Haskell/LSP/Test/Parsing.hs
+++ b/src/Language/Haskell/LSP/Test/Parsing.hs
@@ -1,21 +1,26 @@
 {-# LANGUAGE MultiParamTypeClasses #-}
 {-# LANGUAGE FlexibleInstances #-}
+{-# LANGUAGE ScopedTypeVariables #-}
+{-# LANGUAGE RankNTypes #-}
 module Language.Haskell.LSP.Test.Parsing where
 
 import Control.Applicative
+import Control.Concurrent.Chan
+import Control.Concurrent.MVar
 import Control.Monad.Trans.Class
 import Control.Monad.IO.Class
 import Control.Monad.Trans.Reader
 import Control.Monad.Trans.State
+import Data.Aeson
+import qualified Data.ByteString.Lazy.Char8 as B
+import Data.Conduit hiding (await)
+import Data.Conduit.Parser
+import Data.Maybe
 import Language.Haskell.LSP.Messages
-import Language.Haskell.LSP.Types hiding (error)
-import Language.Haskell.LSP.Test.Messages
+import Language.Haskell.LSP.Types 
 import Language.Haskell.LSP.Test.Decoding
+import Language.Haskell.LSP.Test.Messages
 import System.IO
-import Control.Concurrent.Chan
-import Control.Concurrent.MVar
-import Data.Conduit hiding (await)
-import Data.Conduit.Parser
 
 data SessionContext = SessionContext
   {
@@ -46,16 +51,39 @@ type ParserStateReader a s r m = ConduitParser a (StateT s (ReaderT r m))
 type Session = ParserStateReader FromServerMessage SessionState SessionContext IO
 
 -- | Matches if the message is a notification.
-notification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
-notification = satisfy isServerNotification
+anyNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+anyNotification = satisfy isServerNotification
+
+notification :: forall m a. (Monad m, FromJSON a) => ConduitParser FromServerMessage m (NotificationMessage ServerMethod a)
+notification = do
+  let parser = decode . encodeMsg :: FromServerMessage -> Maybe (NotificationMessage ServerMethod a)
+  x <- satisfy (isJust . parser)
+  return $ fromJust $ decode $ encodeMsg x
 
 -- | Matches if the message is a request.
-request :: Monad m => ConduitParser FromServerMessage m FromServerMessage
-request = satisfy isServerRequest
+anyRequest :: Monad m => ConduitParser FromServerMessage m FromServerMessage
+anyRequest = satisfy isServerRequest
+
+request :: forall m a b. (Monad m, FromJSON a, FromJSON b) => ConduitParser FromServerMessage m (RequestMessage ServerMethod a b)
+request = do
+  let parser = decode . encodeMsg :: FromServerMessage -> Maybe (RequestMessage ServerMethod a b)
+  x <- satisfy (isJust . parser)
+  return $ fromJust $ decode $ encodeMsg x
 
 -- | Matches if the message is a response.
-response :: Monad m => ConduitParser FromServerMessage m FromServerMessage
-response = satisfy isServerResponse
+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 $ fromJust $ decode $ 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 })
 
 -- | Matches if the message is a log message notification or a show message notification/request.
 loggingNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage