1 {-# LANGUAGE MultiParamTypeClasses #-}
2 {-# LANGUAGE FlexibleInstances #-}
3 {-# LANGUAGE ScopedTypeVariables #-}
4 {-# LANGUAGE RankNTypes #-}
5 module Language.Haskell.LSP.Test.Parsing where
7 import Control.Applicative
8 import Control.Concurrent.Chan
9 import Control.Concurrent.MVar
10 import Control.Monad.Trans.Class
11 import Control.Monad.Trans.Reader
12 import Control.Monad.Trans.State
14 import qualified Data.ByteString.Lazy.Char8 as B
15 import Data.Conduit hiding (await)
16 import Data.Conduit.Parser
18 import Language.Haskell.LSP.Messages
19 import Language.Haskell.LSP.Types hiding (error)
20 import Language.Haskell.LSP.Test.Compat
21 import Language.Haskell.LSP.Test.Decoding
22 import Language.Haskell.LSP.Test.Messages
25 data SessionContext = SessionContext
29 messageChan :: Chan FromServerMessage,
30 requestMap :: MVar RequestMap,
31 initRsp :: MVar InitializeResponse
34 newtype SessionState = SessionState
39 type ParserStateReader a s r m = ConduitParser a (StateT s (ReaderT r m))
41 -- | A session representing one instance of launching and connecting to a server.
43 -- You can send and receive messages to the server within 'Session' via 'getMessage',
44 -- 'sendRequest' and 'sendNotification'.
47 -- runSession \"path\/to\/root\/dir\" $ do
48 -- docItem <- getDocItem "Desktop/simple.hs" "haskell"
49 -- sendNotification TextDocumentDidOpen (DidOpenTextDocumentParams docItem)
50 -- diagnostics <- getMessage :: Session PublishDiagnosticsNotification
52 type Session = ParserStateReader FromServerMessage SessionState SessionContext IO
54 -- | Matches if the message is a notification.
55 anyNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
56 anyNotification = satisfy isServerNotification
58 notification :: forall m a. (Monad m, FromJSON a) => ConduitParser FromServerMessage m (NotificationMessage ServerMethod a)
60 let parser = decode . encodeMsg :: FromServerMessage -> Maybe (NotificationMessage ServerMethod a)
61 x <- satisfy (isJust . parser)
62 return $ decodeMsg $ encodeMsg x
64 -- | Matches if the message is a request.
65 anyRequest :: Monad m => ConduitParser FromServerMessage m FromServerMessage
66 anyRequest = satisfy isServerRequest
68 request :: forall m a b. (Monad m, FromJSON a, FromJSON b) => ConduitParser FromServerMessage m (RequestMessage ServerMethod a b)
70 let parser = decode . encodeMsg :: FromServerMessage -> Maybe (RequestMessage ServerMethod a b)
71 x <- satisfy (isJust . parser)
72 return $ decodeMsg $ encodeMsg x
74 -- | Matches if the message is a response.
75 anyResponse :: Monad m => ConduitParser FromServerMessage m FromServerMessage
76 anyResponse = satisfy isServerResponse
78 response :: forall m a. (Monad m, FromJSON a) => ConduitParser FromServerMessage m (ResponseMessage a)
80 let parser = decode . encodeMsg :: FromServerMessage -> Maybe (ResponseMessage a)
81 x <- satisfy (isJust . parser)
82 return $ decodeMsg $ encodeMsg x
84 -- | A version of encode that encodes FromServerMessages as if they
86 encodeMsg :: FromServerMessage -> B.ByteString
87 encodeMsg = encode . genericToJSON (defaultOptions { sumEncoding = UntaggedValue })
89 decodeMsg :: FromJSON a => B.ByteString -> a
90 decodeMsg x = fromMaybe (error $ "Unexpected message type\nGot:\n " ++ show x)
93 -- | Matches if the message is a log message notification or a show message notification/request.
94 loggingNotification :: Monad m => ConduitParser FromServerMessage m FromServerMessage
95 loggingNotification = satisfy shouldSkip
97 shouldSkip (NotLogMessage _) = True
98 shouldSkip (NotShowMessage _) = True
99 shouldSkip (ReqShowMessage _) = True
102 publishDiagnosticsNotification :: Monad m => ConduitParser FromServerMessage m PublishDiagnosticsNotification
103 publishDiagnosticsNotification = do
104 NotPublishDiagnostics diags <- satisfy test
106 where test (NotPublishDiagnostics _) = True
109 satisfy :: Monad m => (a -> Bool) -> ConduitParser a m a
116 runSession' :: Chan FromServerMessage -> SessionContext -> SessionState -> Session a -> IO (a, SessionState)
117 runSession' chan context state session = runReaderT (runStateT conduit state) context
118 where conduit = runConduit $ chanSource chan .| runConduitParser session
120 get :: Monad m => ParserStateReader a s r m s
121 get = lift Control.Monad.Trans.State.get
123 put :: Monad m => s -> ParserStateReader a s r m ()
124 put = lift . Control.Monad.Trans.State.put
126 modify :: Monad m => (s -> s) -> ParserStateReader a s r m ()
127 modify = lift . Control.Monad.Trans.State.modify
129 ask :: Monad m => ParserStateReader a s r m r
130 ask = lift $ lift Control.Monad.Trans.Reader.ask