erebos-0.2.2: main/Main.hs
{-# LANGUAGE OverloadedStrings #-}
module Main (main) where
import Control.Concurrent
import Control.Exception
import Control.Monad
import Control.Monad.Except
import Control.Monad.Reader
import Control.Monad.State
import Control.Monad.Trans.Maybe
import Control.Monad.Writer
import Crypto.Random
import Data.Bifunctor
import Data.ByteString.Char8 qualified as BC
import Data.ByteString.Lazy qualified as BL
import Data.Char
import Data.List
import Data.Maybe
import Data.Ord
import Data.Text (Text)
import Data.Text qualified as T
import Data.Text.Encoding qualified as T
import Data.Text.IO qualified as T
import Data.Time.LocalTime
import Data.Typeable
import Network.Socket
import System.Console.GetOpt
import System.Directory
import System.Environment
import System.Exit
import System.IO
import Erebos.Attach
import Erebos.Chatroom
import Erebos.Contact
import Erebos.Conversation
import Erebos.DirectMessage
import Erebos.Discovery
import Erebos.Identity
import Erebos.Invite
import Erebos.Network
import Erebos.Object
import Erebos.PubKey
import Erebos.Service
import Erebos.Set
import Erebos.State
import Erebos.Storable
import Erebos.Storage
import Erebos.Storage.Merge
import Erebos.Sync
import Erebos.TextFormat
import State
import Terminal
import Test
import Version
import WebSocket
data Options = Options
{ optServer :: ServerOptions
, optServices :: [ServiceOption]
, optStorage :: StorageOption
, optCreateIdentity :: Maybe ( Maybe Text, [ Maybe Text ] )
, optChatroomAutoSubscribe :: Maybe Int
, optDmBotEcho :: Maybe Text
, optWebSocketServer :: Maybe Int
, optWebSocketDebugLog :: Bool
, optShowHelp :: Bool
, optShowVersion :: Bool
}
data StorageOption
= DefaultStorage
| FilesystemStorage FilePath
| MemoryStorage
data ServiceOption = ServiceOption
{ soptName :: String
, soptService :: SomeService
, soptEnabled :: Bool
, soptDescription :: String
}
defaultOptions :: Options
defaultOptions = Options
{ optServer = defaultServerOptions
, optServices = availableServices
, optStorage = DefaultStorage
, optCreateIdentity = Nothing
, optChatroomAutoSubscribe = Nothing
, optDmBotEcho = Nothing
, optWebSocketServer = Nothing
, optWebSocketDebugLog = False
, optShowHelp = False
, optShowVersion = False
}
availableServices :: [ServiceOption]
availableServices =
[ ServiceOption "attach" (someService @AttachService Proxy)
True "attach (to) other devices"
, ServiceOption "sync" (someService @SyncService Proxy)
True "synchronization with attached devices"
, ServiceOption "chatroom" (someService @ChatroomService Proxy)
True "chatrooms with multiple participants"
, ServiceOption "contact" (someService @ContactService Proxy)
True "create contacts with network peers"
, ServiceOption "dm" (someService @DirectMessage Proxy)
True "direct messages"
, ServiceOption "discovery" (someService @DiscoveryService Proxy)
True "peer discovery"
, ServiceOption "invite" (someService @InviteService Proxy)
True "invites handling"
]
options :: [ OptDescr (Options -> Writer [ String ] Options) ]
options =
[ Option [ 'p' ] [ "port" ]
(ReqArg (\p -> so $ \opts -> opts { serverPort = read p, serverRetryUnspecifiedPort = False }) "<port>")
"local port to bind"
, Option [ 's' ] [ "silent" ]
(NoArg (so $ \opts -> opts { serverLocalDiscovery = False }))
"do not send announce packets for local discovery"
, Option [] [ "storage" ]
(ReqArg (\path -> \opts -> return opts { optStorage = FilesystemStorage path }) "<path>")
"use storage in <path>"
, Option [] [ "memory-storage" ]
(NoArg (\opts -> return opts { optStorage = MemoryStorage }))
"use memory storage"
, Option [] [ "create-identity" ]
(OptArg (\value -> \opts -> return opts
{ optCreateIdentity =
let devName = T.pack <$> value
in maybe (Just ( devName, [] )) (Just . first (const devName)) (optCreateIdentity opts)
}) "<name>")
"create a new (device) identity in a new local state"
, Option [] [ "create-owner" ]
(OptArg (\value -> \opts -> return opts
{ optCreateIdentity =
let ownerName = T.pack <$> value
in maybe (Just ( Nothing, [ ownerName ] )) (Just . second (ownerName :)) (optCreateIdentity opts)
}) "<name>")
"create owner for a new device identity"
, Option [] [ "chatroom-auto-subscribe" ]
(ReqArg (\count -> \opts -> return opts { optChatroomAutoSubscribe = Just (read count) }) "<count>")
"automatically subscribe for up to <count> chatrooms"
, Option [] [ "discovery-stun-port" ]
(ReqArg (\value -> serviceAttr $ \attrs -> return attrs { discoveryStunPort = Just (read value) }) "<port>")
"offer specified <port> to discovery peers for STUN protocol"
, Option [] [ "discovery-stun-server" ]
(ReqArg (\value -> serviceAttr $ \attrs -> return attrs { discoveryStunServer = Just (read value) }) "<server>")
"offer <server> (domain name or IP address) to discovery peers for STUN protocol"
, Option [] [ "discovery-turn-port" ]
(ReqArg (\value -> serviceAttr $ \attrs -> return attrs { discoveryTurnPort = Just (read value) }) "<port>")
"offer specified <port> to discovery peers for TURN protocol"
, Option [] [ "discovery-turn-server" ]
(ReqArg (\value -> serviceAttr $ \attrs -> return attrs { discoveryTurnServer = Just (read value) }) "<server>")
"offer <server> (domain name or IP address) to discovery peers for TURN protocol"
, Option [] [ "discovery-tunnel" ]
(OptArg (\value -> \opts -> do
fun <- provideTunnelFun value
serviceAttr (\attrs -> return attrs { discoveryProvideTunnel = fun }) opts) "<peer-type>")
"offer to provide tunnel for peers of given <peer-type>, possible values: all, none, websocket"
, Option [] [ "dm-bot-echo" ]
(ReqArg (\prefix -> \opts -> return opts { optDmBotEcho = Just (T.pack prefix) }) "<prefix>")
"automatically reply to direct messages with the same text prefixed with <prefix>"
, Option [] [ "websocket-server" ]
(ReqArg (\value -> \opts -> return opts { optWebSocketServer = Just (read value) }) "<port>")
"start WebSocket server on given port"
, Option [ 'h' ] [ "help" ]
(NoArg $ \opts -> return opts { optShowHelp = True })
"show this help and exit"
, Option [ 'V' ] [ "version" ]
(NoArg $ \opts -> return opts { optShowVersion = True })
"show version and exit"
]
where
so f opts = return opts { optServer = f $ optServer opts }
updateService :: (Service s, Monad m, Typeable m) => (ServiceAttributes s -> m (ServiceAttributes s)) -> SomeService -> m SomeService
updateService f some@(SomeService proxy attrs)
| Just f' <- cast f = SomeService proxy <$> f' attrs
| otherwise = return some
serviceAttr :: (Service s, Monad m, Typeable m) => (ServiceAttributes s -> m (ServiceAttributes s)) -> Options -> m Options
serviceAttr f opts = do
services' <- forM (optServices opts) $ \sopt -> do
service <- updateService f (soptService sopt)
return sopt { soptService = service }
return opts { optServices = services' }
provideTunnelFun :: Maybe String -> Writer [ String ] (Peer -> PeerAddress -> Bool)
provideTunnelFun Nothing = return $ \_ _ -> True
provideTunnelFun (Just "all") = return $ \_ _ -> True
provideTunnelFun (Just "none") = return $ \_ _ -> False
provideTunnelFun (Just "websocket") = return $ \_ -> \case
CustomPeerAddress addr | Just WebSocketAddress {} <- cast addr -> True
_ -> False
provideTunnelFun (Just name) = do
tell [ "Invalid value of --discovery-tunnel: ‘" <> name <> "’\n" ]
return $ \_ _ -> False
debugOptions :: [ OptDescr (Options -> Writer [ String ] Options) ]
debugOptions =
[ Option [] [ "discovery-debug-log" ]
(NoArg (serviceAttr $ \attrs -> return attrs { discoveryDebugLog = True }))
""
, Option [] [ "websocket-debug-log" ]
(NoArg (\opts -> return opts { optWebSocketDebugLog = True }))
""
]
where
updateService :: (Service s, Monad m, Typeable m) => (ServiceAttributes s -> m (ServiceAttributes s)) -> SomeService -> m SomeService
updateService f some@(SomeService proxy attrs)
| Just f' <- cast f = SomeService proxy <$> f' attrs
| otherwise = return some
serviceAttr :: (Service s, Monad m, Typeable m) => (ServiceAttributes s -> m (ServiceAttributes s)) -> Options -> m Options
serviceAttr f opts = do
services' <- forM (optServices opts) $ \sopt -> do
service <- updateService f (soptService sopt)
return sopt { soptService = service }
return opts { optServices = services' }
servicesOptions :: [ OptDescr (Options -> Writer [ String ] Options) ]
servicesOptions = concatMap helper $ "all" : map soptName availableServices
where
helper name =
[ Option [] [ "enable-" <> name ] (NoArg $ so $ change name $ \sopt -> sopt { soptEnabled = True }) ""
, Option [] [ "disable-" <> name ] (NoArg $ so $ change name $ \sopt -> sopt { soptEnabled = False }) ""
]
so f opts = return opts { optServices = f $ optServices opts }
change :: String -> (ServiceOption -> ServiceOption) -> [ServiceOption] -> [ServiceOption]
change name f (s : ss)
| soptName s == name || name == "all"
= f s : change name f ss
| otherwise = s : change name f ss
change _ _ [] = []
getDefaultStorageDir :: IO FilePath
getDefaultStorageDir = do
lookupEnv "EREBOS_DIR" >>= \case
Just dir -> return dir
Nothing -> doesFileExist "./.erebos/erebos-storage" >>= \case
True -> return "./.erebos"
False -> getXdgDirectory XdgData "erebos"
main :: IO ()
main = do
let printErrors errs = do
progName <- getProgName
hPutStrLn stderr $ concat errs <> "Try `" <> progName <> " --help' for more information."
exitFailure
(opts, args) <- (getOpt RequireOrder (options ++ servicesOptions ++ debugOptions) <$> getArgs) >>= \case
(wo, args, []) ->
case runWriter (foldM (flip ($)) defaultOptions wo) of
( o, [] ) -> return ( o, args )
( _, errs ) -> printErrors errs
(_, _, errs) -> printErrors errs
st <- liftIO $ case optStorage opts of
DefaultStorage -> openStorage =<< getDefaultStorageDir
FilesystemStorage path -> openStorage path
MemoryStorage -> memoryStorage
case args of
[ "cat-file", sref ] -> do
readRef st (BC.pack sref) >>= \case
Nothing -> error "ref does not exist"
Just ref -> BL.putStr $ lazyLoadBytes ref
("cat-file" : objtype : srefs@(_:_)) -> do
sequence <$> (mapM (readRef st . BC.pack) srefs) >>= \case
Nothing -> error "ref does not exist"
Just refs -> case objtype of
"signed" -> forM_ refs $ \ref -> do
let signed = load ref :: Signed Object
BL.putStr $ lazyLoadBytes $ storedRef $ signedData signed
forM_ (signedSignature signed) $ \sig -> do
putStr $ "SIG "
BC.putStrLn $ showRef $ storedRef $ sigKey $ fromStored sig
"identity" -> case validateExtendedIdentityF (wrappedLoad <$> refs) of
Just identity -> do
let disp :: Identity m -> IO ()
disp idt = do
maybe (return ()) (T.putStrLn . (T.pack "Name: " `T.append`)) $ idName idt
BC.putStrLn . (BC.pack "KeyId: " `BC.append`) . showRefDigest . refDigest . storedRef $ idKeyIdentity idt
BC.putStrLn . (BC.pack "KeyMsg: " `BC.append`) . showRefDigest . refDigest . storedRef $ idKeyMessage idt
case idOwner idt of
Nothing -> return ()
Just owner -> do
mapM_ (putStrLn . ("OWNER " ++) . BC.unpack . showRefDigest . refDigest . storedRef) $ idExtDataF owner
disp owner
disp identity
Nothing -> putStrLn $ "Identity verification failed"
_ -> error $ "unknown object type '" ++ objtype ++ "'"
[ "show-generation", sref ] -> readRef st (BC.pack sref) >>= \case
Nothing -> error "ref does not exist"
Just ref -> print $ storedGeneration (wrappedLoad ref :: Stored Object)
[ "identity" ] -> do
loadHeads st >>= \case
(h : _) -> do
T.putStr $ showIdentityDetails $ headLocalIdentity h
[] -> do
T.putStrLn "no local state head"
exitFailure
[ "update-identity" ] -> do
withTerminal noCompletion $ \term -> do
either (fail . showErebosError) return <=< runExceptT $ do
runReaderT (updateSharedIdentity term) =<< runReaderT (loadLocalStateHead term) st
("update-identity" : srefs) -> do
withTerminal noCompletion $ \term -> do
sequence <$> mapM (readRef st . BC.pack) srefs >>= \case
Nothing -> error "ref does not exist"
Just refs
| Just idt <- validateIdentityF $ map wrappedLoad refs -> do
BC.putStrLn . showRefDigest . refDigest . storedRef . idData =<<
(either (fail . showErebosError) return <=< runExceptT $ runReaderT (interactiveIdentityUpdate term idt) st)
| otherwise -> error "invalid identity"
[ "test" ] -> runTestTool st
[] -> do
let header = "Usage: erebos [OPTION...]"
serviceDesc ServiceOption {..} = padService (" " <> soptName) <> soptDescription
padTo n str = str <> replicate (n - length str) ' '
padOpt = padTo 37
padService = padTo 16
if | optShowHelp opts -> putStr $ usageInfo header options <> unlines
(
[ padOpt " --enable-<service>" <> "enable network service <service>"
, padOpt " --disable-<service>" <> "disable network service <service>"
, padOpt " --enable-all" <> "enable all network services"
, padOpt " --disable-all" <> "disable all network services"
, ""
, "Available network services:"
] ++ map serviceDesc availableServices
)
| optShowVersion opts -> putStrLn versionLine
| otherwise -> interactiveLoop st opts
(cmdname : _) -> do
hPutStrLn stderr $ "Unknown command ‘" <> cmdname <> "’"
exitFailure
interactiveLoop :: Storage -> Options -> IO ()
interactiveLoop st opts = withTerminal commandCompletion $ \term -> do
showPrompt term
erebosHead <- either (fail . showErebosError) return <=< runExceptT . flip runReaderT st $ do
case optCreateIdentity opts of
Nothing -> loadLocalStateHead term
Just ( devName, names ) -> createLocalStateHead (names ++ [ devName ])
void $ printLine term $ plainText $ displayIdentity $ headLocalIdentity erebosHead
let tui = hasTerminalUI term
let extPrintLn = void . printLine term
let getInputLinesTui :: Either CommandState String -> MaybeT IO String
getInputLinesTui eprompt = do
prompt <- case eprompt of
Left cstate -> do
pname <- case csContext cstate of
NoContext -> return ""
SelectedPeer peer -> getPeerIdentity peer >>= return . \case
PeerIdentityFull pid -> maybe "<unnamed>" T.unpack $ idName $ finalOwner pid
PeerIdentityRef wref _ -> "<" ++ BC.unpack (showRefDigest $ wrDigest wref) ++ ">"
PeerIdentityUnknown _ -> "<unknown>"
SelectedContact contact -> return $ T.unpack $ contactName contact
SelectedChatroom rstate -> return $ T.unpack $ fromMaybe (T.pack "<unnamed>") $ roomName =<< roomStateRoom rstate
SelectedConversation conv -> return $ T.unpack $ conversationName conv
return $ pname ++ "> "
Right prompt -> return prompt
lift $ setPrompt term $ plainText $ T.pack prompt
join $ lift $ getInputLine term $ \case
Just input@('/' : _)
| "/seen" : _ <- words input -> ErasePrompt $ return input
| otherwise -> KeepPrompt $ return input
Just input -> ErasePrompt $ case reverse input of
_ | all isSpace input -> getInputLinesTui eprompt
'\\':rest -> (reverse ('\n':rest) ++) <$> getInputLinesTui (Right ">> ")
_ -> return input
Nothing
| tui -> KeepPrompt mzero
| otherwise -> KeepPrompt $ liftIO $ forever $ threadDelay 100000000
getInputCommandTui cstate = do
let parseCommand cmdline =
case dropWhile isSpace <$> span (\c -> isAlphaNum c || c == '-') cmdline of
( scmd, args )
| not (null scmd) && all isDigit scmd
-> ( cmdSelectContext, scmd )
| otherwise
-> ( fromMaybe (cmdUnknown scmd) $ lookup scmd commands, args )
( CommandM cmd, line ) <- getInputLinesTui cstate >>= return . \case
'/' : input -> parseCommand input
input | not tui -> parseCommand input
input -> ( cmdSend, input )
return ( cmd, line )
let getInputCommand = getInputCommandTui . Left
contextVar <- liftIO $ newMVar NoContext
currentLinesVar <- liftIO $ newMVar []
_ <- liftIO $ do
tzone <- getCurrentTimeZone
let self = finalOwner $ headLocalIdentity erebosHead
watchDirectMessageThreads erebosHead $ \prev cur -> holdFlush term $ do
let ( remove, messages ) = dmThreadToListChange prev cur
when (remove > 0) $ do
modifyMVar_ currentLinesVar $ \clines -> if
| l : ls <- drop (remove - 1) clines -> do
eraseLinesSince l
return ls
| _ : _ <- clines -> do
eraseLinesSince (last clines)
return []
| otherwise -> do
return []
forM_ (reverse messages) $ \( msg, new ) -> do
withMVar contextVar $ \ctx -> do
mbpid <- case ctx of
SelectedPeer peer -> getPeerIdentity peer >>= return . \case
PeerIdentityFull pid -> Just $ finalOwner pid
_ -> Nothing
SelectedContact contact
| Just cid <- contactIdentity contact -> return (Just cid)
SelectedConversation conv -> return $ conversationPeer conv
_ -> return Nothing
when (not tui || maybe False (msgPeer cur `sameIdentity`) mbpid) $ do
line <- printLine term $ formatMessageLine tzone $ makeMessage new msg
modifyMVar_ currentLinesVar $ return . (line :)
case optDmBotEcho opts of
Just prefix
| not (msgFrom msg `sameIdentity` self)
-> do
void $ forkIO $ do
res <- runExceptT $ flip runReaderT erebosHead $ sendDirectMessage (msgFrom msg) (prefix <> msgText msg)
case res of
Right _ -> return ()
Left err -> extPrintLn $ "Failed to send dm echo: " <> err
_ -> return ()
withMVar contextVar $ \ctx -> do
updatePromptStatus term erebosHead . either (const Nothing) Just =<<
(runExceptT $ flip runReaderT erebosHead $ getConversationFromContext ctx)
updatePromptStatus term erebosHead Nothing
peers <- liftIO $ newMVar []
contextOptions <- liftIO $ newMVar ( Nothing, [] )
chatroomSetVar <- liftIO $ newEmptyMVar
let autoSubscribe = optChatroomAutoSubscribe opts
chatroomList = fromSetBy (comparing roomStateData) . lookupSharedValue . lsShared . headObject $ erebosHead
watched <- if isJust autoSubscribe || any roomStateSubscribe chatroomList
then do
fmap Just $ liftIO $ watchChatroomsForCli tui extPrintLn erebosHead
chatroomSetVar contextVar contextOptions autoSubscribe
else do
return Nothing
server <- liftIO $ do
startServer (optServer opts) erebosHead (extPrintLn . plainText . T.pack) $
map soptService $ filter soptEnabled $ optServices opts
case optWebSocketServer opts of
Just port -> startWebsocketServer server (extPrintLn . plainText . T.pack) defaultWebSocketOptions
{ wsPort = port
, wsDebugLog = optWebSocketDebugLog opts
}
Nothing -> return ()
void $ liftIO $ forkIO $ void $ forever $ do
peer <- getNextPeerChange server
getPeerIdentity peer >>= \case
pid@(PeerIdentityFull _) -> do
dropped <- isPeerDropped peer
shown <- showPeer pid <$> getPeerAddress peer
let update [] = ( [ ( peer, shown ) ], ( Nothing, optionLabelNew ) )
update ((p,s):ps)
| p == peer && dropped = ( ps, ( Nothing, optionLabelDel ) )
| p == peer = ( ( peer, shown ) : ps, ( Just s, optionLabelUpd ) )
| otherwise = first ((p,s):) $ update ps
let ctxUpdate n [] = ([SelectedPeer peer], n)
ctxUpdate n (ctx:ctxs)
| SelectedPeer p <- ctx, p == peer = (ctx:ctxs, n)
| otherwise = first (ctx:) $ ctxUpdate (n + 1) ctxs
( op, updateType ) <- modifyMVar peers (return . update)
let updateType' = if dropped then optionLabelDel else updateType
modifyMVar_ contextOptions $ \case
( watch, clist )
| watch == Just WatchPeers || not tui
-> do
let ( clist', idx ) = ctxUpdate (1 :: Int) clist
when (Just shown /= op) $ do
extPrintLn $ formatSelectOption idx $ "PEER " <> updateType' <> " " <> plainText shown
return ( Just WatchPeers, clist' )
cur -> return cur
_ -> return ()
let process :: CommandState -> MaybeT IO CommandState
process cstate = do
(cmd, line) <- getInputCommand cstate
h <- liftIO (reloadHead $ csHead cstate) >>= \case
Just h -> return h
Nothing -> do lift $ extPrintLn "current head deleted"
mzero
res <- liftIO $ modifyMVar contextVar $ \ctx -> do
res <- runExceptT $ flip execStateT cstate { csHead = h, csContext = ctx } $ runReaderT cmd CommandInput
{ ciServer = server
, ciTerminal = term
, ciLine = line
, ciPrint = extPrintLn
, ciOptions = opts
, ciPeers = liftIO $ modifyMVar peers $ \ps -> do
ps' <- filterM (fmap not . isPeerDropped . fst) ps
return (ps', ps')
, ciContextOptions = liftIO $ snd <$> readMVar contextOptions
, ciSetContextOptions = \watch ctxs -> liftIO $ modifyMVar_ contextOptions $ const $ return ( Just watch, ctxs )
, ciContextVar = contextVar
, ciContextOptionsVar = contextOptions
, ciCurrentLinesVar = currentLinesVar
, ciChatroomSetVar = chatroomSetVar
}
return ( either (const ctx) csContext res, res )
case res of
Right cstate'
| csQuit cstate' -> mzero
| otherwise -> return cstate'
Left err -> do
lift $ extPrintLn $ withStyle (setForegroundColor BrightRed noStyle) $ plainText $ T.pack $ "Error: " ++ showErebosError err
return cstate
let loop (Just cstate) = runMaybeT (process cstate) >>= loop
loop Nothing = return ()
loop $ Just $ CommandState
{ csHead = erebosHead
, csContext = NoContext
, csWatchChatrooms = watched
, csQuit = False
}
hidePrompt term
contextIndexStyle :: TextStyle
contextIndexStyle = setForegroundColor BrightCyan noStyle
printSelectOption :: Int -> FormattedText -> CommandM ()
printSelectOption i label = cmdPutStrLn $ formatSelectOption i label
formatSelectOption :: Int -> FormattedText -> FormattedText
formatSelectOption i label = "[" <> withStyle contextIndexStyle (plainText $ T.pack $ show i) <> "] " <> label
optionLabelNew, optionLabelUpd, optionLabelDel :: FormattedText
optionLabelNew = withStyle (setForegroundColor Green noStyle) $ plainText "NEW"
optionLabelUpd = withStyle (setForegroundColor Yellow noStyle) $ plainText "UPD"
optionLabelDel = withStyle (setForegroundColor Red noStyle) $ plainText "DEL"
data CommandInput = CommandInput
{ ciServer :: Server
, ciTerminal :: Terminal
, ciLine :: String
, ciPrint :: FormattedText -> IO ()
, ciOptions :: Options
, ciPeers :: CommandM [ ( Peer, Text ) ]
, ciContextOptions :: CommandM [ CommandContext ]
, ciSetContextOptions :: ContextWatchOptions -> [ CommandContext ] -> Command
, ciContextVar :: MVar CommandContext
, ciContextOptionsVar :: MVar ( Maybe ContextWatchOptions, [ CommandContext ] )
, ciCurrentLinesVar :: MVar [ TerminalLine ]
, ciChatroomSetVar :: MVar (Set ChatroomState)
}
data CommandState = CommandState
{ csHead :: Head LocalState
, csContext :: CommandContext
, csWatchChatrooms :: Maybe WatchedHead
, csQuit :: Bool
}
data CommandContext
= NoContext
| SelectedPeer Peer
| SelectedContact Contact
| SelectedChatroom ChatroomState
| SelectedConversation Conversation
data ContextWatchOptions
= WatchPeers
| WatchContacts
| WatchChatrooms
| WatchConversations
deriving (Eq)
newtype CommandM a = CommandM (ReaderT CommandInput (StateT CommandState (ExceptT ErebosError IO)) a)
deriving (Functor, Applicative, Monad, MonadReader CommandInput, MonadState CommandState, MonadError ErebosError)
instance MonadFail CommandM where
fail = throwOtherError
instance MonadIO CommandM where
liftIO act = CommandM (liftIO (try act)) >>= \case
Left (e :: SomeException) -> throwOtherError (show e)
Right x -> return x
instance MonadRandom CommandM where
getRandomBytes = liftIO . getRandomBytes
instance MonadStorage CommandM where
getStorage = gets $ headStorage . csHead
instance MonadHead LocalState CommandM where
updateLocalHead f = do
h <- gets csHead
(Just h', x) <- maybe (fail "failed to reload head") (flip updateHead f) =<< reloadHead h
modify $ \s -> s { csHead = h' }
return x
type Command = CommandM ()
getSelectedPeer :: CommandM Peer
getSelectedPeer = gets csContext >>= \case
SelectedPeer peer -> return peer
_ -> throwOtherError "no peer selected"
getSelectedChatroom :: CommandM ChatroomState
getSelectedChatroom = gets csContext >>= \case
SelectedChatroom rstate -> return rstate
_ -> throwOtherError "no chatroom selected"
getSelectedConversation :: CommandM Conversation
getSelectedConversation = gets csContext >>= getConversationFromContext
getConversationFromContext
:: (MonadIO m, MonadError ErebosError m, MonadHead LocalState m)
=> CommandContext -> m Conversation
getConversationFromContext = \case
SelectedPeer peer -> getPeerIdentity peer >>= \case
PeerIdentityFull pid -> directMessageConversation $ finalOwner pid
_ -> throwOtherError "incomplete peer identity"
SelectedContact contact -> case contactIdentity contact of
Just cid -> directMessageConversation cid
Nothing -> throwOtherError "contact without erebos identity"
SelectedChatroom rstate ->
chatroomConversation rstate >>= \case
Just conv -> return conv
Nothing -> throwOtherError "invalid chatroom"
SelectedConversation conv -> reloadConversation conv
_ -> throwOtherError "no contact, peer or conversation selected"
getSelectedOrManualContext :: CommandM CommandContext
getSelectedOrManualContext = do
asks ciLine >>= \case
"" -> gets csContext
str | all isDigit str -> getContextByIndex id (read str)
_ -> throwOtherError "invalid index"
updatePromptStatus :: Terminal -> Head LocalState -> Maybe Conversation -> IO ()
updatePromptStatus term h current = do
conversations <- mapMaybe checkNew <$> flip runReaderT h lookupConversations
setPromptStatus term $ withStyle (setForegroundColor BrightYellow noStyle) $ formatStatus (length conversations) <> " "
where
checkNew conv
| (msg : _) <- conversationHistory conv
, messageUnread msg
, maybe True (not . isSameConversation conv) current
= Just ( conv, msg )
checkNew _ = Nothing
formatStatus 0 = withStyle (setForegroundColor BrightBlack noStyle) "--"
formatStatus 1 = withStyle (setForegroundColor BrightYellow noStyle) " *"
formatStatus n
| n < 10 = withStyle (setForegroundColor BrightYellow noStyle) $ plainText $ T.pack (show n) <> "*"
| otherwise = withStyle (setForegroundColor BrightYellow noStyle) $ plainText $ "X*"
commands :: [(String, Command)]
commands =
[ ( "history", cmdHistory )
, ( "identity", cmdIdentity )
, ( "peers", cmdPeers )
, ( "peer-add", cmdPeerAdd )
, ( "peer-add-public", cmdPeerAddPublic )
, ( "peer-drop", cmdPeerDrop )
, ( "send", cmdSend )
, ( "delete", cmdDelete )
, ( "update-identity", cmdUpdateIdentity )
, ( "attach", cmdAttach )
, ( "attach-accept", cmdAttachAccept )
, ( "attach-reject", cmdAttachReject )
, ( "chatrooms", cmdChatrooms )
, ( "chatroom-create-public", cmdChatroomCreatePublic )
, ( "contacts", cmdContacts )
, ( "contact-add", cmdContactAdd )
, ( "contact-accept", cmdContactAccept )
, ( "contact-reject", cmdContactReject )
, ( "invite-contact", cmdInviteContact )
, ( "invite-accept", cmdInviteAccept )
, ( "conversations", cmdConversations )
, ( "new", cmdNew )
, ( "seen", cmdSeen )
, ( "details", cmdDetails )
, ( "discovery", cmdDiscovery )
, ( "join", cmdJoin )
, ( "join-as", cmdJoinAs )
, ( "leave", cmdLeave )
, ( "members", cmdMembers )
, ( "select", cmdSelectContext )
, ( "quit", cmdQuit )
]
commandCompletion :: CompletionFunc IO
commandCompletion = completeWordWithPrev Nothing [ ' ', '\t', '\n', '\r' ] $ curry $ \case
([], '/':pref) -> return . map (simpleCompletion . ('/':)) . filter (pref `isPrefixOf`) $ sortedCommandNames
_ -> return []
where
sortedCommandNames = sort $ map fst commands
cmdPutStrLn :: FormattedText -> Command
cmdPutStrLn str = do
term <- asks ciTerminal
void $ liftIO $ printLine term str
formatMessageLine :: TimeZone -> Message -> FormattedText
formatMessageLine tzone msg = mconcat
[ formatMessageStatus msg
, formatMessageFT tzone msg
]
formatMessageStatus :: Message -> FormattedText
formatMessageStatus msg
| messageUnread msg = withStyle (setForegroundColor BrightYellow noStyle) $ plainText " * "
| otherwise = plainText " "
cmdUnknown :: String -> Command
cmdUnknown cmd = cmdPutStrLn $ withStyle (setForegroundColor BrightRed noStyle) $ plainText $ "Unknown command: ‘" <> T.pack cmd <> "’"
cmdPeers :: Command
cmdPeers = do
peers <- join $ asks ciPeers
set <- asks ciSetContextOptions
set WatchPeers $ map (SelectedPeer . fst) peers
forM_ (zip [1..] peers) $ \(i :: Int, (_, name)) -> do
printSelectOption i $ plainText name
cmdPeerAdd :: Command
cmdPeerAdd = void $ do
server <- asks ciServer
(hostname, port) <- (words <$> asks ciLine) >>= \case
hostname:p:_ -> return (hostname, p)
[hostname] -> return (hostname, show discoveryPort)
[] -> throwOtherError "missing peer address"
addr:_ <- liftIO $ getAddrInfo (Just $ defaultHints { addrSocketType = Datagram }) (Just hostname) (Just port)
contextOptsVar <- asks ciContextOptionsVar
liftIO $ modifyMVar_ contextOptsVar $ return . first (const $ Just WatchPeers)
liftIO $ serverPeer server (addrAddress addr)
cmdPeerAddPublic :: Command
cmdPeerAddPublic = do
server <- asks ciServer
contextOptsVar <- asks ciContextOptionsVar
liftIO $ modifyMVar_ contextOptsVar $ return . first (const $ Just WatchPeers)
liftIO $ mapM_ (serverPeer server . addrAddress) =<< gather 'a'
where
gather c
| c <= 'z' = do
let hints = Just $ defaultHints { addrSocketType = Datagram }
hostname = Just $ c : ".discovery.erebosprotocol.net"
service = Just $ show discoveryPort
handle (\(_ :: IOException) -> return []) (getAddrInfo hints hostname service) >>= \case
addr : _ -> (addr :) <$> gather (succ c)
[] -> return []
| otherwise = do
return []
cmdPeerDrop :: Command
cmdPeerDrop = do
dropPeer =<< getSelectedPeer
modify $ \s -> s { csContext = NoContext }
showPeer :: PeerIdentity -> PeerAddress -> Text
showPeer pidentity paddr =
let name = case pidentity of
PeerIdentityUnknown _ -> "<noid>"
PeerIdentityRef wref _ -> "<" <> T.decodeUtf8 (showRefDigest $ wrDigest wref) <> ">"
PeerIdentityFull pid -> displayIdentity pid
in name <> " [" <> T.pack (show paddr) <> "]"
cmdJoin :: Command
cmdJoin = joinChatroom =<< getSelectedChatroom
cmdJoinAs :: Command
cmdJoinAs = do
name <- asks ciLine
identity <- createIdentity (Just $ T.pack name) Nothing
joinChatroomAs identity =<< getSelectedChatroom
cmdLeave :: Command
cmdLeave = leaveChatroom =<< getSelectedChatroom
cmdMembers :: Command
cmdMembers = do
Just room <- findChatroomByStateData . head . roomStateData =<< getSelectedChatroom
forM_ (chatroomMembers room) $ \x -> do
cmdPutStrLn $ plainText $ fromMaybe "<unnamed>" $ idName x
getContextByIndex :: (Maybe ContextWatchOptions -> Maybe ContextWatchOptions) -> Int -> CommandM CommandContext
getContextByIndex f n = do
contextOptsVar <- asks ciContextOptionsVar
join $ liftIO $ modifyMVar contextOptsVar $ \cur@( watch, ctxs ) -> if
| n > 0, (ctx : _) <- drop (n - 1) ctxs
-> return ( ( f watch, ctxs ), return ctx )
| otherwise
-> return ( cur, throwOtherError "invalid index" )
cmdSelectContext :: Command
cmdSelectContext = do
n <- read <$> asks ciLine
ctx <- getContextByIndex (const Nothing) n
modify $ \s -> s { csContext = ctx }
case ctx of
SelectedChatroom rstate -> do
when (not (roomStateSubscribe rstate)) $ do
chatroomSetSubscribe (head $ roomStateData rstate) True
_ -> return ()
term <- asks ciTerminal
h <- gets csHead
(runExceptT $ flip runReaderT h $ getConversationFromContext ctx) >>= \case
Right conv -> do
liftIO $ updatePromptStatus term h (Just conv)
tzone <- liftIO $ getCurrentTimeZone
tlines <- liftIO $ mapM (printLine term . formatMessageLine tzone) $
reverse $ takeWhile messageUnread $ conversationHistory conv
var <- asks ciCurrentLinesVar
liftIO $ modifyMVar_ var $ \_ -> return (reverse tlines)
Left _ -> do
liftIO $ updatePromptStatus term h Nothing
cmdSend :: Command
cmdSend = void $ do
text <- asks ciLine
conv <- getSelectedConversation
sendMessage conv (T.pack text)
cmdDelete :: Command
cmdDelete = void $ do
deleteConversation =<< getConversationFromContext =<< getSelectedOrManualContext
modify $ \s -> s { csContext = NoContext }
cmdHistory :: Command
cmdHistory = void $ do
conv <- getConversationFromContext =<< getSelectedOrManualContext
case conversationHistory conv of
thread@(_:_) -> do
tzone <- liftIO $ getCurrentTimeZone
term <- asks ciTerminal
tlines <- liftIO $ mapM (printLine term . formatMessageLine tzone) $ reverse $ take 50 thread
var <- asks ciCurrentLinesVar
liftIO $ modifyMVar_ var $ \_ -> return (reverse tlines)
[] -> do
cmdPutStrLn $ withStyle (setForegroundColor BrightBlack noStyle) $ plainText "(empty history)"
showIdentityDetails :: Foldable f => Identity f -> Text
showIdentityDetails identity = T.unlines $ go $ reverse $ unfoldOwners identity
where
go (i : is) = concat
[ maybeToList $ ("Name: " <>) <$> idName i
, map (("Ref: " <>) . T.pack . show . refDigest . storedRef) $ idDataF i
, map (("ExtRef: " <>) . T.pack . show . refDigest . storedRef) $ filter isExtension $ idExtDataF i
, do guard $ not (null is)
"" : "Device:" : map (" " <>) (go is)
]
go [] = []
isExtension x = case fromSigned x of BaseIdentityData {} -> False
_ -> True
cmdIdentity :: Command
cmdIdentity = do
cmdPutStrLn . plainText . showIdentityDetails . localIdentity . fromStored =<< getLocalHead
cmdUpdateIdentity :: Command
cmdUpdateIdentity = void $ do
term <- asks ciTerminal
runReaderT (updateSharedIdentity term) =<< gets csHead
cmdAttach :: Command
cmdAttach = attachToOwner =<< getSelectedPeer
cmdAttachAccept :: Command
cmdAttachAccept = attachAccept =<< getSelectedPeer
cmdAttachReject :: Command
cmdAttachReject = attachReject =<< getSelectedPeer
watchChatroomsForCli
:: Bool -> (FormattedText -> IO ()) -> Head LocalState -> MVar (Set ChatroomState)
-> MVar CommandContext -> MVar ( Maybe ContextWatchOptions, [ CommandContext ] )
-> Maybe Int -> IO WatchedHead
watchChatroomsForCli tui eprint h chatroomSetVar contextVar contextOptsVar autoSubscribe = do
subscribedNumVar <- newEmptyMVar
let ctxUpdate updateType (idx :: Int) rstate = \case
SelectedChatroom rstate' : rest
| currentRoots <- filterAncestors (concatMap storedRoots $ roomStateData rstate)
, any ((`intersectsSorted` currentRoots) . storedRoots) $ roomStateData rstate'
-> do
eprint $ formatSelectOption idx $ "CHATROOM " <> updateType <> " " <> name
return (SelectedChatroom rstate : rest)
selected : rest
-> do
(selected : ) <$> ctxUpdate updateType (idx + 1) rstate rest
[]
-> do
eprint $ formatSelectOption idx $ "CHATROOM " <> updateType <> " " <> name
return [ SelectedChatroom rstate ]
where
name = maybe "<unnamed>" plainText $ roomName =<< roomStateRoom rstate
watchChatrooms h $ \set -> \case
Nothing -> do
let chatroomList = filter (not . roomStateDeleted) $ fromSetBy (comparing roomStateData) set
(subscribed, notSubscribed) = partition roomStateSubscribe chatroomList
subscribedNum = length subscribed
putMVar chatroomSetVar set
putMVar subscribedNumVar subscribedNum
case autoSubscribe of
Nothing -> return ()
Just num -> do
forM_ (take (num - subscribedNum) notSubscribed) $ \rstate -> do
(runExceptT $ flip runReaderT h $ chatroomSetSubscribe (head $ roomStateData rstate) True) >>= \case
Right () -> return ()
Left err -> eprint $ plainText $ T.pack $ showErebosError err
Just diff -> do
modifyMVar_ chatroomSetVar $ return . const set
modifyMVar_ contextOptsVar $ \case
( watch, clist )
| watch == Just WatchChatrooms || not tui
-> do
let upd c = \case
AddedChatroom rstate -> ctxUpdate optionLabelNew 1 rstate c
RemovedChatroom rstate -> ctxUpdate optionLabelDel 1 rstate c
UpdatedChatroom _ rstate
| any ((\rsd -> not (null (rsdRoom rsd))) . fromStored) (roomStateData rstate)
-> do
ctxUpdate optionLabelUpd 1 rstate c
| otherwise -> return c
( watch, ) <$> foldM upd clist diff
cur -> return cur
forM_ diff $ \case
AddedChatroom rstate -> do
modifyMVar_ subscribedNumVar $ return . if roomStateSubscribe rstate then (+ 1) else id
RemovedChatroom rstate -> do
modifyMVar_ subscribedNumVar $ return . if roomStateSubscribe rstate then subtract 1 else id
UpdatedChatroom oldroom rstate -> do
when (any (not . null . rsdMessages . fromStored) (roomStateData rstate)) $ do
withMVar contextVar $ \ctx -> do
isSelected <- case ctx of
SelectedChatroom rstate' -> return $ isSameChatroom rstate' rstate
SelectedConversation conv -> return $ isChatroomStateConversation rstate conv
_ -> return False
when (not tui || isSelected) $ do
tzone <- getCurrentTimeZone
forM_ (reverse $ getMessagesSinceState rstate oldroom) $ \msg -> do
eprint $ formatMessageLine tzone $ makeMessage False msg
modifyMVar_ subscribedNumVar $ return
. (if roomStateSubscribe rstate then (+ 1) else id)
. (if roomStateSubscribe oldroom then subtract 1 else id)
ensureWatchedChatrooms :: Command
ensureWatchedChatrooms = do
gets csWatchChatrooms >>= \case
Nothing -> do
eprint <- asks ciPrint
h <- gets csHead
chatroomSetVar <- asks ciChatroomSetVar
contextVar <- asks ciContextVar
contextOptsVar <- asks ciContextOptionsVar
autoSubscribe <- asks $ optChatroomAutoSubscribe . ciOptions
tui <- asks $ hasTerminalUI . ciTerminal
watched <- liftIO $ watchChatroomsForCli tui eprint h chatroomSetVar contextVar contextOptsVar autoSubscribe
modify $ \s -> s { csWatchChatrooms = Just watched }
Just _ -> return ()
cmdChatrooms :: Command
cmdChatrooms = do
ensureWatchedChatrooms
chatroomSetVar <- asks ciChatroomSetVar
chatroomList <- filter (not . roomStateDeleted) . fromSetBy (comparing roomStateData) <$> liftIO (readMVar chatroomSetVar)
set <- asks ciSetContextOptions
set WatchChatrooms $ map SelectedChatroom chatroomList
forM_ (zip [1..] chatroomList) $ \(i :: Int, rstate) -> do
printSelectOption i $ plainText $ fromMaybe "<unnamed>" (roomName =<< roomStateRoom rstate)
cmdChatroomCreatePublic :: Command
cmdChatroomCreatePublic = do
term <- asks ciTerminal
name <- asks ciLine >>= \case
line | not (null line) -> return $ T.pack line
_ -> liftIO $ do
setPrompt term "Name: "
getInputLine term $ KeepPrompt . maybe T.empty T.pack
ensureWatchedChatrooms
contextOptsVar <- asks ciContextOptionsVar
liftIO $ modifyMVar_ contextOptsVar $ return . first (const $ Just WatchChatrooms)
void $ createChatroom
(if T.null name then Nothing else Just name)
Nothing
cmdContacts :: Command
cmdContacts = do
args <- words <$> asks ciLine
ehead <- gets csHead
let contacts = fromSetBy (comparing contactName) $ lookupSharedValue $ lsShared $ headObject ehead
verbose = "-v" `elem` args
set <- asks ciSetContextOptions
set WatchContacts $ map SelectedContact contacts
forM_ (zip [1..] contacts) $ \(i :: Int, c) -> do
printSelectOption i $ plainText $ T.concat
[ contactName c
, case contactIdentity c of
Just idt | cname <- displayIdentity idt
, cname /= contactName c
-> " (" <> cname <> ")"
_ -> ""
, if verbose then " " <> (T.unwords $ map (T.decodeUtf8 . showRef . storedRef) $ maybe [] idDataF $ contactIdentity c)
else ""
]
cmdContactAdd :: Command
cmdContactAdd = contactRequest =<< getSelectedPeer
cmdContactAccept :: Command
cmdContactAccept = contactAccept =<< getSelectedPeer
cmdContactReject :: Command
cmdContactReject = contactReject =<< getSelectedPeer
cmdInviteContact :: Command
cmdInviteContact = do
term <- asks ciTerminal
name <- asks ciLine >>= \case
line | not (null line) -> return $ T.pack line
_ -> liftIO $ do
setPrompt term "Name: "
getInputLine term $ KeepPrompt . maybe T.empty T.pack
(lookupSharedValue . lsShared . fromStored <$> getLocalHead) >>= \case
Just (self :: ComposedIdentity) -> do
invite <- createSingleContactInvite name
dgst : _ <- return $ refDigest . storedRef <$> idDataF self
cmdPutStrLn $ plainText $ "https://app.erebosprotocol.net/#inv" <> (maybe "" (("=" <>) . textInviteToken) (inviteToken invite)) <> "&from=blake2%23" <> T.pack (drop 7 (show dgst))
Nothing -> do
throwOtherError "no shared identity"
cmdInviteAccept :: Command
cmdInviteAccept = do
term <- asks ciTerminal
url <- asks ciLine >>= \case
line | not (null line) -> return $ T.pack line
_ -> liftIO $ do
setPrompt term "URL: "
getInputLine term $ KeepPrompt . maybe T.empty T.pack
case T.breakOn "://" url of
( proto, url' )
| proto `elem` [ "http", "https" ]
, ( _, url'' ) <- T.breakOn "#" url'
, Just ( '#', params ) <- T.uncons url''
, [ pfrom, pinv ] <- sort $ T.splitOn "&" params
, ( nfrom, tfrom ) <- T.splitAt 14 pfrom, nfrom == "from=blake2%23"
, ( ninv, tinv ) <- T.splitAt 4 pinv, ninv == "inv="
, Just from <- readRefDigest $ T.encodeUtf8 $ "blake2#" <> tfrom
, Just token <- parseInviteToken tinv
-> do
acceptInvite from token
_ -> throwOtherError "invalit invite URL"
cmdConversations :: Command
cmdConversations = do
conversations <- lookupConversations
set <- asks ciSetContextOptions
set WatchConversations $ map SelectedConversation conversations
forM_ (zip [1..] conversations) $ \(i :: Int, conv) -> do
printSelectOption i $ plainText $ conversationName conv
cmdNew :: Command
cmdNew = do
conversations <- mapMaybe checkNew <$> lookupConversations
set <- asks ciSetContextOptions
set WatchConversations $ map (SelectedConversation . fst) conversations
tzone <- liftIO $ getCurrentTimeZone
forM_ (zip [1..] conversations) $ \(i :: Int, ( conv, msg )) -> do
printSelectOption i $ plainText (conversationName conv <> " ") <> formatMessageFT tzone msg
where
checkNew conv
| (msg : _) <- conversationHistory conv
, messageUnread msg
= Just ( conv, msg )
checkNew _ = Nothing
cmdSeen :: Command
cmdSeen = markAllSeen =<< getSelectedConversation
cmdDetails :: Command
cmdDetails = do
getSelectedOrManualContext >>= \case
SelectedPeer peer -> do
paddr <- getPeerAddress peer
cmdPutStrLn $ plainText $ T.unlines
[ "Network peer:"
, " " <> T.pack (show paddr)
]
getPeerIdentity peer >>= \case
PeerIdentityUnknown _ -> do
cmdPutStrLn $ "unknown identity"
PeerIdentityRef wref _ -> do
cmdPutStrLn $ "Identity ref:"
cmdPutStrLn $ plainText $ " " <> T.decodeUtf8 (showRefDigest $ wrDigest wref)
PeerIdentityFull pid -> printContactOrIdentityDetails pid
SelectedContact contact -> do
printContactDetails contact
SelectedChatroom rstate -> do
cmdPutStrLn $ plainText $ "Chatroom: " <> (fromMaybe "<unnamed>" $ roomName =<< roomStateRoom rstate)
SelectedConversation conv -> do
case conversationPeer conv of
Just pid -> printContactOrIdentityDetails pid
Nothing -> cmdPutStrLn $ "(conversation without peer)"
NoContext -> cmdPutStrLn "nothing selected"
where
printContactOrIdentityDetails cid = do
contacts <- fromSetBy (comparing contactName) . lookupSharedValue . lsShared . fromStored <$> getLocalHead
case find (maybe False (sameIdentity cid) . contactIdentity) contacts of
Just contact -> printContactDetails contact
Nothing -> printIdentityDetails cid
printContactDetails contact = do
cmdPutStrLn $ "Contact:"
prefix <- case contactCustomName contact of
Just name -> do
cmdPutStrLn $ plainText $ " " <> name
return $ Just "alias of"
Nothing -> do
return $ Nothing
case contactIdentity contact of
Just cid -> do
printIdentityDetailsBody prefix cid
Nothing -> do
cmdPutStrLn $ " (without erebos identity)"
printIdentityDetails identity = do
cmdPutStrLn $ "Identity:"
printIdentityDetailsBody Nothing identity
printIdentityDetailsBody prefix identity = do
forM_ (zip (False : repeat True) $ unfoldOwners identity) $ \(owned, cpid) -> do
cmdPutStrLn $ plainText $ T.unwords $ concat
[ [ " " ]
, if owned then [ "owned by" ] else maybeToList prefix
, [ fromMaybe "<unnamed>" (idName cpid) ]
, map (T.decodeUtf8 . showRefDigest . refDigest . storedRef) $ idExtDataF cpid
]
cmdDiscovery :: Command
cmdDiscovery = void $ do
server <- asks ciServer
sref <- asks ciLine
case readRefDigest (BC.pack sref) of
Nothing -> throwOtherError "failed to parse ref"
Just dgst -> discoverySearch server dgst
cmdQuit :: Command
cmdQuit = modify $ \s -> s { csQuit = True }
intersectsSorted :: Ord a => [a] -> [a] -> Bool
intersectsSorted (x:xs) (y:ys) | x < y = intersectsSorted xs (y:ys)
| x > y = intersectsSorted (x:xs) ys
| otherwise = True
intersectsSorted _ _ = False