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{-# LANGUAGE DataKinds #-}
{-# LANGUAGE LambdaCase #-}
{-# LANGUAGE OverloadedStrings #-}
{-# LANGUAGE RecordWildCards #-}
{-# LANGUAGE TypeOperators #-}
module Reaktor.API where
import Blessings
import Control.Concurrent
import Control.Exception (bracket)
import Control.Monad
import Control.Monad.IO.Class
import Data.Aeson
import Data.Aeson.Types (typeMismatch)
import Data.Function ((&))
import Data.Proxy (Proxy)
import qualified Data.Text as T
import Network.Socket.Extended
import Network.Wai
import Network.Wai.Handler.Warp
import Reaktor.Internal (Actions(..),Message(..))
import Reaktor.IRC
import Servant
type API =
ReqBody '[JSON] Message :> PostAccepted '[JSON] NoContent
data Config = Config
{ cListen :: String
}
instance FromJSON Config where
parseJSON = \case
Object v -> do
cListen <- v .: "listen"
pure Config{..}
invalid -> typeMismatch "Config" invalid
api :: Proxy API
api = Proxy
main :: Actions -> Maybe Config -> IO ()
main Actions{..} = \case
Just Config{..} ->
either disable enable =<< readListenString cListen
Nothing ->
disable "no configuration"
where
enable sockAddr =
bracket
(openSocket sockAddr)
closeSocket
$ \sock -> do
aLog $ SGR [38,5,155]
("* enabling API on " <> Plain (T.pack $ show sockAddr))
let port = getAddrPort sockAddr
settings = defaultSettings & setPort port
bind sock sockAddr
listen sock maxListenQueue
runSettingsSocket settings sock
$ app
disable :: String -> IO ()
disable reason = do
aLog $ SGR [38,5,196]
("! disabling API due to " <> Plain (T.pack reason))
forever $ threadDelay 60000
app :: Application
app = serve api server
server :: Server API
server =
serveTest
serveTest :: Message -> Handler NoContent
serveTest = \case
-- Allowing notice messages to (registered) channels.
msg@(Message Nothing NOTICE [msgtarget,_]) | isChannelName msgtarget -> do
liftIO $ aSend msg
return NoContent
-- Allowing private messages to (registered) channels.
msg@(Message Nothing PRIVMSG [msgtarget,_]) | isChannelName msgtarget -> do
liftIO $ aSend msg
return NoContent
-- Allowing topic setting on (registered) channels.
msg@(Message Nothing TOPIC [msgtarget,_]) | isChannelName msgtarget -> do
liftIO $ aSend msg
return NoContent
_ ->
throwError err403
where
-- Channel names are defined in RFC 2812, 1.3
isChannelName msgtarget =
case T.uncons msgtarget of
Just (c, _) -> c `elem` ("&#+!" :: String)
Nothing -> False
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