Continue refactoring, worked on the core loop and the plugin infrastructure.

Hsbot/Plugin/Ping.hs

@@ -0,0 +1,38 @@
+module Hsbot.Plugin.Ping
+    ( pingId
+    , ping
+    ) where
+
+import Control.Concurrent.Chan ()
+import Control.Exception
+import Control.Monad.State (execStateT, forever)
+import qualified Network.IRC as IRC
+import Prelude hiding (catch)
+
+import Hsbot.Message
+import Hsbot.Types
+import Hsbot.Utils
+
+pingId :: PluginId
+pingId = PluginId
+    { pluginName = "ping"
+    , pluginEp   = ping }
+
+-- | The plugin's main entry point
+ping :: PluginState -> IO ()
+ping state = do
+    _ <- (execStateT run state) `catch` (\(_ :: AsyncException) -> return state)
+    return ()
+
+-- | The IrcPlugin monad main function
+run :: Plugin IO ()
+run = forever $ do
+    msg <- readMsg
+    eval msg
+  where
+    eval :: Message -> Plugin IO ()
+    eval (IncomingMsg msg)
+        | (IRC.msg_command msg) == "PING" = writeMsg . OutgoingMsg . IRC.Message Nothing "PONG" $ IRC.msg_params msg
+        | otherwise = return ()
+    eval _ = return ()
+