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module Hsbot.Plugin
( killPlugin
, spawnIrcPlugins
, spawnIrcPlugin
, unloadPlugin
) where
import Control.Concurrent
import Control.Concurrent.Chan ()
import Control.Exception
import Control.Monad.State
import qualified Data.Map as M
import Prelude hiding (catch)
import Hsbot.Config
import Hsbot.Irc.Config
import Hsbot.Irc.Core
import Hsbot.Types
-- | spawns IrcPlugins
spawnIrcPlugins :: Bot ()
spawnIrcPlugins = do
config <- gets botConfig
mapM_ (spawnIrcPlugin) (ircConfigs config)
-- | spawns a single irc plugin
spawnIrcPlugin :: IrcConfig -> Bot ()
spawnIrcPlugin config = do
bot <- get
let chan = botChan bot
pchan <- liftIO (newChan :: IO (Chan BotMsg))
threadId <- liftIO $ forkIO (startIrcbot config chan pchan)
let plugin = PluginState { pluginName = ircConfigName config
, pluginChan = pchan
, pluginHandles = M.empty }
plugins = botPlugins bot
put $ bot { botPlugins = M.insert (pluginName plugin) (plugin, threadId) plugins }
-- | Unloads a plugin
unloadPlugin :: String -> Bot ()
unloadPlugin name = do
killPlugin name
resumeData <- gets botResumeData
liftIO $ modifyMVar_ resumeData (\oldData -> return $ M.delete name oldData)
-- | kills a plugin
killPlugin :: String -> Bot ()
killPlugin name = do
bot <- get
let oldPlugins = botPlugins bot
-- We check if the plugin exists
case M.lookup name oldPlugins of
Just (_, threadId) -> do
let newPlugins = M.delete name oldPlugins
liftIO $ throwTo threadId UserInterrupt
put $ bot { botPlugins = newPlugins }
Nothing -> return ()
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