From b3d04f9a06380cd1d42154a1f5f3e7725db39174 Mon Sep 17 00:00:00 2001
From: Julien Dessaux
Date: Sat, 7 May 2011 00:44:44 +0200
Subject: Added duck spawning capabilities, ready to be shot!

---
 Hsbot/Plugin/Duck.hs | 39 +++++++++++++++++++++++++++++++--------
 1 file changed, 31 insertions(+), 8 deletions(-)

(limited to 'Hsbot')

diff --git a/Hsbot/Plugin/Duck.hs b/Hsbot/Plugin/Duck.hs
index 7e8c521..4a09d28 100644
--- a/Hsbot/Plugin/Duck.hs
+++ b/Hsbot/Plugin/Duck.hs
@@ -4,26 +4,32 @@ module Hsbot.Plugin.Duck
     , theDuck
     ) where
 
-import Control.Concurrent.Chan ()
+import Control.Concurrent
 import qualified Data.List as L
 import Control.Monad.Reader
 import qualified Network.IRC as IRC
 import Prelude hiding (catch)
+import System.Random
 
 import Hsbot.Message
 import Hsbot.Types
+import Hsbot.Utils
 
 -- | The duck plugin identity
 duck :: PluginId
 duck = PluginId
     { pluginName = "duck"
-    , pluginEp   = theDuck }
+    , pluginEp   = theDuck "" 11 }
 
 -- | An IRC plugin that generates and kills ducks
-theDuck :: Plugin (Env IO) ()
-theDuck = forever $ do
-    msg <- readMsg
-    eval msg
+theDuck :: String -> Int -> Plugin (Env IO) ()
+theDuck channel seconds = do
+    env <- lift ask
+    pEnv <- ask
+    secondsMVar <- liftIO $ newMVar seconds
+    killMVar <- liftIO newEmptyMVar
+    (liftIO . forkIO $ runReaderT (runReaderT (duckSpawner channel secondsMVar killMVar) pEnv) env) >>= lift . addThreadIdToQuitMVar
+    forever $ readMsg >>= eval
   where
     eval :: Message -> Plugin (Env IO) ()
     eval (IncomingMsg msg)
@@ -31,17 +37,34 @@ theDuck = forever $ do
         | otherwise = return ()
     eval _ = return ()
 
+-- | Regularly spawns ducks on a channel, just waiting to be shot
+duckSpawner :: String -> MVar Int -> MVar Int -> Plugin (Env IO) ()
+duckSpawner channel secondsMVar killMVar = forever $ do
+    nbDucks <- liftIO . getStdRandom $ randomR (1,4)
+    liftIO $ putMVar killMVar nbDucks
+    thoseDucks <- liftIO $ someRandomDucks nbDucks ""
+    writeMsg . OutgoingMsg $ IRC.Message Nothing "PRIVMSG" [channel, thoseDucks]
+    secs <- liftIO $ readMVar secondsMVar
+    liftIO $ threadDelay (3000000 * secs)
+
 -- | Shoot as many times are there are ducks in the initial string
 isThereADuckToKillInThere :: String -> String
 isThereADuckToKillInThere = concat . concatMap (\y -> map (\x -> if x `L.isInfixOf` y then "PAN! " else "") ducks) . words
 
+someRandomDucks :: Int -> String -> IO String
+someRandomDucks 0 theDucks = return theDucks
+someRandomDucks nbDucks theDucks = do
+    whatDuck <- getStdRandom $ randomR (1,length ducks)
+    let thisDuck = ducks !! whatDuck
+    someRandomDucks (nbDucks -1 ) $ concat [thisDuck, " ", theDucks]
+
 -- | There are many ways to hide as a duck, this function tries to cover most of them
 ducks :: [String]
 ducks = [ x : y : z | x <- nose, y <- face, z <- ["__/", "_/", "/"] ]
      ++ [ L.reverse $ x : y : z | x <- nose, y <- face, z <- ["__\\", "_\\", "\\"] ]
   where
-    nose :: [Char]
+    nose :: String
     nose = "<>="
-    face :: [Char]
+    face :: String
     face = "oO°@©®ð*òôóø"
 
-- 
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