Reformat Help output

Instead of printing all help text on a single line as a result of
joining the list of help text, print each plugin's help on a separate
line.

Also separate commands from descriptions with a dash instead of a tab as
the tab character was getting rendered as an `I` in irssi instead of the
actual whitespace I had been hoping for. The dash in inspired by Hubot.

In order to print multiple lines of output, we needed to change the IRC
PRIVMSG handler. This now splits the plugin result at newlines into a
list and sends separate PRIVMSGs for each line of output. Before, text
with newlines would only show the first line in the resulting IRC
message.

Assume plugin error messages will always be a single line.

2 files changed, 12 insertions, 11 deletions

diff --git a/src/IRC.hs b/src/IRC.hs
index d086511..259772c 100644
--- a/src/IRC.hs
+++ b/src/IRC.hs
@@ -4,6 +4,7 @@ module IRC
     ( connectIRC
     ) where
 
+import Control.Monad (sequence_)
 import Control.Monad.IO.Class (liftIO)
 import qualified Data.ByteString as B
 import qualified Data.Text as T
@@ -40,7 +41,7 @@ handlePrivmsg = IRC.EventHandler
         response <- liftIO $ privmsgFromPlugin message
         case response of
             Nothing -> return ()
-            Just r  -> r
+            Just r  -> sequence_ r
     dispatchEvent (IRC.Event
       _ (IRC.Channel chan nick) (IRC.Privmsg _ (Right msg))) = do
         let message = Message
@@ -51,18 +52,18 @@ handlePrivmsg = IRC.EventHandler
         response <- liftIO $ privmsgFromPlugin message
         case response of
             Nothing -> return ()
-            Just r  -> r
+            Just r  -> sequence_ r
 
-privmsgFromPlugin :: Message -> IO (Maybe (IRC.StatefulIRC s ()))
+privmsgFromPlugin :: Message -> IO (Maybe [IRC.StatefulIRC s ()])
 privmsgFromPlugin message = do
     case matchPlugin message of
         Nothing     -> return Nothing
         Just plugin -> do
             response <- liftIO $ performPlugin plugin message
             return $ case response of
-                Left err -> Just $ IRC.send $ IRC.Privmsg
-                    (channel message)
-                    (Right err)
-                Right r  -> Just $ IRC.send $ IRC.Privmsg
-                    (channel message)
-                    (Right r)
+                Left err -> Just $
+                    [IRC.send $ IRC.Privmsg (channel message) (Right err)]
+                Right r  -> Just $
+                    map (\r ->
+                            IRC.send $ IRC.Privmsg (channel message) (Right r) )
+                        (T.lines r)
diff --git a/src/Plugin/Help.hs b/src/Plugin/Help.hs
index 57e106d..470dd33 100644
--- a/src/Plugin/Help.hs
+++ b/src/Plugin/Help.hs
@@ -18,8 +18,8 @@ help = Plugin
 
 helpAction :: PluginAction
 helpAction _ = do
-    return $ Right $ T.concat
-        [command p `T.append` "\t" `T.append` description p | p <- plugins]
+    return $ Right $ T.intercalate "\n"
+        [command p `T.append` " – " `T.append` description p | p <- plugins]
 
 plugins :: [Plugin]
 plugins = PL.plugins ++ [help]