Add Omnibot.Module

Modules can easily be defined with `use Omnibot.Module`.
Omnibot.Contrib.Fortune has been updated to use this.

Signed-off-by: Alek Ratzloff <alekratz@gmail.com>

lib/router.ex

@@ -3,6 +3,19 @@ defmodule Omnibot.Router do
   alias Omnibot.{Config, Irc, Irc.Msg, State}
   
   def route(irc, msg) do
+    # TODO - consider removing this check and specific handling into the `use Omnibot.Module` block
+    # PROS:
+    # - Don't have to determine message command twice (first here, second in Omnibot.Module)
+    # - Allows for much more powerful modules. JOIN, PART, KICK, etc handlers would be modules themselves
+    #   - This is an extremely big win IMO
+    #
+    # CONS:
+    # - All routed functionality needs to be in a module
+    #   - This may get a little old
+    # - A failed command could cause important messages to be missed (?)
+    #   - Do messages in a named PID's mailbox persist after that PID goes away? My guess is "no"
+    #   - To get around this, there could be a mailbox for "special" commands, probably using ETS
+    # 
     case String.upcase(msg.command) do
       "PRIVMSG" -> handle(irc, :privmsg, msg)
       "JOIN" -> handle(irc, :join, msg)
@@ -15,15 +28,12 @@ defmodule Omnibot.Router do
   end
 
   def handle(_irc, :privmsg, msg) do
-    # TODO : get channel, pass along to modules
-    [channel | params] = msg.params
-    line = Enum.join(params, " ")
-    nick = msg.prefix.nick
+    [channel | _params] = msg.params
 
     # Find modules that want this message
     State.cfg()
       |> Config.channel_modules(channel)
-      |> Enum.each(fn {module, _} -> module.privmsg(module, channel, nick, line) end)
+      |> Enum.each(fn {module, _} -> module.msg(module, msg) end)
   end
 
   def handle(_irc, :join, %Msg {prefix: %Msg.Prefix{nick: nick}, params: [channel | _]}) do