From dceabdbb7ede39694ecac9e71b36124e4123e741 Mon Sep 17 00:00:00 2001
From: Matthias Schiffer <mschiffer@universe-factory.net>
Date: Wed, 2 Jan 2013 01:13:29 +0100
Subject: Add command help

---
 bot.rb             | 28 ++++++++++++++++++++--------
 module_base.rb     |  5 +++++
 modules/Credits.rb |  8 +++++++-
 modules/DDate.rb   |  8 +++++++-
 modules/Fortune.rb |  8 +++++++-
 modules/Help.rb    | 22 ++++++++++++++++++++++
 6 files changed, 68 insertions(+), 11 deletions(-)
 create mode 100644 modules/Help.rb

diff --git a/bot.rb b/bot.rb
index 6040029..524bb02 100644
--- a/bot.rb
+++ b/bot.rb
@@ -22,6 +22,8 @@ module Lain
         @modules[mod] = Modules.const_get(mod).new(self, cfg)
       }
 
+      @commands = @modules.values.reduce({}) { |c, mod| c.merge mod.commands }.to_a.sort
+
       $stderr.puts 'Connecting...'
 
       @cl = Jabber::Client.new(Jabber::JID.new(Config::JID))
@@ -36,23 +38,33 @@ module Lain
         @mucs[r] = muc
 
         muc.add_message_callback { |msg|
-          @modules.each { | _, mod |
-            begin
-              mod.on_message muc, msg
-            rescue
-            end
-          }
+          unless msg.from == r
+            @modules.each { | _, mod |
+              begin
+                mod.on_message muc, msg
+              rescue
+              end
+            }
+          end
         }
 
         $stderr.puts "Joining room `#{r}'..."
 
-        muc.join("#{r}/#{Config::Nick}")
-        muc.configure()
+        muc.join(r)
+
+        begin
+          muc.configure
+        rescue
+        end
       }
 
       $stderr.puts 'Startup finished.'
     end
 
+    def commands
+      @commands
+    end
+
     def run
       @mainthread = Thread.current
       Thread.stop
diff --git a/module_base.rb b/module_base.rb
index 01d3f74..b209e7b 100644
--- a/module_base.rb
+++ b/module_base.rb
@@ -2,11 +2,16 @@ module Lain
   module Modules
     class Base
       def initialize(lain, config)
+        @lain = lain
         @config = config
       end
 
       def on_message(muc, message)
       end
+
+      def commands
+        {}
+      end
     end
   end
 end
diff --git a/modules/Credits.rb b/modules/Credits.rb
index e0289e4..190c284 100644
--- a/modules/Credits.rb
+++ b/modules/Credits.rb
@@ -10,7 +10,13 @@ module Lain
         return unless message.type == :groupchat
         return unless /!credits\b/ =~ message.body
 
-        muc.send(Jabber::Message.new(message.to, "Lain (レイン) #{Version}\n\n -- hacked by NeoRaider"))
+        muc.send(Jabber::Message.new(message.to, "\nLain (レイン) #{Version}\n\n -- hacked by NeoRaider"))
+      end
+
+      def commands
+        {
+          '!credits' => 'show credits'
+        }
       end
     end
   end
diff --git a/modules/DDate.rb b/modules/DDate.rb
index af9912e..3c9f3e1 100644
--- a/modules/DDate.rb
+++ b/modules/DDate.rb
@@ -9,7 +9,13 @@ module Lain
         return unless message.type == :groupchat
         return unless /!ddate\b/ =~ message.body
 
-        muc.send(Jabber::Message.new(message.to, IO.popen("ddate").gets(sep=nil).chomp))
+        muc.send(Jabber::Message.new(message.to, IO.popen("ddate").read.chomp))
+      end
+
+      def commands
+        {
+          '!ddate' => 'show Discordian date'
+        }
       end
     end
   end
diff --git a/modules/Fortune.rb b/modules/Fortune.rb
index 2b9d63b..f8b237a 100644
--- a/modules/Fortune.rb
+++ b/modules/Fortune.rb
@@ -9,7 +9,13 @@ module Lain
         return unless message.type == :groupchat
         return unless /!fortune\b/ =~ message.body
 
-        muc.send(Jabber::Message.new(message.to, IO.popen(@config['command']).gets(sep=nil).chomp))
+        muc.send(Jabber::Message.new(message.to, "\n" + IO.popen(@config['command']).read.chomp))
+      end
+
+      def commands
+        {
+          '!fortune' => 'fortune cookies'
+        }
       end
     end
   end
diff --git a/modules/Help.rb b/modules/Help.rb
new file mode 100644
index 0000000..84d9a9e
--- /dev/null
+++ b/modules/Help.rb
@@ -0,0 +1,22 @@
+require 'xmpp4r/message'
+
+require_relative '../module_base'
+
+module Lain
+  module Modules
+    class Help < Base
+      def on_message(muc, message)
+        return unless message.type == :groupchat
+        return unless /!help\b/ =~ message.body
+
+        muc.send(Jabber::Message.new(message.to, "Commands:" + @lain.commands.reduce('') { |s, cmd| "#{s}\n#{cmd[0]}: #{cmd[1]}" }))
+      end
+
+      def commands
+        {
+          '!help' => 'show this help'
+        }
+      end
+    end
+  end
+end
-- 
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