join room on invitation

src/xmpp.coffee

@@ -151,6 +151,12 @@ class XmppBot extends Adapter
       @client.send pong
 
   readMessage: (stanza) =>
+
+    if (x = stanza.getChild('x', 'jabber:x:conference')) and x?.attrs?
+      @robot.logger.debug '[joining room]', x.attrs
+      @options.rooms.push x.attrs
+      @joinRoom x.attrs
+
     # ignore non-messages
     return if stanza.attrs.type not in ['groupchat', 'direct', 'chat']
     return if stanza.attrs.from is undefined

test/adapter-test.coffee

@@ -67,6 +67,36 @@ describe 'XmppBot', ->
           done()
         bot.joinRoom protectedRoom
 
+  describe '#invites', ->
+
+    it 'joins when invited', (done) ->
+
+      bot = Bot.use()
+
+      bot.client =
+        stub: 'xmpp client'
+
+      bot.robot =
+        name: 'bot'
+        logger:
+          debug: () ->
+      room =
+        jid: 'test@example.com'
+        password: false
+
+      stanza = new Xmpp.Stanza 'message'
+      stanza.c 'x', {xmlns: 'jabber:x:conference', jid: room.jid, password: room.password}
+
+      bot.options = {rooms:[]}
+
+      bot.joinRoom = (r) ->
+        assert r.jid is room.jid, 'jid match'
+        assert r.password is room.password, 'password match'
+        done()
+
+      bot.readMessage.call bot, stanza
+
+
   describe '#leaveRoom()', ->
     bot = Bot.use()
     bot.client =