Updated the XEP-0085 plugin.

Can now be used as so:

>>> msg['chat_state']
''
>>> msg
<message />

>>> msg['chat_state'] = 'paused'
>>> msg
<message>
  <paused xmlns="http://jabber.org/protocol/chatstates" />
</message>

>>> msg['chat_state']
'paused'

>>> del msg['chat_state']
>>> msg
<message />

6 files changed, 149 insertions, 124 deletions

diff --git a/setup.py b/setup.py
index ae8cf682..4575a078 100644
--- a/setup.py
+++ b/setup.py
@@ -50,6 +50,7 @@ packages     = [ 'sleekxmpp',
                  'sleekxmpp/plugins/xep_0030',

                  'sleekxmpp/plugins/xep_0030/stanza',

                  'sleekxmpp/plugins/xep_0059',

+                 'sleekxmpp/plugins/xep_0085',

                  'sleekxmpp/plugins/xep_0092',

                  'sleekxmpp/plugins/xep_0199',

                  ]

diff --git a/sleekxmpp/plugins/xep_0085.py b/sleekxmpp/plugins/xep_0085.py
deleted file mode 100644
index 3627e718..00000000
--- a/sleekxmpp/plugins/xep_0085.py
+++ /dev/null
@@ -1,104 +0,0 @@
-"""
-    SleekXMPP: The Sleek XMPP Library
-    Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
-    This file is part of SleekXMPP.
-
-    See the file LICENSE for copying permissio
-"""
-
-import logging
-from . import base
-from .. xmlstream.handler.callback import Callback
-from .. xmlstream.matcher.xpath import MatchXPath
-from .. xmlstream.stanzabase import registerStanzaPlugin, ElementBase, ET, JID
-from .. stanza.message import Message
-
-
-log = logging.getLogger(__name__)
-
-
-class ChatState(ElementBase):
-    namespace = 'http://jabber.org/protocol/chatstates'
-    plugin_attrib = 'chat_state'
-    interface = set(('state',))
-    states = set(('active', 'composing', 'gone', 'inactive', 'paused'))
-
-    def active(self):
-        self.setState('active')
-
-    def composing(self):
-        self.setState('composing')
-
-    def gone(self):
-        self.setState('gone')
-
-    def inactive(self):
-        self.setState('inactive')
-
-    def paused(self):
-        self.setState('paused')
-
-    def setState(self, state):
-        if state in self.states:
-            self.name = state
-            self.xml.tag = '{%s}%s' % (self.namespace, state)
-        else:
-            raise ValueError('Invalid chat state')
-
-    def getState(self):
-        return self.name
-
-# In order to match the various chat state elements,
-# we need one stanza object per state, even though
-# they are all the same except for the initial name
-# value. Do not depend on the type of the chat state
-# stanza object for the actual state.
-
-class Active(ChatState):
-    name = 'active'
-class Composing(ChatState):
-    name = 'composing'
-class Gone(ChatState):
-    name = 'gone'
-class Inactive(ChatState):
-    name = 'inactive'
-class Paused(ChatState):
-    name = 'paused'
-
-
-class xep_0085(base.base_plugin):
-    """
-    XEP-0085 Chat State Notifications
-    """
-
-    def plugin_init(self):
-        self.xep = '0085'
-        self.description = 'Chat State Notifications'
-
-        handlers = [('Active Chat State', 'active'),
-                    ('Composing Chat State', 'composing'),
-                    ('Gone Chat State', 'gone'),
-                    ('Inactive Chat State', 'inactive'),
-                    ('Paused Chat State', 'paused')]
-        for handler in handlers:
-            self.xmpp.registerHandler(
-                Callback(handler[0],
-                         MatchXPath("{%s}message/{%s}%s" % (self.xmpp.default_ns,
-                                                            ChatState.namespace,
-                                                            handler[1])),
-                         self._handleChatState))
-
-        registerStanzaPlugin(Message, Active)
-        registerStanzaPlugin(Message, Composing)
-        registerStanzaPlugin(Message, Gone)
-        registerStanzaPlugin(Message, Inactive)
-        registerStanzaPlugin(Message, Paused)
-
-    def post_init(self):
-        base.base_plugin.post_init(self)
-        self.xmpp.plugin['xep_0030'].add_feature('http://jabber.org/protocol/chatstates')
-
-    def _handleChatState(self, msg):
-        state = msg['chat_state'].name
-        log.debug("Chat State: %s, %s" % (state, msg['from'].jid))
-        self.xmpp.event('chatstate_%s' % state, msg)
diff --git a/sleekxmpp/plugins/xep_0085/__init__.py b/sleekxmpp/plugins/xep_0085/__init__.py
new file mode 100644
index 00000000..ff882f05
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0085/__init__.py
@@ -0,0 +1,10 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permissio
+"""
+
+from sleekxmpp.plugins.xep_0085.stanza import ChatState
+from sleekxmpp.plugins.xep_0085.chat_states import xep_0085
diff --git a/sleekxmpp/plugins/xep_0085/chat_states.py b/sleekxmpp/plugins/xep_0085/chat_states.py
new file mode 100644
index 00000000..a2feb531
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0085/chat_states.py
@@ -0,0 +1,48 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permissio
+"""
+
+import logging
+
+import sleekxmpp
+from sleekxmpp.stanza import Message
+from sleekxmpp.xmlstream.handler import Callback
+from sleekxmpp.xmlstream.matcher import StanzaPath
+from sleekxmpp.xmlstream import register_stanza_plugin, ElementBase, ET
+from sleekxmpp.plugins.base import base_plugin
+from sleekxmpp.plugins.xep_0085 import stanza
+
+
+log = logging.getLogger(__name__)
+
+
+class xep_0085(base_plugin):
+
+    """
+    XEP-0085 Chat State Notifications
+    """
+
+    def plugin_init(self):
+        self.xep = '0085'
+        self.description = 'Chat State Notifications'
+        self.stanza = stanza
+
+        self.xmpp.registerHandler(
+            Callback('Chat States',
+                     StanzaPath('message/chat_state'),
+                     self._handle_chat_state))
+
+        register_stanza_plugin(Message, stanza.ChatState)
+
+    def post_init(self):
+        base_plugin.post_init(self)
+        self.xmpp.plugin['xep_0030'].add_feature(stanza.ChatState.namepsace)
+
+    def _handle_chat_state(self, msg):
+        state = msg['chat_state']
+        log.debug("Chat State: %s, %s" % (state, msg['from'].jid))
+        self.xmpp.event('chatstate_%s' % state, msg)
diff --git a/sleekxmpp/plugins/xep_0085/stanza.py b/sleekxmpp/plugins/xep_0085/stanza.py
new file mode 100644
index 00000000..8c46758c
--- /dev/null
+++ b/sleekxmpp/plugins/xep_0085/stanza.py
@@ -0,0 +1,73 @@
+"""
+    SleekXMPP: The Sleek XMPP Library
+    Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
+    This file is part of SleekXMPP.
+
+    See the file LICENSE for copying permissio
+"""
+
+import sleekxmpp
+from sleekxmpp.xmlstream import ElementBase, ET
+
+
+class ChatState(ElementBase):
+
+    """
+    Example chat state stanzas:
+        <message>
+          <active xmlns="http://jabber.org/protocol/chatstates" />
+        </message>
+
+        <message>
+          <paused xmlns="http://jabber.org/protocol/chatstates" />
+        </message>
+
+    Stanza Interfaces:
+        chat_state
+
+    Attributes:
+        states
+
+    Methods:
+        get_chat_state
+        set_chat_state
+        del_chat_state
+    """
+
+    name = ''
+    namespace = 'http://jabber.org/protocol/chatstates'
+    plugin_attrib = 'chat_state'
+    interfaces = set(('chat_state',))
+    is_extension = True
+
+    states = set(('active', 'composing', 'gone', 'inactive', 'paused'))
+
+    def setup(self, xml=None):
+        self.xml = ET.Element('')
+        return True
+
+    def get_chat_state(self):
+        parent = self.parent()
+        for state in self.states:
+            state_xml = parent.find('{%s}%s' % (self.namespace, state))
+            if state_xml is not None:
+                self.xml = state_xml
+                return state
+        return ''
+
+    def set_chat_state(self, state):
+        self.del_chat_state()
+        parent = self.parent()
+        if state in self.states:
+            self.xml = ET.Element('{%s}%s' % (self.namespace, state))
+            parent.append(self.xml)
+        elif state not in [None, '']:
+            raise ValueError('Invalid chat state')
+
+    def del_chat_state(self):
+        parent = self.parent()
+        for state in self.states:
+            state_xml = parent.find('{%s}%s' % (self.namespace, state))
+            if state_xml is not None:
+                self.xml = ET.Element('')
+                parent.xml.remove(state_xml)
diff --git a/tests/test_stanza_xep_0085.py b/tests/test_stanza_xep_0085.py
index 5db7139a..b08404e2 100644
--- a/tests/test_stanza_xep_0085.py
+++ b/tests/test_stanza_xep_0085.py
@@ -4,11 +4,7 @@ import sleekxmpp.plugins.xep_0085 as xep_0085
 class TestChatStates(SleekTest):
 
     def setUp(self):
-        register_stanza_plugin(Message, xep_0085.Active)
-        register_stanza_plugin(Message, xep_0085.Composing)
-        register_stanza_plugin(Message, xep_0085.Gone)
-        register_stanza_plugin(Message, xep_0085.Inactive)
-        register_stanza_plugin(Message, xep_0085.Paused)
+        register_stanza_plugin(Message, xep_0085.ChatState)
 
     def testCreateChatState(self):
         """Testing creating chat states."""
@@ -20,25 +16,26 @@ class TestChatStates(SleekTest):
         """
 
         msg = self.Message()
-        msg['chat_state'].active()
-        self.check(msg, xmlstring % 'active',
-                          use_values=False)
 
-        msg['chat_state'].composing()
-        self.check(msg, xmlstring % 'composing',
-                          use_values=False)
+        self.assertEqual(msg['chat_state'], '')
+        self.check(msg, "<message />", use_values=False)
 
+        msg['chat_state'] = 'active'
+        self.check(msg, xmlstring % 'active', use_values=False)
 
-        msg['chat_state'].gone()
-        self.check(msg, xmlstring % 'gone',
-                          use_values=False)
+        msg['chat_state'] = 'composing'
+        self.check(msg, xmlstring % 'composing', use_values=False)
 
-        msg['chat_state'].inactive()
-        self.check(msg, xmlstring % 'inactive',
-                          use_values=False)
+        msg['chat_state'] = 'gone'
+        self.check(msg, xmlstring % 'gone', use_values=False)
 
-        msg['chat_state'].paused()
-        self.check(msg, xmlstring % 'paused',
-                          use_values=False)
+        msg['chat_state'] = 'inactive'
+        self.check(msg, xmlstring % 'inactive', use_values=False)
+
+        msg['chat_state'] = 'paused'
+        self.check(msg, xmlstring % 'paused', use_values=False)
+
+        del msg['chat_state']
+        self.check(msg, "<message />")
 
 suite = unittest.TestLoader().loadTestsFromTestCase(TestChatStates)