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# Source code for slixmpp.plugins.xep_0085.chat_states

    # Slixmpp: The Slick XMPP Library
    # Copyright (C) 2011 Nathanael C. Fritz, Lance J.T. Stout
    # This file is part of Slixmpp.
    # See the file LICENSE for copying permissio
    import logging

    from slixmpp.stanza import Message
    from slixmpp.xmlstream.handler import Callback
    from slixmpp.xmlstream.matcher import StanzaPath
    from slixmpp.xmlstream import register_stanza_plugin
    from slixmpp.plugins import BasePlugin
    from slixmpp.plugins.xep_0085 import stanza, ChatState

    log = logging.getLogger(__name__)

    class XEP_0085(BasePlugin):

        """
        XEP-0085 Chat State Notifications
        """

        name = 'xep_0085'
        description = 'XEP-0085: Chat State Notifications'
        dependencies = {'xep_0030'}
        stanza = stanza

        def plugin_init(self):
            self.xmpp.register_handler(
                Callback('Chat State',
                         StanzaPath('message/chat_state'),
                         self._handle_chat_state))

            register_stanza_plugin(Message, stanza.Active)
            register_stanza_plugin(Message, stanza.Composing)
            register_stanza_plugin(Message, stanza.Gone)
            register_stanza_plugin(Message, stanza.Inactive)
            register_stanza_plugin(Message, stanza.Paused)

        def plugin_end(self):
            self.xmpp.remove_handler('Chat State')

        def session_bind(self, jid):
            self.xmpp.plugin['xep_0030'].add_feature(ChatState.namespace)

        def _handle_chat_state(self, msg):
            state = msg['chat_state']
            log.debug("Chat State: %s, %s", state, msg['from'].jid)
            self.xmpp.event('chatstate', msg)
            self.xmpp.event('chatstate_%s' % state, msg)