"""
    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 permission.
"""

from slixmpp import Message, Presence
from slixmpp.xmlstream import register_stanza_plugin
from slixmpp.plugins import BasePlugin
from slixmpp.plugins.xep_0131 import stanza
from slixmpp.plugins.xep_0131.stanza import Headers


class XEP_0131(BasePlugin):

    name = 'xep_0131'
    description = 'XEP-0131: Stanza Headers and Internet Metadata'
    dependencies = {'xep_0030'}
    stanza = stanza
    default_config = {
        'supported_headers': set()
    }

    def plugin_init(self):
        register_stanza_plugin(Message, Headers)
        register_stanza_plugin(Presence, Headers)

    def plugin_end(self):
        self.xmpp['xep_0030'].del_feature(feature=Headers.namespace)
        for header in self.supported_headers:
            self.xmpp['xep_0030'].del_feature(
                    feature='%s#%s' % (Headers.namespace, header))

    def session_bind(self, jid):
        self.xmpp['xep_0030'].add_feature(Headers.namespace)
        for header in self.supported_headers:
            self.xmpp['xep_0030'].add_feature('%s#%s' % (
                Headers.namespace,
                header))