# Slixmpp: The Slick XMPP Library
# Copyright (C) 2010 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permission.
import logging

import slixmpp
from slixmpp.plugins.xep_0030 import StaticDisco


log = logging.getLogger(__name__)


class StaticExtendedDisco(object):

    """
    Extend the default StaticDisco implementation to provide
    support for extended identity information.
    """

    def __init__(self, static):
        """
        Augment the default XEP-0030 static handler object.

        Arguments:
            static -- The default static XEP-0030 handler object.
        """
        self.static = static

    def set_extended_info(self, jid, node, ifrom, data):
        """
        Replace the extended identity data for a JID/node combination.

        The data parameter may provide:
            data -- Either a single data form, or a list of data forms.
        """
        self.del_extended_info(jid, node, ifrom, data)
        self.add_extended_info(jid, node, ifrom, data)

    def add_extended_info(self, jid, node, ifrom, data):
        """
        Add additional extended identity data for a JID/node combination.

        The data parameter may provide:
            data -- Either a single data form, or a list of data forms.
        """
        self.static.add_node(jid, node)

        forms = data.get('data', [])
        if not isinstance(forms, list):
            forms = [forms]

        info = self.static.get_node(jid, node)['info']
        for form in forms:
            info.append(form)

    def del_extended_info(self, jid, node, ifrom, data):
        """
        Replace the extended identity data for a JID/node combination.

        The data parameter is not used.
        """
        if self.static.node_exists(jid, node):
            info = self.static.get_node(jid, node)['info']
            for form in info['substanza']:
                info.xml.remove(form.xml)