"""
    Slixmpp: The Slick XMPP Library
    Copyright (C) 2010  Nathanael C. Fritz
    This file is part of Slixmpp.

    See the file LICENSE for copying permission.
"""

from collections import OrderedDict
from slixmpp.xmlstream import StanzaBase


class StreamFeatures(StanzaBase):

    """
    """

    name = 'features'
    namespace = 'http://etherx.jabber.org/streams'
    interfaces = {'features', 'required', 'optional'}
    sub_interfaces = interfaces
    plugin_tag_map = {}
    plugin_attrib_map = {}

    def setup(self, xml):
        StanzaBase.setup(self, xml)
        self.values = self.values

    def get_features(self):
        """
        """
        features = OrderedDict()
        for (name, lang), plugin in self.plugins.items():
            features[name] = plugin
        return features

    def set_features(self, value):
        """
        """
        pass

    def del_features(self):
        """
        """
        pass

    def get_required(self):
        """
        """
        features = self['features']
        return [f for n, f in features.items() if f['required']]

    def get_optional(self):
        """
        """
        features = self['features']
        return [f for n, f in features.items() if not f['required']]