# Slixmpp: The Slick XMPP Library
# Copyright (C) 2012 Nathanael C. Fritz, Lance J.T. Stout
# This file is part of Slixmpp.
# See the file LICENSE for copying permission.
from slixmpp.xmlstream import ElementBase


class Signed(ElementBase):
    name = 'x'
    namespace = 'jabber:x:signed'
    plugin_attrib = 'signed'
    interfaces = {'signed'}
    is_extension = True

    def set_signed(self, value):
        parent = self.parent()
        xmpp = parent.stream
        data = xmpp['xep_0027'].sign(value, parent['from'])
        if data:
            self.xml.text = data
        else:
            del parent['signed']

    def get_signed(self):
        return self.xml.text


class Encrypted(ElementBase):
    name = 'x'
    namespace = 'jabber:x:encrypted'
    plugin_attrib = 'encrypted'
    interfaces = {'encrypted'}
    is_extension = True

    def set_encrypted(self, value):
        parent = self.parent()
        xmpp = parent.stream
        data = xmpp['xep_0027'].encrypt(value, parent['to'])
        if data:
            self.xml.text = data
        else:
            del parent['encrypted']

    def get_encrypted(self):
        parent = self.parent()
        xmpp = parent.stream
        if self.xml.text:
            return xmpp['xep_0027'].decrypt(self.xml.text, parent['to'])
        return None