# 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 ET, ElementBase, JID


class BlockList(ElementBase):
    name = 'blocklist'
    namespace = 'urn:xmpp:blocking'
    plugin_attrib = 'blocklist'
    interfaces = {'items'}

    def get_items(self):
        result = set()
        items = self.xml.findall('{%s}item' % self.namespace)
        if items is not None:
            for item in items:
                jid = JID(item.attrib.get('jid', ''))
                if jid:
                    result.add(jid)
        return result

    def set_items(self, values):
        self.del_items()
        for jid in values:
            if jid:
                item = ET.Element('{%s}item' % self.namespace)
                item.attrib['jid'] = JID(jid).full
                self.xml.append(item)

    def del_items(self):
        items = self.xml.findall('{%s}item' % self.namespace)
        if items is not None:
            for item in items:
                self.xml.remove(item)


class Block(BlockList):
    name = 'block'
    plugin_attrib = 'block'


class Unblock(BlockList):
    name = 'unblock'
    plugin_attrib = 'unblock'