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import logging
import base64
import hashlib
from xml.etree import cElementTree as ET
from sleekxmpp.xmlstream.stanzabase import ElementBase, register_stanza_plugin
from sleekxmpp.plugins import base
from sleekxmpp.xmlstream.handler.callback import Callback
from sleekxmpp.xmlstream.matcher.xpath import MatchXPath
from sleekxmpp.stanza.iq import Iq
from object import Object
from permission import PermissionError
class AliasQuery(ElementBase):
namespace = 'alias:query'
name = 'query'
plugin_attrib = 'alias'
interfaces = set(('node', 'type', 'items', 'object'))
sub_interfaces = set(('items'))
def addItem(self, node, permission = None):
item = AliasItem(None, self)
item['node'] = node
if permission is not None:
item['permission'] = str(permission)
class AliasItem(ElementBase):
namespace = 'alias:query'
name = 'item'
plugin_attrib = 'item'
interfaces = set(('node', 'permission'))
class AliasPlugin(base.base_plugin):
def plugin_init(self):
self.description = 'Plugin to handle alias queries'
register_stanza_plugin(Iq, AliasQuery)
query_parser = MatchXPath('{{{}}}iq/{{{}}}query'.format(self.xmpp.default_ns,
AliasQuery.namespace))
self.xmpp.register_handler(Callback('Alias queries', query_parser,
self.handle_alias_query))
def post_init(self):
base.base_plugin.post_init(self)
self.xmpp.plugin['xep_0030'].add_feature("alias:query")
def handle_alias_query(self, iq):
try:
callee = base64.b64decode(iq['to'].user)
except TypeError:
logging.error("callee field not base64 encoded")
caller = iq['from'].bare
node = iq['alias']['node']
if not node:
node = hashlib.sha1(callee).hexdigest()
node = Object(callee, node)
if iq['alias']['type'] == 'items':
logging.debug('childs of {} requested'.format(node))
childs = Object.get_child_list(node, caller)
reply = AliasQuery()
reply['node'] = node.hash
reply['type'] = 'items'
for name, perm in childs:
reply.addItem(name, perm)
iq.reply().set_payload(reply).send()
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