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# Copyright (C) 2018 Philipp Hörist <philipp AT hoerist.com>
#
# This file is part of nbxmpp.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 3
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; If not, see <http://www.gnu.org/licenses/>.
import logging
from nbxmpp.protocol import NS_DELAY2
from nbxmpp.structs import StanzaHandler
from nbxmpp.modules.date_and_time import parse_datetime
log = logging.getLogger('nbxmpp.m.delay')
class Delay:
def __init__(self, client):
self._client = client
self.handlers = [
StanzaHandler(name='message',
callback=self._process_message_delay,
ns=NS_DELAY2,
priority=15),
StanzaHandler(name='presence',
callback=self._process_presence_delay,
ns=NS_DELAY2,
priority=15)
]
def _process_message_delay(self, _con, stanza, properties):
if properties.is_muc_subject:
# MUC Subjects can have a delay timestamp
# to indicate when the user has set the subject,
# the 'from' attr on these delays is the MUC server
# but we treat it as user timestamp
jids = [properties.jid.getBare(),
properties.jid.getDomain()]
properties.user_timestamp = parse_delay(stanza, from_=jids)
else:
if properties.from_muc:
# Some servers use the MUC JID, others the domain
jids = [properties.jid.getBare(),
properties.jid.getDomain()]
else:
jids = [self._client.get_bound_jid().getDomain()]
server_delay = parse_delay(stanza, from_=jids)
if server_delay is not None:
properties.has_server_delay = True
properties.timestamp = server_delay
properties.user_timestamp = parse_delay(stanza, not_from=jids)
@staticmethod
def _process_presence_delay(_con, stanza, properties):
properties.user_timestamp = parse_delay(stanza)
def parse_delay(stanza, epoch=True, convert='utc', from_=None, not_from=None):
'''
Returns the first valid delay timestamp that matches
:param epoch: Returns the timestamp as epoch
:param convert: Converts the timestamp to either utc or local
:param from_: Matches only delays that have the according
from attr set
:param not_from: Matches only delays that have the according
from attr not set
'''
delays = stanza.getTags('delay', namespace=NS_DELAY2)
for delay in delays:
stamp = delay.getAttr('stamp')
if stamp is None:
log.warning('Invalid timestamp received: %s', stamp)
log.warning(stanza)
continue
delay_from = delay.getAttr('from')
if from_ is not None:
if delay_from not in from_:
continue
if not_from is not None:
if delay_from in not_from:
continue
timestamp = parse_datetime(stamp, check_utc=True,
epoch=epoch, convert=convert)
if timestamp is None:
log.warning('Invalid timestamp received: %s', stamp)
log.warning(stanza)
continue
return timestamp
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