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from __future__ import annotations
from typing import TYPE_CHECKING
from nbxmpp.errors import MalformedStanzaError
from nbxmpp.modules.base import BaseModule
from nbxmpp.modules.util import finalize
from nbxmpp.modules.util import raise_if_error
from nbxmpp.namespaces import Namespace
from nbxmpp.protocol import JID
from nbxmpp.protocol import Message
from nbxmpp.protocol import Node
from nbxmpp.protocol import NodeProcessed
from nbxmpp.structs import MDSData
from nbxmpp.structs import MessageProperties
from nbxmpp.structs import StanzaHandler
from nbxmpp.task import iq_request_task
if TYPE_CHECKING:
from nbxmpp.client import Client
MDS_OPTIONS = {
"pubsub#persist_items": "true",
"pubsub#max_items": "max",
"pubsub#send_last_published_item": "never",
"pubsub#access_model": "whitelist",
}
class MDS(BaseModule):
"""
XEP-0490
"""
_depends = {"publish": "PubSub"}
def __init__(self, client: Client) -> None:
BaseModule.__init__(self, client)
self._client = client
self.handlers = [
StanzaHandler(
name="message",
callback=self._process_pubsub_mds,
ns=Namespace.PUBSUB_EVENT,
priority=16,
),
]
def _process_pubsub_mds(
self, _client: Client, stanza: Message, properties: MessageProperties
) -> None:
if not properties.is_pubsub_event:
return
if properties.pubsub_event.node != Namespace.MDS:
return
item = properties.pubsub_event.item
if item is None:
return
try:
data = self._parse_item(item)
except MalformedStanzaError as error:
self._log.warning(error)
self._log.warning(stanza)
raise NodeProcessed
pubsub_event = properties.pubsub_event._replace(data=data)
self._log.info("Received MDS: %s", data)
properties.pubsub_event = pubsub_event
@iq_request_task
def set_mds(self, jid: JID, stanza_id: str, by: JID | None = None):
task = yield
if by is None:
own_jid = self._client.get_bound_jid()
assert own_jid is not None
by = own_jid.new_as_bare()
displayed = Node("displayed", {"xmlns": Namespace.MDS})
displayed.addChild(
"stanza-id", namespace=Namespace.SID, attrs={"id": stanza_id, "by": str(by)}
)
result = yield self.publish(
Namespace.MDS,
displayed,
id_=str(jid),
options=MDS_OPTIONS,
force_node_options=True,
)
yield finalize(task, result)
@iq_request_task
def get_mds(self):
task = yield
items = yield self.request_items(Namespace.MDS)
raise_if_error(items)
if not items:
yield task.set_result(None)
data: list[MDSData] = []
for item in items:
try:
data.append(self._parse_item(item))
except MalformedStanzaError as error:
self._log.warning(error)
self._log.warning(item)
yield data
def _parse_item(self, item: Node) -> MDSData:
item_id = item.getAttr("id")
try:
jid = JID.from_string(item_id)
except Exception as e:
raise MalformedStanzaError(
f'MDS item ID "{item_id}" is not a valid JID: {e}', item
)
displayed = item.getTag("displayed", namespace=Namespace.MDS)
if not displayed:
raise MalformedStanzaError("Bad MDS event (no displayed tag)", item)
sid = displayed.getTag("stanza-id", namespace=Namespace.SID)
if sid is None:
raise MalformedStanzaError("Bad MDS event (no stanza-id tag)", item)
stanza_id = sid.getAttr("id")
if not stanza_id:
raise MalformedStanzaError("Bad MDS event (no stanza-id ID)", item)
by = sid.getAttr("by")
try:
stanza_id_by = JID.from_string(by)
except Exception as e:
raise MalformedStanzaError(
f'MDS stanza-id by "{by}" is not a valid JID: {e}', item
)
return MDSData(jid=jid, stanza_id=stanza_id, stanza_id_by=stanza_id_by)
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