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Include heroes in partial join responses' state (#14442)

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* Pull out hero selection logic

* Include heroes in partial join response's state

* Changelog

* Fixup trial test

* Remove TODO
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David Robertson 2022-11-15 17:35:19 +00:00 • committed by GitHub
parent 258b5285b6
commit 1eed795fc5
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5 changed files with 60 additions and 25 deletions
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30
synapse/storage/databases/main/roommember.py
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@ -1517,6 +1517,36 @@ class RoomMemberStore(
await self.db_pool.runInteraction("forget_membership", f)
def extract_heroes_from_room_summary(
details: Mapping[str, MemberSummary], me: str
) -> List[str]:
"""Determine the users that represent a room, from the perspective of the `me` user.
The rules which say which users we select are specified in the "Room Summary"
section of
https://spec.matrix.org/v1.4/client-server-api/#get_matrixclientv3sync
Returns a list (possibly empty) of heroes' mxids.
"""
empty_ms = MemberSummary([], 0)
joined_user_ids = [
r[0] for r in details.get(Membership.JOIN, empty_ms).members if r[0] != me
]
invited_user_ids = [
r[0] for r in details.get(Membership.INVITE, empty_ms).members if r[0] != me
]
gone_user_ids = [
r[0] for r in details.get(Membership.LEAVE, empty_ms).members if r[0] != me
] + [r[0] for r in details.get(Membership.BAN, empty_ms).members if r[0] != me]
# FIXME: order by stream ordering rather than as returned by SQL
if joined_user_ids or invited_user_ids:
return sorted(joined_user_ids + invited_user_ids)[0:5]
else:
return sorted(gone_user_ids)[0:5]
@attr.s(slots=True, auto_attribs=True)
class _JoinedHostsCache:
"""The cached data used by the `_get_joined_hosts_cache`."""