Previously we only queried the device list when the user joined the room; now we
do it when they are invited too. This means that new messages can be encrypted
for the devices of the invited user as of the point they were invited.
WARNING: This commit has two major problems however:
1. If the invited user adds devices after being invited but before joining, the
device-list will not be updated to the other servers in the room (as we don't
know who those servers are).
2. This introduces a regression, as previously the device-list would be correctly
updated when when user joined the room. However, this resync doesn't happen
now, so devices which joined after the invite and before the join may never
be added to the device-list.
This is being merged for DINSIC given the edge case of adding devices between
invite & join is pretty rare in their use case, but before it can be merged to
synapse in general we need to at least re-sync the devicelist when the user joins
or to implement some kind of pubsub mechanism to let interested servers subscribe
to devicelist updates on other servers irrespective of user join/invite membership.
This was originally https://github.com/matrix-org/synapse/pull/3484
Most rooms have a trivial history visibility like "shared" or
"world_readable", especially large rooms, so lets not bother getting the
full membership of those rooms in that case.
when there is no `m.room.power_levels` event in force in the room. (PR #3397)
Discussion around the Matrix Spec change proposal for this change can be
followed at https://github.com/matrix-org/matrix-doc/issues/1304.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1
iQEcBAABAgAGBQJbIop9AAoJEIofk9V1tejV9lsIAJVH0l5dXROmy1KH/zt16AUA
CXa6Vv4Vyo6hKad/fZ81OZVRr5ChK/TvbIJVn/SA/muCfdoIFdxhT8eo/pXzO2UW
zReuLsDhAg+gSvpNus37oWj2FVsAE1HYDZ60lfaapAdZnkFit68d5DQZjO6nZHHA
YUXcU3GUwj0ZYuUzFzYKMLu6uNNasNkN8h6SS2lF7Bm4JaKDW+mFMfCyJwdIVSEh
BGhHoVpXdxFysD9s6Mwxqrz3KKg1Jtp7idDkk0x2S2Eh+gxyiDQQokv0oQ3+0+HG
sgy5Iz2t2CkpS02/j+LOvAZljTmnD0bXu3srGR+25StsoDFP038Am3bfQwtD190=
=9jsT
-----END PGP SIGNATURE-----
Merge tag 'v0.31.2' into dinsic
