Room upgrade to room with different settings

[benparsons]

Is your suggestion related to a problem? Please describe.
I have a room which is encrypted, and contains several users who are less comfortable with technology. I need to upgrade the room, and would like to be able to send an upgrade notice. However, the room population has grown, and I would prefer for my new room to no longer use e2e.

Describe the solution you'd like
When I perform /upgraderoom x, an additional, optional flag to make different settings in the new room, specifically encryption.

Describe alternatives you've considered
I could craft my own tombstone event and use that, per https://matrix.org/docs/spec/client_server/latest#m-room-tombstone.

[t3chguy]

/upgraderoom x is just a wrapper around https://matrix.org/docs/spec/client_server/r0.6.1#post-matrix-client-r0-rooms-roomid-upgrade with optional inviting. Having additional code to manually handle room upgrade emission seems a bit duplicative and strange and will likely fall out of sync with the spec whenever the list of events to copy ever changes causing mismatched behaviour depending on which client you use to upgrade a room

[pilot51]

I recently upgraded an unencrypted room on my homeserver and the new room had encryption. There was no warning about that in the upgrade dialog and I didn't want it because I was planning to add a bridge to the room, which wouldn't work properly with encryption. I had to create a whole new room to disable encryption again.

The option to choose whether the upgraded room has encryption would be ideal, but absent that, all of the settings from the old room should be carried over including encryption.

[t3chguy]

@pilot51 as above, all of the upgrade behaviour is handled by the server, not Element Web.
Element just called the upgrade API https://matrix.org/docs/spec/client_server/r0.6.1#post-matrix-client-r0-rooms-roomid-upgrade

[pilot51]

@t3chguy Sorry, I must have been too tired and/or rushed to comprehend what I was reading and posted anyway because I just wanted to vent. I should have slept on it.

Here's the issue for Synapse: matrix-org/synapse#9246