Clear the notification when the message is read elsewhere

[manuroe]

Since iOS 13 and the notification extension service, it is harder to make the app synchronise in the background with the server, which is the best to respect user privacy. This makes the support of this feature harder.

For the moment, notifications are cleared only when they have been all read. In this case, the server send a badge count of 0 and we can clear all of them.

We need to find a way to resurrect this feature post iOS13.

[manuroe]

For reference, a PR in EA that fixed it: https://github.com/vector-im/element-android/pull/2086

[AverageMarcus]

For the moment, notifications are cleared only when they have been all read. In this case, the server send a badge count of 0 and we can clear all of them.

It seems that this has recently stopped working. I'm not sure when exactly but since roughly the start of December 2023 I no longer have notifications cleared on my iPhone when I have read everything using Element Web.

Element Version: 1.11.5 iOS version: 17.2.1 Synapse version: v1.98.0

Unfortunately I'm not sure if this is an issue with Element-ios or with Synapse.