delete chat messages - still visible to 3rd party despite `cleared the history..` indicator

[gerbrent]

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Steps to reproduce

1. Have a rich, 2+ sided text conversation w many messages.

2. User1 (w privileges) chooses to **Delete chat messages - Permanently Delete all messages in this conversation!"
   

3. User2 sees "User1 cleared the history of the conversation", yet no messages are cleared or deleted - all messages remain visible.

Expected behaviour

Expect all messages for User2 to vanish immediately following User1 choosing to delete all chat messages.

Actual behaviour

User2 sees "User1 cleared the history of the conversation", yet no messages are cleared or deleted - all messages remain visible.
EVEN IF the conversation is reloaded (i.e. within Talk, move to a different conversation, then return).
Only once User2 moves away from Talk (either selecting a different Nextcloud app, or reloads the page) do the messages vanish.

Talk app

Talk app version: (see apps admin page: /index.php/settings/apps)
17.1.0-rc.1

Custom Signaling server configured: yes/no and version (see additional admin settings: /index.php/index.php/settings/admin/talk#signaling_server)

Custom TURN server configured: yes/no (see additional admin settings: /index.php/settings/admin/talk#turn_server)

Custom STUN server configured: yes/no (see additional admin settings: /index.php/settings/admin/talk#stun_server)

Browser

Microphone available: yes/no

Camera available: yes/no

Operating system: Windows/Ubuntu/...
Linux openSUSE Tumbleweed

Browser name: Firefox/Chrome/...
Firefox

Browser version: 85/96/...
116.0.2

Browser log

Details

``` Insert your browser log here, this could for example include: a) The javascript console log b) The network log c) ... ```

Server configuration

Nextcloud's internal tech preview instance 😎
Nextcloud Hub 6 (27.1.0 beta 2)

Operating system: Ubuntu/RedHat/...

Web server: Apache/Nginx

Database: MySQL/Maria/SQLite/PostgreSQL

PHP version: 8.0/8.1/8.2

Nextcloud Version: (see admin page)

List of activated apps:

Details

If you have access to your command line run e.g.:
sudo -u www-data php occ app:list
from within your server installation folder

Nextcloud configuration:

Details

If you have access to your command line run e.g.:
sudo -u www-data php occ config:list system
from within your Nextcloud installation folder

Server log (data/nextcloud.log)

Details

Insert your server log here

[gerbrent]

[nickvergessen]

@Antreesy I guess some event handling was removed by accident?

[Antreesy]

I guess some event handling was removed by accident?

Nope, we never handle it 👀 But should be around 5 lines of code