Send notifications when a user tries to book a already booked room/resource

[perkaby]

Is your feature request related to a problem? Please describe.

Hi,

We use the room resource to book meeting rooms. When using the web client in nextcloud the users can only book a resource if it is available and the event in the resource calendar will accept the invitation (showing a checkmark in the users calendar). However if a user adds a resource via CalDAV (In apple Calendar for example) it is possible to book a resource that is already booked, leading to double bookings. Also when booking from CalDAV the event in the resource calendar will stay in the "Invitation will be sent" status and show a ? in the users calendars.

Describe the solution you'd like

When booking from CalDAV the resource should be automatically accepted if the resource is available. If the resource is already booked the system should decline it and send out a notification about it to the user to avoid double bookings.

Describe alternatives you've considered

No response

Additional context

No response

[st3iny]

Thank you for the suggestion.

Refreshing/resyncing the event should show the room as declined in case a double booking is attempted.

But I agree that this is cumbersome. We could send notifications/emails in this case to notify a user right away.

[perkaby]

I am not sure if it is our setup, but when a users adds a room resource with Apple Calendar (connected via WebDAV), the room status never updates on the server. So there is no accept or declined status updated to the event or in the users calendar.

Checking in the nextcloud web calendar these rooms have "Availability will be checked" as the status.

[st3iny]

There might currently be a bug in the booking logic.

See also #192