Switch Contacts backend

[jancborchardt]

With 9.0 the Contacts/CardDAV backend moved into core. So for the »show Contacts on map« feature to work, we need to switch the endpoint around. @v1r0x

@DeepDiver1975 @Henni what needs to be done?

Also then for the markers we can show the new color+letter placeholders which @skjnldsv updated: https://github.com/owncloud/core/pull/23638

[v1r0x]

Should we drop OC8 support or try to use the new contacts backend and fallback to the old one if the new doesn't exist?

[jancborchardt]

I’d say dropping ownCloud 8.* support is totally fine. The app is in very early stages, so any time spent for backwards compatibility is wasted atm.

[skjnldsv]

Agreed :)

[v1r0x]

Ok, then we (in this case we means @Henni :D) should use the new backend and drop oc8 support. I think (or rather hope) that we only have to fix these lines: https://github.com/owncloud/maps/blob/master/js/script.js#L1100 https://github.com/owncloud/maps/blob/master/js/script.js#L1110 https://github.com/owncloud/maps/blob/master/js/script.js#L1291 https://github.com/owncloud/maps/blob/master/js/script.js#L1589-L1594

[e-alfred]

This would be quite a nice fix, because contacts now do not work on OC 9.0 at all.

[v1r0x]

Absolutely! I think @Henni (new contacts app dev) has a lot of work with the said app, but maybe he knows what to do?