feat: add a setting for the default calendar url

[st3iny]

Resolves #1835

Based on #2331 and #4310

Closes #2331
Closes #4310

Requires:

• feat: implement updating a principal's schedule-default-calendar-URL cdav-library#871
• feat(dav): update a principal's schedule-default-calendar-URL server#43745

TODO

• Use the default calendar when creating new events
• Fix tests

[codecov]

Codecov Report

Attention: Patch coverage is 2.50000% with 39 lines in your changes are missing coverage. Please review.

Project coverage is 24.13%. Comparing base (5a45f89) to head (7a307bb).
Report is 29 commits behind head on main.

Files	Patch %	Lines
src/components/AppNavigation/Settings.vue	0.00%	25 Missing ⚠️
src/store/principals.js	0.00%	6 Missing ⚠️
src/store/calendarObjects.js	0.00%	4 Missing ⚠️
src/components/Shared/CalendarPicker.vue	0.00%	3 Missing ⚠️
src/store/calendars.js	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##               main    #5790      +/-   ##
============================================
- Coverage     24.19%   24.13%   -0.07%     
  Complexity      423      423              
============================================
  Files           243      243              
  Lines         11005    11038      +33     
  Branches       1824     1833       +9     
============================================
+ Hits           2663     2664       +1     
- Misses         8342     8374      +32     

Flag	Coverage Δ
javascript	15.07% <2.50%> (-0.05%)	⬇️
php	61.97% <ø> (ø)

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[tcitworld]

Since it requires nextcloud/server#43745, shouldn't this only be showed on NC 29+ ?

[st3iny]

Good catch! I'll add a version check.

[ChristophWurst]

Makes sense

[Sebastian-Roth]

Thanks to everyone involved for adding this feature. I just started to use NectCloud Calendar and have exact that situation where I don't want to have the personal calendar as default.

Unfortunately the setting does not work as expected. Not sure if this is the right place to report this but I will give it a go. We use a shared calendar as a group. The calendar was created by the NextCloud admin user and made available to a group of people (group defined in our NextCloud). People see the shared calendar and add events but don't seem to be able to set it as default calendar - see screenshots below. Admin is able to set this shared calendar as default but still is not used on new events.

NextCloud Server version: 30.0.2
NextCloud Calendar version: 5.0.8

1. Issue - default calendar dropdown missing for shared calendar:
   

2. Issue - default calendar set but new events still use the personal calendar as default:
   

[st3iny]

@Sebastian-Roth Thanks for the report. Yes, this is working as intended. Please refer to #5996 and #5942 for some more information.

TL;DR: Some users were confused by the changed default option in the calendar picker as there are some restrictions on which calendars can be picked as the default calendar picker vs in the event calendar picker.

Perhaps someone could investigate if can revert the revert now as the support for shared calendars in the backend has been improved since.

A note for the future: Please open a new ticket and reference related pull requests and tickets there. Posting in PRs pings a lot of (unrelated) people and sometimes is lost as the pull request is already closed and some people might skip the notification. Thanks :)