Usecase suggestion: CalDAV storage sync (or import)

[jonassmedegaard]

Inspired by issue #227 it would be useful to support synchronizing with (or at least import from) CalDAV storage.

• parse SUMMARY and DESCRIPTION as CommonMark (maybe only optionally)

This would enable use of e.g. the Android app Tasks - and a range of other freely licensed decentral groupware tools.

[jonassmedegaard]

Since it seems CalDAV protocol lacks a (maintained!) implementation in Rust, a simpler approach might be to support parsing and/or writing (preferably both) iCalendar format files (a.k.a. ical or ics).

Then a separate tool - vdirsyncer - could be used to synchronize those files with a CalDAV storage.

[joepio]

There are two approaches for doing this in the current atomic stack: in the front-end (typescript + browser) or in the server (rust).

• Manually import all calendar items (i think browser only)
• Keep items in sync (server only)

Server

• [ ] iCal parser (e.g. ical-rs)
• [ ] Sync using OAuth or something.
• [ ] Background worker. Could be quite a big task! #73

Browser

• [ ] JS / TS parser for iCal
• [ ] Map to Atomic Data models
• [ ] Upload from file

What we will always need

• [ ] Create Atomic Properties for all relevant iCal properties.
• [ ] Create Atomic Classes for related iCal models

I'm not planning on making this soon, but I'll definitely help anyone who's willing :)