Mail: Create event or task from email

[ChristophWurst]

Feature Request

As a user I want to create a calendar event or task from an email like other email solutions offer. The subject will be the event name. Ideally there will be a component from calendar that allows the user to edit props directly instead of having default values sent directly to the user's calendar. As an interim solution we can just create the event and deep link to calendar for edits if the app is available.

Summary

Add an action to envelopes/messages that allows the user to create an event or task.

This is not available in all clients, hence not tagging as feature parity.

[ChristophWurst]

Ideally there will be a component from calendar that allows the user to edit props directly instead of having default values sent directly to the user's calendar. As an interim solution we can just create the event and deep link to calendar for edits if the app is available.

cc @georgehrke for brainstorming :)

[georgehrke]

The interim solution will definitely work.

I like the idea of a calendar-component. We should probably think about a general way for inter-app-components. In the calendar app, there are also cases where we could use a "compose email" component. (https://github.com/nextcloud/calendar/issues/1529)

I'm just worried that those components could get really big. The calendar one will have to bundle both calendar-js and cdav-library.

[jakobroehrl]

It would be nice to create a deck card of a mail, too.