Send automatic email when a user signed up for a task with an attached ical file

[Doca]

Is your idea or feature request related to a problem? Please describe.
As a volunteer I want to have an email confirmation for which shift and task I signed up. Then I don't need to log into volunteer-planner again if I want to look up the place and date again. The ical entry helps me to not forget my shift.
In the email the following Information would be helpful:

• Facilityname
• Taskname
• Place Address
• Shift starting_time and ending_time

Describe the solution you'd like
The system should send an Email to the volunteer after signing up for a task. In the email there should be an ical file for easy adding it to a calendar.

Email Text Draft
Hello {{user}},

You just signed up for the following task: {{Taskname}}.
Your shift begins at {{starting_time}} and ends at {{ending_time}}.
The facility {{facility name}} you will find at the following address:

{{ Address of the place}}

If you can't make it please unsubscribe your task at the volunteer-planner.org
Your Volunteer-Planner Team

[pitpalme]

Message text should be fetched from translation, so it's send localized according to user preference.

[pitpalme]

iCal attachment obsolete by #558?

[christophmeissner]

iCal attachment obsolete by #558?

No, I don't think so. I would keep it in the confirmation emails as an event invitation for everybody, but we need to make sure, that the UUIDs of the events match, to prevent duplications when the user has in fact subscribed to the ics feed and accepts the attached invitations.

[Doca]

To to be clear on the unique prodid for the ical file. I would create a new property in the shift model which returns a unique prodid for the shift. Basically i would generate a string from base64(domainname+shift-id) which is easy to deal with.

[christophmeissner]

I'm not sure about the prodid of an ical feed, but I think that is a property of an entire calendar, which would be sth like the URL of calendar feed (eg. https://www.volunteer-planner.org/user/123/shifts/calendar.ics). I was talking about event ids for individual calendar events (VEVENT > UID) which would appear in the personal calendar feed for a specific user (ie. per user.account) and per event (ie. per ShiftHelper?). A UUID is a standardized way of generating universal unique identifiers.