CODEWITHSUNDEEP
gogoogle-calendar-apiicalendar
Sahith Vibudhi
Sahith Vibudhi

Reputation: 5225

How to remove user from Attendee list in .ics?

I am using .ics file to send calendar invite to google users from my app, when a user is removed from the attendees in my app,

however, the removed attendees are still showing in the event for other users.

how do I remove attendees from event using ICS?

first .ics:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:MyDemoApp
METHOD:REQUEST
BEGIN:VEVENT
UID:useremovetest1jdfshsdpfh
SEQUENCE:0
CREATED:20191014T085551Z
DTSTAMP:20191014T085551Z
LAST-MODIFIED:20191014T085551Z
DTSTART:20191014T112347Z
DTEND:20191014T113547Z
SUMMARY:user remove test - 2
LOCATION:@my-dev-env
DESCRIPTION:some dummy desc 
ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT;RSVP=
 true:mailto:[email protected]
ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT;RSVP=
 true:mailto:[email protected]
ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT;RSVP=
 true:mailto:[email protected]
ORGANIZER;CN=Invitation - user remove test - 2:[email protected]
END:VEVENT
END:VCALENDAR

.ics when a attendee is removed:

BEGIN:VCALENDAR
VERSION:2.0
PRODID:MyDemoApp
METHOD:REQUEST
BEGIN:VEVENT
UID:useremovetest1jdfshsdpfh
SEQUENCE:0
CREATED:20191014T085422Z
DTSTAMP:20191014T085422Z
LAST-MODIFIED:20191014T085422Z
DTSTART:20191014T112347Z
DTEND:20191014T113547Z
SUMMARY:user remove test - 2
LOCATION:@my-dev-env
DESCRIPTION:some dummy desc - update
ATTENDEE;ROLE=REQ-PARTICIPANT;RSVP=true;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-AC
 TION:mailto:[email protected]
ATTENDEE;CUTYPE=INDIVIDUAL;PARTSTAT=NEEDS-ACTION;ROLE=REQ-PARTICIPANT;RSVP=
 true:mailto:TION:mailto:[email protected]
ORGANIZER;CN=Invitation - user remove test - 2:[email protected]
END:VEVENT
END:VCALENDAR

[email protected] still stays in the attendee list. however, title, desc etc are updating successfully.

Upvotes: 2

Views: 1264

Answers (1)

Arnaud Quillaud
Arnaud Quillaud

Reputation: 4645

It looks like your DTSTAMP and LAST-MODIFIED values are "backward" in the sense that the updated invite has an earlier timestamp than the original one.

First invite:

DTSTAMP:20191014T085551Z

Updated invite:

DTSTAMP:20191014T085422Z

As a consequence this second ics is likely to be ignored by clients as per https://www.rfc-editor.org/rfc/rfc5546#section-2.1.5

Upvotes: 1

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