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Add support for Calendar events (iCalendar vEvent) #138

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sven-geisenhainer opened this issue Apr 25, 2018 · 7 comments
Closed

Add support for Calendar events (iCalendar vEvent) #138

sven-geisenhainer opened this issue Apr 25, 2018 · 7 comments

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@sven-geisenhainer
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sven-geisenhainer commented Apr 25, 2018

Hi and thanks a lot for this great library!

My feature request: I would like to use Simple Java Mail to send calendar invitations, which have to smoothly integrate with Gmail/Google calendar and MS Outlook but should also get properly displayed in any ordinary client. This means I have to create multipart/alternative messages consisting of 3! alternatives: text/plain, text/html and text/calendar - at least MS Outlook is sending such invitations. Simply adding the ICS as attachment does not work with Outlook.

I found no way how to do this with Simple Java Mail, e.g. there is no setTextVCalendar() or addCustomText(String text, String mimeType).

What do you think?

@bbottema
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Hi @sven-mvolution, that's a good point! I will think about a proper solution.

@bbottema bbottema added this to the 6.0.0 milestone May 24, 2018
@bbottema
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bbottema commented Jun 1, 2018

I've been trying to create a MimeMessage by hand with an ical event in it using ical4j, but I've been unable to get gMail or Outlook to cooperate with me. It keeps seeing it as a simple attachment.

I'll keep playing around.

@sven-geisenhainer
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Hi @bbottema - thanks for further investigating and considering this a useful enhancement!
Meanwhile I've locally changed your lib to suit my needs as follows - but of course still waiting for the "official" support ;)

  • Add support for a optional text/calendar alternative
  • Use 2051 test port and made unit test work
    See the attached patch file (diff against 5.0.3)
    calendar-alternative.patch.txt

@bbottema
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bbottema commented Jun 1, 2018

Some how Simple Java Mail manages the bodyparts better than when I do it manually :D

It works in Outlook 365 for me, but gMail still refused and only displays it as an attachment. I wonder if it even still works at all in gMail.

@bbottema bbottema changed the title Create multipart/alternative message consisting of 3 (or more) alternatives Add support for Calendar events (iCalendar vEvent) Jun 1, 2018
bbottema added a commit that referenced this issue Jun 1, 2018
bbottema added a commit that referenced this issue Jun 1, 2018
@bbottema
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bbottema commented Jun 1, 2018

Implemented for the 6.0.0 release.

Usage is simple:

// Create a Calendar with something like ical4j
Calendar icsCalendar = new Calendar();
icsCalendar.getProperties().add(new ProdId("-//Events Calendar//iCal4j 1.0//EN"));
icsCalendar.getProperties().add(Version.VERSION_2_0);

(..) // add attendees, organizer, end/start date and whatever else you need

// Produce calendar string
ByteArrayOutputStream bOutStream = new ByteArrayOutputStream();
new CalendarOutputter().output(icsCalendar, bOutStream);
String yourICalEventString = bOutStream.toString("UTF-8")

// Let Simple Java Mail handle the rest
currentEmailBuilder
    .withCalendarText(CalendarMethod.REQUEST, yourICalEventString)

Thanks for the help @sven-mvolution!

@bbottema
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Released in 6.0.0-rc1.

@bbottema
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6.0.0 has released as well, finally.

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