[Tickets #3352] NEW: DTSTART appearing alone causes errors

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Ticket URL: http://bugs.horde.org/ticket/?id=3352
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 Ticket             | 3352
 Created By         | stpierre at nebrwesleyan.edu
 Summary            | DTSTART appearing alone causes errors
 Queue              | Kronolith
 Version            | 2.1-RC1
 State              | Unconfirmed
 Priority           | 1. Low
 Type               | Bug
 Owners             | 
+New Attachment     | sample-event.ics
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stpierre at nebrwesleyan.edu (2006-01-27 13:18) wrote:

Sun's Calendar Express exports calendars in iCalendar format, and some
repeating events appear to only have a DTSTART tag, no DTEND tag.  When this
happens, the DTSTART tag always has the parameter VALUE=DATE.  I've attached
a sample event from a real calendar that shows this. When trying to import a
calendar with such an event, Kronolith errors out.

The iCalendar standard isn't crystal clear on whether or not this is okay,
but the RFC does contain an example where it apperas that there is no DTEND
tag, which suggests that Sun's Calendar does the right thing and Horde does
not.  The example from RFC 2445:

 Example: The following is an example of the "VJOURNAL" calendar
   component:

     BEGIN:VJOURNAL
     UID:19970901T130000Z-123405 at host.com
     DTSTAMP:19970901T1300Z
     DTSTART;VALUE=DATE:19970317
     SUMMARY:Staff meeting minutes
     DESCRIPTION:1. Staff meeting: Participants include Joe\, Lisa
       and Bob. Aurora project plans were reviewed. There is currently
       no budget reserves for this project. Lisa will escalate to
       management. Next meeting on Tuesday.\n
       2. Telephone Conference: ABC Corp. sales representative called
       to discuss new printer. Promised to get us a demo by Friday.\n
       3. Henry Miller (Handsoff Insurance): Car was totaled by tree.
       Is looking into a loaner car. 654-2323 (tel).
     END:VJOURNAL

(From page 56.)

Using the SQL driver, the error happens on line 784:

783>       // Event end.
784>        $this->_properties['event_end'] = date('Y-m-d H:i:s',
$this->end->timestamp());

The call to a method $this->end errors out because there is no end
explicitly specified.