[PHPiCalendar-DEV] COUNT

[Jim Hu <ji...@ta...>]

Been a while since I've emailed the list...but I've been trying to  
get time to do another bug fix release and I've run into something  
where I could use some thoughts on how to fix it.  I was working on  
this bug:

https://sourceforge.net/tracker/? 
func=detail&atid=500017&aid=1554268&group_id=62270

This is a case where the problematic event is:

BEGIN:VEVENT
RRULE:FREQ=WEEKLY;INTERVAL=1;COUNT=2;BYDAY=TU,TH;WKST=SU
DURATION:PT1H
DTSTAMP:20060907T173732Z
UID:F6E3F1E5-3E8D-11DB-AFA8-000D93B8CD32
SEQUENCE:7
DTSTART;TZID=America/Denver:20060907T110000
SUMMARY:tue thurs
ORGANIZER;CN="scott schmitz":mailto:sc...@re...
END:VEVENT

The problem is that this displays the first Thurs instance correctly,  
but not the next Tuesday.  Looking at the code for ical_parser.php,  
it seems to me like $count is counting the number of days, weeks,  
months, or years in a repeat, not the number of times the event  
itself is repeating.  If I'm right, then I think a major change to  
the parser is needed.  As it stands, $count shows up at the beginning  
of the big while loop that handles END:VEVENT in:

======
while (($next_range_time >= $start_range_time_tmp) &&  
($next_range_time <= $end_range_time_tmp) && ($count_to != $count)) {
	$func = $freq_type.'Compare';
	$diff = $func(date('Ymd',$next_range_time), $start_date);
	if ($diff < $count) {
		....
======
The $freq_type.'Compare' functions are in date_functions.php.  These  
just return the number of days, weeks, etc. between two dates.  There  
are a bunch of ways this can fail to work, for example, if

RRULE:FREQ=WEEKLY;INTERVAL=1;COUNT=2;BYDAY=MO,TU,WE,TH,FR;WKST=SU

The calendar should only show the occurrences on MO and TU...but it  
will show all of them in the one week.  Any thoughts?

Jim


=====================================
Jim Hu
Associate Professor
Dept. of Biochemistry and Biophysics
2128 TAMU
Texas A&M Univ.
College Station, TX 77843-2128
979-862-4054