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/* $Id: freebusy.php,v 1.30.2.6 2007/11/12 15:40:31 umcesrjones Exp $
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* Creates the iCal free/busy schedule a single user.
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* Free/busy schedules are specified in the iCal RFC 2445.
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* URL should be the form of /xxx/freebusy.php/username.ifb
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* or /xxx/freebusy.php?user=username
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* Some servers seem to have problem with username.ifb version.
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* If so, they should user the second form.
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* For now, we use a date range of the start of the current
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* month and include one year from there.
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* Rather arbitrary, eh???
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* To read the iCal specification:
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* http://www.ietf.org/rfc/rfc2445.txt
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* WebCalendar does not use freebusy info for scheduling right now.
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* But, this may change in the future.
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* We might want to cache this type of information after a calendar is updated.
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* This would make conflict checking much faster,
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* particularly for events with many participants.
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* Developers/Debugging:
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* You can test this script from the command line if you have the command-line PHP.
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* Create a symbolic link with a valid username,
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* and then invoke the PHP command using the link as a parameter:
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* ln -s freebusy.php cknudsen.ifb
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* Users do need to enable "Enable FreeBusy publishing" in their
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* preferences or this page will generate a "You are not authorized"
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* If $FREEBUSY_ENABLED is not 'Y' (set in each user' Preferences), do not allow.
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include 'includes/translate.php';
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require_once 'includes/classes/WebCalendar.class';
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require_once 'includes/classes/Event.class';
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require_once 'includes/classes/RptEvent.class';
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$WebCalendar =& new WebCalendar ( __FILE__ );
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include 'includes/config.php';
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include 'includes/dbi4php.php';
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include 'includes/formvars.php';
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include 'includes/functions.php';
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$WebCalendar->initializeFirstPhase ();
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include 'includes/' . $user_inc;
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include 'includes/validate.php';
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include 'includes/site_extras.php';
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include 'includes/xcal.php';
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$WebCalendar->initializeSecondPhase ();
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// Calculate username.
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// If using http_auth, use those credentials.
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if ( $use_http_auth && empty ( $user ) )
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if ( empty ( $user ) ) {
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$arr = explode ( '/', $PHP_SELF );
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$user = $arr[count ( $arr )-1];
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# Remove any trailing ".ifb" in user name.
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$user = preg_replace ( '/\.[iI][fF][bB]$/', '', $user );
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if ( $user == 'public' )
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load_global_settings ();
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// Load user preferences (to get the DISPLAY_UNAPPROVED and
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// FREEBUSY_ENABLED pref for this user).
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load_user_preferences ();
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$WebCalendar->setLanguage ();
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// Load user name, etc.
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user_load_variables ( $user, 'publish_' );
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if ( empty ( $FREEBUSY_ENABLED ) || $FREEBUSY_ENABLED != 'Y' ) {
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header ( 'Content-Type: text/plain' );
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echo 'user=' . $user . "\n" . print_not_auth (19);
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// Make sure they specified a username.
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$no_user = translate ( 'No user specified.' );
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if ( empty ( $user ) )
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die_miserable_death ( $no_user );
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$get_unapproved = false;
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$datem = date ( 'm' );
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$dateY = date ( 'Y' );
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// Start date is beginning of this month.
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$startdate = mktime ( 0, 0, 0, $datem, 0, $dateY );
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// End date is one year from now.
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// Seems kind of arbitrary, eh?
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$enddate = mktime ( 0, 0, 0, $datem, 1, $dateY + 1 );
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/* Pre-Load the repeated events for quicker access. */
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$repeated_events = read_repeated_events ( $user, $startdate, $enddate, '' );
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/* Pre-load the non-repeating events for quicker access. */
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$events = read_events ( $user, $startdate, $enddate );
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// Loop from start date until we reach end date...
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for ( $d = $startdate; $d <= $enddate; $d += 86400 ) {
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$dYmd = date ( 'Ymd', $d );
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$ev = get_entries ( $dYmd, $get_unapproved );
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$evcnt = count ( $ev );
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for ( $i = 0; $i < $evcnt; $i++ ) {
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$event_text .= fb_export_time ( $dYmd, $ev[$i]->getDuration (),
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$ev[$i]->getTime (), 'ical' );
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$revents = get_repeating_entries ( $user, $dYmd, $get_unapproved );
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$recnt = count ( $revents );
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for ( $i = 0; $i < $recnt; $i++ ) {
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$event_text .= fb_export_time ( $dYmd, $revents[$i]->getDuration (),
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$revents[$i]->getTime (), 'ical' );
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header ( 'Content-Type: text/calendar' );
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header ( 'Content-Disposition: attachment; filename="' . $login . '.ifb"' );
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echo 'BEGIN:VCALENDAR' . "\r\n"
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. 'X-WR-CALNAME;VALUE=TEXT:' . str_replace ( ',', '\\,',
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( empty ( $publish_fullname ) ? $user : translate ( $publish_fullname ) ) ) . "\r\n"
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. 'VERSION:2.0' . "\r\n"
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. 'METHOD:PUBLISH' . "\r\n"
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. 'BEGIN:VFREEBUSY' . "\r\n"
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. 'DTSTART:' . export_get_utc_date ( date ( 'Ymd', $startdate ), 0 ) . "\r\n"
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. 'DTEND:' . export_get_utc_date ( date ( 'Ymd', $enddate ), '235959' ) . "\r\n"
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. 'URL:' . $GLOBALS['SERVER_URL'] . 'freebusy.php/' . $user . '.ifb' . "\r\n"
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. 'END:VFREEBUSY' . "\r\n"
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. 'END:VCALENDAR' . "\r\n";
added
removed
freebusy.php
