Free/Busy Calendar - https://www.porcheron.uk/fbc

Usage

An example usage can be found in example.php. This file connects to a CalDAV server, extracts two weeks of dates (excluding weekends) and generates an HTML table. A sample walkthough of the code is below:

If you are loading an iCal file, use the Calendar class:

$cal = (new MPorcheron\FreeBusyCal\Calendar())->setFile('calendar.ics');

Alternatively:

• if the file is accessed over the internet, use the setUrl(url) function instead of setFile(file).
• if you have the calendar source inside a string, use the function setiCal(source)

Howevever, if your calendar is retrieved from a CalDAV server and not an ICS file, use the CalDAVCalendar class:

$iCloud = (new MPorcheron\FreeBusyCal\CalDAVCalendar())
    ->setUsername('my.apple.id@me.com')
    ->setPassword('application-specific-password')
    ->setPrincipalUrl('https://caldav.icloud.com/123456789876543/principal/');

Create the Generator object and add one or more calendars:

$fbc = new \MPorcheron\FreeBusyCal\Generator($cal, $iCloud);

Set the date range to extract, e.g. start from this Monday, and run for 14 days (i.e. two weeks), but exclude weekends:

$fbc->setDateRange(new \DateTime('Monday this week'), 14, false);

Only generate a calendar between 9am (inclusive) and 5pm (exclusive):

$fbc->setTimeRange(9, 17);

Fetch the calendars and process them:

$fbc->fetchAndParse();

Print out the calendar as a table, default date and time formats, the labels Free and Busy for slots, and show times as ranges (i.e. start – end):

$contents = $fbc->generate(function (Fbc\FreeBusyCalendar &$cal) {
    $output = '<table class="cal">';

    // Output table headers with days
    $output .= '<tr><th></th>';
    $days = [ 'S', 'M', 'T', 'W', 'T', 'F', 'S' ];
    foreach ($cal->getCalendarDates(Fbc\FreeBusyCalendar::DATE_FORMAT) as $label => &$dt) {
        $output .= '<th class="day">'. $days[$dt->format('N')] .'</th>';
    }
    $output .= '</tr>';

    // Output table headers with dates
    $output .= '<tr><th></th>';
    foreach ($cal->getCalendarDates(Fbc\FreeBusyCalendar::DATE_FORMAT) as $label => &$dt) {
        $output .= '<th class="date">'. $label .'</th>';
    }
    $output .= '</tr>';

    // Iterate through each time and $output .= the availability
    $times = $cal->getCalendarTimes(Fbc\FreeBusyCalendar::TIME_FORMAT);
    foreach ($times as $hour => $temp) {
        foreach ($temp as $minute => $labels) {
            $output .= '<tr><td class="time">'. $labels[0];
            if ($showRange) {
                $output .= '&nbsp;&ndash;&nbsp;' . $labels[1];
            }
            $output .= '</td>';

            foreach ($cal->getCalendarDates(Fbc\FreeBusyCalendar::DATE_FORMAT) as $dt) {
                if ($cal->isFree($dt->format('Y-m-d'), $hour, $minute)) {
                    $output .= '<td class="avail free">Free</td>';
                } else {
                    $output .= '<td class="avail busy">Busy</td>';
                }
            }
        }
        $output .= '</td>';
    }
    $output .= '</table>';

    return $output;
});

Alternatively test if a specific time/date (i.e. 5pm on 4th May 2016) is available:

 $cal = $fbc->getFreeBusyCalendar();
 $free = $cal->isFree('2016-05-04', 17, 0);

Testing

This has been tested with the ICS file from Office 365 and iCloud CalDAV.

Questions/Issues?

Please submit a GitHub issue. Documentation auto-generated from the code can be found on GitHub pages or the docs directory.