/**
* Outputs the content of the widget
*
* @param array $args
* @param array $instance
*/
public function widget($args, $instance)
{
$events = array();
$count = $instance['count'] ? $instance['count'] : 3;
if (class_exists('WPE_WordCampEvents')) {
$event_class = WPE_WordCampEvents::get_instance();
$event_args = array('count' => $count);
$events = $event_class->get_events($event_args);
}
// ******
// Output all the widget content
echo $args['before_widget'];
// Output the widget title
if (!empty($instance['title'])) {
echo $args['before_title'] . apply_filters('widget_title', $instance['title']) . $args['after_title'];
}
// Output the city name if it is available
if (class_exists('WPEngine\\GeoIp')) {
$geoip = WPEngine\GeoIp::instance();
if ($geoip->city()) {
echo '<p class="event-field home-location">' . ucwords($geoip->city()) . '</p>';
}
}
echo '<ul class="events">';
foreach ($events as $event) {
if ($event['website']) {
$a_open = '<a href="' . $event['website'] . '">';
$a_close = '</a>';
} else {
$a_open = $a_close = '';
}
echo <<<HTML
\t<li>
\t\t<p class="event-field event-date">{$event['date']}</p>
\t\t<p class="event-field event-location">{$event['location']}</p>
\t\t<p class="event-field event-name">{$a_open}{$event['title']}{$a_close}</p>
\t</li>
HTML;
}
echo '</ul>';
echo $args['after_widget'];
}
/**
* Sorts events by distance from user
*
* Uses GeoIP to determine user's location
*
* @link http://andrew.hedges.name/experiments/haversine/
* @param array $events The events before sorting
* @return array $events The events after sorting
*/
private function sort_events_by_distance($events)
{
// If we can't get the user's location, abort
if (!class_exists('WPEngine\\GeoIp')) {
return $events;
}
$geo = WPEngine\GeoIp::instance();
$lat1 = deg2rad($geo->latitude());
$lng1 = deg2rad($geo->longitude());
$radius = 3961;
// Radius of the Earth in miles
$dist = array();
foreach ($events as $key => $event) {
// If there's no latlng, let's set it to a ridiculously huge distance
if (!$event['latlng']) {
$events[$key]['distance'] = 1000000;
$dist[$key] = 1000000;
continue;
}
$lng2 = deg2rad($event['latlng']['lng']);
$lat2 = deg2rad($event['latlng']['lat']);
$dlng = $lng2 - $lng1;
$dlat = $lat2 - $lat1;
$a = sin($dlat / 2) * sin($dlat / 2) + cos($lat1) * cos($lat2) * sin($dlng / 2) * sin($dlng / 2);
$c = 2 * atan2(sqrt($a), sqrt(1 - $a));
$d = $radius * $c;
$events[$key]['distance'] = $d;
$dist[$key] = $d;
}
// Sort the events by their timestamp
array_multisort($dist, SORT_ASC, $events);
return $events;
}