private function __construct()
{
// Determine with the user ID if the user is logged in.
self::$userID = get_current_user_id();
// Generate link for mark all forums read.
self::$markAllReadLink = esc_url(add_query_arg(array('view' => 'markallread'), get_permalink()));
// Initialize data. For guests we use a cookie as source, otherwise use database.
if (self::$userID) {
// Create database entry when it does not exist.
if (!get_user_meta(self::$userID, 'asgarosforum_unread_cleared', true)) {
add_user_meta(self::$userID, 'asgarosforum_unread_cleared', '0000-00-00 00:00:00');
}
// Get IDs of excluded topics.
self::$excludedItems = get_user_meta(self::$userID, 'asgarosforum_unread_exclude', true);
} else {
// Create a cookie when it does not exist.
if (!isset($_COOKIE['asgarosforum_unread_cleared'])) {
// There is no cookie set so basically the forum has never been visited.
setcookie('asgarosforum_unread_cleared', '0000-00-00 00:00:00', 2147483647);
}
// Get IDs of excluded topics.
if (isset($_COOKIE['asgarosforum_unread_exclude'])) {
self::$excludedItems = maybe_unserialize($_COOKIE['asgarosforum_unread_exclude']);
}
}
}
