public static function &get_instance()
{
// singleton setup
if (!isset(self::$instance)) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Constructor:
* Initializes the plugin.
*/
public function __construct()
{
$this->shortcode = null;
$this->options = null;
// ALWAYS:
// Register translation
add_action('plugins_loaded', array(&$this, 'load_textdomain'));
// Register shortcodes
add_shortcode('comment-guestbook', array(&$this, 'shortcode_comment_guestbook'));
// Register widgets
add_action('widgets_init', array(&$this, 'widget_init'));
// ADMIN PAGE:
if (is_admin()) {
// Include required php-files and initialize required objects
require_once CGB_PATH . 'admin/admin.php';
CGB_Admin::get_instance()->init_admin_page();
} else {
require_once 'includes/options.php';
$this->options = CGB_Options::get_instance();
// Filters required after new guestbook comment
if (isset($_POST['is_cgb_comment']) && $_POST['is_cgb_comment'] == $_POST['comment_post_ID']) {
// Set filter to overwrite comments_open status
if (isset($_POST['cgb_comments_status']) && 'open' === $_POST['cgb_comments_status']) {
add_filter('comments_open', array(&$this, 'filter_ignore_comments_open'), 50);
}
// Set filter to overwrite registration requirements for comments on guestbook page
if (get_option('comment_registration') && $this->options->get('cgb_ignore_comment_registration')) {
add_filter('option_comment_registration', array(&$this, 'filter_ignore_comment_registration'));
}
// Set filter to overwrite name and email requirement (actual requirement is set via guestbook options)
add_filter('option_require_name_email', array(&$this, 'filter_require_name_email'));
}
// Fix link after adding a comment (required if clist_order = desc) and added query for message after comment
add_filter('comment_post_redirect', array(&$this, 'filter_comment_post_redirect'));
// Filters for comments on other pages/posts
add_action('comment_form_before_fields', array(&$this, 'page_comment_filters'));
// Add message after comment
if (isset($_GET['cmessage']) && 1 == $_GET['cmessage']) {
require_once CGB_PATH . 'includes/cmessage.php';
$cmessage = CGB_CMessage::get_instance();
$cmessage->init();
}
}
}