/**
* Return an instance of this class.
*
* @return object A single instance of this class.
*/
public static function get_instance()
{
// If the single instance hasn't been set, set it now.
if (null == self::$instance) {
self::$instance = new self();
}
return self::$instance;
}
/**
* Initialize the plugin by loading admin scripts & styles and adding a
* settings page and menu.
*/
private function __construct()
{
$plugin = WP_Hashcash::get_instance();
$this->plugin_slug = $plugin->get_plugin_slug();
// Add the options page and menu item.
add_action('admin_menu', array($this, 'add_plugin_admin_menu'));
// Settings
add_action('admin_init', array($this, 'settings_api'));
}
function wpcf7_hashcash_validation_filter($result, $tag)
{
if (!class_exists('WP_Hashcash')) {
die("WP_Hashcash Class is not available.");
}
$instance = WP_Hashcash::get_instance();
$tag = new WPCF7_Shortcode($tag);
$hashcashid = $_POST['hashcashid'];
if (!$hashcashid) {
die("hashcashid value is not available.");
}
$type = $tag->type;
$name = $tag->name;
$op = wpcf7_hashcash_options($tag->options);
$hashcash_result = $instance->verify_hash($hashcashid, $op['complexity']);
if ($hashcash_result !== 'ok') {
$result['valid'] = false;
$result['reason'][$name] = wpcf7_get_message('hashcash_error');
}
if (isset($result['reason'][$name]) && ($id = $tag->get_id_option())) {
$result['idref'][$name] = $id;
}
return $result;
}