Type of secret (one of 'register', 'authorize', 'publicize').
	 * @param \WP_User $user The user object.
	 */
	public function jetpack_verify_secrets_success( $action, $user ) {
		$this->tracking->record_user_event( "jpc_verify_{$action}_success", array(), $user );
	}

	/**
	 * Track that we've failed verifying the secrets.
	 *
	 * @access public
	 *
	 * @param string    $action Type of secret (one of 'register', 'authorize', 'publicize').
	 * @param \WP_User  $user The user object.
	 * @param \WP_Error $error Error object.
	 */
	public function jetpack_verify_secrets_fail( $action, $user, $error ) {
		$this->tracking->record_user_event(
			"jpc_verify_{$action}_fail",
			array(
				'error_code'    => $error->get_error_code(),
				'error_message' => $error->get_error_message(),
			),
			$user
		);
	}

	/**
	 * Track a failed login attempt.
	 *
	 * @access public
	 *
	 * @param string $login Username or email address.
	 */
	public function wp_login_failed( $login ) {
		$this->tracking->record_user_event(
			'failed_login',
			array(
				'origin_ip' => IP_Utils::get_ip(),
				'login'     => $login,
			)
		);
	}

	/**
	 * Track a connection failure at the registration step.
	 *
	 * @access public
	 *
	 * @param string|int $error      The error code.
	 * @param \WP_Error  $registered The error object.
	 */
	public function jetpack_connection_register_fail( $error, $registered ) {
		$this->tracking->record_user_event(
			'jpc_register_fail',
			array(
				'error_code'    => $error,
				'error_message' => $registered->get_error_message(),
			)
		);
	}

	/**
	 * Track that the registration step of the connection has been successful.
	 *
	 * @access public
	 *
	 * @param string $from The 'from' GET parameter.
	 */
	public function jetpack_connection_register_success( $from ) {
		$this->tracking->record_user_event(
			'jpc_register_success',
			array(
				'from' => $from,
			)
		);
	}

	/**
	 * Handles the jetpack_xmlrpc_server_event action that combines several types of events that
	 * happen during request serving.
	 *
	 * @param String                   $action the action name, i.e., 'remote_authorize'.
	 * @param String                   $stage  the execution stage, can be 'begin', 'success', 'error', etc.
	 * @param array|WP_Error|IXR_Error $parameters (optional) extra parameters to be passed to the tracked action.
	 * @param WP_User                  $user (optional) the acting user.
	 */
	public function jetpack_xmlrpc_server_event( $action, $stage, $parameters = array(), $user = null ) {

		if ( is_wp_error( $parameters ) ) {
			$parameters = array(
				'error_code'    => $parameters->get_error_code(),
				'error_message' => $parameters->get_error_message(),
			);
		} elseif ( is_a( $parameters, '\\IXR_Error' ) ) {
			$parameters = array(
				'error_code'    => $parameters->code,
				'error_message' => $parameters->message,
			);
		}

		$this->tracking->record_user_event( 'jpc_' . $action . '_' . $stage, $parameters, $user );
	}

	/**
	 * Track that the site is incorrectly double-encoding redirects from http to https.
	 *
	 * @access public
	 */
	public function jetpack_verify_api_authorization_request_error_double_encode() {
		$this->tracking->record_user_event( 'error_double_encode' );
	}
}