import { Logger, LogLevel } from '@kephas/core';
/**
 * Notification service.
 *
 * @export
 * @class NotificationService
 */
export declare class NotificationService {
    /**
     * Gets or sets the logger.
     *
     * @protected
     * @type {Logger}
     * @memberof NotificationService
     */
    protected logger: Logger;
    /**
     * Creates an instance of Notification.
     * @param {Logger} [logger] Optional. The logger.
     * @memberof NotificationService
     */
    constructor(logger?: Logger);
    /**
     * Notifies the message at error level.
     *
     * @param {*} data The information to be displayed.
     * @memberof NotificationService
     */
    notifyError(data: any): void;
    /**
     * Notifies the message at warning level.
     *
     * @param {*} data The information to be displayed.
     * @memberof NotificationService
     */
    notifyWarning(data: any): void;
    /**
     * Notifies the message at information level.
     *
     * @param {*} data The information to be displayed.
     * @memberof NotificationService
     */
    notifyInfo(data: any): void;
    /**
     * Shows the notification.
     *
     * @protected
     * @param {*} formattedData The formatted data.
     * @param {LogLevel} severity The severity.
     * @memberof NotificationService
     */
    protected show(formattedData: any, severity: LogLevel): void;
    /**
     * Formats the data. By default it returns a formatted string.
     *
     * @protected
     * @param {*} data The information to be formatted.
     * @returns {string}
     * @memberof NotificationService
     */
    protected formatData(data: any): any;
}