export declare const MESSAGE_CATEGORY: {
    SENT: string;
    RECEIVED: string;
};
export declare const MESSAGE_TYPES: {
    TEXT: string;
    IMAGE: string;
};
/**
 * Parent to: ReceivedMessage, SentMessage
 *
 * @export
 * @class Message
 */
export declare class Message {
    /**
     * Category of Message : Values includes MESSAGE_CATEGORY class
     * @private
     * @memberof Message
     */
    private category;
    /**
     * Message Text: Used for both Sent and Received Messages
     * @private
     * @type {string}
     * @memberof Message
     */
    private text;
    /**
     * Image URL: Used for both Sent and Received Messages
     * @private
     * @type {string}
     * @memberof Message
     */
    private imageUrl;
    /**
     * Creates an instance of Message.
     * @param {*} category
     * @memberof Message
     */
    constructor(category: any);
    /**
     * Set text of message : Used for both Sent and Received Messages
     * @param {string} text
     * @returns Message
     * @memberof Message
     */
    setText(text: string): this;
    /**
     * Returns message text
     * @returns string
     * @memberof Message
     */
    getText(): string;
    /**
     * Set image URL of message : Used for both Sent and Received Messages
     * @param {string} imageUrl
     * @returns Message
     * @memberof Message
     */
    setImageUrl(imageUrl: string): this;
    /**
     * Returns image URL
     * @returns string
     * @memberof Message
     */
    getImageUrl(): string;
    /**
     * Returns message category
     * @returns string
     * @memberof Message
     */
    getCategory(): any;
}
/**
 * This class is used to create an instance of ReceivedMessage
 * It extends parent Message class with methods to set/get QuickReplies
 *
 * @export
 * @class ReceivedMessage
 * @extends {Message}
 */
export declare class ReceivedMessage extends Message {
    /**
     * Set Quick Replies buttons in received message
     * @private
     * @type {string[]}
     * @memberof ReceivedMessage
     */
    private quickReplies;
    /**
     *Creates an instance of ReceivedMessage.
     * @memberof ReceivedMessage
     */
    constructor();
    /**
     * Set quick replies of Receiveed Message
     * @param {string[]} quickReplies
     * @returns ReceivedMessage
     * @memberof ReceivedMessage
     */
    setQuickReplies(quickReplies: string[]): this;
    /**
     * Returns the set quick replies
     * @returns string[]
     * @memberof ReceivedMessage
     */
    getQuickReplies(): string[];
}
/**
 * This class is used to create an instance of SentMessage
 * It extends parent Message class no additional methods.
 *
 * @export
 * @class SentMessage
 * @extends {Message}
 */
export declare class SentMessage extends Message {
    /**
     *Creates an instance of SentMessage.
     * @memberof SentMessage
     */
    constructor();
}