import { ClientConnection } from 'message-event-channel';
import { HandlerContainer } from './handler-container';
export declare const KEY = "visualization-sdk:context";
export declare enum CONTEXT_EVENTS {
    GET = "visualization-sdk:context:get",
    CHANGE = "visualization-sdk:context:change"
}
export declare type ContextModel = IContext;
export declare type ContextChangeHandler = (context: ContextModel) => void;
export declare type ContextChangeDispose = () => void;
export interface IContext {
    contentId: string;
    contentTypeUri: string;
    snapshotId: string | null;
    deliveryKey: string | null;
}
/**
 * Contex class allows you to get the context information of the content item you're viewing and watch for changes to asynchronously update your application
 */
export declare class Context {
    connection: ClientConnection;
    changeHandlerContainer: HandlerContainer<ContextChangeHandler>;
    constructor(connection: ClientConnection);
    /**
     * Get the current context information for the content item you're viewing
     *
     * ### Example
     *
     * ```typescript
     * const value = await visualization.context.get();
     *
     * console.log(value)
     * ```
     */
    get(): Promise<ContextModel>;
    /**
     * Sets up a listener for when the content item context information changes.
     *
     * @param cb - callback function to be called when context information changes.
     *
     * @returns a dispose function which removes the listener
     *
     * ### Example
     *
     * ```typescript
     *  const dispose = visualization.context.changed((model) => {
     *    // handle context change
     *  })
     * ```
     */
    changed(cb: ContextChangeHandler): ContextChangeDispose;
}