import NativeEvents from '../../utils/NativeEvents';
import type { UnsubscribeFunction } from '../conference/models';
import { FileConvertedEventType, FilePresentationChangedEventType, FilePresentationServiceEventNames } from './events';
import type { FileConverted, File, FilePresentation } from './models';
/**
 * The FilePresentationService allows presenting files during a conference. The Dolby.io Communications APIs service converts provided files into multiple images that are accessible through the [getImage](#getimage) method.
 *
 * **The file presentation workflow:**
 *
 * **1.** The presenter calls the [convert](#convert) method to upload and convert a file.
 *
 * **2.** The presenter receives [information](doc:rn-client-sdk-models-fileconverted) about the converted file via the [onFileConverted](#onfileconverted) listener.
 *
 * **3.** The presenter calls the [start](#start) method to start presenting the file.
 *
 * **4.** The presenter and the viewers receive [information](doc:rn-client-sdk-models-filepresentation) about the shared file via the [onFilePresentationChange](#onfilepresentationchange) listener. This information should trigger calling the [getImage](#getimage) method to get the converted file images URLs and display the proper page of the file by retrieving the individual images.
 *
 * **5.** The application is responsible for coordinating the page flip between the local and the presented files. The presenter calls the [update](#update) method to inform the service to send the updated page number to participants.
 *
 * **7.** The presenter and viewers receive [information](doc:rn-client-sdk-models-filepresentation) about the updated file via the [onFilePresentationChange](#onfilepresentationchange) listener with the current page number. This information should trigger calling the [image](#image) method to display the proper page of the file.
 *
 * **8.** The presenter may call the [getThumbnail](#getthumbnail) method to obtain thumbnail images of the file and implement a carousel control for the presenting user to flip pages locally.
 *
 * **9.** The presenter calls the [stop](#stop) method to end the file presentation.
 *
 * **10.** The presenter and the viewers receive [information](doc:rn-client-sdk-models-filepresentation) about the end of the file presentation via the [onFilePresentationChange](#onfilepresentationchange) listener.
 *
 */
export declare class FilePresentationService {
    /** @internal */
    _nativeModule: any;
    /** @internal */
    _nativeEvents: NativeEvents;
    /**
     * Converts a provided file into multiple images. The file is uploaded as FormData.
     *
     * The supported file formats are:
     * - doc/docx (Microsoft Word)
     * - ppt/pptx
     * - pdf
     *
     * After the conversion, the files are broken into individual images with a maximum resolution of 2560x1600.
     *
     * When a file is converted and ready to be presented, the application receives the [converted](#converted) event.
     * @param file The file that a presenter wants to share during a conference.
     */
    convert(file: File): Promise<FileConverted>;
    /**
     * Returns information about the current state of the file presentation.
     */
    getCurrent(): Promise<FilePresentation>;
    /**
     * Provides the image's URL that refers to a specific page of the presented file.
     * @param page The number of the presented page. Files that do not have any pages, for example, jpg images, require setting the page value to 0.
     */
    getImage(page: number): Promise<string>;
    /**
     * Provides the URL of a thumbnail that refers to a specific page of the presented file.
     * @param page The number of the presented page. Files that do not contain any pages, for example, jpg images, require setting the value of this parameter to 0.
     */
    getThumbnail(page: number): Promise<string>;
    /**
     * Informs the service to send the updated page number to conference participants.
     * @param page The page number that corresponds to the required page.
     */
    setPage(page: number): Promise<void>;
    /**
     * Starts a file presentation.
     * @param file The converted file that the presenter wants to share during the conference.
     */
    start(file: FileConverted): Promise<void>;
    /**
     * Stops a file presentation.
     */
    stop(): Promise<void>;
    /**
     * Adds a listener to the file converted event.
     * @param handler An event callback function.
     * @returns A function that unsubscribes from event listeners.
     */
    onFileConverted(handler: (data: FileConvertedEventType) => void): UnsubscribeFunction;
    /**
     * Adds a listener to the file presentation changed event.
     * @param handler An event callback function.
     * @returns A function that unsubscribes from event listeners.
     */
    onFilePresentationChange(handler: (data: FilePresentationChangedEventType, type?: FilePresentationServiceEventNames.FilePresentationStarted | FilePresentationServiceEventNames.FilePresentationStopped | FilePresentationServiceEventNames.FilePresentationUpdated) => void): UnsubscribeFunction;
}
declare const _default: FilePresentationService;
export default _default;