import { Observable } from "../observer/Observable";
import { LanguageService } from "../LanguageService";
import { ProgressMessage } from "../task/messages/ProgressMessage";
import { LocalizedUrl } from "../../domain/models/LocalizedUrl";
import { ISO639_1 } from "../../domain/definitions/types/Country";
/**
 * A class that provides functionality to handle public resources, including managing folder paths, URLs, and localized URLs.
 * It supports loading files from specified paths with tracking progress and loading of localized resources.
 * @template LSupported A generic parameter that extends ISO639_1, representing the supported language codes
 */
export declare class PublicResource<LSupported extends ISO639_1> {
    /**
     * The normalized path to the resource folder
     */
    private readonly _folderPath;
    /**
     * The complete URL to access the resource
     */
    private readonly _url;
    /**
     * Observable that emits localized URL information for the resource
     */
    private readonly _localizedUrl;
    /**
     * Service handling language-specific operations and resource localization
     */
    private readonly _languageService;
    /**
     * Creates a new PublicResource instance
     * @param {string} folderPath The path to the resource folder
     * @param {LanguageService<LSupported>} languageService Service for handling language-specific operations
     */
    constructor(folderPath: string, languageService: LanguageService<LSupported>);
    /**
     * @returns {string} The normalized folder path
     */
    get folderPath(): string;
    /**
     * @returns {URL} The complete URL for accessing the resource
     */
    get url(): URL;
    /**
     * @returns {Observable<LocalizedUrl>} An observable emitting the localized URL
     */
    get localizedUrl(): Observable<LocalizedUrl>;
    /**
     * Loads and processes a file from the specified path
     * @template T The type of data returned from the file
     * @param {string} file Path to the file
     * @param {(data: Promise<T | URL>) => void} onLoaded Callback function executed when file is loaded
     */
    load<T>(file: string, onLoaded: (data: Promise<T | URL>) => void): Observable<ProgressMessage>;
    /**
     * Loads a localized file with progress tracking
     * @template T The type of data returned from the file
     * @param {string} file The name or path of the file to load
     * @param {(data: Promise<T | URL>) => void} onLoaded Callback executed when file is loaded
     * @returns {Observable<ProgressMessage>} Observable tracking the loading progress
     */
    loadLocalized<T>(file: string, onLoaded: (data: Promise<T | URL>) => void): Observable<ProgressMessage>;
    /**
     * Generates a localized URL based on the current language settings
     * @returns {Observable<LocalizedUrl>} An observable containing the localized URL information
     */
    private _generateLocalizedUrl;
    /**
     * Validates and returns the file extension from the given file path
     * @param {string} file The file path to check
     * @returns {string} The extracted file extension
     * @throws {MissingFileExtensionError} If the file extension is missing
     * @throws {InvalidFileExtensionError} If the file extension is invalid
     */
    private _assertFileExtension;
    /**
     * Handles the file loading process based on the file type
     * @template T The type of data to be loaded
     * @param {URL} url The URL of the file to load
     * @param {string} fileExt The file extension
     * @param {Observable<ProgressMessage>} progressObserver Observable for tracking loading progress
     * @returns {Promise<T | URL>} Promise resolving to the loaded data or URL
     */
    private _handleFileLoading;
}