import type { IRenderMime } from '@jupyterlab/rendermime-interfaces';
import type { ServerConnection } from '@jupyterlab/services';
import type { IDataConnector } from '@jupyterlab/statedb';
import { DataConnector } from '@jupyterlab/statedb';
import { Token } from '@lumino/coreutils';
/**
 * Application default locale.
 */
export declare const DEFAULT_LANGUAGE_CODE = "en";
/**
 * Metadata describing translation domain.
 */
interface IDomainMetadata {
    /**
     * Domain name, e.g. jupyterlab-git.
     */
    domain: string;
    /**
     * Language.
     */
    language: string;
    /**
     * Plural forms string in gettext format, e.g. `nplurals=2; plural=(n > 1);`.
     */
    plural_forms: string;
    /**
     * Version.
     */
    version?: string;
}
/**
 * Domain data is a key-value map of translations.
 *
 * Empty string key is a special value with the domain metadata.
 */
export type DomainData = Record<string, string[]> & {
    '': IDomainMetadata;
};
export type Language = {
    /**
     * Warning message, empty string if absent.
     *
     * Present if requested language pack is invalid or missing.
     */
    message: string;
    /**
     * Domain data, keyed by domain name.
     */
    data: Record<string, DomainData>;
};
/**
 * Description of language.
 */
export interface ILanguageData {
    /**
     * Display name of the language in the current language.
     */
    displayName: string;
    /**
     * Display name of the language in the language itself.
     */
    nativeName: string;
}
export interface ILanguageList {
    /**
     * Warning message, empty string if absent.
     *
     * Present if one or more language packs is invalid.
     */
    message: string;
    /**
     * List of available languages, keyed by language identifier.
     */
    data: Record<string, ILanguageData>;
}
/**
 * Translation connection interface.
 */
export interface ITranslatorConnector extends IDataConnector<Language, Language | ILanguageList, {
    language: string;
} | undefined> {
    /**
     * Fetch language list or given language.
     */
    fetch(): Promise<ILanguageList>;
    fetch(opts: {
        language: string;
    }): Promise<Language>;
}
/**
 * A service to connect to the server translation endpoint
 */
export declare const ITranslatorConnector: Token<ITranslatorConnector>;
export declare class TranslatorConnector extends DataConnector<Language, Language, {
    language: string;
} | undefined> implements ITranslatorConnector {
    constructor(translationsUrl?: string, serverSettings?: ServerConnection.ISettings);
    fetch(): Promise<ILanguageList>;
    fetch(opts: {
        language: string;
    }): Promise<Language>;
    private _serverSettings;
    private _translationsUrl;
}
/**
 * Bundle of gettext-based translation functions for a specific domain.
 */
export type TranslationBundle = IRenderMime.TranslationBundle;
/**
 * Translation provider interface
 */
export interface ITranslator extends IRenderMime.ITranslator {
}
/**
 * Translation provider token
 */
export declare const ITranslator: Token<ITranslator>;
export {};