import Modal from '~/components/Modal';
import Language from '~/interfaces/Language';
/**
 * Password-protected document entry modal.
 *
 * Displays a password input form when the PDF document requires authentication.
 * The modal blocks the viewer until the correct password is submitted.
 * Password verification is delegated to a client-supplied listener via {@link onEnter}.
 *
 * The {@link show} method returns a `Promise<void>` that resolves only when
 * the correct password is entered, allowing the caller to `await` it.
 */
export default class PasswordModal extends Modal {
    /** Callback invoked when the user submits a password. Returns whether the password is correct. */
    private enterListener;
    /** Resolve function for the promise returned by {@link show}. */
    private rslv;
    /** Reject function for the promise returned by {@link show}. */
    private rej;
    /** Loading spinner shown during password verification. */
    private loading;
    /** Password text input element. */
    private passwordInput;
    /** Element that displays the "incorrect password" error message. */
    private incorrect;
    /** Form submit button. */
    private submitButton;
    /**
     * Creates a password modal and sets up form submission handling.
     *
     * @param context  - The parent DOM element to append the modal into.
     * @param language - The locale resource for localized labels and messages.
     */
    constructor(context: HTMLElement, language: Language);
    /**
     * Returns the localized HTML string for the password modal content.
     *
     * @returns The compiled Handlebars template string.
     */
    render(): string;
    /**
     * Shows the password modal and returns a promise that resolves when the correct password is entered.
     *
     * The caller should `await` this method. The promise resolves after successful
     * password verification, or rejects if an error occurs during verification.
     *
     * @returns A promise that resolves when the password is accepted.
     */
    show(): Promise<void>;
    /**
     * Destroys the modal and its associated loading spinner.
     */
    destroy(): void;
    /**
     * Registers a callback for password verification.
     *
     * The callback receives the entered password and must return `true` if the
     * password is correct, or `false` otherwise. The callback may be async.
     *
     * @param listener - The password verification callback.
     * @returns This instance for chaining.
     */
    onEnter(listener: (password: string) => boolean | Promise<boolean>): PasswordModal;
}