import { AuthStrategy, AuthStrategyType } from '../../../models/security/authentication';
import { AuthenticatedUser } from '../../../models/security';
import { LoginData } from '../../../models/security/authentication/login-data';
import { SecurityService } from '../security.service';
import { AuthenticationStorageService } from '../authentication-storage.service';
/**
 * Abstract base class for GDB login strategies.
 * Implements common login functionality for GDB token-based authentication.
 * Strategies, which need to be able to use the login method, should extend this class, e.g. GdbTokenAuthProvider, ExternalStrategy.
 */
export declare abstract class BaseGdbLoginStrategy implements AuthStrategy {
    protected readonly securityService: SecurityService;
    protected readonly logger: import("../../logging").LoggerService;
    protected readonly authStorageService: AuthenticationStorageService;
    abstract type: AuthStrategyType;
    abstract initialize(): Promise<boolean>;
    abstract isAuthenticated(): boolean;
    abstract logout(): Promise<void>;
    abstract isExternal(): boolean;
    /**
     * Fetches the currently authenticated user using the security service.
     *
     * @returns A promise that resolves to the authenticated user.
     */
    fetchAuthenticatedUser(): Promise<AuthenticatedUser>;
    /**
     * Attempts to log in using the provided username and password.
     * On success, stores the authentication token and updates the authenticated user in the security context.
     * Logs and throws an error if the user cannot be mapped from the response.
     * @param {LoginData} loginData - The login credentials (username and password).
     * @returns {Promise<void>} A promise that resolves when login is complete.
     */
    login(loginData: LoginData): Promise<AuthenticatedUser>;
    private getAuthenticationHeader;
}