import { DataSource } from 'typeorm';
import { AuthToken } from '../persistance/entity/AuthToken';
/**
 * AuthService performs all tasks related to User authentication
 */
declare class AuthService {
    private dataSource;
    private static readonly SALT_ROUNDS;
    private userRepo;
    private authTokenRepo;
    constructor(dataSource: DataSource);
    /**
     * Authenticate a user given the username and password. If it is a valid combination a new AuthToken will be returned and internally associated to the user
     * The token inside the returned AuthToken must be included in all authenticated requests for that user (as a )
     * @param username The username of the user
     * @param password The password of the user
     * @returns A new AuthToken which contains the token needed for the user to make authenticated requests
     */
    authenticate(username: string, password: string): Promise<AuthToken | undefined>;
    /**
     * Retrieve a User's AuthToken or null if one does not exist, or the username does not exist
     * @param username The username of the user whose AuthToken is to be retrieved
     * @returns The AuthToken for the User with the matching username, or null if the username does not exist or the AuthToken is null
     */
    getUserAuthToken(username: string): Promise<AuthToken | null>;
    /**
     * Retrieve a full AuthToken based on it's 'token' field
     * @param token The token value of the AuthToken to be retrieved
     * @returns The AuthToken with the matching 'token' value, or null in none exists
     */
    getAuthTokenByToken(token: string): Promise<AuthToken | null>;
    /**
     * Determine if an AuthToken is valid or invalid based on its 'expires' field
     * @param authToken The AuthToken to validate
     * @returns If the AuthToken's 'expires' field is in the future return true, otherwise return false
     */
    isAuthTokenValid(authToken: AuthToken): boolean;
    /**
     * Get a salted hash of a password
     * @param password The password to salt and hash
     * @returns A salted hash of the password
     */
    private getPasswordHash;
}
export declare const authService: AuthService;
export {};