/// <reference types="node" />
import CancellationToken from 'cancellationtoken';
import { ProtectedOperation } from './ProtectedOperation';
import { IDisposable } from './IDisposable';
import StrictEventEmitter from 'strict-event-emitter-types';
import { EventEmitter } from 'events';
/**
 * Describes the events that can be fired from {@linkcode IAuthorizationService}
 */
export interface AuthorizationServiceEvents {
    credentialsChanged: () => void;
    authorizationChanged: () => void;
}
/**
 * The {@linkcode StrictEventEmitter} extended by {@linkcode IAuthorizationService}
 */
export type AuthorizationServiceEmitter = StrictEventEmitter<EventEmitter, AuthorizationServiceEvents>;
/**
 * Defines an authorization service to determine user permissions.
 * Emits events on authorization and credential changes.
 */
export interface IAuthorizationService extends IDisposable, AuthorizationServiceEmitter {
    /**
     * Gets the user's credentials
     * @param cancellationToken A cancellation token
     */
    getCredentials(cancellationToken?: CancellationToken): Promise<{
        [key: string]: string;
    }>;
    /**
     * Checks if a user is authorized to perform a certain operation
     * @param operation The operation to perform
     * @param cancellationToken A cancellation token
     */
    checkAuthorization(operation: ProtectedOperation, cancellationToken?: CancellationToken): Promise<boolean>;
}