/**
 * Copyright (c) Microsoft Corporation. All rights reserved.
 */
/**
 * Represents the Cache Strategy to be used by the cached request
 *
 * @internal
 */
export declare const CacheStrategy: {
    /**
     * Serves from the server
     */
    readonly NetworkOnly: 0;
    /**
     * Serves from the cache if available or undefined
     */
    readonly CacheOnly: 1;
    /**
     * Serves from the cache if available
     * Sends network request only if cache is stale or not available
     * Update the cache with network data if network call is made
     */
    readonly CacheThenNetwork: 2;
    /**
     * Serves from the cache if available, and makes an async
     * network request to update the cache with fresh data.
     */
    readonly CacheAndNetwork: 3;
};
/**
 * Represents the Cache Strategy to be used by the cached request
 *
 * @internal
 */
export type CacheStrategy = (typeof CacheStrategy)[keyof typeof CacheStrategy];
/**
 * Represents the configurable options for cached SPHttpClient requests
 *
 * @internal
 */
export interface IHttpRequestCacheOptions {
    /**
     * Indicates the time in milliseconds that this cached response is valid for.
     * If undefined, cached data will never expire.
     */
    expirationDuration: number | undefined;
    /**
     * Indicates the Id of the component instance that is requesting this HttpRequest to be cached.
     */
    id: string;
    /**
     * Indicates the alias of the component instance that is requesting this HttpRequest to be cached.
     */
    alias: string;
}
/**
 * Represents the configurable options and caching strategy for cached SPHttpClient requests
 *
 * @internal
 */
export interface IRequestCacheOptions extends IHttpRequestCacheOptions {
    /**
     * Indicates the cache strategy for this request
     *
     * @internal
     */
    cacheStrategy?: CacheStrategy;
    /**
     * Extra properties to be used by cache data provider
     *
     * @internal
     */
    extraProps?: Map<string, any>;
}
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