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import { HandlerCallbackOptions, RouteHandlerObject, WorkboxPlugin } from 'workbox-core/types.js';
import { StrategyHandler } from './StrategyHandler.js';
import './_version.js';
export interface StrategyOptions {
cacheName?: string;
plugins?: WorkboxPlugin[];
fetchOptions?: RequestInit;
matchOptions?: CacheQueryOptions;
}
/**
* An abstract base class that all other strategy classes must extend from:
*
* @memberof workbox-strategies
*/
declare abstract class Strategy implements RouteHandlerObject {
cacheName: string;
plugins: WorkboxPlugin[];
fetchOptions?: RequestInit;
matchOptions?: CacheQueryOptions;
protected abstract _handle(request: Request, handler: StrategyHandler): Promise<Response | undefined>;
/**
* Creates a new instance of the strategy and sets all documented option
* properties as public instance properties.
*
* Note: if a custom strategy class extends the base Strategy class and does
* not need more than these properties, it does not need to define its own
* constructor.
*
* @param {Object} [options]
* @param {string} [options.cacheName] Cache name to store and retrieve
* requests. Defaults to the cache names provided by
* {@link workbox-core.cacheNames}.
* @param {Array<Object>} [options.plugins] [Plugins]{@link https://developers.google.com/web/tools/workbox/guides/using-plugins}
* to use in conjunction with this caching strategy.
* @param {Object} [options.fetchOptions] Values passed along to the
* [`init`](https://developer.mozilla.org/en-US/docs/Web/API/WindowOrWorkerGlobalScope/fetch#Parameters)
* of [non-navigation](https://github.com/GoogleChrome/workbox/issues/1796)
* `fetch()` requests made by this strategy.
* @param {Object} [options.matchOptions] The
* [`CacheQueryOptions`]{@link https://w3c.github.io/ServiceWorker/#dictdef-cachequeryoptions}
* for any `cache.match()` or `cache.put()` calls made by this strategy.
*/
constructor(options?: StrategyOptions);
/**
* Perform a request strategy and returns a `Promise` that will resolve with
* a `Response`, invoking all relevant plugin callbacks.
*
* When a strategy instance is registered with a Workbox
* {@link workbox-routing.Route}, this method is automatically
* called when the route matches.
*
* Alternatively, this method can be used in a standalone `FetchEvent`
* listener by passing it to `event.respondWith()`.
*
* @param {FetchEvent|Object} options A `FetchEvent` or an object with the
* properties listed below.
* @param {Request|string} options.request A request to run this strategy for.
* @param {ExtendableEvent} options.event The event associated with the
* request.
* @param {URL} [options.url]
* @param {*} [options.params]
*/
handle(options: FetchEvent | HandlerCallbackOptions): Promise<Response>;
/**
* Similar to {@link workbox-strategies.Strategy~handle}, but
* instead of just returning a `Promise` that resolves to a `Response` it
* it will return an tuple of `[response, done]` promises, where the former
* (`response`) is equivalent to what `handle()` returns, and the latter is a
* Promise that will resolve once any promises that were added to
* `event.waitUntil()` as part of performing the strategy have completed.
*
* You can await the `done` promise to ensure any extra work performed by
* the strategy (usually caching responses) completes successfully.
*
* @param {FetchEvent|Object} options A `FetchEvent` or an object with the
* properties listed below.
* @param {Request|string} options.request A request to run this strategy for.
* @param {ExtendableEvent} options.event The event associated with the
* request.
* @param {URL} [options.url]
* @param {*} [options.params]
* @return {Array<Promise>} A tuple of [response, done]
* promises that can be used to determine when the response resolves as
* well as when the handler has completed all its work.
*/
handleAll(options: FetchEvent | HandlerCallbackOptions): [Promise<Response>, Promise<void>];
_getResponse(handler: StrategyHandler, request: Request, event: ExtendableEvent): Promise<Response>;
_awaitComplete(responseDone: Promise<Response>, handler: StrategyHandler, request: Request, event: ExtendableEvent): Promise<void>;
}
export { Strategy };
/**
* Classes extending the `Strategy` based class should implement this method,
* and leverage the {@link workbox-strategies.StrategyHandler}
* arg to perform all fetching and cache logic, which will ensure all relevant
* cache, cache options, fetch options and plugins are used (per the current
* strategy instance).
*
* @name _handle
* @instance
* @abstract
* @function
* @param {Request} request
* @param {workbox-strategies.StrategyHandler} handler
* @return {Promise<Response>}
*
* @memberof workbox-strategies.Strategy
*/