source: frontend/node_modules/workbox-strategies/CacheOnly.js

/*
  Copyright 2018 Google LLC

  Use of this source code is governed by an MIT-style
  license that can be found in the LICENSE file or at
  https://opensource.org/licenses/MIT.
*/
import { assert } from 'workbox-core/_private/assert.js';
import { logger } from 'workbox-core/_private/logger.js';
import { WorkboxError } from 'workbox-core/_private/WorkboxError.js';
import { Strategy } from './Strategy.js';
import { messages } from './utils/messages.js';
import './_version.js';
/**
 * An implementation of a [cache-only](https://developer.chrome.com/docs/workbox/caching-strategies-overview/#cache-only)
 * request strategy.
 *
 * This class is useful if you want to take advantage of any
 * [Workbox plugins](https://developer.chrome.com/docs/workbox/using-plugins/).
 *
 * If there is no cache match, this will throw a `WorkboxError` exception.
 *
 * @extends workbox-strategies.Strategy
 * @memberof workbox-strategies
 */
class CacheOnly extends Strategy {
    /**
     * @private
     * @param {Request|string} request A request to run this strategy for.
     * @param {workbox-strategies.StrategyHandler} handler The event that
     *     triggered the request.
     * @return {Promise<Response>}
     */
    async _handle(request, handler) {
        if (process.env.NODE_ENV !== 'production') {
            assert.isInstance(request, Request, {
                moduleName: 'workbox-strategies',
                className: this.constructor.name,
                funcName: 'makeRequest',
                paramName: 'request',
            });
        }
        const response = await handler.cacheMatch(request);
        if (process.env.NODE_ENV !== 'production') {
            logger.groupCollapsed(messages.strategyStart(this.constructor.name, request));
            if (response) {
                logger.log(`Found a cached response in the '${this.cacheName}' ` + `cache.`);
                messages.printFinalResponse(response);
            }
            else {
                logger.log(`No response found in the '${this.cacheName}' cache.`);
            }
            logger.groupEnd();
        }
        if (!response) {
            throw new WorkboxError('no-response', { url: request.url });
        }
        return response;
    }
}
export { CacheOnly };