Class CacheTable

packages/service-worker/worker/src/db-cache.ts:53–89

 * A `Table` backed by a `Cache`.
 */
export class CacheTable implements Table {
  cacheName: string;

  constructor(
    readonly name: string,
    private cache: NamedCache,
    private adapter: Adapter,
    private cacheQueryOptions?: CacheQueryOptions,
  ) {
    this.cacheName = this.cache.name;
  }

  private request(key: string): Request {
    return this.adapter.newRequest('/' + key);
  }

  'delete'(key: string): Promise<boolean> {
    return this.cache.delete(this.request(key), this.cacheQueryOptions);
  }

  keys(): Promise<string[]> {
    return this.cache.keys().then((requests) => requests.map((req) => req.url.slice(1)));
  }

  read(key: string): Promise<any> {
    return this.cache.match(this.request(key), this.cacheQueryOptions).then((res) => {
      if (res === undefined) {
        return Promise.reject(new NotFound(this.name, key));
      }
      return res.json();
    });
  }

  write(key: string, value: Object): Promise<void> {
    return this.cache.put(this.request(key), this.adapter.newResponse(JSON.stringify(value)));
  }
}