text: import { ReadStream } from "fs";
  import { Service } from "./service.js";
  
  export class Controller {
      constructor() {
          this.service = new Service();
      }
  
      /**
       * @param {string} filename
       * @returns {Promise<{stream: ReadStream, type: string}>} Promise<{stream: ReadStream, type: string}>
       */
      async getFileStream(filename) {
          return this.service.getFileStream(filename);
      }
  }
  