PlatformExpressStatics.ts

import {IServerMountDirectories, PlatformApplication} from "@tsed/common";
import {Injectable} from "@tsed/di";
import * as Express from "express";

// istanbul ignore next
function statics(directory: string) {
  const middleware = Express.static(directory);

  return (request: any, response: any, next: any) => {
    if (!response.headersSent) {
      middleware(request, response, next);
    } else {
      next();
    }
  };
}

@Injectable()
export class PlatformExpressStatics {
  constructor(private platformApplication: PlatformApplication) {}

  statics(statics: IServerMountDirectories) {
    /* istanbul ignore else */
    Object.keys(statics).forEach(path => {
      [].concat(statics[path] as any).forEach((directory: string) => this.mount(path, directory));
    });
  }

  mount(path: string, directory: string) {
    this.platformApplication.use(path, statics(directory));
  }
}