-import { Request, Response, NextFunction } from 'express'
+import { eachSeries } from 'async'
+import { NextFunction, Request, RequestHandler, Response } from 'express'
// Syntactic sugar to avoid try/catch in express controllers
// Thanks: https://medium.com/@Abazhenov/using-async-await-in-express-with-node-8-b8af872c0016
-function asyncMiddleware (fn: (req: Request, res: Response, next: NextFunction) => Promise<any>) {
+
+export type RequestPromiseHandler = (req: Request, res: Response, next: NextFunction) => Promise<any>
+
+function asyncMiddleware (fun: RequestPromiseHandler | RequestPromiseHandler[]) {
return (req: Request, res: Response, next: NextFunction) => {
- return Promise.resolve(fn(req, res, next))
+ if (Array.isArray(fun) === true) {
+ return eachSeries(fun as RequestHandler[], (f, cb) => {
+ Promise.resolve(f(req, res, cb))
+ .catch(next)
+ }, next)
+ }
+
+ return Promise.resolve((fun as RequestHandler)(req, res, next))
.catch(next)
}
}