]>
Commit | Line | Data |
---|---|---|
1 | import { eachSeries } from 'async' | |
2 | import { NextFunction, Request, RequestHandler, Response } from 'express' | |
3 | import { retryTransactionWrapper } from '../helpers/database-utils' | |
4 | ||
5 | // Syntactic sugar to avoid try/catch in express controllers | |
6 | // Thanks: https://medium.com/@Abazhenov/using-async-await-in-express-with-node-8-b8af872c0016 | |
7 | ||
8 | export type RequestPromiseHandler = (req: Request, res: Response, next: NextFunction) => Promise<any> | |
9 | ||
10 | function asyncMiddleware (fun: RequestPromiseHandler | RequestPromiseHandler[]) { | |
11 | return (req: Request, res: Response, next: NextFunction) => { | |
12 | if (Array.isArray(fun) === true) { | |
13 | return eachSeries(fun as RequestHandler[], (f, cb) => { | |
14 | Promise.resolve(f(req, res, cb)) | |
15 | .catch(err => next(err)) | |
16 | }, next) | |
17 | } | |
18 | ||
19 | return Promise.resolve((fun as RequestHandler)(req, res, next)) | |
20 | .catch(err => next(err)) | |
21 | } | |
22 | } | |
23 | ||
24 | function asyncRetryTransactionMiddleware (fun: RequestPromiseHandler) { | |
25 | return (req: Request, res: Response, next: NextFunction) => { | |
26 | return Promise.resolve( | |
27 | retryTransactionWrapper(fun, req, res, next) | |
28 | ).catch(err => next(err)) | |
29 | } | |
30 | } | |
31 | ||
32 | // --------------------------------------------------------------------------- | |
33 | ||
34 | export { | |
35 | asyncMiddleware, | |
36 | asyncRetryTransactionMiddleware | |
37 | } |