39 lines
1.4 KiB
TypeScript
39 lines
1.4 KiB
TypeScript
import { eachSeries } from 'async'
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import { NextFunction, Request, RequestHandler, Response } from 'express'
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import { ValidationChain } from 'express-validator'
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import { ExpressPromiseHandler } from '@server/types/express-handler'
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import { retryTransactionWrapper } from '../helpers/database-utils'
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// Syntactic sugar to avoid try/catch in express controllers
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// Thanks: https://medium.com/@Abazhenov/using-async-await-in-express-with-node-8-b8af872c0016
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export type RequestPromiseHandler = ValidationChain | ExpressPromiseHandler
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function asyncMiddleware (fun: RequestPromiseHandler | RequestPromiseHandler[]) {
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return (req: Request, res: Response, next: NextFunction) => {
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if (Array.isArray(fun) === true) {
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return eachSeries(fun as RequestHandler[], (f, cb) => {
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Promise.resolve(f(req, res, err => cb(err)))
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.catch(err => next(err))
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}, next)
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}
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return Promise.resolve((fun as RequestHandler)(req, res, next))
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.catch(err => next(err))
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}
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}
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function asyncRetryTransactionMiddleware (fun: (req: Request, res: Response, next: NextFunction) => Promise<any>) {
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return (req: Request, res: Response, next: NextFunction) => {
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return Promise.resolve(
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retryTransactionWrapper(fun, req, res, next)
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).catch(err => next(err))
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}
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}
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// ---------------------------------------------------------------------------
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export {
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asyncMiddleware,
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asyncRetryTransactionMiddleware
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}
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