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4e50b6a1 | 1 | import { eachSeries } from 'async' |
a2431b7d | 2 | import { NextFunction, Request, RequestHandler, Response } from 'express' |
90d4bb81 | 3 | import { retryTransactionWrapper } from '../helpers/database-utils' |
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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 | |
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7 | |
8 | export type RequestPromiseHandler = (req: Request, res: Response, next: NextFunction) => Promise<any> | |
9 | ||
10 | function asyncMiddleware (fun: RequestPromiseHandler | RequestPromiseHandler[]) { | |
eb080476 | 11 | return (req: Request, res: Response, next: NextFunction) => { |
4e50b6a1 C |
12 | if (Array.isArray(fun) === true) { |
13 | return eachSeries(fun as RequestHandler[], (f, cb) => { | |
14 | Promise.resolve(f(req, res, cb)) | |
e3a682a8 | 15 | .catch(err => next(err)) |
4e50b6a1 C |
16 | }, next) |
17 | } | |
18 | ||
19 | return Promise.resolve((fun as RequestHandler)(req, res, next)) | |
e3a682a8 | 20 | .catch(err => next(err)) |
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21 | } |
22 | } | |
23 | ||
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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 | ||
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32 | // --------------------------------------------------------------------------- |
33 | ||
34 | export { | |
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35 | asyncMiddleware, |
36 | asyncRetryTransactionMiddleware | |
eb080476 | 37 | } |