From 920c55741101874e0eaf449b69ca7ef113e71085 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Minelli?= <michael@minelli.me>
Date: Tue, 30 May 2023 18:05:02 +0200
Subject: [PATCH] Add a middleware for params validation
---
.../middlewares/ParamsValidatorMiddleware.ts | 40 +++++++++++++++++++
1 file changed, 40 insertions(+)
create mode 100644 ExpressAPI/src/middlewares/ParamsValidatorMiddleware.ts
diff --git a/ExpressAPI/src/middlewares/ParamsValidatorMiddleware.ts b/ExpressAPI/src/middlewares/ParamsValidatorMiddleware.ts
new file mode 100644
index 0000000..7bf77bf
--- /dev/null
+++ b/ExpressAPI/src/middlewares/ParamsValidatorMiddleware.ts
@@ -0,0 +1,40 @@
+import * as ExpressValidator from 'express-validator';
+import express from 'express';
+import { StatusCodes } from 'http-status-codes';
+import ApiRequest from '../models/ApiRequest';
+
+
+class ParamsValidatorMiddleware {
+ private static _instance: ParamsValidatorMiddleware;
+
+ private constructor() { }
+
+ public static get instance(): ParamsValidatorMiddleware {
+ if ( !ParamsValidatorMiddleware._instance ) {
+ ParamsValidatorMiddleware._instance = new ParamsValidatorMiddleware();
+ }
+
+ return ParamsValidatorMiddleware._instance;
+ }
+
+ validate(validations: Array<ExpressValidator.ValidationChain> | ExpressValidator.Schema): (req: ApiRequest, res: express.Response, next: express.NextFunction) => void {
+ return async (req: ApiRequest, res: express.Response, next: express.NextFunction) => {
+
+ if ( !(validations instanceof Array) ) {
+ validations = ExpressValidator.checkSchema(validations);
+ }
+
+ await Promise.all(validations.map(validation => validation.run(req)));
+
+ const errors = ExpressValidator.validationResult(req);
+ if ( !errors.isEmpty() ) {
+ return req.session.sendResponse(res, StatusCodes.BAD_REQUEST, { errors: errors.array() });
+ }
+
+ return next();
+ };
+ }
+}
+
+
+export default ParamsValidatorMiddleware.instance;
--
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