From ba55296e5d110d5dc455ec8599d243cc5f54bc66 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C3=ABl=20Minelli?= <michael@minelli.me>
Date: Tue, 30 May 2023 18:20:33 +0200
Subject: [PATCH] Add manager of params (f.e. help get value from an id)
---
.../src/middlewares/ParamsCallbackManager.ts | 46 +++++++++++++++++++
1 file changed, 46 insertions(+)
create mode 100644 ExpressAPI/src/middlewares/ParamsCallbackManager.ts
diff --git a/ExpressAPI/src/middlewares/ParamsCallbackManager.ts b/ExpressAPI/src/middlewares/ParamsCallbackManager.ts
new file mode 100644
index 0000000..0c5f6b1
--- /dev/null
+++ b/ExpressAPI/src/middlewares/ParamsCallbackManager.ts
@@ -0,0 +1,46 @@
+import { Express } from 'express-serve-static-core';
+import ApiRequest from '../models/ApiRequest';
+import express from 'express';
+import { StatusCodes } from 'http-status-codes';
+
+
+class ParamsCallbackManager {
+ private static _instance: ParamsCallbackManager;
+
+ private constructor() { }
+
+ public static get instance(): ParamsCallbackManager {
+ if ( !ParamsCallbackManager._instance ) {
+ ParamsCallbackManager._instance = new ParamsCallbackManager();
+ }
+
+ return ParamsCallbackManager._instance;
+ }
+
+ protected listenParam(paramName: string, backend: Express, context: any, functionName: string, indexName: string) {
+ backend.param(paramName, (req: ApiRequest, res: express.Response, next: express.NextFunction, id: number | string) => {
+ (context[functionName] as (id: number | Array<number>) => Promise<any>)(typeof id === 'string' ? JSON.parse(id) as Array<number> : id).then(result => {
+ if ( result ) {
+ this.initBoundParams(req);
+ (req.boundParams as any)[indexName] = result;
+
+ next();
+ } else {
+ req.session.sendResponse(res, StatusCodes.NOT_FOUND, {}, 'Param bounding failed: ' + paramName);
+ }
+ });
+ });
+ }
+
+ initBoundParams(req: ApiRequest) {
+ if ( !req.boundParams ) {
+ req.boundParams = {};
+ }
+ }
+
+ register(backend: Express) {
+ }
+}
+
+
+export default ParamsCallbackManager.instance;
--
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