Express JS: Handling endpoints dynamically with classes

// main.js import { registerEndpoints } './utils/registry' const express = require("express"); const Application = express(); (async () => { await registerEndpoints(Application, "../routes"); })(); 

// src/utils/registry  export async function registerEndpoints( application: Application, dir: string = "" ) { const filePath = path.join(__dirname, dir); const files = await fs.readdir(filePath); const originalDir = dir; for (const file of files) { const stat = await fs.lstat(path.join(filePath, file)); if (stat.isDirectory()) registerEndpoints(application, path.join(dir, file)); if (file.endsWith(".js") || file.endsWith(".ts")) { const { default: Endpoint } = await import(path.join(dir, file)); const endpoint = new Endpoint(); application.use(endpoint.path, endpoint.run); } } } 

// src/utils/structures/BaseRoute export default abstract class BaseRoute { constructor(private path: string) {} getPath(): string { return this.path; } abstract run(req, res, next): void; } 

// src/routes/mySingleCallbackRoute.ts import BaseRoute from "src/utils/structures/BaseRoute"; export default class mySingleCallbackRoute extends BaseRoute { constructor() { super("/mySingleCallbackRoute"); } async run(req, res) { res.send("Hello!") } } 

// src/routes/myMultipleCallbacksRoute.ts import BaseRoute from "src/utils/structures/BaseRoute"; function Multiple(...functions) { return function ( target: Object, key: string | symbol, descriptor: PropertyDescriptor ) { const original = descriptor.value; descriptor.value = function (...args: any[]) { functions.forEach((func) => func(...args)); original.apply(this, args); }; return descriptor; }; } export default class myMultipleCallbacksRoute extends BaseRoute { constructor() { super("/myMultipleCallbacksRoute"); } @Multiple( function (_, __, next) { console.log("Middleware could be here :eyes:"); next(); }, function (req, __, next) { if (req.body.id) { console.log( "Maybe only return next callback only if req.body.id was provided :eyes:" ); } next(); } ) async run(req, res) { res.send("Hello!"); } }