Whitelist request paths

WHITELIST_REQUEST_PATHS.ts

import { Middleware, ExpressMiddlewareInterface } from 'routing-controllers';
import express from 'express';

/**
 * Regular expression pattern for whitelisting request paths.
 * Each pattern represents an allowed HTTP method and path.
 */
const whiteListedPathsPattern = new RegExp(
  [
    `^GET /api/user$`,
    `^POST /api/app//products/search$`,
    `^POST /api/app/uninstall$`,
    `^POST /api/app/disconnect$`,
    `^GET /api/app/complaince/[a-z_]*$`,
    `^POST /api/notification/brand$`,
  ].join('|')
);

/**
 * Express middleware to skip authentication for listed paths.
 */
@Middleware({ type: 'before' })
export class SkipUserAuthMiddleware implements ExpressMiddlewareInterface {
  /**
   * Checks if the request path matches any whitelisted path and sets a flag to skip user auth.
   * 
   * @param request - Express request object
   * @param _response - Express response object
   * @param next - Next middleware function
   */
  use(request: express.Request, _response: any, next: (err?: any) => any): void {
    // Construct the URL string from the HTTP method and path
    const url = `${request.method} ${request.originalUrl.split('?')[0]}`;

    // Check if the URL matches any whitelisted path
    if (whiteListedPathsPattern.test(url)) {
      (request as any).skipAuth = true; // Set a flag to skip user authentication
    }

    next();  // Continue to the next middleware
  }
}