Bridge Endpoint

import { type Request, type Response } from 'express';
import { NovuRequestHandler, ServeHandlerOptions } from '@novu/framework';

export const serve = (options: ServeHandlerOptions): any => {
  const requestHandler = new NovuRequestHandler({
    frameworkName: 'express',
    ...options,
    handler: (
      incomingRequest: Request,
      response: Response,
    ) => ({
        method: () => incomingRequest.method,
        headers: (key) => {
            const header = incomingRequest.headers[key];
            return Array.isArray(header) ? header[0] : header;
        },
        queryString: (key) => {
                const qs = incomingRequest.query[key];
                return Array.isArray(qs) ? qs[0] : qs;
        },
        body: () => incomingRequest.body,
        url: () => new URL(incomingRequest.url, `https://${incomingRequest.headers.get("host") || ""}`),
        transformResponse: ({ body, headers, status }) => {
            Object.entries(headers).forEach(([headerName, headerValue]) => {
              response.setHeader(headerName, headerValue);
            });

            return response.status(status).send(body);
       },
    }),
  });

  return requestHandler.createHandler();
};