logging.ts

import { Event } from '../helpers/http'; // this is a custom type for the Netlify event object
import fetch from "node-fetch";

// used for `sec-ch-ua-mobile` header value conversion to boolean
function convertToBoolean(value: string): boolean | null {
  if (value === '') return null;

  if (value === '?0') {
    return false;
  } else {
    return true;
  }
}

// main function to send log data to SumoLogic
async function sendToSumo(url: string, logData: any): Promise<void>{
    console.info('sending to sumo...');

    const response = await fetch(url, {
        method: 'POST',
        headers: {
            'Content-Type': 'application/json'
        },
        body: JSON.stringify(logData)
    });

    if (!response.ok) {
        throw new Error(`Failed to send event to Sumo Logic: ${response.statusText}`);
    }

    console.info(`SUMO RESPONSE:\n${JSON.stringify(response, null, 2)}`);
}

// this is the function that will be exported and used in your Netlify functions
export const logRequest = async (page: string, jwtId: string, event: Event) => {
  try {
    const logData = {
      jwtId: jwtId,
      page: page,
      httpMethod: event.httpMethod,
      queryStringParameters: event.queryStringParameters || null,
      clientConnectionIp: event.headers['x-nf-client-connection-ip'] || null,
      country: event.headers['x-country'] || null,
      userAgent: event.headers['user-agent'] || null,
      referer: event.headers['referer'] || null,
      forwardedFor: event.headers['x-forwarded-for'] || null,
      forwardedProtocol: event.headers['x-forwarded-proto'] || null,
      language: event.headers['x-language'] || null,
      origin: event.headers['origin'] || null,
      platform: event.headers['sec-ch-ua-platform'] || null,
      netlifyRequestId: event.headers['x-nf-request-id'] || null,
      isMobile: convertToBoolean(event.headers['sec-ch-ua-mobile'] || ''),
    };
    console.info(`PAGE REQUEST\n${JSON.stringify(logData, null, 2)}`);
    await sendToSumo(`${process.env.SUMO_REQUEST_SOURCE_URL}`, logData);
  } catch (error) {
    console.error(`logRequest error: ${error}`);
  }
};