Sample module used for raising Slack Alarms

Slack Alarm.js

   const axios = require("axios");
   const moment = require("moment");
   const slackConfig = require("./slack.config.json");

   let buildMarkdown = (err) => {
     let output = "";

     output += `Something went wrong on our application! :boom:\n`;
     output += `*Lambda Function Name:* ${process.env.AWS_LAMBDA_FUNCTION_NAME}\n`;
     output += `*Error Message:* [${err.message}]\n`;
     output += `*Stack Trace:*\n`;
     output += "```";
     output += `${err.stack}`;
     output += "```";
     output += `\n`;

     return output;
   };

   /**
    * @module slackNotifier
    * @description Module used for sending messages to Slack Channels.
    * @author Allan A. Chua
    * @version 1.0
    * @since August 22, 2020
    */
   module.exports = {
     /**
      * @function sendAlert
      * @description Method used for sending ChatOps alerts to slack channel.
      * @param {Error} appError Application Error instance.
      * @returns {Promise<object>} Promise indicating completion of request.
      */
     sendAlert(appError) {
       let payload = {
         channel: slackConfig.slackChannelName,
         attachments: [
           {
             author_name: "Alarm Bot",
             text: buildMarkdown(appError),
             mrkdwn: true,
             color: "#FF0000",
             ts: moment().unix(),
           },
         ],
       };

       return new Promise((resolve, reject) => {
         axios
           .post(slackConfig.slackHookUrl, payload)
           .then(() => {
             resolve({ completed: true });
           })
           .catch((error) => {
             reject({ completed: false, error });
           });
       });
     },
   };