Coffee Brewed Lambda Function

coffeeBrewed.js

const AWS = require('aws-sdk');
const https = require('https');
const DynamoDB = new AWS.DynamoDB();

const SLACK_PROTOCOL = 'https:';
const SLACK_HOST = 'hooks.slack.com';
const SLACK_PATH = '/services/YOUR-SLACK-PATH-HERE';

async function postToSlack(event) {
    var coffeeType = event.clickType == 'SINGLE' ? 'Regular' : 'Decaf'
    var color = event.clickType == 'SINGLE' ? '#158f64' : '#c7600c'
    var message = coffeeType + " :coffee: brewed! ";

    return new Promise((resolve, reject) => {
        const post_data = JSON.stringify({
            "attachments": [
                {
                    "fallback": message,
                    "title": message,
                    "image_url": "https://s3.amazonaws.com/centare/coffee-brewed.gif",
                    "color": color
                }
            ]
        });

        const options = {
            protocol: SLACK_PROTOCOL,
            host: SLACK_HOST,
            path: SLACK_PATH,
            method: 'POST',
            headers: {
                'Content-Type': 'Content-type: application/json',
                'Content-Length': Buffer.byteLength(post_data),
            }
        };

        const req = https.request(options, (res) => {
            res.setEncoding('utf8');
            console.log("Response status code: " + res.statusCode);
            res.on('data', function (body) {
                console.log(body);
            });
            resolve('Success');
        });

        req.on('error', (e) => {
            reject(e.message);
        });

        // send the request
        req.write(post_data);
        req.end();
    });
}

async function recordEvent(event) {
    return new Promise((resolve, reject) => {
        var item = {
            'id': { 'N': new Date().getTime().toString() },
            'serialNumber': {'S':event.serialNumber},
            'batteryVoltage': {'S':event.batteryVoltage},
            'clickType': {'S':event.clickType},
        };

        DynamoDB.putItem({
            'TableName': 'coffee_button_press',
            'Item': item
        }, function(err, data) {
            if (err) {
                console.log("Error in putItem " + err);
                reject(err.message);
            } else {
                console.log("Successfully Inserted");
                resolve('Success');
            }
        });
    });
}

exports.handler = async (event) => {

    await postToSlack(event);
    return await recordEvent(event);
};