AWS Lambda function to Slack Channel hookup

snsToSlack.js

var https = require('https');
var util = require('util');

//via http://stackoverflow.com/questions/19098797/fastest-way-to-flatten-un-flatten-nested-json-objects
function flatten(data) {
    var result = {};
    function recurse (cur, prop) {
        if (Object(cur) !== cur) {
            result[prop] = cur;
        } else if (Array.isArray(cur)) {
             for(var i=0, l=cur.length; i<l; i++)
                 recurse(cur[i], prop + "[" + i + "]");
            if (l == 0)
                result[prop] = [];
        } else {
            var isEmpty = true;
            for (var p in cur) {
                isEmpty = false;
                recurse(cur[p], prop ? prop+"."+p : p);
            }
            if (isEmpty && prop)
                result[prop] = {};
        }
    }
    recurse(data, "");
    return result;
}


function parseMessage(msg) {
    try {
        var obj = JSON.parse(msg);
        var flattened = flatten(obj);
        var info = [];
        for (var key in flattened) {
            info.push("*" + key + "*: " + flattened[key]);
        }
        return info.join("\n");
    }
    catch (e) {
        return msg;
    }
}

exports.handler = function(event, context) {
    console.log(JSON.stringify(event, null, 2));
    console.log('From SNS:', event.Records[0].Sns.Message);

    var postData = {
        // "channel": "#devops",
        // "username": "Amazon SNS",
        // "icon_emoji": ":aws:",
        "text": "*" + event.Records[0].Sns.Subject + "*"
    };

    var message = parseMessage(event.Records[0].Sns.Message);
    var butWithErrors = message.indexOf(" but with errors");
    var stateRed = message.indexOf(" to RED");
    var stateYellow = message.indexOf(" to YELLOW");
    var noPermission = message.indexOf("You do not have permission");
    var failedDeploy = message.indexOf("Failed to deploy application");
    var removedInstance = message.indexOf("Removed instance ");
    var addingInstance = message.indexOf("Adding instance ");
    var failedConfig = message.indexOf("Failed to deploy configuration");
    var failedQuota = message.indexOf("Your quota allows for 0 more running instance");
    var abortedOperation = message.indexOf(" aborted operation.");
    var color = "good";
    
    if (stateRed != -1 || butWithErrors != -1 || noPermission != -1 || failedDeploy != -1 || failedConfig != -1 || failedQuota != -1) {
        color = "danger";
    }
    if (stateYellow != -1 || removedInstance != -1 || addingInstance != -1 || abortedOperation != -1) {
        color = "warning";
    }

    postData.attachments = [
        {
            "color": color, 
            "text": message,
            "mrkdwn_in": ["text"]
        }
    ];

    var options = {
        method: 'POST',
        hostname: 'hooks.slack.com',
        port: 443,
        path: '/services/your-slack-webhook-url-info-goes-here'
    };

    var req = https.request(options, function(res) {
      res.setEncoding('utf8');
      res.on('data', function (chunk) {
        context.done(null);
      });
    });
    
    req.on('error', function(e) {
      console.log('problem with request: ' + e.message);
    });    

    req.write(util.format("%j", postData));
    req.end();
};