AWS CodeDeploy Lamda formatter for Slack messages - node.js

gistfile1.txt

var services = '/services/...';  // Update this with your Slack service...
var channel = "#aws-deployments"  // And this with the Slack channel

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

var formatFields = function(string) {
  var
    message = JSON.parse(string),
    fields  = [],
    deploymentOverview;

  // Make sure we have a valid response
  if (message) {
    fields = [
      {
        "title" : "Task",
        "value" : message.eventTriggerName,
        "short" : true
      },
      {
        "title" : "Status",
        "value" : message.status,
        "short" : true
      },
      {
        "title" : "Application",
        "value" : message.applicationName,
        "short" : true
      },
      {
        "title" : "Deployment Group",
        "value" : message.deploymentGroupName,
        "short" : true
      },
      {
        "title" : "Region",
        "value" : message.region,
        "short" : true
      },
      {
        "title" : "Deployment Id",
        "value" : message.deploymentId,
        "short" : true
      },
      {
        "title" : "Create Time",
        "value" : message.createTime,
        "short" : true
      },
      {
        "title" : "Complete Time",
        "value" : ((message.completeTime) ? message.completeTime : ''),
        "short" : true
      }
    ];

    if (message.deploymentOverview) {
     deploymentOverview = JSON.parse(message.deploymentOverview);
     
      fields.push(
        {
          "title" : "Succeeded",
          "value" : deploymentOverview.Succeeded,
          "short" : true
        },
        {
          "title" : "Failed",
          "value" : deploymentOverview.Failed,
          "short" : true
        },
        {
          "title" : "Skipped",
          "value" : deploymentOverview.Skipped,
          "short" : true
        },
        {
          "title" : "In Progress",
          "value" : deploymentOverview.InProgress,
          "short" : true
        },
        {
          "title" : "Pending",
          "value" : deploymentOverview.Pending,
          "short" : true
        }
      );
    }
  }

  return fields;

}

exports.handler = function(event, context) {

    var postData = {
        "channel": channel,
        "username": "AWS SNS via Lamda :: CodeDeploy Status",
        "text": "*" + event.Records[0].Sns.Subject + "*",
        "icon_emoji": ":aws:"
    };

    var fields = formatFields(event.Records[0].Sns.Message);
    var message = event.Records[0].Sns.Message;
    var severity = "good";

    var dangerMessages = [
        " but with errors",
        " to RED",
        "During an aborted deployment",
        "FAILED",
        "Failed to deploy application",
        "Failed to deploy configuration",
        "has a dependent object",
        "is not authorized to perform",
        "Pending to Degraded",
        "Stack deletion failed",
        "Unsuccessful command execution",
        "You do not have permission",
        "Your quota allows for 0 more running instance"];

    var warningMessages = [
        " aborted operation.",
        " to YELLOW",
        "Adding instance ",
        "Degraded to Info",
        "Deleting SNS topic",
        "is currently running under desired capacity",
        "Ok to Info",
        "Ok to Warning",
        "Pending Initialization",
        "Removed instance ",
        "Rollback of environment"
        ];

    for(var dangerMessagesItem in dangerMessages) {
        if (message.indexOf(dangerMessages[dangerMessagesItem]) != -1) {
            severity = "danger";
            break;
        }
    }

    // Only check for warning messages if necessary
    if (severity == "good") {
        for(var warningMessagesItem in warningMessages) {
            if (message.indexOf(warningMessages[warningMessagesItem]) != -1) {
                severity = "warning";
                break;
            }
        }
    }

    postData.attachments = [
        {
            "color": severity,
            "fields": fields
        }
    ];

    var options = {
        method: 'POST',
        hostname: 'hooks.slack.com',
        port: 443,
        path: services  // Defined above
    };

    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();
};

Please can anyone make a guide how this work, Its super confusing

Its working thanks.One issue I see deployment time in UTC on slack, is there any way we can change that