Report youtrack changes to slack with duedate and approval

slackreport.js

// Thanks to Michael Rush for the original version of this rule (https://software-development.dfstudio.com/youtracks-new-javascript-workflows-make-slack-integration-a-breeze-d3275605d565)

// IMPORTANT: Use a valid Incoming Webhook from Slack. To get one, go to https://my.slack.com/services/new/incoming-webhook/
var SLACK_WEBHOOK_URL = 'WEBHOOKURL';

var entities = require('@jetbrains/youtrack-scripting-api/entities');
var http = require('@jetbrains/youtrack-scripting-api/http');
var workflow = require('@jetbrains/youtrack-scripting-api/workflow');

exports.rule = entities.Issue.onChange({
  title: workflow.i18n('Send notification to slack when an issue is reported, resolved, or reopened'),
  guard: function(ctx) {
    return ctx.issue.becomesReported || ctx.issue.becomesResolved || ctx.issue.becomesUnresolved;
  },
  action: function(ctx) {
    var issue = ctx.issue;

    var issueLink = '<' + issue.url + "|" + issue.id + '>';
    var message, isNew;

    if (issue.becomesReported) {
      message = "Created: ";
      isNew = true;
    } else if (issue.becomesResolved) {
      message = "Resolved: ";
      isNew = false;
    } else if (issue.becomesUnresolved) {
      message = "Reopened: ";
      isNew = false;
    }
    message += issue.summary;

    var changedByTitle = '',
      changedByName = '';

    if (isNew) {
      changedByTitle = "Created By";
      changedByName = issue.reporter.fullName;
    } else {
      changedByTitle = "Updated By";
      changedByName = issue.updatedBy.fullName;
    }

    var payload = {
      "attachments": [{
        "fallback": message + " (" + issueLink + ")",
        "pretext": message + " (" + issueLink + ")",
        "color": issue.fields.Priority.backgroundColor || "#edb431",
        "fields": [{
          "title": "State",
          "value": issue.fields.State.name,
          "short": true
        },
          {
            "title": "Priority",
            "value": issue.fields.Priority.name,
            "short": true
          },
                   {
                     "title" : "Approval",
                     "value" : issue.fields.Approval.name,
                     "short" : true
                   },
          {
            "title": "Assignee",
            "value": issue.fields.Assignee ? issue.fields.Assignee.fullName : '',
            "short": true
          },
          {
           "title":"Due Date",
           "value": issue.fields.DueDate,
           "short": true
           },
          {
            "title": changedByTitle,
            "value": changedByName,
            "short": true
          }
        ]
      }]
    };

    var connection = new http.Connection(SLACK_WEBHOOK_URL, null, 2000);
    var response = connection.postSync('', null, JSON.stringify(payload));
    if (!response.isSuccess) {
      console.warn('Failed to post notification to Slack. Details: ' + response.toString());
    }
  },
  requirements: {
    Priority: {
      type: entities.EnumField.fieldType
    },
    State: {
      type: entities.State.fieldType
    },
    Assignee: {
      type: entities.User.fieldType
    }
  }
});