YouTrack JavaScript Workflow example: Post to Slack on specific issue state changes

youtrack-notify-slack.js

var entities = require('v1/entities');
var http = require('v1/http');

exports.rule = entities.Issue.onChange({
  title: 'Notify-slack',
  action: function(ctx) {
    var issue = ctx.issue;

    if (issue.becomesReported || issue.becomesResolved || issue.becomesUnresolved) {

      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;

      //todo palette seems like it should go in a "custom script" to allow reuse. 
      //And, is there no way to get the color from the API??
      var paletteString = "#FFFFFF,#8d5100,#ce6700,#409600,#0070e4,#900052,#0050a1,#2f9890,#8e1600," +
        "#dc0083,#7dbd36,#ff7123,#ff7bc3,#fed74a,#b7e281,#d8f7f3,#e6e6e6,#e6f6cf,#ffee9c,#ffc8ea,#e30000," +
        "#e0f1fb,#fce5f1,#f7e9c1,#92e1d5,#a6e0fc,#e0c378,#bababa,#25beb2,#42a3df,#878787,#4d4d4d,#246512,#00665e,#553000,#1a1a1a";
      var palette = paletteString.split(",");
      var color = palette[issue.Priority.colorIndex];

      if (!color) {
        color = "#edb431";
      }

      var milestone = '',
        priority = '',
        state = '',
        assignee = '',
        changedByTitle = '',
        changedByName = '';

      if (issue.fields.Milestone) milestone = issue.fields.Milestone.name;
      if (issue.Priority) priority = issue.Priority.name;
      if (issue.State) state = issue.State.name;
      if (issue.Assignee) assignee = issue.Assignee.fullName;
      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": color,
          "fields": [{
              "title": "Milestone",
              "value": milestone,
              "short": true
            },
            {
              "title": "State",
              "value": state,
              "short": true
            },
            {
              "title": "Priority",
              "value": priority,
              "short": true
            },
            {
              "title": "Assignee",
              "value": assignee,
              "short": true
            },
            {
              "title": changedByTitle,
              "value": changedByName,
              "short": true
            }
          ]
        }]
      };

      var SLACK_KEY = 'YOUR_SLACK_KEY_HERE';
      var connection = new http.Connection('https://hooks.slack.com/services/');
      var response = connection.postSync(SLACK_KEY, '', JSON.stringify(payload));
    }
  },
  requirements: {
    //
  }
});