slack-webhooks-handler/lib/dispatcher.js

Manage incoming webhooks to send messages to Slack

"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = void 0;

var _webhook = require("@slack/webhook");

class Dispatcher {
  constructor(options = {}) {
    if (!options.url) {
      throw new Error('Slack Webhook URL is required');
    }

    if (!options.botName) {
      throw new Error('bot name is required');
    }

    this.webhook = new _webhook.IncomingWebhook(options.url);
    this.username = options.botName;
    this.text = '';
    this.channel = '';
    this.payload = null;
    this.attachments = [];
  }

  setMessage(text = '') {
    this.text = text;
  }

  setChannel(channel = '') {
    this.channel = channel;
  }

  hasAttachments() {
    return !(this.attachments.length === 0);
  }

  withAttachments(attachments) {
    this.attachments = attachments;
  }

  preparePayload() {
    const payload = {
      username: this.username,
      text: this.text,
      attachments: this.attachments
    };

    if (this.channel !== '') {
      payload.channel = this.channel;
    }

    this.payload = payload;
  }

  async send() {
    if (!this.hasAttachments() && this.text === '') {
      throw new Error('Cannont send message. Either set a text or attachments.');
    }

    this.preparePayload();
    return this.webhook.send(this.payload);
  }

}

exports.default = Dispatcher;