node-red-contrib-chatbot/nodes/chatbot-params.js

REDBot a Chat bot for a full featured chat bot for Telegram, Facebook Messenger and Slack. Almost no coding skills required

const _ = require('underscore');
const RegisterType = require('../lib/node-installer');
const {
  isValidMessage,
  getTransport,
  extractValue
} = require('../lib/helpers/utils');
const MessageTemplate = require('../lib/message-template-async');
const GlobalContextHelper = require('../lib/helpers/global-context-helper');

module.exports = function(RED) {
  const registerType = RegisterType(RED);
  const globalContextHelper = GlobalContextHelper(RED);

  function ChatBotParams(config) {
    RED.nodes.createNode(this, config);
    const node = this;
    globalContextHelper.init(this.context().global);
    this.params = config.params;

    this.on('input', function(msg, send, done) {
      // send/done compatibility for node-red < 1.0
      send = send || function() { node.send.apply(node, arguments) };
      done = done || function(error) { node.error.call(node, error, msg) };
      // check if valid message
      if (!isValidMessage(msg, node)) {
        done('Invalid input message');
        return;
      }
      // get RedBot values
      const template = MessageTemplate(msg, node, { preserveNumbers: true });
      const transport = getTransport(msg);
      // get vars
      let params = extractValue('params', 'params', node, msg);

      template(params.filter(param => param.platform === transport || param.platform === 'all'))
        .then(p => {
          // keep params set by a previous params node (if it's an object, an array means params were set
          // by an upstream node as configuration for the current one)
          const params = p.reduce(
            (accumulator, param) => ({ ...accumulator, [param.name]: param.value }),
            _.isObject(msg.payload?.params) && !_.isArray(msg.payload?.params) ? { ...msg.payload.params } : {}
          );
          send({
            ...msg,
            payload: _.isArray(msg.payload) ?
              msg.payload.map(obj => ({ ...obj, params })) : { ...msg.payload, params }
          });
          done();
        });
    });
  }

  registerType('chatbot-params', ChatBotParams);
};