node-red-contrib-tekosbot/nodes/chatbot-message.js

Tekos bot based on matrix

var _ = require('underscore');
var utils = require('../lib/helpers/utils');
var MessageTemplate = require('../lib/message-template-async');
var emoji = require('node-emoji');
var mustache = require("mustache");

module.exports = function(RED) {

  function ChatBotMessage(config) {
    RED.nodes.createNode(this, config);
    var node = this;
    this.message = config.message;
    let listMessages = [];
    this.answer = config.answer;
    this.parse_mode = config.parse_mode;
    this.transports = ['telegram', 'slack', 'facebook', 'smooch'];
    
    

    this.pickOne = function(messages) {
      var luck = Math.floor(Math.random() * messages.length);
      return _.isString(messages[luck]) ? messages[luck] : messages[luck].message;
    };

    this.emptyMessages = function(messages) {
      return _.isEmpty(messages) || _(messages).all(function(message) {
        // in node config elements are object, in payload are just strings
        return _.isObject(message) ? _.isEmpty(message.message) : _.isEmpty(message);
      });
    };
    
    this.on('input', function(msg) {

      var message = node.message;
      var answer = node.answer;
      var chatId = utils.getChatId(msg);
      var messageId = utils.getMessageId(msg);
      var template = MessageTemplate(msg, node);
      for (var i = 0; i < this.message.length; i++) {
          if (this.message[i].message.includes("{{")){
            
            listMessages[i] = mustache.render(this.message[i].message,msg.payload)
          }else{
            listMessages[i] = this.message[i].message;
          }
        
      }
      // check transport compatibility
      if (!utils.matchTransport(node, msg)) {
        return;
      }

      if (_.isString(node.message) && !_.isEmpty(node.message)) {
        message = node.message;
      } else if (_.isArray(listMessages) && !this.emptyMessages(listMessages)) {
        message = node.pickOne(listMessages);
      } else if (_.isString(msg.payload) && !_.isEmpty(msg.payload)) {
        message = msg.payload;
      } else if (_.isArray(msg.payload) && !this.emptyMessages(msg.payload)) {
        message = node.pickOne(msg.payload);
      } else if (_.isNumber(msg.payload)) {
        message = String(msg.payload);
      } else {
        node.error('Empty message');
      }

      template(message)
        .then(function(message) {
          // payload
          msg.payload = {
            type: 'message',
            content: emoji.emojify(message),
            chatId: chatId,
            messageId: messageId,
            inbound: false
          };
          // reply flag
          msg.payload.options = {};
          if (answer) {
            msg.payload.options.reply_to_message_id = messageId;
          }
          // send out reply
          node.send(msg);
        });
    });
  }

  RED.nodes.registerType('chatbot-message', ChatBotMessage);
};