bluebot/plugins/mailer.js

A bitcoin trading bot for auto trading at various exchanges

var email = require("emailjs");
var _ = require('lodash');
var log = require('../core/log.js');
var util = require('../core/util.js');
var config = util.getConfig();
var mailConfig = config.mailer;

var Mailer = function(done) {
  _.bindAll(this);

  this.server;
  this.price = 'N/A';

  this.done = done;
  this.setup();
};

Mailer.prototype.setup = function(done) {
  var setupMail = function(err, result) {
    if(result) {
      console.log('Got it.');
      mailConfig.password = result.password;
    }

    if(_.isEmpty(mailConfig.to))
      mailConfig.to = mailConfig.email;
    if(_.isEmpty(mailConfig.from))
      mailConfig.from = mailConfig.email;
    if(_.isEmpty(mailConfig.user) && mailConfig.smtpauth)
      mailConfig.user = mailConfig.email;

    this.server = email.server.connect({
      user: mailConfig.user,
      password: mailConfig.password,
      host: mailConfig.server,
      ssl: mailConfig.ssl,
      port: mailConfig.port,
      tls: mailConfig.tls
    });

    if(mailConfig.sendMailOnStart) {
      this.mail(
        "BlueBot has started",
        [
          "I've just started watching ",
          config.watch.exchange,
          ' ',
          config.watch.currency,
          '/',
          config.watch.asset,
          ". I'll let you know when I got some advice"
        ].join(''),
        _.bind(function(err) {
          this.checkResults(err);
          this.done();
        }, this)
      );
    } else
      this.done();

    log.debug('Setup email adviser.');
  };

  if(!mailConfig.password) {
    // ask for the mail password
    var prompt = require('prompt-lite');
    prompt.start();
    var warning = [
      '\n\n\tYou configured BlueBot to mail you advice, BlueBot needs your email',
      'password to send emails (to you). BlueBot is an opensource project',
      ', you can take my word but always',
      'check the code yourself.',

    ].join('\n\t');
    log.warn(warning);
    prompt.get({name: 'password', hidden: true}, _.bind(setupMail, this));
  } else {
    setupMail.call(this);
  }
};

Mailer.prototype.mail = function(subject, content, done) {
  util.retry(function(cb) {
    this.server.send({
      text: content,
      from: mailConfig.from,
      to: mailConfig.to,
      subject: mailConfig.tag + subject
    }, cb);
  }.bind(this), done || this.checkResults);
};

Mailer.prototype.processCandle = function(candle, done) {
  this.price = candle.close;

  done();
};

Mailer.prototype.processAdvice = function(advice) {

  if (advice.recommendation == "soft" && mailConfig.muteSoft) return;

  var text = [
    'BlueBot is watching ',
    config.watch.exchange,
    ' and has detected a new trend, advice is to go ',
    advice.recommendation,
    '.\n\nThe current ',
    config.watch.asset,
    ' price is ',
    config.watch.currency,
    ' ',
    this.price
  ].join('');

  var subject = 'New advice: go ' + advice.recommendation;

  this.mail(subject, text);
};

Mailer.prototype.checkResults = function(err) {
  if(err)
    log.warn('error sending email', err);
  else
    log.info('Send advice via email.');
};

module.exports = Mailer;