bot18/node_modules/blessed-contrib/lib/widget/picture.js

A high-frequency cryptocurrency trading bot by Zenbot creator @carlos8f

var blessed = require('blessed')
   , Node = blessed.Node
   , Box = blessed.Box
   , pictureTube = require('picture-tube')
   , fs = require('fs')
   , stream = require('stream')
   , streams = require('memory-streams')
   , MemoryStream = require('memorystream')

function Picture(options) {
  var self = this

  if (!(this instanceof Node)) {
    return new Picture(options);
  }

  options = options || {};
  options.cols = options.cols || 50
  this.options = options
  
  if (options.file || options.base64) {
    this.setImage(options)
  }

  Box.call(this, options);
}

Picture.prototype.setImage = function(options) {

  var tube = pictureTube( { cols: options.cols } )

  if (options.file) fs.createReadStream(options.file).pipe(tube)
  else if (options.base64) {
    var memStream = new MemoryStream()
    memStream.pipe(tube)
    var buf = new Buffer(options.base64, 'base64')
    memStream.write(buf)
    memStream.end()
  }

  this.writer = new streams.WritableStream();
  tube.pipe(this.writer)

  tube.on('end', function() {
    if (options.onReady) {
      options.onReady()
    }
  });

}

Picture.prototype.render = function() {
  this.setContent(this.writer.toString())
  return this._render()
}

Picture.prototype.getOptionsPrototype = function() {
  
  return { base64:'AAAA'
         , cols: 1 }
         
}

Picture.prototype.__proto__ = Box.prototype;

Picture.prototype.type = 'picture';

module.exports = Picture