DesignPatterns: Adapter (javascript)

adapter.js

function Circle(x, y, r) {
  this.x = x
  this.y = y
  this.r = r
}

Circle.prototype.draw = function(canvas) {
  console.log('circle of radius', this.r, 'draw with', 'x', this.x, 'y', this.y, 'position')
}

function ExternalLibCircle(r) {
   this.r = r
}

ExternalLibCircle.prototype.complexDraw = function(canvas, x, y) {
  console.log('external draw of radius', this.r, 'with position', 'x', x, 'y', y)
}

function LibCircleAdapter(x, y, r) {
  let externalLibCircle = new ExternalLibCircle(r)
  
  return {
    x: x,
    y: y,
    draw: function(canvas) {
      externalLibCircle.complexDraw(canvas, this.x, this.y)
    }
  }
}

function run() {
  let shapes = []
  shapes.push(new Circle(1, 1, 3))
  shapes.push(new LibCircleAdapter(4, 2, 2))
  let canvas = {}
  
  shapes.forEach((shape) => {
    shape.draw(canvas)
  })
}