通过手机案例理解Go设计模式之装饰器模式的功能属性

type Phone interface {
  SelectColor(color string) string
  GetPrice() int
}

type BasePhone struct {
  Size   int
  Price  int
  Color  string
  Memory int
  Pixel  int
}
func (p *BasePhone) SelectColor(color string) string {
  p.Color = color
  return color
}
func (p *BasePhone) GetPrice() int {
  return p.Price
}

type CameraPhone struct {
  BasePhone BasePhone
}
func (c *CameraPhone) SelectColor(color string) string {
  return c.BasePhone.SelectColor(color)
}
func (c *CameraPhone) GetPrice() int {
  return c.BasePhone.GetPrice() + CM
}
func (c *CameraPhone) GetPixel() int {
  c.BasePhone.Pixel += 50000000
  return c.BasePhone.Pixel
}

type PhonePlus struct {
  BasePhone BasePhone
}
func (p *PhonePlus) SelectColor(color string) string {
  p.BasePhone.SelectColor(color)
  return p.BasePhone.Color
}
func (p *PhonePlus) GetPrice() int {
  return p.BasePhone.GetPrice() + MP
}
func (p *PhonePlus) GetMemory() int {
  return p.BasePhone.Memory + 128*1024
}

type PhonePlusPlus struct {
  PhonePlus PhonePlus
}
func (p *PhonePlusPlus) SelectColor(color string) string {
  return p.PhonePlus.SelectColor(color)
}
func (p *PhonePlusPlus) GetPrice() int {
  return p.PhonePlus.GetPrice() + MP
}
func (p *PhonePlusPlus) GetPixel() int {
  return p.PhonePlus.BasePhone.Pixel + 50000000
}
func (p *PhonePlusPlus) GetMemory() int {
  return p.PhonePlus.GetMemory() + 128*1024
}

package main
import "fmt"
func main() {
  basePhone := BasePhone{
      Size:   1000,
      Color:  "red",
      Price:  1000,
      Memory: 128 * 1024,
      Pixel:  50000000,
  }
  fmt.Printf("基础版的价格: %d, 颜色: %s, 像素为：%d, 内存为: %d\n", basePhone.GetPrice(), basePhone.SelectColor("纯黑"), basePhone.Pixel, basePhone.Memory)
  camaraPhone := CameraPhone{
      BasePhone: basePhone,
  }
  fmt.Printf("拍照版的价格: %d, 颜色: %s, 像素为：%d, 内存为: %d\n", camaraPhone.GetPrice(), camaraPhone.SelectColor("宝石蓝"), camaraPhone.GetPixel(), camaraPhone.BasePhone.Memory)
  phonePlus := PhonePlus{
      BasePhone: basePhone,
  }
  fmt.Printf("plus版的价格: %d, 颜色: %s, 像素为：%d, 内存为: %d\n", phonePlus.GetPrice(), phonePlus.SelectColor("玫瑰金"), phonePlus.BasePhone.Pixel, phonePlus.GetMemory())
  phonePlusPlus := PhonePlusPlus{
      PhonePlus: phonePlus,
  }
  fmt.Printf("plus Plus版的价格: %d, 颜色: %s, 像素为：%d, 内存为: %d\n", phonePlusPlus.GetPrice(), phonePlusPlus.SelectColor("青山黛"), phonePlusPlus.GetPixel(), phonePlusPlus.GetMemory())
}