command.go

// Package command 命令模式
package command

// CookCommand 做饭指令接口
type CookCommand interface {
	Execute() string // 指令执行方法
}

// steamRiceCommand 蒸饭指令
type steamRiceCommand struct {
	electricCooker *ElectricCooker // 电饭煲
}

func NewSteamRiceCommand(electricCooker *ElectricCooker) *steamRiceCommand {
	return &steamRiceCommand{
		electricCooker: electricCooker,
	}
}

func (s *steamRiceCommand) Execute() string {
	s.electricCooker.SetFire("中")
	s.electricCooker.SetPressure("正常")
	return "蒸饭:" + s.electricCooker.Run("30分钟")
}

// cookCongeeCommand 煮粥指令
type cookCongeeCommand struct {
	electricCooker *ElectricCooker
}

func NewCookCongeeCommand(electricCooker *ElectricCooker) *cookCongeeCommand {
	return &cookCongeeCommand{
		electricCooker: electricCooker,
	}
}

func (c *cookCongeeCommand) Execute() string {
	c.electricCooker.SetFire("大")
	c.electricCooker.SetPressure("强")
	return "煮粥:" + c.electricCooker.Run("45分钟")
}

// shutdownCommand 停止指令
type shutdownCommand struct {
	electricCooker *ElectricCooker
}

func NewShutdownCommand(electricCooker *ElectricCooker) *shutdownCommand {
	return &shutdownCommand{
		electricCooker: electricCooker,
	}
}

func (s *shutdownCommand) Execute() string {
	return s.electricCooker.Shutdown()
}

// ElectricCookerInvoker 电饭煲指令触发器
type ElectricCookerInvoker struct {
	cookCommand CookCommand
}

// SetCookCommand 设置指令
func (e *ElectricCookerInvoker) SetCookCommand(cookCommand CookCommand) {
	e.cookCommand = cookCommand
}

// ExecuteCookCommand 执行指令
func (e *ElectricCookerInvoker) ExecuteCookCommand() string {
	return e.cookCommand.Execute()
}