designpatterns/strategy/strategy_factory.go

package strategy

import "designpatterns/factory"

type CashFactoryStrategyContext struct {
	d                   int
	cashFactoryStrategy factory.Casher
}

func (c *CashFactoryStrategyContext) GetCash() {
	switch c.d {
	case 1:
		c.cashFactoryStrategy = &factory.CashNormal{}
	case 2:
		c.cashFactoryStrategy = &factory.CashRebate{MoneyRebate: 0.8}
	case 3:
		c.cashFactoryStrategy = &factory.CashReturn{MoneyReturn: 5, MoneyCondition: 100}
	}
}

func (c *CashFactoryStrategyContext) GetResult(money float64) float64 {
	return c.cashFactoryStrategy.AcceptCash(money)
}