go-pattern-examples/behavior/15_strategy/strategy.go

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package strategy
import "fmt"
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//money kind
const (
RMB = "RMB"
HK = "HK"
)
//StoreContext for Store 要包存钱的上下文信息
type StoreContext struct {
Kind, CardID string
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Money int
}
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//IStore 要实现的存钱接口
type IStore interface {
Store(*StoreContext)
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}
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//MainLandCitizen 大陆居民
type MainLandCitizen struct{ Name string }
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//Store Money to bank
func (m *MainLandCitizen) Store(ctx *StoreContext) {
fmt.Println("i am: ", m.Name, "i want to store: ", ctx.Money, ctx.Kind, "to: ", ctx.CardID)
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}
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//HongKongCitizen 香港居民
type HongKongCitizen struct{ Name string }
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//Store Money to bank
func (h *HongKongCitizen) Store(ctx *StoreContext) {
fmt.Println("i am: ", h.Name, "i want to store: ", ctx.Money, ctx.Kind, "to: ", ctx.CardID)
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}
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//Bank handle moneyholder
type Bank struct {
moneyHolder IStore
}
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//Recept a user
func (b *Bank) Recept(moneyHolder IStore) {
b.moneyHolder = moneyHolder
fmt.Println("Bank: ", "Recept a New User")
}
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//AccountUserMoney 动态替换的过程在这里,这里调用任何实现了Store的接口对象
//AccountUserMoney to handle User's Money
func (b *Bank) AccountUserMoney(ctx *StoreContext) {
b.moneyHolder.Store(ctx)
fmt.Println("Bank: ", "Processing Store", ctx.Money, ctx.Kind, "to: ", ctx.CardID)
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}