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main.go
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main.go
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package main
import "fmt"
// 1.创建接口
type Manager interface {
HaveRight(money int) bool //有权做
HandleFeeRequest(name string, money int) bool //处理费用请求
}
// 2, 创建请求链
type RequestChain struct {
Manager
successor *RequestChain //后续者(链式结构,链表)
}
func (rc *RequestChain) HaveRight(money int) bool {
return true
}
func (rc *RequestChain) HandleFeeRequest(name string, money int) bool {
//先判断金额在对应的部门是否有权限
if rc.Manager.HaveRight(money) {
return rc.Manager.HandleFeeRequest(name, money) //如果有权限,处理请求
}
//继任者不为空,传递到继任者处理
if rc.successor != nil {
return rc.successor.HandleFeeRequest(name, money)
}
return false
}
//赋值下一个继任者
func (rc *RequestChain) SetSuccessor(m *RequestChain) {
rc.successor = m
}
// 3. 项目经理
type ProjectManager struct{}
func (pm *ProjectManager) HaveRight(money int) bool {
return money < 500 // 金额在500元以下有权限
}
func (pm *ProjectManager) HandleFeeRequest(name string, money int) bool {
if name == "浦东新区" {
fmt.Printf("工程管理拥有权限,%v:%v\n", name, money)
return true
}
fmt.Printf("工程管理没有权限,%v:%v\n", name, money)
return false
}
func NewProjectManager() *RequestChain {
return &RequestChain{
Manager: &ProjectManager{},
successor: nil,
}
}
// 3. 地区经理
type DepManager struct{}
func (dm *DepManager) HaveRight(money int) bool {
return money < 5000 // 金额在5000元以下有权限
}
func (dm *DepManager) HandleFeeRequest(name string, money int) bool {
if name == "上海市" {
fmt.Printf("部门管理授权通过,%v:%v\n", name, money)
return true
}
fmt.Printf("部门管理未授权,%v:%v\n", name, money)
return false
}
func NewDepManager() *RequestChain {
return &RequestChain{
Manager: &DepManager{},
successor: nil,
}
}
// 3. 总经理
type GeneralManager struct{}
func (gm *GeneralManager) HaveRight(money int) bool {
return true // 至高无上的权限
}
func (gm *GeneralManager) HandleFeeRequest(name string, money int) bool {
if name == "中央" {
fmt.Printf("全体管理授权通过,%v:%v\n", name, money)
return true
}
fmt.Printf("全体管理未授权,%v:%v\n", name, money)
return false
}
func NewGeneralManager() *RequestChain {
return &RequestChain{
Manager: &GeneralManager{},
successor: nil,
}
}
// 主体逻辑
func main() {
c1 := NewProjectManager()
c2 := NewDepManager()
c3 := NewGeneralManager()
//责任传递方向: c1---->c2----->c3
c1.SetSuccessor(c2)
c2.SetSuccessor(c3)
var c Manager = c1
//c.HandleFeeRequest("浦东新区", 400)
//c.HandleFeeRequest("上海市", 1400)
//c.HandleFeeRequest("中央", 10000)
c.HandleFeeRequest("天津市", 4000)
}