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122 lines (111 loc) · 2.82 KB
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/*
* @Author: junchao
* @Date: 2021-01-06 12:18:31
* @LastEditTime: 2021-01-07 13:40:15
* @LastEditors: junchao
* @Description:
* @FilePath: /JavaScriptDesignPatterns/command/command2.js
* @可以输入预定的版权声明、个性签名、空行等
*/
// 接收者类
class Receiver {
execute(action) {
console.log(`接收者执行命令: 生产${action}`);
switch (action) {
case "书桌":
this.outputDesk();
break;
case "椅子":
this.outputChair();
break;
default:
console.log(`工厂没有生产${action}的能力，请确认订单`);
break;
}
}
// 生产书桌的方法
outputDesk() {
setTimeout(() => {
console.log('生产了一张书桌');
console.log('书桌已经生产好了，可以交给客户了');
}, 1000);
}
// 生产椅子的方法
outputChair() {
setTimeout(() => {
console.log('生产了一把椅子');
console.log('椅子已经生产好了，可以交给客户了');
}, 1000);
}
}
// 命令对象
class Command {
constructor(receiver) {
this.receiver = receiver;
}
execute(action) {
console.log(`命令对象接收到命令:${action}`);
this.receiver.execute(action)
}
}
class DeskCommand extends Command {
constructor(receiver) {
super(receiver);
}
execute() {
console.log(`接到一张书桌的订单，给工厂下命令生产一张书桌`);
this.receiver.execute('书桌');
}
}
class ChairCommand extends Command {
constructor(receiver) {
super(receiver);
}
execute() {
console.log(`接到一把椅子的订单，给工厂下命令生产一把椅子`);
this.receiver.execute('椅子');
}
}
// 发布者
class Invoker {
constructor() {
this.orderList = [];
}
// 下订单
setOrder(orderType, order) {
console.log(`接到一个订单:${orderType}`)
this.orderList.push(order);
}
// 取消订单
cancelOrder(orderType, order) {
let index = this.orderList.indexOf(order);
this.orderList.splice(index, 1);
console.log(`取消一个订单:${orderType}`);
}
// 发布命令
invoke() {
console.log(`发布者发布命令,给工厂下订单`)
this.orderList.forEach((item) => { item.execute(); });
}
}
// 仓库
const warehouse = new Receiver();
// 订单
const desk = new DeskCommand(warehouse);
const chair = new ChairCommand(warehouse);
// 客户
const client = new Invoker();
client.setOrder("书桌", desk);
client.setOrder("书桌", desk);
client.setOrder("书桌", desk);
client.setOrder("书桌", desk);
client.setOrder("椅子", chair);
client.setOrder("椅子", chair);
client.setOrder("椅子", chair);
client.setOrder("椅子", chair);
client.setOrder("椅子", chair);
client.setOrder("椅子", chair);
client.cancelOrder("书桌", desk);
setTimeout(() => {
client.invoke();
}, 1000);