【JS】415- JS面向对象之 7 大基本原则

class ShoppinCar {
    constructor(){
        this.goods = [];
    }
    addGoods(good){
        this.goods = [good];
    }
    getGoodsList(){
        return this.goods;
    }
}
class Settlement {
    constructor(){
        this.result = 0; 
    }
    calculatePrice(list,key){
        let allPrice = 0;
        list.forEach((el) => {
            allPrice += el[key];
        })
        this.result = allPrice;
    }
    getAllPrice(){
        return this.result;
    }
}

class Drag {
    down(){
        //  ...
    }   
    move(){
        //  ...
        // 对拖拽没有做任何限制可以随意拖拽
    }   
    up(){
        //  ...
    }  
}
class LimitDrag extends Drag {
    move(){
        //  ...
        //  重写该方法对拖拽进行限制处理
    }
}

//  抽象枪类
class AbstractGun {
    shoot(){
        throw "Abstract methods cannot be called";
    }
}
//  步枪
class Rifle extends AbstractGun {
    shoot(){
        console.log("步枪射击...");
    }
}
//  狙击枪
class AUG extends Rifle {
    zoomOut(){
        console.log("通过放大镜观察");
    }
    shoot(){
        console.log("AUG射击...");
    }
}
//  士兵
class Soldier {
    constructor(){
        this.gun = null;
    }
    setGun(gun){
        this.gun = gun;
    }
    killEnemy(){
        if(!this.gun){
            throw "需要给我一把枪";
            return;
        }
        console.log("士兵开始射击...");
        this.gun.shoot();
    }
}
//  狙击手
class Snipper extends Soldier {
    killEnemy(aug){
        if(!this.gun){
            throw "需要给我一把枪";
            return;
        }
        this.gun.zoomOut();
        this.gun.shoot();
    }
}
let soldier = new Soldier();
soldier.setGun(new Rifle());
soldier.killEnemy();

let snipper = new Snipper();
//  分配狙击枪
snipper.setGun(new AUG());
snipper.killEnemy();

snipper.setGun(new Rifle());
// snipper.killEnemy();  //  this.gun.zoomOut is not a function

//  抽象枪类
class AbstractGun {
    shoot(){
        throw "Abstract methods cannot be called";
    }
}
//  步枪
class Rifle extends AbstractGun {
    shoot(){
        console.log("步枪射击...");
    }
}
//  狙击枪
class AUG extends AbstractGun {
    shoot(){
        console.log("AUG射击...");
    }
}

function mix(...mixins) {
  class Mix {}
  for (let mixin of mixins) {
    copyProperties(Mix, mixin);
    copyProperties(Mix.prototype, mixin.prototype);
  }
  return Mix;
}
function copyProperties(target, source) {
  for (let key of Reflect.ownKeys(source)) {
    if ( key !== "constructor"&& key !== "prototype"&& key !== "name") {
      let desc = Object.getOwnPropertyDescriptor(source, key);
      Object.defineProperty(target, key, desc);
    }
  }
}
class Behavior {
    eat(){
        throw "Abstract methods cannot be used";
    }   
    call(){
        throw "Abstract methods cannot be used";
    }
}
class Action {
    climbTree(){
        throw "Abstract methods cannot be used";
    }
}
class Dog extends Behavior{
    eat(food){
        console.log(`狗正在吃${food}`);
    }
    hungry(){
        console.log("汪汪汪,我饿了")
    }
}
const CatMin = mix(Behavior,Action);
class Cat extends CatMin{
    eat(food){
        console.log(`猫正在吃${food}`);
    }
    hungry(){
        console.log("喵喵喵,我饿了")
    }
    climbTree(){
        console.log("爬树很开心哦~")
    }
}
let dog = new Dog();
dog.eat("骨头");
dog.hungry();
let cat = new Cat();
cat.eat("鱼");
cat.hungry();
cat.climbTree();

class ISystem {
    close(){
        throw "Abstract methods cannot be used";
    }
}
class System extends ISystem{
    saveCurrentTask(){
        console.log("saveCurrentTask")
    }
    closeService(){
        console.log("closeService")
    }
    closeScreen(){
        console.log("closeScreen")
    }
    closePower(){
        console.log("closePower")
    }
    close(){
        this.saveCurrentTask();
        this.closeService();
        this.closeScreen();
        this.closePower();
    }
}
class IContainer{
    sendCloseCommand(){
        throw "Abstract methods cannot be used";
    }
}
class Container extends IContainer{
    constructor(){
        super()
        this.system = new System();
    }
    sendCloseCommand(){
        this.system.close();
    }
}
class Person extends IContainer{
    constructor(){
        super();
        this.container = new Container();
    }
    clickCloseButton(){
       this.container.sendCloseCommand();
    }
}
let person = new Person();
person.clickCloseButton();

function mix(...mixins) {
  class Mix {}
  for (let mixin of mixins) {
    copyProperties(Mix, mixin);
    copyProperties(Mix.prototype, mixin.prototype);
  }
  return Mix;
}
function copyProperties(target, source) {
  for (let key of Reflect.ownKeys(source)) {
    if ( key !== "constructor"&& key !== "prototype"&& key !== "name") {
      let desc = Object.getOwnPropertyDescriptor(source, key);
      Object.defineProperty(target, key, desc);
    }
  }
}
class Savings {
    saveMoney(){
        console.log("存钱");
    }
    withdrawMoney(){
        console.log("取钱");
    }
}
class Credit {
    overdraft(){
        console.log("透支")
    }
}
const CarMin = mix(Savings,Credit);
class UserCar extends CarMin {
    constructor(num,carUserName){
        super();
        console.log()
        this.carNum = num;
        this.carUserName = carUserName;
    }
    getCarNum(){
        return this.carNum;
    }
    getCarUserName(){
        return this.carUserName;
    }
}
let myCar = new UserCar(123456798,"Aaron");
console.log(myCar.getCarNum());
console.log(myCar.getCarUserName());
myCar.saveMoney();
myCar.withdrawMoney();
myCar.overdraft();