/// 类装饰器示例

import 'reflect-metadata';

// 声明装饰器的成员
interface Decorator {
  title: string;
  age: number;
}

// 定义类装饰器
function decorator<T extends new (...args: any[]) => any>(target: T) {
  class NextTarget extends target {
    // 装饰构造函数
    constructor(...args) {
      super(...args);
      this.title = 'aaa';
      this.age = 11;
      console.info('Decorator.init');
    }

    // 重写方法
    getTitle() {
      console.info('Decorator.getTitle');
      return `#${super.getTitle()}`;
    }
  }

  interface NextTarget extends Decorator {
    name: string;
  }

  return NextTarget;
}

@decorator // 应用类装饰器
class Person {
  constructor() {
    console.info('Person.init');
  }

  getTitle() {
    console.info('Persion.getTitle');
    return this.title;
  }
}

// 添加类装饰器中的成员签名
interface Person extends Decorator {
  name: string;
}

const persion = new Person();

console.info(persion.title, persion.getTitle());

export default Person;