typescript 이벤트 알림 메커니즘

/**
 *   
 */
export class Emitter {
    /**      */
    private static listeners = {};

    /** 
     *     
     * @param name     
     * @param callback     
     * @param context    
     */
    public static register(name: string, callback: Function, context: any) {
        let observers: Observer[] = Emitter.listeners[name];
        if (!observers) {
            Emitter.listeners[name] = [];
        }
        Emitter.listeners[name].push(new Observer(callback, context));
    }

    /**
     *     
     * @param name     
     * @param callback     
     * @param context    
     */
    public static remove(name: string, callback: Function, context: any) {
        let observers: Observer[] = Emitter.listeners[name];
        if (!observers) return;
        let length = observers.length;
        for (let i = 0; i < length; i++) {
            let observer = observers[i];
            if (observer.compar(context)) {
                observers.splice(i, 1);
                break;
            }
        }
        if (observers.length == 0) {
            delete Emitter.listeners[name];
        }
    }

    /**
     *     
     * @param name     
     */
    public static fire(name: string, ...args: any[]) {
        let observers: Observer[] = Emitter.listeners[name];
        if (!observers) return;
        let length = observers.length;
        for (let i = 0; i < length; i++) {
            let observer = observers[i];
            observer.notify(name, ...args);
        }
    }
}

/**
 *    
 */
class Observer {
    /**      */
    private callback: Function = null;
    /**     */
    private context: any = null;

    constructor(callback: Function, context: any) {
        let self = this;
        self.callback = callback;
        self.context = context;
    }

    /**
     *     
     * @param args     
     */
    notify(...args: any[]): void {
        let self = this;
        self.callback.call(self.context, ...args);
    }

    /**
     *      
     * @param context    
     */
    compar(context: any): boolean {
        return context == this.context;
    }
}

import {Emitter} from "./emitter";
class Test{
    constructor(){
        let self = this;
        Emitter.register("nihao", self.test, self);
    }

    public test(eventName:string, args1:string, args2:number){
        console.log(eventName, args1, args2);
        console.log(arguments);
    }
}

let a = new Test();
Emitter.fire("nihao", "cyrwpj", 1);