module Routier {
export enum EventType {
ContactCreated,
RouteCalculated,
RouteSaved
}
export interface IObserver {
notify(eventName: EventType, data: Object);
subscribe(eventName: EventType, callback: (object) => void);
}
export class EventBus implements IObserver {
private subscribers;
private static _instance: EventBus = null;
constructor() {
this.subscribers = [];
}
public static getInstance():EventBus{
if (EventBus._instance === null) {
EventBus._instance = new EventBus();
}
return EventBus._instance;
}
public subscribe(eventName, callback) {
if (this.subscribers[eventName] === undefined) {
this.subscribers[eventName] = [];
}
this.subscribers[eventName].push(callback);
}
public notify(eventName, parameters) {
for (var i = 0; i < this.subscribers[eventName].length; i++) {
this.subscribers[eventName][i](parameters);
}
}
}
}
Anonymous - 3 years ago