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declare const window: Window;
export class BasePubSub {
subscribers: Map<string, ISubscriber>;
eventsCallbacks: Array<Function>;
clientId: string;
constructor(pluginId: string) {
this.subscribers = new Map<string, ISubscriber>();
this.eventsCallbacks = new Array<Function>();
this.clientId = pluginId;
this.onMessage = this.onMessage.bind(this);
window.addEventListener("message", this.onMessage);
}
public register(subscriberId: string, subscriberWindow: Window, subscriberUrl: string) {
const subscriber = {
window: subscriberWindow,
locationUrl: subscriberUrl || subscriberWindow.location.href
} as ISubscriber;
this.subscribers.set(subscriberId, subscriber);
}
public unregister(subscriberId: string) {
this.subscribers.delete(subscriberId);
}
public on(callback: Function) {
this.eventsCallbacks.push(callback);
}
public off(callback: Function) {
let index = this.eventsCallbacks.indexOf(callback);
this.eventsCallbacks.splice(index, 1)
}
public notify(eventType:string, eventData?:any) {
let eventObj = {
type: eventType,
data: eventData,
originId: this.clientId
} as IPubSubEvent;
this.subscribers.forEach( (subscriber: ISubscriber, id: string) => {
subscriber.window.postMessage(eventObj, subscriber.locationUrl)
});
}
protected onMessage(event: any) {
if (this.subscribers.has(event.data.originId)) {
this.eventsCallbacks.forEach((callback: Function) => {
callback(event.data, event);
})
}
}
}
export class PluginPubSub extends BasePubSub {
constructor(pluginId: string, parentUrl: string) {
super(pluginId);
this.register('sdc-hub', window.parent, parentUrl);
this.subscribe();
}
public subscribe() {
const registerData = {
pluginId: this.clientId
};
this.notify('PLUGIN_REGISTER', registerData);
}
public unsubscribe() {
const unregisterData = {
pluginId: this.clientId
};
this.notify('PLUGIN_UNREGISTER', unregisterData);
}
}
export interface IPubSubEvent {
type: string;
originId: string;
data: any;
}
export interface ISubscriber {
window: Window;
locationUrl: string;
}
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