All files / src/services/zd-alert alert-stack.ts

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import { Alert, IAlert } from '../../components';
import { IAlertsManager } from './interfaces';
 
export class AlertStack implements IAlertsManager {
	protected queue: IAlert[] = [];
 
	public visibleInstances: Alert[] = [];
 
	public show(alert: IAlert): number {
		this.queue.push(alert);
 
		return this.display(alert);
	}
 
	private display(alert: IAlert) {
		const lastAlert = this.visibleInstances.slice(-1)[0];
		const lastId = lastAlert?.id || 0;
		const id = lastId + 1;
		const instance = new Alert({ ...alert, id });
		this.visibleInstances.push(instance);
		instance.show();
		return id;
	}
 
	remove(index: number): void {
		this.queue.splice(index, 1);
		this.visibleInstances.splice(index, 1);
	}
}