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import { Injectable, SecurityContext } from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';
import { Observable } from 'rxjs/Observable';
import { Subject } from 'rxjs/Subject';
export type AlertType = "danger" | "warning" | "info" | "success";
export interface IAlert {
type: AlertType;
msg: string;
show?: boolean;
dismissible?: boolean;
dismissTimeout?: number; // close alert after this time (in seconds)
id?: number;
}
@Injectable()
export class AlertService {
public alerts: Observable<IAlert[]>;
private _alerts: IAlert[];
private alertsSubject = <Subject<IAlert[]>>new Subject();
private uid = 0;
private defaultDissmissTmo = 5; // in seconds
constructor(private sanitizer: DomSanitizer) {
this.alerts = this.alertsSubject.asObservable();
this._alerts = [];
this.uid = 0;
}
public error(msg: string) {
this.add({ type: "danger", msg: msg, dismissible: true });
}
public warning(msg: string, dismissible?: boolean) {
this.add({ type: "warning", msg: msg, dismissible: true, dismissTimeout: (dismissible ? this.defaultDissmissTmo : 0) });
}
public info(msg: string) {
this.add({ type: "info", msg: msg, dismissible: true, dismissTimeout: this.defaultDissmissTmo });
}
public add(al: IAlert) {
this._alerts.push({
show: true,
type: al.type,
msg: this.sanitizer.sanitize(SecurityContext.HTML, al.msg),
dismissible: al.dismissible || true,
dismissTimeout: (al.dismissTimeout * 1000) || 0,
id: this.uid,
});
this.uid += 1;
this.alertsSubject.next(this._alerts);
}
public del(al: IAlert) {
let idx = this._alerts.findIndex((a) => a.id === al.id);
if (idx > -1) {
this._alerts.splice(idx, 1);
}
}
}
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