1 files changed, 67 insertions, 0 deletions
diff --git a/webapp/src/app/services/alert.service.ts b/webapp/src/app/services/alert.service.ts
new file mode 100644
index 0000000..2978e84
--- /dev/null
+++ b/webapp/src/app/services/alert.service.ts
@@ -0,0 +1,67 @@
+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, dismissTime?: number) {
+        this.add({
+            type: "danger", msg: msg, dismissible: true, dismissTimeout: dismissTime
+        });
+    }
+
+    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) {
+        let msg = String(al.msg).replace("\n", "<br>");
+        this._alerts.push({
+            show: true,
+            type: al.type,
+            msg: this.sanitizer.sanitize(SecurityContext.HTML, 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);
+        }
+    }
+}