1 files changed, 66 insertions, 0 deletions
diff --git a/src/app/modules/alerting/alert.service.ts b/src/app/modules/alerting/alert.service.ts
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+++ b/src/app/modules/alerting/alert.service.ts
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+/*
+ * Copyright (c) 2022. Deutsche Telekom AG
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+
+import { Injectable } from '@angular/core';
+import { Observable, Subject } from 'rxjs';
+import { filter } from 'rxjs/operators';
+
+import { Alert, AlertType } from './alert.model';
+
+@Injectable({ providedIn: 'root' })
+export class AlertService {
+  private subject = new Subject<Alert>();
+  private defaultId = 'default-alert';
+
+  // enable subscribing to alerts observable
+  onAlert(id = this.defaultId): Observable<Alert> {
+    return this.subject.asObservable().pipe(filter(x => x && x.id === id));
+  }
+  get alerts() {
+    return this.subject;
+  }
+
+  // convenience methods
+  success(message: string, options?: Partial<Alert>) {
+    this.alert(new Alert({ ...options, type: AlertType.Success, message }));
+  }
+
+  error(message: string, options?: Partial<Alert>) {
+    this.alert(new Alert({ ...options, type: AlertType.Error, message }));
+  }
+
+  info(message: string, options?: Partial<Alert>) {
+    this.alert(new Alert({ ...options, type: AlertType.Info, message }));
+  }
+
+  warn(message: string, options?: Partial<Alert>) {
+    this.alert(new Alert({ ...options, type: AlertType.Warning, message }));
+  }
+
+  // main alert method
+  alert(alert: Alert) {
+    alert.id = alert.id || this.defaultId;
+    this.subject.next(alert);
+  }
+
+  // clear alerts
+  clear(id = this.defaultId) {
+    this.subject.next(new Alert({ id }));
+  }
+}