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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 }));
}
}
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