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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 { CanDeactivate } from '@angular/router';
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { TranslateService } from '@ngx-translate/core';
export interface ComponentCanDeactivate {
canDeactivate: () => boolean;
}
@Injectable()
export class PendingChangesGuard implements CanDeactivate<ComponentCanDeactivate> {
constructor(public translateService: TranslateService) {}
canDeactivate(component: ComponentCanDeactivate): boolean | Observable<boolean> {
// if there are no pending changes, just allow deactivation; else confirm first
return component.canDeactivate()
? true
: // NOTE: this warning message will only be shown when navigating elsewhere within your angular app;
// when navigating away from your angular app, the browser will show a generic warning message
// see http://stackoverflow.com/a/42207299/7307355
confirm(this.translateService.instant('serviceModels.warningMessage.warning'));
}
}
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