breadcrumb.component.ts
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///
/// Copyright © 2016-2020 The Thingsboard Authors
///
/// 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.
///
import { Component, Input, OnDestroy, OnInit } from '@angular/core';
import { BehaviorSubject, Subject } from 'rxjs';
import { BreadCrumb, BreadCrumbConfig } from './breadcrumb';
import { ActivatedRoute, ActivatedRouteSnapshot, NavigationEnd, Router } from '@angular/router';
import { distinctUntilChanged, filter, map } from 'rxjs/operators';
import { TranslateService } from '@ngx-translate/core';
@Component({
selector: 'tb-breadcrumb',
templateUrl: './breadcrumb.component.html',
styleUrls: ['./breadcrumb.component.scss']
})
export class BreadcrumbComponent implements OnInit, OnDestroy {
activeComponentValue: any;
@Input()
set activeComponent(activeComponent: any) {
this.activeComponentValue = activeComponent;
}
breadcrumbs$: Subject<Array<BreadCrumb>> = new BehaviorSubject<Array<BreadCrumb>>(this.buildBreadCrumbs(this.activatedRoute.snapshot));
routerEventsSubscription = this.router.events.pipe(
filter((event) => event instanceof NavigationEnd ),
distinctUntilChanged(),
map( () => this.buildBreadCrumbs(this.activatedRoute.snapshot) )
).subscribe(breadcrumns => this.breadcrumbs$.next(breadcrumns) );
lastBreadcrumb$ = this.breadcrumbs$.pipe(
map( breadcrumbs => breadcrumbs[breadcrumbs.length - 1])
);
constructor(private router: Router,
private activatedRoute: ActivatedRoute,
private translate: TranslateService) {
}
ngOnInit(): void {
}
ngOnDestroy(): void {
if (this.routerEventsSubscription) {
this.routerEventsSubscription.unsubscribe();
}
}
private lastChild(route: ActivatedRouteSnapshot) {
let child = route;
while (child.firstChild !== null) {
child = child.firstChild;
}
return child;
}
buildBreadCrumbs(route: ActivatedRouteSnapshot, breadcrumbs: Array<BreadCrumb> = [],
lastChild?: ActivatedRouteSnapshot): Array<BreadCrumb> {
if (!lastChild) {
lastChild = this.lastChild(route);
}
let newBreadcrumbs = breadcrumbs;
if (route.routeConfig && route.routeConfig.data) {
const breadcrumbConfig = route.routeConfig.data.breadcrumb as BreadCrumbConfig<any>;
if (breadcrumbConfig && !breadcrumbConfig.skip) {
let label;
let labelFunction;
let ignoreTranslate;
if (breadcrumbConfig.labelFunction) {
labelFunction = () => {
return breadcrumbConfig.labelFunction(route, this.translate, this.activeComponentValue, lastChild.data);
};
ignoreTranslate = true;
} else {
label = breadcrumbConfig.label || 'home.home';
ignoreTranslate = false;
}
const icon = breadcrumbConfig.icon || 'home';
const isMdiIcon = icon.startsWith('mdi:');
const link = [ route.pathFromRoot.map(v => v.url.map(segment => segment.toString()).join('/')).join('/') ];
const breadcrumb = {
label,
labelFunction,
ignoreTranslate,
icon,
isMdiIcon,
link,
queryParams: null
};
newBreadcrumbs = [...breadcrumbs, breadcrumb];
}
}
if (route.firstChild) {
return this.buildBreadCrumbs(route.firstChild, newBreadcrumbs, lastChild);
}
return newBreadcrumbs;
}
}