2 * ========================LICENSE_START=================================
5 * Copyright (C) 2019 Nordix Foundation
7 * Licensed under the Apache License, Version 2.0 (the "License");
8 * you may not use this file except in compliance with the License.
9 * You may obtain a copy of the License at
11 * http://www.apache.org/licenses/LICENSE-2.0
13 * Unless required by applicable law or agreed to in writing, software
14 * distributed under the License is distributed on an "AS IS" BASIS,
15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
16 * See the License for the specific language governing permissions and
17 * limitations under the License.
18 * ========================LICENSE_END===================================
21 import { DataSource } from '@angular/cdk/collections';
22 import { HttpErrorResponse } from '@angular/common/http';
23 import { MatSort } from '@angular/material';
24 import { Observable } from 'rxjs/Observable';
25 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
26 import { merge } from 'rxjs';
27 import { of } from 'rxjs/observable/of';
28 import { catchError, finalize, map } from 'rxjs/operators';
29 import { PolicyInstance, PolicyTypeSchema } from '../interfaces/policy.types';
30 import { PolicyService } from '../services/policy/policy.service';
31 import { NotificationService } from '../services/ui/notification.service';
33 export class PolicyInstanceDataSource extends DataSource<PolicyInstance> {
35 private policyInstanceSubject = new BehaviorSubject<PolicyInstance[]>([]);
37 private loadingSubject = new BehaviorSubject<boolean>(false);
39 public loading$ = this.loadingSubject.asObservable();
41 public rowCount = 1; // hide footer during intial load
44 private policySvc: PolicyService,
46 private notificationService: NotificationService,
47 private policyTypeSchema: PolicyTypeSchema) {
52 this.loadingSubject.next(true);
53 this.policySvc.getPolicyInstances(this.policyTypeSchema.name)
55 catchError((her: HttpErrorResponse) => {
56 this.notificationService.error('Failed to get policy instances: ' + her.error);
59 finalize(() => this.loadingSubject.next(false))
61 .subscribe((instances: PolicyInstance[]) => {
62 this.rowCount = instances.length;
63 this.policyInstanceSubject.next(instances);
67 connect(): Observable<PolicyInstance[]> {
68 const dataMutations = [
69 this.policyInstanceSubject.asObservable(),
72 return merge(...dataMutations).pipe(map(() => {
73 return this.getSortedData([...this.policyInstanceSubject.getValue()]);
78 this.policyInstanceSubject.complete();
79 this.loadingSubject.complete();
82 private getSortedData(data: PolicyInstance[]) {
83 if (!this.sort || !this.sort.active || this.sort.direction === '') {
87 return data.sort((a, b) => {
88 const isAsc = this.sort.direction === 'asc';
89 switch (this.sort.active) {
90 case 'instanceId': return compare(a.id, b.id, isAsc);
91 case 'ric': return compare(a.ric, b.ric, isAsc);
92 case 'service': return compare(a.service, b.service, isAsc);
93 case 'lastModified': return compare(a.lastModified, b.lastModified, isAsc);
100 function compare(a: string, b: string, isAsc: boolean) {
101 return (a < b ? -1 : 1) * (isAsc ? 1 : -1);