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 } from '../interfaces/policy.types';
30 import { PolicyService } from '../services/policy/policy.service';
31 import { NotificationService } from '../services/ui/notification.service';
32 import { PolicyType } from '../interfaces/policy.types';
34 export class PolicyInstanceDataSource extends DataSource<PolicyInstance> {
36 private policyInstanceSubject = new BehaviorSubject<PolicyInstance[]>([]);
38 private loadingSubject = new BehaviorSubject<boolean>(false);
40 public loading$ = this.loadingSubject.asObservable();
42 public rowCount = 1; // hide footer during intial load
45 private policySvc: PolicyService,
47 private notificationService: NotificationService,
48 private policyType: PolicyType) {
53 this.loadingSubject.next(true);
54 this.policySvc.getPolicyInstances(this.policyType.name)
56 catchError((her: HttpErrorResponse) => {
57 this.notificationService.error('Failed to get policy instances: ' + her.message);
60 finalize(() => this.loadingSubject.next(false))
62 .subscribe((instances: PolicyInstance[]) => {
63 this.rowCount = instances.length;
64 this.policyInstanceSubject.next(instances);
68 connect(): Observable<PolicyInstance[]> {
69 const dataMutations = [
70 this.policyInstanceSubject.asObservable(),
73 return merge(...dataMutations).pipe(map(() => {
74 return this.getSortedData([...this.policyInstanceSubject.getValue()]);
79 this.policyInstanceSubject.complete();
80 this.loadingSubject.complete();
83 private getSortedData(data: PolicyInstance[]) {
84 if (!this.sort || !this.sort.active || this.sort.direction === '') {
88 return data.sort((a, b) => {
89 const isAsc = this.sort.direction === 'asc';
90 switch (this.sort.active) {
91 case 'instanceId': return compare(a.id, b.id, isAsc);
92 case 'ric': return compare(a.ric, b.ric, isAsc);
93 case 'service': return compare(a.service, b.service, isAsc);
94 case 'lastModified': return compare(a.lastModified, b.lastModified, isAsc)
101 function compare(a: string, b: string, isAsc: boolean) {
102 return (a < b ? -1 : 1) * (isAsc ? 1 : -1);