webapp-frontend/src/app/policy-control/policy-instance.datasource.ts

   1 /*-
   2  * ========================LICENSE_START=================================
   3  * O-RAN-SC
   4  * %%
   5  * Copyright (C) 2019 Nordix Foundation
   6  * %%
   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
  10  *
  11  *      http://www.apache.org/licenses/LICENSE-2.0
  12  *
  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===================================
  19  */
  20
  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';
  32
  33 export class PolicyInstanceDataSource extends DataSource<PolicyInstance> {
  34
  35     policyInstances: PolicyInstance[] = [];
  36
  37     private policyInstanceSubject = new BehaviorSubject<PolicyInstance[]>([]);
  38
  39     private loadingSubject = new BehaviorSubject<boolean>(false);
  40
  41     public loading$ = this.loadingSubject.asObservable();
  42
  43     public rowCount = 1; // hide footer during intial load
  44
  45     constructor(
  46         private policySvc: PolicyService,
  47         public sort: MatSort,
  48         private notificationService: NotificationService,
  49         private policyTypeSchema: PolicyTypeSchema) {
  50         super();
  51     }
  52
  53     public getPolicyInstances() {
  54         this.policyInstances = [] as PolicyInstance[];
  55         this.policySvc.getPolicyInstancesByType(this.policyTypeSchema.id).subscribe(policies => {
  56             if (policies.policy_ids.length != 0) {
  57                 policies.policy_ids.forEach(policyId => {
  58                     var policyInstance = {} as PolicyInstance
  59                     this.policySvc.getPolicyInstance(policyId).subscribe(policyInstance => {
  60                         this.policySvc.getPolicyStatus(policyId).subscribe(policyStatus => {
  61                             policyInstance.lastModified = policyStatus.last_modified;
  62                         })
  63                         this.policyInstances.push(policyInstance);
  64                     })
  65                     this.policyInstanceSubject.next(this.policyInstances);
  66                 })
  67             }
  68         })
  69     }
  70
  71     connect(): Observable<PolicyInstance[]> {
  72         const dataMutations = [
  73             this.policyInstanceSubject.asObservable(),
  74             this.sort.sortChange
  75         ];
  76         return merge(...dataMutations).pipe(map(() => {
  77             return this.getSortedData([...this.policyInstanceSubject.getValue()]);
  78         }));
  79     }
  80
  81     disconnect(): void {
  82         this.policyInstanceSubject.complete();
  83         this.loadingSubject.complete();
  84     }
  85
  86     private getSortedData(data: PolicyInstance[]) {
  87         if (!this.sort || !this.sort.active || this.sort.direction === '') {
  88             return data;
  89         }
  90
  91         return data.sort((a, b) => {
  92             const isAsc = this.sort.direction === 'asc';
  93             switch (this.sort.active) {
  94                 case 'instanceId': return compare(a.policy_id, b.policy_id, isAsc);
  95                 case 'ric': return compare(a.ric_id, b.ric_id, isAsc);
  96                 case 'service': return compare(a.service_id, b.service_id, isAsc);
  97                 case 'lastModified': return compare(a.lastModified, b.lastModified, isAsc);
  98                 default: return 0;
  99             }
 100         });
 101     }
 102 }
 103
 104 function compare(a: string, b: string, isAsc: boolean) {
 105     return (a < b ? -1 : 1) * (isAsc ? 1 : -1);
 106 }