webapp-frontend/src/app/policy/policy-instance/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 { MatSort } from '@angular/material/sort';
  23 import { Observable } from 'rxjs/Observable';
  24 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
  25 import { merge } from 'rxjs';
  26 import { map } from 'rxjs/operators';
  27 import { PolicyInstance } from '@interfaces/policy.types';
  28 import { PolicyService } from '@services/policy/policy.service';
  29 import { NotificationService } from '@services/ui/notification.service';
  30
  31 export class PolicyInstanceDataSource extends DataSource<PolicyInstance> {
  32
  33     policyInstances: PolicyInstance[] = [];
  34
  35     private policyInstanceSubject = new BehaviorSubject<PolicyInstance[]>([]);
  36
  37     private loadingSubject = new BehaviorSubject<boolean>(false);
  38
  39     public loading$ = this.loadingSubject.asObservable();
  40
  41     public rowCount = 1; // hide footer during intial load
  42
  43     constructor(
  44         private policySvc: PolicyService,
  45         public sort: MatSort,
  46         private notificationService: NotificationService,
  47         private policyTypeSchemaId: string) {
  48         super();
  49     }
  50
  51     public getPolicyInstances() {
  52         this.policyInstances = [] as PolicyInstance[];
  53         this.policySvc.getPolicyInstancesByType(this.policyTypeSchemaId).subscribe(policies => {
  54             if (policies.policy_ids.length != 0) {
  55                 policies.policy_ids.forEach(policyId => {
  56                     this.policySvc.getPolicyInstance(policyId).subscribe(policyInstance => {
  57                         this.policySvc.getPolicyStatus(policyId).subscribe(policyStatus => {
  58                             policyInstance.lastModified = policyStatus.last_modified;
  59                         })
  60                         this.policyInstances.push(policyInstance);
  61                     })
  62                     this.policyInstanceSubject.next(this.policyInstances);
  63                 })
  64             }
  65         })
  66     }
  67
  68     connect(): Observable<PolicyInstance[]> {
  69         const dataMutations = [
  70             this.policyInstanceSubject.asObservable(),
  71             this.sort.sortChange
  72         ];
  73         return merge(...dataMutations).pipe(map(() => {
  74             return this.getSortedData([...this.policyInstanceSubject.getValue()]);
  75         }));
  76     }
  77
  78     disconnect(): void {
  79         this.policyInstanceSubject.complete();
  80         this.loadingSubject.complete();
  81     }
  82
  83     private getSortedData(data: PolicyInstance[]) {
  84         if (!this.sort || !this.sort.active || this.sort.direction === '') {
  85             return data;
  86         }
  87
  88         return data.sort((a, b) => {
  89             const isAsc = this.sort.direction === 'asc';
  90             switch (this.sort.active) {
  91                 case 'instanceId': return compare(a.policy_id, b.policy_id, isAsc);
  92                 case 'ric': return compare(a.ric_id, b.ric_id, isAsc);
  93                 case 'service': return compare(a.service_id, b.service_id, isAsc);
  94                 case 'lastModified': return compare(a.lastModified, b.lastModified, isAsc);
  95                 default: return 0;
  96             }
  97         });
  98     }
  99 }
 100
 101 function compare(a: string, b: string, isAsc: boolean) {
 102     return (a < b ? -1 : 1) * (isAsc ? 1 : -1);
 103 }