webapp-frontend/src/app/ei-coordinator/ei-producer.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 { HttpErrorResponse } from '@angular/common/http';
  22 import { Injectable } from '@angular/core';
  23 import { MatTableDataSource } from '@angular/material';
  24
  25 import { Observable } from 'rxjs/Observable';
  26 import { BehaviorSubject } from 'rxjs/BehaviorSubject';
  27 import { of } from 'rxjs/observable/of';
  28 import { catchError, finalize, tap } from 'rxjs/operators';
  29
  30 import { EIProducer } from '../interfaces/ei.types';
  31 import { EIService } from '../services/ei/ei.service';
  32 import { NotificationService } from '../services/ui/notification.service';
  33
  34 @Injectable({
  35     providedIn: 'root'
  36 })
  37
  38 export class EIProducerDataSource extends MatTableDataSource<EIProducer> {
  39
  40     private producerSubject = new BehaviorSubject<EIProducer[]>([]);
  41
  42     private loadingSubject = new BehaviorSubject<boolean>(false);
  43
  44     public loading$ = this.loadingSubject.asObservable();
  45
  46     public rowCount = 1; // hide footer during intial load
  47
  48     constructor(
  49         private eiSvc: EIService,
  50         private notificationService: NotificationService) {
  51         super();
  52     }
  53
  54     loadTable() {
  55         this.loadingSubject.next(true);
  56         this.eiSvc.getEIProducers()
  57             .pipe(
  58                 catchError((her: HttpErrorResponse) => {
  59                     this.notificationService.error('Failed to get producers: ' + her.error);
  60                     return of([]);
  61                 }),
  62                 finalize(() => this.loadingSubject.next(false))
  63             )
  64             .subscribe((prods: EIProducer[]) => {
  65                 console.log("Producers: " + prods);
  66                 this.rowCount = prods.length;
  67                 this.producerSubject.next(prods);
  68             });
  69             this.connect();
  70     }
  71
  72     connect(): BehaviorSubject<EIProducer[]> {
  73         return this.producerSubject;
  74     }
  75
  76     disconnect(): void {
  77         this.producerSubject.complete();
  78         this.loadingSubject.complete();
  79     }
  80
  81     getProducers(): Observable<EIProducer[]> {
  82         return this.eiSvc.getEIProducers()
  83         .pipe(tap(console.log));
  84     }
  85 }