dspace-angular/src/app/+item-page/edit-item-page/item-bitstreams/item-edit-bitstream-bundle/item-edit-bitstream-bundle.component.ts

import { Component, EventEmitter, Input, OnInit, Output, ViewChild, ViewContainerRef } from '@angular/core';
import { Bundle } from '../../../../core/shared/bundle.model';
import { ObjectUpdatesService } from '../../../../core/data/object-updates/object-updates.service';
import { Observable } from 'rxjs/internal/Observable';
import { FieldUpdates } from '../../../../core/data/object-updates/object-updates.reducer';
import { toBitstreamsArray } from '../../../../core/shared/item-bitstreams-utils';
import { switchMap } from 'rxjs/operators';
import { Bitstream } from '../../../../core/shared/bitstream.model';

@Component({
  selector: 'ds-item-edit-bitstream-bundle',
  templateUrl: './item-edit-bitstream-bundle.component.html',
})
/**
 * Component that displays a single bundle of an item on the item bitstreams edit page
 */
export class ItemEditBitstreamBundleComponent implements OnInit {

  /**
   * The view on the bundle information and bitstreams
   */
  @ViewChild('bundleView') bundleView;

  /**
   * The bundle to display bitstreams for
   */
  @Input() bundle: Bundle;

  /**
   * The updates to the current bundle
   */
  updates$: Observable<FieldUpdates>;

  constructor(private objectUpdatesService: ObjectUpdatesService,
              private viewContainerRef: ViewContainerRef) {
  }

  ngOnInit(): void {
    this.objectUpdatesService.initialize(this.bundle.self, [], new Date());
    this.updates$ = this.bundle.bitstreams.pipe(
      toBitstreamsArray(),
      switchMap((bitstreams: Bitstream[]) => this.objectUpdatesService.getFieldUpdatesExclusive(this.bundle.self, bitstreams))
    );

    this.viewContainerRef.createEmbeddedView(this.bundleView);
  }
}