62769: Bitstream format registry

src/app/core/data/bitstream-format-data.service.ts

@@ -0,0 +1,183 @@
+import { Injectable } from '@angular/core';
+import { DataService } from './data.service';
+import { BitstreamFormat } from '../shared/bitstream-format.model';
+import { RequestService } from './request.service';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { NormalizedObjectBuildService } from '../cache/builders/normalized-object-build.service';
+import { createSelector, select, Store } from '@ngrx/store';
+import { CoreState } from '../core.reducers';
+import { ObjectCacheService } from '../cache/object-cache.service';
+import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { NotificationsService } from '../../shared/notifications/notifications.service';
+import { HttpClient } from '@angular/common/http';
+import { DefaultChangeAnalyzer } from './default-change-analyzer.service';
+import { DeleteByIDRequest, FindAllOptions, PostRequest, PutRequest } from './request.models';
+import { Observable } from 'rxjs';
+import { find, map, tap } from 'rxjs/operators';
+import { configureRequest, getResponseFromEntry } from '../shared/operators';
+import { distinctUntilChanged } from 'rxjs/internal/operators/distinctUntilChanged';
+import { RestResponse } from '../cache/response.models';
+import { AppState } from '../../app.reducer';
+import { BitstreamFormatRegistryState } from '../../+admin/admin-registries/bitstream-formats/bitstream-format.reducers';
+import {
+  BitstreamFormatsRegistryDeselectAction,
+  BitstreamFormatsRegistryDeselectAllAction,
+  BitstreamFormatsRegistrySelectAction
+} from '../../+admin/admin-registries/bitstream-formats/bitstream-format.actions';
+import { hasValue } from '../../shared/empty.util';
+import { RequestEntry } from './request.reducer';
+
+const bitstreamFormatsStateSelector = (state: AppState) => state.bitstreamFormats;
+const selectedBitstreamFormatSelector = createSelector(bitstreamFormatsStateSelector,
+  (bitstreamFormatRegistryState: BitstreamFormatRegistryState) => bitstreamFormatRegistryState.selectedBitstreamFormats);
+
+/**
+ * A service responsible for fetching/sending data from/to the REST API on the bitstreamformats endpoint
+ */
+@Injectable()
+export class BitstreamFormatDataService extends DataService<BitstreamFormat> {
+
+  protected linkPath = 'bitstreamformats';
+  protected forceBypassCache = false;
+
+  constructor(
+    protected requestService: RequestService,
+    protected rdbService: RemoteDataBuildService,
+    protected dataBuildService: NormalizedObjectBuildService,
+    protected store: Store<CoreState>,
+    protected objectCache: ObjectCacheService,
+    protected halService: HALEndpointService,
+    protected notificationsService: NotificationsService,
+    protected http: HttpClient,
+    protected comparator: DefaultChangeAnalyzer<BitstreamFormat>) {
+    super();
+  }
+
+  /**
+   * Get the endpoint for browsing bitstream formats
+   * @param {FindAllOptions} options
+   * @returns {Observable<string>}
+   */
+  getBrowseEndpoint(options: FindAllOptions = {}, linkPath?: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath);
+  }
+
+  /**
+   * Get the endpoint to update an existing bitstream format
+   * @param formatId
+   */
+  public getUpdateEndpoint(formatId: string): Observable<string> {
+    return this.getBrowseEndpoint().pipe(
+      map((endpoint: string) => this.getIDHref(endpoint, formatId))
+    );
+  }
+
+  /**
+   * Get the endpoint to create a new bitstream format
+   */
+  public getCreateEndpoint(): Observable<string> {
+    return this.getBrowseEndpoint();
+  }
+
+  /**
+   * Update an existing bitstreamFormat
+   * @param bitstreamFormat
+   */
+  updateBitstreamFormat(bitstreamFormat: BitstreamFormat): Observable<RestResponse> {
+    const requestId = this.requestService.generateRequestId();
+
+    this.getUpdateEndpoint(bitstreamFormat.id).pipe(
+      distinctUntilChanged(),
+      map((endpointURL: string) =>
+        new PutRequest(requestId, endpointURL, bitstreamFormat)),
+      configureRequest(this.requestService)).subscribe();
+
+    return this.requestService.getByUUID(requestId).pipe(
+      getResponseFromEntry()
+    );
+
+  }
+
+  /**
+   * Create a new BitstreamFormat
+   * @param BitstreamFormat
+   */
+  public createBitstreamFormat(bitstreamFormat: BitstreamFormat): Observable<RestResponse> {
+    const requestId = this.requestService.generateRequestId();
+
+    this.getCreateEndpoint().pipe(
+      map((endpointURL: string) => {
+        return new PostRequest(requestId, endpointURL, bitstreamFormat);
+      }),
+      configureRequest(this.requestService)
+    ).subscribe();
+
+    return this.requestService.getByUUID(requestId).pipe(
+      getResponseFromEntry()
+    );
+  }
+
+  /**
+   * Clears the cache of the list of BitstreamFormats
+   */
+  public clearBitStreamFormatRequests(): Observable<string> {
+    return this.getBrowseEndpoint().pipe(
+      tap((href: string) => this.requestService.removeByHrefSubstring(href))
+    );
+  }
+
+  /**
+   * Gets all the selected BitstreamFormats from the store
+   */
+  public getSelectedBitstreamFormats(): Observable<BitstreamFormat[]> {
+    return this.store.pipe(select(selectedBitstreamFormatSelector));
+  }
+
+  /**
+   * Adds a BistreamFormat to the selected BitstreamFormats in the store
+   * @param bitstreamFormat
+   */
+  public selectBitstreamFormat(bitstreamFormat: BitstreamFormat) {
+    this.store.dispatch(new BitstreamFormatsRegistrySelectAction(bitstreamFormat));
+  }
+
+  /**
+   * Removes a BistreamFormat from the list of selected BitstreamFormats in the store
+   * @param bitstreamFormat
+   */
+  public deselectBitstreamFormat(bitstreamFormat: BitstreamFormat) {
+    this.store.dispatch(new BitstreamFormatsRegistryDeselectAction(bitstreamFormat));
+  }
+
+  /**
+   * Removes all BitstreamFormats from the list of selected BitstreamFormats in the store
+   */
+  public deselectAllBitstreamFormats() {
+    this.store.dispatch(new BitstreamFormatsRegistryDeselectAllAction());
+  }
+
+  /**
+   * Delete an existing DSpace Object on the server
+   * @param format The DSpace Object to be removed
+   * Return an observable that emits true when the deletion was successful, false when it failed
+   */
+  delete(format: BitstreamFormat): Observable<boolean> {
+    const requestId = this.requestService.generateRequestId();
+
+    const hrefObs = this.halService.getEndpoint(this.linkPath).pipe(
+      map((endpoint: string) => this.getIDHref(endpoint, format.id)));
+
+    hrefObs.pipe(
+      find((href: string) => hasValue(href)),
+      map((href: string) => {
+        const request = new DeleteByIDRequest(requestId, href, format.id);
+        this.requestService.configure(request);
+      })
+    ).subscribe();
+
+    return this.requestService.getByUUID(requestId).pipe(
+      find((request: RequestEntry) => request.completed),
+      map((request: RequestEntry) => request.response.isSuccessful)
+    );
+  }
+}