83635: Request a copy - Request page

src/app/core/data/item-request-data.service.ts

@@ -0,0 +1,59 @@
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs';
+import { filter, find, map } from 'rxjs/operators';
+import { RemoteDataBuildService } from '../cache/builders/remote-data-build.service';
+import { HALEndpointService } from '../shared/hal-endpoint.service';
+import { getFirstCompletedRemoteData } from '../shared/operators';
+import { RemoteData } from './remote-data';
+import { PostRequest } from './request.models';
+import { RequestService } from './request.service';
+import { ItemRequest } from '../shared/item-request.model';
+import { hasValue, isNotEmpty } from '../../shared/empty.util';
+
+/**
+ * A service responsible for fetching/sending data from/to the REST API on the bitstreamformats endpoint
+ */
+@Injectable(
+  {
+    providedIn: 'root',
+  }
+)
+export class ItemRequestDataService {
+
+  protected linkPath = 'itemrequests';
+
+  constructor(
+    protected requestService: RequestService,
+    protected rdbService: RemoteDataBuildService,
+    protected halService: HALEndpointService) {
+  }
+
+  getItemRequestEndpoint(): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath);
+  }
+
+  getFindItemRequestEndpoint(requestID: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath).pipe(
+      filter((href: string) => isNotEmpty(href)),
+      map((href: string) => `${href}/${requestID}`));
+  }
+
+  requestACopy(itemRequest: ItemRequest): Observable<RemoteData<ItemRequest>> {
+    const requestId = this.requestService.generateRequestId();
+
+    const href$ = this.getItemRequestEndpoint();
+
+    href$.pipe(
+      find((href: string) => hasValue(href)),
+      map((href: string) => {
+        const request = new PostRequest(requestId, href, itemRequest);
+        this.requestService.send(request);
+      })
+    ).subscribe();
+
+    return this.rdbService.buildFromRequestUUID<ItemRequest>(requestId).pipe(
+      getFirstCompletedRemoteData()
+    );
+  }
+
+}