121787: Get rid of multiple unnecessary requests on browse by pages

(cherry picked from commit a105bcd)

src/app/browse-by/browse-by-date-page/browse-by-date-page.component.ts

@@ -11,7 +11,7 @@ import { BrowseService } from '../../core/browse/browse.service';
 import { DSpaceObjectDataService } from '../../core/data/dspace-object-data.service';
 import { StartsWithType } from '../../shared/starts-with/starts-with-decorator';
 import { PaginationService } from '../../core/pagination/pagination.service';
-import { map } from 'rxjs/operators';
+import { map, take } from 'rxjs/operators';
 import { PaginationComponentOptions } from '../../shared/pagination/pagination-component-options.model';
 import { SortDirection, SortOptions } from '../../core/cache/models/sort-options.model';
 import { isValidDate } from '../../shared/date.util';
@@ -52,15 +52,16 @@ export class BrowseByDatePageComponent extends BrowseByMetadataPageComponent {
   ngOnInit(): void {
     const sortConfig = new SortOptions('default', SortDirection.ASC);
     this.startsWithType = StartsWithType.date;
-    // include the thumbnail configuration in browse search options
-    this.updatePage(getBrowseSearchOptions(this.defaultBrowseId, this.paginationConfig, sortConfig, this.fetchThumbnails));
     this.currentPagination$ = this.paginationService.getCurrentPagination(this.paginationConfig.id, this.paginationConfig);
     this.currentSort$ = this.paginationService.getCurrentSort(this.paginationConfig.id, sortConfig);
     this.subs.push(
-      observableCombineLatest([this.route.params, this.route.queryParams, this.route.data,
-        this.currentPagination$, this.currentSort$]).pipe(
-        map(([routeParams, queryParams, data, currentPage, currentSort]) => {
-          return [Object.assign({}, routeParams, queryParams, data), currentPage, currentSort];
+      observableCombineLatest(
+        [ this.route.params.pipe(take(1)),
+          this.route.queryParams,
+          this.currentPagination$,
+          this.currentSort$]).pipe(
+        map(([routeParams, queryParams, currentPage, currentSort]) => {
+          return [Object.assign({}, routeParams, queryParams), currentPage, currentSort];
         })
       ).subscribe(([params, currentPage, currentSort]: [Params, PaginationComponentOptions, SortOptions]) => {
         const metadataKeys = params.browseDefinition ? params.browseDefinition.metadataKeys : this.defaultMetadataKeys;

src/app/browse-by/browse-by-metadata-page/browse-by-metadata-page.component.ts

@@ -15,7 +15,7 @@ import { DSpaceObjectDataService } from '../../core/data/dspace-object-data.serv
 import { DSpaceObject } from '../../core/shared/dspace-object.model';
 import { StartsWithType } from '../../shared/starts-with/starts-with-decorator';
 import { PaginationService } from '../../core/pagination/pagination.service';
-import { filter, map, mergeMap } from 'rxjs/operators';
+import { filter, map, mergeMap, take } from 'rxjs/operators';
 import { followLink, FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
 import { Bitstream } from '../../core/shared/bitstream.model';
 import { Collection } from '../../core/shared/collection.model';
@@ -152,7 +152,11 @@ export class BrowseByMetadataPageComponent implements OnInit, OnDestroy {
     this.currentPagination$ = this.paginationService.getCurrentPagination(this.paginationConfig.id, this.paginationConfig);
     this.currentSort$ = this.paginationService.getCurrentSort(this.paginationConfig.id, sortConfig);
     this.subs.push(
-      observableCombineLatest([this.route.params, this.route.queryParams, this.currentPagination$, this.currentSort$]).pipe(
+      observableCombineLatest(
+        [ this.route.params.pipe(take(1)),
+          this.route.queryParams,
+          this.currentPagination$,
+          this.currentSort$]).pipe(
         map(([routeParams, queryParams, currentPage, currentSort]) => {
           return [Object.assign({}, routeParams, queryParams),currentPage,currentSort];
         })

src/app/menu.resolver.spec.ts

@@ -16,9 +16,12 @@ import { MenuServiceStub } from './shared/testing/menu-service.stub';
 import { MenuID } from './shared/menu/menu-id.model';
 import { BrowseService } from './core/browse/browse.service';
 import { cold } from 'jasmine-marbles';
-import createSpy = jasmine.createSpy;
 import { createSuccessfulRemoteDataObject$ } from './shared/remote-data.utils';
 import { createPaginatedList } from './shared/testing/utils.test';
+import createSpy = jasmine.createSpy;
+import { AuthService } from './core/auth/auth.service';
+import { MenuResolverService } from './menu-resolver.service';
+import { AuthServiceStub } from './shared/testing/auth-service.stub';
 
 const BOOLEAN = { t: true, f: false };
 const MENU_STATE = {
@@ -61,6 +64,7 @@ describe('MenuResolver', () => {
         { provide: BrowseService, useValue: browseService },
         { provide: AuthorizationDataService, useValue: authorizationService },
         { provide: ScriptDataService, useValue: scriptService },
+        { provide: AuthService, useValue: AuthServiceStub },
         {
           provide: NgbModal, useValue: {
             open: () => {/*comment*/
@@ -80,19 +84,19 @@ describe('MenuResolver', () => {
   describe('resolve', () => {
     it('should create all menus', (done) => {
       spyOn(resolver, 'createPublicMenu$').and.returnValue(observableOf(true));
-      spyOn(resolver, 'createAdminMenu$').and.returnValue(observableOf(true));
+      spyOn(resolver, 'createAdminMenuIfLoggedIn$').and.returnValue(observableOf(true));
 
       resolver.resolve(null, null).subscribe(resolved => {
         expect(resolved).toBeTrue();
         expect(resolver.createPublicMenu$).toHaveBeenCalled();
-        expect(resolver.createAdminMenu$).toHaveBeenCalled();
+        expect(resolver.createAdminMenuIfLoggedIn$).toHaveBeenCalled();
         done();
       });
     });
 
     it('should return an Observable that emits true as soon as all menus are created', () => {
       spyOn(resolver, 'createPublicMenu$').and.returnValue(cold('--(t|)', BOOLEAN));
-      spyOn(resolver, 'createAdminMenu$').and.returnValue(cold('----(t|)', BOOLEAN));
+      spyOn(resolver, 'createAdminMenuIfLoggedIn$').and.returnValue(cold('----(t|)', BOOLEAN));
 
       expect(resolver.resolve(null, null)).toBeObservable(cold('----(t|)', BOOLEAN));
     });

src/app/menu.resolver.ts

@@ -47,6 +47,7 @@ import {
 import {
   ExportBatchSelectorComponent
 } from './shared/dso-selector/modal-wrappers/export-batch-selector/export-batch-selector.component';
+import { AuthService } from './core/auth/auth.service';
 
 /**
  * Creates all of the app's menus
@@ -61,6 +62,7 @@ export class MenuResolver implements Resolve<boolean> {
     protected authorizationService: AuthorizationDataService,
     protected modalService: NgbModal,
     protected scriptDataService: ScriptDataService,
+    protected authService: AuthService,
   ) {
   }
 
@@ -70,7 +72,7 @@ export class MenuResolver implements Resolve<boolean> {
   resolve(route: ActivatedRouteSnapshot, state: RouterStateSnapshot): Observable<boolean> {
     return combineLatest([
       this.createPublicMenu$(),
-      this.createAdminMenu$(),
+      this.createAdminMenuIfLoggedIn$(),
     ]).pipe(
       map((menusDone: boolean[]) => menusDone.every(Boolean)),
     );
@@ -146,6 +148,15 @@ export class MenuResolver implements Resolve<boolean> {
     return this.waitForMenu$(MenuID.PUBLIC);
   }
 
+  /**
+   * Initialize all menu sections and items for {@link MenuID.ADMIN}, only if the user is logged in.
+   */
+  createAdminMenuIfLoggedIn$() {
+    return this.authService.isAuthenticated().pipe(
+      mergeMap((isAuthenticated) => isAuthenticated ? this.createAdminMenu$() : observableOf(true)),
+    );
+  }
+
   /**
    * Initialize all menu sections and items for {@link MenuID.ADMIN}
    */