#4172 Several fixes to RSS component and object lists

* RSS button displayed on search result pages
* RSS button displayed on Recent Items component
* RSS button NOT displayed in other components
  like top-level community, etc.
* RSS component tracks sort option changes

src/app/home-page/recent-item-list/recent-item-list.component.html

@@ -3,6 +3,7 @@
     <div class="mt-4" [ngClass]="placeholderFontClass" @fadeIn>
       <div class="d-flex flex-row border-bottom mb-4 pb-4"></div>
       <h2> {{'home.recent-submissions.head' | translate}}</h2>
+      <ds-rss [sortConfig]="sortConfig"></ds-rss>
       @for (item of itemRD?.payload?.page; track item) {
         <div class="my-4">
           <ds-listable-object-component-loader [object]="item" [viewMode]="viewMode" class="pb-4">

src/app/home-page/recent-item-list/recent-item-list.component.ts

@@ -41,6 +41,7 @@ import { ErrorComponent } from '../../shared/error/error.component';
 import { ThemedLoadingComponent } from '../../shared/loading/themed-loading.component';
 import { ListableObjectComponentLoaderComponent } from '../../shared/object-collection/shared/listable-object/listable-object-component-loader.component';
 import { PaginationComponentOptions } from '../../shared/pagination/pagination-component-options.model';
+import { RSSComponent } from '../../shared/rss-feed/rss.component';
 import { PaginatedSearchOptions } from '../../shared/search/models/paginated-search-options.model';
 import {
   followLink,
@@ -59,7 +60,7 @@ import { VarDirective } from '../../shared/utils/var.directive';
     fadeInOut,
   ],
   standalone: true,
-  imports: [VarDirective, NgClass, ListableObjectComponentLoaderComponent, ErrorComponent, ThemedLoadingComponent, AsyncPipe, TranslateModule],
+  imports: [VarDirective, NgClass, ListableObjectComponentLoaderComponent, ErrorComponent, ThemedLoadingComponent, AsyncPipe, TranslateModule, RSSComponent],
 })
 export class RecentItemListComponent implements OnInit, OnDestroy {
   itemRD$: Observable<RemoteData<PaginatedList<Item>>>;

src/app/shared/object-collection/object-collection.component.html

@@ -13,6 +13,7 @@
     [linkType]="linkType"
     [context]="context"
     [hidePaginationDetail]="hidePaginationDetail"
+    [showRSS]="showRSS"
     [showPaginator]="showPaginator"
     [showThumbnails]="showThumbnails"
     (paginationChange)="onPaginationChange($event)"
@@ -58,6 +59,7 @@
     [sortConfig]="sortConfig"
     [objects]="objects"
     [hideGear]="hideGear"
+    [showRSS]="showRSS"
     [linkType]="linkType"
     [context]="context"
     [hidePaginationDetail]="hidePaginationDetail"

src/app/shared/object-collection/object-collection.component.ts

@@ -71,17 +71,22 @@ export class ObjectCollectionComponent implements OnInit {
   @Input() sortConfig: SortOptions;
 
   /**
-   * Whether or not the list elements have a border or not
+   * Whether the list elements have a border or not
    */
   @Input() hasBorder = false;
 
   /**
-   * Whether or not to hide the gear to change the sort and pagination configuration
+   * Whether to hide the gear to change the sort and pagination configuration
    */
   @Input() hideGear = false;
   @Input() selectable = false;
   @Input() selectionConfig: {repeatable: boolean, listId: string};
 
+  /**
+   * Whether to show an RSS syndication button for the current search options
+   */
+  @Input() showRSS = false;
+
   /**
    * Emit custom event for listable object custom actions.
    */

src/app/shared/object-detail/object-detail.component.html

@@ -4,6 +4,7 @@
   [sortOptions]="sortConfig"
   [objects]="objects"
   [hideGear]="hideGear"
+  [showRSS]="showRSS"
   [hidePaginationDetail]="hidePaginationDetail"
   [hidePagerWhenSinglePage]="hidePagerWhenSinglePage"
   [showPaginator]="showPaginator"

src/app/shared/object-detail/object-detail.component.ts

@@ -85,6 +85,8 @@ export class ObjectDetailComponent {
    */
   @Input() showThumbnails;
 
+  @Input() showRSS = false;
+
   /**
    * Emit when one of the listed object has changed.
    */

src/app/shared/object-list/object-list.component.html

@@ -4,6 +4,7 @@
   [objects]="objects"
   [sortOptions]="sortConfig"
   [hideGear]="hideGear"
+  [showRSS]="showRSS"
   [hidePagerWhenSinglePage]="hidePagerWhenSinglePage"
   [hidePaginationDetail]="hidePaginationDetail"
   [showPaginator]="showPaginator"

src/app/shared/object-list/object-list.component.ts

@@ -39,7 +39,7 @@ import { SelectableListService } from './selectable-list/selectable-list.service
 })
 export class ObjectListComponent {
   /**
-   * The view mode of the this component
+   * The view mode of this component
    */
   viewMode = ViewMode.ListElement;
 
@@ -70,6 +70,11 @@ export class ObjectListComponent {
   @Input() selectable = false;
   @Input() selectionConfig: { repeatable: boolean, listId: string };
 
+  /**
+   * Whether to show an RSS syndication button for the current search options
+   */
+  @Input() showRSS = false;
+
   /**
    * The link type of the listable elements
    */

src/app/shared/object-list/themed-object-list.component.ts

@@ -59,6 +59,8 @@ export class ThemedObjectListComponent extends ThemedComponent<ObjectListCompone
 
   @Input() selectionConfig: { repeatable: boolean, listId: string };
 
+  @Input() showRSS = false;
+
   /**
    * The link type of the listable elements
    */
@@ -163,6 +165,7 @@ export class ThemedObjectListComponent extends ThemedComponent<ObjectListCompone
     'sortConfig',
     'hasBorder',
     'hideGear',
+    'showRSS',
     'hidePagerWhenSinglePage',
     'selectable',
     'selectionConfig',

src/app/shared/pagination/pagination.component.html

@@ -43,7 +43,9 @@
                 </ul>
               </div>
             }
-            <ds-rss></ds-rss>
+            @if (showRSS) {
+              <ds-rss [sortConfig]="this.sortOptions"></ds-rss>
+            }
           </div>
         </div>
       </div>

src/app/shared/pagination/pagination.component.ts

@@ -168,6 +168,13 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
    */
   @Input() public retainScrollPosition = false;
 
+  /**
+   * Options for showing or hiding the RSS syndication feed. This is useful for e.g. top-level community lists
+   * or other lists where an RSS feed doesn't make sense, but uses the same components as recent items or search result
+   * lists.
+   */
+  @Input() public showRSS = false;
+
   /**
    * Current page.
    */
@@ -266,7 +273,6 @@ export class PaginationComponent implements OnChanges, OnDestroy, OnInit {
    * Initializes all default variables
    */
   private initializeConfig() {
-    // Set initial values
     this.id = this.paginationOptions.id || null;
     this.pageSizeOptions = this.paginationOptions.pageSizeOptions;
     this.currentPage$ = this.paginationService.getCurrentPagination(this.id, this.paginationOptions).pipe(

src/app/shared/rss-feed/rss.component.ts

@@ -2,12 +2,16 @@ import { AsyncPipe } from '@angular/common';
 import {
   ChangeDetectionStrategy,
   Component,
+  Input,
+  OnChanges,
   OnDestroy,
   OnInit,
+  SimpleChanges,
   ViewEncapsulation,
 } from '@angular/core';
 import {
   ActivatedRoute,
+  NavigationEnd,
   Router,
 } from '@angular/router';
 import {
@@ -16,12 +20,10 @@ import {
 } from '@ngx-translate/core';
 import {
   BehaviorSubject,
+  filter,
   Subscription,
 } from 'rxjs';
-import {
-  map,
-  switchMap,
-} from 'rxjs/operators';
+import { map } from 'rxjs/operators';
 
 import { environment } from '../../../environments/environment';
 import { SortOptions } from '../../core/cache/models/sort-options.model';
@@ -31,13 +33,14 @@ import { GroupDataService } from '../../core/eperson/group-data.service';
 import { PaginationService } from '../../core/pagination/pagination.service';
 import { LinkHeadService } from '../../core/services/link-head.service';
 import { getFirstCompletedRemoteData } from '../../core/shared/operators';
+import { SearchService } from '../../core/shared/search/search.service';
 import { SearchConfigurationService } from '../../core/shared/search/search-configuration.service';
 import {
   hasValue,
   isUndefined,
 } from '../empty.util';
-import { PaginatedSearchOptions } from '../search/models/paginated-search-options.model';
 import { SearchFilter } from '../search/models/search-filter.model';
+
 /**
  * The Rss feed button component.
  */
@@ -51,30 +54,28 @@ import { SearchFilter } from '../search/models/search-filter.model';
   standalone: true,
   imports: [AsyncPipe, TranslateModule],
 })
-export class RSSComponent implements OnInit, OnDestroy  {
+export class RSSComponent implements OnInit, OnDestroy, OnChanges {
 
   route$: BehaviorSubject<string> = new BehaviorSubject<string>('');
-
   isEnabled$: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(null);
-
   isActivated$: BehaviorSubject<boolean> = new BehaviorSubject<boolean>(false);
+  @Input() sortConfig?: SortOptions;
 
   uuid: string;
-
   subs: Subscription[] = [];
+  openSearchUri: string;
 
   constructor(private groupDataService: GroupDataService,
               private linkHeadService: LinkHeadService,
               private configurationService: ConfigurationDataService,
               private searchConfigurationService: SearchConfigurationService,
+              private searchService: SearchService,
               private router: Router,
               private route: ActivatedRoute,
               protected paginationService: PaginationService,
               protected translateService: TranslateService) {
   }
-  /**
-   * Removes the linktag created when the component gets removed from the page.
-   */
+
   ngOnDestroy(): void {
     this.linkHeadService.removeTag("rel='alternate'");
     this.subs.forEach(sub => {
@@ -82,24 +83,52 @@ export class RSSComponent implements OnInit, OnDestroy  {
     });
   }
 
-
-  /**
-   * Generates the link tags and the url to opensearch when the component is loaded.
-   */
   ngOnInit(): void {
+    // Set initial activation state
     if (hasValue(this.route.snapshot.data?.enableRSS)) {
       this.isActivated$.next(this.route.snapshot.data.enableRSS);
     } else if (isUndefined(this.route.snapshot.data?.enableRSS)) {
       this.isActivated$.next(false);
     }
+
+    // Get initial UUID from URL
+    this.uuid = this.groupDataService.getUUIDFromString(this.router.url);
+
+    // Check if RSS is enabled
     this.subs.push(this.configurationService.findByPropertyName('websvc.opensearch.enable').pipe(
       getFirstCompletedRemoteData(),
     ).subscribe((result) => {
       if (result.hasSucceeded) {
         const enabled = (result.payload.values[0] === 'true');
         this.isEnabled$.next(enabled);
+
+        // If enabled, get the OpenSearch URI
+        if (enabled) {
+          this.getOpenSearchUri();
+        }
       }
     }));
+
+    // Listen for navigation events to update the UUID
+    this.subs.push(this.router.events.pipe(
+      filter(event => event instanceof NavigationEnd),
+    ).subscribe(() => {
+      this.uuid = this.groupDataService.getUUIDFromString(this.router.url);
+      this.updateRssLinks();
+    }));
+  }
+
+  ngOnChanges(changes: SimpleChanges): void {
+    // If sortConfig changes, update the RSS links
+    if (changes.sortConfig && this.openSearchUri && this.isEnabled$.getValue()) {
+      this.updateRssLinks();
+    }
+  }
+
+  /**
+   * Get the OpenSearch URI and update RSS links
+   */
+  private getOpenSearchUri(): void {
     this.subs.push(this.configurationService.findByPropertyName('websvc.opensearch.svccontext').pipe(
       getFirstCompletedRemoteData(),
       map((result: RemoteData<any>) => {
@@ -108,35 +137,60 @@ export class RSSComponent implements OnInit, OnDestroy  {
         }
         return null;
       }),
-      switchMap((openSearchUri: string) =>
-        this.searchConfigurationService.paginatedSearchOptions.pipe(
-          map((searchOptions: PaginatedSearchOptions) => ({ openSearchUri,  searchOptions })),
-        ),
-      ),
-    ).subscribe(({ openSearchUri,  searchOptions }) => {
-      if (!openSearchUri) {
-        return null;
-      }
-      this.uuid = this.groupDataService.getUUIDFromString(this.router.url);
-      const route = environment.rest.baseUrl + this.formulateRoute(this.uuid, openSearchUri, searchOptions.sort, searchOptions.query, searchOptions.filters, searchOptions.configuration, searchOptions.pagination?.pageSize, searchOptions.fixedFilter);
-      this.addLinks(route);
-      this.linkHeadService.addTag({
-        href: environment.rest.baseUrl + '/' + openSearchUri + '/service',
-        type: 'application/atom+xml',
-        rel: 'search',
-        title: 'Dspace',
-      });
-      this.route$.next(route);
+      filter(uri => !!uri),
+    ).subscribe(uri => {
+      this.openSearchUri = uri;
+      this.updateRssLinks();
     }));
   }
 
   /**
-   * Function created a route given the different params available to opensearch
-   * @param uuid The uuid if a scope is present
-   * @param opensearch openSearch uri
-   * @param sort The sort options for the opensearch request
-   * @param query The query string that was provided in the search
-   * @returns The combine URL to opensearch
+   * Update RSS links based on current search configuration and sortConfig input
+   */
+  private updateRssLinks(): void {
+    if (!this.openSearchUri || !this.isEnabled$.getValue()) {
+      return;
+    }
+
+    // Remove existing link tags before adding new ones
+    this.linkHeadService.removeTag("rel='alternate'");
+
+    // Get the current search options and apply our sortConfig if provided
+    const searchOptions = this.searchConfigurationService.paginatedSearchOptions.value;
+    const modifiedOptions = { ...searchOptions };
+    if (hasValue(this.sortConfig)) {
+      modifiedOptions.sort = this.sortConfig;
+    }
+
+    // Create the RSS feed URL
+    const route = environment.rest.baseUrl + this.formulateRoute(
+      this.uuid,
+      this.openSearchUri,
+      modifiedOptions.sort,
+      modifiedOptions.query,
+      modifiedOptions.filters,
+      modifiedOptions.configuration,
+      modifiedOptions.pagination?.pageSize,
+      modifiedOptions.fixedFilter,
+    );
+
+    // Add the link tags
+    this.addLinks(route);
+
+    // Add the OpenSearch service link
+    this.linkHeadService.addTag({
+      href: environment.rest.baseUrl + '/' + this.openSearchUri + '/service',
+      type: 'application/atom+xml',
+      rel: 'search',
+      title: 'Dspace',
+    });
+
+    // Update the route subject
+    this.route$.next(route);
+  }
+
+  /**
+   * Create a route given the different params available to opensearch
    */
   formulateRoute(uuid: string, opensearch: string, sort?: SortOptions, query?: string, searchFilters?: SearchFilter[], configuration?: string, pageSize?: number, fixedFilter?: string): string {
     let route = 'format=atom';
@@ -158,9 +212,9 @@ export class RSSComponent implements OnInit, OnDestroy  {
       route += `&rpp=${pageSize}`;
     }
     if (searchFilters) {
-      for (const filter of searchFilters) {
-        for (const val of filter.values) {
-          route += '&' + filter.key + '=' + encodeURIComponent(val) + (filter.operator ? ',' + filter.operator : '');
+      for (const searchFilter of searchFilters) {
+        for (const val of searchFilter.values) {
+          route += '&' + searchFilter.key + '=' + encodeURIComponent(val) + (searchFilter.operator ? ',' + searchFilter.operator : '');
         }
       }
     }
@@ -171,20 +225,8 @@ export class RSSComponent implements OnInit, OnDestroy  {
     return route;
   }
 
-  /**
-   * Check if the router url contains the specified route
-   *
-   * @param {string} route
-   * @returns
-   * @memberof MyComponent
-   */
-  hasRoute(route: string) {
-    return this.router.url.includes(route);
-  }
-
   /**
    * Creates <link> tags in the header of the page
-   * @param route The composed url to opensearch
    */
   addLinks(route: string): void {
     this.linkHeadService.addTag({
@@ -201,5 +243,4 @@ export class RSSComponent implements OnInit, OnDestroy  {
       title: 'Sitewide RSS feed',
     });
   }
-
 }

src/app/shared/search/search-results/search-results.component.html

@@ -25,6 +25,7 @@
       [sortConfig]="searchConfig.sort"
       [objects]="searchResults"
       [hideGear]="true"
+      [showRSS]="true"
       [selectable]="selectable"
       [selectionConfig]="selectionConfig"
       [linkType]="linkType"