64387: HAL endpoint refactoring

src/app/core/data/comcol-data.service.ts

@@ -6,6 +6,8 @@ import { ObjectCacheService } from '../cache/object-cache.service';
 import { CommunityDataService } from './community-data.service';
 
 import { DataService } from './data.service';
+import { PaginatedList } from './paginated-list';
+import { RemoteData } from './remote-data';
 import { FindListOptions, FindByIDRequest } from './request.models';
 import { HALEndpointService } from '../shared/hal-endpoint.service';
 import { getResponseFromEntry } from '../shared/operators';
@@ -57,4 +59,8 @@ export abstract class ComColDataService<T extends CacheableObject> extends DataS
       return observableMerge(errorResponses, successResponses).pipe(distinctUntilChanged(), share());
     }
   }
+
+  public findByParentCommunity(parentUUID: string): Observable<RemoteData<PaginatedList<T>>> {
+    this.halService.getEndpoint(`communities/${parentUUID}/collections`)
+  }
 }

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

@@ -247,4 +247,14 @@ export class ItemDataService extends DataService<Item> {
       map((request: RequestEntry) => request.response)
     );
   }
+
+  /**
+   * Get the endpoint for an item's bitstreams
+   * @param itemId
+   */
+  public getBitstreamsEndpoint(itemId: string): Observable<string> {
+    return this.halService.getEndpoint(this.linkPath).pipe(
+      switchMap((url: string) => this.halService.getEndpoint('bitstreams', `${url}/${itemId}`))
+    );
+  }
 }

src/app/core/shared/hal-endpoint.service.ts

@@ -43,8 +43,8 @@ export class HALEndpointService {
       );
   }
 
-  public getEndpoint(linkPath: string): Observable<string> {
-    return this.getEndpointAt(this.getRootHref(), ...linkPath.split('/'));
+  public getEndpoint(linkPath: string, startHref?: string): Observable<string> {
+    return this.getEndpointAt(startHref || this.getRootHref(), ...linkPath.split('/'));
   }
 
   /**