[CST-5676] Breadcrumbs changes

src/app/bitstream-page/bitstream-page-routing.module.ts

@@ -10,6 +10,7 @@ import { ResourcePolicyResolver } from '../shared/resource-policies/resolvers/re
 import { ResourcePolicyEditComponent } from '../shared/resource-policies/edit/resource-policy-edit.component';
 import { BitstreamAuthorizationsComponent } from './bitstream-authorizations/bitstream-authorizations.component';
 import { LegacyBitstreamUrlResolver } from './legacy-bitstream-url.resolver';
+import { BitstreamBreadcrumbResolver } from '../core/breadcrumbs/bitstream-breadcrumb.resolver';
 
 const EDIT_BITSTREAM_PATH = ':id/edit';
 const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
@@ -25,7 +26,8 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
         path: 'handle/:prefix/:suffix/:filename',
         component: BitstreamDownloadPageComponent,
         resolve: {
-          bitstream: LegacyBitstreamUrlResolver
+          bitstream: LegacyBitstreamUrlResolver,
+          breadcrumb: BitstreamBreadcrumbResolver
         },
       },
       {
@@ -33,7 +35,8 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
         path: ':prefix/:suffix/:sequence_id/:filename',
         component: BitstreamDownloadPageComponent,
         resolve: {
-          bitstream: LegacyBitstreamUrlResolver
+          bitstream: LegacyBitstreamUrlResolver,
+          breadcrumb: BitstreamBreadcrumbResolver
         },
       },
       {
@@ -41,14 +44,16 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
         path: ':id/download',
         component: BitstreamDownloadPageComponent,
         resolve: {
-          bitstream: BitstreamPageResolver
+          bitstream: BitstreamPageResolver,
+          breadcrumb: BitstreamBreadcrumbResolver
         },
       },
       {
         path: EDIT_BITSTREAM_PATH,
         component: EditBitstreamPageComponent,
         resolve: {
-          bitstream: BitstreamPageResolver
+          bitstream: BitstreamPageResolver,
+          breadcrumb: BitstreamBreadcrumbResolver
         },
         canActivate: [AuthenticatedGuard]
       },
@@ -59,7 +64,8 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
           {
             path: 'create',
             resolve: {
-              resourcePolicyTarget: ResourcePolicyTargetResolver
+              resourcePolicyTarget: ResourcePolicyTargetResolver,
+              breadcrumb: BitstreamBreadcrumbResolver
             },
             component: ResourcePolicyCreateComponent,
             data: { title: 'resource-policies.create.page.title', showBreadcrumbs: true }
@@ -67,7 +73,8 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
           {
             path: 'edit',
             resolve: {
-              resourcePolicy: ResourcePolicyResolver
+              resourcePolicy: ResourcePolicyResolver,
+              breadcrumb: BitstreamBreadcrumbResolver
             },
             component: ResourcePolicyEditComponent,
             data: { title: 'resource-policies.edit.page.title', showBreadcrumbs: true }
@@ -75,7 +82,8 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
           {
             path: '',
             resolve: {
-              bitstream: BitstreamPageResolver
+              bitstream: BitstreamPageResolver,
+              breadcrumb: BitstreamBreadcrumbResolver
             },
             component: BitstreamAuthorizationsComponent,
             data: { title: 'bitstream.edit.authorizations.title', showBreadcrumbs: true }
@@ -86,6 +94,7 @@ const EDIT_BITSTREAM_AUTHORIZATIONS_PATH = ':id/authorizations';
   ],
   providers: [
     BitstreamPageResolver,
+    BitstreamBreadcrumbResolver
   ]
 })
 export class BitstreamPageRoutingModule {

src/app/bitstream-page/bitstream-page.resolver.ts

@@ -7,6 +7,19 @@ import { BitstreamDataService } from '../core/data/bitstream-data.service';
 import { followLink, FollowLinkConfig } from '../shared/utils/follow-link-config.model';
 import { getFirstCompletedRemoteData } from '../core/shared/operators';
 
+/**
+ * The self links defined in this list are expected to be requested somewhere in the near future
+ * Requesting them as embeds will limit the number of requests
+ */
+ export const BITSTREAM_PAGE_LINKS_TO_FOLLOW: FollowLinkConfig<Bitstream>[] = [
+  followLink('format', {},
+    followLink('parentCommunity', {},
+      followLink('parentCommunity'))
+  ),
+  followLink('bundle'),
+  followLink('thumbnail')
+];
+
 /**
  * This class represents a resolver that requests a specific bitstream before the route is activated
  */

src/app/core/breadcrumbs/bitstream-breadcrumb.resolver.ts

@@ -0,0 +1,28 @@
+import { Injectable } from '@angular/core';
+import { DSOBreadcrumbsService } from './dso-breadcrumbs.service';
+import { DSOBreadcrumbResolver } from './dso-breadcrumb.resolver';
+import { FollowLinkConfig } from '../../shared/utils/follow-link-config.model';
+import { Bitstream } from '../shared/bitstream.model';
+import { BitstreamDataService } from '../data/bitstream-data.service';
+import { BITSTREAM_PAGE_LINKS_TO_FOLLOW } from 'src/app/bitstream-page/bitstream-page.resolver';
+
+/**
+ * The class that resolves the BreadcrumbConfig object for an Item
+ */
+@Injectable({
+  providedIn: 'root'
+})
+export class BitstreamBreadcrumbResolver extends DSOBreadcrumbResolver<Bitstream> {
+  constructor(protected breadcrumbService: DSOBreadcrumbsService, protected dataService: BitstreamDataService) {
+    super(breadcrumbService, dataService);
+  }
+
+  /**
+   * Method that returns the follow links to already resolve
+   * The self links defined in this list are expected to be requested somewhere in the near future
+   * Requesting them as embeds will limit the number of requests
+   */
+  get followLinks(): FollowLinkConfig<Bitstream>[] {
+    return BITSTREAM_PAGE_LINKS_TO_FOLLOW;
+  }
+}

src/app/core/shared/bitstream.model.ts

@@ -7,13 +7,13 @@ import { BITSTREAM_FORMAT } from './bitstream-format.resource-type';
 import { BITSTREAM } from './bitstream.resource-type';
 import { DSpaceObject } from './dspace-object.model';
 import { HALLink } from './hal-link.model';
-import { HALResource } from './hal-resource.model';
 import {BUNDLE} from './bundle.resource-type';
 import {Bundle} from './bundle.model';
+import { ChildHALResource } from './child-hal-resource.model';
 
 @typedObject
 @inheritSerialization(DSpaceObject)
-export class Bitstream extends DSpaceObject implements HALResource {
+export class Bitstream extends DSpaceObject implements ChildHALResource {
   static type = BITSTREAM;
 
   /**
@@ -66,4 +66,8 @@ export class Bitstream extends DSpaceObject implements HALResource {
    */
   @link(BUNDLE)
   bundle?: Observable<RemoteData<Bundle>>;
+
+  getParentLinkKey(): keyof this['_links'] {
+    return 'format';
+  }
 }