[CST-12235] support for the LDN inbox for root & /home & /item/:uuid pages

src/app/core/coar-notify/notify-info/notify-info.service.ts

@@ -10,7 +10,10 @@ import { ConfigurationProperty } from '../../shared/configuration-property.model
 })
 export class NotifyInfoService {
 
-  private relationLink = 'http://www.w3.org/ns/ldp#inbox';
+    /**
+     *  The relation link for the inbox
+     */
+    private _inboxRelationLink = 'http://www.w3.org/ns/ldp#inbox';
 
     constructor(
         private configService: ConfigurationDataService,
@@ -27,7 +30,11 @@ export class NotifyInfoService {
         );
     }
 
-    getCoarLdnLocalInboxUrl(): Observable<string[]> {
+    /**
+     * Get the url of the local inbox from the REST configuration
+     * @returns the url of the local inbox
+     */
+    getCoarLdnLocalInboxUrls(): Observable<string[]> {
       return this.configService.findByPropertyName('ldn.notify.local-inbox-endpoint').pipe(
         getFirstSucceededRemoteData(),
         getRemoteDataPayload(),
@@ -49,7 +56,11 @@ export class NotifyInfoService {
         return `${ssl ? 'https' : 'http'}://${host}:${port}${namespace}`;
     }
 
-    getRelationLink(): string{
+    /**
-      return this.relationLink;
+     * Method to get the relation link for the inbox
+     * @returns the relation link for the inbox
+     */
+    getInboxRelationLink(): string {
+      return this._inboxRelationLink;
     }
 }

src/app/home-page/home-page.component.ts

@@ -1,23 +1,28 @@
-import { Component, Inject, OnInit, PLATFORM_ID } from '@angular/core';
+import { Component, Inject, OnDestroy, OnInit, PLATFORM_ID } from '@angular/core';
 import { map, switchMap } from 'rxjs/operators';
 import { ActivatedRoute } from '@angular/router';
-import { Observable, of } from 'rxjs';
+import { Observable } from 'rxjs';
 import { Site } from '../core/shared/site.model';
 import { environment } from '../../environments/environment';
 import { isPlatformServer } from '@angular/common';
 import { ServerResponseService } from '../core/services/server-response.service';
 import { NotifyInfoService } from '../core/coar-notify/notify-info/notify-info.service';
 import { LinkDefinition, LinkHeadService } from '../core/services/link-head.service';
+import { isNotEmpty } from '../shared/empty.util';
 
 @Component({
   selector: 'ds-home-page',
   styleUrls: ['./home-page.component.scss'],
   templateUrl: './home-page.component.html'
 })
-export class HomePageComponent implements OnInit {
+export class HomePageComponent implements OnInit, OnDestroy {
 
   site$: Observable<Site>;
   recentSubmissionspageSize: number;
+  /**
+   * An array of LinkDefinition objects representing inbox links for the home page.
+   */
+  inboxLinks: LinkDefinition[] = [];
 
   constructor(
     private route: ActivatedRoute,
@@ -27,14 +32,18 @@ export class HomePageComponent implements OnInit {
     @Inject(PLATFORM_ID) private platformId: string
   ) {
     this.recentSubmissionspageSize = environment.homePage.recentSubmissions.pageSize;
+    // Get COAR REST API URLs from REST configuration
+    // only if COAR configuration is enabled
     this.notifyInfoService.isCoarConfigEnabled().pipe(
       switchMap((coarLdnEnabled: boolean) => {
         if (coarLdnEnabled) {
-          return this.notifyInfoService.getCoarLdnLocalInboxUrl();
+          return this.notifyInfoService.getCoarLdnLocalInboxUrls();
         }
       })
     ).subscribe((coarRestApiUrls: string[]) => {
-      this.initPageLinks(coarRestApiUrls);
+      if (coarRestApiUrls.length > 0) {
+        this.initPageLinks(coarRestApiUrls);
+      }
     });
   }
 
@@ -44,17 +53,37 @@ export class HomePageComponent implements OnInit {
     );
   }
 
+  /**
+   * Initializes page links for COAR REST API URLs.
+   * @param coarRestApiUrls An array of COAR REST API URLs.
+   */
   private initPageLinks(coarRestApiUrls: string[]): void {
-    const rel = this.notifyInfoService.getRelationLink();
+    const rel = this.notifyInfoService.getInboxRelationLink();
+    let links = '';
     coarRestApiUrls.forEach((coarRestApiUrl: string) => {
+      // Add link to head
       let tag: LinkDefinition = {
         href: coarRestApiUrl,
         rel: rel
       };
+      this.inboxLinks.push(tag);
       this.linkHeadService.addTag(tag);
-      if (isPlatformServer(this.platformId)) {
+
-        this.responseService.setHeader('Link', `<${coarRestApiUrl}>; rel="${rel}"`);
+      links = links + (isNotEmpty(links) ? ', ' : '') + `<${coarRestApiUrl}> ; rel="${rel}"`;
-      }
+    });
+
+    if (isPlatformServer(this.platformId)) {
+      // Add link to response header
+      this.responseService.setHeader('Link', links);
+    }
+  }
+
+  /**
+   * It removes the inbox links from the head of the html.
+   */
+  ngOnDestroy(): void {
+    this.inboxLinks.forEach((link: LinkDefinition) => {
+      this.linkHeadService.removeTag(`href='${link.href}'`);
     });
   }
 }

src/app/item-page/full/full-item-page.component.spec.ts

@@ -23,6 +23,7 @@ import { RemoteData } from '../../core/data/remote-data';
 import { ServerResponseService } from '../../core/services/server-response.service';
 import { SignpostingDataService } from '../../core/data/signposting-data.service';
 import { LinkHeadService } from '../../core/services/link-head.service';
+import { NotifyInfoService } from '../../core/coar-notify/notify-info/notify-info.service';
 
 const mockItem: Item = Object.assign(new Item(), {
   bundles: createSuccessfulRemoteDataObject$(createPaginatedList([])),
@@ -122,6 +123,7 @@ describe('FullItemPageComponent', () => {
         { provide: ServerResponseService, useValue: serverResponseService },
         { provide: SignpostingDataService, useValue: signpostingDataService },
         { provide: LinkHeadService, useValue: linkHeadService },
+        { provide: NotifyInfoService, useValue: {} },
         { provide: PLATFORM_ID, useValue: 'server' }
       ],
       schemas: [NO_ERRORS_SCHEMA]

src/app/item-page/full/full-item-page.component.ts

@@ -19,6 +19,7 @@ import { AuthorizationDataService } from '../../core/data/feature-authorization/
 import { ServerResponseService } from '../../core/services/server-response.service';
 import { SignpostingDataService } from '../../core/data/signposting-data.service';
 import { LinkHeadService } from '../../core/services/link-head.service';
+import { NotifyInfoService } from '../../core/coar-notify/notify-info/notify-info.service';
 
 /**
  * This component renders a full item page.
@@ -55,9 +56,10 @@ export class FullItemPageComponent extends ItemPageComponent implements OnInit,
     protected responseService: ServerResponseService,
     protected signpostingDataService: SignpostingDataService,
     protected linkHeadService: LinkHeadService,
+    protected notifyInfoService: NotifyInfoService,
     @Inject(PLATFORM_ID) protected platformId: string,
   ) {
-    super(route, router, items, authService, authorizationService, responseService, signpostingDataService, linkHeadService, platformId);
+    super(route, router, items, authService, authorizationService, responseService, signpostingDataService, linkHeadService,notifyInfoService, platformId);
   }
 
   /*** AoT inheritance fix, will hopefully be resolved in the near future **/

src/app/item-page/simple/item-page.component.spec.ts

@@ -26,6 +26,7 @@ import { ServerResponseService } from '../../core/services/server-response.servi
 import { SignpostingDataService } from '../../core/data/signposting-data.service';
 import { LinkDefinition, LinkHeadService } from '../../core/services/link-head.service';
 import { SignpostingLink } from '../../core/data/signposting-links.model';
+import { NotifyInfoService } from '../../core/coar-notify/notify-info/notify-info.service';
 
 const mockItem: Item = Object.assign(new Item(), {
   bundles: createSuccessfulRemoteDataObject$(createPaginatedList([])),
@@ -62,6 +63,7 @@ describe('ItemPageComponent', () => {
   let serverResponseService: jasmine.SpyObj<ServerResponseService>;
   let signpostingDataService: jasmine.SpyObj<SignpostingDataService>;
   let linkHeadService: jasmine.SpyObj<LinkHeadService>;
+  let notifyInfoService: jasmine.SpyObj<NotifyInfoService>;
 
   const mockMetadataService = {
     /* eslint-disable no-empty,@typescript-eslint/no-empty-function */
@@ -94,6 +96,12 @@ describe('ItemPageComponent', () => {
       removeTag: jasmine.createSpy('removeTag'),
     });
 
+    notifyInfoService = jasmine.createSpyObj('NotifyInfoService', {
+      getInboxRelationLink: 'http://www.w3.org/ns/ldp#inbox',
+      isCoarConfigEnabled: observableOf(true),
+      getCoarLdnLocalInboxUrls: observableOf(['http://test.org', 'http://test2.org']),
+    });
+
     TestBed.configureTestingModule({
       imports: [TranslateModule.forRoot({
         loader: {
@@ -112,6 +120,7 @@ describe('ItemPageComponent', () => {
         { provide: ServerResponseService, useValue: serverResponseService },
         { provide: SignpostingDataService, useValue: signpostingDataService },
         { provide: LinkHeadService, useValue: linkHeadService },
+        { provide: NotifyInfoService, useValue: notifyInfoService},
         { provide: PLATFORM_ID, useValue: 'server' },
       ],
 

src/app/item-page/simple/item-page.component.ts

@@ -2,8 +2,8 @@ import { ChangeDetectionStrategy, Component, Inject, OnDestroy, OnInit, PLATFORM
 import { ActivatedRoute, Router } from '@angular/router';
 import { isPlatformServer } from '@angular/common';
 
-import { Observable } from 'rxjs';
+import { Observable, combineLatest } from 'rxjs';
-import { map, take } from 'rxjs/operators';
+import { map, switchMap, take } from 'rxjs/operators';
 
 import { ItemDataService } from '../../core/data/item-data.service';
 import { RemoteData } from '../../core/data/remote-data';
@@ -21,6 +21,7 @@ import { SignpostingDataService } from '../../core/data/signposting-data.service
 import { SignpostingLink } from '../../core/data/signposting-links.model';
 import { isNotEmpty } from '../../shared/empty.util';
 import { LinkDefinition, LinkHeadService } from '../../core/services/link-head.service';
+import { NotifyInfoService } from 'src/app/core/coar-notify/notify-info/notify-info.service';
 
 /**
  * This component renders a simple item page.
@@ -68,6 +69,13 @@ export class ItemPageComponent implements OnInit, OnDestroy {
    */
   signpostingLinks: SignpostingLink[] = [];
 
+  /**
+   * An array of LinkDefinition objects representing inbox links for the item page.
+   */
+  inboxTags: LinkDefinition[] = [];
+
+  coarRestApiUrls: string[] = [];
+
   constructor(
     protected route: ActivatedRoute,
     protected router: Router,
@@ -77,6 +85,7 @@ export class ItemPageComponent implements OnInit, OnDestroy {
     protected responseService: ServerResponseService,
     protected signpostingDataService: SignpostingDataService,
     protected linkHeadService: LinkHeadService,
+    protected notifyInfoService: NotifyInfoService,
     @Inject(PLATFORM_ID) protected platformId: string
   ) {
     this.initPageLinks();
@@ -106,7 +115,8 @@ export class ItemPageComponent implements OnInit, OnDestroy {
    */
   private initPageLinks(): void {
     this.route.params.subscribe(params => {
-      this.signpostingDataService.getLinks(params.id).pipe(take(1)).subscribe((signpostingLinks: SignpostingLink[]) => {
+      combineLatest([this.signpostingDataService.getLinks(params.id).pipe(take(1)), this.getCoarLdnLocalInboxUrls()])
+      .subscribe(([signpostingLinks, coarRestApiUrls]) => {
         let links = '';
         this.signpostingLinks = signpostingLinks;
 
@@ -124,6 +134,11 @@ export class ItemPageComponent implements OnInit, OnDestroy {
           this.linkHeadService.addTag(tag);
         });
 
+        if (coarRestApiUrls.length > 0) {
+          let inboxLinks = this.initPageInboxLinks(coarRestApiUrls);
+          links = links + (isNotEmpty(links) ? ', ' : '') + inboxLinks;
+        }
+
         if (isPlatformServer(this.platformId)) {
           this.responseService.setHeader('Link', links);
         }
@@ -131,9 +146,49 @@ export class ItemPageComponent implements OnInit, OnDestroy {
     });
   }
 
+  /**
+   * Sets the COAR LDN local inbox URL if COAR configuration is enabled.
+   * If the COAR LDN local inbox URL is retrieved successfully, initializes the page inbox links.
+   */
+  private getCoarLdnLocalInboxUrls(): Observable<string[]> {
+   return this.notifyInfoService.isCoarConfigEnabled().pipe(
+      switchMap((coarLdnEnabled: boolean) => {
+        if (coarLdnEnabled) {
+          return this.notifyInfoService.getCoarLdnLocalInboxUrls();
+        }
+      })
+    );
+  }
+
+  /**
+   * Initializes the page inbox links.
+   * @param coarRestApiUrls - An array of COAR REST API URLs.
+   */
+  private initPageInboxLinks(coarRestApiUrls: string[]): string {
+    const rel = this.notifyInfoService.getInboxRelationLink();
+    let links = '';
+
+    coarRestApiUrls.forEach((coarRestApiUrl: string) => {
+      // Add link to head
+      let tag: LinkDefinition = {
+        href: coarRestApiUrl,
+        rel: rel
+      };
+      this.inboxTags.push(tag);
+      this.linkHeadService.addTag(tag);
+
+      links = links + (isNotEmpty(links) ? ', ' : '') + `<${coarRestApiUrl}> ; rel="${rel}"`;
+    });
+
+    return links;
+  }
+
   ngOnDestroy(): void {
     this.signpostingLinks.forEach((link: SignpostingLink) => {
       this.linkHeadService.removeTag(`href='${link.href}'`);
     });
+    this.inboxTags.forEach((link: LinkDefinition) => {
+      this.linkHeadService.removeTag(`href='${link.href}'`);
+    });
   }
 }