113169: Renamed the service in charge of adding metadata head tags to you HTML to HeadTagService & made its methods protected to make it easier to override them

2025-10-07 18:14:17 +00:00 · 2024-03-15 16:12:22 +01:00
parent 404ccd9b0e
commit 179e7e0543
14 changed files with 95 additions and 170 deletions
--- a/src/app/app.component.spec.ts
+++ b/src/app/app.component.spec.ts
@@ -9,11 +9,11 @@ import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
 import { AppComponent } from './app.component';
 import { HostWindowState } from './shared/search/host-window.reducer';
 import { HostWindowResizeAction } from './shared/host-window.actions';
-import { MetadataService } from './core/metadata/metadata.service';
+import { HeadTagService } from './core/metadata/head-tag.service';

 import { NativeWindowRef, NativeWindowService } from './core/services/window.service';
 import { TranslateLoaderMock } from './shared/mocks/translate-loader.mock';
-import { MetadataServiceMock } from './shared/mocks/metadata-service.mock';
+import { HeadTagServiceMock } from './shared/mocks/head-tag-service.mock';
 import { AngularticsProviderMock } from './shared/mocks/angulartics-provider.service.mock';
 import { AuthServiceMock } from './shared/mocks/auth.service.mock';
 import { AuthService } from './core/auth/auth.service';
@@ -71,7 +71,7 @@ describe('App component', () => {
      declarations: [AppComponent], // declare the test component
      providers: [
        { provide: NativeWindowService, useValue: new NativeWindowRef() },
-        { provide: MetadataService, useValue: new MetadataServiceMock() },
+        { provide: HeadTagService, useValue: new HeadTagServiceMock() },
        { provide: Angulartics2DSpace, useValue: new AngularticsProviderMock() },
        { provide: AuthService, useValue: new AuthServiceMock() },
        { provide: Router, useValue: new RouterMock() },
--- a/src/app/community-page/community-page.component.ts
+++ b/src/app/community-page/community-page.component.ts
@@ -3,14 +3,10 @@ import { ChangeDetectionStrategy, Component, OnInit } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';

 import { Observable } from 'rxjs';
-import { CommunityDataService } from '../core/data/community-data.service';
 import { RemoteData } from '../core/data/remote-data';
 import { Bitstream } from '../core/shared/bitstream.model';

 import { Community } from '../core/shared/community.model';
-
-import { MetadataService } from '../core/metadata/metadata.service';
-
 import { fadeInOut } from '../shared/animations/fade';
 import { hasValue } from '../shared/empty.util';
 import { getAllSucceededRemoteDataPayload} from '../core/shared/operators';
@@ -53,8 +49,6 @@ export class CommunityPageComponent implements OnInit {
  communityPageRoute$: Observable<string>;

  constructor(
-    private communityDataService: CommunityDataService,
-    private metadata: MetadataService,
    private route: ActivatedRoute,
    private router: Router,
    private authService: AuthService,
--- a/src/app/core/core.module.ts
+++ b/src/app/core/core.module.ts
@@ -64,7 +64,7 @@ import { Group } from './eperson/models/group.model';
 import { JsonPatchOperationsBuilder } from './json-patch/builder/json-patch-operations-builder';
 import { MetadataField } from './metadata/metadata-field.model';
 import { MetadataSchema } from './metadata/metadata-schema.model';
-import { MetadataService } from './metadata/metadata.service';
+import { HeadTagService } from './metadata/head-tag.service';
 import { RegistryService } from './registry/registry.service';
 import { RoleService } from './roles/role.service';
 import { FeedbackDataService } from './feedback/feedback-data.service';
@@ -218,7 +218,7 @@ const PROVIDERS = [
  HALEndpointService,
  HostWindowService,
  ItemDataService,
-  MetadataService,
+  HeadTagService,
  ObjectCacheService,
  PaginationComponentOptions,
  ResourcePolicyDataService,
--- a/src/app/core/metadata/head-tag.service.spec.ts
+++ b/src/app/core/metadata/head-tag.service.spec.ts
@@ -19,7 +19,7 @@ import { PaginatedList } from '../data/paginated-list.model';
 import { Bitstream } from '../shared/bitstream.model';
 import { MetadataValue } from '../shared/metadata.models';

-import { MetadataService } from './metadata.service';
+import { HeadTagService } from './head-tag.service';
 import { RootDataService } from '../data/root-data.service';
 import { Bundle } from '../shared/bundle.model';
 import { createPaginatedList } from '../../shared/testing/utils.test';
@@ -31,8 +31,8 @@ import { AddMetaTagAction, ClearMetaTagAction } from './meta-tag.actions';
 import { AuthorizationDataService } from '../data/feature-authorization/authorization-data.service';
 import { AppConfig } from '../../../config/app-config.interface';

-describe('MetadataService', () => {
-  let metadataService: MetadataService;
+describe('HeadTagService', () => {
+  let headTagService: HeadTagService;

  let meta: Meta;

@@ -41,7 +41,6 @@ describe('MetadataService', () => {
  let dsoNameService: DSONameService;

  let bundleDataService;
-  let bitstreamDataService;
  let rootService: RootDataService;
  let translateService: TranslateService;
  let hardRedirectService: HardRedirectService;
@@ -59,9 +58,6 @@ describe('MetadataService', () => {
    rootService = jasmine.createSpyObj({
      findRoot: createSuccessfulRemoteDataObject$({ dspaceVersion: 'mock-dspace-version' })
    });
-    bitstreamDataService = jasmine.createSpyObj({
-      findListByHref: createSuccessfulRemoteDataObject$(createPaginatedList([MockBitstream3])),
-    });
    bundleDataService = jasmine.createSpyObj({
      findByItemAndName: mockBundleRD$([MockBitstream3])
    });
@@ -102,15 +98,13 @@ describe('MetadataService', () => {
      }
    } as any;

-    metadataService = new MetadataService(
+    headTagService = new HeadTagService(
      router,
      translateService,
      meta,
      title,
      dsoNameService,
      bundleDataService,
-      bitstreamDataService,
-      undefined,
      rootService,
      store,
      hardRedirectService,
@@ -120,7 +114,7 @@ describe('MetadataService', () => {
  });

  it('items page should set meta tags', fakeAsync(() => {
-    (metadataService as any).processRouteChange({
+    (headTagService as any).processRouteChange({
      data: {
        value: {
          dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -147,7 +141,7 @@ describe('MetadataService', () => {
  }));

  it('items page should set meta tags as published Thesis', fakeAsync(() => {
-    (metadataService as any).processRouteChange({
+    (headTagService as any).processRouteChange({
      data: {
        value: {
          dso: createSuccessfulRemoteDataObject(mockPublisher(mockType(ItemMock, 'Thesis'))),
@@ -166,7 +160,7 @@ describe('MetadataService', () => {
  }));

  it('items page should set meta tags as published Technical Report', fakeAsync(() => {
-    (metadataService as any).processRouteChange({
+    (headTagService as any).processRouteChange({
      data: {
        value: {
          dso: createSuccessfulRemoteDataObject(mockPublisher(mockType(ItemMock, 'Technical Report'))),
@@ -182,7 +176,7 @@ describe('MetadataService', () => {

  it('route titles should overwrite dso titles', fakeAsync(() => {
    (translateService.get as jasmine.Spy).and.returnValues(of('DSpace :: '), of('Translated Route Title'));
-    (metadataService as any).processRouteChange({
+    (headTagService as any).processRouteChange({
      data: {
        value: {
          dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -198,7 +192,7 @@ describe('MetadataService', () => {

  it('other navigation should add title and description', fakeAsync(() => {
    (translateService.get as jasmine.Spy).and.returnValues(of('DSpace :: '), of('Dummy Title'), of('This is a dummy item component for testing!'));
-    (metadataService as any).processRouteChange({
+    (headTagService as any).processRouteChange({
      data: {
        value: {
          title: 'Dummy Title',
@@ -220,14 +214,14 @@ describe('MetadataService', () => {

  describe(`listenForRouteChange`, () => {
    it(`should call processRouteChange`, fakeAsync(() => {
-      spyOn(metadataService as any, 'processRouteChange').and.callFake(() => undefined);
-      metadataService.listenForRouteChange();
+      spyOn(headTagService as any, 'processRouteChange').and.callFake(() => undefined);
+      headTagService.listenForRouteChange();
      tick();
-      expect((metadataService as any).processRouteChange).toHaveBeenCalled();
+      expect((headTagService as any).processRouteChange).toHaveBeenCalled();
    }));
    it(`should add Generator`, fakeAsync(() => {
-      spyOn(metadataService as any, 'processRouteChange').and.callFake(() => undefined);
-      metadataService.listenForRouteChange();
+      spyOn(headTagService as any, 'processRouteChange').and.callFake(() => undefined);
+      headTagService.listenForRouteChange();
      tick();
      expect(meta.addTag).toHaveBeenCalledWith({
        name: 'Generator',
@@ -238,7 +232,7 @@ describe('MetadataService', () => {

  describe('citation_abstract_html_url', () => {
    it('should use dc.identifier.uri if available', fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(mockUri(ItemMock, 'https://ddg.gg')),
@@ -253,7 +247,7 @@ describe('MetadataService', () => {
    }));

    it('should use current route as fallback', fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(mockUri(ItemMock)),
@@ -270,7 +264,7 @@ describe('MetadataService', () => {

  describe('citation_*_institution / citation_publisher', () => {
    it('should use citation_dissertation_institution tag for dissertations', fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(mockPublisher(mockType(ItemMock, 'Thesis'))),
@@ -287,7 +281,7 @@ describe('MetadataService', () => {
    }));

    it('should use citation_tech_report_institution tag for tech reports', fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(mockPublisher(mockType(ItemMock, 'Technical Report'))),
@@ -304,7 +298,7 @@ describe('MetadataService', () => {
    }));

    it('should use citation_publisher for other item types', fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(mockPublisher(mockType(ItemMock, 'Some Other Type'))),
@@ -325,7 +319,7 @@ describe('MetadataService', () => {
    it('should link to primary Bitstream URL regardless of format', fakeAsync(() => {
      (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$([], MockBitstream3));

-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -344,7 +338,7 @@ describe('MetadataService', () => {
        (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$([MockBitstream3]));
        (authorizationService.isAuthorized as jasmine.Spy).and.returnValue(observableOf(false));

-        (metadataService as any).processRouteChange({
+        (headTagService as any).processRouteChange({
          data: {
            value: {
              dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -361,7 +355,7 @@ describe('MetadataService', () => {
      it('should link to first and only Bitstream regardless of format', fakeAsync(() => {
        (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$([MockBitstream3]));

-        (metadataService as any).processRouteChange({
+        (headTagService as any).processRouteChange({
          data: {
            value: {
              dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -381,13 +375,10 @@ describe('MetadataService', () => {
        beforeEach(() => {
          bitstreams = [MockBitstream2, MockBitstream3, MockBitstream1];
          (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$(bitstreams));
-          (bitstreamDataService.findListByHref as jasmine.Spy).and.returnValues(
-            ...mockBitstreamPages$(bitstreams).map(bp => createSuccessfulRemoteDataObject$(bp)),
-          );
        });

        it('should link to first Bitstream with allowed format', fakeAsync(() => {
-          (metadataService as any).processRouteChange({
+          (headTagService as any).processRouteChange({
            data: {
              value: {
                dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -412,13 +403,10 @@ describe('MetadataService', () => {
    beforeEach(() => {
      bitstreams = [MockBitstream1, MockBitstream3, MockBitstream2];
      (bundleDataService.findByItemAndName as jasmine.Spy).and.returnValue(mockBundleRD$(bitstreams));
-      (bitstreamDataService.findListByHref as jasmine.Spy).and.returnValues(
-        ...mockBitstreamPages$(bitstreams).map(bp => createSuccessfulRemoteDataObject$(bp)),
-      );
    });

    it(`shouldn't add a citation_pdf_url meta tag`, fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(ItemMock),
@@ -437,7 +425,7 @@ describe('MetadataService', () => {

  describe('tagstore', () => {
    beforeEach(fakeAsync(() => {
-      (metadataService as any).processRouteChange({
+      (headTagService as any).processRouteChange({
        data: {
          value: {
            dso: createSuccessfulRemoteDataObject(ItemMock),
--- a/src/app/core/metadata/head-tag.service.ts
+++ b/src/app/core/metadata/head-tag.service.ts
@@ -17,8 +17,6 @@ import { filter, map, switchMap, take, mergeMap } from 'rxjs/operators';

 import { hasNoValue, hasValue, isNotEmpty } from '../../shared/empty.util';
 import { DSONameService } from '../breadcrumbs/dso-name.service';
-import { BitstreamDataService } from '../data/bitstream-data.service';
-import { BitstreamFormatDataService } from '../data/bitstream-format-data.service';

 import { RemoteData } from '../data/remote-data';
 import { BitstreamFormat } from '../shared/bitstream-format.model';
@@ -64,7 +62,7 @@ const tagsInUseSelector =
  );

@Injectable()
-export class MetadataService {
+export class HeadTagService {

  private currentObject: BehaviorSubject<DSpaceObject> = new BehaviorSubject<DSpaceObject>(undefined);

@@ -84,19 +82,17 @@ export class MetadataService {
  ];

  constructor(
-    private router: Router,
-    private translate: TranslateService,
-    private meta: Meta,
-    private title: Title,
-    private dsoNameService: DSONameService,
-    private bundleDataService: BundleDataService,
-    private bitstreamDataService: BitstreamDataService,
-    private bitstreamFormatDataService: BitstreamFormatDataService,
-    private rootService: RootDataService,
-    private store: Store<CoreState>,
-    private hardRedirectService: HardRedirectService,
-    @Inject(APP_CONFIG) private appConfig: AppConfig,
-    private authorizationService: AuthorizationDataService
+    protected router: Router,
+    protected translate: TranslateService,
+    protected meta: Meta,
+    protected title: Title,
+    protected dsoNameService: DSONameService,
+    protected bundleDataService: BundleDataService,
+    protected rootService: RootDataService,
+    protected store: Store<CoreState>,
+    protected hardRedirectService: HardRedirectService,
+    @Inject(APP_CONFIG) protected appConfig: AppConfig,
+    protected authorizationService: AuthorizationDataService
  ) {
  }

@@ -115,7 +111,7 @@ export class MetadataService {
    });
  }

-  private processRouteChange(routeInfo: any): void {
+  protected processRouteChange(routeInfo: any): void {
    this.clearMetaTags();

    if (hasValue(routeInfo.data.value.dso) && hasValue(routeInfo.data.value.dso.payload)) {
@@ -138,14 +134,14 @@ export class MetadataService {
    }
  }

-  private getCurrentRoute(route: ActivatedRoute): ActivatedRoute {
+  protected getCurrentRoute(route: ActivatedRoute): ActivatedRoute {
    while (route.firstChild) {
      route = route.firstChild;
    }
    return route;
  }

-  private setDSOMetaTags(): void {
+  protected setDSOMetaTags(): void {

    this.setTitleTag();
    this.setDescriptionTag();
@@ -187,7 +183,7 @@ export class MetadataService {
  /**
   * Add <meta name="title" ... >  to the <head>
   */
-  private setTitleTag(): void {
+  protected setTitleTag(): void {
    const value = this.dsoNameService.getName(this.currentObject.getValue());
    this.addMetaTag('title', value);
    this.title.setTitle(value);
@@ -196,7 +192,7 @@ export class MetadataService {
  /**
   * Add <meta name="description" ... >  to the <head>
   */
-  private setDescriptionTag(): void {
+  protected setDescriptionTag(): void {
    // TODO: truncate abstract
    const value = this.getMetaTagValue('dc.description.abstract');
    this.addMetaTag('description', value);
@@ -205,7 +201,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_title" ... >  to the <head>
   */
-  private setCitationTitleTag(): void {
+  protected setCitationTitleTag(): void {
    const value = this.getMetaTagValue('dc.title');
    this.addMetaTag('citation_title', value);
  }
@@ -213,7 +209,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_author" ... >  to the <head>
   */
-  private setCitationAuthorTags(): void {
+  protected setCitationAuthorTags(): void {
    const values: string[] = this.getMetaTagValues(['dc.author', 'dc.contributor.author', 'dc.creator']);
    this.addMetaTags('citation_author', values);
  }
@@ -221,7 +217,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_publication_date" ... >  to the <head>
   */
-  private setCitationPublicationDateTag(): void {
+  protected setCitationPublicationDateTag(): void {
    const value = this.getFirstMetaTagValue(['dc.date.copyright', 'dc.date.issued', 'dc.date.available', 'dc.date.accessioned']);
    this.addMetaTag('citation_publication_date', value);
  }
@@ -229,7 +225,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_issn" ... >  to the <head>
   */
-  private setCitationISSNTag(): void {
+  protected setCitationISSNTag(): void {
    const value = this.getMetaTagValue('dc.identifier.issn');
    this.addMetaTag('citation_issn', value);
  }
@@ -237,7 +233,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_isbn" ... >  to the <head>
   */
-  private setCitationISBNTag(): void {
+  protected setCitationISBNTag(): void {
    const value = this.getMetaTagValue('dc.identifier.isbn');
    this.addMetaTag('citation_isbn', value);
  }
@@ -245,7 +241,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_language" ... >  to the <head>
   */
-  private setCitationLanguageTag(): void {
+  protected setCitationLanguageTag(): void {
    const value = this.getFirstMetaTagValue(['dc.language', 'dc.language.iso']);
    this.addMetaTag('citation_language', value);
  }
@@ -253,7 +249,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_dissertation_name" ... >  to the <head>
   */
-  private setCitationDissertationNameTag(): void {
+  protected setCitationDissertationNameTag(): void {
    const value = this.getMetaTagValue('dc.title');
    this.addMetaTag('citation_dissertation_name', value);
  }
@@ -261,7 +257,7 @@ export class MetadataService {
  /**
   * Add dc.publisher to the <head>. The tag name depends on the item type.
   */
-  private setCitationPublisherTag(): void {
+  protected setCitationPublisherTag(): void {
    const value = this.getMetaTagValue('dc.publisher');
    if (this.isDissertation()) {
      this.addMetaTag('citation_dissertation_institution', value);
@@ -275,7 +271,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_keywords" ... >  to the <head>
   */
-  private setCitationKeywordsTag(): void {
+  protected setCitationKeywordsTag(): void {
    const value = this.getMetaTagValuesAndCombine('dc.subject');
    this.addMetaTag('citation_keywords', value);
  }
@@ -283,7 +279,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_abstract_html_url" ... >  to the <head>
   */
-  private setCitationAbstractUrlTag(): void {
+  protected setCitationAbstractUrlTag(): void {
    if (this.currentObject.value instanceof Item) {
      let url = this.getMetaTagValue('dc.identifier.uri');
      if (hasNoValue(url)) {
@@ -296,7 +292,7 @@ export class MetadataService {
  /**
   * Add <meta name="citation_pdf_url" ... >  to the <head>
   */
-  private setCitationPdfUrlTag(): void {
+  protected setCitationPdfUrlTag(): void {
    if (this.currentObject.value instanceof Item) {
      const item = this.currentObject.value as Item;

@@ -389,7 +385,7 @@ export class MetadataService {
   * @param bitstreamRd
   * @private
   */
-  private getFirstAllowedFormatBitstreamLink(bitstreamRd: RemoteData<PaginatedList<Bitstream>>): Observable<string> {
+  protected getFirstAllowedFormatBitstreamLink(bitstreamRd: RemoteData<PaginatedList<Bitstream>>): Observable<string> {
    if (hasValue(bitstreamRd.payload) && isNotEmpty(bitstreamRd.payload.page)) {
      // Retrieve the formats of all bitstreams in the page sequentially
      return observableConcat(
@@ -422,13 +418,13 @@ export class MetadataService {
  /**
   * Add <meta name="Generator" ... >  to the <head> containing the current DSpace version
   */
-  private setGenerator(): void {
+  protected setGenerator(): void {
    this.rootService.findRoot().pipe(getFirstSucceededRemoteDataPayload()).subscribe((root) => {
      this.meta.addTag({ name: 'Generator', content: root.dspaceVersion });
    });
  }

-  private hasType(value: string): boolean {
+  protected hasType(value: string): boolean {
    return this.currentObject.value.hasMetadata('dc.type', { value: value, ignoreCase: true });
  }

@@ -438,7 +434,7 @@ export class MetadataService {
   * @returns {boolean}
   *      true if this._item has a dc.type equal to 'Thesis'
   */
-  private isDissertation(): boolean {
+  protected isDissertation(): boolean {
    return this.hasType('thesis');
  }

@@ -448,27 +444,27 @@ export class MetadataService {
   * @returns {boolean}
   *      true if this._item has a dc.type equal to 'Technical Report'
   */
-  private isTechReport(): boolean {
+  protected isTechReport(): boolean {
    return this.hasType('technical report');
  }

-  private getMetaTagValue(key: string): string {
+  protected getMetaTagValue(key: string): string {
    return this.currentObject.value.firstMetadataValue(key);
  }

-  private getFirstMetaTagValue(keys: string[]): string {
+  protected getFirstMetaTagValue(keys: string[]): string {
    return this.currentObject.value.firstMetadataValue(keys);
  }

-  private getMetaTagValuesAndCombine(key: string): string {
+  protected getMetaTagValuesAndCombine(key: string): string {
    return this.getMetaTagValues([key]).join('; ');
  }

-  private getMetaTagValues(keys: string[]): string[] {
+  protected getMetaTagValues(keys: string[]): string[] {
    return this.currentObject.value.allMetadataValues(keys);
  }

-  private addMetaTag(name: string, content: string): void {
+  protected addMetaTag(name: string, content: string): void {
    if (content) {
      const tag = { name, content } as MetaDefinition;
      this.meta.addTag(tag);
@@ -476,17 +472,17 @@ export class MetadataService {
    }
  }

-  private addMetaTags(name: string, content: string[]): void {
+  protected addMetaTags(name: string, content: string[]): void {
    for (const value of content) {
      this.addMetaTag(name, value);
    }
  }

-  private storeTag(key: string): void {
+  protected storeTag(key: string): void {
    this.store.dispatch(new AddMetaTagAction(key));
  }

-  public clearMetaTags() {
+  protected clearMetaTags(): void {
    this.store.pipe(
      select(tagsInUseSelector),
      take(1)
--- a/src/app/init.service.spec.ts
+++ b/src/app/init.service.spec.ts
@@ -2,7 +2,7 @@ import { InitService } from './init.service';
 import { APP_CONFIG } from 'src/config/app-config.interface';
 import { APP_INITIALIZER, Injectable } from '@angular/core';
 import { inject, TestBed, waitForAsync } from '@angular/core/testing';
-import { MetadataService } from './core/metadata/metadata.service';
+import { HeadTagService } from './core/metadata/head-tag.service';
 import { BreadcrumbsService } from './breadcrumbs/breadcrumbs.service';
 import { CommonModule } from '@angular/common';
 import { Store, StoreModule } from '@ngrx/store';
@@ -31,6 +31,7 @@ import objectContaining = jasmine.objectContaining;
 import createSpyObj = jasmine.createSpyObj;
 import SpyObj = jasmine.SpyObj;
 import { getTestScheduler } from 'jasmine-marbles';
+import { HeadTagServiceMock } from './shared/mocks/head-tag-service.mock';

 let spy: SpyObj<any>;

@@ -121,7 +122,7 @@ describe('InitService', () => {
    let correlationIdServiceSpy;
    let dspaceTransferStateSpy;
    let transferStateSpy;
-    let metadataServiceSpy;
+    let headTagService: HeadTagServiceMock;
    let breadcrumbsServiceSpy;
    let menuServiceSpy;

@@ -147,9 +148,7 @@ describe('InitService', () => {
      breadcrumbsServiceSpy = jasmine.createSpyObj('breadcrumbsServiceSpy', [
        'listenForRouteChanges',
      ]);
-      metadataServiceSpy = jasmine.createSpyObj('metadataService', [
-        'listenForRouteChange',
-      ]);
+      headTagService = new HeadTagServiceMock();
      menuServiceSpy = jasmine.createSpyObj('menuServiceSpy', [
        'listenForRouteChanges',
      ]);
@@ -173,7 +172,7 @@ describe('InitService', () => {
          { provide: APP_CONFIG, useValue: environment },
          { provide: LocaleService, useValue: getMockLocaleService() },
          { provide: Angulartics2DSpace, useValue: new AngularticsProviderMock() },
-          { provide: MetadataService, useValue: metadataServiceSpy },
+          { provide: HeadTagService, useValue: headTagService },
          { provide: BreadcrumbsService, useValue: breadcrumbsServiceSpy },
          { provide: AuthService, useValue: new AuthServiceMock() },
          { provide: Router, useValue: new RouterMock() },
@@ -189,9 +188,9 @@ describe('InitService', () => {

    describe('initRouteListeners', () => {
      it('should call listenForRouteChanges', inject([InitService], (service) => {
-        // @ts-ignore
+        spyOn(headTagService, 'listenForRouteChange');
        service.initRouteListeners();
-        expect(metadataServiceSpy.listenForRouteChange).toHaveBeenCalledTimes(1);
+        expect(headTagService.listenForRouteChange).toHaveBeenCalledTimes(1);
        expect(breadcrumbsServiceSpy.listenForRouteChanges).toHaveBeenCalledTimes(1);
        expect(breadcrumbsServiceSpy.listenForRouteChanges).toHaveBeenCalledTimes(1);
      }));
--- a/src/app/init.service.ts
+++ b/src/app/init.service.ts
@@ -17,7 +17,7 @@ import isEqual from 'lodash/isEqual';
 import { TranslateService } from '@ngx-translate/core';
 import { LocaleService } from './core/locale/locale.service';
 import { Angulartics2DSpace } from './statistics/angulartics/dspace-provider';
-import { MetadataService } from './core/metadata/metadata.service';
+import { HeadTagService } from './core/metadata/head-tag.service';
 import { BreadcrumbsService } from './breadcrumbs/breadcrumbs.service';
 import { ThemeService } from './shared/theme-support/theme.service';
 import { isAuthenticationBlocking } from './core/auth/selectors';
@@ -49,7 +49,7 @@ export abstract class InitService {
    protected translate: TranslateService,
    protected localeService: LocaleService,
    protected angulartics2DSpace: Angulartics2DSpace,
-    protected metadata: MetadataService,
+    protected headTagService: HeadTagService,
    protected breadcrumbsService: BreadcrumbsService,
    protected themeService: ThemeService,
    protected menuService: MenuService,
@@ -178,13 +178,13 @@ export abstract class InitService {

  /**
   * Start route-listening subscriptions
-   * - {@link MetadataService.listenForRouteChange}
+   * - {@link HeadTagService.listenForRouteChange}
   * - {@link BreadcrumbsService.listenForRouteChanges}
   * - {@link ThemeService.listenForRouteChanges}
   * @protected
   */
  protected initRouteListeners(): void {
-    this.metadata.listenForRouteChange();
+    this.headTagService.listenForRouteChange();
    this.breadcrumbsService.listenForRouteChanges();
    this.themeService.listenForRouteChanges();
    this.menuService.listenForRouteChanges();
--- a/src/app/item-page/full/full-item-page.component.spec.ts
+++ b/src/app/item-page/full/full-item-page.component.spec.ts
@@ -5,7 +5,7 @@ import { TranslateLoaderMock } from '../../shared/mocks/translate-loader.mock';
 import { ChangeDetectionStrategy, NO_ERRORS_SCHEMA, PLATFORM_ID } from '@angular/core';
 import { TruncatePipe } from '../../shared/utils/truncate.pipe';
 import { FullItemPageComponent } from './full-item-page.component';
-import { MetadataService } from '../../core/metadata/metadata.service';
+import { HeadTagService } from '../../core/metadata/head-tag.service';
 import { ActivatedRoute } from '@angular/router';
 import { ActivatedRouteStub } from '../../shared/testing/active-router.stub';
 import { VarDirective } from '../../shared/utils/var.directive';
@@ -116,7 +116,7 @@ describe('FullItemPageComponent', () => {
      providers: [
        { provide: ActivatedRoute, useValue: routeStub },
        { provide: ItemDataService, useValue: {} },
-        { provide: MetadataService, useValue: metadataServiceStub },
+        { provide: HeadTagService, useValue: metadataServiceStub },
        { provide: AuthService, useValue: authService },
        { provide: AuthorizationDataService, useValue: authorizationDataService },
        { provide: ServerResponseService, useValue: serverResponseService },
--- a/src/app/item-page/simple/item-page.component.spec.ts
+++ b/src/app/item-page/simple/item-page.component.spec.ts
@@ -6,7 +6,6 @@ import { ChangeDetectionStrategy, NO_ERRORS_SCHEMA, PLATFORM_ID } from '@angular
 import { ItemPageComponent } from './item-page.component';
 import { ActivatedRoute, Router } from '@angular/router';
 import { ActivatedRouteStub } from '../../shared/testing/active-router.stub';
-import { MetadataService } from '../../core/metadata/metadata.service';
 import { VarDirective } from '../../shared/utils/var.directive';
 import { Item } from '../../core/shared/item.model';
 import { BrowserAnimationsModule } from '@angular/platform-browser/animations';
@@ -63,12 +62,6 @@ describe('ItemPageComponent', () => {
  let signpostingDataService: jasmine.SpyObj<SignpostingDataService>;
  let linkHeadService: jasmine.SpyObj<LinkHeadService>;

-  const mockMetadataService = {
-    /* eslint-disable no-empty,@typescript-eslint/no-empty-function */
-    processRemoteData: () => {
-    }
-    /* eslint-enable no-empty, @typescript-eslint/no-empty-function */
-  };
  const mockRoute = Object.assign(new ActivatedRouteStub(), {
    data: observableOf({ dso: createSuccessfulRemoteDataObject(mockItem) })
  });
@@ -105,7 +98,6 @@ describe('ItemPageComponent', () => {
      providers: [
        { provide: ActivatedRoute, useValue: mockRoute },
        { provide: ItemDataService, useValue: {} },
-        { provide: MetadataService, useValue: mockMetadataService },
        { provide: Router, useValue: {} },
        { provide: AuthService, useValue: authService },
        { provide: AuthorizationDataService, useValue: authorizationDataService },
--- a/src/app/root/root.component.spec.ts
+++ b/src/app/root/root.component.spec.ts
@@ -1,29 +1,14 @@
 import { ComponentFixture, TestBed } from '@angular/core/testing';
 import { RootComponent } from './root.component';
 import { CommonModule } from '@angular/common';
-import { StoreModule } from '@ngrx/store';
-import { authReducer } from '../core/auth/auth.reducer';
-import { storeModuleConfig } from '../app.reducer';
-import { TranslateLoader, TranslateModule } from '@ngx-translate/core';
-import { TranslateLoaderMock } from '../shared/mocks/translate-loader.mock';
-import { NativeWindowRef, NativeWindowService } from '../core/services/window.service';
-import { MetadataService } from '../core/metadata/metadata.service';
-import { MetadataServiceMock } from '../shared/mocks/metadata-service.mock';
-import { AngularticsProviderMock } from '../shared/mocks/angulartics-provider.service.mock';
-import { Angulartics2DSpace } from '../statistics/angulartics/dspace-provider';
-import { AuthService } from '../core/auth/auth.service';
-import { AuthServiceMock } from '../shared/mocks/auth.service.mock';
-import { ActivatedRoute, Router } from '@angular/router';
+import { TranslateModule } from '@ngx-translate/core';
+import { Router } from '@angular/router';
 import { RouterMock } from '../shared/mocks/router.mock';
-import { MockActivatedRoute } from '../shared/mocks/active-router.mock';
 import { MenuService } from '../shared/menu/menu.service';
 import { CSSVariableService } from '../shared/sass-helper/css-variable.service';
 import { CSSVariableServiceStub } from '../shared/testing/css-variable-service.stub';
 import { HostWindowService } from '../shared/host-window.service';
 import { HostWindowServiceStub } from '../shared/testing/host-window-service.stub';
-import { LocaleService } from '../core/locale/locale.service';
-import { provideMockStore } from '@ngrx/store/testing';
-import { RouteService } from '../core/services/route.service';
 import { CUSTOM_ELEMENTS_SCHEMA } from '@angular/core';
 import { MenuServiceStub } from '../shared/testing/menu-service.stub';
 import { NoopAnimationsModule } from '@angular/platform-browser/animations';
@@ -37,29 +22,14 @@ describe('RootComponent', () => {
      imports: [
        CommonModule,
        NoopAnimationsModule,
-        StoreModule.forRoot(authReducer, storeModuleConfig),
-        TranslateModule.forRoot({
-          loader: {
-            provide: TranslateLoader,
-            useClass: TranslateLoaderMock
-          }
-        }),
+        TranslateModule.forRoot(),
      ],
      declarations: [RootComponent], // declare the test component
      providers: [
-        { provide: NativeWindowService, useValue: new NativeWindowRef() },
-        { provide: MetadataService, useValue: new MetadataServiceMock() },
-        { provide: Angulartics2DSpace, useValue: new AngularticsProviderMock() },
-        { provide: AuthService, useValue: new AuthServiceMock() },
        { provide: Router, useValue: new RouterMock() },
-        { provide: ActivatedRoute, useValue: new MockActivatedRoute() },
        { provide: MenuService, useValue: new MenuServiceStub() },
        { provide: CSSVariableService, useClass: CSSVariableServiceStub },
        { provide: HostWindowService, useValue: new HostWindowServiceStub(800) },
-        { provide: LocaleService, useValue: {} },
-        provideMockStore({ core: { auth: { loading: false } } } as any),
-        RootComponent,
-        RouteService
      ],
      schemas: [CUSTOM_ELEMENTS_SCHEMA]
    }).compileComponents();
--- a/src/app/root/root.component.ts
+++ b/src/app/root/root.component.ts
@@ -1,20 +1,12 @@
 import { map, startWith } from 'rxjs/operators';
-import { Component, Inject, Input, OnInit } from '@angular/core';
+import { Component, Input, OnInit } from '@angular/core';
 import { Router } from '@angular/router';

 import { combineLatest as combineLatestObservable, Observable, of } from 'rxjs';
-import { Store } from '@ngrx/store';
-import { TranslateService } from '@ngx-translate/core';
-
-import { MetadataService } from '../core/metadata/metadata.service';
-import { HostWindowState } from '../shared/search/host-window.reducer';
-import { NativeWindowRef, NativeWindowService } from '../core/services/window.service';
-import { AuthService } from '../core/auth/auth.service';
 import { CSSVariableService } from '../shared/sass-helper/css-variable.service';
 import { MenuService } from '../shared/menu/menu.service';
 import { HostWindowService } from '../shared/host-window.service';
 import { ThemeConfig } from '../../config/theme.model';
-import { Angulartics2DSpace } from '../statistics/angulartics/dspace-provider';
 import { environment } from '../../environments/environment';
 import { slideSidebarPadding } from '../shared/animations/slide';
 import { MenuID } from '../shared/menu/menu-id.model';
@@ -47,12 +39,6 @@ export class RootComponent implements OnInit {
  @Input() shouldShowRouteLoader: boolean;

  constructor(
-    @Inject(NativeWindowService) private _window: NativeWindowRef,
-    private translate: TranslateService,
-    private store: Store<HostWindowState>,
-    private metadata: MetadataService,
-    private angulartics2DSpace: Angulartics2DSpace,
-    private authService: AuthService,
    private router: Router,
    private cssService: CSSVariableService,
    private menuService: MenuService,
--- a/src/app/shared/mocks/head-tag-service.mock.ts
+++ b/src/app/shared/mocks/head-tag-service.mock.ts
@@ -1,5 +1,5 @@

-export class MetadataServiceMock {
+export class HeadTagServiceMock {

  // eslint-disable-next-line no-empty, @typescript-eslint/no-empty-function
  public listenForRouteChange(): void {
--- a/src/modules/app/browser-init.service.ts
+++ b/src/modules/app/browser-init.service.ts
@@ -19,7 +19,7 @@ import { TranslateService } from '@ngx-translate/core';
 import { LocaleService } from '../../app/core/locale/locale.service';
 import { Angulartics2DSpace } from '../../app/statistics/angulartics/dspace-provider';
 import { GoogleAnalyticsService } from '../../app/statistics/google-analytics.service';
-import { MetadataService } from '../../app/core/metadata/metadata.service';
+import { HeadTagService } from '../../app/core/metadata/head-tag.service';
 import { BreadcrumbsService } from '../../app/breadcrumbs/breadcrumbs.service';
 import { KlaroService } from '../../app/shared/cookies/klaro.service';
 import { AuthService } from '../../app/core/auth/auth.service';
@@ -50,7 +50,7 @@ export class BrowserInitService extends InitService {
    protected localeService: LocaleService,
    protected angulartics2DSpace: Angulartics2DSpace,
    protected googleAnalyticsService: GoogleAnalyticsService,
-    protected metadata: MetadataService,
+    protected headTagService: HeadTagService,
    protected breadcrumbsService: BreadcrumbsService,
    protected klaroService: KlaroService,
    protected authService: AuthService,
@@ -65,7 +65,7 @@ export class BrowserInitService extends InitService {
      translate,
      localeService,
      angulartics2DSpace,
-      metadata,
+      headTagService,
      breadcrumbsService,
      themeService,
      menuService,
--- a/src/modules/app/server-init.service.ts
+++ b/src/modules/app/server-init.service.ts
@@ -16,7 +16,7 @@ import { Inject, Injectable } from '@angular/core';
 import { TranslateService } from '@ngx-translate/core';
 import { LocaleService } from '../../app/core/locale/locale.service';
 import { Angulartics2DSpace } from '../../app/statistics/angulartics/dspace-provider';
-import { MetadataService } from '../../app/core/metadata/metadata.service';
+import { HeadTagService } from '../../app/core/metadata/head-tag.service';
 import { BreadcrumbsService } from '../../app/breadcrumbs/breadcrumbs.service';
 import { ThemeService } from '../../app/shared/theme-support/theme.service';
 import { take } from 'rxjs/operators';
@@ -35,7 +35,7 @@ export class ServerInitService extends InitService {
    protected translate: TranslateService,
    protected localeService: LocaleService,
    protected angulartics2DSpace: Angulartics2DSpace,
-    protected metadata: MetadataService,
+    protected headTagService: HeadTagService,
    protected breadcrumbsService: BreadcrumbsService,
    protected themeService: ThemeService,
    protected menuService: MenuService
@@ -47,7 +47,7 @@ export class ServerInitService extends InitService {
      translate,
      localeService,
      angulartics2DSpace,
-      metadata,
+      headTagService,
      breadcrumbsService,
      themeService,
      menuService,