Merge branch 'add-referrer-to-pageview-event-7.0' into add-referrer-to-pageview-event-7.2

src/app/core/services/browser.referrer.service.spec.ts

@@ -0,0 +1,53 @@
+import { of as observableOf } from 'rxjs';
+import { RouteService } from './route.service';
+import { BrowserReferrerService } from './browser.referrer.service';
+
+describe(`BrowserReferrerService`, () => {
+  let service: BrowserReferrerService;
+  const documentReferrer = 'https://www.referrer.com';
+  const origin = 'https://www.dspace.org';
+  let routeService: RouteService;
+
+  beforeEach(() => {
+    routeService = {
+      getPreviousUrl: () => observableOf('')
+    } as any;
+    service = new BrowserReferrerService(
+      { referrer: documentReferrer },
+      routeService,
+      { getCurrentOrigin: () => origin } as any
+    );
+  });
+
+  describe(`getReferrer`, () => {
+    let prevUrl: string;
+
+    describe(`when getPreviousUrl is an empty string`, () => {
+      beforeEach(() => {
+        prevUrl = '';
+        spyOn(routeService, 'getPreviousUrl').and.returnValue(observableOf(prevUrl));
+      });
+
+      it(`should return document.referrer`, (done: DoneFn) => {
+        service.getReferrer().subscribe((emittedReferrer: string) => {
+          expect(emittedReferrer).toBe(documentReferrer);
+          done();
+        });
+      });
+    });
+
+    describe(`when getPreviousUrl is not empty`, () => {
+      beforeEach(() => {
+        prevUrl = '/some/local/route';
+        spyOn(routeService, 'getPreviousUrl').and.returnValue(observableOf(prevUrl));
+      });
+
+      it(`should return the value emitted by getPreviousUrl combined with the origin from HardRedirectService`, (done: DoneFn) => {
+        service.getReferrer().subscribe((emittedReferrer: string) => {
+          expect(emittedReferrer).toBe(origin + prevUrl);
+          done();
+        });
+      });
+    });
+  });
+});

src/app/core/services/browser.referrer.service.ts

@@ -0,0 +1,48 @@
+import { ReferrerService } from './referrer.service';
+import { Observable } from 'rxjs';
+import { map } from 'rxjs/operators';
+import { isEmpty } from '../../shared/empty.util';
+import { URLCombiner } from '../url-combiner/url-combiner';
+import { Inject, Injectable } from '@angular/core';
+import { DOCUMENT } from '@angular/common';
+import { HardRedirectService } from './hard-redirect.service';
+import { RouteService } from './route.service';
+
+/**
+ * A service to determine the referrer
+ *
+ * The browser implementation will get the referrer from document.referrer, in the event that the
+ * previous page visited was not an angular URL. If it was, the route history in the store must be
+ * used, since document.referrer doesn't get updated on route changes
+ */
+@Injectable()
+export class BrowserReferrerService extends ReferrerService {
+
+  constructor(
+    @Inject(DOCUMENT) protected document: any,
+    protected routeService: RouteService,
+    protected hardRedirectService: HardRedirectService,
+  ) {
+    super();
+  }
+
+  /**
+   * Return the referrer
+   *
+   * Return the referrer URL based on the route history in the store. If there is no route history
+   * in the store yet, document.referrer will be used
+   */
+  public getReferrer(): Observable<string> {
+    return this.routeService.getPreviousUrl().pipe(
+      map((prevUrl: string) => {
+        // if we don't have anything in the history yet, return document.referrer
+        // (note that that may be empty too, e.g. if you've just opened a new browser tab)
+        if (isEmpty(prevUrl)) {
+          return this.document.referrer;
+        } else {
+          return new URLCombiner(this.hardRedirectService.getCurrentOrigin(), prevUrl).toString();
+        }
+      })
+    );
+  }
+}

src/app/core/services/referrer.service.ts

@@ -0,0 +1,15 @@
+import { Injectable } from '@angular/core';
+import { Observable } from 'rxjs';
+
+/**
+ * A service to determine the referrer, i.e. the previous URL that led the user to the current one
+ */
+@Injectable()
+export abstract class ReferrerService {
+
+  /**
+   * Return the referrer
+   */
+  abstract getReferrer(): Observable<string>;
+
+}

src/app/core/services/server.referrer.service.spec.ts

@@ -0,0 +1,34 @@
+import { ServerReferrerService } from './server.referrer.service';
+
+describe(`ServerReferrerService`, () => {
+  let service: ServerReferrerService;
+  const referrer = 'https://www.referrer.com';
+
+  describe(`getReferrer`, () => {
+    describe(`when the referer header is set`, () => {
+      beforeEach(() => {
+        service = new ServerReferrerService({ headers: { referer: referrer }});
+      });
+
+      it(`should return the referer header`, (done: DoneFn) => {
+        service.getReferrer().subscribe((emittedReferrer: string) => {
+          expect(emittedReferrer).toBe(referrer);
+          done();
+        });
+      });
+    });
+
+    describe(`when the referer header is not set`, () => {
+      beforeEach(() => {
+        service = new ServerReferrerService({ headers: {}});
+      });
+
+      it(`should return an empty string`, (done: DoneFn) => {
+        service.getReferrer().subscribe((emittedReferrer: string) => {
+          expect(emittedReferrer).toBe('');
+          done();
+        });
+      });
+    });
+  });
+});

src/app/core/services/server.referrer.service.ts

@@ -0,0 +1,31 @@
+import { ReferrerService } from './referrer.service';
+import { Observable, of as observableOf } from 'rxjs';
+import { Inject, Injectable } from '@angular/core';
+import { REQUEST } from '@nguniversal/express-engine/tokens';
+
+/**
+ * A service to determine the referrer
+ *
+ * The server implementation will get the referrer from the 'Referer' header of the request sent to
+ * the express server
+ */
+@Injectable()
+export class ServerReferrerService extends ReferrerService {
+
+  constructor(
+    @Inject(REQUEST) protected request: any,
+  ) {
+    super();
+  }
+
+  /**
+   * Return the referrer
+   *
+   * Return the 'Referer' header from the request, or an empty string if the header wasn't set
+   * (for consistency with the document.referrer property on the browser side)
+   */
+  public getReferrer(): Observable<string> {
+    const referrer = this.request.headers.referer || '';
+    return observableOf(referrer);
+  }
+}

src/app/entity-groups/journal-entities/item-grid-elements/search-result-grid-elements/journal-issue/journal-issue-search-result-grid-element.component.html

@@ -5,7 +5,7 @@
     </div>
     <a *ngIf="linkType != linkTypes.None"
        [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-       rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+       [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
        class="card-img-top full-width">
       <div>
         <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -36,7 +36,7 @@
       </p>
       <div *ngIf="linkType != linkTypes.None" class="text-center">
         <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-           rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+           [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
            class="lead btn btn-primary viewButton">View</a>
       </div>
     </div>

src/app/entity-groups/journal-entities/item-grid-elements/search-result-grid-elements/journal-volume/journal-volume-search-result-grid-element.component.html

@@ -5,7 +5,7 @@
     </div>
     <a *ngIf="linkType != linkTypes.None"
        [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-       rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+       [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
        class="card-img-top full-width">
       <div>
         <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -36,7 +36,7 @@
       </p>
       <div *ngIf="linkType != linkTypes.None" class="text-center">
         <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-           rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+           [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
            class="lead btn btn-primary viewButton">View</a>
       </div>
     </div>

src/app/entity-groups/journal-entities/item-grid-elements/search-result-grid-elements/journal/journal-search-result-grid-element.component.html

@@ -5,7 +5,7 @@
     </div>
     <a *ngIf="linkType != linkTypes.None"
        [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-       rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+       [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
        class="card-img-top full-width">
       <div>
         <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -40,7 +40,7 @@
       </p>
       <div *ngIf="linkType != linkTypes.None" class="text-center">
         <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-           rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+           [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
            class="lead btn btn-primary viewButton">View</a>
       </div>
     </div>

src/app/entity-groups/journal-entities/item-list-elements/search-result-list-elements/journal-issue/journal-issue-search-result-list-element.component.html

@@ -1,6 +1,6 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
 <ds-truncatable [id]="dso.id">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
             [routerLink]="[itemPageRoute]" class="lead item-list-title dont-break-out"
             [innerHTML]="dsoTitle"></a>
     <span *ngIf="linkType == linkTypes.None"

src/app/entity-groups/journal-entities/item-list-elements/search-result-list-elements/journal-volume/journal-volume-search-result-list-element.component.html

@@ -1,6 +1,6 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
 <ds-truncatable [id]="dso.id">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
             [routerLink]="[itemPageRoute]" class="lead item-list-title dont-break-out"
             [innerHTML]="dsoTitle"></a>
     <span *ngIf="linkType == linkTypes.None"

src/app/entity-groups/journal-entities/item-list-elements/search-result-list-elements/journal/journal-search-result-list-element.component.html

@@ -1,6 +1,6 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
 <ds-truncatable [id]="dso.id">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
             [routerLink]="[itemPageRoute]" class="lead item-list-title dont-break-out"
             [innerHTML]="dsoTitle"></a>
     <span *ngIf="linkType == linkTypes.None"

src/app/entity-groups/research-entities/item-grid-elements/search-result-grid-elements/org-unit/org-unit-search-result-grid-element.component.html

@@ -5,7 +5,7 @@
     </div>
     <a *ngIf="linkType != linkTypes.None"
        [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-       rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+       [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
        class="card-img-top full-width">
       <div>
         <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -42,7 +42,7 @@
       </p>
       <div *ngIf="linkType != linkTypes.None" class="text-center">
         <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-           rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+           [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
            class="lead btn btn-primary viewButton">View</a>
       </div>
     </div>

src/app/entity-groups/research-entities/item-grid-elements/search-result-grid-elements/person/person-search-result-grid-element.component.html

@@ -5,7 +5,7 @@
     </div>
     <a *ngIf="linkType != linkTypes.None"
        [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-       rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+       [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
        class="card-img-top full-width">
       <div>
         <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -36,7 +36,7 @@
       </p>
       <div *ngIf="linkType != linkTypes.None" class="text-center">
         <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-           rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+           [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
            class="lead btn btn-primary viewButton">View</a>
       </div>
     </div>

src/app/entity-groups/research-entities/item-grid-elements/search-result-grid-elements/project/project-search-result-grid-element.component.html

@@ -5,7 +5,7 @@
     </div>
     <a *ngIf="linkType != linkTypes.None"
        [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-       rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+       [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
        class="card-img-top full-width">
       <div>
         <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -30,7 +30,7 @@
       </p>
       <div *ngIf="linkType != linkTypes.None" class="text-center">
         <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'"
-           rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+           [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
            class="lead btn btn-primary viewButton">View</a>
       </div>
     </div>

src/app/entity-groups/research-entities/item-list-elements/search-result-list-elements/org-unit/org-unit-search-result-list-element.component.html

@@ -1,6 +1,6 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
 <ds-truncatable [id]="dso.id">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
        [routerLink]="[itemPageRoute]" class="lead"
        [innerHTML]="firstMetadataValue('organization.legalName')"></a>
     <span *ngIf="linkType == linkTypes.None"

src/app/entity-groups/research-entities/item-list-elements/search-result-list-elements/person/person-search-result-list-element.component.html

@@ -1,6 +1,6 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
 <ds-truncatable [id]="dso.id">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
        [routerLink]="[itemPageRoute]" class="lead"
        [innerHTML]="name"></a>
     <span *ngIf="linkType == linkTypes.None"

src/app/entity-groups/research-entities/item-list-elements/search-result-list-elements/project/project-search-result-list-element.component.html

@@ -1,6 +1,6 @@
 <ds-truncatable [id]="dso.id">
     <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
        [routerLink]="[itemPageRoute]" class="lead item-list-title dont-break-out"
        [innerHTML]="dsoTitle"></a>
     <span *ngIf="linkType == linkTypes.None"

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

@@ -1,5 +1,5 @@
 <div class="card">
-  <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/collections/', object.id]" class="card-img-top">
+  <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/collections/', object.id]" class="card-img-top">
     <ds-thumbnail [thumbnail]="(object.logo | async)?.payload" [limitWidth]="false">
     </ds-thumbnail>
   </a>
@@ -11,7 +11,7 @@
     <h4 class="card-title">{{object.name}}</h4>
     <p *ngIf="object.shortDescription" class="card-text">{{object.shortDescription}}</p>
     <div *ngIf="linkType != linkTypes.None" class="text-center">
-      <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/collections/', object.id]" class="lead btn btn-primary viewButton">View</a>
+      <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/collections/', object.id]" class="lead btn btn-primary viewButton">View</a>
     </div>
   </div>
 </div>

src/app/shared/object-grid/community-grid-element/community-grid-element.component.html

@@ -1,5 +1,5 @@
 <div class="card">
-  <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/communities/', object.id]" class="card-img-top">
+  <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/communities/', object.id]" class="card-img-top">
     <ds-thumbnail [thumbnail]="(object.logo | async)?.payload" [limitWidth]="false">
     </ds-thumbnail>
   </a>
@@ -11,7 +11,7 @@
     <h4 class="card-title">{{object.name}}</h4>
     <p *ngIf="object.shortDescription" class="card-text">{{object.shortDescription}}</p>
     <div *ngIf="linkType != linkTypes.None" class="text-center">
-      <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/communities/', object.id]" class="lead btn btn-primary viewButton">View</a>
+      <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/communities/', object.id]" class="lead btn btn-primary viewButton">View</a>
     </div>
   </div>
 </div>

src/app/shared/object-grid/search-result-grid-element/collection-search-result/collection-search-result-grid-element.component.html

@@ -1,5 +1,5 @@
 <div class="card">
-  <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/collections/', dso.id]" class="card-img-top">
+  <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/collections/', dso.id]" class="card-img-top">
     <ds-thumbnail [thumbnail]="(dso.logo | async)?.payload" [limitWidth]="false">
     </ds-thumbnail>
   </a>
@@ -12,7 +12,7 @@
     <h4 class="card-title">{{dso.name}}</h4>
     <p *ngIf="dso.shortDescription" class="card-text">{{dso.shortDescription}}</p>
     <div *ngIf="linkType != linkTypes.None" class="text-center">
-      <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/collections/',  dso.id]" class="lead btn btn-primary viewButton">View</a>
+      <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/collections/',  dso.id]" class="lead btn btn-primary viewButton">View</a>
     </div>
   </div>
   <ng-content></ng-content>

src/app/shared/object-grid/search-result-grid-element/community-search-result/community-search-result-grid-element.component.html

@@ -1,5 +1,5 @@
 <div class="card">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/communities/', dso.id]" class="card-img-top">
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/communities/', dso.id]" class="card-img-top">
         <ds-thumbnail [thumbnail]="(dso.logo | async)?.payload" [limitWidth]="false">
         </ds-thumbnail>
     </a>
@@ -12,7 +12,7 @@
         <h4 class="card-title">{{dso.name}}</h4>
         <p *ngIf="dso.shortDescription" class="card-text">{{dso.shortDescription}}</p>
         <div *ngIf="linkType != linkTypes.None" class="text-center">
-            <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/communities/', dso.id]" class="lead btn btn-primary viewButton">View</a>
+            <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/communities/', dso.id]" class="lead btn btn-primary viewButton">View</a>
         </div>
     </div>
     <ng-content></ng-content>

src/app/shared/object-grid/search-result-grid-element/item-search-result/item/item-search-result-grid-element.component.html

@@ -3,7 +3,7 @@
       <div class="position-absolute ml-1">
         <ng-content></ng-content>
       </div>
-      <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+      <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
          class="card-img-top full-width">
           <div>
               <ds-thumbnail [thumbnail]="dso?.thumbnail | async" [limitWidth]="false">
@@ -36,7 +36,7 @@
               </ds-truncatable-part>
           </p>
           <div *ngIf="linkType != linkTypes.None" class="text-center">
-              <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="[itemPageRoute]"
+              <a [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="[itemPageRoute]"
                  class="lead btn btn-primary viewButton">View</a>
           </div>
       </div>

src/app/shared/object-list/browse-entry-list-element/browse-entry-list-element.component.html

@@ -1,5 +1,5 @@
 <div class="d-flex flex-row">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="" [queryParams]="getQueryParams()" [queryParamsHandling]="'merge'" class="lead">
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="" [queryParams]="getQueryParams()" [queryParamsHandling]="'merge'" class="lead">
         {{object.value}}
     </a>
     <span *ngIf="linkType == linkTypes.None" class="lead">

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

@@ -1,4 +1,4 @@
-<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/collections/' + object.id]" class="lead">
+<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/collections/' + object.id]" class="lead">
     {{object.name}}
 </a>
 <span *ngIf="linkType == linkTypes.None" class="lead">

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

@@ -1,4 +1,4 @@
-<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/communities/' + object.id]" class="lead">
+<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/communities/' + object.id]" class="lead">
     {{object.name}}
 </a>
 <span *ngIf="linkType == linkTypes.None" class="lead">

src/app/shared/object-list/search-result-list-element/collection-search-result/collection-search-result-list-element.component.html

@@ -1,4 +1,4 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
-<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer" [routerLink]="['/collections/' + dso.id]" class="lead" [innerHTML]="dsoTitle"></a>
+<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null" [routerLink]="['/collections/' + dso.id]" class="lead" [innerHTML]="dsoTitle"></a>
 <span *ngIf="linkType == linkTypes.None" class="lead" [innerHTML]="dsoTitle"></span>
 <div *ngIf="dso.shortDescription" class="text-muted abstract-text" [innerHTML]="firstMetadataValue('dc.description.abstract')"></div>

src/app/shared/object-list/search-result-list-element/community-search-result/community-search-result-list-element.component.html

@@ -1,4 +1,4 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
-<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"  [routerLink]="['/communities/' + dso.id]" class="lead" [innerHTML]="dsoTitle"></a>
+<a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"  [routerLink]="['/communities/' + dso.id]" class="lead" [innerHTML]="dsoTitle"></a>
 <span *ngIf="linkType == linkTypes.None" class="lead" [innerHTML]="dsoTitle"></span>
 <div *ngIf="dso.shortDescription" class="text-muted abstract-text" [innerHTML]="firstMetadataValue('dc.description.abstract')"></div>

src/app/shared/object-list/search-result-list-element/item-search-result/item-types/item/item-search-result-list-element.component.html

@@ -1,7 +1,7 @@
 <ds-type-badge *ngIf="showLabel" [object]="dso"></ds-type-badge>
 
 <ds-truncatable [id]="dso.id" *ngIf="object !== undefined && object !== null">
-    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" rel="noopener noreferrer"
+    <a *ngIf="linkType != linkTypes.None" [target]="(linkType == linkTypes.ExternalLink) ? '_blank' : '_self'" [attr.rel]="(linkType == linkTypes.ExternalLink) ? 'noopener' : null"
        [routerLink]="[itemPageRoute]" class="lead item-list-title dont-break-out"
        [innerHTML]="dsoTitle"></a>
     <span *ngIf="linkType == linkTypes.None" class="lead item-list-title dont-break-out"

src/app/statistics/angulartics/dspace-provider.spec.ts

@@ -11,7 +11,10 @@ describe('Angulartics2DSpace', () => {
 
   beforeEach(() => {
     angulartics2 = {
-      eventTrack: observableOf({action: 'pageView', properties: {object: 'mock-object'}}),
+      eventTrack: observableOf({action: 'pageView', properties: {
+        object: 'mock-object',
+        referrer: 'https://www.referrer.com'
+      }}),
       filterDeveloperMode: () => filter(() => true)
     } as any;
     statisticsService = jasmine.createSpyObj('statisticsService', {trackViewEvent: null});
@@ -20,7 +23,7 @@ describe('Angulartics2DSpace', () => {
 
   it('should use the statisticsService', () => {
     provider.startTracking();
-    expect(statisticsService.trackViewEvent).toHaveBeenCalledWith('mock-object' as any);
+    expect(statisticsService.trackViewEvent).toHaveBeenCalledWith('mock-object' as any, 'https://www.referrer.com');
   });
 
 });

src/app/statistics/angulartics/dspace-provider.ts

@@ -25,7 +25,7 @@ export class Angulartics2DSpace {
 
   private eventTrack(event) {
     if (event.action === 'pageView') {
-      this.statisticsService.trackViewEvent(event.properties.object);
+      this.statisticsService.trackViewEvent(event.properties.object, event.properties.referrer);
     } else if (event.action === 'search') {
       this.statisticsService.trackSearchEvent(
         event.properties.searchOptions,

src/app/statistics/angulartics/dspace/view-tracker.component.ts

@@ -1,6 +1,10 @@
-import { Component, Input, OnInit } from '@angular/core';
+import { Component, Input, OnInit, OnDestroy } from '@angular/core';
 import { Angulartics2 } from 'angulartics2';
 import { DSpaceObject } from '../../../core/shared/dspace-object.model';
+import { Subscription } from 'rxjs/internal/Subscription';
+import { take } from 'rxjs/operators';
+import { hasValue } from '../../../shared/empty.util';
+import { ReferrerService } from '../../../core/services/referrer.service';
 
 /**
  * This component triggers a page view statistic
@@ -10,18 +14,43 @@ import { DSpaceObject } from '../../../core/shared/dspace-object.model';
   styleUrls: ['./view-tracker.component.scss'],
   templateUrl: './view-tracker.component.html',
 })
-export class ViewTrackerComponent implements OnInit {
+export class ViewTrackerComponent implements OnInit, OnDestroy {
+  /**
+   * The DSpaceObject to track a view event about
+   */
   @Input() object: DSpaceObject;
 
+  /**
+   * The subscription on this.referrerService.getReferrer()
+   * @protected
+   */
+  protected sub: Subscription;
+
   constructor(
-    public angulartics2: Angulartics2
+    public angulartics2: Angulartics2,
+    public referrerService: ReferrerService
   ) {
   }
 
   ngOnInit(): void {
+    this.sub = this.referrerService.getReferrer()
+      .pipe(take(1))
+      .subscribe((referrer: string) => {
         this.angulartics2.eventTrack.next({
           action: 'pageView',
-      properties: {object: this.object},
+          properties: {
+            object: this.object,
+            referrer
+          },
+        });
       });
   }
+
+  ngOnDestroy(): void {
+    // unsubscribe in the case that this component is destroyed before
+    // this.referrerService.getReferrer() has emitted
+    if (hasValue(this.sub)) {
+      this.sub.unsubscribe();
+    }
+  }
 }

src/app/statistics/statistics.service.spec.ts

@@ -26,12 +26,13 @@ describe('StatisticsService', () => {
 
     it('should send a request to track an item view ', () => {
       const mockItem: any = {uuid: 'mock-item-uuid', type: 'item'};
-      service.trackViewEvent(mockItem);
+      service.trackViewEvent(mockItem, 'https://www.referrer.com');
       const request: TrackRequest = requestService.send.calls.mostRecent().args[0];
       expect(request.body).toBeDefined('request.body');
       const body = JSON.parse(request.body);
       expect(body.targetId).toBe('mock-item-uuid');
       expect(body.targetType).toBe('item');
+      expect(body.referrer).toBe('https://www.referrer.com');
     });
   });
 

src/app/statistics/statistics.service.ts

@@ -31,11 +31,16 @@ export class StatisticsService {
   /**
    * To track a page view
    * @param dso: The dso which was viewed
+   * @param referrer: The referrer used by the client to reach the dso page
    */
-  trackViewEvent(dso: DSpaceObject) {
+  trackViewEvent(
+    dso: DSpaceObject,
+    referrer: string
+  ) {
     this.sendEvent('/statistics/viewevents', {
       targetId: dso.uuid,
-      targetType: (dso as any).type
+      targetType: (dso as any).type,
+      referrer
     });
   }
 

src/app/submission/sections/cc-license/submission-section-cc-licenses.component.html

@@ -128,7 +128,7 @@
       <div>
         {{ 'submission.sections.ccLicense.link' | translate }}
       </div>
-      <a class="license-link" href="{{ licenseLink }}" target="_blank" rel="noopener noreferrer">
+      <a class="license-link" href="{{ licenseLink }}" target="_blank" rel="noopener">
         {{ licenseLink }}
       </a>
       <div class="m-2">

src/modules/app/browser-app.module.ts

@@ -37,6 +37,8 @@ import { AppConfig, APP_CONFIG_STATE } from '../../config/app-config.interface';
 import { DefaultAppConfig } from '../../config/default-app-config';
 import { extendEnvironmentWithAppConfig } from '../../config/config.util';
 import { CorrelationIdService } from '../../app/correlation-id/correlation-id.service';
+import { ReferrerService } from '../../app/core/services/referrer.service';
+import { BrowserReferrerService } from '../../app/core/services/browser.referrer.service';
 
 import { environment } from '../../environments/environment';
 
@@ -136,6 +138,10 @@ export function getRequest(transferState: TransferState): any {
       provide: AuthRequestService,
       useClass: BrowserAuthRequestService,
     },
+    {
+      provide: ReferrerService,
+      useClass: BrowserReferrerService,
+    },
     {
       provide: LocationToken,
       useFactory: locationProvider,

src/modules/app/server-app.module.ts

@@ -34,6 +34,8 @@ import { AuthRequestService } from '../../app/core/auth/auth-request.service';
 import { ServerAuthRequestService } from '../../app/core/auth/server-auth-request.service';
 import { CorrelationIdService } from '../../app/correlation-id/correlation-id.service';
 import { AppConfig, APP_CONFIG_STATE } from '../../config/app-config.interface';
+import { ReferrerService } from '../../app/core/services/referrer.service';
+import { ServerReferrerService } from '../../app/core/services/server.referrer.service';
 
 import { environment } from '../../environments/environment';
 
@@ -121,6 +123,10 @@ export function createTranslateLoader() {
       provide: HardRedirectService,
       useClass: ServerHardRedirectService,
     },
+    {
+      provide: ReferrerService,
+      useClass: ServerReferrerService,
+    },
   ]
 })
 export class ServerAppModule {