119602: Allow resetting accessibility settings

src/app/accessibility/accessibility-settings.service.ts

@@ -2,13 +2,14 @@ import { Injectable } from '@angular/core';
 import { Observable, of, switchMap } from 'rxjs';
 import { map, take } from 'rxjs/operators';
 import { CookieService } from '../core/services/cookie.service';
-import { hasValue, isNotEmpty, isNotEmptyOperator } from '../shared/empty.util';
+import { hasValue, isNotEmpty } from '../shared/empty.util';
 import { AuthService } from '../core/auth/auth.service';
 import { EPerson } from '../core/eperson/models/eperson.model';
 import { EPersonDataService } from '../core/eperson/eperson-data.service';
 import { getFirstCompletedRemoteData } from '../core/shared/operators';
 import cloneDeep from 'lodash/cloneDeep';
 import { environment } from '../../environments/environment';
+import { createSuccessfulRemoteDataObject$ } from '../shared/remote-data.utils';
 
 /**
  * Name of the cookie used to store the settings locally
@@ -198,8 +199,8 @@ export class AccessibilitySettingsService {
 
     return this.ePersonService.createPatchFromCache(user).pipe(
       take(1),
-      isNotEmptyOperator(),
-      switchMap(operations => this.ePersonService.patch(user, operations)),
+      switchMap(operations =>
+        isNotEmpty(operations) ? this.ePersonService.patch(user, operations) : createSuccessfulRemoteDataObject$({})),
       getFirstCompletedRemoteData(),
       map(rd => rd.hasSucceeded),
     );
@@ -216,6 +217,15 @@ export class AccessibilitySettingsService {
     }
   }
 
+  /**
+   * Clears all settings in the cookie and attempts to clear settings in metadata.
+   * Emits true if settings in metadata were cleared and false otherwise.
+   */
+  clearSettings(): Observable<boolean> {
+    this.setSettingsInCookie({});
+    return this.setSettingsInAuthenticatedUserMetadata({});
+  }
+
   getPlaceholder(setting: AccessibilitySetting): string {
     switch (setting) {
       case AccessibilitySetting.NotificationTimeOut:

src/app/info/accessibility-settings/accessibility-settings.component.html

@@ -54,9 +54,15 @@
       </div>
     </div>
 
-    <button type="submit" (click)="saveSettings()" class="btn btn-primary">
-      {{ 'info.accessibility-settings.submit' | translate }}
-    </button>
+    <div role="group">
+      <button type="submit" (click)="saveSettings()" class="btn btn-primary mr-2">
+        {{ 'info.accessibility-settings.submit' | translate }}
+      </button>
+      <button type="reset" (click)="resetSettings()" class="btn btn-warning">
+        {{ 'info.accessibility-settings.reset' | translate }}
+      </button>
+    </div>
+
   </form>
 
 </div>

src/app/info/accessibility-settings/accessibility-settings.component.ts

@@ -57,4 +57,14 @@ export class AccessibilitySettingsComponent implements OnInit {
     });
   }
 
+  /**
+   * Resets accessibility settings
+   */
+  resetSettings() {
+    this.settingsService.clearSettings().pipe(take(1)).subscribe(() => {
+      this.notificationsService.success(null, this.translateService.instant('info.accessibility-settings.reset-notification'));
+      this.updateFormValues();
+    });
+  }
+
 }

src/assets/i18n/en.json5

@@ -1860,6 +1860,10 @@
 
   "info.accessibility-settings.save-notification.metadata": "Successfully saved settings on the user profile.",
 
+  "info.accessibility-settings.reset-notification": "Successfully reset settings.",
+
+  "info.accessibility-settings.reset": "Reset accessibility settings",
+
   "info.accessibility-settings.submit": "Save accessibility settings",
 
   "info.accessibility-settings.title": "Accessibility settings",