108588: Fixed browse by date tab's year dropdown always being empty

- The data passed to the injector in BrowseByComponent was not updated by ngOnChanges
- Also refactored the injector logic to StartsWithLoaderComponent

src/app/browse-by/browse-by-metadata/browse-by-metadata.component.ts

@@ -109,7 +109,7 @@ export class BrowseByMetadataComponent implements OnInit, OnChanges, OnDestroy {
    * The list of StartsWith options
    * Should be defined after ngOnInit is called!
    */
-  startsWithOptions;
+  startsWithOptions: (string | number)[];
 
   /**
    * The value we're browsing items for

src/app/shared/browse-by/browse-by.component.html

@@ -1,6 +1,7 @@
 <ng-container *ngVar="(objects$ | async) as objects">
   <h1 *ngIf="displayTitle">{{title | translate}}</h1>
-  <ng-container *ngComponentOutlet="getStartsWithComponent(); injector: objectInjector;"></ng-container>
+  <ds-starts-with-loader [paginationId]="paginationConfig?.id" [startsWithOptions]="startsWithOptions" [type]="type">
+  </ds-starts-with-loader>
   <div *ngIf="objects?.hasSucceeded && !objects?.isLoading && objects?.payload?.page.length > 0" @fadeIn>
       <div *ngIf="shouldDisplayResetButton$ |async" class="mb-2 reset">
         <ds-themed-results-back-button [back]="back" [buttonLabel]="buttonLabel"></ds-themed-results-back-button>

src/app/shared/browse-by/browse-by.component.ts

@@ -1,12 +1,12 @@
-import { Component, EventEmitter, Injector, Input, OnDestroy, OnInit, Output } from '@angular/core';
+import { Component, EventEmitter, Injector, Input, OnDestroy, OnInit, Output, OnChanges } from '@angular/core';
 import { RemoteData } from '../../core/data/remote-data';
 import { PaginatedList } from '../../core/data/paginated-list.model';
 import { PaginationComponentOptions } from '../pagination/pagination-component-options.model';
 import { SortDirection, SortOptions } from '../../core/cache/models/sort-options.model';
 import { fadeIn, fadeInOut } from '../animations/fade';
 import { BehaviorSubject, combineLatest as observableCombineLatest, Observable, Subscription } from 'rxjs';
 import { ListableObject } from '../object-collection/shared/listable-object.model';
-import { getStartsWithComponent, StartsWithType } from '../starts-with/starts-with-decorator';
+import { StartsWithType } from '../starts-with/starts-with-decorator';
 import { PaginationService } from '../../core/pagination/pagination.service';
 import { ViewMode } from '../../core/shared/view-mode.model';
 import { RouteService } from '../../core/services/route.service';
@@ -26,7 +26,7 @@ import { TranslateService } from '@ngx-translate/core';
 /**
  * Component to display a browse-by page for any ListableObject
  */
-export class BrowseByComponent implements OnInit, OnDestroy {
+export class BrowseByComponent implements OnInit, OnChanges, OnDestroy {
 
   /**
    * ViewMode that should be passed to {@link ListableObjectComponentLoaderComponent}.
@@ -67,7 +67,7 @@ export class BrowseByComponent implements OnInit, OnDestroy {
   /**
    * The list of options to render for the StartsWith component
    */
-  @Input() startsWithOptions = [];
+  @Input() startsWithOptions: (string | number)[] = [];
 
   /**
    * Whether or not the pagination should be rendered as simple previous and next buttons instead of the normal pagination
@@ -99,16 +99,6 @@ export class BrowseByComponent implements OnInit, OnDestroy {
    */
   @Output() sortDirectionChange = new EventEmitter<SortDirection>();
 
-  /**
-   * An object injector used to inject the startsWithOptions to the switchable StartsWith component
-   */
-  objectInjector: Injector;
-
-  /**
-   * Declare SortDirection enumeration to use it in the template
-   */
-  public sortDirections = SortDirection;
-
   /**
    * Observable that tracks if the back button should be displayed based on the path parameters
    */
@@ -142,7 +132,7 @@ export class BrowseByComponent implements OnInit, OnDestroy {
    */
   back = () => {
     const page = +this.previousPage$.value > 1 ? +this.previousPage$.value : 1;
-    this.paginationService.updateRoute(this.paginationConfig.id, {page: page}, {[this.paginationConfig.id + '.return']: null, value: null, startsWith: null});
+    this.paginationService.updateRoute(this.paginationConfig.id, { page: page }, { [this.paginationConfig.id + '.return']: null, value: null, startsWith: null });
   };
 
   /**
@@ -159,44 +149,19 @@ export class BrowseByComponent implements OnInit, OnDestroy {
     this.next.emit(true);
   }
 
-  /**
-   * Change the page size
-   * @param size
-   */
-  doPageSizeChange(size) {
-    this.paginationService.updateRoute(this.paginationConfig.id,{pageSize: size});
-  }
-
-  /**
-   * Change the sort direction
-   * @param direction
-   */
-  doSortDirectionChange(direction) {
-    this.paginationService.updateRoute(this.paginationConfig.id,{sortDirection: direction});
-  }
-
-  /**
-   * Get the switchable StartsWith component dependant on the type
-   */
-  getStartsWithComponent() {
-    return getStartsWithComponent(this.type);
-  }
-
   ngOnInit(): void {
-    this.objectInjector = Injector.create({
-      providers: [
-        { provide: 'startsWithOptions', useFactory: () => (this.startsWithOptions), deps:[] },
-        { provide: 'paginationId', useFactory: () => (this.paginationConfig?.id), deps:[] }
-      ],
-      parent: this.injector
-    });
-
     const startsWith$ = this.routeService.getQueryParameterValue('startsWith');
     const value$ = this.routeService.getQueryParameterValue('value');
 
     this.shouldDisplayResetButton$ = observableCombineLatest([startsWith$, value$]).pipe(
       map(([startsWith, value]) => hasValue(startsWith) || hasValue(value))
     );
+  }
+
+  ngOnChanges(): void {
+    if (this.sub) {
+      this.sub.unsubscribe();
+    }
     this.sub = this.routeService.getQueryParameterValue(this.paginationConfig.id + '.return').subscribe(this.previousPage$);
   }
 

src/app/shared/shared.module.ts

@@ -282,6 +282,7 @@ import {
 import { BitstreamListItemComponent } from './object-list/bitstream-list-item/bitstream-list-item.component';
 import { NgxPaginationModule } from 'ngx-pagination';
 import { DynamicComponentLoaderDirective } from './abstract-component-loader/dynamic-component-loader.directive';
+import { StartsWithLoaderComponent } from './starts-with/starts-with-loader.component';
 
 const MODULES = [
   CommonModule,
@@ -374,7 +375,7 @@ const COMPONENTS = [
   ThemedStatusBadgeComponent,
   BadgesComponent,
   ThemedBadgesComponent,
-
+  StartsWithLoaderComponent,
   ItemSelectComponent,
   CollectionSelectComponent,
   MetadataRepresentationLoaderComponent,

src/app/shared/starts-with/date/starts-with-date.component.spec.ts

@@ -3,9 +3,8 @@ import { CommonModule } from '@angular/common';
 import { RouterTestingModule } from '@angular/router/testing';
 import { TranslateModule } from '@ngx-translate/core';
 import { NgbModule } from '@ng-bootstrap/ng-bootstrap';
-import { ActivatedRoute, NavigationExtras, Router } from '@angular/router';
+import { ActivatedRoute, Router } from '@angular/router';
 import { NO_ERRORS_SCHEMA } from '@angular/core';
-import { of as observableOf } from 'rxjs';
 import { By } from '@angular/platform-browser';
 import { StartsWithDateComponent } from './starts-with-date.component';
 import { ActivatedRouteStub } from '../../testing/active-router.stub';
@@ -17,29 +16,25 @@ import { PaginationServiceStub } from '../../testing/pagination-service.stub';
 describe('StartsWithDateComponent', () => {
   let comp: StartsWithDateComponent;
   let fixture: ComponentFixture<StartsWithDateComponent>;
-  let route: ActivatedRoute;
-  let router: Router;
-  let paginationService;
 
-  const options = [2019, 2018, 2017, 2016, 2015];
+  let route: ActivatedRouteStub;
+  let paginationService: PaginationServiceStub;
+  let router: RouterStub;
 
-  const activatedRouteStub = Object.assign(new ActivatedRouteStub(), {
-    params: observableOf({}),
-    queryParams: observableOf({})
-  });
+  const options = [2019, 2018, 2017, 2016, 2015];
 
-  paginationService = new PaginationServiceStub();
+  beforeEach(waitForAsync(async () => {
+    route = new ActivatedRouteStub();
+    router = new RouterStub();
+    paginationService = new PaginationServiceStub();
 
-  beforeEach(waitForAsync(() => {
-    TestBed.configureTestingModule({
+    await TestBed.configureTestingModule({
       imports: [CommonModule, RouterTestingModule.withRoutes([]), TranslateModule.forRoot(), NgbModule],
       declarations: [StartsWithDateComponent, EnumKeysPipe],
       providers: [
-        { provide: 'startsWithOptions', useValue: options },
-        { provide: 'paginationId', useValue: 'page-id' },
-        { provide: ActivatedRoute, useValue: activatedRouteStub },
+        { provide: ActivatedRoute, useValue: route },
         { provide: PaginationService, useValue: paginationService },
-        { provide: Router, useValue: new RouterStub() }
+        { provide: Router, useValue: router },
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).compileComponents();
@@ -48,9 +43,9 @@ describe('StartsWithDateComponent', () => {
   beforeEach(() => {
     fixture = TestBed.createComponent(StartsWithDateComponent);
     comp = fixture.componentInstance;
+    comp.paginationId = 'page-id';
+    comp.startsWithOptions = options;
     fixture.detectChanges();
-    route = (comp as any).route;
-    router = (comp as any).router;
   });
 
   it('should create a FormGroup containing a startsWith FormControl', () => {
@@ -156,10 +151,6 @@ describe('StartsWithDateComponent', () => {
   describe('when filling in the input form', () => {
     let form;
     const expectedValue = '2015';
-    const extras: NavigationExtras = {
-      queryParams: Object.assign({ startsWith: expectedValue }),
-      queryParamsHandling: 'merge'
-    };
 
     beforeEach(() => {
       form = fixture.debugElement.query(By.css('form'));

src/app/shared/starts-with/date/starts-with-date.component.ts

@@ -1,10 +1,7 @@
-import { Component, Inject } from '@angular/core';
-import { ActivatedRoute, Router } from '@angular/router';
-
+import { Component, OnInit } from '@angular/core';
 import { renderStartsWithFor, StartsWithType } from '../starts-with-decorator';
 import { StartsWithAbstractComponent } from '../starts-with-abstract.component';
 import { hasValue } from '../../empty.util';
-import { PaginationService } from '../../../core/pagination/pagination.service';
 
 /**
  * A switchable component rendering StartsWith options for the type "Date".
@@ -16,7 +13,7 @@ import { PaginationService } from '../../../core/pagination/pagination.service';
   templateUrl: './starts-with-date.component.html'
 })
 @renderStartsWithFor(StartsWithType.date)
-export class StartsWithDateComponent extends StartsWithAbstractComponent {
+export class StartsWithDateComponent extends StartsWithAbstractComponent implements OnInit {
 
   /**
    * A list of options for months to select from
@@ -33,14 +30,6 @@ export class StartsWithDateComponent extends StartsWithAbstractComponent {
    */
   startsWithYear: number;
 
-  public constructor(@Inject('startsWithOptions') public startsWithOptions: any[],
-                     @Inject('paginationId') public paginationId: string,
-                     protected paginationService: PaginationService,
-                     protected route: ActivatedRoute,
-                     protected router: Router) {
-    super(startsWithOptions, paginationId, paginationService, route, router);
-  }
-
   ngOnInit() {
     this.monthOptions = [
       'none',
@@ -133,13 +122,6 @@ export class StartsWithDateComponent extends StartsWithAbstractComponent {
     }
   }
 
-  /**
-   * Get startsWithYear as a number;
-   */
-  getStartsWithYear() {
-    return this.startsWithYear;
-  }
-
   /**
    * Get startsWithMonth as a number;
    */

src/app/shared/starts-with/starts-with-abstract.component.ts

@@ -1,9 +1,10 @@
-import { Component, Inject, OnDestroy, OnInit } from '@angular/core';
+import { Component, OnDestroy, OnInit, Input } from '@angular/core';
 import { ActivatedRoute, Router } from '@angular/router';
 import { Subscription } from 'rxjs';
 import { UntypedFormControl, UntypedFormGroup } from '@angular/forms';
 import { hasValue } from '../empty.util';
 import { PaginationService } from '../../core/pagination/pagination.service';
+import { StartsWithType } from './starts-with-decorator';
 
 /**
  * An abstract component to render StartsWith options
@@ -13,6 +14,13 @@ import { PaginationService } from '../../core/pagination/pagination.service';
   template: ''
 })
 export abstract class StartsWithAbstractComponent implements OnInit, OnDestroy {
+
+  @Input() paginationId: string;
+
+  @Input() startsWithOptions: (string | number)[];
+
+  @Input() type: StartsWithType;
+
   /**
    * The currently selected startsWith in string format
    */
@@ -28,11 +36,11 @@ export abstract class StartsWithAbstractComponent implements OnInit, OnDestroy {
    */
   subs: Subscription[] = [];
 
-  public constructor(@Inject('startsWithOptions') public startsWithOptions: any[],
-                     @Inject('paginationId') public paginationId: string,
-                     protected paginationService: PaginationService,
-                     protected route: ActivatedRoute,
-                     protected router: Router) {
+  public constructor(
+    protected paginationService: PaginationService,
+    protected route: ActivatedRoute,
+    protected router: Router,
+  ) {
   }
 
   ngOnInit(): void {
@@ -55,15 +63,6 @@ export abstract class StartsWithAbstractComponent implements OnInit, OnDestroy {
     return this.startsWith;
   }
 
-  /**
-   * Set the startsWith by event
-   * @param event
-   */
-  setStartsWithEvent(event: Event) {
-    this.startsWith = (event.target as HTMLInputElement).value;
-    this.setStartsWithParam();
-  }
-
   /**
    * Set the startsWith by string
    * @param startsWith
@@ -82,7 +81,7 @@ export abstract class StartsWithAbstractComponent implements OnInit, OnDestroy {
     if (resetPage) {
       this.paginationService.updateRoute(this.paginationId, {page: 1}, { startsWith: this.startsWith });
     } else {
-      this.router.navigate([], {
+      void this.router.navigate([], {
         queryParams: Object.assign({ startsWith: this.startsWith }),
         queryParamsHandling: 'merge'
       });