79730: Replace component ID with unique number

src/app/core/core.module.ts

@@ -162,6 +162,7 @@ import { UsageReport } from './statistics/models/usage-report.model';
 import { RootDataService } from './data/root-data.service';
 import { Root } from './data/root.model';
 import { SearchConfig } from './shared/search/search-filters/search-config.model';
+import { SequenceService } from './shared/sequence.service';
 
 /**
  * When not in production, endpoint responses can be mocked for testing purposes
@@ -282,7 +283,8 @@ const PROVIDERS = [
   FilteredDiscoveryPageResponseParsingService,
   { provide: NativeWindowService, useFactory: NativeWindowFactory },
   VocabularyService,
-  VocabularyTreeviewService
+  VocabularyTreeviewService,
+  SequenceService,
 ];
 
 /**

src/app/core/shared/sequence.service.ts

@@ -0,0 +1,24 @@
+/**
+ * The contents of this file are subject to the license and copyright
+ * detailed in the LICENSE and NOTICE files at the root of the source
+ * tree and available online at
+ *
+ * http://www.dspace.org/license/
+ */
+import { Injectable } from '@angular/core';
+
+@Injectable()
+/**
+ * Provides unique sequential numbers
+ */
+export class SequenceService {
+  private value: number;
+
+  constructor() {
+    this.value = 0;
+  }
+
+  public next(): number {
+    return ++this.value;
+  }
+}

src/app/shared/search/search-filters/search-filter/search-filter.component.spec.ts

@@ -12,6 +12,7 @@ import { SearchFilterConfig } from '../../search-filter-config.model';
 import { FilterType } from '../../filter-type.model';
 import { SearchConfigurationServiceStub } from '../../../testing/search-configuration-service.stub';
 import { SEARCH_CONFIG_SERVICE } from '../../../../+my-dspace-page/my-dspace-page.component';
+import { SequenceService } from '../../../../core/shared/sequence.service';
 
 describe('SearchFilterComponent', () => {
   let comp: SearchFilterComponent;
@@ -65,7 +66,8 @@ describe('SearchFilterComponent', () => {
           provide: SearchFilterService,
           useValue: mockFilterService
         },
-        { provide: SEARCH_CONFIG_SERVICE, useValue: new SearchConfigurationServiceStub() }
+        { provide: SEARCH_CONFIG_SERVICE, useValue: new SearchConfigurationServiceStub() },
+        { provide: SequenceService, useValue: new SequenceService() },
       ],
       schemas: [NO_ERRORS_SCHEMA]
     }).overrideComponent(SearchFilterComponent, {

src/app/shared/search/search-filters/search-filter/search-filter.component.ts

@@ -10,6 +10,7 @@ import { isNotEmpty } from '../../../empty.util';
 import { SearchService } from '../../../../core/shared/search/search.service';
 import { SearchConfigurationService } from '../../../../core/shared/search/search-configuration.service';
 import { SEARCH_CONFIG_SERVICE } from '../../../../+my-dspace-page/my-dspace-page.component';
+import { SequenceService } from '../../../../core/shared/sequence.service';
 
 @Component({
   selector: 'ds-search-filter',
@@ -62,10 +63,15 @@ export class SearchFilterComponent implements OnInit {
    */
   active$: Observable<boolean>;
 
+  private readonly sequenceId: number;
+
   constructor(
     private filterService: SearchFilterService,
     private searchService: SearchService,
-    @Inject(SEARCH_CONFIG_SERVICE) private searchConfigService: SearchConfigurationService) {
+    @Inject(SEARCH_CONFIG_SERVICE) private searchConfigService: SearchConfigurationService,
+    private sequenceService: SequenceService,
+  ) {
+    this.sequenceId = this.sequenceService.next();
   }
 
   /**
@@ -141,13 +147,11 @@ export class SearchFilterComponent implements OnInit {
   }
 
   get regionId(): string {
-    // tslint:disable-next-line:no-string-literal
-    return `search-filter-region-${this.constructor['ɵcmp'].id}`;
+    return `search-filter-region-${this.sequenceId}`;
   }
 
   get toggleId(): string {
-    // tslint:disable-next-line:no-string-literal
-    return `search-filter-toggle-${this.constructor['ɵcmp'].id}`;
+    return `search-filter-toggle-${this.sequenceId}`;
   }
 
   /**