arch(sprint1): drive widget registry from manifest

src/app/widgets/registry/widget-registry.bootstrap.service.ts

@@ -1,16 +1,59 @@
 import { Injectable } from '@angular/core';
+import { HttpClient } from '@angular/common/http';
+import { Observable, map, of } from 'rxjs';
+import { catchError } from 'rxjs/operators';
 import { HeroWidgetComponent, FooterNavigationWidgetComponent, ProductCarouselWidgetComponent } from '../ui';
+import { RegisteredWidget } from '../contracts/widget-component.contract';
 import { WidgetRegistryService } from './widget-registry.service';
 
+interface WidgetManifestItem {
+  type: string;
+  version: string;
+  componentKey: string;
+  enabled?: boolean;
+}
+
+interface WidgetManifest {
+  widgets: WidgetManifestItem[];
+}
+
+const APPROVED_WIDGET_COMPONENTS: Record<string, RegisteredWidget['component']> = {
+  'hero': HeroWidgetComponent,
+  'footer-navigation': FooterNavigationWidgetComponent,
+  'product-carousel': ProductCarouselWidgetComponent
+};
+
 @Injectable({ providedIn: 'root' })
 export class WidgetRegistryBootstrapService {
-  constructor(private readonly registry: WidgetRegistryService) {}
+  private readonly manifestUrl = '/assets/mock/bootstrap/widget-manifest.json';
 
-  registerDefaults(): void {
-    this.registry.registerMany([
-      { type: 'hero', version: '1.0.0', component: HeroWidgetComponent },
-      { type: 'footer-navigation', version: '1.0.0', component: FooterNavigationWidgetComponent },
-      { type: 'product-carousel', version: '1.0.0', component: ProductCarouselWidgetComponent }
-    ]);
+  constructor(
+    private readonly registry: WidgetRegistryService,
+    private readonly http: HttpClient
+  ) {}
+
+  registerFromManifest(): Observable<void> {
+    return this.http.get<WidgetManifest>(this.manifestUrl).pipe(
+      map((manifest) => {
+        const widgets = (manifest.widgets ?? [])
+          .filter((item) => item.enabled !== false)
+          .map((item): RegisteredWidget | null => {
+            const component = APPROVED_WIDGET_COMPONENTS[item.componentKey];
+            if (!component) {
+              return null;
+            }
+
+            return {
+              type: item.type,
+              version: item.version,
+              component
+            };
+          })
+          .filter((item): item is RegisteredWidget => item !== null);
+
+        this.registry.registerMany(widgets);
+      }),
+      catchError(() => of(undefined))
+    );
   }
 }