refactor: compute favorite links in backend

app/collections/controllers/show_collections_controller.ts

@@ -1,17 +1,24 @@
 import { CollectionService } from '#collections/services/collection_service';
+import { LinkService } from '#links/services/link_service';
 import { inject } from '@adonisjs/core';
 import type { HttpContext } from '@adonisjs/core/http';
 
 @inject()
 export default class ShowCollectionsController {
-	constructor(private collectionService: CollectionService) {}
+	constructor(
+		private collectionService: CollectionService,
+		private linkService: LinkService
+	) {}
 
 	// Dashboard
 	async render({ inertia, response }: HttpContext) {
 		const activeCollectionId =
 			await this.collectionService.validateCollectionId(false);
-		const collections =
-			await this.collectionService.getCollectionsForAuthenticatedUser();
+		const [collections, favoriteLinks] = await Promise.all([
+			this.collectionService.getCollectionsForAuthenticatedUser(),
+			this.linkService.getFavoriteLinksForAuthenticatedUser(),
+		]);
+
 		if (collections.length === 0) {
 			return response.redirectToNamedRoute('collection.create-form');
 		}
@@ -26,8 +33,8 @@ export default class ShowCollectionsController {
 
 		return inertia.render('dashboard', {
 			collections: collections.map((collection) => collection.serialize()),
-			activeCollection:
-				activeCollection?.serialize() || collections[0].serialize(),
+			favoriteLinks: favoriteLinks.map((link) => link.serialize()),
+			activeCollection: activeCollection?.serialize(),
 		});
 	}
 }

app/links/services/link_service.ts

@@ -50,6 +50,14 @@ export class LinkService {
 			.update({ favorite });
 	}
 
+	async getFavoriteLinksForAuthenticatedUser() {
+		const context = this.getAuthContext();
+		return await Link.query()
+			.where('author_id', context.auth.user!.id)
+			.where('favorite', true)
+			.orderBy('created_at');
+	}
+
 	getAuthContext() {
 		const context = HttpContext.getOrFail();
 		if (!context.auth.user || !context.auth.user.id) {