feat(staples): load categories and ingredients, group by category

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

frontend/src/routes/household/staples/+page.server.ts

@@ -0,0 +1,28 @@
+import type { PageServerLoad } from './$types';
+import { apiClient } from '$lib/server/api';
+
+export const load: PageServerLoad = async ({ fetch }) => {
+	const api = apiClient(fetch);
+
+	const [categoriesResult, ingredientsResult] = await Promise.all([
+		api.GET('/v1/ingredient-categories'),
+		api.GET('/v1/ingredients')
+	]);
+
+	const rawCategories = categoriesResult.data ?? [];
+	const rawIngredients = ingredientsResult.data ?? [];
+
+	const categories = rawCategories.map((cat) => ({
+		id: cat.id!,
+		name: cat.name!,
+		ingredients: rawIngredients
+			.filter((ing) => ing.category?.id === cat.id)
+			.map((ing) => ({
+				id: ing.id!,
+				name: ing.name!,
+				isStaple: ing.isStaple ?? false
+			}))
+	}));
+
+	return { categories };
+};

frontend/src/routes/household/staples/page.server.test.ts

@@ -0,0 +1,87 @@
+import { describe, it, expect, vi, beforeEach } from 'vitest';
+
+vi.mock('$env/dynamic/private', () => ({
+	env: { BACKEND_URL: 'http://localhost:8080' }
+}));
+
+const mockGet = vi.fn();
+vi.mock('$lib/server/api', () => ({
+	apiClient: () => ({ GET: mockGet })
+}));
+
+const mockCategories = [
+	{ id: 'cat-1', name: 'Öle & Fette' },
+	{ id: 'cat-2', name: 'Gewürze' }
+];
+
+const mockIngredients = [
+	{ id: 'ing-1', name: 'Olivenöl', isStaple: true, category: { id: 'cat-1', name: 'Öle & Fette' } },
+	{ id: 'ing-2', name: 'Butter', isStaple: false, category: { id: 'cat-1', name: 'Öle & Fette' } },
+	{ id: 'ing-3', name: 'Salz', isStaple: true, category: { id: 'cat-2', name: 'Gewürze' } }
+];
+
+describe('household staples page — load', () => {
+	let load: any;
+
+	beforeEach(async () => {
+		mockGet.mockReset();
+		vi.resetModules();
+		const mod = await import('./+page.server');
+		load = mod.load;
+	});
+
+	function mockApiResponses() {
+		mockGet.mockImplementation((path: string) => {
+			if (path === '/v1/ingredient-categories') {
+				return Promise.resolve({ data: mockCategories, error: undefined });
+			}
+			if (path === '/v1/ingredients') {
+				return Promise.resolve({ data: mockIngredients, error: undefined });
+			}
+		});
+	}
+
+	it('fetches both categories and ingredients in parallel', async () => {
+		mockApiResponses();
+		await load({ fetch: vi.fn() } as any);
+
+		const calls = mockGet.mock.calls.map((c) => c[0]);
+		expect(calls).toContain('/v1/ingredient-categories');
+		expect(calls).toContain('/v1/ingredients');
+	});
+
+	it('groups ingredients by category id', async () => {
+		mockApiResponses();
+		const result = await load({ fetch: vi.fn() } as any);
+
+		expect(result.categories).toHaveLength(2);
+		const oele = result.categories.find((c: any) => c.id === 'cat-1');
+		expect(oele.ingredients).toHaveLength(2);
+		expect(oele.ingredients[0].name).toBe('Olivenöl');
+	});
+
+	it('preserves isStaple flag on each ingredient', async () => {
+		mockApiResponses();
+		const result = await load({ fetch: vi.fn() } as any);
+
+		const oele = result.categories.find((c: any) => c.id === 'cat-1');
+		expect(oele.ingredients.find((i: any) => i.name === 'Olivenöl').isStaple).toBe(true);
+		expect(oele.ingredients.find((i: any) => i.name === 'Butter').isStaple).toBe(false);
+	});
+
+	it('categories without ingredients are included with empty array', async () => {
+		mockGet.mockImplementation((path: string) => {
+			if (path === '/v1/ingredient-categories') {
+				return Promise.resolve({ data: [...mockCategories, { id: 'cat-3', name: 'Leer' }], error: undefined });
+			}
+			if (path === '/v1/ingredients') {
+				return Promise.resolve({ data: mockIngredients, error: undefined });
+			}
+		});
+
+		const result = await load({ fetch: vi.fn() } as any);
+		const leer = result.categories.find((c: any) => c.id === 'cat-3');
+		expect(leer).toBeDefined();
+		expect(leer.ingredients).toHaveLength(0);
+	});
+});