feat(shopping): listShoppingList mit Aggregation + Skalierung

tests/integration/shopping-repository.test.ts

@@ -103,3 +103,73 @@ describe('setCartServings', () => {
     expect(() => setCartServings(db, id, -3)).toThrow();
   });
 });
+
+describe('listShoppingList aggregation', () => {
+  it('aggregates same name+unit across recipes', () => {
+    const db = openInMemoryForTest();
+    const a = insertRecipe(db, recipe({
+      title: 'Carbonara', servings_default: 4,
+      ingredients: [{ position: 1, quantity: 200, unit: 'g', name: 'Mehl', note: null, raw_text: '', section_heading: null }]
+    }));
+    const b = insertRecipe(db, recipe({
+      title: 'Lasagne', servings_default: 4,
+      ingredients: [{ position: 1, quantity: 200, unit: 'g', name: 'Mehl', note: null, raw_text: '', section_heading: null }]
+    }));
+    addRecipeToCart(db, a, null, 4);
+    addRecipeToCart(db, b, null, 4);
+    const rows = listShoppingList(db).rows;
+    expect(rows).toHaveLength(1);
+    expect(rows[0].name_key).toBe('mehl');
+    expect(rows[0].unit_key).toBe('g');
+    expect(rows[0].total_quantity).toBe(400);
+    expect(rows[0].from_recipes).toContain('Carbonara');
+    expect(rows[0].from_recipes).toContain('Lasagne');
+  });
+
+  it('keeps different units as separate rows', () => {
+    const db = openInMemoryForTest();
+    const id = insertRecipe(db, recipe({
+      servings_default: 4,
+      ingredients: [
+        { position: 1, quantity: 100, unit: 'g', name: 'Mehl', note: null, raw_text: '', section_heading: null },
+        { position: 2, quantity: 1, unit: 'Pck', name: 'Mehl', note: null, raw_text: '', section_heading: null }
+      ]
+    }));
+    addRecipeToCart(db, id, null, 4);
+    const rows = listShoppingList(db).rows;
+    expect(rows).toHaveLength(2);
+  });
+
+  it('scales quantities by servings/servings_default', () => {
+    const db = openInMemoryForTest();
+    const id = insertRecipe(db, recipe({
+      servings_default: 4,
+      ingredients: [{ position: 1, quantity: 200, unit: 'g', name: 'Mehl', note: null, raw_text: '', section_heading: null }]
+    }));
+    addRecipeToCart(db, id, null, 2);
+    expect(listShoppingList(db).rows[0].total_quantity).toBe(100);
+  });
+
+  it('null quantity stays null after aggregation', () => {
+    const db = openInMemoryForTest();
+    const id = insertRecipe(db, recipe({
+      ingredients: [{ position: 1, quantity: null, unit: null, name: 'Salz', note: null, raw_text: '', section_heading: null }]
+    }));
+    addRecipeToCart(db, id, null);
+    const rows = listShoppingList(db).rows;
+    expect(rows[0].total_quantity).toBeNull();
+    expect(rows[0].unit_key).toBe('');
+  });
+
+  it('counts unchecked rows in uncheckedCount', () => {
+    const db = openInMemoryForTest();
+    const id = insertRecipe(db, recipe({
+      ingredients: [
+        { position: 1, quantity: 1, unit: 'Stk', name: 'Apfel', note: null, raw_text: '', section_heading: null },
+        { position: 2, quantity: 1, unit: 'Stk', name: 'Birne', note: null, raw_text: '', section_heading: null }
+      ]
+    }));
+    addRecipeToCart(db, id, null);
+    expect(listShoppingList(db).uncheckedCount).toBe(2);
+  });
+});