Сделали стикер на корзину

src/services/CartService.js

@@ -0,0 +1,53 @@
+const BASE_URL = 'http://localhost:8000/cart'
+
+export const CartService = {
+	async getCart() {
+		const response = await fetch(BASE_URL)
+		if (!response.ok) throw new Error('Ошибка при получении корзины')
+		return response.json()
+	},
+    async getCartCount() {
+		const response = await fetch(BASE_URL)
+		if (!response.ok) throw new Error('Ошибка при получении корзины')
+		return response.json().length
+	},
+	async addToCart(product) {
+		const existing = await fetch(`${BASE_URL}?productId=${product.id}`)
+		const data = await existing.json()
+
+		if (data.length > 0) {
+			const current = data[0]
+			return fetch(`${BASE_URL}/${current.id}`, {
+				method: 'PATCH',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({ quantity: current.quantity + 1 }),
+			})
+		} else {
+			return fetch(BASE_URL, {
+				method: 'POST',
+				headers: { 'Content-Type': 'application/json' },
+				body: JSON.stringify({
+					productId: product.id,
+					name: product.name,
+					price: product.price,
+					imageUrl: product.imageUrl,
+					quantity: 1,
+				}),
+			})
+		}
+	},
+
+	async updateQuantity(id, quantity) {
+		return fetch(`${BASE_URL}/${id}`, {
+			method: 'PATCH',
+			headers: { 'Content-Type': 'application/json' },
+			body: JSON.stringify({ quantity }),
+		})
+	},
+
+	async removeFromCart(id) {
+		return fetch(`${BASE_URL}/${id}`, {
+			method: 'DELETE',
+		})
+	},
+}