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export interface Product {
id: number;
name: string;
price: number;
image: string;
}
interface User {
id: number;
}
interface Cart {
items: Array<{
id: number;
name: string;
count: number;
}>;
}
async function getJson<T>(
incomingReq: Request,
endpoint: string,
): Promise<T> {
const origin = new URL(incomingReq.url).origin;
try {
const response = await fetch(`${origin}${endpoint}`, {
credentials: 'same-origin',
headers: incomingReq.headers,
});
if (!response.ok) {
throw new Error(`GET ${endpoint} failed: ${response.statusText}`);
}
return response.json() as Promise<T>;
} catch (error) {
if (error instanceof DOMException || error instanceof TypeError) {
throw new Error(`GET ${endpoint} failed: ${error.message}`);
}
throw error;
}
}
export async function getProducts(incomingReq: Request): Promise<Product[]> {
return getJson<Product[]>(incomingReq, '/api/products');
}
export async function getProduct(incomingReq: Request, id: number): Promise<Product> {
return getJson<Product>(incomingReq, `/api/products/${id}`);
}
export async function getUser(incomingReq: Request): Promise<User> {
return getJson<User>(incomingReq, `/api/user`);
}
export async function getCart(incomingReq: Request): Promise<Cart> {
return getJson<Cart>(incomingReq, `/api/cart`);
}
export async function addToUserCart(id: number | string, name: string): Promise<void> {
await fetch(`${location.origin}/api/cart`, {
credentials: 'same-origin',
method: 'POST',
mode: 'no-cors',
headers: {
'Content-Type': 'application/json',
Cache: 'no-cache',
},
body: JSON.stringify({
id,
name,
}),
});
}
|
