commerce/lib/cart.ts
2020-09-21 14:54:16 -05:00

106 lines
2.6 KiB
TypeScript

import { useState, useCallback } from 'react';
import useSWR, { mutate } from 'swr';
async function getText(res) {
try {
return (await res.text()) || res.statusText;
} catch (error) {
return res.statusText;
}
}
async function getError(res) {
if (res.headers.get('Content-Type')?.includes('application/json')) {
const data = await res.json();
return data.errors[0];
}
return { message: await getText(res) };
}
async function fetcher(url) {
const res = await fetch(url);
if (res.status === 200) {
return res.json();
}
throw await getError(res);
}
export function useCart() {
return useSWR('/api/cart', fetcher);
}
export function useAddToCart() {
const [{ addingToCart, error }, setStatus] = useState({
addingToCart: false,
});
const addToCart = useCallback(async ({ product }) => {
setStatus({ addingToCart: true });
const res = await fetch('/api/cart', {
method: 'POST',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({ product }),
});
// Product added as expected
if (res.status === 200) {
setStatus({ addingToCart: false });
return mutate('/api/cart');
}
const error = await getError(res);
console.error('Adding product to cart failed with:', res.status, error);
setStatus({ addingToCart: false, error });
}, []);
return { addToCart, addingToCart, error };
}
export function useUpdateCart() {
const [{ updatingCart, error }, setStatus] = useState({
updatingCart: false,
});
const updateCart = useCallback(async ({ product, item }) => {
setStatus({ updatingCart: true });
const res = await fetch(
`/api/cart?itemId=${item.id}`,
product.quantity < 1
? { method: 'DELETE' }
: {
method: 'PUT',
headers: {
'Content-Type': 'application/json',
},
body: JSON.stringify({ product }),
}
);
// Product updated as expected
if (res.status === 200) {
setStatus({ updatingCart: false });
return mutate('/api/cart');
}
const error = await getError(res);
console.error('Update to cart failed with:', res.status, error);
setStatus({ updatingCart: false, error });
}, []);
return { updateCart, updatingCart, error };
}
export function useRemoveFromCart() {
const { updateCart, updatingCart, error } = useUpdateCart();
const removeFromCart = async ({ item }) => {
updateCart({ item, product: { quantity: 0 } });
};
return { removeFromCart, removingFromCart: updatingCart, error };
}