132 lines
3.7 KiB
JavaScript
132 lines
3.7 KiB
JavaScript
// Basket is stored locally only and is not persisted to the server.
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// It is also used to store the current user's basket.
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// The structure of the basket is in local storage and is as follows:
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// {
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// "basket": {
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// "items": {
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// "item1~modifier": { quantity, type },
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// "item2": { quantity, type },
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// ...
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// },
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// "total": total
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// },
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// }
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// TODO: Does the localstorage have a problem with mutual exclusion?
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// TODO: Should the basket be persisted to the server?
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export function GetBasketItems() {
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if (localStorage.getItem('basket') === null || !localStorage.getItem('basket')) {
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return;
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}
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return JSON.parse(localStorage.getItem('basket')).items;
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}
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export function ClearBasket() {
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localStorage.removeItem('basket');
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}
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export function AddProductToBasket(product, type, amount, brickModifier = 'none') {
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if (localStorage.getItem('basket') === null || !localStorage.getItem('basket')) {
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localStorage.setItem('basket', JSON.stringify({
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items: {},
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total: 0,
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}));
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}
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const basket = JSON.parse(localStorage.getItem('basket'));
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if (type === 'brick') {
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product += '~' + brickModifier;
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}
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if (basket.items[product]) {
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basket.items[product].quantity += amount;
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} else {
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basket.items[product] = {
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quantity: amount,
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type,
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};
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}
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basket.total += amount;
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localStorage.setItem('basket', JSON.stringify(basket));
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}
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export function RemoveProductFromBasket(product, type, amount, brickModifier = 'none') {
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if (localStorage.getItem('basket') === null || !localStorage.getItem('basket')) {
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return;
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}
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const basket = JSON.parse(localStorage.getItem('basket'));
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if (type === 'brick') {
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product += '~' + brickModifier;
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}
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if (basket.items[product]) {
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if (basket.items[product].quantity > amount) {
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basket.items[product].quantity -= amount;
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} else {
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delete basket.items[product];
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}
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}
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basket.total -= amount;
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localStorage.setItem('basket', JSON.stringify(basket));
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}
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export function GetBasketTotal() {
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if (localStorage.getItem('basket') === null || !localStorage.getItem('basket')) {
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return 0;
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}
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const basket = JSON.parse(localStorage.getItem('basket'));
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return basket.total;
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}
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export async function GetBasketTotalPrice(discount = 0, type = '£', entity = undefined) {
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if (localStorage.getItem('basket') === null || !localStorage.getItem('basket')) {
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return 0;
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}
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const basket = JSON.parse(localStorage.getItem('basket'));
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const res = await fetch('/api/basket/price', {
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method: 'POST',
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headers: {
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'Content-Type': 'application/json',
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},
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body: JSON.stringify(basket),
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}).then(res => res.json());
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if (res.error) {
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return 0;
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}
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if (discount !== 0) {
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return res.data.subtotal - GetAbsoluteBasketDiscount(discount, type, entity);
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}
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return res.data.subtotal;
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}
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export function GetAbsoluteBasketDiscount(discount = 0, type = '£', entity = undefined) {
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if (localStorage.getItem('basket') === null || !localStorage.getItem('basket')) {
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return;
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}
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const basket = JSON.parse(localStorage.getItem('basket'));
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let discountAccumulator = 0;
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for (const [key, product] of Object.entries(basket.items)) {
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if (product.type === entity) {
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if (type === '£') {
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discountAccumulator += product.quantity * discount;
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}
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}
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}
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return discountAccumulator;
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}
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