22 lines
515 B
TypeScript
22 lines
515 B
TypeScript
import { CartItem } from '@/constants/types';
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export const calculateTotal = (items: CartItem[]): number => {
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return items.reduce((total, item) => {
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return total + item.price * item.quantity;
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}, 0);
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};
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export const updateItemQuantity = (
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items: CartItem[],
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itemId: string,
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newQuantity: number
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): CartItem[] => {
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// Don't allow negative quantities
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if (newQuantity < 0) {
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return items;
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}
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return items.map((item) =>
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item.id === itemId ? { ...item, quantity: newQuantity } : item
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);
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}; |