root
56 lines
1.3 KiB
TypeScript
56 lines
1.3 KiB
TypeScript
import {
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addOrderLine,
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calculateOrderItemCount,
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calculateOrderTotal,
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updateOrderLineQuantity,
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} from '../shared/order-line';
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import type { CartAction, CartState } from './entities';
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/** Pure cart state machine — no React, no localStorage. */
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export function cartReducer(state: CartState, action: CartAction): CartState {
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switch (action.type) {
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case 'ADD_ITEM':
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return { ...state, items: addOrderLine(state.items, action.payload) };
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case 'REMOVE_ITEM':
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return {
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...state,
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items: state.items.filter((item) => item.id !== action.payload),
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};
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case 'UPDATE_QUANTITY':
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return {
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...state,
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items: updateOrderLineQuantity(
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state.items,
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action.payload.id,
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action.payload.quantity
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),
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};
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case 'CLEAR_CART':
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return { ...state, items: [] };
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case 'RESTORE_ITEMS':
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return { ...state, items: action.payload };
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case 'TOGGLE_CART':
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return { ...state, isOpen: !state.isOpen };
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case 'OPEN_CART':
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return { ...state, isOpen: true };
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case 'CLOSE_CART':
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return { ...state, isOpen: false };
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default:
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return state;
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}
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}
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export function getCartTotals(items: CartState['items']) {
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return {
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totalItems: calculateOrderItemCount(items),
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totalPrice: calculateOrderTotal(items),
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};
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} |