70 lines
1.8 KiB
TypeScript
70 lines
1.8 KiB
TypeScript
import { defineStore } from 'pinia'
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import type { Product } from './product'
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export const useCartStore = defineStore('cart', () => {
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// 购物车商品列表
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const cartItems = ref<Array<{ product: Product; quantity: number }>>([])
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// 添加商品到购物车
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const addToCart = (product: Product, quantity: number = 1): boolean => {
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if (quantity > product.stock && product.stock !== -1) {
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return false;
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}
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const existingItem = cartItems.value.find(item => item.product.id === product.id)
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if (existingItem) {
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if (existingItem.quantity + quantity > product.stock && product.stock !== -1) {
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return false;
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}
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existingItem.quantity += quantity
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} else {
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cartItems.value.push({ product, quantity })
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}
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return true;
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}
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// 移除商品
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const removeFromCart = (productId: number, quantity: number = 1) => {
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const index = cartItems.value.findIndex(item => item.product.id === productId)
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if (index !== -1) {
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if (cartItems.value[index].quantity <= quantity) {
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cartItems.value.splice(index, 1)
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} else {
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cartItems.value[index].quantity -= quantity
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}
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}
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}
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// 计算总价
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const totalPrice = computed(() => {
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return cartItems.value.reduce((sum, item) => {
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return sum + (item.product.price || 0) * item.quantity
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}, 0)
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})
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//计算总数
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const totalQuantity = computed(() => {
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return cartItems.value.reduce((sum, item) => {
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return sum + item.quantity
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}, 0)
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})
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// 清空购物车
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const clearCart = () => {
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cartItems.value = []
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}
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return {
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cartItems,
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addToCart,
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removeFromCart,
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totalPrice,
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totalQuantity,
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clearCart
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}
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})
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// 支持在setup外使用
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export function useCartStoreOutside() {
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return useCartStore()
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}
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