caimei-applets-hehe/common/couponUtil.js

import { isIntersect } from '@/common/util.js'
// 优惠商品统计价格
export let countPrice = 0

// 获取选中商品
export function fetchSelectedProducts(goodsList) {
    const productList = []
    goodsList.forEach(shop => {
        shop.productList.forEach(prod => {
            if (prod.productsChecked) {
                productList.push(prod)
            }
        })
    })
    console.log(productList)
    return productList
}

// 根据选中商品筛选可用优惠券并排序
export function findCouponBySelected(ids, couponList) {
    return couponList.filter(coupon => coupon.productType === 1 || isIntersect(ids, coupon.productIds.split(',')))
        .sort((a, b) => b.couponAmount - a.couponAmount)
}

// 判断可用优惠券是否满足使用条件
export function canUseCoupon(current, productIds, canUseCouponList, selectedPoducts) {
    if (productIds.length <= 0) return -1
    const len = canUseCouponList.length
    if (current >= len) return len
    const currentCoupon = canUseCouponList[current]
    // 无门槛
    if (currentCoupon.noThresholdFlag === 1) return current
    // 是否满足条件
    if (currentCoupon.noThresholdFlag === 0) {
        countPrice = selectedPoducts.reduce((countPrice, prod) => {
            // 全部商品可用
            if (currentCoupon.productType === 1) {
                countPrice += prod.price * prod.productCount
            } else {
                // 部分商品可用
                const couponProductIds = currentCoupon.productIds.split(',')
                if (couponProductIds.includes(prod.productId.toString())) {
                    countPrice += prod.price * prod.productCount
                }
            }
            return countPrice
        }, 0)
        if (countPrice >= currentCoupon.touchPrice) return current
    }
    return canUseCoupon(++current, productIds, canUseCouponList, selectedPoducts)
}

export function getCountPrice(){
    return countPrice
}