cashier_wx/stores/order.js

import {
	defineStore
} from 'pinia';
import {
	computed,
	watchEffect
} from 'vue';
import {
	ref
} from 'vue';

export const useCartStore = defineStore('cart', () => {
	// const dinersNum = uni.cache.get('dinersNum')
	// const isVip = uni.cache.get('orderVIP').isVip //此用户是否是会员
	// const isMemberPrice = uni.cache.get('ordershopUserInfo').isMemberPrice //此店是否可以用会员
	// const isTableFee = uni.cache.get('ordershopUserInfo').isTableFee //此店是否免桌位费
	// const tableFee = uni.cache.get('ordershopUserInfo').tableFee //一个餐位费多钱

	// 计算向上取整
	const roundUpToTwoDecimals = (num, i) => {
		// 先将数字乘以 100 并转换为字符串保留足够的小数位
		let temp = (num * 100).toFixed(10);
		// 向上取整
		let rounded = null
		if (i == 'upward') {
			rounded = Math.ceil(parseFloat(temp));
		} else {
			rounded = Math.floor(parseFloat(temp));
		}
		// 再除以 100 得到保留两位小数的结果
		return rounded / 100;
	};
	
	// 精确计算函数
	const preciseCalculation = (num1, num2) => {
	    // 将数字转换为整数，乘以 100 以保留两位小数
	    const int1 = BigInt(Math.round(num1 * 100));
	    const int2 = BigInt(Math.round(num2 * 100));
	    // 执行乘法运算
	    const result = int1 * int2;
	    // 再除以 10000 以还原为原来的小数
	    return Number(result) / 10000;
	};

	// 计算购物车商品总价格
	const getTotalTotalPrices = (matchedProducts, changeFreeenable = true) => computed(() => {
		if (!matchedProducts || !Array.isArray(matchedProducts)) {
			return 0;
		}
		// console.log(uni.cache.get('orderVIP').isVip, uni.cache.get('ordershopUserInfo').isMemberPrice,
		// 	111)
		// 购物车总数价格
		let cart = matchedProducts.reduce((total, item) => {
			// 是否启用会员价 0否1是
			if (uni.cache.get('orderVIP').isVip == 1 && uni.cache.get('ordershopUserInfo')
				.isMemberPrice == 1 && changeFreeenable) {
				// memberPrice会员价
				return total + (parseFloat(item.memberPrice || item.price) * parseFloat(item
					.num - item
					.returnNum));
			} else {
				// salePrice销售价
				return total + (parseFloat(item.price) * parseFloat(item.num - item.returnNum));
			}
		}, 0);
		
		cart = cart.toFixed(2)
		console.log(parseFloat(cart))
		// 向上取整并保留两位小数
		// let result = roundUpToTwoDecimals(cart, 'upward')
		return parseFloat(cart);
	});

	// 计算商品卷所选择的总价格
	const getTotalProductroll = (matchedProducts) => computed(() => {
		if (!matchedProducts || !Array.isArray(matchedProducts)) {
			return 0;
		}
		// 购物车总数价格
		let cart = matchedProducts.reduce((total, item) => {
			// 是否启用会员价 0否1是
			if (uni.cache.get('orderVIP').isVip == 1 && uni.cache.get('ordershopUserInfo')
				.isMemberPrice == 1) {
				// memberPrice会员价
				return total + parseFloat(item.memberPrice || item.price)
			} else {
				// salePrice销售价
				return total + parseFloat(item.price)
			}
		}, 0);
		// 向上取整并保留两位小数
		let result = roundUpToTwoDecimals(cart, 'upward')
		return result;
	});

	// 桌位置
	const getTotalSeatcharge = (seatNum) => computed(() => {
		// 是否免除桌位费 0 否 1 是
		let cart = 0

		if (uni.cache.get('ordershopUserInfo').isTableFee == 0 && seatNum) {
			cart = parseFloat(seatNum) * parseFloat(uni.cache.get('ordershopUserInfo').tableFee)

			// Math.ceil(parseFloat(seatNum) * parseFloat(
			// uni.cache.get('ordershopUserInfo').tableFee) * 100) / 100;
		}
		// 向下取整并保留两位小数
		let result = roundUpToTwoDecimals(cart, 'downward')
		return result;
	});

	// 计算购物车总打包费用（向下取整并保留两位小数）
	const getTotalPackFee = (cartList) => computed(() => {
		const total = cartList.reduce((sum, item) => {
			return sum + (parseFloat(item.packAmount) * (parseFloat(item.packNumber) || (
				parseFloat(item.num) - parseFloat(item.returnNum))));
		}, 0);
		// 向下取整并保留两位小数
		let result = roundUpToTwoDecimals(total, 'downward')
		console.log(result)
		return result;
		// return Math.floor(total * 100) / 100;
	});

	return {
		getTotalPackFee,
		getTotalSeatcharge,
		getTotalTotalPrices,
		getTotalProductroll
	};
});