@pisell/pisellos/dist/modules/Summary/utils.js

一个可扩展的前端模块化SDK框架，支持插件系统

import Decimal from 'decimal.js';
export var calculatePriceDetails = function calculatePriceDetails(shopInfo, items) {
  var subtotal = new Decimal(calculateSubtotal(items));
  var totalTaxFee = new Decimal(calculateTaxFee(shopInfo, items));

  // 计算总价
  var total = shopInfo !== null && shopInfo !== void 0 && shopInfo.is_price_include_tax ? subtotal : subtotal.plus(totalTaxFee);

  // 计算定金
  var deposit = calculateDeposit(items);
  return {
    subtotal: subtotal.toFixed(2),
    total: total.toFixed(2),
    taxTitle: shopInfo === null || shopInfo === void 0 ? void 0 : shopInfo.tax_title,
    totalTaxFee: totalTaxFee.toFixed(2),
    isPriceIncludeTax: shopInfo === null || shopInfo === void 0 ? void 0 : shopInfo.is_price_include_tax,
    deposit: deposit
  };
};

/**
 * 计算商品小计（不含其他费用）
 * @param items - 购物车商品数组
 * @returns 商品总价字符串，保留2位小数
 */
export var calculateSubtotal = function calculateSubtotal(items) {
  if (!(items !== null && items !== void 0 && items.length)) {
    return '0.00';
  }
  var subtotal = items.reduce(function (sum, item) {
    var cartItemTotalPrice = new Decimal(item.summaryTotal || 0);
    return sum.plus(cartItemTotalPrice);
  }, new Decimal(0));
  return subtotal.toFixed(2);
};

/**
 * @title: 单个商品的税费
 * @description:
 * 单个商品的税费 = 商品销售单价（折扣后） * 税率 * is_charge_tax /( 1+ 税率 * is_price_include_tax)
 * $taxFee = $price * $taxRate * $isChargeTax / (1 + $taxRate * $isPriceIncludeTax);
 * @return {*}
 * @Author: xiangfeng.xue
 */
export var calculateTaxFee = function calculateTaxFee(shopInfo, items) {
  if (!(items !== null && items !== void 0 && items.length)) {
    return '0.00';
  }
  var _ref = shopInfo || {},
    is_price_include_tax = _ref.is_price_include_tax,
    tax_rate = _ref.tax_rate;
  var totalTaxFee = items.reduce(function (sum, item) {
    var cartItemTotalPrice = new Decimal(item.summaryTotal || 0);
    var taxRate = new Decimal(tax_rate || 0).div(100);
    var productTaxRate = cartItemTotalPrice.times(taxRate).times((item === null || item === void 0 ? void 0 : item.is_charge_tax) || 0).div(taxRate.times(is_price_include_tax || 0).plus(1));
    return sum.plus(productTaxRate);
  }, new Decimal(0));
  return totalTaxFee;
};

/**
 * @title: 计算定金
 * @param items - 购物车商品数组
 * @returns 定金字符串，保留2位小数
 */
export var calculateDeposit = function calculateDeposit(items) {
  if (!(items !== null && items !== void 0 && items.length)) {
    return undefined;
  }
  var protocols = [];
  var hasDeposit = false;
  var total = items.reduce(function (sum, item) {
    if (item !== null && item !== void 0 && item.deposit) {
      var _item$deposit, _item$deposit2;
      hasDeposit = true;
      var cartItemTotalPrice = new Decimal((item === null || item === void 0 || (_item$deposit = item.deposit) === null || _item$deposit === void 0 ? void 0 : _item$deposit.total) || 0);
      // 将协议数据去重合并
      item === null || item === void 0 || (_item$deposit2 = item.deposit) === null || _item$deposit2 === void 0 || (_item$deposit2 = _item$deposit2.protocols) === null || _item$deposit2 === void 0 || _item$deposit2.forEach(function (protocol) {
        if (protocols.findIndex(function (p) {
          return p.id === protocol.id;
        }) === -1) {
          protocols.push(protocol);
        }
      });
      return sum.plus(cartItemTotalPrice);
    }
    return sum;
  }, new Decimal(0));
  if (hasDeposit) {
    return {
      total: total.toFixed(2),
      protocols: protocols,
      hasDeposit: hasDeposit
    };
  }
  return undefined;
};