jiaojiu/node_modules/vant/es/sku/utils/sku-helper.js

import _extends from "@babel/runtime/helpers/esm/extends";
import { UNSELECTED_SKU_VALUE_ID } from '../constants';
/*
  normalize sku tree

  [
    {
      count: 2,
      k: "品种", // 规格名称 skuKeyName
      k_id: "1200", // skuKeyId
      k_s: "s1" // skuKeyStr
      v: [ // skuValues
        { // skuValue
          id: "1201", // skuValueId
          name: "萌" // 具体的规格值 skuValueName
        }, {
          id: "973",
          name: "帅"
        }
      ]
    },
    ...
  ]
                |
                v
  {
    s1: [{
      id: "1201",
      name: "萌"
    }, {
      id: "973",
      name: "帅"
    }],
    ...
  }
 */

export var normalizeSkuTree = function normalizeSkuTree(skuTree) {
  var normalizedTree = {};
  skuTree.forEach(function (treeItem) {
    normalizedTree[treeItem.k_s] = treeItem.v;
  });
  return normalizedTree;
};
export var normalizePropList = function normalizePropList(propList) {
  var normalizedProp = {};
  propList.forEach(function (item) {
    var itemObj = {};
    item.v.forEach(function (it) {
      itemObj[it.id] = it;
    });
    normalizedProp[item.k_id] = itemObj;
  });
  return normalizedProp;
}; // 判断是否所有的sku都已经选中

export var isAllSelected = function isAllSelected(skuTree, selectedSku) {
  // 筛选selectedSku对象中key值不为空的值
  var selected = Object.keys(selectedSku).filter(function (skuKeyStr) {
    return selectedSku[skuKeyStr] !== UNSELECTED_SKU_VALUE_ID;
  });
  return skuTree.length === selected.length;
}; // 根据已选择的 sku 获取 skuComb

export var getSkuComb = function getSkuComb(skuList, selectedSku) {
  var skuComb = skuList.filter(function (item) {
    return Object.keys(selectedSku).every(function (skuKeyStr) {
      return String(item[skuKeyStr]) === String(selectedSku[skuKeyStr]);
    });
  });
  return skuComb[0];
}; // 获取已选择的sku名称

export var getSelectedSkuValues = function getSelectedSkuValues(skuTree, selectedSku) {
  var normalizedTree = normalizeSkuTree(skuTree);
  return Object.keys(selectedSku).reduce(function (selectedValues, skuKeyStr) {
    var skuValues = normalizedTree[skuKeyStr];
    var skuValueId = selectedSku[skuKeyStr];

    if (skuValueId !== UNSELECTED_SKU_VALUE_ID) {
      var skuValue = skuValues.filter(function (value) {
        return value.id === skuValueId;
      })[0];
      skuValue && selectedValues.push(skuValue);
    }

    return selectedValues;
  }, []);
}; // 判断sku是否可选

export var isSkuChoosable = function isSkuChoosable(skuList, selectedSku, skuToChoose) {
  var _extends2;

  var key = skuToChoose.key,
      valueId = skuToChoose.valueId; // 先假设sku已选中，拼入已选中sku对象中

  var matchedSku = _extends({}, selectedSku, (_extends2 = {}, _extends2[key] = valueId, _extends2)); // 再判断剩余sku是否全部不可选，若不可选则当前sku不可选中


  var skusToCheck = Object.keys(matchedSku).filter(function (skuKey) {
    return matchedSku[skuKey] !== UNSELECTED_SKU_VALUE_ID;
  });
  var filteredSku = skuList.filter(function (sku) {
    return skusToCheck.every(function (skuKey) {
      return String(matchedSku[skuKey]) === String(sku[skuKey]);
    });
  });
  var stock = filteredSku.reduce(function (total, sku) {
    total += sku.stock_num;
    return total;
  }, 0);
  return stock > 0;
};
export var getSelectedPropValues = function getSelectedPropValues(propList, selectedProp) {
  var normalizeProp = normalizePropList(propList);
  return Object.keys(selectedProp).reduce(function (acc, cur) {
    selectedProp[cur].forEach(function (it) {
      acc.push(_extends({}, normalizeProp[cur][it]));
    });
    return acc;
  }, []);
};
export var getSelectedProperties = function getSelectedProperties(propList, selectedProp) {
  var list = [];
  (propList || []).forEach(function (prop) {
    if (selectedProp[prop.k_id] && selectedProp[prop.k_id].length > 0) {
      var v = [];
      prop.v.forEach(function (it) {
        if (selectedProp[prop.k_id].indexOf(it.id) > -1) {
          v.push(_extends({}, it));
        }
      });
      list.push(_extends({}, prop, {
        v: v
      }));
    }
  });
  return list;
};
export default {
  normalizeSkuTree: normalizeSkuTree,
  getSkuComb: getSkuComb,
  getSelectedSkuValues: getSelectedSkuValues,
  isAllSelected: isAllSelected,
  isSkuChoosable: isSkuChoosable,
  getSelectedPropValues: getSelectedPropValues,
  getSelectedProperties: getSelectedProperties
};