do-element/lib/utils/array.js

Secondary encapsulation of basic element-ui

import "core-js/modules/es.array.slice.js";
import "core-js/modules/es.object.to-string.js";
import "core-js/modules/es.function.name.js";
import "core-js/modules/es.array.from.js";
import "core-js/modules/es.string.iterator.js";
import "core-js/modules/es.symbol.js";
import "core-js/modules/es.symbol.description.js";
import "core-js/modules/es.symbol.iterator.js";
import "core-js/modules/es.array.iterator.js";
import "core-js/modules/web.dom-collections.iterator.js";
import "core-js/modules/es.object.keys.js";
import "core-js/modules/es.array.filter.js";
import "core-js/modules/es.object.get-own-property-descriptor.js";
import "core-js/modules/web.dom-collections.for-each.js";
import "core-js/modules/es.object.get-own-property-descriptors.js";
import _defineProperty from "@babel/runtime/helpers/defineProperty";

function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); if (enumerableOnly) { symbols = symbols.filter(function (sym) { return Object.getOwnPropertyDescriptor(object, sym).enumerable; }); } keys.push.apply(keys, symbols); } return keys; }

function _objectSpread(target) { for (var i = 1; i < arguments.length; i++) { var source = arguments[i] != null ? arguments[i] : {}; if (i % 2) { ownKeys(Object(source), true).forEach(function (key) { _defineProperty(target, key, source[key]); }); } else if (Object.getOwnPropertyDescriptors) { Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)); } else { ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } } return target; }

function _createForOfIteratorHelper(o, allowArrayLike) { var it = typeof Symbol !== "undefined" && o[Symbol.iterator] || o["@@iterator"]; if (!it) { if (Array.isArray(o) || (it = _unsupportedIterableToArray(o)) || allowArrayLike && o && typeof o.length === "number") { if (it) o = it; var i = 0; var F = function F() {}; return { s: F, n: function n() { if (i >= o.length) return { done: true }; return { done: false, value: o[i++] }; }, e: function e(_e) { throw _e; }, f: F }; } throw new TypeError("Invalid attempt to iterate non-iterable instance.\nIn order to be iterable, non-array objects must have a [Symbol.iterator]() method."); } var normalCompletion = true, didErr = false, err; return { s: function s() { it = it.call(o); }, n: function n() { var step = it.next(); normalCompletion = step.done; return step; }, e: function e(_e2) { didErr = true; err = _e2; }, f: function f() { try { if (!normalCompletion && it.return != null) it.return(); } finally { if (didErr) throw err; } } }; }

function _unsupportedIterableToArray(o, minLen) { if (!o) return; if (typeof o === "string") return _arrayLikeToArray(o, minLen); var n = Object.prototype.toString.call(o).slice(8, -1); if (n === "Object" && o.constructor) n = o.constructor.name; if (n === "Map" || n === "Set") return Array.from(o); if (n === "Arguments" || /^(?:Ui|I)nt(?:8|16|32)(?:Clamped)?Array$/.test(n)) return _arrayLikeToArray(o, minLen); }

function _arrayLikeToArray(arr, len) { if (len == null || len > arr.length) len = arr.length; for (var i = 0, arr2 = new Array(len); i < len; i++) { arr2[i] = arr[i]; } return arr2; }

var defaultProps = {
  id: 'id',
  pid: 'pid',
  children: 'children'
}; // 数组转tree

export function arrayToTree(items) {
  var props = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : defaultProps;
  props.id = props.id || 'id';
  props.pid = props.pid || 'pid';
  props.children = props.children || 'children';
  var result = []; // 存放结果集

  var itemMap = {};

  var _iterator = _createForOfIteratorHelper(items),
      _step;

  try {
    for (_iterator.s(); !(_step = _iterator.n()).done;) {
      var item = _step.value;
      var id = item[props.id];
      var pid = item[props.pid];

      if (!itemMap[id]) {
        itemMap[id] = _defineProperty({}, props.children, []);
      }

      itemMap[id] = _objectSpread(_objectSpread({}, item), {}, _defineProperty({}, props.children, itemMap[id][props.children]));
      var treeItem = itemMap[id];

      if (!pid) {
        result.push(treeItem);
      } else {
        if (!itemMap[pid]) {
          itemMap[id] = _defineProperty({}, props.children, []);
        }

        itemMap[pid].children.push(treeItem);
      }
    }
  } catch (err) {
    _iterator.e(err);
  } finally {
    _iterator.f();
  }

  return result;
}