@atlaskit/tree/dist/esm/utils/mutateTree.js

A React Component for displaying expandable and sortable tree hierarchies

import _defineProperty from "@babel/runtime/helpers/defineProperty";
function ownKeys(object, enumerableOnly) { var keys = Object.keys(object); if (Object.getOwnPropertySymbols) { var symbols = Object.getOwnPropertySymbols(object); 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 = null != arguments[i] ? arguments[i] : {}; i % 2 ? ownKeys(Object(source), !0).forEach(function (key) { _defineProperty(target, key, source[key]); }) : Object.getOwnPropertyDescriptors ? Object.defineProperties(target, Object.getOwnPropertyDescriptors(source)) : ownKeys(Object(source)).forEach(function (key) { Object.defineProperty(target, key, Object.getOwnPropertyDescriptor(source, key)); }); } return target; }
/*
  Changes the tree data structure with minimal reference changes.
 */

export var mutateTree = function mutateTree(tree, itemId, mutation) {
  var itemToChange = tree.items[itemId];
  if (!itemToChange) {
    // Item not found
    return tree;
  }
  // Returning a clone of the tree structure and overwriting the field coming in mutation
  return {
    // rootId should not change
    rootId: tree.rootId,
    items: _objectSpread(_objectSpread({}, tree.items), {}, _defineProperty({}, itemId, _objectSpread(_objectSpread({}, itemToChange), mutation)))
  };
};