如何在只有一个对象而不是列表的情况下使用物料树

// 假设你有一个单独的对象
const singleObject = {
  id: 1,
  name: 'Root',
  parentId: null,
  children: [
    {
      id: 2,
      name: 'Child1',
      parentId: 1,
      children: []
    },
    {
      id: 3,
      name: 'Child2',
      parentId: 1,
      children: [
        {
          id: 4,
          name: 'Grandchild1',
          parentId: 3,
          children: []
        }
      ]
    }
  ]
};

// 将单个对象转换为物料树
function convertToTree(obj) {
  const tree = [];
  const map = {};

  // 初始化map
  function initMap(node) {
    map[node.id] = { ...node, children: [] };
    if (node.children) {
      node.children.forEach(child => initMap(child));
    }
  }

  // 构建树
  function buildTree(node) {
    const treeNode = map[node.id];
    if (treeNode) {
      treeNode.children = treeNode.children.map(child => buildTree(child));
      tree.push(treeNode);
    }
  }

  initMap(obj);
  buildTree(obj);

  return tree;
}

const tree = convertToTree(singleObject);
console.log(JSON.stringify(tree, null, 2));