文件读取目录 转 antd 目录树

接口返回格式：

let pathList = [
    {isFolder: true, pathRel: "/文件夹", path: "D:/IndexRoot/abc/文件夹"},
    {isFolder: true, pathRel: "/文件夹2", path: "D:/IndexRoot/abc/文件夹2"},
]

转为 antd 文件目录的数据格式

  //['文件夹', 'a.txt']
  function add_item(p: string[], is_f: boolean, add_p: string[]) {
    if (p.length === 0) {
      return [];
    }
    let is_folder = true;
    if (p.length === 1) {
      is_folder = is_f;
    }
    let first_item = p.shift() || '';
    add_p.push(first_item);
    let temp: DataNode[] = [{
      title: first_item,
      key: add_p.join('/'),
      isLeaf: !is_folder,
      children: add_item(p, is_f, add_p),
    }];
    return temp;
  }
  // 同title的合并
  function merge_item(nodes: DataNode[]) {
    if (nodes.length <= 0) {
      return [];
    }
    let children: DataNode[] = [];
    for (let i = 0; i < nodes.length; i++) {
      let node = nodes[i]
      let index = findIndex(children, ['title', node.title]);
      if (index > -1) {
        children[index].children = children[index].children?.concat(node.children || [])
      } else {
        children.push({
          title: node.title,
          key: node.key,
          isLeaf: node.isLeaf,
          children: node.children,
        })
      }
    }
    for (let c = 0; c < children.length; c++) {
      children[c].children = merge_item(children[c].children || [])
    }
    return children
  }

  let node_list: DataNode[] = []
  for (let i = 0; i < pathList.length; i++) {
    let o = resFol.data.pathList[i];
    let names = o.pathRel.split('/');
    names.shift();
    let one = add_item(names, o.isFolder, [o.path.replace(o.pathRel, '')])[0];
    node_list = node_list.concat(one)
  }
  let all = merge_item(node_list);

上面的 all 就是antd 的格式了，类似如下：

const treeData: DataNode[] = [
  {
    title: 'parent 0',
    key: '0-0',
    children: [
      { title: 'leaf 0-0', key: '0-0-0', isLeaf: true },
      { title: 'leaf 0-1', key: '0-0-1', isLeaf: true },
    ],
  },
  {
    title: 'parent 1',
    key: '0-1',
    children: [
      { title: 'leaf 1-0', key: '0-1-0', isLeaf: false },
      { title: 'leaf 1-1', key: '0-1-1', isLeaf: true },
    ],
  },
];

最终的样子：