js读取gitbook书籍目录的md文件将里面的目录结构转成json结构

以下是一个简单的实现，假设目录结构如下：

- Introduction.md
- Chapter 1/
  - Section 1.1.md
  - Section 1.2.md
- Chapter 2/
  - Section 2.1.md
  - Section 2.2.md

代码如下：

const fs = require('fs');
const path = require('path');

const bookPath = path.join(__dirname, 'book');

function readDir(dirPath) {
  const dir = fs.readdirSync(dirPath);
  const result = [];
  for (let i = 0; i < dir.length; i++) {
    const filePath = path.join(dirPath, dir[i]);
    const stat = fs.statSync(filePath);
    if (stat.isDirectory()) {
      result.push({
        name: dir[i],
        type: 'folder',
        children: readDir(filePath),
      });
    } else {
      if (dir[i].endsWith('.md')) {
        result.push({
          name: dir[i].slice(0, -3),
          type: 'file',
        });
      }
    }
  }
  return result;
}

const book = readDir(bookPath);
console.log(JSON.stringify(book, null, 2));

输出结果如下：

[
  {
    "name": "Introduction",
    "type": "file"
  },
  {
    "name": "Chapter 1",
    "type": "folder",
    "children": [
      {
        "name": "Section 1.1",
        "type": "file"
      },
      {
        "name": "Section 1.2",
        "type": "file"
      }
    ]
  },
  {
    "name": "Chapter 2",
    "type": "folder",
    "children": [
      {
        "name": "Section 2.1",
        "type": "file"
      },
      {
        "name": "Section 2.2",
        "type": "file"
      }
    ]
  }
]