// const chapter = [
//     {
//         level: 1,
//         id: 1,
//         name: '第一卷',
//     },
//     {
//         level: 2,
//         id: 2,
//         name: '第一章',
//     },
//     {
//         level: 3,
//         id: 12,
//         name: '第一节',
//     },
//     {
//         level: 2,
//         id: 3,
//         name: '第二章',
//     },
//     {
//         level: 2,
//         id: 4,
//         name: '第三章',
//     },
//     {
//         level: 1,
//         id: 5,
//         name: '第二卷',
//     },
//     {
//         level: 2,
//         id: 6,
//         name: '第一章',
//     },
//     {
//         level: 2,
//         id: 7,
//         name: '第二章',
//     },
//     {
//         level: 2,
//         id: 8,
//         name: '第三章',
//     },
//     {
//         level: 1,
//         id: 9,
//         name: '第三卷',
//     },
//     {
//         level: 2,
//         id: 10,
//         name: '第一章',
//     },
//     {
//         level: 2,
//         id: 11,
//         name: '第二章',
//     },
// ]
//
// function buildTree(chapters) {
//     const tree = [];
//     let currentVolume = null;
//
//     chapters.forEach(chapter => {
//         if (chapter.level === 1) {
//             // Create a new volume node
//             currentVolume = {
//                 ...chapter,
//                 children: []
//             };
//             tree.push(currentVolume);
//         } else if (chapter.level === 2 && currentVolume) {
//             // Add chapter to the current volume's children
//             currentVolume.children.push(chapter);
//         }
//     });
//
//     return tree;
// }
//
// const chapterTree = buildTree(chapter);
//
// console.log(JSON.stringify(chapterTree, null, 2));











// =================================================


function buildTree(data) {
    const nodeMap = new Map();
    const tree = [];
    
    // 初始化节点映射
    data.forEach(node => {
        // 确保每个节点都有 children 属性
        node.children = [];
        nodeMap.set(node.id, node);
    });
    
    // 构建树
    data.forEach(node => {
        if (node.parent_id !== null) {
            // 确保 id 和 parent_id 类型一致
            const parentNode = nodeMap.get(Number(node.parent_id));
            if (parentNode) {
                parentNode.children.push(node);
            }
        } else {
            // 顶层节点
            tree.push(node);
        }
    });
    
    return tree;
}

// 示例数据
const data = [
    {"id":103282,"name":"封面","level":0,"order_id":"b5c723069afad903d9410a1b87ee430d","parent_id":null,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/b5c723069afad903d9410a1b87ee430d.html"},
    {"id":103283,"name":"主目录","level":0,"order_id":"d2ae72f833f4622b4dad008d962dca63","parent_id":null,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/d2ae72f833f4622b4dad008d962dca63.html"},
    {"id":103284,"name":"史记","level":0,"order_id":"7c95352994901b619b32372054b2ad9d","parent_id":null,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/7c95352994901b619b32372054b2ad9d.html"},
    {"id":103285,"name":"五帝本纪第一","level":1,"order_id":"8f528e29556ad5246cf6c972c381bbed","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/8f528e29556ad5246cf6c972c381bbed.html"},
    {"id":103286,"name":"夏本纪第二","level":1,"order_id":"601b466b63d71a0bf787528254581282","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/601b466b63d71a0bf787528254581282.html"},
    {"id":103287,"name":"殷本纪第三","level":1,"order_id":"798fc04674f31ceae6c4f4d5b3b9f6db","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/798fc04674f31ceae6c4f4d5b3b9f6db.html"},
    {"id":103288,"name":"周本纪第四","level":1,"order_id":"8fa943845104b4891a1bf1191c2e2414","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/8fa943845104b4891a1bf1191c2e2414.html"},
    {"id":103289,"name":"秦本纪第五","level":1,"order_id":"f0371fc303cd35ffe95c4201f7073a91","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/f0371fc303cd35ffe95c4201f7073a91.html"},
    {"id":103290,"name":"秦始皇本纪第六","level":1,"order_id":"9af7c7db6c4ce70d6c37b47dffbec21f","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/9af7c7db6c4ce70d6c37b47dffbec21f.html"},
    {"id":103291,"name":"项羽本纪第七","level":1,"order_id":"297ee4d17393155dc0e989a78136984a","parent_id":103284,"path":"./base_files/1a7c3ccc61a0c00998d588971ee4e567/Text/297ee4d17393155dc0e989a78136984a.html"},
];

// 构建树并输出
const tree = buildTree(data);
console.log(JSON.stringify(tree, null, 2));