novel-site/book.html at main · xingzihai/novel-site · GitHub

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<!DOCTYPE html>
<html lang="zh-CN">
<head>
  <meta charset="UTF-8">
  <meta name="viewport" content="width=device-width, initial-scale=1.0, viewport-fit=cover">
  <title>作品详情</title>
  <meta name="description" content="">

  <!-- P3修复：DNS预解析和预连接 -->
  <link rel="preconnect" href="https://github.com" crossorigin>
  <link rel="dns-prefetch" href="https://github.com">

  <link rel="stylesheet" href="/style.css">
  <link rel="manifest" href="/manifest.json">
  <meta name="theme-color" content="#d4a574">
</head>
<body>
  <div class="navbar">
    <h1><a href="/">📚 我的书架</a></h1>
    <nav>
      <a href="https://github.com/xingzihai/novel-site" target="_blank" rel="noopener" title="GitHub">GitHub</a>
      <a href="/admin.html">管理</a>
      <button class="theme-toggle" onclick="toggleTheme()" title="切换主题">🌙</button>
    </nav>
  </div>
  <div class="container">
    <div class="breadcrumb"><a href="/">书架</a><span>›</span><span id="bc-title">加载中...</span></div>
    <div id="content" class="loading">加载中...</div>
  </div>
  <script>
    const THEMES = ['light','dark','green','sepia','blue'];
    const THEME_ICONS = {'light':'🌙','dark':'☀️','green':'🍃','sepia':'📜','blue':'💧'};
    const savedTheme = localStorage.getItem('theme') || 'light';
    document.documentElement.setAttribute('data-theme', savedTheme);
    updateThemeBtn();
    function toggleTheme() {
      const current = document.documentElement.getAttribute('data-theme');
      const idx = THEMES.indexOf(current);
      const next = THEMES[(idx + 1) % THEMES.length];
      document.documentElement.setAttribute('data-theme', next);
      localStorage.setItem('theme', next);
      updateThemeBtn();
    }
    function updateThemeBtn() {
      const btn = document.querySelector('.theme-toggle');
      const t = document.documentElement.getAttribute('data-theme');
      btn.textContent = THEME_ICONS[t] || '🌙';
    }

    const bookId = new URLSearchParams(location.search).get('id');
    let allChapters = [];
    if (!bookId || !/^\d+$/.test(bookId)) {
      document.getElementById('content').innerHTML = '<div class="msg msg-error">无效的书籍ID</div>';
    } else {
      loadBook();
    }

    // 加载站点设置
    fetch('/api/settings').then(r => r.json()).then(d => {
      const s = d.settings || {};
      if (s.site_name) document.querySelector('.navbar h1 a').textContent = '📚 ' + s.site_name;
    }).catch(() => {});

    // PWA Service Worker
    if ('serviceWorker' in navigator) {
      navigator.serviceWorker.register('/sw.js').catch(() => {});
    }

    async function loadBook() {
      const el = document.getElementById('content');
      try {
        const res = await fetch(`/api/books/${bookId}`);
        if (!res.ok) throw new Error(res.status === 404 ? '书籍不存在' : '加载失败');
        const data = await res.json();
        const b = data.book;
        const chapters = data.chapters || [];
        allChapters = chapters;

        document.title = esc(b.title) + ' - 我的书架';
        document.querySelector('meta[name="description"]').content = b.description || b.title;
        document.getElementById('bc-title').textContent = b.title;

        const tagsHtml = (b.tags || []).map(t => `<span class="tag-pill" style="background:${esc(t.color)}22;color:${esc(t.color)}">${esc(t.name)}</span>`).join('');
        const tagsBlock = tagsHtml ? `<div class="book-tags">${tagsHtml}</div>` : '';

        const uploaderHtml = b.uploader ? `<div class="uploader" style="font-size:13px;color:var(--text-light);margin-top:4px">${b.uploader_avatar ? '<img src="'+esc(b.uploader_avatar)+'" style="width:16px;height:16px;border-radius:50%;vertical-align:middle;margin-right:3px">' : ''}上传：${esc(b.uploader)}</div>` : '';

        let html;
        if (b.cover_key) {
          html = `
            <div class="book-header">
              <div class="book-header-with-cover">
                <img class="book-cover-img" src="/api/covers/${b.id}" alt="${esc(b.title)}">
                <div class="book-info">
                  <h2>${esc(b.title)}</h2>
                  ${b.author ? `<div class="author">作者：${esc(b.author)}</div>` : ''}
                  ${uploaderHtml}
                  ${b.description ? `<div class="desc">${cleanDesc(b.description)}</div>` : ''}
                  ${tagsBlock}
                </div>
              </div>
            </div>
          `;
        } else {
          html = `
            <div class="book-header">
              <h2>${esc(b.title)}</h2>
              ${b.author ? `<div class="author">作者：${esc(b.author)}</div>` : ''}
              ${uploaderHtml}
              ${b.description ? `<div class="desc">${cleanDesc(b.description)}</div>` : ''}
              ${tagsBlock}
            </div>
          `;
        }
        if (chapters.length > 0) {
          html += `<div class="search-bar" style="margin-top:16px;margin-bottom:0"><input type="text" id="chapter-search" placeholder="搜索章节标题..." autocomplete="off"><button onclick="filterChapters()">搜索</button></div>`;
        }
        if (chapters.length === 0) {
          html += '<div class="empty"><p>暂无章节</p></div>';
        } else {
          // P2修复：大量章节时分页加载，每页50章
          const CHAPTERS_PER_PAGE = 50;
          const needsPagination = chapters.length > CHAPTERS_PER_PAGE;

          html += '<ul class="chapter-list" id="chapter-list">';
          // 首次只渲染第一页
          const initialChapters = needsPagination ? chapters.slice(0, CHAPTERS_PER_PAGE) : chapters;
          html += initialChapters.map(c => `
            <li>
              <a href="/read.html?id=${c.id}">
                <span class="chapter-title">${esc(c.title)}</span>
                <span class="chapter-meta">${c.word_count} 字</span>
              </a>
            </li>
          `).join('');
          html += '</ul>';

          // 分页控制
          if (needsPagination) {
            const totalPages = Math.ceil(chapters.length / CHAPTERS_PER_PAGE);
            html += `<div class="chapter-pagination" id="chapter-pagination" data-page="1" data-per-page="${CHAPTERS_PER_PAGE}" data-total="${chapters.length}">
              <button id="ch-prev" disabled>上一页</button>
              <span class="page-info">第 <span id="ch-current">1</span> / ${totalPages} 页（共 ${chapters.length} 章）</span>
              <button id="ch-next">下一页</button>
            </div>`;
          }

          html += `<div style="margin-top:20px;text-align:center"><a href="#" id="export-link" style="font-size:13px;color:var(--text-light);text-decoration:none;border-bottom:1px dashed var(--text-light);padding-bottom:1px">导出全书 TXT</a></div>`;
        }

        // 书签列表
        const bookmarks = getBookmarks(bookId);
        if (bookmarks.length > 0) {
          html += `<div style="margin-top:24px"><h3 style="font-size:16px;margin-bottom:12px;color:var(--text)">🔖 我的书签（${bookmarks.length}）</h3>`;
          html += '<ul class="chapter-list">' + bookmarks.sort((a,b) => b.time - a.time).map(bm => `
            <li>
              <a href="/read.html?id=${bm.chapterId}">
                <span class="chapter-title">${esc(bm.chapterTitle)}</span>
                <span class="chapter-meta">${formatTimeAgo(bm.time)}</span>
              </a>
            </li>
          `).join('') + '</ul></div>';
        }

        el.innerHTML = html;

        // 安全绑定导出事件（避免onclick中拼接字符串）
        const exportLink = document.getElementById('export-link');
        if (exportLink) {
          exportLink.addEventListener('click', (e) => { e.preventDefault(); exportBook(b.id, b.title, b.author); });
        }

        // P2修复：绑定章节分页事件
        bindChapterPagination();
      } catch (e) {
        el.innerHTML = `<div class="msg msg-error">${esc(e.message)}</div>`;
      }
    }
    function esc(s) { const d = document.createElement('div'); d.textContent = s || ''; return d.innerHTML; }
    function cleanDesc(s) {
      if (!s) return '';
      if (!/<[a-z][\s\S]*>/i.test(s)) return esc(s);
      const doc = new DOMParser().parseFromString('<body>' + s + '</body>', 'text/html').body;
      const parts = [];
      doc.querySelectorAll('p, div, li').forEach(b => { const t = b.textContent.trim(); if (t) parts.push(esc(t)); });
      return parts.length > 0 ? parts.join('<br>') : esc(doc.textContent.trim());
    }

    function getBookmarks(bookId) {
      try { return JSON.parse(localStorage.getItem(`bookmarks_${bookId}`)) || []; }
      catch { return []; }
    }
    function formatTimeAgo(ts) {
      const diff = Date.now() - ts;
      const min = Math.floor(diff / 60000);
      if (min < 1) return '刚刚';
      if (min < 60) return min + '分钟前';
      const hr = Math.floor(min / 60);
      if (hr < 24) return hr + '小时前';
      return Math.floor(hr / 24) + '天前';
    }

    function filterChapters() {
      const input = document.getElementById('chapter-search');
      if (!input) return;
      const q = input.value.trim().toLowerCase();
      const listEl = document.querySelector('.chapter-list');
      if (!listEl) return;
      const filtered = q ? allChapters.filter(c => c.title.toLowerCase().includes(q)) : allChapters;
      if (filtered.length === 0) {
        listEl.innerHTML = '<li style="padding:16px;text-align:center;color:var(--text-light)">没有匹配的章节</li>';
      } else {
        listEl.innerHTML = filtered.map(c => `
          <li><a href="/read.html?id=${c.id}">
            <span class="chapter-title">${highlightMatch(esc(c.title), q)}</span>
            <span class="chapter-meta">${c.word_count} 字</span>
          </a></li>
        `).join('');
      }
    }
    function highlightMatch(text, q) {
      if (!q) return text;
      const re = new RegExp(`(${q.replace(/[.*+?^${}()|[\]\\]/g,'\\$&')})`, 'gi');
      return text.replace(re, '<mark>$1</mark>');
    }
    // 绑定搜索事件（DOM加载后立即执行，避免竞态条件）
    function bindSearchEvents() {
      const searchInput = document.getElementById('chapter-search');
      if (searchInput) {
        searchInput.addEventListener('keydown', (e) => { if (e.key === 'Enter') filterChapters(); });
        searchInput.addEventListener('input', (e) => { if (!e.target.value.trim()) filterChapters(); });
      }
    }
    // 如果DOM已加载完成，立即绑定；否则等待DOMContentLoaded
    if (document.readyState === 'loading') {
      document.addEventListener('DOMContentLoaded', bindSearchEvents);
    } else {
      bindSearchEvents();
    }

    // P2修复：章节分页控制
    function bindChapterPagination() {
      const pagination = document.getElementById('chapter-pagination');
      if (!pagination) return;

      const prevBtn = document.getElementById('ch-prev');
      const nextBtn = document.getElementById('ch-next');
      const currentSpan = document.getElementById('ch-current');
      const perPage = parseInt(pagination.dataset.perPage);
      const total = parseInt(pagination.dataset.total);
      const totalPages = Math.ceil(total / perPage);

      prevBtn.addEventListener('click', () => {
        let page = parseInt(pagination.dataset.page);
        if (page > 1) {
          page--;
          renderChapterPage(page, perPage, total, totalPages);
          pagination.dataset.page = page;
          currentSpan.textContent = page;
          prevBtn.disabled = page === 1;
          nextBtn.disabled = false;
        }
      });

      nextBtn.addEventListener('click', () => {
        let page = parseInt(pagination.dataset.page);
        if (page < totalPages) {
          page++;
          renderChapterPage(page, perPage, total, totalPages);
          pagination.dataset.page = page;
          currentSpan.textContent = page;
          nextBtn.disabled = page === totalPages;
          prevBtn.disabled = false;
        }
      });
    }

    function renderChapterPage(page, perPage, total, totalPages) {
      const listEl = document.getElementById('chapter-list');
      if (!listEl) return;

      const start = (page - 1) * perPage;
      const end = Math.min(start + perPage, total);
      const pageChapters = allChapters.slice(start, end);

      listEl.innerHTML = pageChapters.map(c => `
        <li><a href="/read.html?id=${c.id}">
          <span class="chapter-title">${esc(c.title)}</span>
          <span class="chapter-meta">${c.word_count} 字</span>
        </a></li>
      `).join('');

      // 滚动到章节列表顶部
      listEl.scrollIntoView({ behavior: 'smooth', block: 'start' });
    }

    async function exportBook(bookId, title, author) {
      try {
        const res = await fetch(`/api/books/${bookId}`);
        const data = await res.json();
        const chapters = data.chapters || [];
        if (chapters.length === 0) return alert('没有章节可导出');

        // 使用流式处理避免大文件内存溢出
        const CHUNK_SIZE = 100; // 每次处理的章节数
        const sep = '\n\n' + '='.repeat(40) + '\n\n';
        const header = `《${title}》\n${author ? '作者：'+author+'\n' : ''}\n`;
        const BOM = '\uFEFF';

        // 创建可写流
        const chunks = [BOM + header];
        let processedCount = 0;

        // 分块处理章节，避免一次性加载所有内容到内存
        for (let i = 0; i < chapters.length; i += CHUNK_SIZE) {
          const batch = chapters.slice(i, i + CHUNK_SIZE);
          const batchPromises = batch.map(async (ch) => {
            const r = await fetch(`/api/chapters/${ch.id}`);
            const d = await r.json();
            return ch.title + '\n\n' + d.content;
          });
          const batchResults = await Promise.all(batchPromises);

          // 添加分隔符
          if (processedCount > 0) {
            chunks.push(sep);
          }
          chunks.push(...batchResults);
          processedCount += batchResults.length;

          // 让出主线程，保持UI响应
          await new Promise(resolve => setTimeout(resolve, 0));
        }

        // 使用 Blob 构造函数的分块模式，减少内存峰值
        const blob = new Blob(chunks, {type:'text/plain;charset=utf-8'});
        const url = URL.createObjectURL(blob);
        const a = document.createElement('a');
        a.href = url;
        a.download = (title + (author ? '_'+author : '') + '.txt').replace(/[<>:"/\\|?*]/g,'_');
        a.click();
        URL.revokeObjectURL(url);
      } catch (e) { alert('导出失败：'+e.message); }
    }
  </script>
</body>
</html>