feat: fetch-novel builds an EPUB from any plugin; Kavita TOC fix

- scripts/load-plugins.js: shared plugin loader for the novel CLI scripts
- scripts/fetch-novel.js: download a novel via its plugin into a clean EPUB 3
- find-novel prints the plugin id/path for each match
- kavita 1.0.1: innermost TOC entry names the chapter

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

plugins/multi/kavita.ts

@@ -37,7 +37,7 @@ class KavitaPlugin implements Plugin.PluginBase {
   id = 'kavita';
   name = 'Kavita';
   icon = 'src/multi/kavita/icon.png';
-  version = '1.0.0';
+  version = '1.0.1';
   site = 'https://www.kavitareader.com';
 
   pluginSettings = {
@@ -166,10 +166,12 @@ class KavitaPlugin implements Plugin.PluginBase {
     for (const book of books) {
       const toc = await this.json<TocItem[]>(`Book/${book.id}/chapters`);
       const titles = new Map<number, string>();
+      // Innermost entry wins: a "Part"/"Contents" parent often shares its
+      // page with the first chapter below it.
       const walk = (items: TocItem[]) =>
         items.forEach(item => {
-          if (!titles.has(item.page)) titles.set(item.page, item.title);
           if (item.children?.length) walk(item.children);
+          if (!titles.has(item.page)) titles.set(item.page, item.title);
         });
       walk(toc);
 

scripts/fetch-novel.js

@@ -0,0 +1,178 @@
+// Download a whole novel through its plugin and write it as an EPUB 3 file.
+// Usage: node scripts/fetch-novel.js <plugin-id> <novel-path> <out-dir>
+// Prints the written file path as the last stdout line.
+import JSZip from 'jszip';
+import { load } from 'cheerio';
+import fs from 'fs';
+import path from 'path';
+import { loadPlugins, print, ROOT } from './load-plugins.js';
+
+// Be gentle with the source site: few parallel requests, retries with backoff.
+const CONCURRENCY = 3;
+const RETRIES = 4;
+
+const [pluginId, novelPath, outDir] = process.argv.slice(2);
+if (!pluginId || !novelPath || !outDir) {
+  console.error(
+    'Usage: node scripts/fetch-novel.js <plugin-id> <novel-path> <out-dir>',
+  );
+  process.exit(2);
+}
+
+const langs = fs
+  .readdirSync(path.join(ROOT, 'plugins'), { withFileTypes: true })
+  .filter(d => d.isDirectory() && d.name !== 'multisrc')
+  .map(d => d.name);
+const plugin = (await loadPlugins(langs)).find(p => p.id === pluginId);
+if (!plugin) throw new Error(`No plugin with id "${pluginId}"`);
+
+const retry = async (label, fn) => {
+  for (let attempt = 1; ; attempt++) {
+    try {
+      return await fn();
+    } catch (e) {
+      if (attempt >= RETRIES) throw new Error(`${label}: ${e.message}`);
+      await new Promise(r => setTimeout(r, 1000 * 2 ** attempt));
+    }
+  }
+};
+
+const novel = await retry('novel', () => plugin.parseNovel(novelPath));
+const chapters = novel.chapters || [];
+if (!chapters.length) throw new Error('Novel has no chapters');
+process.stderr.write(
+  `${novel.name}: ${chapters.length} chapters from ${plugin.name}\n`,
+);
+
+const esc = s =>
+  String(s ?? '').replace(
+    /[&<>"]/g,
+    c => ({ '&': '&amp;', '<': '&lt;', '>': '&gt;', '"': '&quot;' })[c],
+  );
+
+// Chapter HTML is tag soup; re-serialise it as well-formed XHTML without
+// scripts or remote resources (an EPUB must be self-contained).
+const toXhtml = html => {
+  const $ = load(html, null, false);
+  $('script, style, iframe, link, meta, img, video, audio, source').remove();
+  return $.xml();
+};
+
+const bodies = new Array(chapters.length);
+let done = 0;
+const queue = chapters.map((c, i) => i);
+await Promise.all(
+  Array.from({ length: CONCURRENCY }, async () => {
+    for (let i; (i = queue.shift()) !== undefined;) {
+      const html = await retry(chapters[i].name, () =>
+        plugin.parseChapter(chapters[i].path),
+      );
+      bodies[i] = toXhtml(html);
+      if (++done % 50 === 0 || done === chapters.length) {
+        process.stderr.write(`  ${done}/${chapters.length}\n`);
+      }
+    }
+  }),
+);
+
+const zip = new JSZip();
+zip.file('mimetype', 'application/epub+zip', { compression: 'STORE' });
+zip.file(
+  'META-INF/container.xml',
+  `<?xml version="1.0" encoding="UTF-8"?>
+<container version="1.0" xmlns="urn:oasis:names:tc:opendocument:xmlns:container">
+  <rootfiles><rootfile full-path="OEBPS/content.opf" media-type="application/oebps-package+xml"/></rootfiles>
+</container>`,
+);
+
+const page = (title, body) => `<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml" xmlns:epub="http://www.idpf.org/2007/ops" lang="en" xml:lang="en">
+<head><meta charset="UTF-8"/><title>${esc(title)}</title></head>
+<body>${body}</body>
+</html>`;
+
+const ids = chapters.map((_, i) => `ch${String(i + 1).padStart(4, '0')}`);
+chapters.forEach((c, i) => {
+  zip.file(
+    `OEBPS/${ids[i]}.xhtml`,
+    page(c.name, `<h2>${esc(c.name)}</h2>\n${bodies[i]}`),
+  );
+});
+
+const toc = chapters
+  .map((c, i) => `<li><a href="${ids[i]}.xhtml">${esc(c.name)}</a></li>`)
+  .join('\n');
+zip.file(
+  'OEBPS/nav.xhtml',
+  page('Contents', `<nav epub:type="toc"><ol>\n${toc}\n</ol></nav>`),
+);
+
+let cover = '';
+if (novel.cover && /^https?:/.test(novel.cover)) {
+  try {
+    const res = await fetch(novel.cover, { headers: { Referer: plugin.site } });
+    const type = (res.headers.get('content-type') || '').split(';')[0];
+    const ext = {
+      'image/jpeg': 'jpg',
+      'image/png': 'png',
+      'image/webp': 'webp',
+      'image/gif': 'gif',
+    }[type];
+    if (res.ok && ext) {
+      zip.file(`OEBPS/cover.${ext}`, Buffer.from(await res.arrayBuffer()));
+      cover = `<item id="cover" href="cover.${ext}" media-type="${type}" properties="cover-image"/>`;
+    }
+  } catch {
+    // A missing cover is not worth failing the book for.
+  }
+}
+
+const uid = `urn:lnreader:${plugin.id}:${novelPath}`;
+const subjects = (novel.genres || '')
+  .split(',')
+  .map(g => g.trim())
+  .filter(Boolean)
+  .map(g => `<dc:subject>${esc(g)}</dc:subject>`)
+  .join('\n    ');
+zip.file(
+  'OEBPS/content.opf',
+  `<?xml version="1.0" encoding="UTF-8"?>
+<package xmlns="http://www.idpf.org/2007/opf" version="3.0" unique-identifier="uid">
+  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
+    <dc:identifier id="uid">${esc(uid)}</dc:identifier>
+    <dc:title>${esc(novel.name)}</dc:title>
+    <dc:language>en</dc:language>
+    ${novel.author ? `<dc:creator>${esc(novel.author)}</dc:creator>` : ''}
+    ${novel.summary ? `<dc:description>${esc(novel.summary)}</dc:description>` : ''}
+    <dc:publisher>${esc(plugin.name)}</dc:publisher>
+    <dc:source>${esc(plugin.resolveUrl ? plugin.resolveUrl(novelPath, true) : plugin.site)}</dc:source>
+    ${subjects}
+    <meta property="dcterms:modified">${new Date().toISOString().replace(/\.\d+Z$/, 'Z')}</meta>
+  </metadata>
+  <manifest>
+    <item id="nav" href="nav.xhtml" media-type="application/xhtml+xml" properties="nav"/>
+    ${cover}
+    ${ids.map(id => `<item id="${id}" href="${id}.xhtml" media-type="application/xhtml+xml"/>`).join('\n    ')}
+  </manifest>
+  <spine>
+    ${ids.map(id => `<itemref idref="${id}"/>`).join('\n    ')}
+  </spine>
+</package>`,
+);
+
+fs.mkdirSync(outDir, { recursive: true });
+const file = path.join(
+  outDir,
+  `${novel.name.replace(/[/\\:*?"<>|]/g, '-')}.epub`,
+);
+fs.writeFileSync(
+  file,
+  await zip.generateAsync({
+    type: 'nodebuffer',
+    compression: 'DEFLATE',
+    mimeType: 'application/epub+zip',
+  }),
+);
+print(file);
+process.exit(0);

scripts/find-novel.js

@@ -1,20 +1,8 @@
 // Search every plugin of the given languages for a title and list the sources
 // that carry it. Usage: node scripts/find-novel.js "<title>" [lang...]
 // Languages are plugin folder names (default: english multi).
-import * as esbuild from 'esbuild';
-import { execFileSync } from 'child_process';
-import { createRequire } from 'module';
-import { fileURLToPath } from 'url';
-import path, { dirname } from 'path';
-import fs from 'fs';
-import os from 'os';
+import { loadPlugins, print } from './load-plugins.js';
 
-const require = createRequire(import.meta.url);
-// The shared fetch helper logs every request with its headers (credentials
-// included); keep that out of the output. Results go to stdout explicitly.
-const print = (...args) => process.stdout.write(args.join(' ') + '\n');
-console.log = () => {};
-const ROOT = path.resolve(dirname(fileURLToPath(import.meta.url)), '..');
 const TIMEOUT_MS = 20_000;
 const CONCURRENCY = 16;
 const PER_SOURCE = 3;
@@ -24,58 +12,18 @@ if (!term) {
   console.error('Usage: node scripts/find-novel.js "<title>" [lang...]');
   process.exit(2);
 }
-const langs = langArgs.length ? langArgs : ['english', 'multi'];
 
-// Multisrc plugins (Madara, NovelFire, ...) are generated, not committed.
-execFileSync('node', ['plugins/multisrc/generate-multisrc-plugins.js'], {
-  cwd: ROOT,
-  stdio: 'ignore',
-});
+const plugins = await loadPlugins(
+  langArgs.length ? langArgs : ['english', 'multi'],
+);
+process.stderr.write(`Searching ${plugins.length} sources for "${term}"...\n`);
 
-const entryPoints = langs.flatMap(lang => {
-  const dir = path.join(ROOT, 'plugins', lang);
-  if (!fs.existsSync(dir)) throw new Error(`No plugin folder: plugins/${lang}`);
-  return fs
-    .readdirSync(dir)
-    .filter(f => f.endsWith('.ts'))
-    .map(f => path.join(dir, f));
-});
-
-const outdir = fs.mkdtempSync(path.join(os.tmpdir(), 'find-novel-'));
-try {
-  const result = await esbuild.build({
-    entryPoints,
-    outdir,
-    bundle: true,
-    platform: 'node',
-    format: 'cjs',
-    target: 'node22',
-    outExtension: { '.js': '.cjs' },
-    logLevel: 'silent',
-    alias: {
-      '@libs': path.join(ROOT, 'src/libs'),
-      '@': path.join(ROOT, 'src'),
-    },
-  });
-  if (result.errors.length) throw new Error('Plugin bundling failed');
-
-  const bundles = fs
-    .readdirSync(outdir, { recursive: true })
-    .filter(f => f.endsWith('.cjs'))
-    .map(f => path.join(outdir, f));
-  process.stderr.write(
-    `Searching ${bundles.length} sources for "${term}"...\n`,
-  );
-
-  const hits = [];
-  let failed = 0;
-  const queue = [...bundles];
-  const worker = async () => {
-    for (let file; (file = queue.shift());) {
-      let plugin;
+const hits = [];
+let failed = 0;
+const queue = [...plugins];
+const worker = async () => {
+  for (let plugin; (plugin = queue.shift());) {
     try {
-        const mod = require(file);
-        plugin = mod.default ?? mod;
       const found = await Promise.race([
         plugin.searchNovels(term, 1),
         new Promise((_, reject) =>
@@ -86,41 +34,46 @@ try {
         const url = plugin.resolveUrl
           ? plugin.resolveUrl(novel.path, true)
           : new URL(novel.path, plugin.site).href;
-          hits.push({ source: plugin.name, name: novel.name, url });
+        hits.push({
+          source: plugin.name,
+          id: plugin.id,
+          name: novel.name,
+          path: novel.path,
+          url,
+        });
       }
     } catch {
       failed++;
     }
   }
-  };
-  await Promise.all(Array.from({ length: CONCURRENCY }, worker));
+};
+await Promise.all(Array.from({ length: CONCURRENCY }, worker));
 
-  // Keep titles containing every word of the query (quotes/punctuation ignored).
-  const norm = t =>
+// Keep titles containing every word of the query (quotes/punctuation ignored).
+const norm = t =>
   t
     .toLowerCase()
     .replace(/[’']/g, '')
     .replace(/[^a-z0-9]+/g, ' ')
     .trim();
-  const words = norm(term).split(' ');
-  const exact = norm(term);
-  const matches = hits.filter(h =>
+const words = norm(term).split(' ');
+const exact = norm(term);
+const matches = hits.filter(h =>
   words.every(w => norm(h.name).split(' ').includes(w)),
-  );
-  const rank = h => (norm(h.name) === exact ? 0 : 1);
-  matches.sort((a, b) => rank(a) - rank(b) || a.source.localeCompare(b.source));
+);
+const rank = h => (norm(h.name) === exact ? 0 : 1);
+matches.sort((a, b) => rank(a) - rank(b) || a.source.localeCompare(b.source));
 
-  for (const h of matches) {
+for (const h of matches) {
   print(
-      `${rank(h) === 0 ? '*' : ' '} ${h.source.padEnd(28)} ${h.name}\n  ${''.padEnd(28)} ${h.url}`,
+    `${rank(h) === 0 ? '*' : ' '} ${h.source.padEnd(28)} ${h.name}\n` +
+      `  ${''.padEnd(28)} ${h.url}\n` +
+      `  ${''.padEnd(28)} novel fetch ${h.id} ${h.path}`,
   );
-  }
-  process.stderr.write(
-    `${matches.length} matches (* = exact title), ${hits.length - matches.length} loose results hidden; ` +
-      `${bundles.length - failed}/${bundles.length} sources answered.\n`,
-  );
-} finally {
-  fs.rmSync(outdir, { recursive: true, force: true });
 }
+process.stderr.write(
+  `${matches.length} matches (* = exact title), ${hits.length - matches.length} loose results hidden; ` +
+    `${plugins.length - failed}/${plugins.length} sources answered.\n`,
+);
 // Keep-alive sockets can hold the event loop open; results are already printed.
 process.exit(0);

scripts/load-plugins.js

@@ -0,0 +1,68 @@
+// Load compiled plugin instances outside the app, for the novel CLI scripts.
+import * as esbuild from 'esbuild';
+import { execFileSync } from 'child_process';
+import { createRequire } from 'module';
+import { fileURLToPath } from 'url';
+import path, { dirname } from 'path';
+import fs from 'fs';
+import os from 'os';
+
+const require = createRequire(import.meta.url);
+export const ROOT = path.resolve(dirname(fileURLToPath(import.meta.url)), '..');
+
+// The shared fetch helper logs every request with its headers (credentials
+// included). Callers print their output explicitly with `print`.
+export const print = (...args) => process.stdout.write(args.join(' ') + '\n');
+console.log = () => undefined;
+
+/** Bundle and instantiate every plugin in the given language folders. */
+export async function loadPlugins(langs) {
+  // Multisrc plugins (Madara, NovelFire, ...) are generated, not committed.
+  execFileSync('node', ['plugins/multisrc/generate-multisrc-plugins.js'], {
+    cwd: ROOT,
+    stdio: 'ignore',
+  });
+
+  const entryPoints = langs.flatMap(lang => {
+    const dir = path.join(ROOT, 'plugins', lang);
+    if (!fs.existsSync(dir))
+      throw new Error(`No plugin folder: plugins/${lang}`);
+    return fs
+      .readdirSync(dir)
+      .filter(f => f.endsWith('.ts'))
+      .map(f => path.join(dir, f));
+  });
+
+  const outdir = fs.mkdtempSync(path.join(os.tmpdir(), 'novel-plugins-'));
+  try {
+    const result = await esbuild.build({
+      entryPoints,
+      outdir,
+      bundle: true,
+      platform: 'node',
+      format: 'cjs',
+      target: 'node22',
+      outExtension: { '.js': '.cjs' },
+      logLevel: 'silent',
+      alias: {
+        '@libs': path.join(ROOT, 'src/libs'),
+        '@': path.join(ROOT, 'src'),
+      },
+    });
+    if (result.errors.length) throw new Error('Plugin bundling failed');
+
+    const plugins = [];
+    for (const file of fs.readdirSync(outdir, { recursive: true })) {
+      if (!file.endsWith('.cjs')) continue;
+      try {
+        const mod = require(path.join(outdir, file));
+        plugins.push(mod.default ?? mod);
+      } catch {
+        // A plugin that throws on load is skipped, like a broken source in the app.
+      }
+    }
+    return plugins;
+  } finally {
+    fs.rmSync(outdir, { recursive: true, force: true });
+  }
+}