added endpoint for downloading from extensions

desktop/src/api/local/download.service.ts

@@ -0,0 +1,368 @@
+import { getConfig as loadConfig } from '../../shared/config.js';
+import { queryOne, queryAll, run } from '../../shared/database.js';
+import { getAnimeById } from '../anime/anime.service';
+import { getBookById } from '../books/books.service';
+import crypto from 'crypto';
+import fs from 'fs';
+import path from 'path';
+import { exec } from 'child_process';
+import { promisify } from 'util';
+import AdmZip from 'adm-zip';
+
+const execPromise = promisify(exec);
+
+const FFMPEG_PATH = 'D:\\ffmpeg\\bin\\ffmpeg.exe'; // Hardcoded como pediste
+
+type AnimeDownloadParams = {
+    anilistId: number;
+    episodeNumber: number;
+    streamUrl: string;
+    quality?: string;
+    subtitles?: Array<{ language: string; url: string }>;
+    chapters?: Array<{ title: string; start_time: number; end_time: number }>;
+};
+
+type BookDownloadParams = {
+    anilistId: number;
+    chapterNumber: number;
+    format: 'manga' | 'novel';
+    content?: string;
+    images?: Array<{ index: number; url: string }>;
+};
+
+async function ensureDirectory(dirPath: string) {
+    if (!fs.existsSync(dirPath)) {
+        fs.mkdirSync(dirPath, { recursive: true });
+    }
+}
+
+async function downloadFile(url: string, outputPath: string): Promise<void> {
+    const res = await fetch(url);
+    if (!res.ok) throw new Error(`HTTP_${res.status}`);
+
+    await ensureDirectory(path.dirname(outputPath));
+    const buf = Buffer.from(await res.arrayBuffer());
+    fs.writeFileSync(outputPath, buf);
+}
+
+async function getOrCreateEntry(
+    anilistId: number,
+    type: 'anime' | 'manga' | 'novels'
+): Promise<{ id: string; path: string; folderName: string }> {
+    const existing = await queryOne(
+        `SELECT id, path, folder_name FROM local_entries 
+         WHERE matched_id = ? AND matched_source = 'anilist' AND type = ?`,
+        [anilistId, type],
+        'local_library'
+    );
+
+    if (existing) {
+        return {
+            id: existing.id,
+            path: existing.path,
+            folderName: existing.folder_name
+        };
+    }
+
+    const metadata: any = type === 'anime'
+        ? await getAnimeById(anilistId)
+        : await getBookById(anilistId);
+
+    if (!metadata) {
+        throw new Error('METADATA_NOT_FOUND');
+    }
+
+    const config = loadConfig();
+    const basePath = config.library?.[type];
+
+    if (!basePath) {
+        throw new Error(`NO_LIBRARY_PATH_FOR_${type.toUpperCase()}`);
+    }
+
+    const title = metadata.title?.romaji || metadata.title?.english || `ID_${anilistId}`;
+    const safeName = title.replace(/[<>:"/\\|?*]/g, '_');
+    const folderPath = path.join(basePath, safeName);
+
+    await ensureDirectory(folderPath);
+
+    const entryId = crypto.createHash('sha1').update(folderPath).digest('hex');
+    const now = Date.now();
+
+    await run(
+        `INSERT INTO local_entries (id, type, path, folder_name, matched_id, matched_source, last_scan)
+         VALUES (?, ?, ?, ?, ?, 'anilist', ?)`,
+        [entryId, type, folderPath, safeName, anilistId, now],
+        'local_library'
+    );
+
+    return {
+        id: entryId,
+        path: folderPath,
+        folderName: safeName
+    };
+}
+
+export async function downloadAnimeEpisode(params: AnimeDownloadParams) {
+    const { anilistId, episodeNumber, streamUrl, quality, subtitles, chapters } = params;
+
+    const entry = await getOrCreateEntry(anilistId, 'anime');
+
+    const existingFile = await queryOne(
+        `SELECT id FROM local_files WHERE entry_id = ? AND unit_number = ?`,
+        [entry.id, episodeNumber],
+        'local_library'
+    );
+
+    if (existingFile) {
+        return {
+            status: 'ALREADY_EXISTS',
+            message: `Episode ${episodeNumber} already exists`,
+            entry_id: entry.id,
+            episode: episodeNumber
+        };
+    }
+
+    const outputFileName = `Episode_${episodeNumber.toString().padStart(2, '0')}.mkv`;
+    const outputPath = path.join(entry.path, outputFileName);
+    const tempDir = path.join(entry.path, '.temp');
+    await ensureDirectory(tempDir);
+
+    try {
+        let inputArgs: string[] = [];
+        let videoInput = streamUrl;
+
+        if (streamUrl.includes('.m3u8')) {
+            if (quality) {
+                const tempM3u8 = path.join(tempDir, 'stream.m3u8');
+                await downloadFile(streamUrl, tempM3u8);
+                const content = fs.readFileSync(tempM3u8, 'utf8');
+
+                const qualities = content.match(/RESOLUTION=\d+x(\d+)/g) || [];
+                const targetHeight = quality.replace('p', '');
+                const targetLine = content.split('\n').find(line =>
+                    line.includes(`RESOLUTION=`) && line.includes(`x${targetHeight}`)
+                );
+
+                if (targetLine) {
+                    const nextLine = content.split('\n')[content.split('\n').indexOf(targetLine) + 1];
+                    if (nextLine && !nextLine.startsWith('#')) {
+                        const baseUrl = streamUrl.substring(0, streamUrl.lastIndexOf('/') + 1);
+                        videoInput = nextLine.startsWith('http') ? nextLine : baseUrl + nextLine;
+                    }
+                }
+
+                fs.unlinkSync(tempM3u8);
+            }
+        }
+
+        inputArgs = ['-i', videoInput];
+
+        const subtitleFiles: string[] = [];
+        if (subtitles && subtitles.length > 0) {
+            for (let i = 0; i < subtitles.length; i++) {
+                const sub = subtitles[i];
+                const subPath = path.join(tempDir, `subtitle_${i}.${sub.url.endsWith('.vtt') ? 'vtt' : 'srt'}`);
+                await downloadFile(sub.url, subPath);
+                subtitleFiles.push(subPath);
+                inputArgs.push('-i', subPath);
+            }
+        }
+
+        let ffmpegArgs = [
+            ...inputArgs,
+            '-map', '0:v',
+            '-map', '0:a',
+            '-c:v', 'copy',
+            '-c:a', 'copy'
+        ];
+
+        for (let i = 0; i < subtitleFiles.length; i++) {
+            ffmpegArgs.push('-map', `${i + 1}:s`);
+            ffmpegArgs.push(`-metadata:s:s:${i}`, `language=${subtitles![i].language}`);
+        }
+
+        if (subtitleFiles.length > 0) {
+            ffmpegArgs.push('-c:s', 'copy');
+        }
+
+        if (chapters && chapters.length > 0) {
+            const metadataFile = path.join(tempDir, 'chapters.txt');
+            let chapterContent = ';FFMETADATA1\n';
+
+            for (const chapter of chapters) {
+                const startMs = Math.floor(chapter.start_time * 1000);
+                const endMs = Math.floor(chapter.end_time * 1000);
+
+                chapterContent += '[CHAPTER]\n';
+                chapterContent += `TIMEBASE=1/1000\n`;
+                chapterContent += `START=${startMs}\n`;
+                chapterContent += `END=${endMs}\n`;
+                chapterContent += `title=${chapter.title}\n`;
+            }
+
+            fs.writeFileSync(metadataFile, chapterContent);
+            ffmpegArgs.push('-i', metadataFile);
+            ffmpegArgs.push('-map_metadata', `${inputArgs.length / 2}`);
+        }
+
+        ffmpegArgs.push(outputPath);
+
+        const command = `${FFMPEG_PATH} ${ffmpegArgs.join(' ')}`;
+        await execPromise(command, { maxBuffer: 1024 * 1024 * 100 });
+
+        fs.rmSync(tempDir, { recursive: true, force: true });
+
+        const fileId = crypto.randomUUID();
+        await run(
+            `INSERT INTO local_files (id, entry_id, file_path, unit_number)
+             VALUES (?, ?, ?, ?)`,
+            [fileId, entry.id, outputPath, episodeNumber],
+            'local_library'
+        );
+
+        await run(
+            `UPDATE local_entries SET last_scan = ? WHERE id = ?`,
+            [Date.now(), entry.id],
+            'local_library'
+        );
+
+        return {
+            status: 'SUCCESS',
+            entry_id: entry.id,
+            file_id: fileId,
+            episode: episodeNumber,
+            path: outputPath
+        };
+
+    } catch (error: any) {
+        fs.rmSync(tempDir, { recursive: true, force: true });
+        if (fs.existsSync(outputPath)) {
+            fs.unlinkSync(outputPath);
+        }
+
+        const err = new Error('DOWNLOAD_FAILED');
+        (err as any).details = error.message;
+        throw err;
+    }
+}
+
+export async function downloadBookChapter(params: BookDownloadParams) {
+    const { anilistId, chapterNumber, format, content, images } = params;
+
+    const type = format === 'manga' ? 'manga' : 'novels';
+    const entry = await getOrCreateEntry(anilistId, type);
+
+    const existingFile = await queryOne(
+        `SELECT id FROM local_files WHERE entry_id = ? AND unit_number = ?`,
+        [entry.id, chapterNumber],
+        'local_library'
+    );
+
+    if (existingFile) {
+        return {
+            status: 'ALREADY_EXISTS',
+            message: `Chapter ${chapterNumber} already exists`,
+            entry_id: entry.id,
+            chapter: chapterNumber
+        };
+    }
+
+    try {
+        let outputPath: string;
+        let fileId: string;
+
+        if (format === 'manga') {
+            const chapterName = `Chapter_${chapterNumber.toString().padStart(3, '0')}.cbz`;
+            outputPath = path.join(entry.path, chapterName);
+
+            const zip = new AdmZip();
+            const sortedImages = images!.sort((a, b) => a.index - b.index);
+
+            for (const img of sortedImages) {
+                const res = await fetch(img.url);
+                if (!res.ok) throw new Error(`HTTP_${res.status}`);
+                const buf = Buffer.from(await res.arrayBuffer());
+
+                const ext = path.extname(new URL(img.url).pathname) || '.jpg';
+                const filename = `${img.index.toString().padStart(4, '0')}${ext}`;
+                zip.addFile(filename, buf);
+            }
+
+            zip.writeZip(outputPath);
+
+        } else {
+            const chapterName = `Chapter_${chapterNumber.toString().padStart(3, '0')}.epub`;
+            outputPath = path.join(entry.path, chapterName);
+
+            const zip = new AdmZip();
+
+            zip.addFile('mimetype', Buffer.from('application/epub+zip'), '', 0);
+
+            const containerXml = `<?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>`;
+            zip.addFile('META-INF/container.xml', Buffer.from(containerXml));
+
+            const contentOpf = `<?xml version="1.0" encoding="UTF-8"?>
+<package xmlns="http://www.idpf.org/2007/opf" version="3.0" unique-identifier="bookid">
+  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
+    <dc:title>Chapter ${chapterNumber}</dc:title>
+    <dc:identifier id="bookid">chapter-${anilistId}-${chapterNumber}</dc:identifier>
+    <dc:language>en</dc:language>
+  </metadata>
+  <manifest>
+    <item id="chapter" href="chapter.xhtml" media-type="application/xhtml+xml"/>
+  </manifest>
+  <spine>
+    <itemref idref="chapter"/>
+  </spine>
+</package>`;
+            zip.addFile('OEBPS/content.opf', Buffer.from(contentOpf));
+
+            const chapterXhtml = `<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <title>Chapter ${chapterNumber}</title>
+</head>
+<body>
+${content}
+</body>
+</html>`;
+            zip.addFile('OEBPS/chapter.xhtml', Buffer.from(chapterXhtml));
+
+            zip.writeZip(outputPath);
+        }
+
+        fileId = crypto.randomUUID();
+        await run(
+            `INSERT INTO local_files (id, entry_id, file_path, unit_number)
+             VALUES (?, ?, ?, ?)`,
+            [fileId, entry.id, outputPath, chapterNumber],
+            'local_library'
+        );
+
+        await run(
+            `UPDATE local_entries SET last_scan = ? WHERE id = ?`,
+            [Date.now(), entry.id],
+            'local_library'
+        );
+
+        return {
+            status: 'SUCCESS',
+            entry_id: entry.id,
+            file_id: fileId,
+            chapter: chapterNumber,
+            format,
+            path: outputPath
+        };
+
+    } catch (error: any) {
+        const err = new Error('DOWNLOAD_FAILED');
+        (err as any).details = error.message;
+        throw err;
+    }
+}

desktop/src/api/local/local.controller.ts

@@ -1,6 +1,7 @@
 import {FastifyReply, FastifyRequest} from 'fastify';
 import fs from 'fs';
 import * as service from './local.service';
+import * as downloadService from './download.service';
 
 type ScanQuery = {
     mode?: 'full' | 'incremental';
@@ -16,6 +17,33 @@ type MatchBody = {
     matched_id: number | null;
 };
 
+type DownloadAnimeBody = {
+    anilist_id: number;
+    episode_number: number;
+    stream_url: string;
+    quality?: string;
+    subtitles?: Array<{
+        language: string;
+        url: string;
+    }>;
+    chapters?: Array<{
+        title: string;
+        start_time: number;
+        end_time: number;
+    }>;
+};
+
+type DownloadBookBody = {
+    anilist_id: number;
+    chapter_number: number;
+    format: 'manga' | 'novel';
+    content?: string;
+    images?: Array<{
+        index: number;
+        url: string;
+    }>;
+};
+
 export async function scanLibrary(request: FastifyRequest<{ Querystring: ScanQuery }>, reply: FastifyReply) {
     try {
         const mode = request.query.mode || 'incremental';
@@ -183,3 +211,109 @@ export async function getPage(request: FastifyRequest, reply: FastifyReply) {
 
     return reply.status(400).send();
 }
+
+export async function downloadAnime(request: FastifyRequest<{ Body: DownloadAnimeBody }>, reply: FastifyReply) {
+    try {
+        const {
+            anilist_id,
+            episode_number,
+            stream_url,
+            quality,
+            subtitles,
+            chapters
+        } = request.body;
+
+        if (!anilist_id || !episode_number || !stream_url) {
+            return reply.status(400).send({
+                error: 'MISSING_REQUIRED_FIELDS',
+                required: ['anilist_id', 'episode_number', 'stream_url']
+            });
+        }
+
+        const result = await downloadService.downloadAnimeEpisode({
+            anilistId: anilist_id,
+            episodeNumber: episode_number,
+            streamUrl: stream_url,
+            quality,
+            subtitles,
+            chapters
+        });
+
+        if (result.status === 'ALREADY_EXISTS') {
+            return reply.status(409).send(result);
+        }
+
+        return result;
+    } catch (err: any) {
+        console.error('Error downloading anime:', err);
+
+        if (err.message === 'METADATA_NOT_FOUND') {
+            return reply.status(404).send({ error: 'ANIME_NOT_FOUND_IN_ANILIST' });
+        }
+
+        if (err.message === 'DOWNLOAD_FAILED') {
+            return reply.status(500).send({ error: 'DOWNLOAD_FAILED', details: err.details });
+        }
+
+        return reply.status(500).send({ error: 'FAILED_TO_DOWNLOAD_ANIME' });
+    }
+}
+
+export async function downloadBook(request: FastifyRequest<{ Body: DownloadBookBody }>, reply: FastifyReply) {
+    try {
+        const {
+            anilist_id,
+            chapter_number,
+            format,
+            content,
+            images
+        } = request.body;
+
+        if (!anilist_id || !chapter_number || !format) {
+            return reply.status(400).send({
+                error: 'MISSING_REQUIRED_FIELDS',
+                required: ['anilist_id', 'chapter_number', 'format']
+            });
+        }
+
+        if (format === 'novel' && !content) {
+            return reply.status(400).send({
+                error: 'MISSING_CONTENT',
+                message: 'content field is required for novels'
+            });
+        }
+
+        if (format === 'manga' && (!images || images.length === 0)) {
+            return reply.status(400).send({
+                error: 'MISSING_IMAGES',
+                message: 'images field is required for manga'
+            });
+        }
+
+        const result = await downloadService.downloadBookChapter({
+            anilistId: anilist_id,
+            chapterNumber: chapter_number,
+            format,
+            content,
+            images
+        });
+
+        if (result.status === 'ALREADY_EXISTS') {
+            return reply.status(409).send(result);
+        }
+
+        return result;
+    } catch (err: any) {
+        console.error('Error downloading book:', err);
+
+        if (err.message === 'METADATA_NOT_FOUND') {
+            return reply.status(404).send({ error: 'BOOK_NOT_FOUND_IN_ANILIST' });
+        }
+
+        if (err.message === 'DOWNLOAD_FAILED') {
+            return reply.status(500).send({ error: 'DOWNLOAD_FAILED', details: err.details });
+        }
+
+        return reply.status(500).send({ error: 'FAILED_TO_DOWNLOAD_BOOK' });
+    }
+}

desktop/src/api/local/local.routes.ts

@@ -10,6 +10,8 @@ async function localRoutes(fastify: FastifyInstance) {
     fastify.get('/library/:id/units', controller.getUnits);
     fastify.get('/library/:unitId/manifest', controller.getManifest);
     fastify.get('/library/:unitId/resource/:resId', controller.getPage);
+    fastify.post('/library/download/anime', controller.downloadAnime);
+    fastify.post('/library/download/book', controller.downloadBook);
 }
 
 export default localRoutes;

desktop/src/api/local/local.service.ts

@@ -7,7 +7,6 @@ import path from "path";
 import { getAnimeById, searchAnimeLocal } from "../anime/anime.service";
 import { getBookById, searchBooksAniList } from "../books/books.service";
 import AdmZip from 'adm-zip';
-import EPub from 'epub';
 
 const MANGA_IMAGE_EXTS = ['.jpg', '.jpeg', '.png', '.webp'];
 const MANGA_ARCHIVES = ['.cbz', '.cbr', '.zip'];
@@ -490,28 +489,10 @@ export async function getUnitResource(unitId: string, resId: string) {
     return null;
 }
 
-function parseEpubToHtml(filePath: string): Promise<string> {
-    return new Promise((resolve, reject) => {
-        const epub = new EPub(filePath);
 
-        epub.on('end', async () => {
-            let html = '';
-
-            for (const id of epub.flow.map(f => f.id)) {
-                const chapter = await new Promise<string>((res, rej) => {
-                    epub.getChapter(id, (err, text) => {
-                        if (err) rej(err);
-                        else res(text);
-                    });
-                });
-
-                html += `<section class="ln-chapter">${chapter}</section>`;
-            }
-
-            resolve(html);
-        });
-
-        epub.on('error', reject);
-        epub.parse();
-    });
+function parseEpubToHtml(filePath: string) {
+    const zip = new AdmZip(filePath);
+    const entry = zip.getEntry('OEBPS/chapter.xhtml');
+    if (!entry) throw new Error('CHAPTER_NOT_FOUND');
+    return entry.getData().toString('utf8');
 }

desktop/src/scripts/books/reader.js

@@ -187,8 +187,7 @@ async function loadChapter() {
 
         // Lógica específica para contenido LOCAL
         if (provider === 'local') {
-            const unitIndex = Number(currentChapterId); // En local el ID suele ser el índice
-            const unit = data.units[unitIndex];
+            const unit = data.units.find(u => String(u.id) === String(currentChapterId));
 
             if (!unit) {
                 reader.innerHTML = '<div class="loading-container"><span>Chapter not found (Local)</span></div>';
@@ -201,8 +200,12 @@ async function loadChapter() {
             reader.innerHTML = '';
 
             // Setup navegación manual para local (simple index +/- 1)
+            const unitIndex = data.units.findIndex(
+                u => String(u.id) === String(currentChapterId)
+            );
             setupLocalNavigation(unitIndex, data.units.length);
 
+
             if (manifest.type === 'manga') {
                 currentType = 'manga';
                 updateSettingsVisibility();

docker/src/api/local/download.service.ts

@@ -0,0 +1,368 @@
+import { getConfig as loadConfig } from '../../shared/config.js';
+import { queryOne, queryAll, run } from '../../shared/database.js';
+import { getAnimeById } from '../anime/anime.service';
+import { getBookById } from '../books/books.service';
+import crypto from 'crypto';
+import fs from 'fs';
+import path from 'path';
+import { exec } from 'child_process';
+import { promisify } from 'util';
+import AdmZip from 'adm-zip';
+
+const execPromise = promisify(exec);
+
+const FFMPEG_PATH = 'D:\\ffmpeg\\bin\\ffmpeg.exe'; // Hardcoded como pediste
+
+type AnimeDownloadParams = {
+    anilistId: number;
+    episodeNumber: number;
+    streamUrl: string;
+    quality?: string;
+    subtitles?: Array<{ language: string; url: string }>;
+    chapters?: Array<{ title: string; start_time: number; end_time: number }>;
+};
+
+type BookDownloadParams = {
+    anilistId: number;
+    chapterNumber: number;
+    format: 'manga' | 'novel';
+    content?: string;
+    images?: Array<{ index: number; url: string }>;
+};
+
+async function ensureDirectory(dirPath: string) {
+    if (!fs.existsSync(dirPath)) {
+        fs.mkdirSync(dirPath, { recursive: true });
+    }
+}
+
+async function downloadFile(url: string, outputPath: string): Promise<void> {
+    const res = await fetch(url);
+    if (!res.ok) throw new Error(`HTTP_${res.status}`);
+
+    await ensureDirectory(path.dirname(outputPath));
+    const buf = Buffer.from(await res.arrayBuffer());
+    fs.writeFileSync(outputPath, buf);
+}
+
+async function getOrCreateEntry(
+    anilistId: number,
+    type: 'anime' | 'manga' | 'novels'
+): Promise<{ id: string; path: string; folderName: string }> {
+    const existing = await queryOne(
+        `SELECT id, path, folder_name FROM local_entries 
+         WHERE matched_id = ? AND matched_source = 'anilist' AND type = ?`,
+        [anilistId, type],
+        'local_library'
+    );
+
+    if (existing) {
+        return {
+            id: existing.id,
+            path: existing.path,
+            folderName: existing.folder_name
+        };
+    }
+
+    const metadata: any = type === 'anime'
+        ? await getAnimeById(anilistId)
+        : await getBookById(anilistId);
+
+    if (!metadata) {
+        throw new Error('METADATA_NOT_FOUND');
+    }
+
+    const config = loadConfig();
+    const basePath = config.library?.[type];
+
+    if (!basePath) {
+        throw new Error(`NO_LIBRARY_PATH_FOR_${type.toUpperCase()}`);
+    }
+
+    const title = metadata.title?.romaji || metadata.title?.english || `ID_${anilistId}`;
+    const safeName = title.replace(/[<>:"/\\|?*]/g, '_');
+    const folderPath = path.join(basePath, safeName);
+
+    await ensureDirectory(folderPath);
+
+    const entryId = crypto.createHash('sha1').update(folderPath).digest('hex');
+    const now = Date.now();
+
+    await run(
+        `INSERT INTO local_entries (id, type, path, folder_name, matched_id, matched_source, last_scan)
+         VALUES (?, ?, ?, ?, ?, 'anilist', ?)`,
+        [entryId, type, folderPath, safeName, anilistId, now],
+        'local_library'
+    );
+
+    return {
+        id: entryId,
+        path: folderPath,
+        folderName: safeName
+    };
+}
+
+export async function downloadAnimeEpisode(params: AnimeDownloadParams) {
+    const { anilistId, episodeNumber, streamUrl, quality, subtitles, chapters } = params;
+
+    const entry = await getOrCreateEntry(anilistId, 'anime');
+
+    const existingFile = await queryOne(
+        `SELECT id FROM local_files WHERE entry_id = ? AND unit_number = ?`,
+        [entry.id, episodeNumber],
+        'local_library'
+    );
+
+    if (existingFile) {
+        return {
+            status: 'ALREADY_EXISTS',
+            message: `Episode ${episodeNumber} already exists`,
+            entry_id: entry.id,
+            episode: episodeNumber
+        };
+    }
+
+    const outputFileName = `Episode_${episodeNumber.toString().padStart(2, '0')}.mkv`;
+    const outputPath = path.join(entry.path, outputFileName);
+    const tempDir = path.join(entry.path, '.temp');
+    await ensureDirectory(tempDir);
+
+    try {
+        let inputArgs: string[] = [];
+        let videoInput = streamUrl;
+
+        if (streamUrl.includes('.m3u8')) {
+            if (quality) {
+                const tempM3u8 = path.join(tempDir, 'stream.m3u8');
+                await downloadFile(streamUrl, tempM3u8);
+                const content = fs.readFileSync(tempM3u8, 'utf8');
+
+                const qualities = content.match(/RESOLUTION=\d+x(\d+)/g) || [];
+                const targetHeight = quality.replace('p', '');
+                const targetLine = content.split('\n').find(line =>
+                    line.includes(`RESOLUTION=`) && line.includes(`x${targetHeight}`)
+                );
+
+                if (targetLine) {
+                    const nextLine = content.split('\n')[content.split('\n').indexOf(targetLine) + 1];
+                    if (nextLine && !nextLine.startsWith('#')) {
+                        const baseUrl = streamUrl.substring(0, streamUrl.lastIndexOf('/') + 1);
+                        videoInput = nextLine.startsWith('http') ? nextLine : baseUrl + nextLine;
+                    }
+                }
+
+                fs.unlinkSync(tempM3u8);
+            }
+        }
+
+        inputArgs = ['-i', videoInput];
+
+        const subtitleFiles: string[] = [];
+        if (subtitles && subtitles.length > 0) {
+            for (let i = 0; i < subtitles.length; i++) {
+                const sub = subtitles[i];
+                const subPath = path.join(tempDir, `subtitle_${i}.${sub.url.endsWith('.vtt') ? 'vtt' : 'srt'}`);
+                await downloadFile(sub.url, subPath);
+                subtitleFiles.push(subPath);
+                inputArgs.push('-i', subPath);
+            }
+        }
+
+        let ffmpegArgs = [
+            ...inputArgs,
+            '-map', '0:v',
+            '-map', '0:a',
+            '-c:v', 'copy',
+            '-c:a', 'copy'
+        ];
+
+        for (let i = 0; i < subtitleFiles.length; i++) {
+            ffmpegArgs.push('-map', `${i + 1}:s`);
+            ffmpegArgs.push(`-metadata:s:s:${i}`, `language=${subtitles![i].language}`);
+        }
+
+        if (subtitleFiles.length > 0) {
+            ffmpegArgs.push('-c:s', 'copy');
+        }
+
+        if (chapters && chapters.length > 0) {
+            const metadataFile = path.join(tempDir, 'chapters.txt');
+            let chapterContent = ';FFMETADATA1\n';
+
+            for (const chapter of chapters) {
+                const startMs = Math.floor(chapter.start_time * 1000);
+                const endMs = Math.floor(chapter.end_time * 1000);
+
+                chapterContent += '[CHAPTER]\n';
+                chapterContent += `TIMEBASE=1/1000\n`;
+                chapterContent += `START=${startMs}\n`;
+                chapterContent += `END=${endMs}\n`;
+                chapterContent += `title=${chapter.title}\n`;
+            }
+
+            fs.writeFileSync(metadataFile, chapterContent);
+            ffmpegArgs.push('-i', metadataFile);
+            ffmpegArgs.push('-map_metadata', `${inputArgs.length / 2}`);
+        }
+
+        ffmpegArgs.push(outputPath);
+
+        const command = `${FFMPEG_PATH} ${ffmpegArgs.join(' ')}`;
+        await execPromise(command, { maxBuffer: 1024 * 1024 * 100 });
+
+        fs.rmSync(tempDir, { recursive: true, force: true });
+
+        const fileId = crypto.randomUUID();
+        await run(
+            `INSERT INTO local_files (id, entry_id, file_path, unit_number)
+             VALUES (?, ?, ?, ?)`,
+            [fileId, entry.id, outputPath, episodeNumber],
+            'local_library'
+        );
+
+        await run(
+            `UPDATE local_entries SET last_scan = ? WHERE id = ?`,
+            [Date.now(), entry.id],
+            'local_library'
+        );
+
+        return {
+            status: 'SUCCESS',
+            entry_id: entry.id,
+            file_id: fileId,
+            episode: episodeNumber,
+            path: outputPath
+        };
+
+    } catch (error: any) {
+        fs.rmSync(tempDir, { recursive: true, force: true });
+        if (fs.existsSync(outputPath)) {
+            fs.unlinkSync(outputPath);
+        }
+
+        const err = new Error('DOWNLOAD_FAILED');
+        (err as any).details = error.message;
+        throw err;
+    }
+}
+
+export async function downloadBookChapter(params: BookDownloadParams) {
+    const { anilistId, chapterNumber, format, content, images } = params;
+
+    const type = format === 'manga' ? 'manga' : 'novels';
+    const entry = await getOrCreateEntry(anilistId, type);
+
+    const existingFile = await queryOne(
+        `SELECT id FROM local_files WHERE entry_id = ? AND unit_number = ?`,
+        [entry.id, chapterNumber],
+        'local_library'
+    );
+
+    if (existingFile) {
+        return {
+            status: 'ALREADY_EXISTS',
+            message: `Chapter ${chapterNumber} already exists`,
+            entry_id: entry.id,
+            chapter: chapterNumber
+        };
+    }
+
+    try {
+        let outputPath: string;
+        let fileId: string;
+
+        if (format === 'manga') {
+            const chapterName = `Chapter_${chapterNumber.toString().padStart(3, '0')}.cbz`;
+            outputPath = path.join(entry.path, chapterName);
+
+            const zip = new AdmZip();
+            const sortedImages = images!.sort((a, b) => a.index - b.index);
+
+            for (const img of sortedImages) {
+                const res = await fetch(img.url);
+                if (!res.ok) throw new Error(`HTTP_${res.status}`);
+                const buf = Buffer.from(await res.arrayBuffer());
+
+                const ext = path.extname(new URL(img.url).pathname) || '.jpg';
+                const filename = `${img.index.toString().padStart(4, '0')}${ext}`;
+                zip.addFile(filename, buf);
+            }
+
+            zip.writeZip(outputPath);
+
+        } else {
+            const chapterName = `Chapter_${chapterNumber.toString().padStart(3, '0')}.epub`;
+            outputPath = path.join(entry.path, chapterName);
+
+            const zip = new AdmZip();
+
+            zip.addFile('mimetype', Buffer.from('application/epub+zip'), '', 0);
+
+            const containerXml = `<?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>`;
+            zip.addFile('META-INF/container.xml', Buffer.from(containerXml));
+
+            const contentOpf = `<?xml version="1.0" encoding="UTF-8"?>
+<package xmlns="http://www.idpf.org/2007/opf" version="3.0" unique-identifier="bookid">
+  <metadata xmlns:dc="http://purl.org/dc/elements/1.1/">
+    <dc:title>Chapter ${chapterNumber}</dc:title>
+    <dc:identifier id="bookid">chapter-${anilistId}-${chapterNumber}</dc:identifier>
+    <dc:language>en</dc:language>
+  </metadata>
+  <manifest>
+    <item id="chapter" href="chapter.xhtml" media-type="application/xhtml+xml"/>
+  </manifest>
+  <spine>
+    <itemref idref="chapter"/>
+  </spine>
+</package>`;
+            zip.addFile('OEBPS/content.opf', Buffer.from(contentOpf));
+
+            const chapterXhtml = `<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE html>
+<html xmlns="http://www.w3.org/1999/xhtml">
+<head>
+  <title>Chapter ${chapterNumber}</title>
+</head>
+<body>
+${content}
+</body>
+</html>`;
+            zip.addFile('OEBPS/chapter.xhtml', Buffer.from(chapterXhtml));
+
+            zip.writeZip(outputPath);
+        }
+
+        fileId = crypto.randomUUID();
+        await run(
+            `INSERT INTO local_files (id, entry_id, file_path, unit_number)
+             VALUES (?, ?, ?, ?)`,
+            [fileId, entry.id, outputPath, chapterNumber],
+            'local_library'
+        );
+
+        await run(
+            `UPDATE local_entries SET last_scan = ? WHERE id = ?`,
+            [Date.now(), entry.id],
+            'local_library'
+        );
+
+        return {
+            status: 'SUCCESS',
+            entry_id: entry.id,
+            file_id: fileId,
+            chapter: chapterNumber,
+            format,
+            path: outputPath
+        };
+
+    } catch (error: any) {
+        const err = new Error('DOWNLOAD_FAILED');
+        (err as any).details = error.message;
+        throw err;
+    }
+}

docker/src/api/local/local.controller.ts

@@ -1,6 +1,7 @@
 import {FastifyReply, FastifyRequest} from 'fastify';
 import fs from 'fs';
 import * as service from './local.service';
+import * as downloadService from './download.service';
 
 type ScanQuery = {
     mode?: 'full' | 'incremental';
@@ -16,6 +17,33 @@ type MatchBody = {
     matched_id: number | null;
 };
 
+type DownloadAnimeBody = {
+    anilist_id: number;
+    episode_number: number;
+    stream_url: string;
+    quality?: string;
+    subtitles?: Array<{
+        language: string;
+        url: string;
+    }>;
+    chapters?: Array<{
+        title: string;
+        start_time: number;
+        end_time: number;
+    }>;
+};
+
+type DownloadBookBody = {
+    anilist_id: number;
+    chapter_number: number;
+    format: 'manga' | 'novel';
+    content?: string;
+    images?: Array<{
+        index: number;
+        url: string;
+    }>;
+};
+
 export async function scanLibrary(request: FastifyRequest<{ Querystring: ScanQuery }>, reply: FastifyReply) {
     try {
         const mode = request.query.mode || 'incremental';
@@ -183,3 +211,109 @@ export async function getPage(request: FastifyRequest, reply: FastifyReply) {
 
     return reply.status(400).send();
 }
+
+export async function downloadAnime(request: FastifyRequest<{ Body: DownloadAnimeBody }>, reply: FastifyReply) {
+    try {
+        const {
+            anilist_id,
+            episode_number,
+            stream_url,
+            quality,
+            subtitles,
+            chapters
+        } = request.body;
+
+        if (!anilist_id || !episode_number || !stream_url) {
+            return reply.status(400).send({
+                error: 'MISSING_REQUIRED_FIELDS',
+                required: ['anilist_id', 'episode_number', 'stream_url']
+            });
+        }
+
+        const result = await downloadService.downloadAnimeEpisode({
+            anilistId: anilist_id,
+            episodeNumber: episode_number,
+            streamUrl: stream_url,
+            quality,
+            subtitles,
+            chapters
+        });
+
+        if (result.status === 'ALREADY_EXISTS') {
+            return reply.status(409).send(result);
+        }
+
+        return result;
+    } catch (err: any) {
+        console.error('Error downloading anime:', err);
+
+        if (err.message === 'METADATA_NOT_FOUND') {
+            return reply.status(404).send({ error: 'ANIME_NOT_FOUND_IN_ANILIST' });
+        }
+
+        if (err.message === 'DOWNLOAD_FAILED') {
+            return reply.status(500).send({ error: 'DOWNLOAD_FAILED', details: err.details });
+        }
+
+        return reply.status(500).send({ error: 'FAILED_TO_DOWNLOAD_ANIME' });
+    }
+}
+
+export async function downloadBook(request: FastifyRequest<{ Body: DownloadBookBody }>, reply: FastifyReply) {
+    try {
+        const {
+            anilist_id,
+            chapter_number,
+            format,
+            content,
+            images
+        } = request.body;
+
+        if (!anilist_id || !chapter_number || !format) {
+            return reply.status(400).send({
+                error: 'MISSING_REQUIRED_FIELDS',
+                required: ['anilist_id', 'chapter_number', 'format']
+            });
+        }
+
+        if (format === 'novel' && !content) {
+            return reply.status(400).send({
+                error: 'MISSING_CONTENT',
+                message: 'content field is required for novels'
+            });
+        }
+
+        if (format === 'manga' && (!images || images.length === 0)) {
+            return reply.status(400).send({
+                error: 'MISSING_IMAGES',
+                message: 'images field is required for manga'
+            });
+        }
+
+        const result = await downloadService.downloadBookChapter({
+            anilistId: anilist_id,
+            chapterNumber: chapter_number,
+            format,
+            content,
+            images
+        });
+
+        if (result.status === 'ALREADY_EXISTS') {
+            return reply.status(409).send(result);
+        }
+
+        return result;
+    } catch (err: any) {
+        console.error('Error downloading book:', err);
+
+        if (err.message === 'METADATA_NOT_FOUND') {
+            return reply.status(404).send({ error: 'BOOK_NOT_FOUND_IN_ANILIST' });
+        }
+
+        if (err.message === 'DOWNLOAD_FAILED') {
+            return reply.status(500).send({ error: 'DOWNLOAD_FAILED', details: err.details });
+        }
+
+        return reply.status(500).send({ error: 'FAILED_TO_DOWNLOAD_BOOK' });
+    }
+}

docker/src/api/local/local.routes.ts

@@ -10,6 +10,8 @@ async function localRoutes(fastify: FastifyInstance) {
     fastify.get('/library/:id/units', controller.getUnits);
     fastify.get('/library/:unitId/manifest', controller.getManifest);
     fastify.get('/library/:unitId/resource/:resId', controller.getPage);
+    fastify.post('/library/download/anime', controller.downloadAnime);
+    fastify.post('/library/download/book', controller.downloadBook);
 }
 
 export default localRoutes;

docker/src/api/local/local.service.ts

@@ -7,7 +7,6 @@ import path from "path";
 import { getAnimeById, searchAnimeLocal } from "../anime/anime.service";
 import { getBookById, searchBooksAniList } from "../books/books.service";
 import AdmZip from 'adm-zip';
-import EPub from 'epub';
 
 const MANGA_IMAGE_EXTS = ['.jpg', '.jpeg', '.png', '.webp'];
 const MANGA_ARCHIVES = ['.cbz', '.cbr', '.zip'];
@@ -490,28 +489,10 @@ export async function getUnitResource(unitId: string, resId: string) {
     return null;
 }
 
-function parseEpubToHtml(filePath: string): Promise<string> {
-    return new Promise((resolve, reject) => {
-        const epub = new EPub(filePath);
 
-        epub.on('end', async () => {
-            let html = '';
-
-            for (const id of epub.flow.map(f => f.id)) {
-                const chapter = await new Promise<string>((res, rej) => {
-                    epub.getChapter(id, (err, text) => {
-                        if (err) rej(err);
-                        else res(text);
-                    });
-                });
-
-                html += `<section class="ln-chapter">${chapter}</section>`;
-            }
-
-            resolve(html);
-        });
-
-        epub.on('error', reject);
-        epub.parse();
-    });
+function parseEpubToHtml(filePath: string) {
+    const zip = new AdmZip(filePath);
+    const entry = zip.getEntry('OEBPS/chapter.xhtml');
+    if (!entry) throw new Error('CHAPTER_NOT_FOUND');
+    return entry.getData().toString('utf8');
 }

docker/src/scripts/books/reader.js

@@ -187,8 +187,7 @@ async function loadChapter() {
 
         // Lógica específica para contenido LOCAL
         if (provider === 'local') {
-            const unitIndex = Number(currentChapterId); // En local el ID suele ser el índice
-            const unit = data.units[unitIndex];
+            const unit = data.units.find(u => String(u.id) === String(currentChapterId));
 
             if (!unit) {
                 reader.innerHTML = '<div class="loading-container"><span>Chapter not found (Local)</span></div>';
@@ -201,8 +200,12 @@ async function loadChapter() {
             reader.innerHTML = '';
 
             // Setup navegación manual para local (simple index +/- 1)
+            const unitIndex = data.units.findIndex(
+                u => String(u.id) === String(currentChapterId)
+            );
             setupLocalNavigation(unitIndex, data.units.length);
 
+
             if (manifest.type === 'manga') {
                 currentType = 'manga';
                 updateSettingsVisibility();