695 lines
21 KiB
TypeScript
695 lines
21 KiB
TypeScript
import { EventEmitter } from 'node:events'
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import path from 'node:path'
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import type { YTDlpEventEmitter } from 'yt-dlp-wrap-plus'
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import type {
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DownloadHistoryItem,
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DownloadItem,
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DownloadOptions,
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DownloadProgress,
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PlaylistDownloadOptions,
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PlaylistInfo,
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VideoFormat,
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VideoInfo
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} from '../../shared/types'
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import { buildDownloadArgs } from '../download-engine/args-builder'
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import {
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findFormatByIdCandidates,
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parseSizeToBytes,
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resolveSelectedFormat
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} from '../download-engine/format-utils'
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import { settingsManager } from '../settings'
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import { scopedLoggers } from '../utils/logger'
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import { DownloadQueue } from './download-queue'
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import { historyManager } from './history-manager'
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import { ytdlpManager } from './ytdlp-manager'
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interface DownloadProcess {
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controller: AbortController
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process: YTDlpEventEmitter
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}
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class DownloadEngine extends EventEmitter {
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private activeDownloads: Map<string, DownloadProcess> = new Map()
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private queue: DownloadQueue
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constructor() {
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super()
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const maxConcurrent = settingsManager.get('maxConcurrentDownloads')
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this.queue = new DownloadQueue(maxConcurrent)
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this.queue.on('start-download', async (item) => {
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await this.executeDownload(item.id, item.options)
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})
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}
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async getVideoInfo(url: string): Promise<VideoInfo> {
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const ytdlp = ytdlpManager.getInstance()
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const settings = settingsManager.getAll()
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const args = ['-j', '--no-playlist', '--no-warnings']
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// Add encoding support for proper handling of non-ASCII characters
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args.push('--encoding', 'utf-8')
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// Add proxy if configured
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if (settings.proxy) {
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args.push('--proxy', settings.proxy)
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}
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// Add browser cookies if configured (skip if 'none')
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if (settings.browserForCookies && settings.browserForCookies !== 'none') {
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args.push('--cookies-from-browser', settings.browserForCookies)
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}
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// Add config file if configured
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if (settings.configPath) {
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args.push('--config-location', `"${settings.configPath}"`)
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}
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args.push(url)
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return new Promise((resolve, reject) => {
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const process = ytdlp.exec(args)
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let stdout = ''
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let stderr = ''
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process.ytDlpProcess?.stdout?.on('data', (data: Buffer) => {
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stdout += data.toString()
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})
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process.ytDlpProcess?.stderr?.on('data', (data: Buffer) => {
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stderr += data.toString()
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})
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process.on('close', (code) => {
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if (code === 0 && stdout) {
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try {
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const info = JSON.parse(stdout)
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scopedLoggers.download.info('Successfully retrieved video info for:', url)
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resolve(info)
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} catch (error) {
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scopedLoggers.download.error('Failed to parse video info for:', url, error)
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reject(new Error(`Failed to parse video info: ${error}`))
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}
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} else {
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scopedLoggers.download.error(
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'Failed to fetch video info for:',
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url,
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'Exit code:',
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code,
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'Error:',
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stderr
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)
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reject(new Error(stderr || 'Failed to fetch video info'))
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}
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})
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process.on('error', (error) => {
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scopedLoggers.download.error('yt-dlp process error for:', url, error)
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reject(error)
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})
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})
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}
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async getPlaylistInfo(url: string): Promise<PlaylistInfo> {
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const ytdlp = ytdlpManager.getInstance()
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const settings = settingsManager.getAll()
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const args = ['-j', '--flat-playlist', '--no-warnings']
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// Add encoding support for proper handling of non-ASCII characters
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args.push('--encoding', 'utf-8')
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// Add proxy if configured
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if (settings.proxy) {
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args.push('--proxy', settings.proxy)
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}
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// Add browser cookies if configured (skip if 'none')
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if (settings.browserForCookies && settings.browserForCookies !== 'none') {
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args.push('--cookies-from-browser', settings.browserForCookies)
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}
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args.push(url)
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return new Promise((resolve, reject) => {
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const process = ytdlp.exec(args)
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let stdout = ''
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let stderr = ''
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process.ytDlpProcess?.stdout?.on('data', (data: Buffer) => {
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stdout += data.toString()
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})
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process.ytDlpProcess?.stderr?.on('data', (data: Buffer) => {
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stderr += data.toString()
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})
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process.on('close', (code) => {
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if (code === 0 && stdout) {
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try {
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const lines = stdout.trim().split('\n')
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const entries = lines.map((line) => JSON.parse(line))
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const playlistEntry = entries[0]
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resolve({
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id: playlistEntry.id || '',
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title: playlistEntry.title || 'Playlist',
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entries: entries.map((entry) => ({
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id: entry.id || '',
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title: entry.title || 'Unknown',
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url: entry.url || entry.webpage_url || ''
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})),
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entryCount: entries.length
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})
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} catch (error) {
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reject(new Error(`Failed to parse playlist info: ${error}`))
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}
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} else {
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reject(new Error(stderr || 'Failed to fetch playlist info'))
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}
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})
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process.on('error', (error) => {
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reject(error)
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})
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})
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}
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async startPlaylistDownload(options: PlaylistDownloadOptions): Promise<string[]> {
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const playlistInfo = await this.getPlaylistInfo(options.url)
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const downloadIds: string[] = []
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// Calculate the range of entries to download
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const startIndex = (options.startIndex || 1) - 1 // Convert to 0-based index
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const endIndex = options.endIndex ? options.endIndex - 1 : playlistInfo.entries.length - 1
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const entriesToDownload = playlistInfo.entries.slice(startIndex, endIndex + 1)
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scopedLoggers.download.info(
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`Starting playlist download: ${entriesToDownload.length} videos from "${playlistInfo.title}"`
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)
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// Create download items for each video in the playlist
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for (const entry of entriesToDownload) {
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const downloadId = `playlist_${Date.now()}_${Math.random().toString(36).substring(7)}`
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downloadIds.push(downloadId)
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const downloadOptions: DownloadOptions = {
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url: entry.url,
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type: options.type,
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format: options.format,
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audioFormat: options.type === 'audio' ? options.format : undefined
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}
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const createdAt = Date.now()
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// Add to queue
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this.queue.add(downloadId, downloadOptions, {
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id: downloadId,
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url: entry.url,
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title: entry.title,
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type: options.type,
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status: 'pending',
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progress: { percent: 0 },
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createdAt
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})
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this.upsertHistoryEntry(downloadId, downloadOptions, {
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title: entry.title,
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status: 'pending',
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downloadedAt: createdAt
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})
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}
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return downloadIds
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}
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startDownload(id: string, options: DownloadOptions): void {
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if (this.activeDownloads.has(id)) {
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console.warn(`Download ${id} is already active`)
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return
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}
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const createdAt = Date.now()
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const settings = settingsManager.getAll()
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const item: DownloadItem = {
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id,
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url: options.url,
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title: 'Downloading...',
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type: options.type,
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status: 'pending' as const,
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createdAt
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}
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this.queue.add(id, options, item)
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this.upsertHistoryEntry(id, options, {
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title: item.title,
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status: 'pending',
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downloadedAt: createdAt,
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downloadPath: settings.downloadPath
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})
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}
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private async executeDownload(id: string, options: DownloadOptions): Promise<void> {
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scopedLoggers.download.info('Starting download execution for ID:', id, 'URL:', options.url)
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const ytdlp = ytdlpManager.getInstance()
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const settings = settingsManager.getAll()
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const downloadPath = settings.downloadPath
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// Set environment variables for proper encoding on Windows
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if (process.platform === 'win32') {
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process.env.PYTHONIOENCODING = 'utf-8'
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process.env.LC_ALL = 'C.UTF-8'
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}
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let availableFormats: VideoFormat[] = []
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let selectedFormat: VideoFormat | undefined
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let actualFormat: string | null = null
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let actualQuality: string | null = null
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let actualCodec: string | null = null
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let videoInfo: VideoInfo | undefined
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// First, get detailed video info to capture basic metadata and formats
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try {
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const info = await this.getVideoInfo(options.url)
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videoInfo = info
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availableFormats = Array.isArray(info.formats) ? info.formats : []
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selectedFormat = resolveSelectedFormat(availableFormats, options, settings)
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if (selectedFormat) {
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actualFormat = selectedFormat.ext || actualFormat
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if (selectedFormat.height) {
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actualQuality = `${selectedFormat.height}p${
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selectedFormat.fps && selectedFormat.fps === 60 ? '60' : ''
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}`
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} else if (selectedFormat.format_note) {
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actualQuality = selectedFormat.format_note
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}
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if (options.type === 'audio' || options.type === 'extract') {
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actualCodec = selectedFormat.acodec || actualCodec
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} else {
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actualCodec = selectedFormat.vcodec || selectedFormat.acodec || actualCodec
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}
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}
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this.updateDownloadInfo(id, {
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title: info.title,
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thumbnail: info.thumbnail,
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duration: info.duration,
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description: info.description,
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uploader: info.uploader,
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viewCount: info.view_count,
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// Store only essential download info
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selectedFormat
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})
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this.upsertHistoryEntry(id, options, {
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title: info.title,
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thumbnail: info.thumbnail,
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duration: info.duration,
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description: info.description,
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uploader: info.uploader,
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viewCount: info.view_count,
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// Store only essential download info
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selectedFormat
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})
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} catch (error) {
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scopedLoggers.download.warn('Failed to get detailed video info for ID:', id, error)
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}
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const applySelectedFormat = (formatId: string | undefined): boolean => {
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if (!formatId) {
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return false
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}
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const candidate = findFormatByIdCandidates(availableFormats, formatId)
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if (!candidate) {
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return false
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}
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if (selectedFormat?.format_id === candidate.format_id) {
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return true
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}
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selectedFormat = candidate
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actualFormat = candidate.ext || actualFormat
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if (candidate.height) {
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actualQuality = `${candidate.height}p${candidate.fps === 60 ? '60' : ''}`
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} else if (candidate.format_note) {
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actualQuality = candidate.format_note
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}
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if (options.type === 'audio' || options.type === 'extract') {
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actualCodec = candidate.acodec || actualCodec
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} else {
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actualCodec = candidate.vcodec || candidate.acodec || actualCodec
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}
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this.updateDownloadInfo(id, {
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selectedFormat: candidate
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})
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return true
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}
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const args = buildDownloadArgs(options, downloadPath, settings)
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const controller = new AbortController()
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const ytdlpProcess = ytdlp.exec(args, {
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signal: controller.signal
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})
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this.activeDownloads.set(id, { controller, process: ytdlpProcess })
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this.emit('download-started', id)
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this.upsertHistoryEntry(id, options, {
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status: 'downloading'
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})
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let latestKnownSizeBytes: number | undefined
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// Handle progress
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ytdlpProcess.on(
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'progress',
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(progress: {
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percent?: number
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currentSpeed?: string
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eta?: string
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downloaded?: string
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total?: string
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}) => {
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const totalBytes = parseSizeToBytes(progress.total)
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if (totalBytes !== undefined) {
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latestKnownSizeBytes = totalBytes
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}
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const downloadedBytes = parseSizeToBytes(progress.downloaded)
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if (downloadedBytes !== undefined) {
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latestKnownSizeBytes =
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latestKnownSizeBytes !== undefined
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? Math.max(latestKnownSizeBytes, downloadedBytes)
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: downloadedBytes
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}
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const downloadProgress: DownloadProgress = {
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percent: progress.percent || 0,
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currentSpeed: progress.currentSpeed || '',
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eta: progress.eta || '',
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downloaded: progress.downloaded || '',
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total: progress.total || ''
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}
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this.emit('download-progress', id, downloadProgress)
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}
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)
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// Handle yt-dlp events to capture format info
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ytdlpProcess.on('ytDlpEvent', (eventType: string, eventData: string) => {
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// Look for format selection messages
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if (eventType === 'info' && eventData.includes('format')) {
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// Extract format info from yt-dlp output
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const formatMatch = eventData.match(/\[info\]\s*([^\s:]+):\s*(.+)/)
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if (formatMatch) {
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const formatId = formatMatch[1]
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const formatInfo = formatMatch[2]
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applySelectedFormat(formatId)
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// Extract format details with better regex patterns
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const extMatch = formatInfo.match(/(\w+)(?:\s|$)/)
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if (extMatch && !actualFormat) {
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actualFormat = extMatch[1]
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}
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const heightMatch = formatInfo.match(/(\d+)p/)
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if (heightMatch && !actualQuality) {
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actualQuality = `${heightMatch[1]}p`
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}
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const codecMatch = formatInfo.match(/(?:vcodec|acodec)[:\s]*([^\s,]+)/)
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if (codecMatch && !actualCodec) {
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actualCodec = codecMatch[1]
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}
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}
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}
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// Also look for download progress messages that might contain format info
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if (eventType === 'download' && eventData.includes('format')) {
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const formatMatch = eventData.match(/format\s*([0-9A-Za-z+-]+)/)
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if (formatMatch) {
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applySelectedFormat(formatMatch[1])
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}
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}
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})
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// Handle completion
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ytdlpProcess.on('close', async (code: number | null) => {
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this.activeDownloads.delete(id)
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this.queue.downloadCompleted(id)
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if (code === 0) {
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// Generate file path using downloadPath + title + ext
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const title = videoInfo?.title || 'Unknown'
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const sanitizedTitle = title.replace(/[<>:"/\\|?*]/g, '_').substring(0, 50)
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const extension =
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options.type === 'audio' ? options.extractFormat || 'mp3' : actualFormat || 'mp4'
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const fileName = `${sanitizedTitle}.${extension}`
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const finalOutputPath = path.join(downloadPath, fileName)
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scopedLoggers.download.info('Generated file path for ID:', id, 'Path:', finalOutputPath)
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let fileSize: number | undefined
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try {
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const fs = await import('node:fs/promises')
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const stats = await fs.stat(finalOutputPath)
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fileSize = stats.size
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} catch (error) {
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if (latestKnownSizeBytes !== undefined) {
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fileSize = latestKnownSizeBytes
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} else {
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scopedLoggers.download.warn('Failed to get file size for ID:', id, error)
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}
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}
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if (fileSize === undefined && latestKnownSizeBytes !== undefined) {
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fileSize = latestKnownSizeBytes
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}
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this.updateDownloadInfo(id, {
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status: 'completed',
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completedAt: Date.now(),
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fileSize,
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format: actualFormat || undefined,
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quality: actualQuality || undefined,
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codec: actualCodec || undefined
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})
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scopedLoggers.download.info('Download completed successfully for ID:', id)
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this.emit('download-completed', id)
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this.addToHistory(id, options, 'completed', undefined)
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} else {
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scopedLoggers.download.error(
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'Download failed with exit code for ID:',
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id,
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'Exit code:',
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code
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)
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this.emit('download-error', id, new Error(`Download exited with code ${code}`))
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this.addToHistory(id, options, 'error', `Download exited with code ${code}`)
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}
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})
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// Handle errors
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ytdlpProcess.on('error', (error: Error) => {
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scopedLoggers.download.error('Download process error for ID:', id, error)
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this.activeDownloads.delete(id)
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this.queue.downloadCompleted(id)
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this.emit('download-error', id, error)
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this.addToHistory(id, options, 'error', error.message)
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})
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}
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cancelDownload(id: string): boolean {
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scopedLoggers.download.info('Cancelling download for ID:', id)
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const snapshot = this.queue.getItemDetails(id)
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const download = this.activeDownloads.get(id)
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if (download) {
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download.controller.abort()
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const removedFromQueue = this.queue.remove(id)
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this.activeDownloads.delete(id)
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scopedLoggers.download.info('Download cancelled successfully for ID:', id)
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this.emit('download-cancelled', id)
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if (snapshot) {
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this.upsertHistoryEntry(id, snapshot.options, {
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status: 'cancelled',
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completedAt: Date.now()
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})
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}
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return removedFromQueue
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}
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const removed = this.queue.remove(id)
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if (removed && snapshot) {
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this.upsertHistoryEntry(id, snapshot.options, {
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status: 'cancelled',
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completedAt: Date.now()
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})
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}
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return removed
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}
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updateMaxConcurrent(max: number): void {
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this.queue.setMaxConcurrent(max)
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}
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getQueueStatus() {
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return this.queue.getQueueStatus()
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}
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updateDownloadInfo(id: string, updates: Partial<DownloadItem>): void {
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this.queue.updateItemInfo(id, updates)
|
|
|
|
const snapshot = this.queue.getItemDetails(id)
|
|
if (!snapshot) {
|
|
return
|
|
}
|
|
|
|
const historyUpdates: Partial<DownloadHistoryItem> = {}
|
|
|
|
if (updates.title !== undefined) {
|
|
historyUpdates.title = updates.title
|
|
}
|
|
if (updates.thumbnail !== undefined) {
|
|
historyUpdates.thumbnail = updates.thumbnail
|
|
}
|
|
if (updates.duration !== undefined) {
|
|
historyUpdates.duration = updates.duration
|
|
}
|
|
if (updates.fileSize !== undefined) {
|
|
historyUpdates.fileSize = updates.fileSize
|
|
}
|
|
if (updates.format !== undefined) {
|
|
historyUpdates.format = updates.format
|
|
}
|
|
if (updates.quality !== undefined) {
|
|
historyUpdates.quality = updates.quality
|
|
}
|
|
if (updates.codec !== undefined) {
|
|
historyUpdates.codec = updates.codec
|
|
}
|
|
if (updates.description !== undefined) {
|
|
historyUpdates.description = updates.description
|
|
}
|
|
if (updates.channel !== undefined) {
|
|
historyUpdates.channel = updates.channel
|
|
}
|
|
if (updates.uploader !== undefined) {
|
|
historyUpdates.uploader = updates.uploader
|
|
}
|
|
if (updates.viewCount !== undefined) {
|
|
historyUpdates.viewCount = updates.viewCount
|
|
}
|
|
if (updates.tags !== undefined) {
|
|
historyUpdates.tags = updates.tags
|
|
}
|
|
if (updates.status !== undefined) {
|
|
historyUpdates.status = updates.status
|
|
}
|
|
if (updates.completedAt !== undefined) {
|
|
historyUpdates.completedAt = updates.completedAt
|
|
}
|
|
if (updates.error !== undefined) {
|
|
historyUpdates.error = updates.error
|
|
}
|
|
if (updates.selectedFormat !== undefined) {
|
|
historyUpdates.selectedFormat = updates.selectedFormat
|
|
}
|
|
|
|
if (Object.keys(historyUpdates).length > 0) {
|
|
this.upsertHistoryEntry(id, snapshot.options, historyUpdates)
|
|
}
|
|
}
|
|
|
|
private addToHistory(
|
|
id: string,
|
|
options: DownloadOptions,
|
|
status: DownloadHistoryItem['status'],
|
|
error?: string
|
|
): void {
|
|
// Get the download item from the queue to get additional info
|
|
const completedDownload = this.queue.getCompletedDownload(id)
|
|
scopedLoggers.download.info('Completed download:', completedDownload)
|
|
const completedAt = Date.now()
|
|
|
|
this.upsertHistoryEntry(id, options, {
|
|
title: completedDownload?.item.title || `Download ${id}`,
|
|
thumbnail: completedDownload?.item.thumbnail,
|
|
status,
|
|
completedAt,
|
|
error,
|
|
duration: completedDownload?.item.duration,
|
|
fileSize: completedDownload?.item.fileSize,
|
|
format: completedDownload?.item.format,
|
|
quality: completedDownload?.item.quality,
|
|
codec: completedDownload?.item.codec,
|
|
description: completedDownload?.item.description,
|
|
channel: completedDownload?.item.channel,
|
|
uploader: completedDownload?.item.uploader,
|
|
viewCount: completedDownload?.item.viewCount,
|
|
tags: completedDownload?.item.tags
|
|
})
|
|
}
|
|
|
|
private upsertHistoryEntry(
|
|
id: string,
|
|
options: DownloadOptions,
|
|
updates: Partial<DownloadHistoryItem>
|
|
): void {
|
|
const existing = historyManager.getHistoryById(id)
|
|
const base: DownloadHistoryItem = existing ?? {
|
|
id,
|
|
url: options.url,
|
|
title: updates.title || `Download ${id}`,
|
|
thumbnail: updates.thumbnail,
|
|
type: options.type,
|
|
status: updates.status || 'pending',
|
|
downloadPath: updates.downloadPath,
|
|
fileSize: updates.fileSize,
|
|
duration: updates.duration,
|
|
downloadedAt: updates.downloadedAt ?? Date.now(),
|
|
completedAt: updates.completedAt,
|
|
error: updates.error,
|
|
format: updates.format,
|
|
quality: updates.quality,
|
|
codec: updates.codec,
|
|
description: updates.description,
|
|
channel: updates.channel,
|
|
uploader: updates.uploader,
|
|
viewCount: updates.viewCount,
|
|
tags: updates.tags,
|
|
// Download-specific format info
|
|
selectedFormat: updates.selectedFormat
|
|
}
|
|
|
|
const merged: DownloadHistoryItem = {
|
|
...base,
|
|
...updates,
|
|
id,
|
|
url: updates.url ?? base.url,
|
|
type: updates.type ?? base.type,
|
|
title: updates.title ?? base.title,
|
|
status: updates.status ?? base.status,
|
|
downloadedAt: updates.downloadedAt ?? base.downloadedAt
|
|
}
|
|
|
|
historyManager.addHistoryItem(merged)
|
|
}
|
|
}
|
|
|
|
export const downloadEngine = new DownloadEngine()
|