deemix-py/deemix/app/downloader.py

#!/usr/bin/env python3
from deemix.api.deezer import APIError, USER_AGENT_HEADER
from deemix.utils.taggers import tagID3, tagFLAC
from deemix.utils.pathtemplates import generateFilename, generateFilepath, settingsRegexAlbum, settingsRegexArtist
from deemix.utils.misc import changeCase
from deemix.utils.spotifyHelper import get_trackid_spotify, get_albumid_spotify
import os.path
from os import makedirs, remove
from requests import get
from requests.exceptions import HTTPError, ConnectionError
from tempfile import gettempdir
from concurrent.futures import ThreadPoolExecutor
from Cryptodome.Cipher import Blowfish
from time import sleep
import re

TEMPDIR = os.path.join(gettempdir(), 'deemix-imgs')
if not os.path.isdir(TEMPDIR):
	makedirs(TEMPDIR)

extensions = {
	9: '.flac',
	3: '.mp3',
	1: '.mp3',
	8: '.mp3',
	15: '.mp4',
	14: '.mp4',
	13: '.mp4'
}
downloadPercentage = 0
lastPercentage = 0

def stream_track(dz, track, stream, trackAPI, queueItem, socket=None):
	global downloadPercentage, lastPercentage
	if 'cancel' in queueItem:
		raise downloadCancelled
	try:
		request = get(track['downloadUrl'], headers=dz.http_headers, stream=True, timeout=30)
	except ConnectionError:
		sleep(2)
		return stream_track(dz, track, stream, trackAPI, queueItem, socket)
	request.raise_for_status()
	blowfish_key = str.encode(dz._get_blowfish_key(str(track['id'])))
	complete = track['selectedFilesize']
	chunkLength = 0
	percentage = 0
	i = 0
	for chunk in request.iter_content(2048):
		if 'cancel' in queueItem:
			raise downloadCancelled
		if (i % 3) == 0 and len(chunk) == 2048:
			chunk = Blowfish.new(blowfish_key, Blowfish.MODE_CBC, b"\x00\x01\x02\x03\x04\x05\x06\x07").decrypt(chunk)
		stream.write(chunk)
		chunkLength += len(chunk)
		if 'SINGLE_TRACK' in trackAPI:
			percentage = (chunkLength / complete) * 100
			downloadPercentage = percentage
		else:
			chunkProgres = (len(chunk) / complete) / trackAPI['SIZE'] * 100
			downloadPercentage += chunkProgres
		if round(downloadPercentage) != lastPercentage and round(percentage) % 5 == 0:
				lastPercentage = round(downloadPercentage)
				if socket:
					queueItem['progress'] = lastPercentage
					socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'progress': lastPercentage})
		i += 1

def downloadImage(url, path):
	if not os.path.isfile(path):
		try:
			image = get(url, headers={'User-Agent': USER_AGENT_HEADER}, timeout=30)
			with open(path, 'wb') as f:
				f.write(image.content)
				return path
		except ConnectionError:
			sleep(1)
			return downloadImage(url, path)
		except HTTPError:
			print("Couldn't download Image")
		remove(path)
		return None
	else:
		return path

def formatDate(date, template):
	if 'YYYY' in template:
		template = template.replace('YYYY', str(date['year']))
	if 'YY' in template:
		template = template.replace('YY', str(date['year']))
	if 'Y' in template:
		template = template.replace('Y', str(date['year']))
	if 'MM' in template:
		template = template.replace('MM', str(date['month']))
	if 'M' in template:
		template = template.replace('M', str(date['month']))
	if 'DD' in template:
		template = template.replace('DD', str(date['day']))
	if 'D' in template:
		template = template.replace('D', str(date['day']))
	return template

def getPreferredBitrate(filesize, bitrate, fallback=True):
	if not fallback:
		formats = {9: 'flac', 3: 'mp3_320', 1: 'mp3_128', 15: '360_hq', 14: '360_mq', 13: '360_lq'}
		if filesize[formats[int(bitrate)]] > 0:
			return (int(bitrate), filesize[formats[int(bitrate)]])
		else:
			return (-100, 0)
	if int(bitrate) in [13,14,15]:
		formats = {'360_hq': 15, '360_mq': 14, '360_lq': 13}
		selectedFormat = -200
		selectedFilesize = 0
		for format, formatNum in formats.items():
			if formatNum <= int(bitrate) and filesize[format] > 0:
				selectedFormat = formatNum
				selectedFilesize = filesize[format]
				break
	else:
		formats = {'flac': 9, 'mp3_320': 3, 'mp3_128': 1}
		selectedFormat = 8
		selectedFilesize = filesize['default']
		for format, formatNum in formats.items():
			if formatNum <= int(bitrate) and filesize[format] > 0:
				selectedFormat = formatNum
				selectedFilesize = filesize[format]
				break
	return (selectedFormat, selectedFilesize)

def parseEssentialTrackData(track, trackAPI):
	track['id'] = trackAPI['SNG_ID']
	track['duration'] = trackAPI['DURATION']
	track['MD5'] = trackAPI['MD5_ORIGIN']
	track['mediaVersion'] = trackAPI['MEDIA_VERSION']
	if 'FALLBACK' in trackAPI:
		track['fallbackId'] = trackAPI['FALLBACK']['SNG_ID']
	else:
		track['fallbackId'] = 0
	track['filesize'] = {}
	track['filesize']['default'] = int(trackAPI['FILESIZE']) if 'FILESIZE' in trackAPI else 0
	track['filesize']['mp3_128'] = int(trackAPI['FILESIZE_MP3_128']) if 'FILESIZE_MP3_128' in trackAPI else 0
	track['filesize']['mp3_320'] = int(trackAPI['FILESIZE_MP3_320']) if 'FILESIZE_MP3_320' in trackAPI else 0
	track['filesize']['flac'] = int(trackAPI['FILESIZE_FLAC']) if 'FILESIZE_FLAC' in trackAPI else 0
	track['filesize']['360_lq'] = int(trackAPI['FILESIZE_MP4_RA1']) if 'FILESIZE_MP4_RA1' in trackAPI else 0
	track['filesize']['360_mq'] = int(trackAPI['FILESIZE_MP4_RA2']) if 'FILESIZE_MP4_RA2' in trackAPI else 0
	track['filesize']['360_hq'] = int(trackAPI['FILESIZE_MP4_RA3']) if 'FILESIZE_MP4_RA3' in trackAPI else 0

	return track

def getTrackData(dz, trackAPI_gw, trackAPI = None, albumAPI_gw = None, albumAPI = None):
	if not 'MD5_ORIGIN' in trackAPI_gw:
		trackAPI_gw['MD5_ORIGIN'] = dz.get_track_md5(trackAPI_gw['SNG_ID'])

	track = {}
	track['title'] = trackAPI_gw['SNG_TITLE']
	if 'VERSION' in trackAPI_gw and trackAPI_gw['VERSION']:
		track['title'] += " " + trackAPI_gw['VERSION']

	track = parseEssentialTrackData(track, trackAPI_gw)

	if int(track['id']) < 0:
		track['filesize'] = trackAPI_gw['FILESIZE']
		track['album'] = {}
		track['album']['id'] = 0
		track['album']['title'] = trackAPI_gw['ALB_TITLE']
		if 'ALB_PICTURE' in trackAPI_gw:
			track['album']['pic'] = trackAPI_gw['ALB_PICTURE']
		track['mainArtist'] = {}
		track['mainArtist']['id'] = 0
		track['mainArtist']['name'] = trackAPI_gw['ART_NAME']
		track['artists'] = [trackAPI_gw['ART_NAME']]
		track['aritst'] = {
			'Main': [trackAPI_gw['ART_NAME']]
		}
		track['date'] = {
			'day': 0,
			'month': 0,
			'year': 0
		}
		track['localTrack'] = True
		return track

	if 'DISK_NUMBER' in trackAPI_gw:
		track['discNumber'] = trackAPI_gw['DISK_NUMBER']
	if 'EXPLICIT_LYRICS' in trackAPI_gw:
		track['explicit'] = trackAPI_gw['EXPLICIT_LYRICS'] != "0"
	if 'COPYRIGHT' in trackAPI_gw:
		track['copyright'] = trackAPI_gw['COPYRIGHT']
	track['replayGain'] = "{0:.2f} dB".format((float(trackAPI_gw['GAIN']) + 18.4) * -1) if 'GAIN' in trackAPI_gw else None
	track['ISRC'] = trackAPI_gw['ISRC']
	track['trackNumber'] = trackAPI_gw['TRACK_NUMBER']
	track['contributors'] = trackAPI_gw['SNG_CONTRIBUTORS']
	if 'POSITION' in trackAPI_gw:
		track['position'] = trackAPI_gw['POSITION']

	track['lyrics'] = {}
	if 'LYRICS_ID' in trackAPI_gw:
		track['lyrics']['id'] = trackAPI_gw['LYRICS_ID']
	if not "LYRICS" in trackAPI_gw and int(track['lyrics']['id']) != 0:
		trackAPI_gw["LYRICS"] = dz.get_lyrics_gw(track['id'])
	if int(track['lyrics']['id']) != 0:
		if "LYRICS_TEXT" in trackAPI_gw["LYRICS"]:
			track['lyrics']['unsync'] = trackAPI_gw["LYRICS"]["LYRICS_TEXT"]
		if "LYRICS_SYNC_JSON" in trackAPI_gw["LYRICS"]:
			track['lyrics']['sync'] = ""
			lastTimestamp = ""
			for i in range(len(trackAPI_gw["LYRICS"]["LYRICS_SYNC_JSON"])):
				if "lrc_timestamp" in trackAPI_gw["LYRICS"]["LYRICS_SYNC_JSON"][i]:
					track['lyrics']['sync'] += trackAPI_gw["LYRICS"]["LYRICS_SYNC_JSON"][i]["lrc_timestamp"]
					lastTimestamp = trackAPI_gw["LYRICS"]["LYRICS_SYNC_JSON"][i]["lrc_timestamp"]
				else:
					track['lyrics']['sync'] += lastTimestamp
				track['lyrics']['sync'] += trackAPI_gw["LYRICS"]["LYRICS_SYNC_JSON"][i]["line"] + "\r\n"

	track['mainArtist'] = {}
	track['mainArtist']['id'] = trackAPI_gw['ART_ID']
	track['mainArtist']['name'] = trackAPI_gw['ART_NAME']
	if 'ART_PICTURE' in trackAPI_gw:
		track['mainArtist']['pic'] = trackAPI_gw['ART_PICTURE']

	if 'PHYSICAL_RELEASE_DATE' in trackAPI_gw:
		track['date'] = {
			'day': trackAPI_gw["PHYSICAL_RELEASE_DATE"][8:10],
			'month': trackAPI_gw["PHYSICAL_RELEASE_DATE"][5:7],
			'year': trackAPI_gw["PHYSICAL_RELEASE_DATE"][0:4]
		}

	track['album'] = {}
	track['album']['id'] = trackAPI_gw['ALB_ID']
	track['album']['title'] = trackAPI_gw['ALB_TITLE']
	if 'ALB_PICTURE' in trackAPI_gw:
		track['album']['pic'] = trackAPI_gw['ALB_PICTURE']

	try:
		if not albumAPI:
			albumAPI = dz.get_album(track['album']['id'])
		track['album']['mainArtist'] = {
			'id': albumAPI['artist']['id'],
			'name': albumAPI['artist']['name'],
			'pic': albumAPI['artist']['picture_small'][albumAPI['artist']['picture_small'].find('artist/')+7:-24]
		}
		track['album']['artist'] = {}
		track['album']['artists'] = []
		for artist in albumAPI['contributors']:
			if artist['id'] != 5080:
				track['album']['artists'].append(artist['name'])
				if not artist['role'] in track['album']['artist']:
					track['album']['artist'][artist['role']] = []
				track['album']['artist'][artist['role']].append(artist['name'])
		track['album']['trackTotal'] = albumAPI['nb_tracks']
		track['album']['recordType'] = albumAPI['record_type']
		track['album']['barcode'] = albumAPI['upc'] if 'upc' in albumAPI else "Unknown"
		track['album']['label'] = albumAPI['label'] if 'label' in albumAPI else "Unknown"
		if not 'pic' in track['album']:
			track['album']['pic'] = albumAPI['cover_small'][albumAPI['cover_small'].find('cover/')+6:-24]
		if 'release_date' in albumAPI:
			track['album']['date'] = {
				'day': albumAPI["release_date"][8:10],
				'month': albumAPI["release_date"][5:7],
				'year': albumAPI["release_date"][0:4]
			}
		track['album']['discTotal'] = albumAPI['nb_disk'] if 'nb_disk' in albumAPI else None
		track['copyright'] = albumAPI['copyright'] if 'copyright' in albumAPI else None
		track['album']['genre'] = []
		if 'genres' in albumAPI and 'data' in albumAPI['genres'] and len(albumAPI['genres']['data']) > 0:
			for genre in albumAPI['genres']['data']:
				track['album']['genre'].append(genre['name'])
	except APIError:
		if not albumAPI_gw:
			albumAPI_gw = dz.get_album_gw(track['album']['id'])
		track['album']['mainArtist'] = {
			'id': albumAPI_gw['ART_ID'],
			'name': albumAPI_gw['ART_NAME']
		}
		artistAPI = dz.get_artist(track['album']['mainArtist']['id'])
		track['album']['artists'] = albumAPI_gw['ART_NAME']
		track['album']['mainArtist']['pic'] = artistAPI['picture_small'][artistAPI['picture_small'].find('artist/')+7:-24]
		track['album']['trackTotal'] = albumAPI_gw['NUMBER_TRACK']
		track['album']['discTotal'] = albumAPI_gw['NUMBER_DISK']
		track['album']['recordType'] = "Album"
		track['album']['barcode'] = "Unknown"
		track['album']['label'] = albumAPI_gw['LABEL_NAME'] if 'LABEL_NAME' in albumAPI_gw else "Unknown"
		if not 'pic' in track['album']:
			track['album']['pic'] = albumAPI_gw['ALB_PICTURE']
		if 'PHYSICAL_RELEASE_DATE' in albumAPI_gw:
			track['album']['date'] = {
				'day': albumAPI_gw["PHYSICAL_RELEASE_DATE"][8:10],
				'month': albumAPI_gw["PHYSICAL_RELEASE_DATE"][5:7],
				'year': albumAPI_gw["PHYSICAL_RELEASE_DATE"][0:4]
			}
		track['album']['genre'] = []

	if 'date' in track['album']:
		track['date'] = track['album']['date']

	if not trackAPI:
		trackAPI = dz.get_track(track['id'])
	track['bpm'] = trackAPI['bpm']
	if not 'replayGain' in track:
		track['replayGain'] = "{0:.2f} dB".format((float(trackAPI['gain']) + 18.4) * -1) if 'gain' in trackAPI else ""
	if not 'explicit' in track:
		track['explicit'] = trackAPI['explicit_lyrics']
	if not 'discNumber' in track:
		track['discNumber'] = trackAPI['disk_number']
	track['artist'] = {}
	track['artists'] = []
	for artist in trackAPI['contributors']:
		if artist['id'] != 5080:
			track['artists'].append(artist['name'])
			if not artist['role'] in track['artist']:
				track['artist'][artist['role']] = []
			track['artist'][artist['role']].append(artist['name'])

	if not 'discTotal' in track['album'] or not track['album']['discTotal']:
		if not albumAPI_gw:
			albumAPI_gw = dz.get_album_gw(track['album']['id'])
		track['album']['discTotal'] = albumAPI_gw['NUMBER_DISK']
	if not 'copyright' in track or not track['copyright']:
		if not albumAPI_gw:
			albumAPI_gw = dz.get_album_gw(track['album']['id'])
		track['copyright'] = albumAPI_gw['COPYRIGHT']

	# Fix incorrect day month when detectable
	if int(track['date']['month']) > 12:
		monthTemp = track['date']['month']
		track['date']['month'] = track['date']['day']
		track['date']['day'] = monthTemp
	if int(track['album']['date']['month']) > 12:
		monthTemp = track['album']['date']['month']
		track['album']['date']['month'] = track['album']['date']['day']
		track['album']['date']['day'] = monthTemp

	# Remove featuring from the title
	track['title_clean'] = track['title']
	if "(feat." in track['title_clean'].lower():
		pos = track['title_clean'].lower().find("(feat.")
		tempTrack = track['title_clean'][:pos]
		if ")" in track['title_clean']:
			tempTrack += track['title_clean'][track['title_clean'].find(")",pos+1)+1:]
		track['title_clean'] = tempTrack.strip()

	# Create artists strings
	track['mainArtistsString'] = ""
	if 'Main' in track['artist']:
		tot = len(track['artist']['Main'])
		for i, art in enumerate(track['artist']['Main']):
			track['mainArtistsString'] += art
			if tot != i+1:
				if tot-1 == i+1:
					track['mainArtistsString'] += " & "
				else:
					track['mainArtistsString'] += ", "
	else:
		track['mainArtistsString'] = track['mainArtist']['name']
	if 'Featured' in track['artist']:
		tot = len(track['artist']['Featured'])
		track['featArtistsString'] = "feat. "
		for i, art in enumerate(track['artist']['Featured']):
			track['featArtistsString'] += art
			if tot != i+1:
				if tot-1 == i+1:
					track['featArtistsString'] += " & "
				else:
					track['featArtistsString'] += ", "

	# Create title with feat
	if "(feat." in track['title'].lower():
		track['title_feat'] = track['title']
	elif 'Featured' in track['artist']:
		track['title_feat'] = track['title']+" ({})".format(track['featArtistsString'])
	else:
		track['title_feat'] = track['title']

	return track

def downloadTrackObj(dz, trackAPI, settings, bitrate, queueItem, extraTrack=None, socket=None):
	result = {}
	if 'cancel' in queueItem:
		result['cancel'] = True
		return result
	# Get the metadata
	if extraTrack:
		track = extraTrack
	else:
		track = getTrackData(dz,
			trackAPI_gw = trackAPI,
			trackAPI =  trackAPI['_EXTRA_TRACK'] if '_EXTRA_TRACK' in trackAPI else None,
			albumAPI = trackAPI['_EXTRA_ALBUM'] if '_EXTRA_ALBUM' in trackAPI else None
		)
	if 'cancel' in queueItem:
		result['cancel'] = True
		return result
	print('Downloading: {} - {}'.format(track['mainArtist']['name'], track['title']))
	if track['MD5'] == '':
		if track['fallbackId'] != 0:
			print("Track not yet encoded, using fallback id")
			trackNew = dz.get_track_gw(track['fallbackId'])
			if not 'MD5_ORIGIN' in trackNew:
				trackNew['MD5_ORIGIN'] = dz.get_track_md5(trackNew['SNG_ID'])
			track = parseEssentialTrackData(track, trackNew)
			return downloadTrackObj(dz, trackAPI, settings, bitrate, queueItem, extraTrack=track, socket=socket)
		elif not 'searched' in track and settings['fallbackSearch']:
			print("Track not yet encoded, searching for alternative")
			searchedId = dz.get_track_from_metadata(track['mainArtist']['name'], track['title'], track['album']['title'])
			if searchedId != 0:
				trackNew = dz.get_track_gw(searchedId)
				if not 'MD5_ORIGIN' in trackNew:
					trackNew['MD5_ORIGIN'] = dz.get_track_md5(trackNew['SNG_ID'])
				track = parseEssentialTrackData(track, trackNew)
				track['searched'] = True
				return downloadTrackObj(dz, trackAPI, settings, bitrate, queueItem, extraTrack=track, socket=socket)
			else:
				print("ERROR: Track not yet encoded and no alternative found!")
				result['error'] = {
					'message': "Track not yet encoded and no alternative found!",
					'data': track
				}
				if socket:
					queueItem['failed'] += 1
					socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True, 'data': track, 'error': "Track not yet encoded and no alternative found!"})
				return result
		else:
			print("ERROR: Track not yet encoded!")
			result['error'] = {
				'message': "Track not yet encoded!",
				'data': track
			}
			if socket:
				queueItem['failed'] += 1
				socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True, 'data': track, 'error': "Track not yet encoded!"})
			return result

	# Get the selected bitrate
	(format, filesize) = getPreferredBitrate(track['filesize'], bitrate, settings['fallbackBitrate'])
	if format == -100:
		print("ERROR: Track not found at desired bitrate. Enable fallback to lower bitrates to fix this issue.")
		result['error'] = {
			'message': "Track not found at desired bitrate.",
			'data': track
		}
		if socket:
			queueItem['failed'] += 1
			socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True, 'data': track, 'error': "Track not found at desired bitrate."})
		return result
	elif format == -200:
		print("ERROR: This track is not available in 360 Reality Audio format. Please select another format.")
		result['error'] = {
			'message': "Track is not available in Reality Audio 360.",
			'data': track
		}
		if socket:
			queueItem['failed'] += 1
			socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True, 'data': track, 'error': "Track is not available in Reality Audio 360."})
		return result
	track['selectedFormat'] = format
	track['selectedFilesize'] = filesize
	track['album']['bitrate'] = format
	track['album']['picUrl'] = "https://e-cdns-images.dzcdn.net/images/cover/{}/{}x{}-000000-80-0-0.{}".format(track['album']['pic'], settings['embeddedArtworkSize'], settings['embeddedArtworkSize'], 'png' if settings['PNGcovers'] else 'jpg')
	track['dateString'] = formatDate(track['date'], settings['dateFormat'])
	track['album']['dateString'] = formatDate(track['album']['date'], settings['dateFormat'])

	# Check if user wants the feat in the title
	# 0 => do not change
	# 1 => remove from title
	# 2 => add to title
	if settings['featuredToTitle'] == "1":
		track['title'] = track['title_clean']
	elif settings['featuredToTitle'] == "2":
		track['title'] = track['title_feat']

	# Remove (Album Version) from tracks that have that
	if settings['removeAlbumVersion']:
		if "Album Version" in track['title']:
			track['title'] = re.sub(r' ?\(Album Version\)', "", track['title']).strip()

	# Generate artist tag if needed
	if settings['tags']['multitagSeparator'] != "default":
		if settings['tags']['multitagSeparator'] == "andFeat":
			track['artistsString'] = track['mainArtistsString']
			if 'featArtistsString' in track and settings['featuredToTitle'] != "2":
				track['artistsString'] += " "+track['featArtistsString']
		else:
			track['artistsString'] = settings['tags']['multitagSeparator'].join(track['artists'])
	else:
		track['artistsString'] = ", ".join(track['artists'])

	# Change Title and Artists casing if needed
	if settings['titleCasing'] != "nothing":
		track['title'] = changeCase(track['title'], settings['titleCasing'])
	if settings['artistCasing'] != "nothing":
		track['artistsString'] = changeCase(track['artistsString'], settings['artistCasing'])
		for i, artist in enumerate(track['artists']):
			track['artists'][i] = changeCase(artist, settings['artistCasing'])

	# Generate filename and filepath from metadata
	filename = generateFilename(track, trackAPI, settings)
	(filepath, artistPath, coverPath, extrasPath) = generateFilepath(track, trackAPI, settings)

	if 'cancel' in queueItem:
		result['cancel'] = True
		return result
	# Download and cache coverart
	track['album']['picPath'] = os.path.join(TEMPDIR, f"alb{track['album']['id']}_{settings['embeddedArtworkSize']}.{'png' if settings['PNGcovers'] else 'jpg'}")
	track['album']['picPath'] = downloadImage(track['album']['picUrl'], track['album']['picPath'])

	if os.path.sep in filename:
		tempPath = filename[:filename.rfind(os.path.sep)]
		filepath = os.path.join(filepath, tempPath)
		filename = filename[filename.rfind(os.path.sep)+len(os.path.sep):]
	makedirs(filepath, exist_ok=True)
	writepath = os.path.join(filepath, filename + extensions[track['selectedFormat']])

	# Save lyrics in lrc file
	if settings['syncedLyrics'] and 'sync' in track['lyrics']:
		with open(os.path.join(filepath, filename + '.lrc'), 'w') as f:
			f.write(track['lyrics']['sync'])

	# Save local album art
	if coverPath:
		result['albumURL'] = track['album']['picUrl'].replace(f"{settings['embeddedArtworkSize']}x{settings['embeddedArtworkSize']}", f"{settings['localArtworkSize']}x{settings['localArtworkSize']}")
		result['albumPath'] = os.path.join(coverPath, f"{settingsRegexAlbum(settings['coverImageTemplate'], track['album'], settings)}.{'png' if settings['PNGcovers'] else 'jpg'}")

	# Save artist art
	if artistPath:
		result['artistURL'] = "https://e-cdns-images.dzcdn.net/images/artist/{}/{}x{}-000000-80-0-0.{}".format(track['album']['mainArtist']['pic'], settings['localArtworkSize'], settings['localArtworkSize'], 'png' if settings['PNGcovers'] else 'jpg')
		result['artistPath'] = os.path.join(artistPath, f"{settingsRegexArtist(settings['artistImageTemplate'], track['album']['mainArtist'], settings)}.{'png' if settings['PNGcovers'] else 'jpg'}")

	# Data for m3u file
	if extrasPath:
		result['extrasPath'] = extrasPath
		result['playlistPosition'] = writepath[len(extrasPath):]

	track['downloadUrl'] = dz.get_track_stream_url(track['id'], track['MD5'], track['mediaVersion'], track['selectedFormat'])
	try:
		with open(writepath, 'wb') as stream:
			stream_track(dz, track, stream, trackAPI, queueItem, socket)
	except downloadCancelled:
		remove(writepath)
		result['cancel'] = True
		return result
	except HTTPError:
		remove(writepath)
		if track['selectedFormat'] == 9 and settings['fallbackBitrate']:
			print("Track not available in flac, trying mp3")
			track['filesize']['flac'] = 0
			return downloadTrackObj(dz, trackAPI, settings, bitrate, queueItem, extraTrack=track, socket=socket)
		elif track['fallbackId'] != 0:
			print("Track not available, using fallback id")
			trackNew = dz.get_track_gw(track['fallbackId'])
			if not 'MD5_ORIGIN' in trackNew:
				trackNew['MD5_ORIGIN'] = dz.get_track_md5(trackNew['SNG_ID'])
			track = parseEssentialTrackData(track, trackNew)
			return downloadTrackObj(dz, trackAPI, settings, bitrate, queueItem, extraTrack=track, socket=socket)
		elif not 'searched' in track and settings['fallbackSearch']:
			print("Track not available, searching for alternative")
			searchedId = dz.get_track_from_metadata(track['mainArtist']['name'], track['title'], track['album']['title'])
			if searchedId != 0:
				trackNew = dz.get_track_gw(searchedId)
				if not 'MD5_ORIGIN' in trackNew:
					trackNew['MD5_ORIGIN'] = dz.get_track_md5(trackNew['SNG_ID'])
				track = parseEssentialTrackData(track, trackNew)
				track['searched'] = True
				return downloadTrackObj(dz, trackAPI, settings, bitrate, queueItem, extraTrack=track, socket=socket)
			else:
				print("ERROR: Track not available on deezer's servers and no alternative found!")
				result['error'] = {
					'message': "Track not available on deezer's servers and no alternative found!",
					'data': track
				}
				if socket:
					queueItem['failed'] += 1
					socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True, 'data': track, 'error': "Track not available on deezer's servers and no alternative found!"})
				return result
		else:
			print("ERROR: Track not available on deezer's servers!")
			result['error'] = {
				'message': "Track not available on deezer's servers!",
				'data': track
			}
			if socket:
				queueItem['failed'] += 1
				socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True, 'data': track, 'error': "Track not available on deezer's servers!"})
			return result
	if track['selectedFormat'] in [3, 1, 8]:
		tagID3(writepath, track, settings['tags'])
	elif track['selectedFormat'] == 9:
		tagFLAC(writepath, track, settings['tags'])
	if 'searched' in track:
		result['searched'] = f'{track["mainArtist"]["name"]} - {track["title"]}'
	print("Done!")
	if socket:
		queueItem['downloaded'] += 1
		socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'downloaded': True})
	return result

def downloadTrackObj_wrap(dz, track, settings, bitrate, queueItem, socket):
	try:
		result = downloadTrackObj(dz, track, settings, bitrate, queueItem, socket=socket)
	except Exception as e:
		result = {'error': {
				'message': str(e),
				'data': {
					'id': track['SNG_ID'],
					'title': track['SNG_TITLE'] + (" "+track['VERSION'] if 'VERSION' in track and track['VERSION'] else ""),
					'mainArtist': {'name': track['ART_NAME']}
				}
			}
		}
		if socket:
			queueItem['failed'] += 1
			socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True})
	return result

def download(dz, queueItem, socket=None):
	global downloadPercentage, lastPercentage
	settings = queueItem['settings']
	bitrate = queueItem['bitrate']
	downloadPercentage = 0
	lastPercentage = 0
	if 'single' in queueItem:
		try:
			result = downloadTrackObj(dz, queueItem['single'], settings, bitrate, queueItem, socket=socket)
		except Exception as e:
			result = {'error': {
					'message': str(e),
					'data': {
						'id': queueItem['single']['SNG_ID'],
						'title': queueItem['single']['SNG_TITLE'] + (" "+queueItem['single']['VERSION'] if 'VERSION' in queueItem['single'] and queueItem['single']['VERSION'] else ""),
						'mainArtist': {'name': queueItem['single']['ART_NAME']}
					}
				}
			}
			if socket:
				queueItem['failed'] += 1
				socket.emit("updateQueue", {'uuid': queueItem['uuid'], 'failed': True})
		download_path = after_download_single(result, settings, queueItem)
	elif 'collection' in queueItem:
		print("Downloading collection")
		playlist = [None] * len(queueItem['collection'])
		with ThreadPoolExecutor(settings['queueConcurrency']) as executor:
			for pos, track in enumerate(queueItem['collection'], start=0):
				playlist[pos] = executor.submit(downloadTrackObj_wrap, dz, track, settings, bitrate, queueItem, socket=socket)
		download_path = after_download(playlist, settings, queueItem)
	if socket:
		if 'cancel' in queueItem:
			socket.emit('toast', {'msg': "Current item cancelled.", 'icon':'done', 'dismiss': True, 'id':'cancelling_'+queueItem['uuid']})
			socket.emit("removedFromQueue", queueItem['uuid'])
		else:
			socket.emit("finishDownload", queueItem['uuid'])
	return {
		'dz': dz,
		'socket': socket,
		'download_path': download_path
	}

def after_download(tracks, settings, queueItem):
	extrasPath = None
	playlist = [None] * len(tracks)
	errors = ""
	searched = ""
	for index in range(len(tracks)):
		result = tracks[index].result()
		if 'cancel' in result:
			return None
		if 'error' in result:
			errors += f"{result['error']['data']['id']} | {result['error']['data']['mainArtist']['name']} - {result['error']['data']['title']} | {result['error']['message']}\r\n"
		if 'searched' in result:
			searched += result['searched']+"\r\n"
		if not extrasPath and 'extrasPath' in result:
			extrasPath = result['extrasPath']
		if settings['saveArtwork'] and 'albumPath' in result:
			downloadImage(result['albumURL'], result['albumPath'])
		if settings['saveArtworkArtist'] and 'artistPath' in result:
			downloadImage(result['artistURL'], result['artistPath'])
		if 'playlistPosition' in result:
			playlist[index] = result['playlistPosition']
		else:
			playlist[index] = ""
	if not extrasPath:
		extrasPath = settings['downloadLocation']
	if settings['logErrors'] and errors != "":
		with open(os.path.join(extrasPath, 'errors.txt'), 'w') as f:
			f.write(errors)
	if settings['logSearched'] and searched != "":
		with open(os.path.join(extrasPath, 'searched.txt'), 'w') as f:
			f.write(searched)
	if settings['createM3U8File']:
		with open(os.path.join(extrasPath, 'playlist.m3u8'), 'w') as f:
			for line in playlist:
				f.write(line+"\n")
	if settings['executeCommand'] != "":
		execute(settings['executeCommand'].replace("%folder%", extrasPath))
	return extrasPath

def after_download_single(track, settings, queueItem):
	if 'cancel' in track:
		return None
	if 'extrasPath' not in track:
		track['extrasPath'] = settings['downloadLocation']
	if settings['logSearched'] and 'searched' in track:
		with open(os.path.join(track['extrasPath'], 'searched.txt'), 'w+') as f:
			orig = f.read()
			if not track['searched'] in orig:
				if orig != "":
					orig += "\r\n"
				orig += track['searched']+"\r\n"
			f.write(orig)
	if settings['executeCommand'] != "":
		execute(settings['executeCommand'].replace("%folder%", track['extrasPath']))
	return track['extrasPath']

class downloadCancelled(Exception):
    """Base class for exceptions in this module."""
    pass