zd.ps1

# Zotify Downloader wrapper - OPUS FORMAT
# parameter = Spotify-URL 
# Assumes installation of LLzotify https://github.com/lolo83560/LLzotify

param (
	[string]$url
)

# if no parameters give, display usage info
if ($psboundparameters.count -eq 0)
{
		"Usage: ZD `<spotify URL`>"
		exit
}

# trim ?si=... option at the end of url
# these occur when copied from spot/spotx app
# e.g. 'https://open.spotify.com/playlist/3DuMUKpBVP6lIaQEEmye5j?si=933eb6420de54795

$url = $url -replace '(.*?)\?.*$','$1'

# retrieve page title from Spotify URL webpage
$page = Invoke-webrequest -Uri $url
$page.content -match "<title>(.+)</title>" | out-null	# get the <title> section
$title = $matches[1]
$title -match "(.*) \| Spotify" | out-null				# remove the ' | Spotify' right part
$temppath = $matches[1]

# replace problem chars for filenames [ < > : " / \ | ? * ] with a dash 
$localpath = $temppath -replace '[\<\>\:\"\/\\\|\?\*]','-'

#dbg write-host [$url] [$localPath]

# from the URL, get the download type (track/album/playlist/episode/artist) & Spotify ID, transform into URI
$url -match "^.*/(.*?)/(.*?)$" | out-null	
$DLDtype = $matches[1]
$spotID = $matches[2]
$spoturi = "spotify:" + $DLDtype + ":" + $spotID

#dbg write-host [$DLDtype] [$spotID] [$spoturi]

$rootpath = ".\\" # + $localpath

$output = switch ($DLDtype) {
   "playlist" { "{playlist}/{playlist_num} - {artist} - {song_name}.opus" ; break}
   "artist"   { "{artist}/{album}/{track_number} - {song_name}.opus" ; break}
   "album"    { "{artist}/{album}/{track_number} - {song_name}.opus" ; break}
   "track"    { "{artist}/{album} - {track_number} - {song_name}.opus" ; break}
   "episode"  { "{artist}/{song_name}.opus"; break}
   default    { "{artist}/{song_name}.opus"; break}
}



# make unique name for logfile, generated from $localpath hash 
$md5 = New-Object -TypeName System.Security.Cryptography.MD5CryptoServiceProvider
$hash = [System.BitConverter]::ToString($md5.ComputeHash([System.Text.Encoding]::UTF8.GetBytes($localpath))).Replace("-", "").ToLower()
$logfilename = 'log-'+$hash+'.txt'

# now go ahead loop it till completion
$iteration = 1
$startime = get-date
do {
	
	# add command line on top of logfile for easier rerun
	"zd $url" | out-file $logfilename
	
	$("=" * 80)
	$("-" * $localpath.length)
	$localpath
	$("-" * $localpath.length)
	">>>> ITERATION $iteration <<<<"
	$("=" * 80)
	"Log file name: $logfilename"
	"URL: $url"
	$("=" * 80)

#	if ($iteration -gt 1) { 		# beginnning at 2nd iteration, pause 30s to let Spotify cool down
#		" "
#		"~~~~~~~ waiting 30s to let Spotify server cool down :) ~~~~~~~"
#		" "
#		start-sleep -seconds 30 
#	}	
	
	# run Zotify download on url
	# assume spotify credentials stored into C:\Users\<your_name>\AppData\Roaming\Zotify\credentials.json
	# Hint: to regenerate 
	#       -> use librespot-auth making sure turning firewall off
	#          install this one, better https://github.com/ManiArasteh/librespot-auth.git
	zotify --root-path $rootpath --output $output --retry-attempts 5 --print-download-progress=false --download-lyrics=false --download-format opus --download-quality high $spoturi 2>&1 | Tee-Object -file $logfilename -append

	$logerr = get-content $logfilename
	$iteration++
	"ErrGal " + ($logerr -match 'GENERAL DOWNLOAD ERROR').count
	"ErrKey " + ($logerr -match 'Audio key error').count
	"ErrCod " + ($logerr -match 'Traceback \(most recent call last\)').count
}
while ( 
		(($logerr -match 'GENERAL DOWNLOAD ERROR').count -ne 0) -or 
		(($logerr -match 'Audio key error').count -ne 0) -or
		(($logerr -match 'Traceback \(most recent call last\)').count -ne 0)
	)
$stoptime = get-date
remove-item -force $logfilename
"                                          "
"██████   ██████  ███    ██ ███████     ██ "
"██   ██ ██    ██ ████   ██ ██          ██ "
"██   ██ ██    ██ ██ ██  ██ █████       ██ "
"██   ██ ██    ██ ██  ██ ██ ██             "
"██████   ██████  ██   ████ ███████     ██ "
"                                          "
$deltime = ( "{0:hh\:mm\:ss}" -f [timespan]::fromseconds(($stoptime-$startime).totalseconds) )
'Time taken H:M:S: '+$deltime
"Iterations : $iteration"