A ruby script for converting Google Play Music playlists to a Soundizz CSV format for importing to Spotify

gpm_json_to_csv.rb

# json_file_path is the response body from some REST endpoint that google play music
# used to return the contents of a playlist as you loaded it in the web UI.
# So you need to have saved this before GPM shut down.
#
# output_csv_file_path will contain a CSV file in a format suitable for https://soundiiz.com/


require 'JSON' 
require 'byebug'
 
raise 'need json_file_path' unless ARGV[0]
json_file_path = ARGV[0]
puts 'json_file_path is ' + json_file_path

raise 'need output_csv_file_path' unless ARGV[1]
output_csv_file_path = ARGV[1]
puts 'output_csv_file_path is ' + output_csv_file_path
puts 

string_input = File.read(json_file_path)
json_input = JSON.parse(string_input)

songs = json_input[1].first

output = "title;artist;album;isrc;\n"

songs.each do |song| 
  title = song[1]
  artist = song[3]
  album = song[4]
  
  output += title
  output += ';'
  output += artist
  output += ';'
  output += album
  output += ';'
  output += ';'
  output += "\n"
end

File.write(output_csv_file_path, output)
puts 'wrote to ' + output_csv_file_path