Super simple multi-file rename ruby-script for episodic files. ToDo: Add support for seasons and in-between episode identifiers

rename.rb

folder_path   = "E:/path_to_files/"
regexp       = /(Ep_(?<episode>\d+)_'(?<episode_name>[A-Za-z]+))/
new_filename = "Testname - E<episode> - <episode_name>"

accepted = false
Dir.glob(folder_path + "/*").sort.each do |file|
    ext = File.extname(file)
    old_filename = File.basename(file, File.extname(file))
    
    matches = old_filename.match(regexp)
    if not matches.nil? then
        final_filename = new_filename
    
        [:episode, :episode_name].each do |sym|
           final_filename = final_filename.sub("<#{sym}>", matches[sym])        
        end
        
        final_filename = final_filename + ext
        p "#{old_filename} -> #{final_filename}"
        
        if not accepted then
            p 'Do you want to rename? Y/N?'
            answer = gets.chomp.downcase
            if answer == 'y' then
                accepted = true
            else            
                return
            end
        end
            
        final_fullpath = folder_path + "/" + final_filename
        File.rename(file, final_fullpath)
    end
end