Runfile

require 'securerandom'
require 'fileutils'
require 'tempfile'

def sound_name
  SecureRandom.uuid.split('-').first
end

dir :pwd
run :rename do |file|
  parts = file.split('.')
  dir = File.dirname(file)
  new_name = [sound_name(), *parts.slice(1, parts.length)].compact.join('.')
  out = File.join(dir, new_name)
  FileUtils.mv(file, out)
  puts "#{file} -> #{out}"
end

dir :pwd
run :convert do |file|
  name = sound_name()
  out = "#{name}.mp3"
  `ffmpeg -i "#{file}" -q:a 6 "#{out}"`
  unless $?.success?
    $stderr.puts 'Failed to convert.'
    next
  end
  puts "#{file} -> #{out}"
end

dir :pwd
run :waveform do |file|
  temp = Tempfile.new(["#{File.basename(file)}-", '.png'])
  path = temp.path
  temp.close(true)

  `ffmpeg -i "#{file}" -filter_complex \
    "[0:a]aformat=channel_layouts=mono, \
     compand=gain=-6, \
     showwavespic=s=600x120:colors=#9cf42f[fg]; \
     color=s=600x120:color=#44582c, \
     drawgrid=width=iw/10:height=ih/5:color=#9cf42f@0.1[bg]; \
     [bg][fg]overlay=format=rgb,drawbox=x=(iw-w)/2:y=(ih-h)/2:w=iw:h=1:color=#9cf42f" \
    -vframes 1 "#{path}"`

  `open "#{path}"` if $?.success?
end