special_commands.rb

module Sounds::SpecialCommands
  
  # load all the files in lib/special_commands and make their constants available here
  Dir.glob("./lib/special_commands/*.rb").each do |path|
    require path
    const_name = path.file_identifier.camelize
    self.const_set(const_name, Object.const_get("Sounds::#{const_name}")) 
  end

  # When creating a new command make sure to add it to this list
  SpecialCommandList = [:k, :t, :h, :u, :s, :r, :p]

  # keymap
  def k
    puts File.read 'keymap.yml'
  end

  # tempo
  def t
    original_tempo = $tempo_bpm
    next_input = get_char(true)
    cmd = { u: :up, d: :down, '=': :set }[next_input.to_sym]
    result = cmd ? Tempo.send(cmd) : (err && return)
    result || (err && return)
    puts "Changed tempo from #{original_tempo} to #{$tempo_bpm}"
  end

  # help
  def h
    puts introduction
  end

  # metronome
  def u
    $is_metronome_playing = ! $is_metronome_playing
    Thread.new do
      while $is_metronome_playing
        single_beat_duration = 60.0 / $tempo_bpm
        play "metronome/snare" # accent for the measure's beat 1
        ($time_signature).to_i.times do |i|
          sleep single_beat_duration
          play "metronome/kick"
        end
      end
    end
  end

  # time signature
  def s
    puts "\nenter new time signature followed by new line"
    input = gets.chomp
    if input.is_number?
      $time_signature = input.to_f
      puts "changed time signature to #{$time_signature}"
    else
      puts "invalid time signature"
    end 
  end

  # record
  def r
    $is_recording = ! $is_recording
    if $is_recording
      puts "recording".green
      puts "\n  you're live\n\n\n".yellow
      Thread.new do
        @file_id = Time.now.to_i
        `arecord -f cd -t raw | oggenc - -r -o recording/#{@file_id}.ogg > /dev/null 2>&1`
      end
    else
      `pkill arecord`
      puts "please check #{`pwd`.chomp}/recording and ".white_on_red
      puts "press enter when ogg file is ready".white_on_red
      input = gets.chomp
      puts "finished recording to ogg. converting to mp3 ...".white_on_red
      `ffmpeg -i recording/#{@file_id}.ogg recording/#{@file_id}.mp3 > /dev/null 2>&1`
      `rm recording/#{@file_id}.ogg`
      puts "created recording/#{@file_id}.mp3 and removed ogg source".white_on_red
      puts " - - - - ".blue
    end
  end

  # play the last recorded sample, if any
  def p
    $is_last_recording_playing = !$is_last_recording_playing
    if $is_last_recording_playing
      Thread.new do
        path = File.most_recently_edited("./recording/*.mp3")
        Thread.new do
          unless path.blank?
            while $is_last_recording_playing
              Sounds::Base.play_file_with_mpg123 path 
            end
          end
        end
        puts "playing #{path}"
      end
    else
      puts "stopped playback"
    end
  end

end