Class: Coltrane::Commands::Progression

Inherits:
Command
  • Object
show all
Defined in:
lib/coltrane/commands/progression.rb

Constant Summary

Constants inherited from Command

Command::COMMON_OPTIONS

Class Method Summary collapse

Methods inherited from Command

add_shared_option, #custom_guitar, inherited, #render, #renderer_options, subclasses

Class Method Details

.mercenary_init(program) ⇒ Object 



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# File 'lib/coltrane/commands/progression.rb', line 4

def self.mercenary_init(program)
  program.command(:progression) do |c|
    c.syntax 'progression <roman numeral notation> in <key> [--on <instrument>]'
    c.description 'Gives you chords of a progression in a key. Ex: coltrane progression I-IV-iv-V in Am --on guitar'
    add_shared_option(:flavor, c)
    add_shared_option(:on, c)
    add_shared_option(:voicings, c)
    c.action do |(prog, _, key), **options|
      prog
      .tr('-', '_')
      .yield_self { |possible_method|
        if Theory::Progression.respond_to?(possible_method)
          Theory::Progression.send(possible_method, key)
        else
          Theory::Progression.new(prog, key: key)
        end
      }
      .chords
      .each { |chord| Commands::Chords.new(chord, **options).render }
    end
  end
end