Class: Coltrane::Cli::Scale

Inherits:
Object
  • Object
show all
Defined in:
lib/cli/scale.rb

Overview

Interfaces commands with the scales functionality

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(scale, on: :text, flavor: 'degrees') ⇒ Scale

Returns a new instance of Scale.



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# File 'lib/cli/scale.rb', line 46

def initialize(scale, on: :text, flavor: 'degrees')
  desc = "This is the #{scale.tone.name} #{scale.name} scale:"
  Coltrane::Cli::Notes.new(scale.notes, on: on, desc: desc, flavor: flavor)
end

Class Method Details

.find(notes: [], chords: []) ⇒ Object 



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# File 'lib/cli/scale.rb', line 12

def self.find(notes: [], chords: [])
  if notes.any?
    puts "\nSearching for scales containing #{notes.join(', ')}:\n\n"
    notes = NoteSet[*notes]
  elsif chords.any?
    puts "\nSearching for scales containing #{chords.join(', ')}:\n\n"
    notes = chords.reduce(NoteSet[]) do |memo, c|
      memo + Coltrane::Chord.new(name: c).notes
    end
  else raise BadFindScales
  end
  render_search(notes)
  puts "\nUnderlined means the scale has all notes"
end

.parse(str) ⇒ Object 



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# File 'lib/cli/scale.rb', line 7

def self.parse(str)
  *scale_name, tone = str.split('-')
  Coltrane::Scale.fetch(scale_name.join('_'), tone)
end

.render_search(searched_notes) ⇒ Object 



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# File 'lib/cli/scale.rb', line 27

def self.render_search(searched_notes)
  search = Coltrane::Scale.having_notes(searched_notes)
  output = []
  scale_width = search.results.keys.map(&:size).max
  search.results.each do |name, scales_by_tone|
    output << name.ljust(scale_width + 1, ' ')
    scales_by_tone.each do |tone_number, notes|
      p     = (notes.size.to_f / searched_notes.size) * 100
      l     = p == 100 ? p : (p + 20) * 0.4
      und   = p == 100 ? :underline : nil
      color = Color::HSL.new(30, p, l / 2).html
      output << Paint["#{Note[tone_number].name}(#{notes.size})", color, und]
      output << ' '
    end
    output << "\n"
  end
  puts output.join
end