Class: Pondize::Convert

Inherits:
Object
  • Object
show all
Defined in:
lib/pondize/runner.rb

Constant Summary collapse

CIRCLE = 
"fcgdaeb"
ACCIDENTALS = 
['l', 'n', 's']
OCTAVES = 
[",", "'"]

Instance Method Summary collapse

Constructor Details

#initialize(key_signature, chars) ⇒ Convert

Returns a new instance of Convert.



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# File 'lib/pondize/runner.rb', line 24

def initialize key_signature, chars
  @key_signature = key_signature
  @chars = chars
end

Instance Method Details

#change_to ⇒ Object 



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# File 'lib/pondize/runner.rb', line 46

def change_to
  if @key_signature > 0
    return 's'
  end
  if @key_signature < 0
    return 'f'
  end
  ''
end

#notes_to_change ⇒ Object 



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# File 'lib/pondize/runner.rb', line 56

def notes_to_change
  if @key_signature > 0
    return CIRCLE[0...@key_signature]
  end
  if @key_signature < 0
    return CIRCLE[@key_signature..-1]
  end
  []
end

#pondize(chars = nil) ⇒ Object 



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# File 'lib/pondize/runner.rb', line 29

def pondize chars = nil
  @chars = chars || @chars
  @chars.each_char
    .map
    .with_index { |char, index| (notes_to_change.include?(char) && !ACCIDENTALS.include?(@chars[index + 1]) ) ? "#{char}#{change_to}" : char }
    .map.with_index { |char, index| (ACCIDENTALS + OCTAVES).include?(@chars[index + 1]) ? char : "#{char} " }
    .join('')
    .gsub('n', '')
    .gsub(/ (\d)/, '\1')
    .gsub(/ -(\d)/, '-\1')
    .gsub('< <', '<<')
    .gsub('> >', '>>')
    .gsub(' .', '.')
    .gsub('l', 'f')
    .strip
end