Class: HeadMusic::Style::Guidelines::MinimumNotes

Inherits:
Annotation
  • Object
show all
Defined in:
lib/head_music/style/guidelines/minimum_notes.rb

Overview

Flags a melody with fewer than the required number of notes. Configure the threshold with the factory, e.g. MinimumNotes.with(8).

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

This class inherits a constructor from HeadMusic::Style::Annotation

Class Method Details

.with(minimum) ⇒ Object 



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# File 'lib/head_music/style/guidelines/minimum_notes.rb', line 7

def self.with(minimum)
  super(minimum: minimum)
end

Instance Method Details

#deficiency_mark ⇒ Object (private) 



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# File 'lib/head_music/style/guidelines/minimum_notes.rb', line 33

def deficiency_mark
  return unless notes.length < minimum

  HeadMusic::Style::Mark.for_all(placements, fitness: notes.length.to_f / minimum)
end

#marks ⇒ Object 



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# File 'lib/head_music/style/guidelines/minimum_notes.rb', line 11

def marks
  placements.empty? ? no_placements_mark : deficiency_mark
end

#message ⇒ Object 



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# File 'lib/head_music/style/guidelines/minimum_notes.rb', line 15

def message
  "Write at least #{minimum.humanize} notes."
end

#minimum ⇒ Object (private) 



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# File 'lib/head_music/style/guidelines/minimum_notes.rb', line 21

def minimum
  options.fetch(:minimum)
end

#no_placements_mark ⇒ Object (private) 



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# File 'lib/head_music/style/guidelines/minimum_notes.rb', line 25

def no_placements_mark
  HeadMusic::Style::Mark.new(
    HeadMusic::Content::Position.new(composition, "1:1"),
    HeadMusic::Content::Position.new(composition, "2:1"),
    fitness: 0
  )
end