Class: TwistyPuzzles::LetterScheme

Inherits:
Object
  • Object
show all
Defined in:
lib/twisty_puzzles/letter_scheme.rb

Overview

Letter scheme that maps stickers to letters.

Direct Known Subclasses

BernhardLetterScheme

Instance Method Summary collapse

Constructor Details

#initialize ⇒ LetterScheme

Returns a new instance of LetterScheme.



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# File 'lib/twisty_puzzles/letter_scheme.rb', line 8

def initialize
  alphabet.each do |letter|
    raise "Uncanonical letter #{letter} in alphabet." if letter != canonicalize_letter(letter)
  end
end

Instance Method Details

#alphabet ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/twisty_puzzles/letter_scheme.rb', line 27

def alphabet
  raise NotImplementedError
end

#canonicalize_letter(_letter) ⇒ Object

Raises:

  • (NotImplementedError) 


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# File 'lib/twisty_puzzles/letter_scheme.rb', line 31

def canonicalize_letter(_letter)
  raise NotImplementedError
end

#for_letter(part_type, desired_letter) ⇒ Object 



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# File 'lib/twisty_puzzles/letter_scheme.rb', line 18

def for_letter(part_type, desired_letter)
  canonicalized_letter = canonicalize_letter(desired_letter)
  part_type::ELEMENTS.find { |e| letter(e) == canonicalized_letter }
end

#letter(piece) ⇒ Object 



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# File 'lib/twisty_puzzles/letter_scheme.rb', line 14

def letter(piece)
  alphabet[piece.piece_index]
end

#parse_part(part_type, part_string) ⇒ Object Also known as: parse_buffer 



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# File 'lib/twisty_puzzles/letter_scheme.rb', line 35

def parse_part(part_type, part_string)
  if valid_letter?(part_string)
    for_letter(part_type, part_string)
  else
    part_type.parse(part_string)
  end
end

#valid_letter?(letter) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/twisty_puzzles/letter_scheme.rb', line 23

def valid_letter?(letter)
  alphabet.include?(canonicalize_letter(letter))
end