Module: Cyrillic::UaPassport

Defined in:
lib/cyrillic/ua_passport.rb

Constant Summary collapse

CHARACTER_TABLE = 
k.zip(v).to_h.freeze

Class Method Summary collapse

Class Method Details

.transliterate(str = "") ⇒ Object 



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# File 'lib/cyrillic/ua_passport.rb', line 11

def transliterate(str = "")
  return "" if str.nil? || str.empty?

  str = str.to_s.gsub('Зг', 'Zgh').gsub('зг', 'zgh')

  result = +""
  str.each_char.with_index do |char, index|
    prev_char = index.positive? ? str[index - 1] : nil
    is_word_start = prev_char.nil? || prev_char == ' '

    case char
    when 'Є'
      result << (is_word_start ? 'Ye' : 'Ie')
    when 'є'
      result << (is_word_start ? 'ye' : 'ie')
    when 'Ї'
      result << (is_word_start ? 'Yi' : 'I')
    when 'ї'
      result << (is_word_start ? 'yi' : 'i')
    when 'Й'
      result << (is_word_start ? 'Y' : 'I')
    when 'й'
      result << (is_word_start ? 'y' : 'i')
    when 'Ю'
      result << (is_word_start ? 'Yu' : 'Iu')
    when 'ю'
      result << (is_word_start ? 'yu' : 'iu')
    when 'Я'
      result << (is_word_start ? 'Ya' : 'Ia')
    when 'я'
      result << (is_word_start ? 'ya' : 'ia')
    when 'Ь', 'ь', "'"
      # Ignored in transliteration
    else
      result << (CHARACTER_TABLE[char] || char)
    end
  end
  result
end