Module: Sunrise::Utils::Transliteration

Extended by:
Transliteration
Included in:
Transliteration
Defined in:
lib/sunrise/utils/transliteration.rb

Overview

Russian transliteration

Constant Summary collapse

LOWER_SINGLE =

Transliteration heavily based on rutils gem by Julian “julik” Tarkhanov and Co. <rutils.rubyforge.org/> Cleaned up and optimized.

{
  'і' => 'i', 'ґ' => 'g', 'ё' => 'yo', '№' => '#', 'є' => 'e',
  'ї' => 'yi', 'а' => 'a', 'б' => 'b',
  'в' => 'v', 'г' => 'g', 'д' => 'd', 'е' => 'e', 'ж' => 'zh',
  'з' => 'z', 'и' => 'i', 'й' => 'y', 'к' => 'k', 'л' => 'l',
  'м' => 'm', 'н' => 'n', 'о' => 'o', 'п' => 'p', 'р' => 'r',
  'с' => 's', 'т' => 't', 'у' => 'u', 'ф' => 'f', 'х' => 'h',
  'ц' => 'ts', 'ч' => 'ch', 'ш' => 'sh', 'щ' => 'sch', 'ъ' => "'",
  'ы' => 'y', 'ь' => '', 'э' => 'e', 'ю' => 'yu', 'я' => 'ya'
}.freeze
LOWER_MULTI = 
{
  'ье' => 'ie',
  'ьё' => 'ie'
}.freeze
UPPER_SINGLE = 
{
  'Ґ' => 'G', 'Ё' => 'YO', 'Є' => 'E', 'Ї' => 'YI', 'І' => 'I',
  'А' => 'A', 'Б' => 'B', 'В' => 'V', 'Г' => 'G',
  'Д' => 'D', 'Е' => 'E', 'Ж' => 'ZH', 'З' => 'Z', 'И' => 'I',
  'Й' => 'Y', 'К' => 'K', 'Л' => 'L', 'М' => 'M', 'Н' => 'N',
  'О' => 'O', 'П' => 'P', 'Р' => 'R', 'С' => 'S', 'Т' => 'T',
  'У' => 'U', 'Ф' => 'F', 'Х' => 'H', 'Ц' => 'TS', 'Ч' => 'CH',
  'Ш' => 'SH', 'Щ' => 'SCH', 'Ъ' => "'", 'Ы' => 'Y', 'Ь' => '',
  'Э' => 'E', 'Ю' => 'YU', 'Я' => 'YA'
}.freeze
UPPER_MULTI = 
{
  'ЬЕ' => 'IE',
  'ЬЁ' => 'IE'
}.freeze
LOWER = 
LOWER_SINGLE.merge(LOWER_MULTI).freeze
UPPER = 
UPPER_SINGLE.merge(UPPER_MULTI).freeze
MULTI_KEYS = 
LOWER_MULTI.merge(UPPER_MULTI).keys.sort_by { |s| s.length }.reverse.freeze

Instance Method Summary collapse

Instance Method Details

#transliterate(str) ⇒ Object

Transliterate a string with russian characters

Возвращает строку, в которой все буквы русского алфавита заменены на похожую по звучанию латиницу



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# File 'lib/sunrise/utils/transliteration.rb', line 51

def transliterate(str)
  chars = str.scan(/#{MULTI_KEYS.join '|'}|\w|./)

  result = ''

  chars.each_with_index do |char, index|
    result << if UPPER.key?(char) && LOWER.key?(chars[index + 1])
                # combined case
                UPPER[char].downcase.capitalize
              elsif UPPER.key?(char)
                UPPER[char]
              elsif LOWER.key?(char)
                LOWER[char]
              else
                char
              end
  end

  result
end