# encoding: UTF-8

class String
  TRANSLIT_CYRILLIC = %Q{АБВГДЕЁЗИЙКЛМНОПРСТУФЪЫЬЭабвгдеёзийклмнопрстуфъыьэ}
  TRANSLIT_LATIN = %Q{ABVGDEEZIJKLMNOPRSTUF"Y'Eabvgdeezijklmnoprstuf"y'e}
  TRANSLIT_DOUBLES = {'Ж'=>'ZH', 'Х'=>'KH', 'Ц'=>'TS', 'Ч'=>'CH', 'Ш'=>'SH', 'Щ'=>'SHCH', 'Ю'=>'YU', 'Я'=>'YA',
                      'ж'=>'zh', 'х'=>'kh', 'ц'=>'ts', 'ч'=>'ch', 'ш'=>'sh', 'щ'=>'shch', 'ю'=>'yu', 'я'=>'ya'}

  # Performs basic transliteration from Cyrillic to Latin characters and standard character combinations
  def translit!
    TRANSLIT_DOUBLES.each {|key, value| self.gsub!(key, value)}
    self.tr!(TRANSLIT_CYRILLIC, TRANSLIT_LATIN)
    self
  end

  # Turns string into appropriate class constant, returns nil if class not found
  def to_class
    klass = self.split("::").inject(Kernel) do |namespace, const|
      const == '' ? namespace : namespace.const_get(const)
    end
    klass.is_a?(Class) ? klass : nil
  rescue NameError
    nil
  end

  # Turns string into snake_case
  def snake_case
    gsub(/([a-z])([A-Z0-9])/, '\1_\2' ).downcase
  end

  # Turns string into CamelCase
  def camel_case
    if self.include? '_'
      self.split('_').map{|e| e.capitalize}.join
    else
      unless self =~ (/^[A-Z]/)
        self.capitalize
      else
        self
      end
    end
  end
end