class PgSearch::Normalizer

def add_normalization(sql_expression)
  if config.ignore.include?(:accents)
    if config.postgresql_version < 90000
      raise PgSearch::NotSupportedForPostgresqlVersion.new(<<-MESSAGE.gsub /^\s*/, '')
        Sorry, {:ignoring => :accents} only works in PostgreSQL 9.0 and above.
        #{config.inspect}
      MESSAGE
    else
      "#{PgSearch.unaccent_function}(#{sql_expression})"
    end
  else
    sql_expression
  end
end

def initialize(config)
  @config = config
end