module ReactOnRails::Helper

def rails_context(server_side: required("server_side"))
  @rails_context ||= begin
    result = {
      railsEnv: Rails.env,
      inMailer: in_mailer?,
      # Locale settings
      i18nLocale: I18n.locale,
      i18nDefaultLocale: I18n.default_locale,
      rorVersion: ReactOnRails::VERSION,
      rorPro: ReactOnRails::Utils.react_on_rails_pro?
    }
    if defined?(request) && request.present?
      # Check for encoding of the request's original_url and try to force-encoding the
      # URLs as UTF-8. This situation can occur in browsers that do not encode the
      # entire URL as UTF-8 already, mostly on the Windows platform (IE11 and lower).
      original_url_normalized = request.original_url
      if original_url_normalized.encoding.to_s == "ASCII-8BIT"
        original_url_normalized = original_url_normalized.force_encoding("ISO-8859-1").encode("UTF-8")
      end
      # Using Addressable instead of standard URI to better deal with
      # non-ASCII characters (see https://github.com/shakacode/react_on_rails/pull/405)
      uri = Addressable::URI.parse(original_url_normalized)
      # uri = Addressable::URI.parse("http://foo.com:3000/posts?id=30&limit=5#time=1305298413")
      result.merge!(
        # URL settings
        href: uri.to_s,
        location: "#{uri.path}#{uri.query.present? ? "?#{uri.query}" : ''}",
        scheme: uri.scheme, # http
        host: uri.host, # foo.com
        port: uri.port,
        pathname: uri.path, # /posts
        search: uri.query, # id=30&limit=5
        httpAcceptLanguage: request.env["HTTP_ACCEPT_LANGUAGE"]
      )
    end
    if ReactOnRails.configuration.rendering_extension
      custom_context = ReactOnRails.configuration.rendering_extension.custom_context(self)
      result.merge!(custom_context) if custom_context
    end
    result
  end
  @rails_context.merge(serverSide: server_side)
end