class Solargraph::LanguageServer::Message::Extended::CheckGemVersion

def process
  begin
    fetcher = Gem::SpecFetcher.new
    tuple = fetcher.search_for_dependency(Gem::Dependency.new('solargraph')).flatten.first
    if tuple.nil?
      msg = "An error occurred checking the Solargraph gem version."
      STDERR.puts msg
      host.show_message(msg, MessageTypes::ERROR) if params['verbose']
    else
      available = Gem::Version.new(tuple.version)
      current = Gem::Version.new(Solargraph::VERSION)
      if available > current
        host.show_message_request "Solagraph gem version #{available} is available.",
                                  LanguageServer::MessageTypes::INFO,
                                  ['Update now'] do |result|
                                    break unless result == 'Update now'
                                    o, s = Open3.capture2("gem update solargraph")
                                    if s == 0
                                      host.show_message 'Successfully updated the Solargraph gem.', LanguageServer::MessageTypes::INFO
                                    else
                                      host.show_message 'An error occurred while updating the gem.', LanguageServer::MessageTypes::ERROR
                                    end
                                  end
      elsif params['verbose']
        host.show_message "The Solargraph gem is up to date (version #{Solargraph::VERSION})."
      end
      set_result({
        installed: current,
        available: available
      })
    end
  rescue Errno::EADDRNOTAVAIL => e
    msg = "Unable to connect to gem source: #{e.message}"
    STDERR.puts msg
    host.show_message(msg, MessageTypes::ERROR) if params['verbose']
  end
end