class Solargraph::LanguageServer::Message::TextDocument::Formatting

def format original, result
  lines = result.lines
  index = lines.index{|l| l.start_with?('====================')}
  formatted = lines[index+1..-1].join
  # The response is required to send an explicit range. Text edits

  # with null ranges get ignored. See castwide/vscode-solargraph#83

  if original.end_with?("\n")
    ending = {
      line: original.lines.length,
      character: 0
    }
  else
    ending = {
      line: original.lines.length - 1,
      character: original.lines.last.length
    }
  end
  set_result(
    [
      {
        range: {
          start: {
            line: 0,
            character: 0
          },
          end: ending
        },
        newText: formatted
      }
    ]
  )
end

def process
  filename = uri_to_file(params['textDocument']['uri'])
  filename = 'tmp.rb' if filename.nil? or filename.empty?
  original = host.read_text(params['textDocument']['uri'])
  cmd = "rubocop -a -f fi -s #{Shellwords.escape(filename)}"
  o, e, s = Open3.capture3(cmd, stdin_data: original)
  return format(original, o) if o && !o.empty?
  set_error(Solargraph::LanguageServer::ErrorCodes::INTERNAL_ERROR, e)
end