def handle_command(command)
  reply = {}

  command_parts = command.split(" ")
  command = command_parts[0]
  args = command_parts[1..-1]

  case command
  when "get-ws"
    monitor = args[0] ? $monitors[args[0].to_sym] : current_monitor
    return reply if monitor.nil?
    reply[:workspace] = monitor[:selected_workspace]
    reply[:monitor] = $monitors.key(monitor)
    reply[:count] = monitor[:workspaces].length
  when "set-ws"
    monitor = args[1] ? $monitors[args[1].to_sym] : current_monitor
    return reply if monitor.nil?
    select_workspace args[0].to_i, monitor
    reply[:workspace] = monitor[:selected_workspace]
    reply[:monitor] = $monitors.key(monitor)
    reply[:count] = monitor[:workspaces].length
  when "topped"
    reply[:topped] = $topped_windows
  when "stop"
    exit 1
  end

  reply
end