/floodprotect {
  if %floodProtectEnabled == 1 goto floodProtEnd
  /inc %floodCounter
  if %floodCounter == %maxMessages {
    %fpTime [ $+ [ %floodCounter ] ] = $ctime($asctime)
    if $calc(%fpTime [ $+ [ %floodCounter ] ] - %fpTime1) <= %maxSeconds {
      /fp set protect on
    }
    :shiftFloodMessageTimes
    /inc %i
    if %i == %maxMessages goto endShiftFloodMessageTimes
    %fpTime [ $+ [ %i ] ] = %fpTime [ $+ [ $calc(%i + 1) ] ]
    goto shiftFloodMessageTimes
    :endShiftFloodMessageTimes
    /unset %i
    /dec %floodCounter
    goto floodProtEnd
  }
  %fpTime [ $+ [ %floodCounter ] ] = $ctime($asctime)
  :floodProtEnd
}

/fp {
  if $$1 == set {
    if $$2 == maxmsgs {
      %maxMessages = $$3
      %floodCounter = 0
      /unset %fpTime*
      /echo # maxMessages set to $$3
    }

    if $$2 == duration {
      %floodProtectDuration = $$3
      /echo # duration set to $$3
    }

    if $$2 == maxsecs {
      %maxSeconds = $$3
      /echo # maxSeconds set to $$3
    }

    if $$2 == protect {
      if $$3 == on {
        %floodProtectEnabled = 1
        /timer 1 %floodProtectDuration /fp set protect off
        /echo # Flood protection activated.
      }
      else {
        %floodProtectEnabled = 0
        /echo # Flood protection deactivated.
      }
    }
  }
}