Chat flood protection

#include <a_samp>

// Limits you to a maximum of 10 bits of text in any 60s period
#define TIME_LIMIT  60000
#define MAX_TEXT    10

// Comment out the following lines to customise the code
#define PROTECT_TEXT    // Filter text
#define PROTECT_PMS     // Filter PMs
#define PROTECT_CMD     // Filter Commands

#define IGNORE_ADMINS   // Let admins talk as much as they like

#define WARN_PLAYER     // Send the player a flood exceeded message

#if defined WARN_PLAYER

    // Color for warning message to be displayed in (red)
    #define WARN_COLOR 0xFF0000AA

    // UNCOMMENT ONE OF THE FOLLOWING
    // OR WRITE YOUR OWN MESSAGE

    // Message to be displayed to the player - without time
    //#define WARN_MESSAGE "*** Flood limit exceeded, please try again in a moment"

    // Message to be displayed to the player - with time
    #define WARN_MESSAGE "*** Flood limit exceeded, please try again in %d seconds"

#endif

/*
================================================================================

                        Edit ABOVE this line!
            And where marked below for flitered commands

================================================================================
*/

#if !defined PROTECT_TEXT && !defined PROTECT_PMS && !defined PROTECT_CMD
    #error "You must filter somthing! - Make sure a PROTECT_XXX is uncommented."
#endif


public OnFilterScriptInit()
{
    print("\n---------------------------------------");
    print("|    Flood protection filterscript    |");
    print("|        (c) SA:MP team - 2007        |");
    print("---------------------------------------\n");
    return 1;
}

#if defined PROTECT_TEXT

    // Check for floods on standard text
    public OnPlayerText(playerid, text[])
    {
        // Call one function to reduce globals and combine flooding checks
        if (!CheckFlooding(playerid)) return 1;
        return 0;
        #pragma unused text
    }

#endif

#if defined PROTECT_PMS

    // Check for floods on private messages
    public OnPlayerPrivmsg(playerid, recieverid, text[])
    {
        if (!CheckFlooding(playerid)) return 1;
        return 0;
        #pragma unused recieverid, text
    }

#endif

#if defined PROTECT_CMD

    // Check for floods on specific commands
    public OnPlayerCommandText(playerid, cmdtext[])
    {
/*
================================================================================

                        Edit BELOW this line!
            Put command names you want flood protected here

================================================================================
*/
        static sFilteredCommands[][] =
        {
            "/me",
            "/say",
            "/announce"
        };
/*
================================================================================

                        Edit ABOVE this line!

================================================================================
*/
        // More processing required so save time here
        #if defined IGNORE_ADMINS
            if (IsPlayerAdmin(playerid)) return 0;
        #endif
        // Loop through text based commands
        for (new i = 0; i < sizeof (sFilteredCommands); i++)
        {
            // If we have this command in the list
            if (!strcmp(cmdtext, sFilteredCommands[i]))
            {
                // Faster than two strlens
                new len = strlen(sFilteredCommands[i]);
                // Check command, e.g. /me not /meths
                if (cmdtext[len] == '\0' || cmdtext[len] == ' ')
                {
                    // Mark as command processed
                    if (CheckFlooding(playerid)) return 1;
                    // Break out
                    break;
                }
            }
        }
        return 0;
        #pragma unused cmdtext
    }

#endif

#define CEIL_DIV(%1,%2) (((%1) + (%2) - 1) / (%2))

#if !defined WARN_COLOR
    #define WARN_COLOR 0xFF0000AA
#endif

#if !defined WARN_MESSAGE
    #define WARN_MESSAGE "*** Flood limit exceeded, please try again in %d seconds"
#endif

#if !defined TIME_LIMIT
    #define TIME_LIMIT 60000
#endif

#if !defined MAX_TEXT
    #define MAX_TEXT 10
#endif

CheckFlooding(playerid)
{
    // Holds the times of the last MAX_TEXT messages
    static sTextTimes[MAX_PLAYERS][MAX_TEXT];
    // Holds the current stack pointer for new messages
    static sTextIndex[MAX_PLAYERS];
    #if defined IGNORE_ADMINS
        // If admins aren't flood protected break out
        if (IsPlayerAdmin(playerid)) return 0;
    #endif
    // Works on Linux and Windows now
    new tickCount = GetTickCount();
    // Get the current point in the flood time array
    new index = sTextIndex[playerid];
    // Check this is less than the flood cutoff (normally MAX_TEXT before)
    if (sTextTimes[playerid][index] <= (tickCount - TIME_LIMIT))
    {
        // Save the new time
        sTextTimes[playerid][index] = tickCount;
        // Increment to the next messages time
        index++;
        // Wrap around
        index %= MAX_TEXT;
        // Save this value statically
        sTextIndex[playerid] = index;
        // Mark as OK
        return 0;
    }
    #if defined WARN_PLAYER
        new str[128]; // More than enough normally
        // Calculate the time remaining in seconds
        format(str, sizeof (str), WARN_MESSAGE, CEIL_DIV(TIME_LIMIT - (tickCount - sTextTimes[playerid][index]), 1000));
        // Send the client their warning
        SendClientMessage(playerid, WARN_COLOR, str);
    #endif
    // Mark as bad
    return 1;
}