/**

 * vim: set ts=4 :

 * =============================================================================

 * SourceMod Anti-Flood Plugin

 * Protects against chat flooding.

 *

 * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

 * =============================================================================

 *

 * This program is free software; you can redistribute it and/or modify it under

 * the terms of the GNU General Public License, version 3.0, as published by the

 * Free Software Foundation.

 * 

 * This program is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS

 * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more

 * details.

 *

 * You should have received a copy of the GNU General Public License along with

 * this program.  If not, see <http://www.gnu.org/licenses/>.

 *

 * As a special exception, AlliedModders LLC gives you permission to link the

 * code of this program (as well as its derivative works) to "Half-Life 2," the

 * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software

 * by the Valve Corporation.  You must obey the GNU General Public License in

 * all respects for all other code used.  Additionally, AlliedModders LLC grants

 * this exception to all derivative works.  AlliedModders LLC defines further

 * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),

 * or <http://www.sourcemod.net/license.php>.

 *

 * Version: $Id$

 */

#pragma semicolon 1

#include <sourcemod>

public Plugin:myinfo = 

{

	name = "Anti-Flood",

	author = "AlliedModders LLC",

	description = "Protects against chat flooding",

	version = SOURCEMOD_VERSION,

	url = "http://www.sourcemod.net/"

};

new Float:g_LastTime[MAXPLAYERS + 1] = {0.0, ...};		/* Last time player used say or say_team */

new g_FloodTokens[MAXPLAYERS + 1] = {0, ...};			/* Number of flood tokens player has */

new Handle:sm_flood_time;								/* Handle to sm_flood_time convar */

public OnPluginStart()

{

	sm_flood_time = CreateConVar("sm_flood_time", "0.75", "Amount of time allowed between chat messages");

}

public OnClientPutInServer(client)

{

	g_LastTime[client] = 0.0;

	g_FloodTokens[client] = 0;

}

new Float:max_chat;

public bool:OnClientFloodCheck(client)

{

	max_chat = GetConVarFloat(sm_flood_time);

	if (max_chat <= 0.0 

		|| (GetUserFlagBits(client) & ADMFLAG_ROOT) == ADMFLAG_ROOT)

	{

		return false;

	}

	PrintToServer("OCFC: %f %f %d", g_LastTime[client], GetGameTime(), g_FloodTokens[client]);

	if (g_LastTime[client] > GetGameTime())

	{

		/* If player has 3 or more flood tokens, block their message */

		if (g_FloodTokens[client] >= 3)

		{

			return true;

		}

	}

	return false;

}

public OnClientFloodResult(client, bool:blocked)

{

	if (max_chat <= 0.0 

		|| (GetUserFlagBits(client) & ADMFLAG_ROOT) == ADMFLAG_ROOT)

	{

		return;

	}

	new Float:curTime = GetGameTime();

	new Float:newTime = curTime + max_chat;

	PrintToServer("OCFR: %f, %f", g_LastTime[client], GetGameTime());

	if (g_LastTime[client] > curTime)

	{

		/* If the last message was blocked, update their time limit */

		if (blocked)

		{

			newTime += 3.0;

		}

		/* Add one flood token when player goes over chat time limit */

		else if (g_FloodTokens[client] < 3)

		{

			g_FloodTokens[client]++;

		}

	}

	else if (g_FloodTokens[client] > 0)

	{

		/* Remove one flood token when player chats within time limit (slow decay) */

		g_FloodTokens[client]--;

	}

	g_LastTime[client] = newTime;

}