/**

  * vim: set ts=4 :

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

  * SourceMod

  * Copyright (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: $Id$

  */

 #include <ITextParsers.h>

 #include "ChatTriggers.h"

 #include "sm_stringutil.h"

 #include "ConCmdManager.h"

 #include "PlayerManager.h"

 #include "Translator.h"

 #include "HalfLife2.h"

 /* :HACKHACK: We can't SH_DECL here because ConCmdManager.cpp does.

  * While the OB build only runs on MM:S 1.6.0+ (SH 5+), the older one 

  * can technically be compiled against any MM:S version after 1.4.2.

  */

 #if defined ORANGEBOX_BUILD

 extern bool __SourceHook_FHRemoveConCommandDispatch(void *, bool, class fastdelegate::FastDelegate1<const CCommand &, void>);

 extern int __SourceHook_FHAddConCommandDispatch(void *, ISourceHook::AddHookMode, bool, class fastdelegate::FastDelegate1<const CCommand &, void>);

 #else

 extern bool __SourceHook_FHRemoveConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);

 #if SH_IMPL_VERSION >= 5

 extern int __SourceHook_FHAddConCommandDispatch(void *, ISourceHook::AddHookMode, bool, class fastdelegate::FastDelegate0<void>);

 #elif SH_IMPL_VERSION == 4

 extern int __SourceHook_FHAddConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);

 #elif SH_IMPL_VERSION == 3

 extern bool __SourceHook_FHAddConCommandDispatch(void *, bool, class fastdelegate::FastDelegate0<void>);

 #endif //SH_IMPL_VERSION

 #endif //ORANGEBOX_BUILD

 ChatTriggers g_ChatTriggers;

 bool g_bSupressSilentFails = false;

 CPhraseFile *g_pFloodPhrases = NULL;

 ChatTriggers::ChatTriggers() : m_pSayCmd(NULL), m_bWillProcessInPost(false), 

 	m_bTriggerWasSilent(false), m_ReplyTo(SM_REPLY_CONSOLE)

 {

 	m_PubTrigger = sm_strdup("!");

 	m_PrivTrigger = sm_strdup("/");

 	m_PubTriggerSize = 1;

 	m_PrivTriggerSize = 1;

 	m_bIsChatTrigger = false;

 }

 ChatTriggers::~ChatTriggers()

 {

 	delete [] m_PubTrigger;

 	m_PubTrigger = NULL;

 	delete [] m_PrivTrigger;

 	m_PrivTrigger = NULL;

 }

 ConfigResult ChatTriggers::OnSourceModConfigChanged(const char *key, 

 													const char *value, 

 													ConfigSource source,

 													char *error, 

 													size_t maxlength)

 {

 	if (strcmp(key, "PublicChatTrigger") == 0)

 	{

 		delete [] m_PubTrigger;

 		m_PubTrigger = sm_strdup(value);

 		m_PubTriggerSize = strlen(m_PubTrigger);

 		return ConfigResult_Accept;

 	}

 	else if (strcmp(key, "SilentChatTrigger") == 0)

 	{

 		delete [] m_PrivTrigger;

 		m_PrivTrigger = sm_strdup(value);

 		m_PrivTriggerSize = strlen(m_PrivTrigger);

 		return ConfigResult_Accept;

 	}

 	else if (strcmp(key, "SilentFailSuppress") == 0)

 	{

 		g_bSupressSilentFails = strcmp(value, "yes") == 0;

 		return ConfigResult_Accept;

 	}

 	return ConfigResult_Ignore;

 }

 void ChatTriggers::OnSourceModAllInitialized()

 {

 	m_pShouldFloodBlock = g_Forwards.CreateForward("OnClientFloodCheck", ET_Event, 1, NULL, Param_Cell);

 	m_pDidFloodBlock = g_Forwards.CreateForward("OnClientFloodResult", ET_Event, 2, NULL, Param_Cell, Param_Cell);

 }

 void ChatTriggers::OnSourceModAllInitialized_Post()

 {

 	unsigned int file_id;

 	file_id = g_Translator.FindOrAddPhraseFile("antiflood.phrases.txt");

 	g_pFloodPhrases = g_Translator.GetFileByIndex(file_id);

 }

 void ChatTriggers::OnSourceModGameInitialized()

 {

 	unsigned int total = 2;

 	ConCommandBase *pCmd = icvar->GetCommands();

 	const char *name;

 	while (pCmd)

 	{

 		if (pCmd->IsCommand())

 		{

 			name = pCmd->GetName();

 			if (!m_pSayCmd && strcmp(name, "say") == 0)

 			{

 				m_pSayCmd = (ConCommand *)pCmd;

 				if (--total == 0)

 				{

 					break;

 				}

 			} else if (!m_pSayTeamCmd && strcmp(name, "say_team") == 0) {

 				m_pSayTeamCmd = (ConCommand *)pCmd;

 				if (--total == 0)

 				{

 					break;

 				}

 			}

 		}

 		pCmd = const_cast<ConCommandBase *>(pCmd->GetNext());

 	}

 	if (m_pSayCmd)

 	{

 		SH_ADD_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayCmd, this, &ChatTriggers::OnSayCommand_Pre, false);

 		SH_ADD_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayCmd, this, &ChatTriggers::OnSayCommand_Post, true);

 	}

 	if (m_pSayTeamCmd)

 	{

 		SH_ADD_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayTeamCmd, this, &ChatTriggers::OnSayCommand_Pre, false);

 		SH_ADD_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayTeamCmd, this, &ChatTriggers::OnSayCommand_Post, true);

 	}

 }

 void ChatTriggers::OnSourceModShutdown()

 {

 	if (m_pSayTeamCmd)

 	{

 		SH_REMOVE_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayTeamCmd, this, &ChatTriggers::OnSayCommand_Post, true);

 		SH_REMOVE_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayTeamCmd, this, &ChatTriggers::OnSayCommand_Pre, false);

 	}

 	if (m_pSayCmd)

 	{

 		SH_REMOVE_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayCmd, this, &ChatTriggers::OnSayCommand_Post, true);

 		SH_REMOVE_HOOK_MEMFUNC(ConCommand, Dispatch, m_pSayCmd, this, &ChatTriggers::OnSayCommand_Pre, false);

 	}

 	g_Forwards.ReleaseForward(m_pShouldFloodBlock);

 	g_Forwards.ReleaseForward(m_pDidFloodBlock);

 }

 #if defined ORANGEBOX_BUILD

 void ChatTriggers::OnSayCommand_Pre(const CCommand &command)

 {

 #else

 void ChatTriggers::OnSayCommand_Pre()

 {

 	CCommand command;

 #endif

 	int client;

 	CPlayer *pPlayer;

 	client = g_ConCmds.GetCommandClient();

 	m_bIsChatTrigger = false;

 	m_bWasFloodedMessage = false;

 	/* The server console cannot do this */

 	if (client == 0 || (pPlayer = g_Players.GetPlayerByIndex(client)) == NULL)

 	{

 		RETURN_META(MRES_IGNORED);

 	}

 	/* We guarantee the client is connected */

 	if (!pPlayer->IsConnected())

 	{

 		RETURN_META(MRES_IGNORED);

 	}

 	const char *args = command.ArgS();

 	if (!args)

 	{

 		RETURN_META(MRES_IGNORED);

 	}

 	/* Check if we need to block this message from being sent */

 	if (ClientIsFlooding(client))

 	{

 		char buffer[128];

 		/* :TODO: log an error? */

 		if (g_Translator.CoreTransEx(g_pFloodPhrases, 

 			client, 

 			buffer, 

 			sizeof(buffer),

 			"Flooding the server",

 			NULL,

 			NULL)

 			!= Trans_Okay)

 		{

 			UTIL_Format(buffer, sizeof(buffer), "You are flooding the server!");

 		}

 		/* :TODO: we should probably kick people who spam too much. */

 		char fullbuffer[192];

 		UTIL_Format(fullbuffer, sizeof(fullbuffer), "[SM] %s", buffer);

 		g_HL2.TextMsg(client, HUD_PRINTTALK, fullbuffer);

 		m_bWasFloodedMessage = true;

 		RETURN_META(MRES_SUPERCEDE);

 	}

 	/* Handle quoted string sets */

 	bool is_quoted = false;

 	if (args[0] == '"')

 	{

 		args++;

 		is_quoted = true;

 	}

 	bool is_trigger = false;

 	bool is_silent = false;

 	/* Check for either trigger */

 	if (m_PubTriggerSize && strncmp(args, m_PubTrigger, m_PubTriggerSize) == 0)

 	{

 		is_trigger = true;

 		args = &args[m_PubTriggerSize];

 	} 

 	else if (m_PrivTriggerSize && strncmp(args, m_PrivTrigger, m_PrivTriggerSize) == 0) 

 	{

 		is_trigger = true;

 		is_silent = true;

 		args = &args[m_PrivTriggerSize];

 	}

 	if (!is_trigger)

 	{

 		RETURN_META(MRES_IGNORED);

 	}

 	/**

 	 * Test if this is actually a command!

 	 */

 	if (!PreProcessTrigger(engine->PEntityOfEntIndex(client), args, is_quoted))

 	{

 		CPlayer *pPlayer;

 		if (is_silent 

 			&& g_bSupressSilentFails 

 			&& client != 0

 			&& (pPlayer = g_Players.GetPlayerByIndex(client)) != NULL

 			&& pPlayer->GetAdminId() != INVALID_ADMIN_ID)

 		{

 			RETURN_META(MRES_SUPERCEDE);

 		}

 		RETURN_META(MRES_IGNORED);

 	}

 	m_bIsChatTrigger = true;

 	/**

 	 * We'll execute it in post.

 	 */

 	m_bWillProcessInPost = true;

 	m_bTriggerWasSilent = is_silent;

 	/* If we're silent, block */

 	if (is_silent)

 	{

 		RETURN_META(MRES_SUPERCEDE);

 	}

 	/* Otherwise, let the command continue */

 	RETURN_META(MRES_IGNORED);

 }

 #if defined ORANGEBOX_BUILD

 void ChatTriggers::OnSayCommand_Post(const CCommand &command)

 #else

 void ChatTriggers::OnSayCommand_Post()

 #endif

 {

 	m_bIsChatTrigger = false;

 	m_bWasFloodedMessage = false;

 	if (m_bWillProcessInPost)

 	{

 		/* Reset this for re-entrancy */

 		m_bWillProcessInPost = false;

 		/* Execute the cached command */

 		int client = g_ConCmds.GetCommandClient();

 		unsigned int old = SetReplyTo(SM_REPLY_CHAT);

 		serverpluginhelpers->ClientCommand(engine->PEntityOfEntIndex(client), m_ToExecute);

 		SetReplyTo(old);

 	}

 }

 bool ChatTriggers::PreProcessTrigger(edict_t *pEdict, const char *args, bool is_quoted)

 {

 	/* Extract a command.  This is kind of sloppy. */

 	char cmd_buf[64];

 	size_t cmd_len = 0;

 	const char *inptr = args;

 	while (*inptr != '\0' 

 			&& !textparsers->IsWhitespace(inptr) 

 			&& *inptr != '"'

 			&& cmd_len < sizeof(cmd_buf) - 1)

 	{

 		cmd_buf[cmd_len++] = *inptr++;

 	}

 	cmd_buf[cmd_len] = '\0';

 	if (cmd_len == 0)

 	{

 		return false;

 	}

 	/* See if we have this registered */

 	bool prepended = false;

 	if (!g_ConCmds.LookForSourceModCommand(cmd_buf))

 	{

 		/* Check if we had an "sm_" prefix */

 		if (strncmp(cmd_buf, "sm_", 3) == 0)

 		{

 			return false;

 		}

 		/* Now, prepend.  Don't worry about the buffers.  This will 

 		 * work because the sizes are limited from earlier.

 		 */

 		char new_buf[80];

 		strcpy(new_buf, "sm_");

 		strncopy(&new_buf[3], cmd_buf, sizeof(new_buf)-3);

 		/* Recheck */

 		if (!g_ConCmds.LookForSourceModCommand(new_buf))

 		{

 			return false;

 		}

 		prepended = true;

 	}

 	/* See if we need to do extra string manipulation */

 	if (is_quoted || prepended)

 	{

 		size_t len;

 		/* Check if we need to prepend sm_ */

 		if (prepended)

 		{

 			len = UTIL_Format(m_ToExecute, sizeof(m_ToExecute), "sm_%s", args);

 		} else {

 			len = strncopy(m_ToExecute, args, sizeof(m_ToExecute));

 		}

 		/* Check if we need to strip a quote */

 		if (is_quoted)

 		{

 			if (m_ToExecute[len-1] == '"')

 			{

 				m_ToExecute[--len] = '\0';

 			}

 		}

 	} else {

 		strncopy(m_ToExecute, args, sizeof(m_ToExecute));

 	}

 	return true;

 }

 unsigned int ChatTriggers::SetReplyTo(unsigned int reply)

 {

 	unsigned int old = m_ReplyTo;

 	m_ReplyTo = reply;

 	return old;

 }

 unsigned int ChatTriggers::GetReplyTo()

 {

 	return m_ReplyTo;

 }

 bool ChatTriggers::IsChatTrigger()

 {

 	return m_bIsChatTrigger;

 }

 bool ChatTriggers::ClientIsFlooding(int client)

 {

 	bool is_flooding = false;

 	if (m_pShouldFloodBlock->GetFunctionCount() != 0)

 	{

 		cell_t res = 0;

 		m_pShouldFloodBlock->PushCell(client);

 		m_pShouldFloodBlock->Execute(&res);

 		if (res != 0)

 		{

 			is_flooding = true;

 		}

 	}

 	if (m_pDidFloodBlock->GetFunctionCount() != 0)

 	{

 		m_pDidFloodBlock->PushCell(client);

 		m_pDidFloodBlock->PushCell(is_flooding ? 1 : 0);

 		m_pDidFloodBlock->Execute(NULL);

 	}

 	return is_flooding;

 }

 bool ChatTriggers::WasFloodedMessage()

 {

 	return m_bWasFloodedMessage;

 }