/**

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

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

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

 *

 * This file is not open source and may not be copied without explicit

 * written permission of AlliedModders LLC.  This file may not be redistributed 

 * in whole or significant part.

 * For information, see LICENSE.txt or http://www.sourcemod.net/license.php

 *

 * Version: $Id$

 */

 #include "CConCmdManager.h"

 #include "sm_srvcmds.h"

 #include "AdminCache.h"

 #include "sm_stringutil.h"

 #include "CPlayerManager.h"

 #include "CTranslator.h"

 CConCmdManager g_ConCmds;

 SH_DECL_HOOK0_void(ConCommand, Dispatch, SH_NOATTRIB, false);

 SH_DECL_HOOK1_void(IServerGameClients, SetCommandClient, SH_NOATTRIB, false, int);

 struct PlCmdInfo

 {

 	ConCmdInfo *pInfo;

 	CmdHook *pHook;

 	CmdType type;

 };

 typedef List<PlCmdInfo> CmdList;

 void AddToPlCmdList(CmdList *pList, const PlCmdInfo &info);

 CConCmdManager::CConCmdManager() : m_Strings(1024)

 {

 	m_pCmds = sm_trie_create();

 	m_pCmdGrps = sm_trie_create();

 }

 CConCmdManager::~CConCmdManager()

 {

 	sm_trie_destroy(m_pCmds);

 	sm_trie_destroy(m_pCmdGrps);

 }

 void CConCmdManager::OnSourceModAllInitialized()

 {

 	g_PluginSys.AddPluginsListener(this);

 	g_RootMenu.AddRootConsoleCommand("cmds", "List console commands", this);

 	SH_ADD_HOOK_MEMFUNC(IServerGameClients, SetCommandClient, serverClients, this, &CConCmdManager::SetCommandClient, false);

 }

 void CConCmdManager::OnSourceModShutdown()

 {

 	/* All commands should already be removed by the time we're done */

 	SH_REMOVE_HOOK_MEMFUNC(IServerGameClients, SetCommandClient, serverClients, this, &CConCmdManager::SetCommandClient, false);

 	g_RootMenu.RemoveRootConsoleCommand("cmds", this);

 	g_PluginSys.RemovePluginsListener(this);

 }

 void CConCmdManager::RemoveConCmds(List<CmdHook *> &cmdlist, IPluginContext *pContext)

 {

 	List<CmdHook *>::iterator iter = cmdlist.begin();

 	CmdHook *pHook;

 	while (iter != cmdlist.end())

 	{

 		pHook = (*iter);

 		if (pHook->pf->GetParentContext() == pContext)

 		{

 			delete pHook->pAdmin;

 			delete pHook;

 			iter = cmdlist.erase(iter);

 		} else {

 			iter++;

 		}

 	}

 }

 void CConCmdManager::OnPluginDestroyed(IPlugin *plugin)

 {

 	CmdList *pList;

 	List<ConCmdInfo *> removed;

 	if (plugin->GetProperty("CommandList", (void **)&pList, true))

 	{

 		IPluginContext *pContext = plugin->GetBaseContext();

 		CmdList::iterator iter;

 		/* First pass!

 	 	 * Only bother if there's an actual command list on this plugin... 

 	 	 */

 		for (iter=pList->begin();

 			iter!=pList->end();

 			iter++)

 		{

 			PlCmdInfo &cmd = (*iter);

 			ConCmdInfo *pInfo = cmd.pInfo;

 			/* Has this chain already been fully cleaned/removed? */

 			if (removed.find(pInfo) != removed.end())

 			{

 				continue;

 			}

 			/* Remove any hooks from us on this command */

 			RemoveConCmds(pInfo->conhooks, pContext);

 			RemoveConCmds(pInfo->srvhooks, pContext);

 			/* See if there are still hooks */

 			if (pInfo->srvhooks.size())

 			{

 				continue;

 			}

 			if (pInfo->conhooks.size())

 			{

 				continue;

 			}

 			/* Remove the command, it should be safe now */

 			RemoveConCmd(pInfo);

 			removed.push_back(pInfo);

 		}

 		delete pList;

 	}

 }

 void CommandCallback()

 {

 	g_ConCmds.InternalDispatch();

 }

 void CConCmdManager::SetCommandClient(int client)

 {

 	m_CmdClient = client + 1;

 }

 ResultType CConCmdManager::DispatchClientCommand(int client, ResultType type)

 {

 	const char *cmd = engine->Cmd_Argv(0);

 	int args = engine->Cmd_Argc() - 1;

 	ConCmdInfo *pInfo;

 	if (sm_trie_retrieve(m_pCmds, cmd, (void **)&pInfo))

 	{

 		cell_t result = type;

 		cell_t tempres = result;

 		List<CmdHook *>::iterator iter;

 		CmdHook *pHook;

 		for (iter=pInfo->conhooks.begin();

 			 iter!=pInfo->conhooks.end();

 			 iter++)

 		{

 			pHook = (*iter);

 			if (!pHook->pf->IsRunnable())

 			{

 				continue;

 			}

 			if (pHook->pAdmin && !CheckAccess(client, cmd, pHook->pAdmin))

 			{

 				if (result < Pl_Handled)

 				{

 					result = Pl_Handled;

 				}

 				continue;

 			}

 			pHook->pf->PushCell(client);

 			pHook->pf->PushCell(args);

 			if (pHook->pf->Execute(&tempres) == SP_ERROR_NONE)

 			{

 				if (tempres > result)

 				{

 					result = tempres;

 				}

 				if (result == Pl_Stop)

 				{

 					break;

 				}

 			}

 		}

 		type = (ResultType)result;

 	}

 	return type;

 }

 void CConCmdManager::InternalDispatch()

 {

 	/**

 	 * Note: Console commands will EITHER go through IServerGameDLL::ClientCommand,

 	 * OR this dispatch.  They will NEVER go through both.

 	 * -- 

 	 * Whether or not it goes through the callback is determined by FCVAR_GAMEDLL

 	 */

 	const char *cmd = engine->Cmd_Argv(0);

 	ConCmdInfo *pInfo;

 	if (!sm_trie_retrieve(m_pCmds, cmd, (void **)&pInfo))

 	{

 		return;

 	}

 	cell_t result = Pl_Continue;

 	int args = engine->Cmd_Argc() - 1;

 	List<CmdHook *>::iterator iter;

 	CmdHook *pHook;

 	/* Execute server-only commands if viable */

 	if (m_CmdClient == 0 && pInfo->srvhooks.size())

 	{

 		cell_t tempres = result;

 		for (iter=pInfo->srvhooks.begin();

 			 iter!=pInfo->srvhooks.end();

 			 iter++)

 		{

 			pHook = (*iter);

 			if (!pHook->pf->IsRunnable())

 			{

 				continue;

 			}

 			pHook->pf->PushCell(args);

 			if (pHook->pf->Execute(&tempres) == SP_ERROR_NONE)

 			{

 				if (tempres > result)

 				{

 					result = tempres;

 				}

 				if (result == Pl_Stop)

 				{

 					break;

 				}

 			}

 		}

 		/* Check if there's an early stop */

 		if (result >= Pl_Stop)

 		{

 			if (!pInfo->sourceMod)

 			{

 				RETURN_META(MRES_SUPERCEDE);

 			}

 			return;

 		}

 	}

 	/* Execute console commands */

 	if (pInfo->conhooks.size())

 	{

 		cell_t tempres = result;

 		for (iter=pInfo->conhooks.begin();

 			iter!=pInfo->conhooks.end();

 			iter++)

 		{

 			pHook = (*iter);

 			if (!pHook->pf->IsRunnable())

 			{

 				continue;

 			}

 			if (m_CmdClient 

 				&& pHook->pAdmin

 				&& !CheckAccess(m_CmdClient, cmd, pHook->pAdmin))

 			{

 				if (result < Pl_Handled)

 				{

 					result = Pl_Handled;

 				}

 				continue;

 			}

 			pHook->pf->PushCell(m_CmdClient);

 			pHook->pf->PushCell(args);

 			if (pHook->pf->Execute(&tempres) != SP_ERROR_NONE)

 			{

 				if (tempres > result)

 				{

 					result = tempres;

 				}

 				if (result == Pl_Stop)

 				{

 					break;

 				}

 			}

 		}

 	}

 	if (result >= Pl_Handled)

 	{

 		if (!pInfo->sourceMod)

 		{

 			RETURN_META(MRES_SUPERCEDE);

 		}

 		return;

 	}

 }

 bool CConCmdManager::CheckAccess(int client, const char *cmd, AdminCmdInfo *pAdmin)

 {

 	FlagBits cmdflags = pAdmin->eflags;

 	if (cmdflags == 0)

 	{

 		return true;

 	}

 	CPlayer *player = g_Players.GetPlayerByIndex(client);

 	if (!player)

 	{

 		return false;

 	}

 	AdminId adm = player->GetAdminId();

 	if (adm != INVALID_ADMIN_ID)

 	{

 		FlagBits bits = g_Admins.GetAdminFlags(adm, Access_Effective);

 		/* root knows all, WHOA */

 		if ((bits & ADMFLAG_ROOT) == ADMFLAG_ROOT)

 		{

 			return true;

 		}

 		/* See if our other flags match */

 		if ((bits & cmdflags) == cmdflags)

 		{

 			return true;

 		}

 		/* Check for overrides */

 		unsigned int groups = g_Admins.GetAdminGroupCount(adm);

 		GroupId gid;

 		OverrideRule rule;

 		bool override = false;

 		for (unsigned int i=0; i<groups; i++)

 		{

 			gid = g_Admins.GetAdminGroup(adm, i, NULL);

 			/* First get group-level override */

 			override = g_Admins.GetGroupCommandOverride(gid, cmd, Override_CommandGroup, &rule);

 			/* Now get the specific command override */

 			if (g_Admins.GetGroupCommandOverride(gid, cmd, Override_Command, &rule))

 			{

 				override = true;

 			}

 			if (override)

 			{

 				if (rule == Command_Allow)

 				{

 					return true;

 				} else if (rule == Command_Deny) {

 					break;

 				}

 			}

 		}

 	}

 	if (player->IsFakeClient()

 		|| player->GetEdict() == NULL)

 	{

 		return false;

 	}

 	/* If we got here, the command failed... */

 	char buffer[128];

 	if (g_Translator.CoreTrans(client, buffer, sizeof(buffer), "No Access", NULL, NULL)

 		!= Trans_Okay)

 	{

 		snprintf(buffer, sizeof(buffer), "You do not have access to this command");

 	}

 	char fullbuffer[192];

 	snprintf(fullbuffer, sizeof(fullbuffer), "[SM] %s.\n", buffer);

 	engine->ClientPrintf(player->GetEdict(), fullbuffer);

 	return false;

 }

 void CConCmdManager::AddConsoleCommand(IPluginFunction *pFunction, 

 									   const char *name, 

 									   const char *description, 

 									   int flags)

 {

 	ConCmdInfo *pInfo = AddOrFindCommand(name, description, flags);

 	CmdHook *pHook = new CmdHook();

 	pHook->pf = pFunction;

 	if (description && description[0])

 	{

 		pHook->helptext.assign(description);

 	}

 	pInfo->conhooks.push_back(pHook);

 	/* Add to the plugin */

 	CmdList *pList;

 	IPlugin *pPlugin = g_PluginSys.GetPluginByCtx(pFunction->GetParentContext()->GetContext());

 	if (!pPlugin->GetProperty("CommandList", (void **)&pList))

 	{

 		pList = new CmdList();

 		pPlugin->SetProperty("CommandList", pList);

 	}

 	PlCmdInfo info;

 	info.pInfo = pInfo;

 	info.type = Cmd_Console;

 	info.pHook = pHook;

 	AddToPlCmdList(pList, info);

 }

 bool CConCmdManager::AddAdminCommand(IPluginFunction *pFunction, 

 									 const char *name, 

 									 const char *group,

 									 int adminflags,

 									 const char *description, 

 									 int flags)

 {

 	ConCmdInfo *pInfo = AddOrFindCommand(name, description, flags);

 	CmdHook *pHook = new CmdHook();

 	AdminCmdInfo *pAdmin = new AdminCmdInfo();

 	pHook->pf = pFunction;

 	if (description && description[0])

 	{

 		pHook->helptext.assign(description);

 	}

 	pHook->pAdmin = pAdmin;

 	void *object;

 	int grpid;

 	if (!sm_trie_retrieve(m_pCmdGrps, group, (void **)&object))

 	{

 		grpid = m_Strings.AddString(group);

 		sm_trie_insert(m_pCmdGrps, group, (void *)grpid);

 	} else {

 		grpid = (int)object;

 	}

 	pAdmin->cmdGrpId = grpid;

 	pAdmin->flags = adminflags;

 	/* First get the command group override, if any */

 	bool override = g_Admins.GetCommandOverride(group, 

 		Override_CommandGroup,

 		&(pAdmin->eflags));

 	/* Next get the command override, if any */

 	if (g_Admins.GetCommandOverride(name,

 		Override_Command,

 		&(pAdmin->eflags)))

 	{

 		override = true;

 	}

 	/* Assign normal flags if there were no overrides */

 	if (!override)

 	{

 		pAdmin->eflags = pAdmin->flags;

 	}

 	/* Finally, add the hook */

 	pInfo->conhooks.push_back(pHook);

 	/* Now add to the plugin */

 	CmdList *pList;

 	IPlugin *pPlugin = g_PluginSys.GetPluginByCtx(pFunction->GetParentContext()->GetContext());

 	if (!pPlugin->GetProperty("CommandList", (void **)&pList))

 	{

 		pList = new CmdList();

 		pPlugin->SetProperty("CommandList", pList);

 	}

 	PlCmdInfo info;

 	info.pInfo = pInfo;

 	info.type = Cmd_Admin;

 	info.pHook = pHook;

 	AddToPlCmdList(pList, info);

 	return true;

 }

 void CConCmdManager::AddServerCommand(IPluginFunction *pFunction, 

 									  const char *name, 

 									  const char *description, 

 									  int flags)

 {

 	ConCmdInfo *pInfo = AddOrFindCommand(name, description, flags);

 	CmdHook *pHook = new CmdHook();

 	pHook->pf = pFunction;

 	if (description && description[0])

 	{

 		pHook->helptext.assign(description);

 	}

 	pInfo->srvhooks.push_back(pHook);

 	/* Add to the plugin */

 	CmdList *pList;

 	IPlugin *pPlugin = g_PluginSys.GetPluginByCtx(pFunction->GetParentContext()->GetContext());

 	if (!pPlugin->GetProperty("CommandList", (void **)&pList))

 	{

 		pList = new CmdList();

 		pPlugin->SetProperty("CommandList", pList);

 	}

 	PlCmdInfo info;

 	info.pInfo = pInfo;

 	info.type = Cmd_Server;

 	info.pHook = pHook;

 	AddToPlCmdList(pList, info);

 }

 void AddToPlCmdList(CmdList *pList, const PlCmdInfo &info)

 {

 	CmdList::iterator iter = pList->begin();

 	bool inserted = false;

 	const char *orig = NULL;

 	orig = info.pInfo->pCmd->GetName();

 	/* Insert this into the help list, SORTED alphabetically. */

 	while (iter != pList->end())

 	{

 		PlCmdInfo &obj = (*iter);

 		const char *cmd = obj.pInfo->pCmd->GetName();

 		if (strcmp(orig, cmd) < 0)

 		{

 			pList->insert(iter, info);

 			inserted = true;

 			break;

 		}

 		iter++;

 	}

 	if (!inserted)

 	{

 		pList->push_back(info);

 	}

 }

 void CConCmdManager::AddToCmdList(ConCmdInfo *info)

 {

 	List<ConCmdInfo *>::iterator iter = m_CmdList.begin();

 	ConCmdInfo *pInfo;

 	bool inserted = false;

 	const char *orig = NULL;

 	orig = info->pCmd->GetName();

 	/* Insert this into the help list, SORTED alphabetically. */

 	while (iter != m_CmdList.end())

 	{

 		const char *cmd = NULL;

 		pInfo = (*iter);

 		cmd = pInfo->pCmd->GetName();

 		if (strcmp(orig, cmd) < 0)

 		{

 			m_CmdList.insert(iter, info);

 			inserted = true;

 			break;

 		}

 		iter++;

 	}

 	if (!inserted)

 	{

 		m_CmdList.push_back(info);

 	}

 }

 void CConCmdManager::UpdateAdminCmdFlags(const char *cmd, OverrideType type, FlagBits bits)

 {

 	ConCmdInfo *pInfo;

 	if (type == Override_Command)

 	{

 		if (!sm_trie_retrieve(m_pCmds, cmd, (void **)&pInfo))

 		{

 			return;

 		}

 		List<CmdHook *>::iterator iter;

 		CmdHook *pHook;

 		for (iter=pInfo->conhooks.begin(); iter!=pInfo->conhooks.end(); iter++)

 		{

 			pHook = (*iter);

 			if (pHook->pAdmin)

 			{

 				if (bits)

 				{

 					pHook->pAdmin->eflags = bits;

 				} else {

 					pHook->pAdmin->eflags = pHook->pAdmin->flags;

 				}

 			}

 		}

 	} else if (type == Override_CommandGroup) {

 		void *object;

 		if (!sm_trie_retrieve(m_pCmdGrps, cmd, &object))

 		{

 			return;

 		}

 		int grpid = (int)object;

 		/* This is bad :( loop through all commands */

 		List<ConCmdInfo *>::iterator iter;

 		CmdHook *pHook;

 		for (iter=m_CmdList.begin(); iter!=m_CmdList.end(); iter++)

 		{

 			pInfo = (*iter);

 			for (List<CmdHook *>::iterator citer=pInfo->conhooks.begin();

 				 citer!=pInfo->conhooks.end();

 				 citer++)

 			{

 				pHook = (*citer);

 				if (pHook->pAdmin && pHook->pAdmin->cmdGrpId == grpid)

 				{

 					if (bits)

 					{

 						pHook->pAdmin->eflags = bits;

 					} else {

 						pHook->pAdmin->eflags = pHook->pAdmin->flags;

 					}

 				}

 			}

 		}

 	}

 }

 void CConCmdManager::RemoveConCmd(ConCmdInfo *info)

 {

 	/* Remove console-specific information

 	 * This should always be true as of right now

 	 */

 	if (info->pCmd)

 	{

 		/* Remove from the trie */

 		sm_trie_delete(m_pCmds, info->pCmd->GetName());

 		if (info->sourceMod)

 		{

 			/* Unlink from SourceMM */

 			g_SMAPI->UnregisterConCmdBase(g_PLAPI, info->pCmd);

 			/* Delete the command's memory */

 			char *new_help = const_cast<char *>(info->pCmd->GetHelpText());

 			char *new_name = const_cast<char *>(info->pCmd->GetName());

 			delete [] new_help;

 			delete [] new_name;

 			delete info->pCmd;

 		} else {

 			/* Remove the external hook */

 			SH_REMOVE_HOOK_STATICFUNC(ConCommand, Dispatch, info->pCmd, CommandCallback, false);

 		}

 	}

 	/* Remove from list */

 	m_CmdList.remove(info);

 	delete info;

 }

 ConCmdInfo *CConCmdManager::AddOrFindCommand(const char *name, const char *description, int flags)

 {

 	ConCmdInfo *pInfo;

 	if (!sm_trie_retrieve(m_pCmds, name, (void **)&pInfo))

 	{

 		pInfo = new ConCmdInfo();

 		/* Find the commandopan */

 		ConCommandBase *pBase = icvar->GetCommands();

 		ConCommand *pCmd = NULL;

 		while (pBase)

 		{

 			if (pBase->IsCommand()

 				&& (strcmp(pBase->GetName(), name) == 0))

 			{

 				pCmd = (ConCommand *)pBase;

 				break;

 			}

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

 		}

 		if (!pCmd)

 		{

 			/* Note that we have to duplicate because the source might not be 

 			 * a static string, and these expect static memory.

 			 */

 			if (!description)

 			{

 				description = "";

 			}

 			char *new_name = sm_strdup(name);

 			char *new_help = sm_strdup(description);

 			pCmd = new ConCommand(new_name, CommandCallback, new_help, flags);

 			pInfo->sourceMod = true;

 		} else {

 			SH_ADD_HOOK_STATICFUNC(ConCommand, Dispatch, pCmd, CommandCallback, false);

 		}

 		pInfo->pCmd = pCmd;

 		sm_trie_insert(m_pCmds, name, pInfo);

 		AddToCmdList(pInfo);

 	}

 	return pInfo;

 }

 void CConCmdManager::OnRootConsoleCommand(const char *command, unsigned int argcount)

 {

 	if (argcount >= 3)

 	{

 		const char *text = engine->Cmd_Argv(2);

 		int id = atoi(text);

 		CPlugin *pPlugin = g_PluginSys.GetPluginByOrder(id);

 		if (!pPlugin)

 		{

 			g_RootMenu.ConsolePrint("[SM] Plugin index %d not found.", id);

 			return;

 		}

 		CmdList *pList;

 		if (!pPlugin->GetProperty("CommandList", (void **)&pList))

 		{

 			g_RootMenu.ConsolePrint("[SM] No commands found for %s", pPlugin->GetFilename());

 			return;

 		}

 		if (!pList->size())

 		{

 			g_RootMenu.ConsolePrint("[SM] No commands found for %s", pPlugin->GetFilename());

 			return;

 		}

 		CmdList::iterator iter;

 		const char *type = NULL;

 		const char *name;

 		const char *help;

 		g_RootMenu.ConsolePrint(" %-17.16s %-8.7s %s", "[Name]", "[Type]", "[Help]");

 		for (iter=pList->begin();

 			 iter!=pList->end();

 			 iter++)

 		{

 			PlCmdInfo &cmd = (*iter);

 			if (cmd.type == Cmd_Server)

 			{

 				type = "server";

 			} else if (cmd.type == Cmd_Console) {

 				type = "console";

 			} else if (cmd.type == Cmd_Admin) {

 				type = "admin";

 			}

 			name = cmd.pInfo->pCmd->GetName();

 			if (cmd.pHook->helptext.size())

 			{

 				help = cmd.pHook->helptext.c_str();

 			} else {

 				help = cmd.pInfo->pCmd->GetHelpText();

 			}

 			g_RootMenu.ConsolePrint(" %-17.16s %-12.11s %s", name, type, help);		

 		}

 		return;

 	}

 	g_RootMenu.ConsolePrint("[SM] Usage: sm cmds <plugin #>");

 }