/**

  * 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: $Id$

  */

 #ifndef _INCLUDE_SOURCEMOD_CONVARMANAGER_H_

 #define _INCLUDE_SOURCEMOD_CONVARMANAGER_H_

 #include "sm_globals.h"

 #include "sourcemm_api.h"

 #include "sm_trie.h"

 #include <sh_list.h>

 #include <IPluginSys.h>

 #include <IForwardSys.h>

 #include <IHandleSys.h>

 #include <IRootConsoleMenu.h>

 using namespace SourceHook;

 /**

  * Holds SourceMod-specific information about a convar

  */

 struct ConVarInfo

 {

 	Handle_t handle;					/**< Handle to convar */

 	bool sourceMod;						/**< Determines whether or not convar was created by a SourceMod plugin */

 	IChangeableForward *pChangeForward;	/**< Forward associated with convar */

 	FnChangeCallback origCallback;		/**< The original callback function */

 #if PLAPI_VERSION < 12

 	const char *name;					/**< Name of convar */

 #endif

 };

 /**

  * Holds information about a client convar query

  */

 struct ConVarQuery

 {

 	QueryCvarCookie_t cookie;			/**< Cookie that identifies query */

 	IPluginFunction *pCallback;			/**< Function that will be called when query is finished */

 	cell_t value;						/**< Optional value passed to query function */

 };

 class ConVarManager :

 	public SMGlobalClass,

 	public IHandleTypeDispatch,

 	public IPluginsListener,

 	public IRootConsoleCommand

 {

 public:

 	ConVarManager();

 	~ConVarManager();

 public: // SMGlobalClass

 	void OnSourceModAllInitialized();

 	void OnSourceModShutdown();

 	void OnSourceModVSPReceived(IServerPluginCallbacks *iface);

 public: // IHandleTypeDispatch

 	void OnHandleDestroy(HandleType_t type, void *object);

 public: // IPluginsListener

 	void OnPluginUnloaded(IPlugin *plugin);

 public: //IRootConsoleCommand

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

 public:

 	/**

 	 * Get the 'ConVar' handle type ID.

 	 */

 	inline HandleType_t GetHandleType()

 	{

 		return m_ConVarType;

 	}

 	/**

 	 * Get the convar lookup trie.

 	 */

 	inline Trie *GetConVarCache()

 	{

 		return m_ConVarCache;

 	}

 public:

 	/**

 	 * Create a convar and return a handle to it.

 	 */

 	Handle_t CreateConVar(IPluginContext *pContext, const char *name, const char *defaultVal,

 	                      const char *description, int flags, bool hasMin, float min, bool hasMax, float max);

 	/**

 	 * Searches for a convar and returns a handle to it

 	 */

 	Handle_t FindConVar(const char* name);

 	/**

 	 * Add a function to call when the specified convar changes.

 	 */

 	void HookConVarChange(ConVar *pConVar, IPluginFunction *pFunction);

 	/**

 	 * Remove a function from the forward that will be called when the specified convar changes.

 	 */

 	void UnhookConVarChange(ConVar *pConVar, IPluginFunction *pFunction);

 	/**

 	 * Starts a query to find the value of a client convar.

 	 */

 	QueryCvarCookie_t QueryClientConVar(edict_t *pPlayer, const char *name, IPluginFunction *pCallback,

 	                                    Handle_t hndl);

 #if PLAPI_VERSION >= 12

 	/**

 	 * Called when Metamod:Source is about to remove convar

 	 */

 	void OnUnlinkConCommandBase(PluginId id, ConCommandBase *pCommand);

 #else

 	/**

 	 * Called when Metamod:Source has unloaded a plugin

 	 */

 	void OnMetamodPluginUnloaded(PluginId id);

 #endif

 private:

 	/**

 	 * Adds a convar to a plugin's list.

 	 */

 	static void AddConVarToPluginList(IPluginContext *pContext, const ConVar *pConVar);

 	/**

 	 * Static callback that Valve's ConVar object executes when the convar's value changes.

 	 */

 	static void OnConVarChanged(ConVar *pConVar, const char *oldValue);

 	/**

 	 * Callback for when StartQueryCvarValue() has finished.

 	 */

 	void OnQueryCvarValueFinished(QueryCvarCookie_t cookie, edict_t *pPlayer, EQueryCvarValueStatus result,

 	                              const char *cvarName, const char *cvarValue);

 private:

 	HandleType_t m_ConVarType;

 	List<ConVarInfo *> m_ConVars;

 	List<ConVarQuery> m_ConVarQueries;

 	Trie *m_ConVarCache;

 	IServerPluginCallbacks *m_VSPIface;

 	bool m_CanQueryConVars;

 #if PLAPI_VERSION < 12

 	bool m_IgnoreHandle;

 #endif

 };

 extern ConVarManager g_ConVarManager;

 #endif // _INCLUDE_SOURCEMOD_CONVARMANAGER_H_