/**

 * vim: set ts=4 :

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

 * SourceMod (C)2004-2008 AlliedModders LLC.  All rights reserved.

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

 *

 * This file is part of the SourceMod/SourcePawn SDK.

 *

 * 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: $Id$

 */

#if defined _eventsmsgs_included

 #endinput

#endif

#define _eventsmsgs_included

/**

 * UserMsg helper values.

 */

enum UserMsg

{

	INVALID_MESSAGE_ID = -1,

};

/**

 * UserMsg message serialization formats

 */

enum UserMessageType

{

	UM_BitBuf = 0,

	UM_Protobuf,

};

/**

 * @section Message Flags.

 */

#define USERMSG_RELIABLE		(1<<2)		/**< Message will be set on the reliable stream */

#define USERMSG_INITMSG			(1<<3)		/**< Message will be considered to be an initmsg */

#define USERMSG_BLOCKHOOKS		(1<<7)		/**< Prevents the message from triggering SourceMod and Metamod hooks */

/**

 * @endsection

 */

/**

 * Returns usermessage serialization type used for the current engine

 *

 * @return				The supported usermessage type.

 */

native UserMessageType:GetUserMessageType();

/**

 * Returns the ID of a given message, or -1 on failure.

 *

 * @param msg			String containing message name (case sensitive).

 * @return				A message index, or INVALID_MESSAGE_ID on failure.

 */

native UserMsg:GetUserMessageId(const String:msg[]);

/**

 * Retrieves the name of a message by ID.

 *

 * @param msg_id		Message index.

 * @param msg			Buffer to store the name of the message.

 * @param maxlength		Maximum length of string buffer.

 * @return				True if message index is valid, false otherwise.

 */

native bool:GetUserMessageName(UserMsg:msg_id, String:msg[], maxlength);

/**

 * Starts a usermessage (network message).

 * @note Only one message can be active at a time.

 * @note It is illegal to send any message while a non-intercept hook is in progress.

 *

 * @param msgname		Message name to start.

 * @param clients		Array containing player indexes to broadcast to.

 * @param numClients	Number of players in the array.

 * @param flags			Optional flags to set.

 * @return				A handle to a bf_write bit packing structure, or

 *						INVALID_HANDLE on failure.

 * @error				Invalid message name, unable to start a message, invalid client,

 *						or client not connected.

 */

native Handle:StartMessage(String:msgname[], clients[], numClients, flags=0);

/**

 * Starts a usermessage (network message).

 * @note Only one message can be active at a time.

 * @note It is illegal to send any message while a non-intercept hook is in progress.

 *

 * @param msg			Message index to start.

 * @param clients		Array containing player indexes to broadcast to.

 * @param numClients	Number of players in the array.

 * @param flags			Optional flags to set.

 * @return				A handle to a bf_write bit packing structure, or

 *						INVALID_HANDLE on failure.

 * @error				Invalid message name, unable to start a message, invalid client,

 *						or client not connected.

 */

native Handle:StartMessageEx(UserMsg:msg, clients[], numClients, flags=0);

/**

 * Ends a previously started user message (network message).

 *

 * @noreturn

 */

native EndMessage();

/**

 * Called when a message is hooked

 *

 * @param msg_id		Message index.

 * @param msg			Handle to the input bit buffer or protobuf.

 * @param players		Array containing player indexes.

 * @param playersNum	Number of players in the array.

 * @param reliable		True if message is reliable, false otherwise.

 * @param init			True if message is an initmsg, false otherwise.

 * @return				Ignored for normal hooks.  For intercept hooks, Plugin_Handled 

 *						blocks the message from being sent, and Plugin_Continue 

 *						resumes normal functionality.

 */

functag public Action:MsgHook(UserMsg:msg_id, Handle:msg, const players[], playersNum, bool:reliable, bool:init);

/**

 * Called when a message hook has completed.

 *

 * @param msg_id		Message index.

 * @param sent			True if message was sent, false if blocked.

 */

functag public MsgPostHook(UserMsg:msg_id, bool:sent);

/**

 * Hooks a user message.

 *

 * @param msg_id		Message index.

 * @param hook			Function to use as a hook.

 * @param intercept		If intercept is true, message will be fully intercepted,

 * 						allowing the user to block the message.  Otherwise,

 *						the hook is normal and ignores the return value.

 * @param notify		Notification function.

 * @noreturn

 * @error				Invalid message index.

 */

native HookUserMessage(UserMsg:msg_id, MsgHook:hook, bool:intercept=false, MsgPostHook:post=MsgPostHook:-1);

/**

 * Removes one usermessage hook.

 *

 * @param msg_id		Message index.

 * @param hook			Function used for the hook.

 * @param intercept		Specifies whether the hook was an intercept hook or not.

 * @noreturn

 * @error				Invalid message index.

 */

native UnhookUserMessage(UserMsg:msg_id, MsgHook:hook, bool:intercept=false);

/**

 * Starts a usermessage (network message) that broadcasts to all clients.

 * @note See StartMessage or StartMessageEx().

 *

 * @param msgname		Message name to start.

 * @param flags			Optional flags to set.

 * @return				A handle to a bf_write bit packing structure, or

 *						INVALID_HANDLE on failure.

 */

stock Handle:StartMessageAll(String:msgname[], flags=0)

{

	new total = 0;

	new clients[MaxClients];

	for (new i=1; i<=MaxClients; i++)

	{

		if (IsClientConnected(i))

		{

			clients[total++] = i;

		}

	}

	return StartMessage(msgname, clients, total, flags);

}

/**

 * Starts a simpler usermessage (network message) for one client.

 * @note See StartMessage or StartMessageEx().

 *

 * @param msgname		Message name to start.

 * @param client		Client to send to.

 * @param flags			Optional flags to set.

 * @return				A handle to a bf_write bit packing structure, or

 *						INVALID_HANDLE on failure.

 */

stock Handle:StartMessageOne(String:msgname[], client, flags=0)

{

	new players[1];

	players[0] = client;

	return StartMessage(msgname, players, 1, flags);

}