227 lines
6.6 KiB
C++
227 lines
6.6 KiB
C++
/* Copyright (C) 2011 Wildfire Games.
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* This file is part of 0 A.D.
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*
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* 0 A.D. is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* 0 A.D. is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with 0 A.D. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef NETCLIENT_H
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#define NETCLIENT_H
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#include "network/fsm.h"
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#include "network/NetFileTransfer.h"
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#include "network/NetHost.h"
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#include "scriptinterface/ScriptVal.h"
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#include "ps/CStr.h"
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#include <deque>
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class CGame;
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class CNetClientSession;
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class CNetClientTurnManager;
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class CNetServer;
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class ScriptInterface;
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// NetClient session FSM states
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enum
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{
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NCS_UNCONNECTED,
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NCS_CONNECT,
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NCS_HANDSHAKE,
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NCS_AUTHENTICATE,
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NCS_INITIAL_GAMESETUP,
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NCS_PREGAME,
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NCS_LOADING,
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NCS_JOIN_SYNCING,
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NCS_INGAME
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};
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/**
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* Network client.
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* This code is run by every player (including the host, if they are not
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* a dedicated server).
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* It provides an interface between the GUI, the network (via CNetClientSession),
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* and the game (via CGame and CNetClientTurnManager).
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*/
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class CNetClient : public CFsm
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{
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NONCOPYABLE(CNetClient);
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friend class CNetFileReceiveTask_ClientRejoin;
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public:
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/**
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* Construct a client associated with the given game object.
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* The game must exist for the lifetime of this object.
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*/
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CNetClient(CGame* game);
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virtual ~CNetClient();
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/**
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* Set the user's name that will be displayed to all players.
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* This must not be called after the connection setup.
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*/
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void SetUserName(const CStrW& username);
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/**
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* Set up a connection to the remote networked server.
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* @param server IP address or host name to connect to
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* @return true on success, false on connection failure
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*/
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bool SetupConnection(const CStr& server);
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/**
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* Destroy the connection to the server.
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* This client probably cannot be used again.
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*/
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void DestroyConnection();
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/**
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* Poll the connection for messages from the server and process them, and send
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* any queued messages.
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* This must be called frequently (i.e. once per frame).
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*/
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void Poll();
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/**
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* Flush any queued outgoing network messages.
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* This should be called soon after sending a group of messages that may be batched together.
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*/
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void Flush();
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/**
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* Retrieves the next queued GUI message, and removes it from the queue.
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* The returned value is in the GetScriptInterface() JS context.
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*
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* This is the only mechanism for the networking code to send messages to
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* the GUI - it is pull-based (instead of push) so the engine code does not
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* need to know anything about the code structure of the GUI scripts.
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*
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* The structure of the messages is <code>{ "type": "...", ... }</code>.
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* The exact types and associated data are not specified anywhere - the
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* implementation and GUI scripts must make the same assumptions.
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*
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* @return next message, or the value 'undefined' if the queue is empty
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*/
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CScriptValRooted GuiPoll();
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/**
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* Add a message to the queue, to be read by GuiPoll.
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* The script value must be in the GetScriptInterface() JS context.
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*/
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void PushGuiMessage(const CScriptValRooted& message);
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/**
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* Return a concatenation of all messages in the GUI queue,
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* for test cases to easily verify the queue contents.
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*/
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std::wstring TestReadGuiMessages();
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/**
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* Get the script interface associated with this network client,
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* which is equivalent to the one used by the CGame in the constructor.
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*/
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ScriptInterface& GetScriptInterface();
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/**
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* Send a message to the server.
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* @param message message to send
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* @return true on success
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*/
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bool SendMessage(const CNetMessage* message);
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/**
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* Call when the network connection has been successfully initiated.
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*/
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void HandleConnect();
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/**
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* Call when the network connection has been lost.
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*/
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void HandleDisconnect(u32 reason);
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/**
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* Call when a message has been received from the network.
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*/
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bool HandleMessage(CNetMessage* message);
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/**
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* Call when the game has started and all data files have been loaded,
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* to signal to the server that we are ready to begin the game.
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*/
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void LoadFinished();
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void SendChatMessage(const std::wstring& text);
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private:
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// Net message / FSM transition handlers
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static bool OnConnect(void* context, CFsmEvent* event);
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static bool OnHandshake(void* context, CFsmEvent* event);
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static bool OnHandshakeResponse(void* context, CFsmEvent* event);
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static bool OnAuthenticate(void* context, CFsmEvent* event);
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static bool OnChat(void* context, CFsmEvent* event);
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static bool OnGameSetup(void* context, CFsmEvent* event);
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static bool OnPlayerAssignment(void* context, CFsmEvent* event);
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static bool OnInGame(void* context, CFsmEvent* event);
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static bool OnGameStart(void* context, CFsmEvent* event);
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static bool OnJoinSyncStart(void* context, CFsmEvent* event);
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static bool OnJoinSyncEndCommandBatch(void* context, CFsmEvent* event);
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static bool OnLoadedGame(void* context, CFsmEvent* event);
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/**
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* Take ownership of a session object, and use it for all network communication.
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*/
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void SetAndOwnSession(CNetClientSession* session);
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/**
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* Push a message onto the GUI queue listing the current player assignments.
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*/
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void PostPlayerAssignmentsToScript();
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CGame *m_Game;
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CStrW m_UserName;
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/// Current network session (or NULL if not connected)
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CNetClientSession* m_Session;
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/// Turn manager associated with the current game (or NULL if we haven't started the game yet)
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CNetClientTurnManager* m_ClientTurnManager;
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/// Unique-per-game identifier of this client, used to identify the sender of simulation commands
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u32 m_HostID;
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/// Latest copy of game setup attributes heard from the server
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CScriptValRooted m_GameAttributes;
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/// Latest copy of player assignments heard from the server
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PlayerAssignmentMap m_PlayerAssignments;
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/// Globally unique identifier to distinguish users beyond the lifetime of a single network session
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CStr m_GUID;
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/// Initialise m_GUID with a random value
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CStr GenerateGUID();
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/// Queue of messages for GuiPoll
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std::deque<CScriptValRooted> m_GuiMessageQueue;
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/// Serialized game state received when joining an in-progress game
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std::string m_JoinSyncBuffer;
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};
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/// Global network client for the standard game
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extern CNetClient *g_NetClient;
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#endif // NETCLIENT_H
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