Implement mod communication channels (#6351)

Implement network communication for channels

* Implement ModChannel manager server side to route incoming messages from clients to other clients
* Add signal handler switch on client & ModChannelMgr on client to handle channels
* Add Lua API bindings + client packet sending + unittests
* Implement server message sending
* Add callback from received message handler to Lua API using registration method

1 files changed, 10 insertions, 0 deletions

diff --git a/src/client.h b/src/client.h
index 420d18895..36f564086 100644
--- a/src/client.h
+++ b/src/client.h
@@ -52,6 +52,7 @@ class IWritableNodeDefManager;
 //class IWritableCraftDefManager;
 class ClientMediaDownloader;
 struct MapDrawControl;
+class ModChannelMgr;
 class MtEventManager;
 struct PointedThing;
 class MapDatabase;
@@ -224,6 +225,8 @@ public:
 	void handleCommand_LocalPlayerAnimations(NetworkPacket* pkt);
 	void handleCommand_EyeOffset(NetworkPacket* pkt);
 	void handleCommand_UpdatePlayerList(NetworkPacket* pkt);
+	void handleCommand_ModChannelMsg(NetworkPacket *pkt);
+	void handleCommand_ModChannelSignal(NetworkPacket *pkt);
 	void handleCommand_SrpBytesSandB(NetworkPacket* pkt);
 	void handleCommand_CSMFlavourLimits(NetworkPacket *pkt);
 
@@ -424,6 +427,11 @@ public:
 		return m_csm_noderange_limit;
 	}
 
+	bool joinModChannel(const std::string &channel);
+	bool leaveModChannel(const std::string &channel);
+	bool sendModChannelMessage(const std::string &channel, const std::string &message);
+	ModChannel *getModChannel(const std::string &channel);
+
 private:
 
 	// Virtual methods from con::PeerHandler
@@ -580,4 +588,6 @@ private:
 	// CSM flavour limits byteflag
 	u64 m_csm_flavour_limits = CSMFlavourLimit::CSM_FL_NONE;
 	u32 m_csm_noderange_limit = 8;
+
+	std::unique_ptr<ModChannelMgr> m_modchannel_mgr;
 };