Chat protocol rewrite (#5117)

* New TOCLIENT_CHAT_MESSAGE packet

* Rename old packet to TOCLIENT_CHAT_MESSAGE_OLD for compat
* Handle TOCLIENT_CHAT_MESSAGE new structure client side
* Client chat queue should use a specific object
* SendChatMessage: use the right packet depending on protocol version (not complete yet)
* Add chatmessage(type) objects and handle them client side (partially)
* Use ChatMessage instead of std::wstring server side

* Update with timestamp support

16 files changed, 251 insertions, 51 deletions

diff --git a/src/chatmessage.h b/src/chatmessage.h
new file mode 100644
index 000000000..3ef855098
--- /dev/null
+++ b/src/chatmessage.h
@@ -0,0 +1,51 @@
+/*
+Minetest
+Copyright (C) 2017 nerzhul, Loic Blot <loic.blot@unix-experience.fr>
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU Lesser General Public License as published by
+the Free Software Foundation; either version 2.1 of the License, or
+(at your option) any later version.
+
+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 Lesser General Public License for more details.
+
+You should have received a copy of the GNU Lesser General Public License along
+with this program; if not, write to the Free Software Foundation, Inc.,
+51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#ifndef MT_CHATMESSAGE_H
+#define MT_CHATMESSAGE_H
+
+#include <string>
+#include <ctime>
+
+enum ChatMessageType
+{
+	CHATMESSAGE_TYPE_RAW = 0,
+	CHATMESSAGE_TYPE_NORMAL = 1,
+	CHATMESSAGE_TYPE_ANNOUNCE = 2,
+	CHATMESSAGE_TYPE_SYSTEM = 3,
+	CHATMESSAGE_TYPE_MAX = 4,
+};
+
+struct ChatMessage
+{
+	ChatMessage(const std::wstring &m = L"") : message(m) {}
+
+	ChatMessage(ChatMessageType t, const std::wstring &m, const std::wstring &s = L"",
+			std::time_t ts = std::time(0))
+	    : type(t), message(m), sender(s), timestamp(ts)
+	{
+	}
+
+	ChatMessageType type = CHATMESSAGE_TYPE_RAW;
+	std::wstring message = L"";
+	std::wstring sender = L"";
+	std::time_t timestamp = std::time(0);
+};
+
+#endif
diff --git a/src/client.cpp b/src/client.cpp
index 0f689a714..443059c36 100644
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -47,6 +47,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "guiscalingfilter.h"
 #include "script/scripting_client.h"
 #include "game.h"
+#include "chatmessage.h"
 
 extern gui::IGUIEnvironment* guienv;
 
@@ -1518,12 +1519,34 @@ u16 Client::getHP()
 	return player->hp;
 }
 
-bool Client::getChatMessage(std::wstring &message)
+bool Client::getChatMessage(std::wstring &res)
 {
-	if(m_chat_queue.size() == 0)
+	if (m_chat_queue.empty())
 		return false;
-	message = m_chat_queue.front();
+
+	ChatMessage *chatMessage = m_chat_queue.front();
 	m_chat_queue.pop();
+
+	res = L"";
+
+	switch (chatMessage->type) {
+		case CHATMESSAGE_TYPE_RAW:
+		case CHATMESSAGE_TYPE_ANNOUNCE:
+		case CHATMESSAGE_TYPE_SYSTEM:
+			res = chatMessage->message;
+			break;
+		case CHATMESSAGE_TYPE_NORMAL: {
+			if (!chatMessage->sender.empty())
+				res = L"<" + chatMessage->sender + L"> " + chatMessage->message;
+			else
+				res = chatMessage->message;
+			break;
+		}
+		default:
+			break;
+	}
+
+	delete chatMessage;
 	return true;
 }
 
@@ -1542,14 +1565,13 @@ void Client::typeChatMessage(const std::wstring &message)
 	sendChatMessage(message);
 
 	// Show locally
-	if (message[0] != L'/')
-	{
+	if (message[0] != L'/') {
 		// compatibility code
 		if (m_proto_ver < 29) {
 			LocalPlayer *player = m_env.getLocalPlayer();
 			assert(player);
 			std::wstring name = narrow_to_wide(player->getName());
-			pushToChatQueue((std::wstring)L"<" + name + L"> " + message);
+			pushToChatQueue(new ChatMessage(CHATMESSAGE_TYPE_NORMAL, message, name));
 		}
 	}
 }
@@ -1806,7 +1828,8 @@ void Client::makeScreenshot()
 			} else {
 				sstr << "Failed to save screenshot '" << filename << "'";
 			}
-			pushToChatQueue(narrow_to_wide(sstr.str()));
+			pushToChatQueue(new ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+					narrow_to_wide(sstr.str())));
 			infostream << sstr.str() << std::endl;
 			image->drop();
 		}
diff --git a/src/client.h b/src/client.h
index 0255b2803..0f0cd8a5e 100644
--- a/src/client.h
+++ b/src/client.h
@@ -43,6 +43,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #define CLIENT_CHAT_MESSAGE_LIMIT_PER_10S 10.0f
 
 struct MeshMakeData;
+struct ChatMessage;
 class MapBlockMesh;
 class IWritableTextureSource;
 class IWritableShaderSource;
@@ -328,7 +329,8 @@ public:
 	void handleCommand_BlockData(NetworkPacket* pkt);
 	void handleCommand_Inventory(NetworkPacket* pkt);
 	void handleCommand_TimeOfDay(NetworkPacket* pkt);
-	void handleCommand_ChatMessage(NetworkPacket* pkt);
+	void handleCommand_ChatMessageOld(NetworkPacket *pkt);
+	void handleCommand_ChatMessage(NetworkPacket *pkt);
 	void handleCommand_ActiveObjectRemoveAdd(NetworkPacket* pkt);
 	void handleCommand_ActiveObjectMessages(NetworkPacket* pkt);
 	void handleCommand_Movement(NetworkPacket* pkt);
@@ -520,9 +522,9 @@ public:
 
 	void makeScreenshot();
 
-	inline void pushToChatQueue(const std::wstring &input)
+	inline void pushToChatQueue(ChatMessage *cec)
 	{
-		m_chat_queue.push(input);
+		m_chat_queue.push(cec);
 	}
 
 	ClientScripting *getScript() { return m_script; }
@@ -629,10 +631,10 @@ private:
 	// 0 <= m_daynight_i < DAYNIGHT_CACHE_COUNT
 	//s32 m_daynight_i;
 	//u32 m_daynight_ratio;
-	std::queue<std::wstring> m_chat_queue;
 	std::queue<std::wstring> m_out_chat_queue;
 	u32 m_last_chat_message_sent;
 	float m_chat_message_allowance = 5.0f;
+	std::queue<ChatMessage *> m_chat_queue;
 
 	// The authentication methods we can use to enter sudo mode (=change password)
 	u32 m_sudo_auth_methods;
diff --git a/src/clientiface.cpp b/src/clientiface.cpp
index a629ccee7..361315c3b 100644
--- a/src/clientiface.cpp
+++ b/src/clientiface.cpp
@@ -693,6 +693,32 @@ void ClientInterface::sendToAll(NetworkPacket *pkt)
 	}
 }
 
+void ClientInterface::sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt,
+		u16 min_proto_ver)
+{
+	MutexAutoLock clientslock(m_clients_mutex);
+	for (std::unordered_map<u16, RemoteClient*>::iterator i = m_clients.begin();
+			i != m_clients.end(); ++i) {
+		RemoteClient *client = i->second;
+		NetworkPacket *pkt_to_send = nullptr;
+
+		if (client->net_proto_version >= min_proto_ver) {
+			pkt_to_send = pkt;
+		} else if (client->net_proto_version != 0) {
+			pkt_to_send = legacypkt;
+		} else {
+			warningstream << "Client with unhandled version to handle: '"
+				<< client->net_proto_version << "'";
+			continue;
+		}
+
+		m_con->Send(client->peer_id,
+			clientCommandFactoryTable[pkt_to_send->getCommand()].channel,
+			pkt_to_send,
+			clientCommandFactoryTable[pkt_to_send->getCommand()].reliable);
+	}
+}
+
 RemoteClient* ClientInterface::getClientNoEx(u16 peer_id, ClientState state_min)
 {
 	MutexAutoLock clientslock(m_clients_mutex);
diff --git a/src/clientiface.h b/src/clientiface.h
index 09855a372..ce74cfece 100644
--- a/src/clientiface.h
+++ b/src/clientiface.h
@@ -434,6 +434,7 @@ public:
 
 	/* send to all clients */
 	void sendToAll(NetworkPacket *pkt);
+	void sendToAllCompat(NetworkPacket *pkt, NetworkPacket *legacypkt, u16 min_proto_ver);
 
 	/* delete a client */
 	void DeleteClient(u16 peer_id);
diff --git a/src/game.cpp b/src/game.cpp
index 88ae9c2b7..639cc29c3 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -976,8 +976,7 @@ static void updateChat(Client &client, f32 dtime, bool show_debug,
 	}
 
 	// Get new messages from client
-	std::wstring message;
-
+	std::wstring message = L"";
 	while (client.getChatMessage(message)) {
 		chat_backend.addUnparsedMessage(message);
 	}
diff --git a/src/network/clientopcodes.cpp b/src/network/clientopcodes.cpp
index cb504b373..f39dd6db6 100644
--- a/src/network/clientopcodes.cpp
+++ b/src/network/clientopcodes.cpp
@@ -71,8 +71,8 @@ const ToClientCommandHandler toClientCommandTable[TOCLIENT_NUM_MSG_TYPES] =
 	null_command_handler,
 	null_command_handler,
 	null_command_handler,
-	null_command_handler,
-	{ "TOCLIENT_CHAT_MESSAGE",             TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ChatMessage }, // 0x30
+	{ "TOCLIENT_CHAT_MESSAGE",             TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ChatMessage }, // 0x2F
+	{ "TOCLIENT_CHAT_MESSAGE_OLD",         TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ChatMessageOld }, // 0x30
 	{ "TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD", TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ActiveObjectRemoveAdd }, // 0x31
 	{ "TOCLIENT_ACTIVE_OBJECT_MESSAGES",   TOCLIENT_STATE_CONNECTED, &Client::handleCommand_ActiveObjectMessages }, // 0x32
 	{ "TOCLIENT_HP",                       TOCLIENT_STATE_CONNECTED, &Client::handleCommand_HP }, // 0x33
diff --git a/src/network/clientpackethandler.cpp b/src/network/clientpackethandler.cpp
index e6f0d7092..bb4db6f47 100644
--- a/src/network/clientpackethandler.cpp
+++ b/src/network/clientpackethandler.cpp
@@ -20,6 +20,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "client.h"
 
 #include "util/base64.h"
+#include "chatmessage.h"
 #include "clientmedia.h"
 #include "log.h"
 #include "map.h"
@@ -142,7 +143,9 @@ void Client::handleCommand_AcceptSudoMode(NetworkPacket* pkt)
 }
 void Client::handleCommand_DenySudoMode(NetworkPacket* pkt)
 {
-	pushToChatQueue(L"Password change denied. Password NOT changed.");
+	ChatMessage *chatMessage = new ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+			L"Password change denied. Password NOT changed.");
+	pushToChatQueue(chatMessage);
 	// reset everything and be sad
 	deleteAuthData();
 }
@@ -395,7 +398,7 @@ void Client::handleCommand_TimeOfDay(NetworkPacket* pkt)
 			<< " dr=" << dr << std::endl;
 }
 
-void Client::handleCommand_ChatMessage(NetworkPacket* pkt)
+void Client::handleCommand_ChatMessageOld(NetworkPacket *pkt)
 {
 	/*
 		u16 command
@@ -413,8 +416,43 @@ void Client::handleCommand_ChatMessage(NetworkPacket* pkt)
 	}
 
 	// If chat message not consummed by client lua API
+	// @TODO send this to CSM using ChatMessage object
 	if (!moddingEnabled() || !m_script->on_receiving_message(wide_to_utf8(message))) {
-		pushToChatQueue(message);
+		pushToChatQueue(new ChatMessage(message));
+	}
+}
+
+void Client::handleCommand_ChatMessage(NetworkPacket *pkt)
+{
+	/*
+		u8 version
+		u8 message_type
+		u16 sendername length
+		wstring sendername
+		u16 length
+		wstring message
+	 */
+
+	ChatMessage *chatMessage = new ChatMessage();
+	u8 version, message_type;
+	*pkt >> version >> message_type;
+
+	if (version != 1 || message_type >= CHATMESSAGE_TYPE_MAX) {
+		delete chatMessage;
+		return;
+	}
+
+	*pkt >> chatMessage->sender >> chatMessage->message >> chatMessage->timestamp;
+
+	chatMessage->type = (ChatMessageType) message_type;
+
+	// @TODO send this to CSM using ChatMessage object
+	if (!moddingEnabled() || !m_script->on_receiving_message(
+			wide_to_utf8(chatMessage->message))) {
+		pushToChatQueue(chatMessage);
+	} else {
+		// Message was consumed by CSM and should not handled by client, destroying
+		delete chatMessage;
 	}
 }
 
diff --git a/src/network/networkpacket.cpp b/src/network/networkpacket.cpp
index 48cf3a374..78c73d253 100644
--- a/src/network/networkpacket.cpp
+++ b/src/network/networkpacket.cpp
@@ -275,6 +275,12 @@ NetworkPacket& NetworkPacket::operator<<(u64 src)
 	return *this;
 }
 
+NetworkPacket& NetworkPacket::operator<<(std::time_t src)
+{
+	*this << (u64) src;
+	return *this;
+}
+
 NetworkPacket& NetworkPacket::operator<<(float src)
 {
 	checkDataSize(4);
@@ -360,6 +366,16 @@ NetworkPacket& NetworkPacket::operator>>(u64& dst)
 	return *this;
 }
 
+NetworkPacket& NetworkPacket::operator>>(std::time_t& dst)
+{
+	checkReadOffset(m_read_offset, 8);
+
+	dst = readU64(&m_data[m_read_offset]);
+
+	m_read_offset += 8;
+	return *this;
+}
+
 NetworkPacket& NetworkPacket::operator>>(float& dst)
 {
 	checkReadOffset(m_read_offset, 4);
diff --git a/src/network/networkpacket.h b/src/network/networkpacket.h
index 3058a22ca..7eb8cc3ff 100644
--- a/src/network/networkpacket.h
+++ b/src/network/networkpacket.h
@@ -84,6 +84,9 @@ public:
 		NetworkPacket& operator>>(u64& dst);
 		NetworkPacket& operator<<(u64 src);
 
+		NetworkPacket& operator>>(std::time_t& dst);
+		NetworkPacket& operator<<(std::time_t src);
+
 		NetworkPacket& operator>>(float& dst);
 		NetworkPacket& operator<<(float src);
 
diff --git a/src/network/networkprotocol.h b/src/network/networkprotocol.h
index 8304d3003..759334839 100644
--- a/src/network/networkprotocol.h
+++ b/src/network/networkprotocol.h
@@ -160,9 +160,17 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 			instead of guessing based on the active object list.
 	PROTOCOL VERSION 34:
 		Add sound pitch
+	PROTOCOL VERSION 35:
+ 		Rename TOCLIENT_CHAT_MESSAGE to TOCLIENT_CHAT_MESSAGE_OLD (0x30)
+ 		Add TOCLIENT_CHAT_MESSAGE (0x2F)
+ 			This chat message is a signalisation message containing various informations:
+ 			* timestamp
+ 			* sender
+ 			* type (RAW, NORMAL, ANNOUNCE, SYSTEM)
+ 			* content
 */
 
-#define LATEST_PROTOCOL_VERSION 34
+#define LATEST_PROTOCOL_VERSION 35
 
 // Server's supported network protocol range
 #define SERVER_PROTOCOL_VERSION_MIN 24
@@ -307,7 +315,17 @@ enum ToClientCommand
 
 	// (oops, there is some gap here)
 
-	TOCLIENT_CHAT_MESSAGE = 0x30,
+	TOCLIENT_CHAT_MESSAGE = 0x2F,
+	/*
+		u8 version
+		u8 message_type
+		u16 sendername length
+		wstring sendername
+		u16 length
+		wstring message
+	*/
+
+	TOCLIENT_CHAT_MESSAGE_OLD = 0x30, // Deprecated by proto v35
 	/*
 		u16 length
 		wstring message
diff --git a/src/network/serveropcodes.cpp b/src/network/serveropcodes.cpp
index 3f9706d6a..208214369 100644
--- a/src/network/serveropcodes.cpp
+++ b/src/network/serveropcodes.cpp
@@ -160,8 +160,8 @@ const ClientCommandFactory clientCommandFactoryTable[TOCLIENT_NUM_MSG_TYPES] =
 	null_command_factory,
 	null_command_factory,
 	null_command_factory,
-	null_command_factory,
-	{ "TOCLIENT_CHAT_MESSAGE",             0, true }, // 0x30
+	{ "TOCLIENT_CHAT_MESSAGE",             0, true }, // 0x2F
+	{ "TOCLIENT_CHAT_MESSAGE_OLD",         0, true }, // 0x30
 	{ "TOCLIENT_ACTIVE_OBJECT_REMOVE_ADD", 0, true }, // 0x31
 	{ "TOCLIENT_ACTIVE_OBJECT_MESSAGES",   0, true }, // 0x32 Special packet, sent by 0 (rel) and 1 (unrel) channel
 	{ "TOCLIENT_HP",                       0, true }, // 0x33
diff --git a/src/network/serverpackethandler.cpp b/src/network/serverpackethandler.cpp
index a2882b2e7..b87daba6b 100644
--- a/src/network/serverpackethandler.cpp
+++ b/src/network/serverpackethandler.cpp
@@ -17,6 +17,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */
 
+#include <chatmessage.h>
 #include "server.h"
 #include "log.h"
 
@@ -644,8 +645,10 @@ void Server::handleCommand_Init2(NetworkPacket* pkt)
 
 	// Warnings about protocol version can be issued here
 	if (getClient(pkt->getPeerId())->net_proto_version < LATEST_PROTOCOL_VERSION) {
-		SendChatMessage(pkt->getPeerId(), L"# Server: WARNING: YOUR CLIENT'S "
-				L"VERSION MAY NOT BE FULLY COMPATIBLE WITH THIS SERVER!");
+		SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+				L"# Server: WARNING: YOUR CLIENT'S VERSION MAY NOT BE FULLY COMPATIBLE "
+				L"WITH THIS SERVER!"));
+
 	}
 }
 
@@ -1077,11 +1080,11 @@ void Server::handleCommand_ChatMessage(NetworkPacket* pkt)
 	std::string name = player->getName();
 	std::wstring wname = narrow_to_wide(name);
 
-	std::wstring answer_to_sender = handleChat(name, wname, message,
-		true, dynamic_cast<RemotePlayer *>(player));
+	std::wstring answer_to_sender = handleChat(name, wname, message, true, player);
 	if (!answer_to_sender.empty()) {
 		// Send the answer to sender
-		SendChatMessage(pkt->getPeerId(), answer_to_sender);
+		SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_NORMAL,
+				answer_to_sender, wname));
 	}
 }
 
@@ -1171,7 +1174,8 @@ void Server::handleCommand_Password(NetworkPacket* pkt)
 		infostream<<"Server: " << player->getName() <<
 				" supplied invalid password hash" << std::endl;
 		// Wrong old password supplied!!
-		SendChatMessage(pkt->getPeerId(), L"Invalid new password hash supplied. Password NOT changed.");
+		SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+				L"Invalid new password hash supplied. Password NOT changed."));
 		return;
 	}
 
@@ -1186,18 +1190,21 @@ void Server::handleCommand_Password(NetworkPacket* pkt)
 	if (oldpwd != checkpwd) {
 		infostream << "Server: invalid old password" << std::endl;
 		// Wrong old password supplied!!
-		SendChatMessage(pkt->getPeerId(), L"Invalid old password supplied. Password NOT changed.");
+		SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+				L"Invalid old password supplied. Password NOT changed."));
 		return;
 	}
 
 	bool success = m_script->setPassword(playername, newpwd);
 	if (success) {
 		actionstream << player->getName() << " changes password" << std::endl;
-		SendChatMessage(pkt->getPeerId(), L"Password change successful.");
+		SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+				L"Password change successful."));
 	} else {
 		actionstream << player->getName() << " tries to change password but "
 				<< "it fails" << std::endl;
-		SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable.");
+		SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+				L"Password change failed or unavailable."));
 	}
 }
 
@@ -1853,11 +1860,13 @@ void Server::handleCommand_FirstSrp(NetworkPacket* pkt)
 		bool success = m_script->setPassword(playername, pw_db_field);
 		if (success) {
 			actionstream << playername << " changes password" << std::endl;
-			SendChatMessage(pkt->getPeerId(), L"Password change successful.");
+			SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+					L"Password change successful."));
 		} else {
 			actionstream << playername << " tries to change password but "
 				<< "it fails" << std::endl;
-			SendChatMessage(pkt->getPeerId(), L"Password change failed or unavailable.");
+			SendChatMessage(pkt->getPeerId(), ChatMessage(CHATMESSAGE_TYPE_SYSTEM,
+					L"Password change failed or unavailable."));
 		}
 	}
 }
diff --git a/src/script/lua_api/l_client.cpp b/src/script/lua_api/l_client.cpp
index 1077d5f2d..e7d75cce7 100644
--- a/src/script/lua_api/l_client.cpp
+++ b/src/script/lua_api/l_client.cpp
@@ -19,6 +19,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 */
 
 #include "l_client.h"
+#include "chatmessage.h"
 #include "clientenvironment.h"
 #include "common/c_content.h"
 #include "common/c_converter.h"
@@ -80,7 +81,7 @@ int ModApiClient::l_display_chat_message(lua_State *L)
 		return 0;
 
 	std::string message = luaL_checkstring(L, 1);
-	getClient(L)->pushToChatQueue(utf8_to_wide(message));
+	getClient(L)->pushToChatQueue(new ChatMessage(utf8_to_wide(message)));
 	lua_pushboolean(L, true);
 	return 1;
 }
diff --git a/src/server.cpp b/src/server.cpp
index 95d2371ff..33384816c 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -60,6 +60,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/sha1.h"
 #include "util/hex.h"
 #include "database.h"
+#include "chatmessage.h"
 
 class ClientNotFoundException : public BaseException
 {
@@ -304,7 +305,8 @@ Server::~Server()
 	infostream<<"Server destructing"<<std::endl;
 
 	// Send shutdown message
-	SendChatMessage(PEER_ID_INEXISTENT, L"*** Server shutting down");
+	SendChatMessage(PEER_ID_INEXISTENT, ChatMessage(CHATMESSAGE_TYPE_ANNOUNCE,
+			L"*** Server shutting down"));
 
 	{
 		MutexAutoLock envlock(m_env_mutex);
@@ -1107,7 +1109,7 @@ PlayerSAO* Server::StageTwoClientInit(u16 peer_id)
 	// Note things in chat if not in simple singleplayer mode
 	if (!m_simple_singleplayer_mode && g_settings->getBool("show_statusline_on_connect")) {
 		// Send information about server to player in chat
-		SendChatMessage(peer_id, getStatusString());
+		SendChatMessage(peer_id, ChatMessage(CHATMESSAGE_TYPE_SYSTEM, getStatusString()));
 	}
 	Address addr = getPeerAddress(player->peer_id);
 	std::string ip_str = addr.serializeString();
@@ -1615,21 +1617,29 @@ void Server::SendInventory(PlayerSAO* playerSAO)
 	Send(&pkt);
 }
 
-void Server::SendChatMessage(u16 peer_id, const std::wstring &message)
+void Server::SendChatMessage(u16 peer_id, const ChatMessage &message)
 {
 	DSTACK(FUNCTION_NAME);
+
+	NetworkPacket legacypkt(TOCLIENT_CHAT_MESSAGE_OLD, 0, peer_id);
+	legacypkt << message.message;
+
+	NetworkPacket pkt(TOCLIENT_CHAT_MESSAGE, 0, peer_id);
+	u8 version = 1;
+	u8 type = message.type;
+	pkt << version << type << std::wstring(L"") << message.message << message.timestamp;
+
 	if (peer_id != PEER_ID_INEXISTENT) {
-		NetworkPacket pkt(TOCLIENT_CHAT_MESSAGE, 0, peer_id);
+		RemotePlayer *player = m_env->getPlayer(peer_id);
+		if (!player)
+			return;
 
-		if (m_clients.getProtocolVersion(peer_id) < 27)
-			pkt << unescape_enriched(message);
+		if (player->protocol_version < 35)
+			Send(&legacypkt);
 		else
-			pkt << message;
-
-		Send(&pkt);
+			Send(&pkt);
 	} else {
-		for (u16 id : m_clients.getClientIDs())
-			SendChatMessage(id, message);
+		m_clients.sendToAllCompat(&pkt, &legacypkt, 35);
 	}
 }
 
@@ -2811,8 +2821,10 @@ void Server::DeleteClient(u16 peer_id, ClientDeletionReason reason)
 	}
 
 	// Send leave chat message to all remaining clients
-	if(message.length() != 0)
-		SendChatMessage(PEER_ID_INEXISTENT,message);
+	if (!message.empty()) {
+		SendChatMessage(PEER_ID_INEXISTENT,
+				ChatMessage(CHATMESSAGE_TYPE_ANNOUNCE, message));
+	}
 }
 
 void Server::UpdateCrafting(RemotePlayer *player)
@@ -2934,7 +2946,7 @@ std::wstring Server::handleChat(const std::string &name, const std::wstring &wna
 		for (u16 i = 0; i < clients.size(); i++) {
 			u16 cid = clients[i];
 			if (cid != peer_id_to_avoid_sending)
-				SendChatMessage(cid, line);
+				SendChatMessage(cid, ChatMessage(line));
 		}
 	}
 	return L"";
@@ -3096,7 +3108,7 @@ void Server::notifyPlayer(const char *name, const std::wstring &msg)
 	if (player->peer_id == PEER_ID_INEXISTENT)
 		return;
 
-	SendChatMessage(player->peer_id, msg);
+	SendChatMessage(player->peer_id, ChatMessage(msg));
 }
 
 bool Server::showFormspec(const char *playername, const std::string &formspec,
@@ -3271,7 +3283,7 @@ bool Server::overrideDayNightRatio(RemotePlayer *player, bool do_override,
 
 void Server::notifyPlayers(const std::wstring &msg)
 {
-	SendChatMessage(PEER_ID_INEXISTENT,msg);
+	SendChatMessage(PEER_ID_INEXISTENT, ChatMessage(msg));
 }
 
 void Server::spawnParticle(const std::string &playername, v3f pos,
diff --git a/src/server.h b/src/server.h
index b60482a75..112a94863 100644
--- a/src/server.h
+++ b/src/server.h
@@ -38,6 +38,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "clientiface.h"
 #include "remoteplayer.h"
 #include "network/networkpacket.h"
+#include "chatmessage.h"
 #include <string>
 #include <list>
 #include <map>
@@ -388,7 +389,7 @@ private:
 	void SetBlocksNotSent(std::map<v3s16, MapBlock *>& block);
 
 
-	void SendChatMessage(u16 peer_id, const std::wstring &message);
+	void SendChatMessage(u16 peer_id, const ChatMessage &message);
 	void SendTimeOfDay(u16 peer_id, u16 time, f32 time_speed);
 	void SendPlayerHP(u16 peer_id);