Add per-player time offset

doc/lua_api.txt

@@ -3783,6 +3783,9 @@ This is basically a reference to a C++ `ServerActiveObject`
     * `0`...`1`: Overrides day-night ratio, controlling sunlight to a specific amount
     * `nil`: Disables override, defaulting to sunlight based on day-night cycle
 * `get_day_night_ratio()`: returns the ratio or nil if it isn't overridden
+* `set_time_offset(offset)`
+	* Adds offset to the time of the player (e.g. TimeOfDay is 12:00 and the offset of the player is 1000 then the time of the player is 13:00)
+* `get_time_offset()` returns the offset
 * `set_local_animation(stand/idle, walk, dig, walk+dig, frame_speed=frame_speed)`:
   set animation for player model in third person view
 

src/remoteplayer.h

@@ -69,6 +69,16 @@ class RemotePlayer : public Player
 		*ratio = m_day_night_ratio;
 	}
 
+	void setTimeOffset(u16 offset)
+	{
+		m_time_offset = offset;
+	}
+
+	void getTimeOffset(u16 *offset)
+	{
+		*offset = m_time_offset;
+	}
+
 	void setHotbarImage(const std::string &name) { hud_hotbar_image = name; }
 
 	std::string getHotbarImage() const { return hud_hotbar_image; }
@@ -161,6 +171,9 @@ class RemotePlayer : public Player
 
 	bool m_day_night_ratio_do_override = false;
 	float m_day_night_ratio;
+
+	u16 m_time_offset = 0;
+
 	std::string hud_hotbar_image = "";
 	std::string hud_hotbar_selected_image = "";
 

src/script/lua_api/l_object.cpp

@@ -1720,6 +1720,45 @@ int ObjectRef::l_get_day_night_ratio(lua_State *L)
 	return 1;
 }
 
+// set_time_offset(self, offset)
+int ObjectRef::l_set_time_offset(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+	ObjectRef *ref = checkobject(L, 1);
+	RemotePlayer *player = getplayer(ref);
+	if (player == NULL)
+		return 0;
+
+	int offset_i = luaL_checknumber(L, 2);
+	u16 offset = offset_i;
+	//Negative values
+	if (offset_i<0){
+		offset = 24000+offset_i;
+	}
+
+	player->setTimeOffset(offset);
+	getServer(L)->setTimeOfDay(getEnv(L)->getTimeOfDay());
+
+	lua_pushboolean(L, true);
+	return 1;
+}
+
+// get_time_offset(self)
+int ObjectRef::l_get_time_offset(lua_State *L)
+{
+	NO_MAP_LOCK_REQUIRED;
+	ObjectRef *ref = checkobject(L, 1);
+	RemotePlayer *player = getplayer(ref);
+	if (player == NULL)
+		return 0;
+
+	u16 offset;
+	player->getTimeOffset(&offset);
+	lua_pushnumber(L, offset);
+
+	return 1;
+}
+
 ObjectRef::ObjectRef(ServerActiveObject *object):
 	m_object(object)
 {
@@ -1854,6 +1893,8 @@ const luaL_Reg ObjectRef::methods[] = {
 	luamethod(ObjectRef, get_clouds),
 	luamethod(ObjectRef, override_day_night_ratio),
 	luamethod(ObjectRef, get_day_night_ratio),
+	luamethod(ObjectRef, set_time_offset),
+	luamethod(ObjectRef, get_time_offset),
 	luamethod(ObjectRef, set_local_animation),
 	luamethod(ObjectRef, get_local_animation),
 	luamethod(ObjectRef, set_eye_offset),

src/script/lua_api/l_object.h

@@ -316,6 +316,12 @@ class ObjectRef : public ModApiBase {
 	// get_day_night_ratio(self)
 	static int l_get_day_night_ratio(lua_State *L);
 
+	// set_time_offset(self, offset)
+	static int l_set_time_offset(lua_State *L);
+
+	// get_time_offset(self)
+	static int l_get_time_offset(lua_State *L);
+
 	// set_local_animation(self, {stand/idle}, {walk}, {dig}, {walk+dig}, frame_speed)
 	static int l_set_local_animation(lua_State *L);
 

src/server.cpp

@@ -1800,13 +1800,22 @@ void Server::SendOverrideDayNightRatio(session_t peer_id, bool do_override,
 
 void Server::SendTimeOfDay(session_t peer_id, u16 time, f32 time_speed)
 {
-	NetworkPacket pkt(TOCLIENT_TIME_OF_DAY, 0, peer_id);
-	pkt << time << time_speed;
 
 	if (peer_id == PEER_ID_INEXISTENT) {
-		m_clients.sendToAll(&pkt);
+		for (auto &client_name : m_clients.getPlayerNames()) {
+			RemotePlayer *player = m_env->getPlayer(client_name.c_str());
+			peer_id = player->getPeerId();
+			NetworkPacket pkt(TOCLIENT_TIME_OF_DAY, 0, peer_id);
+			u16 time_offset;
+			player->getTimeOffset(&time_offset);
+			u16 ntime = (time+time_offset);
+			pkt << ntime << time_speed;
+			Send(&pkt);
+		}
 	}
 	else {
+		NetworkPacket pkt(TOCLIENT_TIME_OF_DAY, 0, peer_id);
+		pkt << time << time_speed;
 		Send(&pkt);
 	}
 }