feat(Core/Time): Implement saparated manager for game time (#8630)

src/server/game/Time/GameTime.cpp

@@ -0,0 +1,70 @@
+/*
+ * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Affero General Public License as published by the
+ * Free Software Foundation; either version 3 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 Affero 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/>.
+ */
+
+#include "GameTime.h"
+#include "Timer.h"
+
+namespace GameTime
+{
+    using namespace std::chrono;
+
+    Seconds const StartTime = GetEpochTime();
+
+    Seconds GameTime = GetEpochTime();
+    Milliseconds GameMSTime = 0ms;
+
+    SystemTimePoint GameTimeSystemPoint = SystemTimePoint::min();
+    TimePoint GameTimeSteadyPoint = TimePoint::min();
+
+    Seconds GetStartTime()
+    {
+        return StartTime;
+    }
+
+    Seconds GetGameTime()
+    {
+        return GameTime;
+    }
+
+    Milliseconds GetGameTimeMS()
+    {
+        return GameMSTime;
+    }
+
+    SystemTimePoint GetSystemTime()
+    {
+        return GameTimeSystemPoint;
+    }
+
+    TimePoint Now()
+    {
+        return GameTimeSteadyPoint;
+    }
+
+    Seconds GetUptime()
+    {
+        return GameTime - StartTime;
+    }
+
+    void UpdateGameTimers()
+    {
+        GameTime = GetEpochTime();
+        GameMSTime = GetTimeMS();
+        GameTimeSystemPoint = system_clock::now();
+        GameTimeSteadyPoint = steady_clock::now();
+    }
+}