added previous session time

Author: dorin-ga

include/GameAnalytics/GameAnalytics.h

@@ -120,6 +120,7 @@ namespace gameanalytics
 
          static int64_t getElapsedSessionTime();
          static int64_t getElapsedTimeFromAllSessions();
+         static int64_t getElapsedTimeForPreviousSession();
 
          // game state changes
          // will affect how session is started / ended

source/gameanalytics/GAState.cpp

@@ -539,6 +539,11 @@ namespace gameanalytics
             return "";
         }
 
+        int64_t GAState::getLastSessionLength() const
+        {
+            return _lastSessionTime;
+        }
+
         int64_t GAState::getTotalSessionLength() const
         {
             return _totalElapsedSessionTime + calculateSessionLength<std::chrono::seconds>();
@@ -590,10 +595,11 @@ namespace gameanalytics
 
                 try
                 {
-                    std::string cachedSessionTime = utilities::getOptionalValue<std::string>(state_dict, "total_session_time", "0");
+                    std::string cachedLastSessionTime = utilities::getOptionalValue<std::string>(state_dict, "last_session_time", "0");
+                    std::string cachedTotalSessionTime = utilities::getOptionalValue<std::string>(state_dict, "total_session_time", "0");
 
-                    _totalElapsedSessionTime = std::stoull(cachedSessionTime);
-
+                    _lastSessionTime = std::stoull(cachedTotalSessionTime);
+                    _totalElapsedSessionTime = std::stoull(cachedTotalSessionTime);
                 }
                 catch(const std::exception& e)
                 {
@@ -1094,7 +1100,10 @@ namespace gameanalytics
 
         void GAState::updateTotalSessionTime()
         {
-            _totalElapsedSessionTime = getTotalSessionLength();
+            _lastSessionTime = calculateSessionLength();
+            _totalElapsedSessionTime += _lastSessionTime;
+            
+            _gaStore.setState("last_session_time",  std::to_string(_lastSessionTime));
             _gaStore.setState("total_session_time", std::to_string(_totalElapsedSessionTime));
         }
 

source/gameanalytics/GAState.h

@@ -169,6 +169,8 @@ namespace gameanalytics
 
                 int64_t getTotalSessionLength() const;
 
+                int64_t getLastSessionLength() const;
+
                 void populateConfigurations(json& sdkConfig);
 
                 json getRemoteConfigAnnotations();
@@ -229,6 +231,7 @@ namespace gameanalytics
             int64_t _sessionNum = 0;
             int64_t _transactionNum = 0;
 
+            int64_t _lastSessionTime = 0;
             int64_t _totalElapsedSessionTime = 0;
             std::chrono::high_resolution_clock::time_point _startTimepoint;
 

source/gameanalytics/GameAnalytics.cpp

@@ -998,4 +998,9 @@ namespace gameanalytics
         return state::GAState::getInstance().calculateSessionLength<std::chrono::seconds>();
     }
 
+    int64_t GameAnalytics::getElapsedTimeForPreviousSession()
+    {
+        return state::GAState::getInstance().getLastSessionLength();
+    }
+
 } // namespace gameanalytics