Revize a53b1de8

re #8933 Testing DataParser, JisParser and WeatherParser

Server/ServerApp/Parser/Parsers/LogInParser.cs

@@ -77 +77 @@
         {
             List<ActivityInfo> loginInfo = new List<ActivityInfo>();
 
-            if (!File.Exists(path))
-                return loginInfo;
-
             List<LogInInstance> list = loader.LoadLoginFile(path);
+            if (list == null)
+                return loginInfo;
 
             // data for each faculty
             int[] recordedAmount = new int[TagInfo.buildings.Length];
@@ -161 +160 @@
         {
             List<ActivityInfo> loginInfo = new List<ActivityInfo>();
             
-            if (!File.Exists(path))
-                return loginInfo;
-
             List<LogInInstance> list = loader.LoadLoginFile(path);
+            if (list == null)
+                return loginInfo;
 
             // min/max hour taken into account
             int[] minmaxHour = new int[] { 7, 18 };