Created class for dealing with unknown HAN port of Kaifa meter

Code/HanDebugger/HanDebugger/HanDebugger.csproj

@@ -44,6 +44,7 @@
   </ItemGroup>
   <ItemGroup>
     <Compile Include="Crc16.cs" />
+    <Compile Include="KaifaHanBeta.cs" />
     <Compile Include="Program.cs" />
     <Compile Include="Properties\AssemblyInfo.cs" />
     <Compile Include="Reader.cs" />

Code/HanDebugger/HanDebugger/KaifaHanBeta.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace HanDebugger
+{
+    // As it seems Kaifa/Valider put some premature firmware on my AMS,
+    // there's need for some dirty hacks to get any information
+    public class KaifaHanBeta
+    {
+        public const byte ListUnknown = 0x00;
+        public const byte List1 = 0x01;
+        public const byte List2 = 0x0D;
+        public const byte List3 = 0x12;
+
+        public static byte GetPackageID(byte[] package, int start, int length)
+        {
+            switch (package[start + 23])
+            {
+                case List1:
+                case List2:
+                case List3:
+                    return package[start + 23];
+                default:
+                    return 0x00;
+            }
+        }
+
+        public static double GetPackageTime(byte[] package, int start, int length)
+        {
+            const int timeStart = 10;
+            int year = package[start + timeStart] << 8 |
+                package[start + timeStart + 1];
+
+            int month = package[start + timeStart + 2];
+            int day = package[start + timeStart + 3];
+            int hour = package[start + timeStart + 5];
+            int minute = package[start + timeStart + 6];
+            int second = package[start + timeStart + 7];
+
+
+            return new DateTime(year, month, day, hour, minute, second).Subtract(new DateTime(1970, 1, 1, 0, 0, 0, 0)).TotalSeconds;
+        }
+    }
+}