Change Util.cs to Helper.cs, and move ThreadSafeList to HISP.Util namespace.

HorseIsleServer/LibHISP/Util/Helper.cs

@@ -0,0 +1,52 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace HISP.Util
+{
+    public class Helper
+    {
+        // Thanks Stackoverflow (https://stackoverflow.com/questions/321370/how-can-i-convert-a-hex-string-to-a-byte-array)
+        private static int getHexVal(char hex)
+        {
+            int val = (int)hex;
+            return val - (val < 58 ? 48 : (val < 97 ? 55 : 87));
+        }
+        public static byte[] StringToByteArray(string hex)
+        {
+            if (hex.Length % 2 == 1)
+                throw new ArgumentException("The binary key cannot have an odd number of digits");
+
+            byte[] arr = new byte[hex.Length >> 1];
+
+            for (int i = 0; i < hex.Length >> 1; ++i)
+            {
+                arr[i] = (byte)((getHexVal(hex[i << 1]) << 4) + (getHexVal(hex[(i << 1) + 1])));
+            }
+
+            return arr;
+        }
+
+        public static double PointsToDistance(int x1, int y1, int x2, int y2)
+        {
+            return Math.Sqrt(Math.Pow((x2 - x1), 2) + Math.Pow((y2 - y1), 2));
+        }
+        public static string CapitalizeFirstLetter(string str)
+        {
+            char firstChar = char.ToUpper(str[0]);
+            return firstChar + str.Substring(1);
+        }
+        public static DateTime UnixTimeStampToDateTime(double unixTimeStamp)
+        {
+            // Unix timestamp is seconds past epoch
+            System.DateTime dtDateTime = new DateTime(1970, 1, 1, 0, 0, 0, 0, DateTimeKind.Utc);
+            dtDateTime = dtDateTime.AddSeconds(unixTimeStamp).ToUniversalTime();
+            return dtDateTime;
+        }
+
+        public static void ByteArrayToByteList(byte[] byteArray, List<byte> byteList)
+        {
+            byteList.AddRange(byteArray.ToList());
+        }
+    }
+}