Implement IProfile Get and GetBase (#266)

* implement IProfile Get(Base)

* use default user

* changed userid

Ryujinx.HLE/OsHle/Services/Acc/ProfileBase.cs

@@ -0,0 +1,52 @@
+using Ryujinx.HLE.OsHle.Utilities;
+using System;
+using System.Linq;
+
+namespace Ryujinx.HLE.OsHle.Services.Acc
+{
+    struct ProfileBase
+    {
+        public UserId UserId;
+        public long   Timestamp;
+        public string Username;
+
+        public ProfileBase(Profile User)
+        {
+            UserId    = new UserId(User.UserId);
+            Username  = User.Username;
+            Timestamp = ((DateTimeOffset)DateTime.Today).ToUnixTimeSeconds();
+        }
+    }
+
+    struct UserId
+    {
+        private readonly ulong LowBytes;
+        private readonly ulong HighBytes;
+
+        public UserId(string UserIdHex)
+        {
+            if (UserIdHex == null || UserIdHex.Length != 32 || !UserIdHex.All("0123456789abcdefABCDEF".Contains))
+            {
+                throw new ArgumentException("UserId is not a valid Hex string", "UserIdHex");
+            }
+
+            byte[] HexBytes = StringUtils.HexToBytes(UserIdHex);
+
+            LowBytes = BitConverter.ToUInt64(HexBytes, 8);
+
+            Array.Resize(ref HexBytes, 8);
+
+            HighBytes = BitConverter.ToUInt64(HexBytes, 0);
+        }
+
+        public byte[] ToBytes()
+        {
+            return BitConverter.GetBytes(HighBytes).Concat(BitConverter.GetBytes(LowBytes)).ToArray();
+        }
+
+        public override string ToString()
+        {
+            return BitConverter.ToString(ToBytes()).ToLower().Replace("-", string.Empty);
+        }
+    }
+}