Initial split of the modules

NadekoBot.Modules.Xp/Extensions/Extensions.cs

@@ -0,0 +1,34 @@
+using NadekoBot.Modules.Xp.Services;
+using NadekoBot.Services.Database.Models;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace NadekoBot.Modules.Xp.Extensions
+{
+    public static class Extensions
+    {
+        public static (int Level, int LevelXp, int LevelRequiredXp) GetLevelData(this UserXpStats stats)
+        {
+            var baseXp = XpService.XP_REQUIRED_LVL_1;
+            
+            var required = baseXp;
+            var totalXp = 0;
+            var lvl = 1;
+            while (true)
+            {
+                required = (int)(baseXp + baseXp / 4.0 * (lvl - 1));
+
+                if (required + totalXp > stats.Xp)
+                    break;
+
+                totalXp += required;
+                lvl++;
+            }
+
+            return (lvl - 1, stats.Xp - totalXp, required);
+        }
+    }
+}