Restructured folders and project names, ci should be fixed

src/NadekoBot/Modules/Gambling/Common/CurrencyRaffleGame.cs

@@ -0,0 +1,81 @@
+using Discord;
+using NadekoBot.Common;
+using System.Collections.Generic;
+using System.Linq;
+
+namespace NadekoBot.Core.Modules.Gambling.Common
+{
+    public class CurrencyRaffleGame
+    {
+        public enum Type {
+            Mixed,
+            Normal
+        }
+
+        public class User
+        {
+            public IUser DiscordUser { get; set; }
+            public long Amount { get; set; }
+
+            public override int GetHashCode()
+            {
+                return DiscordUser.GetHashCode();
+            }
+
+            public override bool Equals(object obj)
+            {
+                return obj is User u
+                    ? u.DiscordUser == DiscordUser
+                    : false;
+            }
+        }
+
+        private readonly HashSet<User> _users = new HashSet<User>();
+        public IEnumerable<User> Users => _users;
+        public Type GameType { get; }
+
+        public CurrencyRaffleGame(Type type)
+        {
+            GameType = type;
+        }
+
+        public bool AddUser(IUser usr, long amount)
+        {
+            // if game type is normal, and someone already joined the game 
+            // (that's the user who created it)
+            if (GameType == Type.Normal && _users.Count > 0 &&
+                _users.First().Amount != amount)
+                return false;
+
+            if (!_users.Add(new User
+            {
+                DiscordUser = usr,
+                Amount = amount,
+            }))
+            {
+                return false;
+            }
+            
+            return true;
+        }
+
+        public User GetWinner()
+        {
+            var rng = new NadekoRandom();
+            if (GameType == Type.Mixed)
+            {
+                var num = rng.NextLong(0L, Users.Sum(x => x.Amount));
+                var sum = 0L;
+                foreach (var u in Users)
+                {
+                    sum += u.Amount;
+                    if (sum > num)
+                        return u;
+                }
+            }
+
+            var usrs = _users.ToArray();
+            return usrs[rng.Next(0, usrs.Length)];
+        }
+    }
+}