Reorganizing module and submodule folders

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

@@ -0,0 +1,65 @@
+#nullable disable
+namespace NadekoBot.Modules.Gambling.Common;
+
+public class CurrencyRaffleGame
+{
+    public enum Type
+    {
+        Mixed,
+        Normal
+    }
+
+    public IEnumerable<User> Users
+        => _users;
+
+    public Type GameType { get; }
+
+    private readonly HashSet<User> _users = new();
+
+    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() { 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)];
+    }
+
+    public class User
+    {
+        public IUser DiscordUser { get; set; }
+        public long Amount { get; set; }
+
+        public override int GetHashCode()
+            => DiscordUser.GetHashCode();
+
+        public override bool Equals(object obj)
+            => obj is User u ? u.DiscordUser == DiscordUser : false;
+    }
+}