first commit

NitroxServer/ConsoleCommands/ListCommand.cs

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+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using NitroxModel.DataStructures.GameLogic;
+using NitroxModel.Serialization;
+using NitroxServer.ConsoleCommands.Abstract;
+using NitroxServer.GameLogic;
+
+namespace NitroxServer.ConsoleCommands
+{
+    internal class ListCommand : Command
+    {
+        private readonly PlayerManager playerManager;
+        private readonly SubnauticaServerConfig serverConfig;
+
+        public ListCommand(SubnauticaServerConfig serverConfig, PlayerManager playerManager) : base("list", Perms.PLAYER, "Shows who's online")
+        {
+            this.playerManager = playerManager;
+            this.serverConfig = serverConfig;
+        }
+
+        protected override void Execute(CallArgs args)
+        {
+            IList<string> players = playerManager.GetConnectedPlayers().Select(player => player.Name).ToList();
+
+            StringBuilder builder = new($"List of players ({players.Count}/{serverConfig.MaxConnections}):\n");
+            builder.Append(string.Join(", ", players));
+
+            SendMessage(args.Sender, builder.ToString());
+        }
+    }
+}