Feature: Whitelist overhaul

TShockAPI/Commands.cs

@@ -1742,13 +1742,20 @@ void BanDetails()
 
 		private static void Whitelist(CommandArgs args)
 		{
-			if (args.Parameters.Count == 1)
+			if (args.Parameters is [{ } ip])
 			{
-				using (var tw = new StreamWriter(FileTools.WhitelistPath, true))
+				if (TShock.Whitelist.AddToWhitelist(ip))
+				{
+					args.Player.SendSuccessMessage(GetString($"Added {ip} to the whitelist."));
+				}
+				else
 				{
-					tw.WriteLine(args.Parameters[0]);
+					args.Player.SendErrorMessage(GetString($"Failed to add {ip} to the whitelist. Perhaps it is already whitelisted?"));
 				}
-				args.Player.SendSuccessMessage(GetString($"Added {args.Parameters[0]} to the whitelist."));
+			}
+			else
+			{
+				args.Player.SendErrorMessage(GetString($"Invalid Whitelist syntax. Refer to {Specifier}whitelist help for details on how to use the {Specifier}whitelist command"));
 			}
 		}
 

TShockAPI/FileTools.cs

@@ -49,10 +49,7 @@ internal static string MotdPath
 		/// <summary>
 		/// Path to the file containing the whitelist.
 		/// </summary>
-		internal static string WhitelistPath
-		{
-			get { return Path.Combine(TShock.SavePath, "whitelist.txt"); }
-		}
+		internal static string WhitelistPath => Path.Combine(TShock.SavePath, "whitelist.txt");
 
 		/// <summary>
 		/// Path to the file containing the config.
@@ -104,8 +101,8 @@ public static void SetupConfig()
 
 			CreateIfNot(RulesPath, "Respect the admins!\nDon't use TNT!");
 			CreateIfNot(MotdPath, MotdFormat);
-						
-			CreateIfNot(WhitelistPath);
+
+			CreateIfNot(WhitelistPath, Whitelist.DefaultWhitelistContent);
 			bool writeConfig = true; // Default to true if the file doesn't exist
 			if (File.Exists(ConfigPath))
 			{
@@ -140,39 +137,6 @@ public static void SetupConfig()
 			}
 		}
 
-		/// <summary>
-		/// Tells if a user is on the whitelist
-		/// </summary>
-		/// <param name="ip">string ip of the user</param>
-		/// <returns>true/false</returns>
-		public static bool OnWhitelist(string ip)
-		{
-			if (!TShock.Config.Settings.EnableWhitelist)
-			{
-				return true;
-			}
-			CreateIfNot(WhitelistPath, "127.0.0.1");
-			using (var tr = new StreamReader(WhitelistPath))
-			{
-				string whitelist = tr.ReadToEnd();
-				ip = TShock.Utils.GetRealIP(ip);
-				bool contains = whitelist.Contains(ip);
-				if (!contains)
-				{
-					foreach (var line in whitelist.Split(Environment.NewLine.ToCharArray()))
-					{
-						if (string.IsNullOrWhiteSpace(line))
-							continue;
-						contains = TShock.Utils.GetIPv4AddressFromHostname(line).Equals(ip);
-						if (contains)
-							return true;
-					}
-					return false;
-				}
-				return true;
-			}
-		}
-
 		/// <summary>
 		/// Looks for a 'Settings' token in the json object. If one is not found, returns a new json object with all tokens of the previous object added
 		/// as children to a root 'Settings' token

TShockAPI/TShock.cs

@@ -128,6 +128,12 @@ public class TShock : TerrariaPlugin
 		public static ILog Log;
 		/// <summary>instance - Static reference to the TerrariaPlugin instance.</summary>
 		public static TerrariaPlugin instance;
+
+		/// <summary>
+		/// Whitelist - Static reference to the whitelist system, which allows whitelisting of IP addresses and networks.
+		/// </summary>
+		public static Whitelist Whitelist { get; set; }
+
 		/// <summary>
 		/// Static reference to a <see cref="CommandLineParser"/> used for simple command-line parsing
 		/// </summary>
@@ -354,6 +360,7 @@ public override void Initialize()
 				Bouncer = new Bouncer();
 				RegionSystem = new RegionHandler(Regions);
 				ItemBans = new ItemBans(this, DB);
+				Whitelist = new(FileTools.WhitelistPath);
 
 				var geoippath = "GeoIP.dat";
 				if (Config.Settings.EnableGeoIP && File.Exists(geoippath))
@@ -1317,7 +1324,7 @@ private void OnConnect(ConnectEventArgs args)
 				return;
 			}
 
-			if (!FileTools.OnWhitelist(player.IP))
+			if (!Whitelist.IsWhitelisted(player.IP))
 			{
 				player.Kick(Config.Settings.WhitelistKickReason, true, true, null, false);
 				args.Handled = true;

TShockAPI/Utils.cs

@@ -1,4 +1,4 @@
-/*
+/*
 TShock, a server mod for Terraria
 Copyright (C) 2011-2019 Pryaxis & TShock Contributors
 
@@ -608,6 +608,7 @@ public void Reload()
 			TShock.ProjectileBans.UpdateBans();
 			TShock.TileBans.UpdateBans();
 			TShock.Bans.UpdateBans();
+			TShock.Whitelist.ReloadFromFile();
 		}
 
 		/// <summary>