Implements panic bunkering.

Content.Server.Database/Model.cs

@@ -454,6 +454,7 @@ public enum ConnectionDenyReason : byte
         Ban = 0,
         Whitelist = 1,
         Full = 2,
+        Panic = 3,
     }
 
     public class ServerBanHit

Content.Server/Administration/Commands/PanicBunkerCommand.cs

@@ -0,0 +1,32 @@
+using Content.Shared.Administration;
+using Content.Shared.CCVar;
+using Robust.Shared.Configuration;
+using Robust.Shared.Console;
+
+namespace Content.Server.Administration.Commands;
+
+[AdminCommand(AdminFlags.Server)]
+public sealed class PanicBunkerCommand : IConsoleCommand
+{
+    [Dependency] private readonly IConfigurationManager _cfg = default!;
+
+    public string Command => "panicbunker";
+    public string Description => "Enables or disables the panic bunker functionality.";
+    public string Help => "panicbunker <enabled>";
+    public void Execute(IConsoleShell shell, string argStr, string[] args)
+    {
+        if (args.Length != 1)
+        {
+            shell.WriteError(Loc.GetString("shell-wrong-arguments-number"));
+            return;
+        }
+
+        if (!bool.TryParse(args[0], out var enabled))
+        {
+            shell.WriteError(Loc.GetString("shell-invalid-bool"));
+            return;
+        }
+
+        _cfg.SetCVar(CCVars.PanicBunkerEnabled, enabled);
+    }
+}

Content.Server/Connection/ConnectionManager.cs

@@ -101,6 +101,19 @@ private async Task NetMgrOnConnecting(NetConnectingArgs e)
             }
 
             var adminData = await _dbManager.GetAdminDataForAsync(e.UserId);
+
+            if (_cfg.GetCVar(CCVars.PanicBunkerEnabled))
+            {
+                var record = await _dbManager.GetPlayerRecordByUserId(userId);
+                if ((record is null ||
+                    record.FirstSeenTime.CompareTo(DateTimeOffset.Now - TimeSpan.FromMinutes(_cfg.GetCVar(CCVars.PanicBunkerMinAccountAge))) < 0)
+                    && !await _db.GetWhitelistStatusAsync(userId)
+                    )
+                {
+                    return (ConnectionDenyReason.Panic, Loc.GetString("panic-bunker-account-denied"), null);
+                }
+            }
+
             var wasInGame = EntitySystem.TryGet<GameTicker>(out var ticker) && ticker.PlayersInGame.Contains(userId);
             if ((_plyMgr.PlayerCount >= _cfg.GetCVar(CCVars.SoftMaxPlayers) && adminData is null) && !wasInGame)
             {

Content.Shared/CCVar/CCVars.cs

@@ -206,6 +206,18 @@ public static readonly CVarDef<bool>
         public static readonly CVarDef<int> SoftMaxPlayers =
             CVarDef.Create("game.soft_max_players", 30, CVar.SERVERONLY | CVar.ARCHIVE);
 
+        /// <summary>
+        /// Whether or not panic bunker is currently enabled.
+        /// </summary>
+        public static readonly CVarDef<bool> PanicBunkerEnabled =
+            CVarDef.Create("game.panic_bunker.enabled", false, CVar.SERVERONLY);
+
+        /// <summary>
+        /// Minimum age of the account (from server's PoV, so from first-seen date) in minutes.
+        /// </summary>
+        public static readonly CVarDef<int> PanicBunkerMinAccountAge =
+            CVarDef.Create("game.panic_bunker.min_account_age", 1440, CVar.SERVERONLY);
+
 #if EXCEPTION_TOLERANCE
         /// <summary>
         ///     Amount of times round start must fail before the server is shut down.

Resources/Locale/en-US/connection-messages.ftl

@@ -10,3 +10,4 @@ command-kicknonwhitelisted-description = Kicks all non-whitelisted players from
 command-kicknonwhitelisted-help = kicknonwhitelisted
 
 soft-player-cap-full = The server is full!
+panic-bunker-account-denied = This server is in Panic mode and you were rejected. Contact the server administrator for help.

Resources/Locale/en-US/shell.ftl

@@ -24,6 +24,7 @@ shell-invalid-entity-id = Invalid entity ID.
 shell-invalid-grid-id = Invalid grid ID.
 shell-invalid-map-id = Invalid map ID.
 shell-invalid-entity-uid = {$uid} is not a valid entity uid
+shell-invalid-bool = Invalid boolean.
 shell-entity-uid-must-be-number = EntityUid must be a number.
 shell-could-not-find-entity = Could not find entity {$entity}
 shell-could-not-find-entity-with-uid = Could not find entity with uid {$uid}