Restrict character names to alphanumerics via cvar (#4947)

* Restrict character names to ASCII via cvar

* Alphanumerics is better

* name randomization

Co-authored-by: ike709 <ike709@github.com>

Content.Shared/CCVar/CCVars.cs

@@ -461,5 +461,15 @@ namespace Content.Shared.CCVar
         /// </summary>
         public static readonly CVarDef<float> AfkTime =
             CVarDef.Create("afk.time", 60f, CVar.SERVERONLY);
+
+        /*
+         * IC
+         */
+
+        /// <summary>
+        /// Restricts IC character names to alphanumeric chars.
+        /// </summary>
+        public static readonly CVarDef<bool> RestrictedNames =
+            CVarDef.Create("ic.restricted_names", true, CVar.SERVER | CVar.REPLICATED);
     }
 }

Content.Shared/Preferences/HumanoidCharacterProfile.cs

@@ -1,11 +1,14 @@
 using System;
 using System.Collections.Generic;
 using System.Linq;
+using System.Text.RegularExpressions;
+using Content.Shared.CCVar;
 using Content.Shared.CharacterAppearance;
 using Content.Shared.Dataset;
 using Content.Shared.GameTicking;
 using Content.Shared.Random.Helpers;
 using Content.Shared.Roles;
+using Robust.Shared.Configuration;
 using Robust.Shared.Enums;
 using Robust.Shared.IoC;
 using Robust.Shared.Localization;
@@ -261,7 +264,7 @@ namespace Content.Shared.Preferences
             string name;
             if (string.IsNullOrEmpty(Name))
             {
-                name = "Urist McHands";
+                name = RandomName();
             }
             else if (Name.Length > MaxNameLength)
             {
@@ -272,12 +275,18 @@ namespace Content.Shared.Preferences
                 name = Name;
             }
 
-            // TODO: Avoid Z̨͇̙͉͎̭͔̼̿͋A͚̖̞̗̞͈̓̾̀ͩͩ̔L̟ͮ̈͝G̙O͍͎̗̺̺ͫ̀̽͊̓͝ͅ tier shenanigans.
-            // And other stuff like RTL overrides and such.
-            // Probably also emojis...
-
             name = name.Trim();
 
+            if (IoCManager.Resolve<IConfigurationManager>().GetCVar(CCVars.RestrictedNames))
+            {
+                name = Regex.Replace(name, @"[^A-Z,a-z,0-9, -]", string.Empty);
+            }
+
+            if (string.IsNullOrEmpty(name))
+            {
+                name = RandomName();
+            }
+
             var appearance = HumanoidCharacterAppearance.EnsureValid(Appearance);
 
             var prefsUnavailableMode = PreferenceUnavailable switch
@@ -337,6 +346,16 @@ namespace Content.Shared.Preferences
 
             _antagPreferences.Clear();
             _antagPreferences.AddRange(antags);
+
+            string RandomName()
+            {
+                if (Sex == null) return "Urist McHands"; // This shouldn't happen
+                var random = IoCManager.Resolve<IRobustRandom>();
+                var protoMan = IoCManager.Resolve<IPrototypeManager>();
+                var firstName = random.Pick(Sex.FirstNames(protoMan).Values);
+                var lastName = random.Pick(protoMan.Index<DatasetPrototype>("names_last"));
+                return $"{firstName} {lastName}";
+            }
         }
 
         public override bool Equals(object? obj)