Radicade Public Code

Server/Players/UsernameRules.cs

@@ -0,0 +1,65 @@
+namespace RadicadeServer.Utils
+{
+		public static class UsernameRules
+	{
+		public const int MinLength = 3;
+		public const int MaxLength = 24;
+
+				private static readonly string[] ReservedNames =
+		[
+			"me", "you", "recroom", "recnet", "radicade", "againstgravity",
+			"system", "admin", "administrator", "moderator", "mod", "support",
+			"staff", "official", "developer", "owner", "root"
+		];
+
+				public static string? Normalize(string? posted)
+		{
+			if (string.IsNullOrWhiteSpace(posted)) return null;
+
+			var name = posted.Trim().TrimStart('@').Trim();
+			return name.Length == 0 ? null : name;
+		}
+
+				public static string? Parse(string? posted, out string? rejection)
+		{
+			rejection = null;
+
+			var name = Normalize(posted);
+			if (name == null) return null;
+
+			rejection = Rejection(name);
+			return rejection == null ? name : null;
+		}
+
+				public static string? Rejection(string name)
+		{
+			if (name.Length < MinLength)
+				return $"Names must be at least {MinLength} characters.";
+			if (name.Length > MaxLength)
+				return $"Names must be {MaxLength} characters or fewer.";
+
+			bool hasLetter = false;
+			foreach (var character in name)
+			{
+				if (char.IsAsciiLetter(character)) { hasLetter = true; continue; }
+				if (char.IsAsciiDigit(character)) continue;
+				return "Names can only use letters and numbers.";
+			}
+
+			if (!hasLetter)
+				return "Names must contain at least one letter.";
+
+			if (ReservedNames.Any(reserved => string.Equals(reserved, name, StringComparison.OrdinalIgnoreCase)))
+				return "That name is reserved. Please pick another one.";
+
+			if (!name.IsPure())
+				return "That name is not allowed. Please pick another one.";
+
+			return null;
+		}
+
+				public static string ComparisonKey(string name) => name.ToUpperInvariant();
+
+				public static string Generate() => RecNet.Generators.GenerateUsername();
+	}
+}