Added validators for voice id & voice name

Validators/IValidator.cs

@@ -0,0 +1,7 @@
+namespace HermesSocketServer.Validators
+{
+    public interface IValidator
+    {
+        bool Check(string? input);
+    }
+}

Validators/RegexValidator.cs

@@ -0,0 +1,29 @@
+using System.Text.RegularExpressions;
+
+namespace HermesSocketServer.Validators
+{
+    public class RegexValidator : IValidator
+    {
+        private readonly Regex _regex;
+        private readonly int _minimum;
+        private readonly int _maximum;
+
+        public RegexValidator(string regex, RegexOptions options, int minimum, int maximum) {
+            _regex = new Regex(regex, options | RegexOptions.Compiled);
+            _minimum = minimum;
+            _maximum = maximum;
+        }
+
+        public bool Check(string? input)
+        {
+            if (input == null)
+                throw new ArgumentNullException(nameof(input));
+            if (input.Length < _minimum)
+                throw new ArgumentException("Too short. Must be of length 8 or greater.", nameof(input));
+            if (input.Length > _maximum)
+                throw new ArgumentException("Too long. Must be of length 24 or less.", nameof(input));
+            
+            return _regex.IsMatch(input);
+        }
+    }
+}

Validators/VoiceIdValidator.cs

@@ -0,0 +1,10 @@
+using System.Text.RegularExpressions;
+
+namespace HermesSocketServer.Validators
+{
+    public class VoiceIdValidator : RegexValidator
+    {
+        public VoiceIdValidator()
+            : base("^[a-z0-9]{25}$", RegexOptions.IgnoreCase, 25, 25) { }
+    }
+}

Validators/VoiceNameValidator.cs

@@ -0,0 +1,10 @@
+using System.Text.RegularExpressions;
+
+namespace HermesSocketServer.Validators
+{
+    public class VoiceNameValidator : RegexValidator
+    {
+        public VoiceNameValidator()
+            : base("^[a-z0-9_\\-]{2,32}$", RegexOptions.IgnoreCase, 2, 32) { }
+    }
+}