Add IMessageCapturer implementations

Hcs.Client/Client/MessageCapturer/FileMessageCapturer.cs

@@ -0,0 +1,39 @@
+using Hcs.Client.Logger;
+using System.Text;
+
+namespace Hcs.Client.MessageCapturer
+{
+    public class FileMessageCapturer(string directory, ILogger logger) : IMessageCapturer
+    {
+        private readonly string directory = directory;
+        private readonly ILogger logger = logger;
+
+        public void CaptureMessage(bool sent, string messageBody)
+        {
+            var index = 0;
+            var maxIndex = 1000000;
+            string fileName;
+            do
+            {
+                index += 1;
+
+                if (index > maxIndex)
+                {
+                    throw new System.Exception("index value exceeds maxIndex value");
+                }
+
+                fileName = index.ToString("D3") + "_" + (sent ? "message" : "response") + ".xml";
+
+                if (!string.IsNullOrEmpty(directory))
+                {
+                    fileName = System.IO.Path.Combine(directory, fileName);
+                }
+            }
+            while (System.IO.File.Exists(fileName));
+
+            logger?.WriteLine($"Capturing message to file {fileName}...");
+
+            System.IO.File.WriteAllText(fileName, messageBody, Encoding.UTF8);
+        }
+    }
+}