Added extensions

EonaCat.Logger/EonaCatCoreLogger/Extensions/FileLoggerFactoryExtensions.cs

@@ -60,6 +60,7 @@ public static class FileLoggerFactoryExtensions
                 options.Mask = fileLoggerOptions.Mask;
                 options.UseDefaultMasking = fileLoggerOptions.UseDefaultMasking;
                 options.MaskedKeywords = fileLoggerOptions.MaskedKeywords;
+                options.IncludeCorrelationId = fileLoggerOptions.IncludeCorrelationId;
             }
         );
         return builder;

EonaCat.Logger/EonaCatCoreLogger/FileLoggerProvider.cs

@@ -24,7 +24,7 @@ public sealed class FileLoggerProvider : BatchingLoggerProvider
 
     private string _logFile;
     private long _currentFileSize;
-
+    private Timer _flushTimer;
     private readonly ConcurrentDictionary<string, StringBuilder> _buffers = new();
     private readonly ConcurrentDictionary<string, long> _fileSizes = new();
     private readonly SemaphoreSlim _writeLock = new(1, 1);
@@ -35,6 +35,7 @@ public sealed class FileLoggerProvider : BatchingLoggerProvider
     public string LogFile => _logFile ?? string.Empty;
 
     public event EventHandler<ErrorMessage> OnError;
+    public event EventHandler<string> OnRollOver;
 
     public FileLoggerProvider(IOptions<FileLoggerOptions> options) : base(options)
     {
@@ -48,6 +49,15 @@ public sealed class FileLoggerProvider : BatchingLoggerProvider
 
         Directory.CreateDirectory(_path);
         InitializeCurrentFile();
+        _flushTimer = new Timer(_ => FlushAllAsync().GetAwaiter().GetResult(), null, 5000, 5000);
+    }
+
+    private async Task FlushAllAsync()
+    {
+        foreach (var kv in _buffers)
+        {
+            await FlushAsync(kv.Key, kv.Value, CancellationToken.None);
+        }
     }
 
     public bool IncludeCorrelationId { get; }
@@ -179,17 +189,17 @@ public sealed class FileLoggerProvider : BatchingLoggerProvider
 
             for (int i = _maxRolloverFiles - 1; i >= 1; i--)
             {
-                var src = Path.Combine(dir, $"{name}.{i}{ext}");
+                var source = Path.Combine(dir, $"{name}.{i}{ext}");
-                var dst = Path.Combine(dir, $"{name}.{i + 1}{ext}");
+                var destination = Path.Combine(dir, $"{name}.{i + 1}{ext}");
 
-                if (File.Exists(dst))
+                if (File.Exists(destination))
                 {
-                    File.Delete(dst);
+                    File.Delete(destination);
                 }
 
-                if (File.Exists(src))
+                if (File.Exists(source))
                 {
-                    File.Move(src, dst);
+                    File.Move(source, destination);
                 }
             }
 
@@ -204,6 +214,7 @@ public sealed class FileLoggerProvider : BatchingLoggerProvider
         finally
         {
             _rolloverLock.Release();
+            OnRollOver?.Invoke(this, file);
         }
     }
 
@@ -213,13 +224,10 @@ public sealed class FileLoggerProvider : BatchingLoggerProvider
         _buffers.TryAdd(file, new StringBuilder(4096));
     }
 
-    private (int Year, int Month, int Day) GetGrouping(LogMessage m) =>
-        (m.Timestamp.Year, m.Timestamp.Month, m.Timestamp.Day);
-
     private string GetFullName((int Year, int Month, int Day) g) =>
         string.IsNullOrWhiteSpace(_fileNamePrefix)
-            ? Path.Combine(_path, $"{g.Year:0000}{g.Month:00}{g.Day:00}.log")
+            ? Path.Combine(_path, $"{Environment.MachineName}_{g.Year:0000}{g.Month:00}{g.Day:00}.log")
-            : Path.Combine(_path, $"{_fileNamePrefix}_{g.Year:0000}{g.Month:00}{g.Day:00}.log");
+            : Path.Combine(_path, $"{_fileNamePrefix}_{Environment.MachineName}_{g.Year:0000}{g.Month:00}{g.Day:00}.log");
 
     private void DeleteOldLogFiles()
     {

EonaCat.Logger/EonaCatCoreLogger/TcpLogger.cs

@@ -19,10 +19,12 @@ namespace EonaCat.Logger.EonaCatCoreLogger
         private readonly CancellationTokenSource _cts = new();
         private readonly Task _processingTask;
 
-        private const int MaxQueueSize = 1000;
+        private const int MaxQueueSize = 5000;
+        private const int MaxBatchSize = 20; // send logs in batches to reduce TCP writes
 
         public bool IncludeCorrelationId { get; set; }
         public event EventHandler<Exception> OnException;
+        public event EventHandler<string> OnLogDropped;
 
         public TcpLogger(string categoryName, TcpLoggerOptions options)
         {
@@ -37,6 +39,7 @@ namespace EonaCat.Logger.EonaCatCoreLogger
                 SingleWriter = false
             });
 
+            // Start background processing task
             _processingTask = Task.Run(() => ProcessLogQueueAsync(_cts.Token), _cts.Token);
         }
 
@@ -51,9 +54,7 @@ namespace EonaCat.Logger.EonaCatCoreLogger
             Exception exception, Func<TState, Exception, string> formatter)
         {
             if (!IsEnabled(logLevel) || formatter == null)
-            {
                 return;
-            }
 
             try
             {
@@ -65,7 +66,6 @@ namespace EonaCat.Logger.EonaCatCoreLogger
 
                 string message = formatter(state, exception);
 
-                // Build message
                 var sb = new StringBuilder(256);
                 sb.Append('[').Append(DateTime.UtcNow.ToString("u")).Append("] | ");
                 sb.Append('[').Append(logLevel).Append("] | ");
@@ -77,17 +77,14 @@ namespace EonaCat.Logger.EonaCatCoreLogger
                 {
                     sb.Append(" | Context: ");
                     foreach (var kvp in contextData)
-                    {
                         sb.Append(kvp.Key).Append("=").Append(kvp.Value).Append("; ");
-                    }
                 }
 
                 if (exception != null)
-                {
                     sb.Append(" | Exception: ").Append(exception);
-                }
 
-                _logChannel.Writer.TryWrite(sb.ToString());
+                if (!_logChannel.Writer.TryWrite(sb.ToString()))
+                    OnLogDropped?.Invoke(this, sb.ToString()); // notify if log is dropped
             }
             catch (Exception ex)
             {
@@ -100,51 +97,146 @@ namespace EonaCat.Logger.EonaCatCoreLogger
             TcpClient client = null;
             StreamWriter writer = null;
 
-            try
+            while (!token.IsCancellationRequested)
             {
-                client = new TcpClient();
+                try
-                await client.ConnectAsync(_options.Host, _options.Port).ConfigureAwait(false);
-
-                writer = new StreamWriter(client.GetStream(), Encoding.UTF8) { AutoFlush = true };
-
-                await foreach (var log in _logChannel.Reader.ReadAllAsync(token))
                 {
-                    try
+                    // Attempt to connect with exponential backoff
+                    int attempt = 0;
+                    while (client == null || !client.Connected)
                     {
-                        await writer.WriteLineAsync(log).ConfigureAwait(false);
+                        try
+                        {
+                            client?.Dispose();
+                            client = new TcpClient();
+                            await ConnectWithRetryAsync(client, _options.Host, _options.Port, token);
+                            writer = new StreamWriter(client.GetStream(), Encoding.UTF8) { AutoFlush = true };
+                            break; // connected
+                        }
+                        catch (Exception ex)
+                        {
+                            OnException?.Invoke(this, ex);
+                            attempt++;
+                            int delay = Math.Min(1000 * (int)Math.Pow(2, attempt), 30000); // max 30s backoff
+                            await Task.Delay(delay, token).ConfigureAwait(false);
+                        }
                     }
-                    catch (IOException ioEx)
-                    {
-                        OnException?.Invoke(this, ioEx);
 
-                        // Attempt to reconnect
+                    // Process logs in batches
-                        writer.Dispose();
+                    var batch = new List<string>(MaxBatchSize);
-                        client.Dispose();
+                    await foreach (var log in _logChannel.Reader.ReadAllAsync(token))
-                        client = new TcpClient();
-                        await client.ConnectAsync(_options.Host, _options.Port).ConfigureAwait(false);
-                        writer = new StreamWriter(client.GetStream(), Encoding.UTF8) { AutoFlush = true };
-                    }
-                    catch (Exception ex)
                     {
-                        OnException?.Invoke(this, ex);
+                        batch.Add(log);
+                        if (batch.Count >= MaxBatchSize)
+                        {
+                            await SafeWriteBatch(writer, batch, client, token);
+                            batch.Clear();
+                        }
                     }
+
+                    // Flush any remaining logs
+                    if (batch.Count > 0)
+                        await SafeWriteBatch(writer, batch, client, token);
+                }
+                catch (OperationCanceledException)
+                {
+                    break; // normal shutdown
+                }
+                catch (Exception ex)
+                {
+                    OnException?.Invoke(this, ex);
+                    await Task.Delay(1000, token); // prevent tight loop
                 }
             }
-            catch (OperationCanceledException) 
+
+            // Cleanup
+            writer?.Dispose();
+            client?.Dispose();
+        }
+
+        private async Task ConnectWithRetryAsync(TcpClient client, string host, int port, CancellationToken token)
+        {
+            int attempt = 0;
+
+            while (!token.IsCancellationRequested)
             {
-                // normal shutdown
+                try
+                {
+                    var connectTask = client.ConnectAsync(host, port);
+                    var delayTask = Task.Delay(Timeout.Infinite, token);
+
+                    var completed = await Task.WhenAny(connectTask, delayTask);
+                    if (completed == connectTask)
+                    {
+                        await connectTask;
+                        return;
+                    }
+                    else
+                    {
+                        token.ThrowIfCancellationRequested();
+                    }
+                }
+                catch (Exception ex)
+                {
+                    attempt++;
+                    OnException?.Invoke(this, ex);
+                    int delayMs = Math.Min(1000 * (int)Math.Pow(2, attempt), 30000);
+                    await Task.Delay(delayMs, token);
+                    client.Dispose();
+                    client = new TcpClient();
+                }
+            }
+        }
+
+        private async Task SafeWriteBatch(StreamWriter writer, List<string> batch, TcpClient client, CancellationToken token)
+        {
+            try
+            {
+                if (writer != null && client?.Connected == true)
+                {
+                    await writer.WriteLineAsync(string.Join(Environment.NewLine, batch)).ConfigureAwait(false);
+                }
+                else
+                {
+                    // Optionally write to local file if TCP server is down
+                    await FallbackWriteAsync(batch).ConfigureAwait(false);
+                }
             }
             catch (Exception ex)
             {
                 OnException?.Invoke(this, ex);
-            }
+                await FallbackWriteAsync(batch).ConfigureAwait(false);
-            finally
-            {
-                writer?.Dispose();
-                client?.Dispose();
             }
         }
 
+        private async Task FallbackWriteAsync(List<string> batch)
+        {
+            try
+            {
+                if (!_options.EnableFallbackLogging)
+                {
+                    return;
+                }
+
+                string fallbackFile = _options.FallbackLogFilePath ?? Path.Combine(AppContext.BaseDirectory, "tcp_logger_fallback.log");
+
+                Directory.CreateDirectory(Path.GetDirectoryName(fallbackFile)!);
+
+                using (var writer = new StreamWriter(fallbackFile, append: true, encoding: Encoding.UTF8))
+                {
+                    foreach (var line in batch)
+                    {
+                        await writer.WriteLineAsync(line).ConfigureAwait(false);
+                    }
+                }
+            }
+            catch
+            {
+               // Do nothing
+            }
+        }
+
+
         public void Dispose()
         {
             _cts.Cancel();
@@ -152,7 +244,7 @@ namespace EonaCat.Logger.EonaCatCoreLogger
 
             try
             {
-                _processingTask.Wait(); 
+                _processingTask.Wait(TimeSpan.FromSeconds(5));
             }
             catch 
             {

EonaCat.Logger/EonaCatCoreLogger/TcpLoggerOptions.cs

@@ -13,5 +13,7 @@ namespace EonaCat.Logger.EonaCatCoreLogger
         public int Port { get; set; }
         public bool IsEnabled { get; set; } = true;
         public bool IncludeCorrelationId { get; set; }
+        public string FallbackLogFilePath { get; set; }
+        public bool EnableFallbackLogging { get; set; }
     }
 }

EonaCat.Logger/EonaCatCoreLogger/UdpLogger.cs

@@ -23,7 +23,9 @@ namespace EonaCat.Logger.EonaCatCoreLogger
         private readonly Task _processingTask;
 
         public bool IncludeCorrelationId { get; set; }
+        
         public event EventHandler<Exception> OnException;
+        public event EventHandler<string> OnLogDropped;
 
         public UdpLogger(string categoryName, UdpLoggerOptions options)
         {
@@ -93,7 +95,10 @@ namespace EonaCat.Logger.EonaCatCoreLogger
                 string fullMessage = string.Join(" | ", logParts);
 
                 // Drop oldest if full
-                _logChannel.Writer.TryWrite(fullMessage);
+                if (!_logChannel.Writer.TryWrite(fullMessage))
+                {
+                    OnLogDropped?.Invoke(this, fullMessage);
+                }
             }
             catch (Exception ex)
             {
@@ -105,16 +110,42 @@ namespace EonaCat.Logger.EonaCatCoreLogger
         {
             try
             {
-                await foreach (var message in _logChannel.Reader.ReadAllAsync(token))
+                if (_options.EnableBatching && _options.BatchSize > 1)
                 {
-                    try
+                    // batching mode
+                    var batch = new List<string>(_options.BatchSize);
+
+                    await foreach (var message in _logChannel.Reader.ReadAllAsync(token))
                     {
-                        byte[] bytes = Encoding.UTF8.GetBytes(message);
+                        batch.Add(message);
-                        await _udpClient.SendAsync(bytes, bytes.Length, _options.Host, _options.Port);
+
+                        if (batch.Count >= _options.BatchSize)
+                        {
+                            await SendBatchAsync(batch, token);
+                            batch.Clear();
+                        }
                     }
-                    catch (Exception ex)
+
+                    // send remaining messages
+                    if (batch.Count > 0)
                     {
-                        OnException?.Invoke(this, ex);
+                        await SendBatchAsync(batch, token);
+                    }
+                }
+                else
+                {
+                    // non-batching mode: send messages one by one
+                    await foreach (var message in _logChannel.Reader.ReadAllAsync(token))
+                    {
+                        try
+                        {
+                            byte[] bytes = Encoding.UTF8.GetBytes(message);
+                            await _udpClient.SendAsync(bytes, bytes.Length, _options.Host, _options.Port);
+                        }
+                        catch (Exception ex)
+                        {
+                            OnException?.Invoke(this, ex);
+                        }
                     }
                 }
             }
@@ -122,6 +153,30 @@ namespace EonaCat.Logger.EonaCatCoreLogger
             {
                 // normal shutdown
             }
+            catch (Exception exception)
+            {
+                OnException?.Invoke(this, exception);
+            }
+        }
+
+        /// <summary>
+        /// Sends a batch of log messages as a single UDP packet.
+        /// </summary>
+        private async Task SendBatchAsync(List<string> batch, CancellationToken token)
+        {
+            try
+            {
+                string combinedMessage = string.Join(Environment.NewLine, batch);
+
+                const int maxUdpSize = 60_000;
+                if (combinedMessage.Length > maxUdpSize)
+                {
+                    combinedMessage = combinedMessage.Substring(0, maxUdpSize);
+                }
+
+                byte[] bytes = Encoding.UTF8.GetBytes(combinedMessage);
+                await _udpClient.SendAsync(bytes, bytes.Length, _options.Host, _options.Port);
+            }
             catch (Exception ex)
             {
                 OnException?.Invoke(this, ex);

EonaCat.Logger/EonaCatCoreLogger/UdpLoggerOptions.cs

@@ -15,6 +15,8 @@ namespace EonaCat.Logger.EonaCatCoreLogger
         
         public bool IsEnabled { get; set; } = true;
         public bool IncludeCorrelationId { get; set; }
+        public bool EnableBatching { get; set; }
+        public int BatchSize { get; set; } = 10;
     }
 
 }

EonaCat.Logger/Extensions/ObjectExtensions.cs

@@ -26,6 +26,59 @@ namespace EonaCat.Logger.Extensions
 
     public static class ObjectExtensions
     {
+        /// <summary>
+        /// Executes an action on the object if it satisfies a predicate.
+        /// </summary>
+        public static T If<T>(this T obj, Func<T, bool> predicate, Action<T> action)
+        {
+            if (obj != null && predicate(obj))
+            {
+                action(obj);
+            }
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Executes an action on the object if it does NOT satisfy a predicate.
+        /// </summary>
+        public static T IfNot<T>(this T obj, Func<T, bool> predicate, Action<T> action)
+        {
+            if (obj != null && !predicate(obj))
+            {
+                action(obj);
+            }
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Executes a function on an object if not null, returns object itself.
+        /// Useful for chaining.
+        /// </summary>
+        public static T Tap<T>(this T obj, Action<T> action)
+        {
+            if (obj != null)
+            {
+                action(obj);
+            }
+
+            return obj;
+        }
+
+        /// <summary>
+        /// Returns true if object implements a given interface.
+        /// </summary>
+        public static bool Implements<TInterface>(this object obj)
+        {
+            if (obj == null)
+            {
+                return false;
+            }
+
+            return typeof(TInterface).IsAssignableFrom(obj.GetType());
+        }
+
         /// <summary>
         /// Dumps any object to a string in JSON, XML, or detailed tree format.
         /// </summary>
@@ -61,6 +114,178 @@ namespace EonaCat.Logger.Extensions
             }
         }
 
+        /// <summary>
+        /// Returns a default value if the object is null.
+        /// </summary>
+        public static T OrDefault<T>(this T obj, T defaultValue = default) =>
+            obj == null ? defaultValue : obj;
+
+        /// <summary>
+        /// Returns the object if not null; otherwise executes a function to get a fallback.
+        /// </summary>
+        public static T OrElse<T>(this T obj, Func<T> fallback) =>
+            obj != null ? obj : fallback();
+
+        /// <summary>
+        /// Converts an object to JSON string with optional formatting.
+        /// </summary>
+        public static string ToJson(this object obj, bool indented = false)
+        {
+            try
+            {
+                return obj == null
+                    ? string.Empty
+                    : !indented ? Json.JsonHelper.ToJson(obj, Formatting.None) : Json.JsonHelper.ToJson(obj, Formatting.Indented);
+            }
+            catch
+            {
+                return string.Empty;
+            }
+        }
+
+        /// <summary>
+        /// Converts an object to string safely, returns empty string if null.
+        /// </summary>
+        public static string SafeToString(this object obj) =>
+            obj?.ToString() ?? string.Empty;
+
+        /// <summary>
+        /// Checks if an object is null or default.
+        /// </summary>
+        public static bool IsNullOrDefault<T>(this T obj) =>
+            EqualityComparer<T>.Default.Equals(obj, default);
+
+        /// <summary>
+        /// Safely casts an object to a specific type, returns default if cast fails.
+        /// </summary>
+        public static T SafeCast<T>(this object obj)
+        {
+            if (obj is T variable)
+            {
+                return variable;
+            }
+
+            return default;
+        }
+
+        /// <summary>
+        /// Safely tries to convert object to integer.
+        /// </summary>
+        public static int ToInt(this object obj, int defaultValue = 0)
+        {
+            if (obj == null)
+            {
+                return defaultValue;
+            }
+
+            return int.TryParse(obj.ToString(), out var val) ? val : defaultValue;
+        }
+
+        /// <summary>
+        /// Safely tries to convert object to long.
+        /// </summary>
+        public static long ToLong(this object obj, long defaultValue = 0)
+        {
+            if (obj == null)
+            {
+                return defaultValue;
+            }
+
+            return long.TryParse(obj.ToString(), out var val) ? val : defaultValue;
+        }
+
+        /// <summary>
+        /// Safely tries to convert object to double.
+        /// </summary>
+        public static double ToDouble(this object obj, double defaultValue = 0)
+        {
+            if (obj == null)
+            {
+                return defaultValue;
+            }
+
+            return double.TryParse(obj.ToString(), out var val) ? val : defaultValue;
+        }
+
+        /// <summary>
+        /// Safely tries to convert object to bool.
+        /// </summary>
+        public static bool ToBool(this object obj, bool defaultValue = false)
+        {
+            if (obj == null)
+            {
+                return defaultValue;
+            }
+
+            return bool.TryParse(obj.ToString(), out var val) ? val : defaultValue;
+        }
+
+        /// <summary>
+        /// Checks if an object is of a specific type.
+        /// </summary>
+        public static bool IsType<T>(this object obj) => obj is T;
+
+        /// <summary>
+        /// Executes an action if the object is not null.
+        /// </summary>
+        public static void IfNotNull<T>(this T obj, Action<T> action)
+        {
+            if (obj != null)
+            {
+                action(obj);
+            }
+        }
+
+        /// <summary>
+        /// Executes an action if the object is null.
+        /// </summary>
+        public static void IfNull<T>(this T obj, Action action)
+        {
+            if (obj == null)
+            {
+                action();
+            }
+        }
+
+        /// <summary>
+        /// Wraps the object into a single-item enumerable.
+        /// </summary>
+        public static IEnumerable<T> AsEnumerable<T>(this T obj)
+        {
+            if (obj != null)
+            {
+                yield return obj;
+            }
+        }
+
+        /// <summary>
+        /// Safely returns a string representation with max length truncation.
+        /// </summary>
+        public static string ToSafeString(this object obj, int maxLength)
+        {
+            string str = obj.SafeToString();
+            return str.Length <= maxLength ? str : str.Substring(0, maxLength);
+        }
+
+        /// <summary>
+        /// Returns object hash code safely (0 if null).
+        /// </summary>
+        public static int SafeHashCode(this object obj) =>
+            obj?.GetHashCode() ?? 0;
+
+        /// <summary>
+        /// Returns the object or throws a custom exception if null.
+        /// </summary>
+        public static T OrThrow<T>(this T obj, Func<Exception> exceptionFactory)
+        {
+            if (obj == null)
+            {
+                throw exceptionFactory();
+            }
+
+            return obj;
+        }
+
         private static string DumpJson(object currentObject, bool isDetailed)
         {
             var settings = new JsonSerializerSettings
@@ -421,5 +646,218 @@ namespace EonaCat.Logger.Extensions
             }
             return dict;
         }
+
+        /// <summary>
+        /// Converts any object to a human-readable log string, including collections and nested objects.
+        /// </summary>
+        public static string ToLogString(this object obj, int maxDepth = 3, int currentDepth = 0)
+        {
+            if (obj == null)
+            {
+                return "null";
+            }
+
+            if (currentDepth >= maxDepth)
+            {
+                return "...";
+            }
+
+            // Handle strings separately
+            if (obj is string str)
+            {
+                return str;
+            }
+
+            // Handle IEnumerable
+            if (obj is IEnumerable enumerable)
+            {
+                var items = new List<string>();
+                foreach (var item in enumerable)
+                {
+                    items.Add(item.ToLogString(maxDepth, currentDepth + 1));
+                }
+                return "[" + string.Join(", ", items) + "]";
+            }
+
+            // Handle primitive types
+            var type = obj.GetType();
+            if (type.IsPrimitive || obj is decimal || obj is DateTime || obj is Guid)
+            {
+                return obj.ToString();
+            }
+
+            // Handle objects with properties
+            try
+            {
+                var props = type.GetProperties();
+                var sb = new StringBuilder("{");
+                bool first = true;
+                foreach (var p in props)
+                {
+                    if (!first)
+                    {
+                        sb.Append(", ");
+                    }
+
+                    var val = p.GetValue(obj);
+                    sb.Append($"{p.Name}={val.ToLogString(maxDepth, currentDepth + 1)}");
+                    first = false;
+                }
+                sb.Append("}");
+                return sb.ToString();
+            }
+            catch
+            {
+                return obj.ToString();
+            }
+        }
+
+        /// <summary>
+        /// Checks if an object is considered "empty": null, empty string, empty collection.
+        /// </summary>
+        public static bool IsEmpty(this object obj)
+        {
+            if (obj == null)
+            {
+                return true;
+            }
+
+            if (obj is string str)
+            {
+                return string.IsNullOrWhiteSpace(str);
+            }
+
+            if (obj is ICollection col)
+            {
+                return col.Count == 0;
+            }
+
+            if (obj is IEnumerable enumerable)
+            {
+                return !enumerable.Cast<object>().Any();
+            }
+
+            return false;
+        }
+
+        /// <summary>
+        /// Executes an action if the object is not null and not empty.
+        /// </summary>
+        public static void IfNotEmpty<T>(this T obj, Action<T> action)
+        {
+            if (!obj.IsEmpty())
+            {
+                action(obj);
+            }
+        }
+
+        /// <summary>
+        /// Returns a default value if the object is null or empty.
+        /// </summary>
+        public static T OrDefaultIfEmpty<T>(this T obj, T defaultValue)
+        {
+            return obj.IsEmpty() ? defaultValue : obj;
+        }
+
+        /// <summary>
+        /// Returns true if the object is numeric (int, float, double, decimal, long, etc.).
+        /// </summary>
+        public static bool IsNumeric(this object obj)
+        {
+            if (obj == null)
+            {
+                return false;
+            }
+
+            return double.TryParse(obj.ToString(), out _);
+        }
+
+        /// <summary>
+        /// Converts an object to a numeric double, returns default if conversion fails.
+        /// </summary>
+        public static double ToDoubleSafe(this object obj, double defaultValue = 0)
+        {
+            if (obj == null)
+            {
+                return defaultValue;
+            }
+
+            return double.TryParse(obj.ToString(), out var d) ? d : defaultValue;
+        }
+
+        /// <summary>
+        /// Converts an object to a numeric int, returns default if conversion fails.
+        /// </summary>
+        public static int ToIntSafe(this object obj, int defaultValue = 0)
+        {
+            if (obj == null)
+            {
+                return defaultValue;
+            }
+
+            return int.TryParse(obj.ToString(), out var i) ? i : defaultValue;
+        }
+
+        /// <summary>
+        /// Returns the type name of an object safely.
+        /// </summary>
+        public static string GetTypeName(this object obj) =>
+            obj?.GetType().Name ?? "null";
+
+        /// <summary>
+        /// Executes a function if object is not null and returns a fallback value otherwise.
+        /// </summary>
+        public static TResult Map<T, TResult>(this T obj, Func<T, TResult> mapper, TResult fallback = default)
+        {
+            if (obj == null)
+            {
+                return fallback;
+            }
+
+            return mapper(obj);
+        }
+
+        /// <summary>
+        /// Masks sensitive strings (like passwords, tokens). Keeps first and last 2 characters visible.
+        /// </summary>
+        public static string MaskSensitive(this string str)
+        {
+            if (string.IsNullOrEmpty(str) || str.Length <= 4)
+            {
+                return "****";
+            }
+
+            int len = str.Length - 4;
+            return str.Substring(0, 2) + new string('*', len) + str.Substring(str.Length - 2, 2);
+        }
+
+        /// <summary>
+        /// Masks sensitive data in any object property that matches a keyword.
+        /// </summary>
+        public static void MaskProperties(this object obj, params string[] keywords)
+        {
+            if (obj == null || keywords == null || keywords.Length == 0)
+            {
+                return;
+            }
+
+            var props = obj.GetType().GetProperties();
+            foreach (var p in props)
+            {
+                if (!p.CanRead || !p.CanWrite)
+                {
+                    continue;
+                }
+
+                if (keywords.Any(k => p.Name.IndexOf(k, StringComparison.OrdinalIgnoreCase) >= 0))
+                {
+                    var val = p.GetValue(obj) as string;
+                    if (!string.IsNullOrEmpty(val))
+                    {
+                        p.SetValue(obj, val.MaskSensitive());
+                    }
+                }
+            }
+        }
     }
 }