first commit

Services/CleanerService.cs

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+using HanaToolbox.Config;
+using HanaToolbox.Logging;
+using HanaToolbox.Services.Interfaces;
+
+namespace HanaToolbox.Services;
+
+/// <summary>
+/// Deletes backup and log files older than their configured retention period.
+/// Runs as root (no user switching needed for file deletion).
+/// </summary>
+public sealed class CleanerService(AppLogger logger) : ICleanerService
+{
+    public Task RunAsync(CleanerConfig config, CancellationToken ct = default)
+    {
+        logger.Step($"Cleaning tenant backup path: {config.TenantBackupPath} "
+                  + $"(retention: {config.TenantRetentionDays}d)");
+        CleanDirectory(config.TenantBackupPath, config.TenantRetentionDays);
+
+        foreach (var logPath in config.LogBackupPaths)
+        {
+            ct.ThrowIfCancellationRequested();
+            logger.Step($"Cleaning log backup path: {logPath} "
+                      + $"(retention: {config.LogRetentionDays}d)");
+            CleanDirectory(logPath, config.LogRetentionDays);
+        }
+
+        logger.Success("Cleanup complete.");
+        return Task.CompletedTask;
+    }
+
+    private void CleanDirectory(string directory, int retentionDays)
+    {
+        if (!Directory.Exists(directory))
+        {
+            logger.Warning($"Directory not found, skipping: {directory}");
+            return;
+        }
+
+        var cutoff = DateTime.UtcNow.AddDays(-retentionDays);
+        int deleted = 0;
+
+        try
+        {
+            foreach (var file in Directory.EnumerateFiles(directory, "*", SearchOption.TopDirectoryOnly))
+            {
+                try
+                {
+                    if (File.GetLastWriteTimeUtc(file) < cutoff)
+                    {
+                        File.Delete(file);
+                        deleted++;
+                        logger.Info($"Deleted: {file}");
+                    }
+                }
+                catch (Exception ex)
+                {
+                    logger.Warning($"Could not delete '{file}': {ex.Message}");
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            logger.Error($"Error enumerating '{directory}': {ex.Message}");
+        }
+
+        logger.Info($"Deleted {deleted} file(s) from '{directory}'.");
+    }
+}