New: Backup database before updating

src/NzbDrone.Update/UpdateEngine/BackupAppData.cs

@@ -0,0 +1,44 @@
+using System.IO;
+using NLog;
+using NzbDrone.Common;
+using NzbDrone.Common.Disk;
+using NzbDrone.Common.EnvironmentInfo;
+
+namespace NzbDrone.Update.UpdateEngine
+{
+    public interface IBackupAppData
+    {
+        void Backup();
+    }
+
+    public class BackupAppData : IBackupAppData
+    {
+        private readonly IAppFolderInfo _appFolderInfo;
+        private readonly IDiskProvider _diskProvider;
+        private readonly Logger _logger;
+
+        public BackupAppData(IAppFolderInfo appFolderInfo, IDiskProvider diskProvider, Logger logger)
+        {
+            _appFolderInfo = appFolderInfo;
+            _diskProvider = diskProvider;
+            _logger = logger;
+        }
+
+        public void Backup()
+        {
+            _logger.Info("Backing up appdata (database/config)");
+            var appDataPath = _appFolderInfo.GetAppDataPath();
+            var backupFolderAppData = _appFolderInfo.GetUpdateBackUpAppDataFolder();
+            var binFolder = Path.Combine(backupFolderAppData, "bin");
+
+            _diskProvider.CreateFolder(backupFolderAppData);
+            _diskProvider.CopyFolder(appDataPath, backupFolderAppData);
+
+            if (_diskProvider.FolderExists(binFolder))
+            {
+                _logger.Info("Deleting bin folder from appdata");
+                _diskProvider.DeleteFolder(binFolder, true);
+            }
+        }
+    }
+}