Filesystem: Add new method GetVersionedFilenameWithFileCheck

Filesystem/File.vb

@@ -109,11 +109,21 @@ Public Class File
     ''' <summary>
     ''' Adds file version string to given filename `Destination` if that file already exists.
     ''' </summary>
-    ''' <param name="Destination"></param>
+    ''' <param name="pFilePath">Filepath to check</param>
-    ''' <returns></returns>
+    ''' <returns>Versioned string</returns>
-    Public Function GetVersionedFilename(Destination As String) As String
+    Public Function GetVersionedFilename(pFilePath As String) As String
+        Return GetVersionedFilenameWithFilecheck(pFilePath, Function(pPath As String) IO.File.Exists(pFilePath))
+    End Function
+
+    ''' <summary>
+    ''' Adds file version string to given filename `Destination` if that file already exists.
+    ''' </summary>
+    ''' <param name="pFilePath">Filepath to check</param>
+    ''' <param name="pFileExistsAction">Custom action to check for file existence</param>
+    ''' <returns>Versioned string</returns>
+    Public Function GetVersionedFilenameWithFilecheck(pFilePath As String, pFileExistsAction As Func(Of String, Boolean)) As String
         Try
-            Dim oFileName As String = Destination
+            Dim oFileName As String = pFilePath
             Dim oFinalFileName = oFileName
 
             Dim oDestinationDir = Path.GetDirectoryName(oFileName)
@@ -131,7 +141,7 @@ Public Class File
             ' Shorten the filename (only filename, without extension or version)
             ' by cutting the length in half. This should work no matter how long the path and/or filename are.
             ' The initial check operates on the full path to catch all scenarios.
-            If Destination.Length > MAX_FILE_PATH_LENGTH Then
+            If pFilePath.Length > MAX_FILE_PATH_LENGTH Then
                 _Logger.Info("Filename is too long. Filename will be cut to prevent further errors.")
                 _Logger.Info("Original Filename is: {0}", oFileNameWithoutExtension)
                 Dim oNewLength As Integer = Math.Round(oFileNameWithoutExtension.Length / 2)
@@ -147,15 +157,15 @@ Public Class File
                 _Logger.Debug("Intermediate Filename is {0}", oFinalFileName)
                 _Logger.Debug("File version: {0}", oFileVersion)
                 oFileVersion += 1
-            Loop While (IO.File.Exists(oFinalFileName))
+            Loop While pFileExistsAction(oFinalFileName) = True
 
             _Logger.Debug("Final Filename is {0}", oFinalFileName)
 
             Return oFinalFileName
         Catch ex As Exception
-            _Logger.Warn("Filename {0} could not be versioned. Original filename will be returned!", Destination)
+            _Logger.Warn("Filename {0} could not be versioned. Original filename will be returned!", pFilePath)
             _Logger.Error(ex)
-            Return Destination
+            Return pFilePath
         End Try
     End Function
 
@@ -195,6 +205,8 @@ Public Class File
             oStringVersion = 1
         End If
 
+        _Logger.Debug("Versioned: String [{0}], Version [{1}]", pString, oStringVersion)
+
         Return New Tuple(Of String, Integer)(pString, oStringVersion)
     End Function