Fix crash when the user does not have permission to access a subdirec…

…tory in a folder during the check to ensure the folder is not empty. Closes #395

- Version bump to 3.2.0

CompactGUI.Core/SharedMethods.vb

@@ -10,14 +10,47 @@ Public Module SharedMethods
         If Not IO.Directory.Exists(folder) Then : Return (False, "Directory does not exist")
         ElseIf folder.Contains((Environment.GetFolderPath(Environment.SpecialFolder.Windows))) Then : Return (False, "Cannot compress system directory")
         ElseIf folder.EndsWith(":\") Then : Return (False, "Cannot compress root directory")
-        ElseIf Not IO.Directory.EnumerateFiles(folder, "*", SearchOption.AllDirectories).Any() Then : Return (False, "Directory is empty")
+        ElseIf IsDirectoryEmptySafe(folder) Then : Return (False, "This directory is either empty or you are not authorized to access its files.")
         ElseIf DriveInfo.GetDrives().First(Function(f) folder.StartsWith(f.Name)).DriveFormat <> "NTFS" Then : Return (False, "Cannot compress a directory on a non-NTFS drive")
         End If
 
         Return (True, "")
 
     End Function
 
+    Function IsDirectoryEmptySafe(folder As String)
+
+        Try
+            Return Not IO.Directory.EnumerateFileSystemEntries(folder).Any()
+
+            For Each subdir In IO.Directory.EnumerateDirectories(folder)
+                Try
+                    If Not IsDirectoryEmptySafe(subdir) Then Return False
+                Catch ex As System.UnauthorizedAccessException
+
+                End Try
+            Next
+
+            For Each file In IO.Directory.EnumerateFiles(folder)
+                Try
+                    Return False
+                Catch ex As System.UnauthorizedAccessException
+
+                End Try
+            Next
+
+            Return True
+
+        Catch ex As System.UnauthorizedAccessException
+            MsgBox("You are not authorized to access some items in this folder." & vbCrLf & "Please try running CompactGUI as an administrator, otherwise these items will be skipped.", MsgBoxStyle.Exclamation, "Unauthorized Access")
+            Return False
+
+        Catch ex As Exception
+            Return False
+        End Try
+
+    End Function
+
     Function GetFileSizeOnDisk(file As String) As Long
         Dim hosize As UInteger
         Dim losize As UInteger = GetCompressedFileSizeW(file, hosize)

CompactGUI/Models/UpdateHandler.vb

@@ -2,7 +2,7 @@
 Imports System.Text.Json
 Public Class UpdateHandler
 
-    Public Shared CurrentVersion As New SemVersion(3, 1, 1)
+    Public Shared CurrentVersion As New SemVersion(3, 2, 0)
     Public Shared NewVersion As SemVersion
     Shared UpdateURL As String = "https://raw.githubusercontent.com/IridiumIO/CompactGUI/database/version.json"