public static bool?CanWrite(this FileConflictAction action, string source, string destination)
{
if (File.Exists(source) == false)
{
return(null);
}
if (File.Exists(destination) == false)
{
return(true);
}
if (action.HasFlag(FileConflictAction.Overwrite))
{
return(true);
}
if (action.HasFlag(FileConflictAction.Newer))
{
return(new FileInfo(source).LastWriteTime > new FileInfo(destination).LastWriteTime);
}
return(false);
}
private FileTraverseOperation CopyOrMoveOperation(string from, string to, bool move)
{
if (from == to)
{
if (move)
{
return(null);
}
to = to.CopyableFileName();
}
return(new FileTraverseOperation(from, async(path) =>
{
var dest = path.Replace(from, to);
if (path == dest)
{
return false;
}
if (new FileInfo(path).Attributes.HasFlag(FileAttributes.Directory))
{
try
{
if (Directory.Exists(dest) == false)
{
Directory.CreateDirectory(dest);
}
if (move)
{
Directory.Delete(path);
}
}
catch (UnauthorizedAccessException)
{
if (await ConfirmContinueOperationAsync(Properties.Resources.Copy_UnauthorizedException) == false)
{
return true;
}
}
catch (IOException)
{
}
return false;
}
if (conflictAction.HasFlag(FileConflictAction.ApplyToAll) == false)
{
if ((conflictAction = await ConfirmFileConflictActionAsync(path, dest)) == FileConflictAction.None)
{
return true;
}
}
if (conflictAction.CanWrite(path, dest) == true)
{
var restoreReadOnly = false;
if (File.Exists(dest))
{
var attributes = new FileInfo(dest).Attributes;
if (attributes.HasFlag(FileAttributes.ReadOnly))
{
attributes &= ~FileAttributes.ReadOnly;
File.SetAttributes(dest, attributes);
restoreReadOnly = true;
}
}
try
{
Directory.CreateDirectory(Path.GetDirectoryName(dest));
if (move)
{
if (path != dest)
{
File.Delete(dest);
File.Move(path, dest);
}
}
else
{
File.Copy(path, dest, true);
}
}
catch (UnauthorizedAccessException)
{
return await ConfirmContinueOperationAsync(Properties.Resources.Copy_UnauthorizedException);
}
catch (IOException)
{
return await ConfirmContinueOperationAsync(Properties.Resources.Copy_UnauthorizedException);
}
if (restoreReadOnly)
{
var attributes = new FileInfo(dest).Attributes;
attributes |= FileAttributes.ReadOnly;
File.SetAttributes(dest, attributes);
}
}
return false;
}));
}
