private void ExpandFile(object o)
{
if (!int.TryParse(o.ToString(), out var param))
{
_messagingService.Message($"Invalid command");
return;
}
var requiredBytes = param * 1024 * 1024;
var inputStream = _fileReadOpenService.OpenFile();
if (inputStream == null || inputStream.Length > 8 * 1024)
{
_messagingService.Message($"Invalid input file selected");
return;
}
var outputStream = _fileWriteService.OpenFile();
if (outputStream == null)
{
_messagingService.Message($"Invalid output file selected");
return;
}
using (outputStream)
using (inputStream)
{
var buffer = new byte[inputStream.Length];
var actualRead = inputStream.Read(buffer, 0, buffer.Length);
var requiredLoops = requiredBytes / actualRead;
for (int i = 0; i < requiredLoops; i++)
{
outputStream.Write(buffer, 0, actualRead);
}
}
_messagingService.Message($"Successfully expanded file to {param} MB");
}