public async Task <IReadOnlyCollection <string> > SynchronizeFilesAsync()
{
var processedFiles = new List <string>();
var sourceFiles = _source.GetFiles();
foreach (var file in sourceFiles)
{
string destinationPath = _source.ToRelativePath(file.FullName);
var fileOnDestination = _destination.GetFile(destinationPath);
if (fileOnDestination is null)
{
// File is missing on destination
using var stream = file.OpenRead();
await _destination.WriteFileAsync(destinationPath, stream);
processedFiles.Add(destinationPath);
}
else if (fileOnDestination.ContentMD5 != MD5Hash(file.FullName))
{
// File on destination is different
await _destination.DeleteFileAsync(destinationPath);
using var stream = file.OpenRead();
await _destination.WriteFileAsync(destinationPath, stream);
processedFiles.Add(destinationPath);
}
else
{
_logger.LogInformation("File up to date: {file}", destinationPath);
}
}
var destinationFiles = _destination.GetFiles();
foreach (var file in destinationFiles)
{
if (!File.Exists(_source.ToFullPath(file.Path)))
{
await _destination.DeleteFileAsync(file.Path);
}
}
return(processedFiles);
}