private bool _hashDownloadFile(AttachmentMold attachment)
{
var fileInfo = new FileInfo(attachment.FileName);
var result = fileInfo.Exists;
return(result);
}
public AttachmentMessageViewModel(AttachmentMold attachment)
{
var mainWindowViewModel = Locator.Current.GetService <MainWindowViewModel>();
_isDownload = mainWindowViewModel.IsExistAttachment(attachment);
Id = attachment.Id;
SenderId = attachment.SenderId;
FileName = attachment.FileName;
Size = attachment.Size;
UploadDateTime = attachment.UploadDateTime;
Hash = attachment.Hash;
Text = !_isDownload ? "Загрузить" : "Открыть";
DownloadCommand = ReactiveCommand.Create <AttachmentMold>(async attachment =>
{
if (!_isDownload)
{
_isDownload = await mainWindowViewModel.DownloadAttachment(attachment);
Text = !_isDownload ? "Загрузить" : "Открыть";
}
else
{
mainWindowViewModel.OpenAttachment(attachment.FileName);
}
});
}
public async Task <bool> DownloadAttachment(AttachmentMold data)
{
try
{
//Тут надо убрать префикс получаемого файла
var pref = "attachment/";
var attachment = await serviceClient.GetAsync(new GetAttachment { Id = data.Id.Replace(pref, string.Empty) });
if (attachment == null)
{
return(false);
}
var savePath = Path.Combine(settings?.AttachmentDefaultPath, data.FileName);
var saveFileInfo = new FileInfo(savePath);
if (!saveFileInfo.Directory.Exists)
{
saveFileInfo.Directory.Create();
}
if (!string.IsNullOrEmpty(savePath))
{
await using (var fileStream = File.Create(savePath, (int)attachment.Length))
{
const int bufferSize = 4194304;
var buffer = new byte[bufferSize];
attachment.Seek(0, SeekOrigin.Begin);
while (attachment.Position < attachment.Length)
{
var read = await attachment.ReadAsync(buffer, 0, bufferSize);
await fileStream.WriteAsync(buffer, 0, read);
}
await fileStream.FlushAsync();
}
}
return(true);
}
catch (Exception e)
{
//TODO вывести ошибку в будущем
return(false);
}
}
public bool IsExistAttachment(AttachmentMold data)
{
var fileInfo = new FileInfo(Path.Combine(settings?.AttachmentDefaultPath, data.FileName));
return(fileInfo.Exists && fileInfo.Length == data.Size);
}
