private async Task <(int added, int deleted, int total)> Rescan()
{
var now = DateTimeOffset.UtcNow;
int added = 0;
int total = 0;
var paths = await _storage.ScanBucket("sources");
foreach (var path in paths)
{
var existent = await _context.Files.Where(f => f.FileName == path).FirstOrDefaultAsync();
if (existent == null)
{
var file = new FileDbModel(path)
{
LastSyncDate = now
};
await _context.Files.AddAsync(file);
added++;
}
else
{
existent.LastSyncDate = now;
}
total++;
}
await _context.SaveChangesAsync();
var old = _context.Files.Where(f => f.LastSyncDate < now);
var deleted = old.Delete();
return(added, deleted, total);
}
private async Task <FileDbModel> GenerateFileGif(FileDbModel file)
{
var path = await _storage.GetFullFilePath(file.FileName);
var previewPath = await _storage.GeneratePath($"{file.FileId}_{DateTimeOffset.Now.ToUnixTimeSeconds()}.gif");
await Conversion.ToGif(path, previewPath, 0).Start();
return(new FileDbModel(previewPath));
}
private async Task <FileDbModel> ConvertVideoInternal(FileDbModel file, VideoFormat format)
{
var path = await _storage.GetFullFilePath(file.FileName);
var newFilePath =
await _storage.GeneratePath(
$"{file.FileId}_{DateTimeOffset.Now.ToUnixTimeSeconds()}_{format}.mp4");
IMediaInfo mediaInfo = await MediaInfo.Get(path);
IStream videoStream = mediaInfo.VideoStreams.FirstOrDefault().SetFormat(format);
await Conversion.New().AddStream(videoStream)
.SetOutput(newFilePath)
.Start();
return(new FileDbModel(newFilePath));
}
private async Task <FileDbModel> GenerateFilePreview(FileDbModel file)
{
var path = await _storage.GetFullFilePath(file.FileName);
var previewPath = await _storage.GeneratePath($"{file.FileId}_{DateTimeOffset.Now.ToUnixTimeSeconds()}.jpg");
IMediaInfo mediaInfo = await MediaInfo.Get(path);
var videoStream = mediaInfo.VideoStreams.FirstOrDefault() ?? throw new Exception($"Empty video stream {path}");
Random rnd = new Random();
for (int i = 0; i < 20; i++)
{
_storage.RemoveFile(previewPath);
var targetSec = rnd.Next(1, videoStream.Duration.Seconds);
try
{
await Conversion.New().AddStream(videoStream
.SetCodec(VideoCodec.Png)
.SetOutputFramesCount(1)
.SetSize(new VideoSize(_settings.Value.DefaultPreviewSize.Width,
_settings.Value.DefaultPreviewSize.Height))
.SetSeek(TimeSpan.FromSeconds(targetSec)))
.SetOutput(previewPath)
.Start();
if (GetAverageColor(previewPath) > 30)
{
break;
}
_storage.RemoveFile(previewPath);
}
catch (ConversionException e)
{
Console.WriteLine(e);
}
}
return(new FileDbModel(previewPath));
}
public static FileDto ToDto(this FileDbModel db)
{
return(Mapper.Map <FileDto>(db));
}
