public async Task EnhanceAsync(MetadataRequest request)
{
var file = request.File;
if (request.Type != MediaType.Unknown)
{
return;
}
var mimeType = file.MimeType;
ImageInfo?imageInfo = null;
await using (var uploadStream = file.OpenRead())
{
imageInfo = await assetThumbnailGenerator.GetImageInfoAsync(uploadStream, mimeType);
}
if (imageInfo != null)
{
var isSwapped = imageInfo.Orientation > ImageOrientation.TopLeft;
if (isSwapped)
{
var tempFile = TempAssetFile.Create(file);
await using (var uploadStream = file.OpenRead())
{
await using (var tempStream = tempFile.OpenWrite())
{
await assetThumbnailGenerator.FixOrientationAsync(uploadStream, mimeType, tempStream);
}
}
await using (var tempStream = tempFile.OpenRead())
{
imageInfo = await assetThumbnailGenerator.GetImageInfoAsync(tempStream, mimeType) ?? imageInfo;
}
await file.DisposeAsync();
request.File = tempFile;
}
}
if (imageInfo != null)
{
request.Type = MediaType.Image;
request.Metadata.SetPixelWidth(imageInfo.PixelWidth);
request.Metadata.SetPixelHeight(imageInfo.PixelHeight);
}
}
public IEnumerable <string> Format(MetadataRequest request)
{
if (request.Type == MediaType.Image)
{
var w = request.Metadata.GetPixelWidth();
var h = request.Metadata.GetPixelHeight();
if (w != null && h != null)
{
yield return($"{w}x{h}px");
}
}
}
public async Task <Media> UploadAsync(string appId, AssetFile file,
CancellationToken ct = default)
{
Guard.NotNullOrEmpty(appId);
Guard.NotNull(file);
var now = clock.GetCurrentInstant();
var request = new MetadataRequest
{
File = file
};
foreach (var metadataSource in mediaMetadataSources)
{
await metadataSource.EnhanceAsync(request);
}
var infos = new List <string>();
foreach (var metadataSource in mediaMetadataSources)
{
infos.AddRange(metadataSource.Format(request));
}
var fileInfo = string.Join(", ", infos);
var media = new Media(appId, file.FileName, now)
{
FileInfo = fileInfo,
FileSize = file.FileSize,
LastUpdate = now,
Metadata = request.Metadata,
MimeType = file.MimeType,
Type = request.Type
};
await using (var stream = request.File.OpenRead())
{
await mediaFileStore.UploadAsync(appId, media, stream, ct);
}
await mediaRepository.UpsertAsync(media, ct);
return(media);
}
