public static void AddImageFlowBlobService(IConfiguration configuration, IServiceCollection services, FileSpec fileSpec, string path)
{
var imageFlowSpec = ImageFileSpecs.GetImageFileSpec(fileSpec);
services.AddImageflowAzureBlobService(new AzureBlobServiceOptions(configuration["Storage:ConnectionString"], new BlobClientOptions())
.MapPrefix(path, imageFlowSpec.ContainerName));
}
private static async Task ProcessImageAsync(Image image, byte[] imageBytes, FileSpec fileSpec)
{
_log.Information($"LB.PhotoGalleries.Worker.Program.ProcessImageAsync() - Image {image.Id} for file spec {fileSpec}");
var imageFileSpec = ImageFileSpecs.GetImageFileSpec(fileSpec);
// we only generate images if the source image is larger than the size we're being asked to resize to, i.e. we only go down in size
var longestSide = image.Metadata.Width > image.Metadata.Height ? image.Metadata.Width : image.Metadata.Height;
if (longestSide <= imageFileSpec.PixelLength)
{
_log.Warning($"LB.PhotoGalleries.Worker.Program.ProcessImageAsync() - Image too small for this file spec: {fileSpec}: {image.Metadata.Width} x {image.Metadata.Height}");
return;
}
// create the new image file
var storageId = imageFileSpec.GetStorageId(image);
await using (var imageFile = await GenerateImageAsync(image, imageBytes, imageFileSpec))
{
// upload the new image file to storage
var containerClient = _blobServiceClient.GetBlobContainerClient(imageFileSpec.ContainerName);
var uploadStopwatch = new Stopwatch();
uploadStopwatch.Start();
await containerClient.UploadBlobAsync(storageId, imageFile);
uploadStopwatch.Stop();
_log.Information($"LB.PhotoGalleries.Worker.Program.ProcessImageAsync() - Upload blob elapsed time: {uploadStopwatch.ElapsedMilliseconds}ms");
}
// update the Image object with the storage id of the newly-generated image file
switch (fileSpec)
{
case FileSpec.Spec3840:
image.Files.Spec3840Id = storageId;
break;
case FileSpec.Spec2560:
image.Files.Spec2560Id = storageId;
break;
case FileSpec.Spec1920:
image.Files.Spec1920Id = storageId;
break;
case FileSpec.Spec800:
image.Files.Spec800Id = storageId;
break;
case FileSpec.SpecLowRes:
image.Files.SpecLowResId = storageId;
break;
}
}
private async Task HandleDeletePreGenImagesAsync(Image image)
{
await DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec3840));
await DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec2560));
await DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec1920));
await DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec800));
await DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.SpecLowRes));
image.Files.Spec3840Id = null;
image.Files.Spec2560Id = null;
image.Files.Spec1920Id = null;
image.Files.Spec800Id = null;
image.Files.SpecLowResId = null;
await UpdateImageAsync(image);
}
/// <summary>
/// Deletes the original image and any generated images for an Image.
/// </summary>
private static async Task DeleteImageFilesAsync(Image image, bool clearImageFileReferences = false)
{
// delete all image files
var deleteTasks = new List <Task>
{
DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.SpecOriginal)),
DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec3840)),
DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec2560)),
DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec1920)),
DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.Spec800)),
DeleteImageFileAsync(image, ImageFileSpecs.GetImageFileSpec(FileSpec.SpecLowRes))
};
await Task.WhenAll(deleteTasks);
if (clearImageFileReferences)
{
image.Files.OriginalId = null;
image.Files.Spec3840Id = null;
image.Files.Spec2560Id = null;
image.Files.Spec1920Id = null;
image.Files.Spec800Id = null;
image.Files.SpecLowResId = null;
}
}
