private static async Task ProcessDirectoryAsync(string dir, bool forceUpdate = false)
{
Console.WriteLine($"Processing Directory {dir}");
var imageExtensions = new HashSet <string>(StringComparer.OrdinalIgnoreCase)
{
".png",
".jpg",
".bmp",
".jpeg",
".gif"
};
foreach (var file in
from file in Directory.EnumerateFiles(dir, "*", SearchOption.AllDirectories)
where imageExtensions.Contains(Path.GetExtension(file))
select file)
{
try
{
var fileName = Path.GetFileName(file);
var existing = await documentDb.FindDocumentByIdAsync <ImageMetadata>(fileName);
if (existing == null || forceUpdate)
{
Console.WriteLine($"Processing {file}");
// Resize (if needed) in order to reduce network latency and errors due to large files. Then store the result in a temporary file.
var resized = Util.ResizeIfRequired(file, 750);
Func <Task <Stream> > imageCB = async() => File.OpenRead(resized.Item2);
Console.Write("This is where we call Cognitive Services and store the results in ImageInsights, ");
ImageInsights insights = await ImageProcessor.ProcessImageAsync(imageCB, fileName);
Util.AdjustFaceInsightsBasedOnResizing(insights, resized.Item1);
Console.WriteLine($"Insights: {JsonConvert.SerializeObject(insights, Formatting.None)}");
Console.Write("store in Blob Storage, ");
var imageBlob = await blobStorage.UploadImageAsync(imageCB, fileName);
Console.Write("convert into ImageMetadata, ");
var metadata = new ImageMetadata(file);
metadata.AddInsights(insights);
metadata.BlobUri = imageBlob.Uri;
Console.WriteLine("and write to DocumentDB.");
if (existing == null)
{
metadata = (await documentDb.CreateDocumentIfNotExistsAsync(metadata, metadata.Id)).Item2;
}
else
{
metadata = await documentDb.UpdateDocumentAsync(metadata, metadata.Id);
}
}
else
{
Console.WriteLine($"Skipping {file}, exists and 'forceUpdate' not set.");
}
}
catch (Exception e)
{
Console.WriteLine($"Error: {e}");
}
}
}
