Code to receive an image file on the Bot Framework and send it to the Emotion API

gistfile1.txt

var imageCount = activity.Attachments.Count(a => a.ContentType.Contains("image"));

if (imageCount > 0)
{
    // Notify user that we got something
    var message = imageCount == 1 ? $"You've sent 1 image" : $"You've sent {imageCount} images";
    var imageReply = activity.CreateReply(message);
    await connector.Conversations.ReplyToActivityAsync(imageReply);
}

foreach (var attachment in activity.Attachments.Where(a => a.ContentType.Contains("image")).Take(1))
{
    var imageBytes = ConvertContentToByteArray(attachment.ContentUrl);

#error TODO: Add your Emotion API key here
    var emotionClient = new EmotionServiceClient("b436fxxxxxxxxxxxxxxcb30");
    var emotionResults = await emotionClient.RecognizeAsync(new MemoryStream(imageBytes));

    var aggregatedResults = new Dictionary<string, float>();
    foreach (var e in emotionResults)
    {
        foreach (var s in e.Scores.ToRankedList())
        {
            if (!aggregatedResults.ContainsKey(s.Key))
                aggregatedResults.Add(s.Key, s.Value);
            else
                aggregatedResults[s.Key] += s.Value;
        }
    }

    var emotionsMessage = $"I recognize {emotionResults.Count()} people, in general their emotion seems to be: {aggregatedResults.OrderByDescending(r => r.Value).First().Key}";
    var emotionsReply = activity.CreateReply(emotionsMessage);
    await connector.Conversations.ReplyToActivityAsync(emotionsReply);
}