private async void nextStep(Steps currentStep)
{
await semaphore.WaitAsync();
try {
switch (currentStep)
{
case Steps.PersonDetected:
{
if (lastStep != currentStep)
{
session = Guid.NewGuid();
Log("person detected, getting emotion");
//take a picture
var emotion = await GetEmotion(cancellationSource.Token, 0);
if (emotion != null)
{
Log($"emotion detected: {emotion.Emotion} {emotion.Score}");
emotion.SessionId = session;
emotion.UserPresent = true;
//send a message to the tree: lights on
await sendToTree(emotion);
}
else
{
return; //do not set lastStep, have a second chance
}
}
break;
}
case Steps.PersonGone:
{
if (lastStep != currentStep)
{
Log("user gone, sending message to tree");
var emotion = new EmotionResult { SessionId = session, Date = DateTime.Now };
await sendToTree(emotion);
}
break;
}
case Steps.Lights:
{
Log("Lights on, measure happiness");
//take a picture
var emotion = await GetEmotion(cancellationSource.Token, 1);
if (emotion != null)
{
Log($"emotion detected: {emotion.Emotion} {emotion.Score}");
emotion.SessionId = session;
emotion.UserPresent = true;
//send a message to the tree: lights on
await sendToTree(emotion);
}
break;
}
}
lastStep = currentStep;
}
finally
{
semaphore.Release();
}
}
private async Task sendToTree(EmotionResult emotion)
{
var emotionJson = Newtonsoft.Json.JsonConvert.SerializeObject(emotion);
Message m = new Message(Encoding.UTF8.GetBytes(emotionJson));
m.To = Config.Default.PartnerDevice;
Log("Sending to tree");
await deviceClient.SendEventAsync(m);
Log("Message sent");
}