public static async Task <IActionResult> Run(
[HttpTrigger(AuthorizationLevel.Function, "post", Route = null)] HttpRequest req,
ILogger log)
{
try
{
log.LogInformation("C# HTTP trigger function processed a request.");
string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
CameraAnalysisResult cameraAnalysisResult = JsonConvert.DeserializeObject <CameraAnalysisResult>(requestBody);
List <string> lines = new List <string>()
{
};
lines.Add($"Camera: {cameraAnalysisResult.CameraId}");
foreach (var image in cameraAnalysisResult.ImageAnalysisResults)
{
lines.Add($"{NonBreakingSpace(5)}- Time: {image.Timestamp}");
lines.Add($"{NonBreakingSpace(5)}- Image: {image.ImageUri}");
lines.Add($"{NonBreakingSpace(5)}- Detected events:");
foreach (var result in image.Results)
{
lines.Add($"{NonBreakingSpace(10)}- {result.TagName}");
}
}
string text = string.Join(_lineSep, lines);
return(new OkObjectResult(text));
}
catch (Exception e)
{
log.LogInformation($"FormatEmail failed. Exception message: {e}");
throw e;
}
}
static async Task <MessageResponse> AnalyzeImage(EnvSettings.CameraDevice camera)
{
try
{
List <ImageAnalysisResult> imageAnalysisResults = new List <ImageAnalysisResult>()
{
};
// Get details for AI module tags' folders
foreach (var module in camera.AIModules)
{
foreach (var tag in module.Tags)
{
// Check if it is time to analyze images for current tag
if (_counterValue % tag.AnalyzeTimeInterval != 0)
{
continue;
}
// Analyze each image in the tag's folder
string tagFolder = Path.Combine(camera.LocalFolder, camera.FactoryId, module.Name, tag.Name);
string[] images = Directory.GetFiles(tagFolder);
_consoleLogger.LogDebug($"Found {images.Length} images in folder {tagFolder}");
// Analyze image files asyncrhonously
Task <ImageAnalysisResult>[] tasks = new Task <ImageAnalysisResult> [images.Length];
for (int i = 0; i < images.Length; i++)
{
string filePath = Path.Combine(tagFolder, images[i]);
tasks[i] = AnalyzeImage(filePath, camera.FactoryId, camera.Id, module, tag, camera.OutputFolder);
}
// Wait for tasks to complete
var taskResults = await Task.WhenAll(tasks);
// Add to bigger list
imageAnalysisResults.AddRange(taskResults.Where(x => x != null));
/// Clean up local tag folder is not needed since
/// every image is deleted during the inner method.
}
}
// Send message to hub only if there are any results to report
if (imageAnalysisResults.Count() > 0)
{
// Create camera results object
CameraAnalysisResult cameraResults = new CameraAnalysisResult(camera.FactoryId, camera.Id, imageAnalysisResults);
// Send message to hub for notification purposes
_consoleLogger.LogTrace($"Sending notification message to hub for camera {camera.Id}. # of results: {cameraResults.ImageAnalysisResults.Length}");
// Create hub message and set its properties
Message message = new Message(Encoding.UTF8.GetBytes(JsonConvert.SerializeObject(cameraResults)));
message.Properties.Add("messageType", "notification");
// Send notification message
await SendMessageToHub(message);
// Log it
_consoleLogger.LogTrace($"Sent notification message for camera {camera.Id}");
}
}
catch (Exception e)
{
_consoleLogger.LogCritical("AnalyzeImage caught an exception: {0}", e);
}
return(MessageResponse.Completed);
}
