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);
}
static async Task <MessageResponse> StoreImage(EnvSettings.CameraDevice camera)
{
try
{
// Get camera credentials
string plainCredentials = $"{camera.Username}:{camera.Password}";
string svcCredentials = Convert.ToBase64String(ASCIIEncoding.ASCII.GetBytes(plainCredentials));
_httpClient.DefaultRequestHeaders.Authorization = new AuthenticationHeaderValue("Basic", svcCredentials);
_consoleLogger.LogDebug($"Camera URL: {camera.ImageEndpoint}");
// Make GET request to get image
var response = await _httpClient.GetAsync(camera.ImageEndpoint);
if (!response.IsSuccessStatusCode)
{
_consoleLogger.LogError($"Failed to make GET request to camera {camera.Id}. Response: {response.ReasonPhrase}");
return(MessageResponse.Abandoned);
}
else
{
_consoleLogger.LogDebug($"Get request to camera {camera.Id} was successful");
}
byte[] byteArray = await response.Content.ReadAsByteArrayAsync();
// Save the image in respective local folder for each AI module's tag
DateTime utcDate = DateTime.UtcNow;
TimeZoneInfo localZone = TimeZoneInfo.FindSystemTimeZoneById(camera.TimeZoneId);
DateTime localDate = TimeZoneInfo.ConvertTimeFromUtc(utcDate, localZone);
string imageName = $"{localDate.ToString("yyyyMMddTHHmmssfff")}";
foreach (var module in camera.AIModules)
{
foreach (var tag in module.Tags)
{
// Check if it is time to capture image for the specific tag
if (_counterValue % tag.CaptureTimeInterval != 0)
{
continue;
}
_consoleLogger.LogTrace($"Time to capture image for camera {camera.Id} and tag {tag.Name}");
string tagFolder = Path.Combine(camera.LocalFolder, camera.FactoryId, module.Name, tag.Name);
if (!Directory.Exists(tagFolder))
{
Directory.CreateDirectory(tagFolder);
}
string imagePath = Path.Combine(tagFolder, Path.ChangeExtension(imageName, "jpg"));
File.WriteAllBytes(imagePath, byteArray);
_consoleLogger.LogDebug($"Saved image to path {imagePath}");
}
}
}
catch (Exception e)
{
_consoleLogger.LogCritical("StoreImage caught an exception: {0}", e);
}
return(MessageResponse.Completed);
}
