public static async Task <HttpResponseData> RunAsync(
[HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "sessions/{sessionIdString}/snapshots")] HttpRequestData req,
string sessionIdString,
CreateSnapshotDto data
)
{
// Create response
var response = req.CreateResponse();
// Get user id
var userId = Utils.GetUserId(req.Headers);
// Validate params
Guid sessionId;
var valid = ValidateAndTryParse(userId, sessionIdString, out sessionId, data);
if (valid.Item1)
{
try
{
// Start tasks
var getPerceivedEmotionTask = CognitiveServices.GetPerceivedEmotionAsync(data.ImageBase64);
var getSnapshotContainerTask = CosmosDb.GetContainerAsync(CosmosDb.SNAPSHOT_CONTAINER_ID);
var getSessionContainerTask = CosmosDb.GetContainerAsync(CosmosDb.SESSION_CONTAINER_ID);
// Wait all tasks to complete
Task.WaitAll(
getPerceivedEmotionTask,
getSnapshotContainerTask,
getSessionContainerTask
);
// Get task results
var perceivedEmotion = getPerceivedEmotionTask.Result;
var snapshotContainer = getSnapshotContainerTask.Result;
var sessionContainer = getSessionContainerTask.Result;
// Check if not null
if (perceivedEmotion != null)
{
// Get item
var query = new QueryDefinition(@$ "SELECT * FROM c WHERE c.userId = @userId AND c.id = @sessionId")
.WithParameter("@userId", userId)
.WithParameter("@sessionId", sessionId);
var session = await CosmosDb.GetItemByQueryAsync <Session>(sessionContainer, query);
if (session != null)
{
// Update item
session.LastUpdatedDateTime = DateTime.Now;
// Create new instance
var snapshot = new Models.Snapshot()
{
SessionId = sessionId,
PerceivedEmotion = perceivedEmotion
};
Task.WaitAll(
// Save to database
CosmosDb.CreateItemAsync <Snapshot>(snapshotContainer, snapshot, snapshot.SessionId.ToString()),
CosmosDb.UpdateItemAsync <Session>(sessionContainer, session, session.Id.ToString(), session.UserId.ToString()),
// Response save successful
response.WriteAsJsonAsync(snapshot).AsTask()
);
}
else
{
// Response not found message
await response.WriteAsJsonAsync("Session not found");
}
}
else
{
// Response no result message
await response.WriteAsJsonAsync("No faces detected");
}
}
catch (CosmosException ex)
{
// Response error message
await response.WriteAsJsonAsync(ex.Message);
// Set http status code
response.StatusCode = (HttpStatusCode)ex.Status;
}
}
else
{
// Response invalid
await response.WriteAsJsonAsync(valid.Item2);
// Set http status code
response.StatusCode = HttpStatusCode.BadRequest;
}
return(response);
}
private static (bool, string) ValidateAndTryParse(Guid userId, string sessionIdString, out Guid sessionId, CreateSnapshotDto data)
{
var valid = true;
var message = new List <string>();
// Validate user id
if (userId == Guid.Empty)
{
valid = false;
message.Add("User ID is invalid.");
}
// Validate and try parse session id
if (!Guid.TryParse(sessionIdString, out sessionId))
{
valid = false;
message.Add("Session ID is invalid.");
}
// Validate data
if (string.IsNullOrWhiteSpace(data.ImageBase64))
{
valid = false;
message.Add("Image is missing.");
}
return(valid, string.Join("\n", message));
}