public IActionResult Create([FromBody] AttendanceRegistrationData data)
{
var dataValidation = LogHelper.ValidateRegistrationData(data, this._context, this._configuration);
if (data == null)
{
return(BadRequest());
}
else if (!dataValidation.valid)
{
if (!string.IsNullOrWhiteSpace(dataValidation.error))
{
return(Content($"Error: {dataValidation.error}"));
}
return(Content("Error: Invalid data"));
}
data.Attendance.Longitude = data.GeoLon;
data.Attendance.Latitude = data.GeoLat;
data.Attendance.Timestamp = data.SessionStartTimestamp;
// Remove existing log in same date
var existingLogs = LogHelper.GetDuplicatedLog(data.Attendance, _context);
if (existingLogs.Count() > 0)
{
_context.AttendanceLog.RemoveRange(existingLogs);
_context.SaveChanges();
}
var log = data.Attendance;
log.Id = AdoHelper.GetNextId("AttendanceLog", _connString);
_context.AttendanceLog.Add(log);
_context.SaveChanges();
return(CreatedAtRoute("GetLog", new { id = log.Id }, log));
}
public static AttendanceRegistrationDataValidationObject ValidateRegistrationData(AttendanceRegistrationData data, attWebApiContext context, IConfiguration configuration)
{
var valid = true;
var error = string.Empty;
if (!LogHelper.ValidateNewAttendanceLog(data.Attendance, context))
{
valid = false;
}
else
{
// Validate location and timestamp
if (data.CoursesAssignmentID != null)
{
// Classroom's coordinates
var classRoom = (from c in context.ClassRooms
join ca in context.CoursesAssignments on c.Id equals ca.ClassRoomId
where ca.Id == data.CoursesAssignmentID
select c).SingleOrDefault();
if (classRoom != default(ClassRooms) && classRoom.Longitude != null && classRoom.Latitude != null && classRoom.RangeInMeters != null)
{
double thisLon = (double)classRoom.Longitude;
double thisLat = (double)classRoom.Latitude;
var distanceBuffer = (double)classRoom.RangeInMeters;
var minutesBuffer = configuration.GetSection("App").GetSection("RegisterAttendance").GetSection("TimeBufferInMinutes").Value;
var distance = LogHelper.DistanceInMeters(thisLat, thisLon, data.GeoLat, data.GeoLon);
var enrollments = GetEnrollmentsForUserId(data.Attendance.StudentId, context);
if (distance > distanceBuffer)
{
valid = false;
error = "Your device is detected too far from the classroom!";
}
else if (TimeSpan.FromTicks(DateTime.Now.Ticks - data.SessionStartTimestamp).TotalMinutes > Convert.ToInt32(minutesBuffer))
{
valid = false;
error = $"It's been over {minutesBuffer} minutes since the beginning of the course";
}
else if (!enrollments.Any(e => e.CourseId == data.Attendance.CourseId))
{
valid = false;
error = $"You are not enrolled to {context.Courses.SingleOrDefault(c=>c.Id == data.Attendance.CourseId).Title}";
}
}
else
{
valid = false;
}
}
else
{
valid = false;
}
}
return(new AttendanceRegistrationDataValidationObject {
valid = valid,
error = error
});
}