/// <summary>
/// Update the risk factor in the student's retention history
/// </summary>
/// <param name="s"> The Student </param>
/// <param name="factorChange"> How much is the factor changing </param>
/// <param name="reason"> Why is the factor changing </param>
public void UpdateStudentHistory(Student s, double factorChange, string reason)
{
factorChange = Math.Abs(factorChange);
var sh = _studenthistory.All().SingleOrDefault(x => x.StudentID == s.ID && x.Date == DateTime.Today);
if (sh == null)
{
StudentHistory sh2 = new StudentHistory
{
StudentID = s.ID,
Date = DateTime.Today,
RiskFactor = s.RiskFactor,
DeltaReason = reason,
MaxFactor = factorChange
};
_studenthistory.Add(sh2);
_uow.Save();
}
else
{
sh.RiskFactor = s.RiskFactor;
if (factorChange >= sh.MaxFactor)
{
sh.MaxFactor = factorChange;
sh.DeltaReason = reason;
}
_uow.Save();
}
}
public async Task DeleteStudentAsync(string id)
{
var hist = new StudentHistory(HistoryEvent.Delete, id);
await _studentRepository.SentStudentInactiveAsync(id);
await _studentHistoryRepository.AddHistory(hist);
}
public async Task UpdateStudentAsync(Student s)
{
var hist = new StudentHistory(HistoryEvent.Update, s.StudentId);
await _studentRepository.UpdateStudentAsync(s);
await _studentHistoryRepository.AddHistory(hist);
}
public async Task CreateStudentAsync(Student student)
{
var hist = new StudentHistory(HistoryEvent.Add, student.StudentId);
await _studentRepository.CreateStudentAsync(student);
await _studentHistoryRepository.AddHistory(hist);
}
/// <summary>
/// Cast StudentHistory to StudentHistoryDTO
/// </summary>
/// <param name="sh"></param>
/// <returns></returns>
public StudenthistoryDTO Studenthistory2StudenthistoryDTO(StudentHistory sh)
{
return(new StudenthistoryDTO
{
StudentID = sh.StudentID,
Date = sh.Date,
RiskFactor = sh.RiskFactor,
DeltaReason = sh.DeltaReason,
MaxFactor = sh.MaxFactor
});
}
public static int AddStudentHistory(StudentHistory studentHistory)
{
//create DBContext object
using (var smsDB = new SMSEntities())
{
//Add Student object into Students DBset
smsDB.StudentHistories.Add(studentHistory);
// call SaveChanges method to save student into database
return(smsDB.SaveChanges());
}
}
public async Task LogStudentOut(string id, DateTime?differentDate = null)
{
var hist = new StudentHistory(HistoryEvent.Logout, id);
if (differentDate != null)
{
hist.TimeOfEvent = differentDate.Value;
}
await _studentRepository.LogStudentOut(id);
await _studentHistoryRepository.AddHistory(hist);
}
public async Task AddHistory(StudentHistory history)
{
await _studentHistoryContext.StudentHistory
.InsertOneAsync(history);
}
/// <summary>
/// 获取某一个聚合id下的所有事件，也就是得到了历史记录
/// </summary>
/// <param name="id"></param>
/// <returns></returns>
public IList <StudentHistoryData> GetAllHistory(Guid id)
{
return(StudentHistory.ToJavaScriptCustomerHistory(_eventStoreRepository.All(id)));
}
