public Grade TryUpdateStudentGradeInCourse(int studentId, int courseId, GradeContract gradeContract,
out string message)
{
if (!Utilities.IsValidGradeContract(gradeContract, out message))
{
return(null);
}
try
{
var grade = _gradesRepository.GetGradeOfStudentInCourse(studentId, courseId);
if (grade == null)
{
message = "Student with matching id doesn't exist";
return(null);
}
grade.TestGrade = gradeContract.Grade;
return(_gradesRepository.UpdateStudentGradeInCourse(grade.Id, grade));
}
catch (DALException e)
{
// LOG
throw new BLException("There was a problem adding new student", e);
}
}
public static bool IsValidGradeContract(GradeContract gradeContract, out string message)
{
if (gradeContract.Grade > 100 || gradeContract.Grade < 0)
{
message = "Grade should be between 0 to 100";
return(false);
}
message = string.Empty;
return(true);
}
public IActionResult AddGrade(int studentId, int courseId, [FromBody] GradeContract gradeContract)
{
try
{
var grade = _businessLogic.TryAddGrade(studentId, courseId, gradeContract, out var message);
if (grade == null)
{
return(BadRequest(message));
}
return(Ok(grade));
}
catch (BLException e)
{
// Log here
return(StatusCode(StatusCodes.Status500InternalServerError, e.Message));
}
}
public Grade TryAddGrade(int studentId, int courseId, GradeContract gradeContract, out string message)
{
if (!Utilities.IsValidGradeContract(gradeContract, out message))
{
return(null);
}
try
{
var student = _studentRepository.GetStudentById(studentId);
if (student == null)
{
message = "Student with matching id doesn't exist";
return(null);
}
var course = _coursesRepository.GetCourseById(courseId);
if (course == null)
{
message = "Course with matching id doesn't exist";
return(null);
}
var studentInCourse = _studentInCourseRepository.GetOrCreateStudentInCourse(studentId, courseId);
var grade = new Grade
{
TestGrade = gradeContract.Grade,
StudentInCourseId = studentInCourse.Id
};
message = string.Empty;
return(_gradesRepository.AddGrade(grade));
}
catch (DALException e)
{
// LOG
throw new BLException("There was a problem adding new grade", e);
}
}
