private void ValidateCourseInfo(AdministratorCourseServiceModel course)
{
StringBuilder exceptionMessages = new StringBuilder();
bool isValid = true;
using (var data = new StudentSystemDbContext())
{
bool isCourseExists = data.Courses
.Any(x => x.Name == course.Name);
if (isCourseExists)
{
exceptionMessages.AppendLine(string.Format(COURSE_EXISTS_EXCEPTION_MESSAGE, course.Name));
isValid = false;
}
}
if (course.Name == null || course.Name.Length < COURSE_NAME_MIN_LENGTH || course.Name.Length > COURSE_NAME_MAX_LENGTH)
{
exceptionMessages.AppendLine(INVALID_COURSE_NAME_LENGTH_EXCEPTION_MESSAGE);
isValid = false;
}
bool isValidStartDate = DateTime.TryParseExact(course.StartDate,
STRING_DATE_FORMAT, CultureInfo.InvariantCulture, DateTimeStyles.None, out _);
if (!isValidStartDate)
{
exceptionMessages.AppendLine(string.Format(INVALID_START_DATE_EXCEPTION_MESSAGE, course.StartDate));
isValid = false;
}
bool isValidEndDate = DateTime.TryParseExact(course.EndDate,
STRING_DATE_FORMAT, CultureInfo.InvariantCulture, DateTimeStyles.None, out _);
if (!isValidEndDate)
{
exceptionMessages.AppendLine(string.Format(INVALID_END_DATE_EXCEPTION_MESSAGE, course.EndDate));
isValid = false;
}
bool isValidExamDate = DateTime.TryParseExact(course.ExamDate,
STRING_DATE_FORMAT, CultureInfo.InvariantCulture, DateTimeStyles.None, out _);
if (!isValidExamDate)
{
exceptionMessages.AppendLine(string.Format(INVALID_EXAM_DATE_EXCEPTION_MESSAGE, course.ExamDate));
isValid = false;
}
if (!isValid)
{
throw new InvalidOperationException(exceptionMessages.ToString());
}
}
public void SaveCourse(AdministratorCourseServiceModel inputCourseInfo)
{
ValidateCourseInfo(inputCourseInfo);
using (var data = new StudentSystemDbContext())
{
Course course = new Course()
{
Name = inputCourseInfo.Name,
StartDate = DateTime.ParseExact(inputCourseInfo.StartDate, STRING_DATE_FORMAT, CultureInfo.InvariantCulture),
EndDate = DateTime.ParseExact(inputCourseInfo.EndDate, STRING_DATE_FORMAT, CultureInfo.InvariantCulture),
ExamDate = DateTime.ParseExact(inputCourseInfo.ExamDate, STRING_DATE_FORMAT, CultureInfo.InvariantCulture),
};
data.Courses.Add(course);
data.SaveChanges();
}
}
private void SaveChanges()
{
var course = new AdministratorCourseServiceModel()
{
Name = this.CourseName,
StartDate = this.StartDate,
EndDate = this.EndDate,
ExamDate = this.ExamDate,
};
try
{
this.administratorCoursesService.SaveCourse(course);
this.ConfirmationMessages = string.Format(SUCCESSFULLY_ADDED_COURSE, this.CourseName);
ResetViewFields();
}
catch (InvalidOperationException ioex)
{
this.ExceptionMessage = ioex.Message;
this.ConfirmationMessages = String.Empty;
}
}
