private void SaveChanges()
{
var teacher = new AdministratorAddTeacherServiceModel()
{
FirstName = this.FirstName,
MiddleName = this.MiddleName,
LastName = this.LastName,
Town = this.Town,
Department = this.SelectedDepartment,
};
try
{
this.administratorAddTeacherService.AddTeacher(teacher);
this.ConfirmationMessages = string.Format(SUCCESSFULLY_ADDED_TEACHER, this.FirstName, this.MiddleName, this.LastName);
ResetViewFields();
}
catch (InvalidOperationException ioex)
{
this.ExceptionMessage = ioex.Message;
this.ConfirmationMessages = String.Empty;
}
}
public void AddTeacher(AdministratorAddTeacherServiceModel teacher)
{
ValidateTeacherInfo(teacher);
using (var data = new StudentSystemDbContext())
{
bool isTownExists = data.Towns
.Any(x => x.Name == teacher.Town);
if (!isTownExists)
{
data.Towns.Add(new Town()
{
Name = teacher.Town,
});
}
Town town = data.Towns
.FirstOrDefault(x => x.Name == teacher.Town);
Department department = data.Departments
.FirstOrDefault(x => x.Name == teacher.Department);
User user = new User()
{
UserName = string.Format(DEFAULT_USERNAME, teacher.FirstName),
Password = DEFAULT_PASSWORD,
FirstName = teacher.FirstName,
MiddleName = teacher.MiddleName,
LastName = teacher.LastName,
Town = town,
Department = department,
};
Teacher AddTeacher = new Teacher()
{
User = user,
};
data.Users.Add(user);
data.Teachers.Add(AddTeacher);
data.SaveChanges();
}
}
private void ValidateTeacherInfo(AdministratorAddTeacherServiceModel teacher)
{
StringBuilder exceptionMessages = new StringBuilder();
bool isValid = true;
if (teacher.FirstName == null ||
teacher.FirstName.Length < USER_FIRST_NAME_MIN_LENGTH ||
teacher.FirstName.Length > USER_FIRST_NAME_MAX_LENGTH)
{
exceptionMessages.AppendLine(INVALID_USER_FIRST_NAME_LENGTH_EXCEPTION_MESSAGE);
isValid = false;
}
if (teacher.MiddleName == null ||
teacher.MiddleName.Length < USER_MIDDLE_NAME_MIN_LENGTH ||
teacher.MiddleName.Length > USER_MIDDLE_NAME_MAX_LENGTH)
{
exceptionMessages.AppendLine(INVALID_USER_MIDDLES_NAME_LENGTH_EXCEPTION_MESSAGE);
isValid = false;
}
if (teacher.LastName == null ||
teacher.LastName.Length < USER_LAST_NAME_MIN_LENGTH ||
teacher.LastName.Length > USER_LAST_NAME_MAX_LENGTH)
{
exceptionMessages.AppendLine(INVALID_USER_LAST_NAME_LENGTH_EXCEPTION_MESSAGE);
isValid = false;
}
if (teacher.Town == null ||
teacher.Town.Length < TOWN_NAME_MIN_LENGTH ||
teacher.Town.Length > TOWN_NAME_MAX_LENGTH)
{
exceptionMessages.AppendLine(INVALID_TOWN_NAME_LENGTH_EXCEPTION_MESSAGE);
isValid = false;
}
if (!isValid)
{
throw new InvalidOperationException(exceptionMessages.ToString());
}
}
