public bool SaveCourse(Course course)
{
try
{
CourseGetway courseGetway = new CourseGetway();
if (IsValidCourseCode(course.Code))
{
throw new Exception("Course code already exist.");
}
else
{
if (IsValidCourseName(course.Name))
{
throw new Exception("Course name already exist.");
}
else
{
return(courseGetway.SaveCourse(course));
}
}
}
catch (Exception)
{
throw;
}
}
public bool AssignCourseTeacher(CourseTeacher courseTeacher)
{
try
{
if (IsCourseTeacherPairExist(courseTeacher))
{
throw new Exception("This course already assigned to this teacher.");
}
else
{
if (IsCourseAssign(courseTeacher.CourseId))
{
throw new Exception("Course already assigned.");
}
else
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.AssignCourseTeacher(courseTeacher));
}
}
}
catch (Exception)
{
throw;
}
}
public Course GetCourseById(int id)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.GetCourseById(id));
}
catch (Exception)
{
throw;
}
}
public List <Course> GetAllCourse()
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.GetAllCourse());
}
catch (Exception)
{
throw;
}
}
private bool IsValidCourseName(string courseName)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.IsValidCourseName(courseName));
}
catch (Exception)
{
throw;
}
}
public bool UnassignCourses()
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.UnassignCourses());
}
catch (Exception)
{
throw;
}
}
public List <CourseTeacherSemestersView> GetCourseTeacherSemesters()
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.GetCourseTeacherSemesters());
}
catch (Exception)
{
throw;
}
}
public bool DeleteCourseTeacher(int id, int cid, int tid)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.DeleteCourseTeacher(id, cid, tid));
}
catch (Exception)
{
throw;
}
}
public bool UpdateCourseTeacher(CourseTeacher courseTeacher)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.UpdateCourseTeacher(courseTeacher));
}
catch (Exception)
{
throw;
}
}
public CourseTeacher GetCourseCourseTeacherById(int id, int cid, int tid)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.GetCourseCourseTeacherById(id, cid, tid));
}
catch (Exception)
{
throw;
}
}
public bool IsCourseTeacherPairExist(CourseTeacher courseTeacher)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.IsCourseTeacherPairExist(courseTeacher));
}
catch (Exception)
{
throw;
}
}
private bool IsCourseAssign(int courseId)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.IsCourseAssign(courseId));
}
catch (Exception)
{
throw;
}
}
public bool DeleteCourse(int id)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.DeleteCourse(id));
}
catch (Exception)
{
throw;
}
}
public bool UpdateCourse(Course course)
{
try
{
CourseGetway courseGetway = new CourseGetway();
return(courseGetway.UpdateCourse(course));
}
catch (Exception)
{
throw;
}
}
public CourseManager()
{
courseGetway = new CourseGetway();
}
