//only for seed(),on data validation here
public int addCourseToStudents(String courseName, String studentName, int grade)
{
int courseIndex = courses.FindIndex(i => i.courseName == courseName);
int studentIndex = students.FindIndex(i => i.name == studentName);
CourseToStudent courseToStudent = new CourseToStudent(students[studentIndex], courses[courseIndex], grade);
courseToStudents.Add(courseToStudent);
return(0);
}
//enroll a student in a course
public int enrollStudent(String studentName, String courseName)
{
int studentIndex = students.FindIndex(i => i.name == studentName);
int courseIndex = courses.FindIndex(i => i.courseName == courseName);
//check if the student adn course exist
if (studentIndex == -1)
{
Console.WriteLine("Student " + studentName + " doesn't exist, please add the student first");
return(-1);
}
if (courseIndex == -1)
{
Console.WriteLine("Course " + courseName + " doesn't exist, please add the course first");
return(-1);
}
//check the credit limit
List <CourseToStudent> result = courseToStudents.FindAll(i => (i.student.name == studentName));
int currentCredit = result.Sum(i => i.course.credit);
int courseCredit = courses.Find(i => (i.courseName == courseName)).credit;
if (currentCredit + courseCredit <= students[studentIndex].creditLimit)
{
//check the course max student limit
int enrolledNumber = courseToStudents.FindAll(i => (i.course.courseName == courseName)).Count;
if (courses[courseIndex].maxStudent >= (enrolledNumber + 1))
{
CourseToStudent courseToStudent = new CourseToStudent(students[studentIndex], courses[courseIndex]);
courseToStudents.Add(courseToStudent);
return(0);
}
else
{
Console.WriteLine("Coures " + courseName + "is going to exceed its max student limit ", courses[courseIndex].maxStudent);
return(-1);
}
}
else
{
Console.WriteLine("Student " + studentName + "is going to exceed his/her credit limit", students[studentIndex].creditLimit);
return(-1);
}
}