/// <summary>
/// Gets students but also does filtering query on them
/// </summary>
/// <param name="courseName"></param>
/// <param name="sorting">Choose either Filtering or Ordering</param>
/// <param name="criteria">Filtering - by performance, Sorting - Ascending, Descending</param>
/// <param name="takeNumber">Amount of items to take</param>
public void GetAllStudentsFromCourse(string courseName, SortingOperation sorting, string criteria = null, int takeNumber = -1)
{
if (sorting == SortingOperation.None)
{
GetAllStudentsFromCourse(courseName);
}
else if (IsQueryForCoursePossible(courseName))
{
//Extract the student names and their marks
var studentsWithMarks = courses[courseName].StudentsByName.ToDictionary(k => k.Key, v => v.Value.MarksByCourseName[courseName]);
if (sorting == SortingOperation.Filter)
{
studentsWithMarks = filter.FilterAndTake(studentsWithMarks, criteria, takeNumber) as Dictionary <string, double>;
}
else if (sorting == SortingOperation.Order)
{
studentsWithMarks = sorter.OrderAndTake(studentsWithMarks, criteria, takeNumber) as Dictionary <string, double>;
}
if (studentsWithMarks is null)
{
return;
}
foreach (var student in studentsWithMarks)
{
OutputWriter.PrintStudent(student);
}
}
}
public void FilterAndTake(string courseName, string givenFilter, int?studentsToTake = null)
{
if (IsQueryForCoursePossible(courseName))
{
if (studentsToTake == null)
{
studentsToTake = this.courses[courseName].StudentsByName.Count;
}
var grades = this.courses[courseName].StudentsByName
.ToDictionary(x => x.Key, x => x.Value.GradesByCourseName[courseName]);
filter.FilterAndTake(grades, givenFilter, studentsToTake.Value);
}
}
public void FilterAndTake(string courseName, string givenFilter, int?studentsToTake = null)
{
if (IsQueryForCoursePossible(courseName))
{
if (studentsToTake == null)
{
studentsToTake = courses[courseName].StudentsByName.Count;
}
Dictionary <string, double> marks = courses[courseName].StudentsByName.ToDictionary(x => x.Key, x => x.Value.MarksByCourseName[courseName]);
filter.FilterAndTake(marks, givenFilter, studentsToTake.Value);
}
}
