public ActionResult Index()
{
var model = new StudentPairingData {
Students = students
};
if (Request["PairStudents"] == "true")
{
var helper = new StudentPairingHelper();
model = helper.PairStudents(model);
}
return(View(model));
}
public StudentPairingData PairStudents(StudentPairingData input)
{
// Copy the input Students so we don't go deleting data
var unpairedStudents = new List <string>(input.Students);
var pairedStudents = new List <string>();
var random = new Random();
// Pair the students
for (int index = 0; index <= unpairedStudents.Count + 1; index++)
{
var first = unpairedStudents.First();
if (unpairedStudents.Count == 0)
{
break;
}
unpairedStudents.Remove(first);
var randomIndex = random.Next(0, unpairedStudents.Count);
var second = unpairedStudents[randomIndex];
unpairedStudents.Remove(second);
pairedStudents.Add($"{first} : {second}");
}
input.PairedStudents = pairedStudents;
if (unpairedStudents.Count > 0)
{
input.UnpairedStudent = unpairedStudents.First();
}
//input.PairedStudents = input.Students.Reverse().ToList();
// Assign the paired students to input.PairedStudents
// If there is a leftover, assign it to input.UnpairedStudent
return(input);
}