private static float GetUserWeight(string _user, Shift.UserShiftPreference _preference, int _hours)
{
// get the user
User user = GetUserByID(_user);
// TODO: Think of a better weight
return ((float)_preference) * (1 / ((_hours * user.HourlySalary) / user.MaxRevenue));
}
private static void CalculateShift(Shift _shift, ref Dictionary<string, int> _hours)
{
// variable to store the individual weights for each user
Dictionary<string, float> weightPerUser = new Dictionary<string, float>();
foreach(Shift.UserShift us in _shift.possibleUsers)
{
// check if the user is eligible for the shift
if(_shift.ShiftFaculty != GetUserByID(us.User).Faculty)
{
Debug.WriteLine("Faculty mismatch between User and Shift detected!");
continue;
}
// check if the user has no entry in the hours dictionary
if(!_hours.ContainsKey(us.User)) { _hours[us.User] = 0; }
// calculate the weight for the user and add it
weightPerUser.Add(us.User, GetUserWeight(us.User, us.Preference, _hours[us.User]));
}
// iterate over all keys
foreach(string key in weightPerUser.Keys.ToArray())
{
// check if the user has no weight
if(weightPerUser[key] <= 0.0f)
{
// remove the user
weightPerUser.Remove(key);
}
}
// check if there is anyone left to fill the shift
if(weightPerUser.Count == 0)
{
// TODO: Think of a better way to signal that nobody can take the shift
_shift.UserID = "NOONE";
return;
}
// get the user with the highest weight
KeyValuePair<string, float> p = weightPerUser.Max();
// set him as the one who will take the shift
_shift.UserID = p.Key;
// increase his time
_hours[p.Key] = _hours[p.Key] + _shift.Hours;
}