private IEnumerable <VacationDay> GetRandomDays(int month, int year, List <Employee> employees)
{
if (employees == null)
{
throw new ArgumentNullException(nameof(employees));
}
var avaliableHolidayDays = AvaliableHolidayDays;
var numberOfDaysInMonth = DateTime.DaysInMonth(year, month);
var generatedVacationDays = new List <VacationDay>();
foreach (var employee in employees)
{
var employeeHolidayDays = new List <DateTime>();
while (avaliableHolidayDays > 0)
{
var rnd = new Random();
var rndDay = rnd.Next(1, numberOfDaysInMonth);
var randomDay = new DateTime(year, month, rndDay);
// Condition when employee can't go to work
if ((randomDay.DayOfWeek != DayOfWeek.Sunday) && (randomDay.DayOfWeek != DayOfWeek.Saturday) &&
!Holidays.Exists(x => x == randomDay) && !employeeHolidayDays.Exists(x => x == randomDay))
{
employeeHolidayDays.Add(randomDay);
// Employee cannot be twice on the single day at work.
if (generatedVacationDays.Exists(x => x.Day == randomDay) &&
(generatedVacationDays.Where(x => x.Day == randomDay).FirstOrDefault().Employees.Count <
MaxNumberOfPersonOnVacationPerDay))
{
generatedVacationDays.Where(x => x.Day == randomDay)
.FirstOrDefault()
.Employees.Add(employee);
avaliableHolidayDays--;
}
else if (!generatedVacationDays.Exists(x => x.Day == randomDay))
{
generatedVacationDays.Add(new VacationDay
{
Day = randomDay,
Employees = new List <Employee> {
employee
}
});
avaliableHolidayDays--;
}
}
}
avaliableHolidayDays = 2;
}
return(generatedVacationDays);
}
private List <WorkingDay> GetWorkingDays(Tuple <int, int, Calendar <VacationDay> > vacationCalendar)
{
var numberOfDays = DateTime.DaysInMonth(vacationCalendar.Item2, vacationCalendar.Item1);
var currentDayCounter = 1;
var workingCalendar = new List <WorkingDay>();
var dutiesEmployee = new Dictionary <Employee, int>();
foreach (var employee in Employess)
{
dutiesEmployee.Add(employee, 0);
}
while (currentDayCounter <= numberOfDays)
{
var currentDay = new DateTime(vacationCalendar.Item2, vacationCalendar.Item1, currentDayCounter);
if ((currentDay.DayOfWeek == DayOfWeek.Sunday) || (currentDay.DayOfWeek == DayOfWeek.Saturday) ||
Holidays.Exists(x => x == currentDay))
{
workingCalendar.Add(new WorkingDay
{
Day = currentDay,
IsVacation = true
});
}
else
{
var availableEmployees = new List <Employee>();
var employeeOnHolidayInCurrentDay =
vacationCalendar.Item3.Days.FirstOrDefault(y => y.Day == currentDay);
foreach (var employee in Employess)
{
if ((employeeOnHolidayInCurrentDay == null) ||
!employeeOnHolidayInCurrentDay.Employees.Exists(x => x == employee))
{
availableEmployees.Add(employee);
}
}
// Smallest number of duties
var potentialCandidates = GetPotentialCandidates(availableEmployees, dutiesEmployee);
var rnd = new Random();
var randomEmployeeId = rnd.Next(potentialCandidates.Count);
var potentialEmployeeForWorking = potentialCandidates[randomEmployeeId];
if (currentDayCounter > NumberOfEmployeeDutiesPerWeek)
{
var checkIfEmployeeWorkSecondDay =
workingCalendar.Exists(
x => (x.Day == currentDay.AddDays(-1)) && (x.Employee == potentialEmployeeForWorking));
var checkIfEmployeeWorkThirdTimes =
workingCalendar.Exists(
x => (x.Day == currentDay.AddDays(-2)) && (x.Employee == potentialEmployeeForWorking));
if (checkIfEmployeeWorkSecondDay == false)
{
workingCalendar.Add(new WorkingDay
{
Day = currentDay,
Employee = potentialEmployeeForWorking,
IsVacation = false
});
dutiesEmployee[potentialEmployeeForWorking]++;
}
else if (checkIfEmployeeWorkThirdTimes && (potentialCandidates.Count == 1))
{
workingCalendar.Add(new WorkingDay
{
Day = currentDay,
Employee = potentialEmployeeForWorking,
IsVacation = false
});
}
else
{
potentialEmployeeForWorking =
potentialCandidates.FirstOrDefault(x => x.Id != potentialEmployeeForWorking.Id);
workingCalendar.Add(new WorkingDay
{
Day = currentDay,
Employee = potentialEmployeeForWorking,
IsVacation = false
});
if (potentialEmployeeForWorking != null)
{
dutiesEmployee[potentialEmployeeForWorking]++;
}
}
}
else
{
workingCalendar.Add(new WorkingDay
{
Day = currentDay,
Employee = potentialEmployeeForWorking,
IsVacation = false
});
dutiesEmployee[potentialEmployeeForWorking]++;
}
}
currentDayCounter++;
}
return(workingCalendar);
}