/// <summary>
/// Creator: Jordan Lindo
/// Created: 4/27/2020
/// Approver: Chase Schulte
///
/// List Shuffle method.
/// </summary>
/// <remarks>
/// Updater: NA
/// Updated: NA
/// Update: NA
///
/// </remarks>
/// <param name="list"></param>
/// <returns></returns>
private List <PUUserVMAvailability> listShuffle(List <PUUserVMAvailability> list)
{
Random random = new Random();
int number = list.Count;
int sides = 2;
int chance = random.Next(sides);
if (number > 2 || chance > 0)
{
while (number > 1)
{
int randInt = random.Next(number);
number--;
PUUserVMAvailability temp = list[randInt];
list[randInt] = list[number];
list[number] = temp;
}
}
return(list);
}
/// <summary>
/// Creator: Jordan Lindo
/// Created: 4/23/2020
/// Approver: Chase Schulte
///
/// Method for generating a schedule
/// </summary>
/// <remarks>
/// Updater: Jordan Lindo
/// Updated: 4/28/2020
/// Update: Added limit to the number allowed.
///
/// </remarks>
/// <param name="date"></param>
/// <param name="lines"></param>
/// <returns></returns>
public ScheduleVM GenerateSchedule(DateTime date, List <BaseScheduleLine> lines)
{
ScheduleVM schedule = new ScheduleVM();
schedule.ScheduleLines = new List <ShiftUserVM>();
int daysInSchedule = 14;
schedule.StartDate = date;
schedule.EndDate = date.AddDays(daysInSchedule);
_openPositions = new List <OpenPosition>();
// List for storing which employee is scheduled by day
List <List <int> > employeeIDsInSchedule = new List <List <int> >();
// List for recording the count of hours for each employee;
_employeeHours = new List <PUUserVMHours>();
try
{
int scheduleCount = _scheduleAccessor.GetCountOfActiveSchedules();
if (scheduleCount < 4)
{
// A loop for repeating for each day in the schedule.
for (int i = 0; i < daysInSchedule; i++)
{
// The list representing the day of the week
employeeIDsInSchedule.Add(new List <int>());
// A loop to work through a base schedule
foreach (BaseScheduleLine line in lines)
{
// Skip if none are needed.
if (line.Count > 0)
{
// Get a list of possible choices.
List <PUUserVMAvailability> shuffle = _scheduleAccessor.GetListOfAvailableEmployees(date.AddDays(i), line);
List <PUUserVMAvailability> avaliable = listShuffle(shuffle);
// Skip if no choices are available.
if (avaliable != null && avaliable.Count > 0)
{
PetUniverseShiftTime shiftTime = _shiftTimeAccessor.SelectShiftTimeByID(line.ShiftTimeID);
DateTime shiftStart = DateTime.Parse(shiftTime.StartTime);
DateTime shiftEnd = DateTime.Parse(shiftTime.EndTime);
TimeSpan shiftLength = shiftEnd - shiftStart;
double minimumHoursToWork = 6;
bool end = false;
// A loop for the number of positions to fill.
for (int j = line.Count; j > 0 && !end; j--)
{
bool found = false;
int index = 0;
PUUserVMAvailability candidate = avaliable[index];
PUUserVMAvailability chosen = null;
int next = index;
do
{
// Check if the candidate is already scheduled on a day.
if (!employeeIDsInSchedule[i].Contains(candidate.PUUserID))
{
DateTime availabilityStart = DateTime.Parse(candidate.Availability.StartTime);
DateTime availabilityEnd = DateTime.Parse(candidate.Availability.EndTime);
TimeSpan availableLength = availabilityEnd.Subtract(availabilityStart);
// Short availabilities will be skipped.
if (availableLength.TotalHours >= minimumHoursToWork)
{
// If the shift start time is after or equal to the availability start time.
if (shiftStart.CompareTo(availabilityStart) >= 0)
{
// If the shift end time is after or equal with the availability end time.
if (shiftEnd.CompareTo(availabilityEnd) >= 0)
{
// If the diference between availability start and
if (availabilityEnd.Subtract(shiftStart).TotalHours >= minimumHoursToWork)
{
shiftEnd = availabilityEnd;
found = true;
}
}
else
{
found = true;
}
}
// Checks if the person is available for enough of the shift to be scheduled.
else if ((shiftEnd.Subtract(availabilityStart)).TotalHours >= minimumHoursToWork)
{
shiftStart = availabilityStart;
found = true;
}
if (found)
{
bool allowed = true;
// A loop to see if a person is already scheduled the current day.
foreach (PUUserVMHours userVMHours in _employeeHours)
{
// If the person is found on the current day
if (userVMHours.PUUserID.Equals(candidate.PUUserID))
{
// If the date is in the first week
if (i < (daysInSchedule / 2))
{
// Check if the user is already scheduled for 40 hours
if (userVMHours.Week1Hours >= 40)
{
allowed = false;
}
}
else
{
if (userVMHours.Week2Hours >= 40)
{
allowed = false;
}
}
}
}
// If the user hasn't already been scheduled for 40 hours in a week.
if (allowed)
{
// UserId is added to the list of people scheduled on a day.
employeeIDsInSchedule[i].Add(candidate.PUUserID);
chosen = candidate;
bool inList = false;
// Loop to see if a corresponding user is in the list of hours.
foreach (PUUserVMHours userVMHours in _employeeHours)
{
// If user matches an member
if (userVMHours.PUUserID.Equals(chosen.PUUserID))
{
inList = true;
// Find which week's total hours to update
if (i < (daysInSchedule / 2))
{
userVMHours.Week1Hours += (decimal)(shiftEnd.Subtract(shiftStart)).TotalHours;
}
else
{
userVMHours.Week2Hours += (decimal)(shiftEnd.Subtract(shiftStart)).TotalHours;
}
}
}
if (!inList)
{
// Build a new userVMHours add the hours to the correct week.
PUUserVMHours userVMHours = new PUUserVMHours
{
PUUserID = chosen.PUUserID,
Email = chosen.Email,
FirstName = chosen.FirstName,
LastName = chosen.LastName
};
if (i < (daysInSchedule / 2))
{
userVMHours.Week1Hours += (decimal)(shiftEnd.Subtract(shiftStart)).TotalHours;
userVMHours.Week2Hours = 0;
}
else
{
userVMHours.Week1Hours = 0;
userVMHours.Week2Hours += (decimal)(shiftEnd.Subtract(shiftStart)).TotalHours;
}
_employeeHours.Add(userVMHours);
}
}
// If it was found, but failed to meet the alternate requirements set found back to false.
else
{
found = false;
}
}
}
}
// Move to the next list item.
next++;
if (next != avaliable.Count)
{
candidate = avaliable[next];
}
// Decide if the loop continues
} while (!found && next < avaliable.Count);
// If an appropriate user was found a shift is added to the schedule.
if (found)
{
schedule.ScheduleLines.Add(new ShiftUserVM
{
ShiftTimeID = line.ShiftTimeID,
ShiftDate = date.AddDays(i),
RoleID = line.ERoleID,
EmployeeID = chosen.PUUserID,
EmployeeName = chosen.LastName + ", " + chosen.FirstName,
ShiftStart = shiftStart.ToShortTimeString(),
ShiftEnd = shiftEnd.ToShortTimeString()
});
}
// If no users were available the openings are recorded in the open positions list.
else
{
_openPositions.Add(new OpenPosition
{
ERoleID = line.ERoleID,
count = j
});
// To prevent more checks for this baseSchedule line based on the remaining count.
end = true;
}
}
}
}
}
}
}
else
{
throw new ApplicationException("That schedule is too far in the future.");
}
}
catch (Exception ex)
{
throw ex;
}
return(schedule);
}