/// <summary>
/// Assigns students to rooms for the given course.
/// </summary>
/// <param name="course">
/// The course to schedule for.
/// </param>
/// <param name="courseStudents">
/// The students to try and assign.
/// </param>
/// <param name="availableFaculty">
/// Faculty members that are available for scheduling for this course.
/// </param>
/// <param name="labRoom">
/// If we're scheduling for labs.
/// </param>
/// <param name="classRoom">
/// If we're scheduling for class rooms.
/// </param>
/// <param name="instructRoom">
/// If we're scheduling for instructional rooms.
/// </param>
/// <returns>
/// A list of students that were unable to be scheduled.
/// </returns>
private List<Student> AssignStudents(Course course, List<Student> courseStudents, List<Faculty> availableFaculty, bool labRoom, bool classRoom, bool instructRoom, bool library)
{
int currentFacultyIndex = 0;
int requiredHours = course.Requirement.LabHr;
while (requiredHours > 0)
{
int assignedHours = requiredHours > 2 ? 2 : requiredHours;
// This is the confusing part, we can assign students across different hours if there's too many
// Now here's the confusing part, we locate a teacher and assign consecutive slots until there's no students
while (courseStudents.Count > 0)
{
// We can assign either 1 or 2 hour slots, so first see if we can find a 2 hour available lab
List<TimeSlot> availability = RequestAvailableRooms(course, labRoom, classRoom, instructRoom, library);
// Find the largest available room here
TimeSlot largest = FindLargestRoom(availability, courseStudents.Count, assignedHours);
// If there is no available slot, we're slightly screwed and will have to forget about scheduling the rest now
if (largest == null)
{
foreach (Student student in courseStudents)
{
if (!UnscheduledCourses.ContainsKey(student.StudentID))
UnscheduledCourses[student.StudentID] = new List<Course>();
UnscheduledCourses[student.StudentID].Add(course);
}
UpdateProgress(string.Format("Failed to schedule {0} students for course {1}", courseStudents.Count, course.Names));
return courseStudents;
}
// Our endDate is the start plus assigned hours
DateTime endDate = largest.Start.AddHours(assignedHours);
// We've got some slot available, ram everyone into it and keep going
Faculty teachingFaculty = availableFaculty[currentFacultyIndex++ % availableFaculty.Count];
Schedule newSchedule = new Schedule()
{
StartTime = largest.Start,
EndTime = endDate,
CourseID = course.CourseID,
RoomID = largest.TargetRoom.RoomID,
};
CurrentSchedules.Add(newSchedule);
Program.Database.Schedules.Add(newSchedule);
// Add the teaching faculty time first
FacultySchedule facultySchedule = new FacultySchedule()
{
StartTime = largest.Start,
FacultyID = teachingFaculty.FacultyID,
RoomID = largest.TargetRoom.RoomID,
Schedule = newSchedule,
};
Program.Database.FacultySchedules.Add(facultySchedule);
// Now assign all the students
int removedCount = largest.TargetRoom.Capacity > courseStudents.Count ? courseStudents.Count : largest.TargetRoom.Capacity;
List<Student> assignedStudents = courseStudents.GetRange(0, removedCount);
courseStudents.RemoveRange(0, removedCount);
foreach (Student student in assignedStudents)
{
StudentSchedule studentSchedule = new StudentSchedule()
{
StudentID = student.StudentID,
StartTime = largest.Start,
Schedule = newSchedule,
};
Program.Database.StudentSchedules.Add(studentSchedule);
}
}
requiredHours -= assignedHours;
}
if (courseStudents.Count != 0)
Console.WriteLine("DUH");
return courseStudents;
}
/// <summary>
/// Returns a list of time slots available for the given course under the restrictions that it should be a lab room,
/// class room, instructional room, etc.
/// </summary>
/// <param name="course">
/// The course to account for.
/// </param>
/// <param name="labRoom">
/// Should the room be a lab room?
/// </param>
/// <param name="classRoom">
/// Should the room be a class room?
/// </param>
/// <param name="instructRoom">
/// Should the room be an instructional room?
/// </param>
/// <returns>
/// A list of time slots representing available times at what rooms.
/// </returns>
private List<TimeSlot> RequestAvailableRooms(Course course, bool labRoom, bool classRoom, bool instructRoom, bool library)
{
List<TimeSlot> availableSlots = new List<TimeSlot>();
foreach (Room room in Program.Database.Rooms)
{
if ((room.RoomID != "Lib" && library) && (!room.Resource.Cad && course.Requirement.Cad) && (!room.Resource.Program && course.Requirement.Program)
&& (!room.Resource.Multi && course.Requirement.Multi) && (!room.Resource.Gaming && course.Requirement.Gaming))
continue;
if ((labRoom && !room.Resource.Lab) || (classRoom && !room.Resource.Classroom) || (instructRoom && !room.Resource.Instruct) || (library && !room.RoomID.Contains("Lib")))
continue;
// Figure out where existing schedule usages are
var usages = from schedule in CurrentSchedules
where schedule.RoomID == room.RoomID
select schedule;
// We don't care so much about what's already here, just flag it
RangedList<Room> usedSlots = new RangedList<Room>();
usedSlots.Payload = usedSlots.Payload.Distinct().ToList();
foreach (Schedule schedule in usages)
{
usedSlots.AddRange(schedule.StartTime, schedule.EndTime, room);
}
// We start on monday and blow through each day of the week, looking in 1-hour increments for available slots
DateTime startDate = StartDate();
for (int day = 0; day < 5; day++)
{
DateTime currentDate = startDate.AddDays(day).AddHours(8.335);
DateTime? openStart = currentDate;
for (int hour = 0; hour < 8; hour++)
{
// Is the current date available?
RangedList<Room>.PayloadIndex currentSlot = usedSlots.GetIndex(currentDate);
if (currentSlot != null)
{
// We've got to close an availability block
if (openStart != null && (DateTime)openStart != currentDate)
{
DateTime start = (DateTime)openStart;
DateTime end = currentDate;
// Record our availability range
TimeSlot newSlot = new TimeSlot()
{
Start = start,
End = end,
TargetRoom = room,
};
availableSlots.Add(newSlot);
}
openStart = null; // Not available, move along to the next hour
}
else
if (openStart == null)
openStart = currentDate;
currentDate = currentDate.AddHours(1);
}
// This will happen on our first pass because entire days are still available
if (openStart != null && (DateTime)openStart != currentDate)
{
DateTime start = (DateTime)openStart;
DateTime end = currentDate;
// Record our availability range
TimeSlot newSlot = new TimeSlot()
{
Start = start,
End = end,
TargetRoom = room,
};
availableSlots.Add(newSlot);
}
}
}
List<TimeSlot> result = availableSlots.Distinct().ToList();
return result;
}
