/// <summary>
/// Check if this new shift occurs the next morning after a night shift or night before a morning shift
/// </summary>
/// <param name="newShift">The new shift</param>
/// <returns>true if it is consecutive overnight, false otherwise</returns>
public Shift ReturnConsecutiveOpenCloseShifts(Shift newShift)
{
bool checkYesterday = false;
// check if this is even a morning or night shift
if (!(newShift.StartTime <= TimeUtilities.ConvertToDateTime("0900") || newShift.EndTime >= TimeUtilities.ConvertToDateTime("2100")))
{
// not an opening or closing shift - return false
return(null);
}
// holds the target start and ened times
DateTime targetStart = newShift.StartTime;
DateTime targetEnd = newShift.EndTime;
// get the index of this shifts day
int index = TimeUtilities.daysOfWeek.IndexOf(newShift.Day);
int target = 0;
// get the target index of the day we wish to check
if (newShift.StartTime <= TimeUtilities.ConvertToDateTime("0900"))
{ // this shift is an opening shift
// we will need to check previous day
checkYesterday = true;
// increment target times by 1 day
targetStart = targetStart.AddDays(1);
targetEnd = targetEnd.AddDays(1);
// check if current index is monday
if (index == 0)
{
// set target to sunday
target = TimeUtilities.daysOfWeek.Count - 1;
}
else
{
// otherwise subtract 1
target = index - 1;
}
}
else if (newShift.EndTime >= TimeUtilities.ConvertToDateTime("2100"))
{// this shift is an opening shift
// we will check next day's shift
checkYesterday = false;
// increment target times by 1 day
targetStart.AddDays(-1);
targetEnd.AddDays(-1);
// check if current index is sunday
if (index == TimeUtilities.daysOfWeek.Count - 1)
{
// set target to monday
target = 0;
}
else
{
// otherwise add 1
target = index + 1;
}
}
else
{
// should be impossible to reach this point due to first if statement at top of method
throw new Exception("WTF?! How'd you get here?!?");
}
// do the actual checking
foreach (Shift shift in this._shiftsWorking._shifts[TimeUtilities.daysOfWeek[target]])
{
// if we're checking yesterday
if (checkYesterday)
{
TimeSpan difference = (targetStart - shift.EndTime);
// get time difference and see if it is at least or less than expected amount
if (difference <= new TimeSpan(11, 30, 0))
{
// these are consecutive shifts, return true
return(shift);
}
}
else
{ // we are checking tomorrow
// get time difference and see if it is at least or less than expected amount
if ((targetEnd - shift.StartTime) <= new TimeSpan(11, 30, 0))
{
// these are consecutive shifts, return true
return(shift);
}
}
}
// never found a conflicting shift
return(null);
}
