How to modify an existing Attribute's base code - acumatica

Question

In the timesheet code there is an attribute called PXWeekSelector2:
What I need to know is how to modify the code of this attribute in a customization project to increase the weekListCount variable to go over 1000 (ours is actually 800, from the year 2005 - which is why we've hit our limit).
Not sure how to override or modify an existing attribute. Any help would be appreciated.
Updated 4/28:
If I look at the PXWeekSelector2Attribute in the source code, this is what I see. I don't see any method like 'Prefetch':
namespace PX.Objects.EP
{
public class PXWeekSelector2Attribute : PXWeekSelectorAttribute
{
public PXWeekSelector2Attribute();
public static int GetNextWeekID(PXGraph graph, int weekID);
public static int GetNextWeekID(PXGraph graph, DateTime date);
public static DateTime GetWeekEndDate(PXGraph graph, int weekId);
public static int GetWeekID(PXGraph graph, DateTime date);
public static WeekInfo GetWeekInfo(PXGraph graph, int weekId);
public static DateTime GetWeekStartDate(PXGraph graph, int weekId);
public static bool IsCustomWeek(PXGraph graph);
protected override IEnumerable GetAllRecords();
public class FullWeekList
{
public FullWeekList();
public static List<EPWeekRaw> Weeks();
}
public class WeekInfo
{
public WeekInfo();
public DayInfo Mon { get; }
public DayInfo Tue { get; }
public DayInfo Wed { get; }
public DayInfo Thu { get; }
public DayInfo Fri { get; }
public DayInfo Sat { get; }
public DayInfo Sun { get; }
public Dictionary<DayOfWeek, DayInfo> Days { get; }
public void AddDayInfo(DateTime date);
public bool IsValid(DateTime date);
}
public class DayInfo
{
public DayInfo(DateTime? date);
public DateTime? Date { get; }
public bool Enabled { get; }
}
}
}

Answer 1

One way is to create your own version of the PXWeekSelector2Attribute where you will change the FullWeekList.Definition.Prefetch method to read as many records as you need like below
public void Prefetch()
{
DateTime curentDay = this._stratDay;
for (int i = 0; i < 1000; i++)
{
int year;
if (curentDay.AddDays(-3.0).Year < curentDay.Year && PXDateTimeInfo.GetWeekNumber(curentDay) > 1)
{
year = curentDay.AddYears(-1).Year;
}
else
{
year = curentDay.Year;
}
EPWeekRaw rawWeek = EPWeekRaw.ToEPWeekRaw(new PXWeekSelectorAttribute.EPWeek
{
WeekID = new int?(year * 100 + PXDateTimeInfo.GetWeekNumber(curentDay))
});
this._weeks.Add(rawWeek);
curentDay = curentDay.AddDays(7.0);
}
}
and copy almost all other methods and members of PXWeekSelector2Attribute and change them to work with your attribute's methods
protected override IEnumerable GetAllRecords()
{
if (PXWeekSelectorCustomAttribute.IsCustomWeek(this._Graph))
{
return (from _ in (PXResultset<EPCustomWeek>)PXSelectBase<EPCustomWeek, PXSelect<EPCustomWeek>.Config>.Select(this._Graph, null).AsEnumerable<PXResult<EPCustomWeek>>()
select EPWeekRaw.ToEPWeekRaw((EPCustomWeek)_)).ToList<EPWeekRaw>();
}
return PXWeekSelectorCustomAttribute.FullWeekList.Weeks();
}
And the last thing will be to overwrite the PXWeekSelector2Attribute with your PXWeekSelectorCustomAttribute using CacheAttached whereever you need.