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[jina_weekNum]

Linkjina_weekNum
AuthorJolle Carlestam
CategoryDate
Version8.x
LicensePublic Domain
Posted05 Feb 2008
Updated05 Feb 2008
More by this author...

Description

Returns the fiscal week number (ISO) of a given date, datevalue needs to be a valid Lasso date. First day of week is presumed to be Monday. The tag return the correct ISO week number contrary to Lasso own date -> week as of version 8.X.

Sample Usage

jina_weekNum(date);

Source Code

Click the "Download" button below to retrieve a copy of this tag, including the complete documentation and sample usage shown on this page. Place the downloaded ".inc" file in your LassoStartup folder, restart Lasso, and you can begin using this tag immediately.

 type != 'date';
		#date = (date: #date, -format='%Y-%m-%d');
	/if;

	if:#date -> type != 'date';
		Fail: 8020, 'Submitted date not of date type';
	/if;


	Local:'theDate' = (local:'date') + (Duration:7200);

	Local:'theYear' = (#theDate->Year);

	Local:'firstDateofYear' = (Date:-Month = 1, -Day = 1, -Year = #theYear, -Time = '04:00:00');
	Local:'firstDayofYear' = (#firstDateofYear->DayOfWeek);

	if:(#firstDayofYear <= 5) && (#firstDayofYear != 1);
		Local:'startDate'= (Date_Subtract:(#firstDateofYear), -Day = (#firstDayofYear - 2));
	else: (#firstDayofYear == 1);
		Local:'startDate' = (Date_Add:(#firstDateofYear), -Day = (1));
	else;
		Local:'startDate' = (Date_Add:(#firstDateofYear), -Day = (9 - #firstDayofYear));
	/if;

	Local:'DayinWeek' = (#theDate->DayOfWeek);

	if:(#DayinWeek != 1);
		Local:'firstDateinWeek' = (Date_Subtract:(#theDate), -Day = (#DayinWeek - 2));
	else;
		Local:'firstDateinWeek' = (Date_Subtract:(#theDate), -Day = 6);
	/if;

	Local:'theWeeksBetween' = (Date_Difference:#firstDateinWeek, #startDate, -Week) + 1;

	if:#theWeeksBetween == 0;
		#theWeeksBetween = jina_weekNum:(Date_Subtract:(#theDate), -Day = 1);
	/if;

	if:(#theWeeksBetween == 53) && ((date:#firstDateinWeek) >= (Date:-Month = 12, -Day = 29, -Year = #theYear, -Time = '04:00:00'));
		#theWeeksBetween = 1;
	/if;

	Return: #theWeeksBetween;

/Define_Tag;
	
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