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- /*
- * File......: ACCTWEEK.PRG
- * Author....: Jo W. French dba Practical Computing
- * CIS ID....: 74731,1751
- * Date......: $Date: 15 Aug 1991 23:02:38 $
- * Revision..: $Revision: 1.2 $
- * Log file..: $Logfile: E:/nanfor/src/acctweek.prv $
- *
- * The functions contained herein are the original work of Jo W. French
- * and are placed in the public domain.
- *
- * Modification history:
- * ---------------------
- *
- * $Log: E:/nanfor/src/acctweek.prv $
- *
- * Rev 1.2 15 Aug 1991 23:02:38 GLENN
- * Forest Belt proofread/edited/cleaned up doc
- *
- * Rev 1.1 14 Jun 1991 19:50:46 GLENN
- * Minor edit to file header
- *
- * Rev 1.0 01 Apr 1991 01:00:28 GLENN
- * Nanforum Toolkit
- *
- */
-
- /* $DOC$
- * $FUNCNAME$
- * FT_ACCTWEEK()
- * $CATEGORY$
- * Date/Time
- * $ONELINER$
- * Return accounting week data
- * $SYNTAX$
- * FT_ACCTWEEK( [ <dGivenDate> ], [ <nWeekNum> ] ) -> aDateInfo
- * $ARGUMENTS$
- * <dGivenDate> is any valid date in any date format. Defaults
- * to current system date if not supplied.
- *
- * <nWeekNum> is a number from 1 to 52 signifying a week.
- * Defaults to current week if not supplied.
- * $RETURNS$
- * A three element array containing the following data:
- *
- * aDateInfo[1] - The year and week as a character string "YYYYWW"
- * aDateInfo[2] - The beginning date of the accounting week
- * aDateInfo[3] - The ending date of the accounting week
- * $DESCRIPTION$
- * FT_ACCTWEEK() returns an array containing data about the
- * accounting week containing the given date.
- *
- * An accounting period has the following characteristics:
- *
- * If the first week of the period contains 4 or more 'work'
- * days, it is included in the period; otherwise, the first
- * week was included in the prior period.
- *
- * If the last week of the period contains 4 or more 'work'
- * days it is included in the period; otherwise, the last week
- * is included in the next period. This results in 13 week
- * 'quarters' and 4 or 5 week 'months'. Every 5 or 6 years, a
- * 'quarter' will contain 14 weeks and the year will contain 53
- * weeks.
- * $EXAMPLES$
- * // get info about accounting week containing 9/15/90
- * aDateInfo := FT_ACCTWEEK( CTOD("09/15/90") )
- * ? aDateInfo[1] // 199037 (37th week)
- * ? aDateInfo[2] // 09/09/90 beginning of week 37
- * ? aDateInfo[3] // 09/15/90 end of week 37
- *
- * // get info about accounting week 25 in year containing 9/15/90
- * aDateInfo := FT_ACCTWEEK( CTOD("09/15/90"), 25 )
- * ? aDateInfo[1] // 199025
- * ? aDateInfo[2] // 06/17/89 beginning of week 25
- * ? aDateInfo[3] // 06/23/90 end of week 25
- * $SEEALSO$
- * FT_DATECNFG() FT_ACCTMONTH() FT_ACCTQTR() FT_ACCTYEAR()
- * $END$
- */
-
- FUNCTION FT_ACCTWEEK(dGivenDate,nWeekNum)
-
- LOCAL nTemp, lIsWeek, aRetVal
-
- IF ! VALTYPE(dGivenDate) $ 'ND'
- dGivenDate := DATE()
- ELSEIF VALTYPE(dGivenDate) == 'N'
- nWeekNum := dGivenDate
- dGivenDate := DATE()
- ENDIF
-
- lIsWeek := IF(VALTYPE(nWeekNum) != 'N', .F., .T.)
-
- aRetVal := FT_ACCTYEAR(dGivenDate)
-
- IF lIsWeek
- nTemp := INT( (aRetVal[3] - aRetVal[2]) / 7 ) + 1
- nWeekNum := IF(nWeekNum > 0 .AND. nWeekNum <= nTemp , ;
- nWeekNum, nTemp)
- dGivenDate := aRetVal[2] + (nWeekNum - 1) * 7
- ENDIF
-
- aRetVal[1] += PADL(LTRIM(STR(INT( (dGivenDate - ;
- aRetVal[2]) / 7 ) + 1, 2)), 2, '0')
- dGivenDate += ( 6 - FT_DAYTOBOW(dGivenDate) ) // end of week
- aRetVal[2] := dGivenDate - 6
- aRetVal[3] := dGivenDate
-
- RETURN aRetVal
-