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Found rule how four digit year are calculated from two digit years

This commit is contained in:
dankito 2024-09-10 18:03:20 +02:00
parent c158097d3a
commit 891641fc6f
1 changed files with 14 additions and 5 deletions
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19
fints4k/src/commonMain/kotlin/net/codinux/banking/fints/transactions/mt940/Mt940Parser.kt
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@ -53,8 +53,6 @@ open class Mt940Parser(
val DateFormatter = DateFormatter("yyMMdd") // TODO: replace with LocalDate.Format { } val DateFormatter = DateFormatter("yyMMdd") // TODO: replace with LocalDate.Format { }
val CurrentYearTwoDigit = LocalDate.todayAtEuropeBerlin().year
val CreditDebitCancellationRegex = Regex("C|D|RC|RD") val CreditDebitCancellationRegex = Regex("C|D|RC|RD")
val AmountRegex = Regex("\\d+,\\d*") val AmountRegex = Regex("\\d+,\\d*")
@ -455,12 +453,23 @@ open class Mt940Parser(
// this really simple date format on my own // this really simple date format on my own
if (dateString.length == 6) { if (dateString.length == 6) {
try { try {
var year = dateString.substring(0, 2).toInt() + 2000 var year = dateString.substring(0, 2).toInt()
val month = dateString.substring(2, 4).toInt() val month = dateString.substring(2, 4).toInt()
val day = dateString.substring(4, 6).toInt() val day = dateString.substring(4, 6).toInt()
if (year > CurrentYearTwoDigit + 1) { // should be rarely the case: years before 2000 /**
year -= 100 * Bei 6-stelligen Datumsangaben (d.h. JJMMTT) wird gemäß SWIFT zwischen dem 20. und 21.
* Jahrhundert wie folgt unterschieden:
* - Ist das Jahr (d.h. JJ) größer als 79, bezieht sich das Datum auf das 20. Jahrhundert. Ist
* das Jahr 79 oder kleiner, bezieht sich das Datum auf das 21. Jahrhundert.
* - Ist JJ > 79:JJMMTT = 19JJMMTT
* - sonst: JJMMTT = 20JJMMTT
* - Damit reicht die Spanne des sechsstelligen Datums von 1980 bis 2079.
*/
if (year > 79) {
year += 1900
} else {
year += 2000
} }
// ah, here we go, banks (in Germany) calculate with 30 days each month, so yes, it can happen that dates // ah, here we go, banks (in Germany) calculate with 30 days each month, so yes, it can happen that dates