GREG-171: Having cutoff date for when to attempt suggestion

frontend/src/utils/index.ts

@@ -240,11 +240,26 @@ export function isFemaleBasedOnNationalId(nationalId: string): boolean {
   return parseInt(nationalId.charAt(8), 10) % 2 === 0
 }
 
+/**
+ * The ID-number format is scheduled to change in the future:
+ * https://www.skatteetaten.no/deling/opplysninger/folkeregisteropplysninger/pid/
+ *
+ * Do not attempt a suggestion if we are at the time when the format will change.
+ */
+function shouldAttemptSuggestion(): boolean {
+  const currentYear = getYear(new Date())
+
+  // Keeping it simple, if this code is still running and should be revised.
+  // The new numbers are scheduled to appear in 2032
+  return currentYear <= 2031
+}
+
 export function extractGenderOrBlank(nationalId?: string): string {
   if (
     nationalId == null ||
     nationalId === '' ||
-    isValidFnr(nationalId) !== true
+    isValidFnr(nationalId) !== true ||
+    !shouldAttemptSuggestion()
   ) {
     return ''
   }
@@ -300,7 +315,8 @@ export function extractBirthdateFromNationalId(
   if (
     nationalId == null ||
     nationalId === '' ||
-    isValidFnr(nationalId) !== true
+    isValidFnr(nationalId) !== true ||
+    !shouldAttemptSuggestion()
   ) {
     return null
   }