add function to check validity of provided yob

internal/utils/age.go

@@ -1,6 +1,9 @@
 package utils
 
-import "time"
+import (
+	"strconv"
+	"time"
+)
 
 // CalculateAge calculates the age based on a given birthdate and the current date in the format dd/mm/yy
 // It adjusts for cases where the current date is before the birthday in the current year.
@@ -25,11 +28,29 @@ func CalculateAge(birthdate, today time.Time) int {
 // It subtracts the YOB from the current year to determine the age.
 //
 // Parameters:
+//
 //	yob: The year of birth as an integer.
 //
 // Returns:
+//
 //	The calculated age as an integer.
 func CalculateAgeWithYOB(yob int) int {
 	currentYear := time.Now().Year()
 	return currentYear - yob
 }
+
+
+//IsValidYob checks if the provided yob can be considered valid 
+func IsValidYOb(yob string) bool {
+	currentYear := time.Now().Year()
+	yearOfBirth, err := strconv.ParseInt(yob, 10, 64)
+	if err != nil {
+		return false
+	}
+	if yearOfBirth >= 1900 && int(yearOfBirth) <= currentYear {
+		return true
+	} else {
+		return false
+	}
+
+}