ussd/internal/utils/age.go

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2024-08-26 12:37:54 +02:00
package utils
import "time"
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// 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.
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func CalculateAge(birthdate, today time.Time) int {
today = today.In(birthdate.Location())
ty, tm, td := today.Date()
today = time.Date(ty, tm, td, 0, 0, 0, 0, time.UTC)
by, bm, bd := birthdate.Date()
birthdate = time.Date(by, bm, bd, 0, 0, 0, 0, time.UTC)
if today.Before(birthdate) {
return 0
}
age := ty - by
anniversary := birthdate.AddDate(age, 0, 0)
if anniversary.After(today) {
age--
}
return age
}