From d33e94fda029e12f3b713a29081b477d6d15bc5c Mon Sep 17 00:00:00 2001
From: lash <dev@holbrook.no>
Date: Sun, 12 Jan 2025 09:04:51 +0000
Subject: [PATCH] Add person utils

---
 person/age.go  | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++
 person/name.go | 17 +++++++++++++++
 2 files changed, 73 insertions(+)
 create mode 100644 person/age.go
 create mode 100644 person/name.go

diff --git a/person/age.go b/person/age.go
new file mode 100644
index 0000000..c6ccda2
--- /dev/null
+++ b/person/age.go
@@ -0,0 +1,56 @@
+package person
+
+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.
+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
+}
+
+// CalculateAgeWithYOB calculates the age based on the given year of birth (YOB).
+// 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
+	}
+
+}
diff --git a/person/name.go b/person/name.go
new file mode 100644
index 0000000..4418149
--- /dev/null
+++ b/person/name.go
@@ -0,0 +1,17 @@
+package person
+
+func ConstructName(firstName, familyName, defaultValue string) string {
+	name := defaultValue
+	if familyName != defaultValue {
+		if firstName != defaultValue {
+			name = firstName + " " + familyName
+		} else {
+			name = familyName
+		}
+	} else {
+		if firstName != defaultValue {
+			name = firstName
+		}
+	}
+	return name
+}