refactor: restructure project

pkg/geoloc/static.go

@@ -1,22 +1,24 @@
 package geoloc
 
 import (
-	"fmt"
+	"errors"
 	"math"
 	"net"
 
 	"github.com/praserx/ipconv"
 )
 
-func GetIPInfo(ipaddress string) (uint, error) {
+var ErrNoValidIP = errors.New("no valid IP address")
+
+func CalculateIPNum(ipaddress string) (uint, error) {
 	ip := net.ParseIP(ipaddress)
 	if ip == nil {
-		return 0, fmt.Errorf("no valid IP address")
+		return 0, ErrNoValidIP
 	}
 	ipnum, err := ipconv.IPv4ToInt(ip)
 	if err != nil {
 		return 0, err
 	}
-	ipnumfrom := uint(math.Floor(float64(ipnum)/float64(256))) * 256
+	ipnumfrom := uint(math.Floor(float64(ipnum)/float64(CalculationValue))) * CalculationValue
 	return ipnumfrom, nil
 }