Moved GeoIP module to utils package

utils/geoip.go

@@ -0,0 +1,81 @@
+package utils
+
+import (
+	"net"
+	"fmt"
+
+	"github.com/oschwald/geoip2-golang"
+)
+
+func HandleGeoIPCommand(ipAddress string, dbCity string, dbASN string) (string, error) {
+	ip := net.ParseIP(ipAddress)
+
+	// Check if IP/Hostname is valid
+	if ip == nil {
+		resolvedIP, err := net.LookupIP(ipAddress)
+		if err != nil || len(resolvedIP) == 0 {
+			return "", fmt.Errorf("Invalid IP or hostname: %s", ipAddress)
+		}
+		ip = resolvedIP[0]
+	}
+
+	var (
+		city	= "N/A"
+		state	= "N/A"
+		country	= "N/A"
+		asn	= "N/A"
+		isp	= "N/A"
+	)
+
+	// Lookup City, State and Country info
+	if cityDb, err := geoip2.Open(dbCity); err == nil {
+		defer cityDb.Close()
+
+		if cityRecord, err := cityDb.City(ip); err == nil {
+			if name := cityRecord.City.Names["en"]; name != "" {
+				city = name
+			}
+
+			if len(cityRecord.Subdivisions) > 0 {
+				if name := cityRecord.Subdivisions[0].Names["en"]; name != "" {
+					state = name
+				}
+			}
+
+			if name := cityRecord.Country.Names["en"]; name != "" {
+				country = name
+			}
+		} else {
+			return "", fmt.Errorf("City Lookup error: %v", err)
+		}
+	} else {
+		return "", fmt.Errorf("Error opening City database: %v", err)
+	}
+
+	// Lookup ASN info
+	if asnDb, err := geoip2.Open(dbASN); err == nil {
+		defer asnDb.Close()
+
+		if asnRecord, err := asnDb.ASN(ip); err == nil {
+			if asnNum := asnRecord.AutonomousSystemNumber; asnNum != 0 {
+				asn = fmt.Sprintf("%d", asnNum)
+			}
+
+			if org := asnRecord.AutonomousSystemOrganization; org != "" {
+				isp = org
+			}
+		} else {
+			return "", fmt.Errorf("ASN lookup error: %v", err)
+		}
+	} else {
+		return "", fmt.Errorf("Error opening ASN database: %v", err)
+	}
+
+	// Format the response
+	response := fmt.Sprintf(
+		"IP: %s | Location: %s, %s, %s | ASN: %s | ISP: %s",
+		ip.String(), city, state, country, asn, isp,
+	)
+
+	return response, nil
+}