feat(ipinfo): support GeoIP (#26)

Co-authored-by: E99p1ant <[email protected]>

internal/ipinfo/ipinfo.go

@@ -0,0 +1,27 @@
+package ipinfo
+
+import (
+	"github.com/li4n0/revsuit/internal/ipinfo/geoip"
+	"github.com/li4n0/revsuit/internal/ipinfo/qqwry"
+	log "unknwon.dev/clog/v2"
+)
+
+var db Database
+
+func Area(ip string) string {
+	if db != nil {
+		return db.Area(ip)
+	}
+	return ""
+}
+
+func Init(config Config) {
+	switch config.Database {
+	case "qqwry":
+		db = qqwry.New()
+	case "geoip":
+		db = geoip.New(config.GeoLicenseKey)
+	default:
+		log.Fatal("wrong ip location database type: %q", config.Database)
+	}
+}