Added coordinates from City database

http/http.go

@@ -31,12 +31,15 @@ type Server struct {
 }
 
 type Response struct {
-	IP         net.IP   `json:"ip"`
-	IPDecimal  *big.Int `json:"ip_decimal"`
-	Country    string   `json:"country,omitempty"`
-	CountryISO string   `json:"country_iso,omitempty"`
-	City       string   `json:"city,omitempty"`
-	Hostname   string   `json:"hostname,omitempty"`
+	IP                net.IP   `json:"ip"`
+	IPDecimal         *big.Int `json:"ip_decimal"`
+	Country           string   `json:"country,omitempty"`
+	CountryISO        string   `json:"country_iso,omitempty"`
+	City              string   `json:"city,omitempty"`
+	Hostname          string   `json:"hostname,omitempty"`
+	IsInEuropeanUnion bool     `json:"is_in_european_union,omitempty"`
+	Latitude          float64  `json:"location_latitude,omitempty"`
+	Longitude         float64  `json:"location_longitude,omitempty"`
 }
 
 type PortResponse struct {
@@ -95,12 +98,15 @@ func (s *Server) newResponse(r *http.Request) (Response, error) {
 		hostname, _ = s.LookupAddr(ip)
 	}
 	return Response{
-		IP:         ip,
-		IPDecimal:  ipDecimal,
-		Country:    country.Name,
-		CountryISO: country.ISO,
-		City:       city,
-		Hostname:   hostname,
+		IP:                ip,
+		IPDecimal:         ipDecimal,
+		Country:           country.Name,
+		CountryISO:        country.ISO,
+		IsInEuropeanUnion: country.IsInEuropeanUnion,
+		City:              city.Name,
+		Hostname:          hostname,
+		Latitude:          city.Latitude,
+		Longitude:         city.Longitude,
 	}, nil
 }
 
@@ -158,6 +164,15 @@ func (s *Server) CLICityHandler(w http.ResponseWriter, r *http.Request) *appErro
 	return nil
 }
 
+func (s *Server) CLICoordinatesHandler(w http.ResponseWriter, r *http.Request) *appError {
+	response, err := s.newResponse(r)
+	if err != nil {
+		return internalServerError(err)
+	}
+	fmt.Fprintf(w, "%s, %s\n", formatCoordinate(response.Latitude), formatCoordinate(response.Longitude))
+	return nil
+}
+
 func (s *Server) JSONHandler(w http.ResponseWriter, r *http.Request) *appError {
 	response, err := s.newResponse(r)
 	if err != nil {
@@ -281,6 +296,7 @@ func (s *Server) Handler() http.Handler {
 		r.Route("GET", "/country", s.CLICountryHandler)
 		r.Route("GET", "/country-iso", s.CLICountryISOHandler)
 		r.Route("GET", "/city", s.CLICityHandler)
+		r.Route("GET", "/coordinates", s.CLICoordinatesHandler)
 	}
 
 	// Browser
@@ -297,3 +313,7 @@ func (s *Server) Handler() http.Handler {
 func (s *Server) ListenAndServe(addr string) error {
 	return http.ListenAndServe(addr, s.Handler())
 }
+
+func formatCoordinate(c float64) string {
+	return strconv.FormatFloat(c, 'f', 6, 64)
+}

http/http_test.go

@@ -20,7 +20,10 @@ func (t *testDb) Country(net.IP) (geo.Country, error) {
 	return geo.Country{Name: "Elbonia", ISO: "EB"}, nil
 }
 
-func (t *testDb) City(net.IP) (string, error) { return "Bornyasherk", nil }
+func (t *testDb) City(net.IP) (database.City, error) {
+	return database.City{Name: "Bornyasherk"}, nil
+}
+
 func (t *testDb) IsEmpty() bool               { return false }
 
 func testServer() *Server {

iputil/geo/geo.go

@@ -2,19 +2,27 @@ package geo
 
 import (
 	"net"
+	"math"
 
 	geoip2 "github.com/oschwald/geoip2-golang"
 )
 
 type Reader interface {
 	Country(net.IP) (Country, error)
-	City(net.IP) (string, error)
+	City(net.IP) (City, error)
 	IsEmpty() bool
 }
 
 type Country struct {
-	Name string
-	ISO  string
+	Name              string
+	ISO               string
+	IsInEuropeanUnion bool
+}
+
+type City struct {
+	Name      string
+	Latitude  float64
+	Longitude float64
 }
 
 type geoip struct {
@@ -62,21 +70,32 @@ func (g *geoip) Country(ip net.IP) (Country, error) {
 	if record.RegisteredCountry.IsoCode != "" && country.ISO == "" {
 		country.ISO = record.RegisteredCountry.IsoCode
 	}
+	country.IsInEuropeanUnion = record.Country.IsInEuropeanUnion
+	if record.RegisteredCountry.IsoCode != "" && country.ISO == "" {
+		country.IsInEuropeanUnion = record.RegisteredCountry.IsInEuropeanUnion
+	}
 	return country, nil
 }
 
-func (g *geoip) City(ip net.IP) (string, error) {
+func (g *geoip) City(ip net.IP) (City, error) {
+	city := City{}
 	if g.city == nil {
-		return "", nil
+		return city, nil
 	}
 	record, err := g.city.City(ip)
 	if err != nil {
-		return "", err
+		return city, err
 	}
-	if city, exists := record.City.Names["en"]; exists {
-		return city, nil
+	if c, exists := record.City.Names["en"]; exists {
+		city.Name = c
 	}
-	return "", nil
+	if !math.IsNaN(record.Location.Latitude) {
+		city.Latitude = record.Location.Latitude
+	}
+	if !math.IsNaN(record.Location.Longitude) {
+		city.Longitude = record.Location.Longitude
+	}
+	return city, nil
 }
 
 func (g *geoip) IsEmpty() bool {