mapbox geocoding and reverse geocoding

Author: codingsince1985

.gitignore

@@ -0,0 +1 @@
+.idea/

README.md

@@ -29,6 +29,7 @@ import (
 	"github.com/codingsince1985/geo-golang/mapquest/nominatim"
 	"github.com/codingsince1985/geo-golang/mapquest/open"
 	"github.com/codingsince1985/geo-golang/opencage"
+	"github.com/codingsince1985/geo-golang/mapbox"
 )
 
 const addr = "Melbourne VIC"
@@ -52,6 +53,9 @@ func main() {
 
 	// Bing
 	try(bing.Geocoder("BING_KEY"))
+
+	// Mapbox
+	try(mapbox.Geocoder("YOUR_ACCESS_TOKEN"))
 }
 
 func try(geocoder geo.Geocoder) {
@@ -86,6 +90,10 @@ Address of (-37.816742,144.964463) is 40-44 Elizabeth St, Melbourne VIC 3000, Au
 // Bing
 Melbourne VIC location is {-37.82429885864258 144.97799682617188}
 Address of (-37.816742,144.964463) is 46 Elizabeth St, Melbourne, VIC 3000
+
+// Mapbox
+Melbourne VIC location is {-37.8142 144.9632}
+Address of (-37.816742,144.964463) is Bankwest ATM, 43-55 Elizabeth St, 3000 Melbourne, Australia
 ```
 License
 ==

mapbox/geocoder.go

@@ -0,0 +1,53 @@
+// Package mapbox is a geo-golang based Mapbox geocode/reverse geocode client
+package mapbox
+
+import (
+	"fmt"
+	"github.com/codingsince1985/geo-golang"
+	"strings"
+)
+
+type baseURL string
+
+type geocodeResponse struct {
+	Query []interface{}
+	Features []struct {
+		Place_Name string
+		Center [2]float64
+	}
+}
+
+// Geocoder constructs Mapbox geocoder
+func Geocoder(token string) geo.Geocoder {
+	return geo.Geocoder{
+		baseURL("https://api.mapbox.com/geocoding/v5/mapbox.places/*.json?access_token=" + token),
+		&geocodeResponse{},
+	}
+}
+
+func (b baseURL) GeocodeURL(address string) string {
+	return strings.Replace(string(b), "*", address, 1)
+}
+
+func (b baseURL) ReverseGeocodeURL(l geo.Location) string {
+	return strings.Replace(string(b), "*", fmt.Sprintf("%+f,%+f", l.Lng, l.Lat), 1)
+}
+
+func (r *geocodeResponse) Location() (l geo.Location) {
+	if len(r.Features) > 0 {
+		g := r.Features[0]
+		l = geo.Location{g.Center[1], g.Center[0]}
+	}
+	return
+}
+
+func (r *geocodeResponse) Address() (address string) {
+	if len(r.Features) > 0 {
+		address = r.Features[0].Place_Name
+	}
+	return
+}
+
+func (r *geocodeResponse) ResponseObject() geo.ResponseParser {
+	return r
+}

mapbox/geocoder_test.go

@@ -0,0 +1,33 @@
+package mapbox_test
+
+import (
+	"github.com/codingsince1985/geo-golang"
+	"github.com/codingsince1985/geo-golang/mapbox"
+	"strings"
+	"testing"
+)
+
+const token = "YOUR_ACCESS_TOKEN"
+
+var geocoder = mapbox.Geocoder(token)
+
+func TestGeocode(t *testing.T) {
+	location, err := geocoder.Geocode("Melbourne VIC")
+	if err != nil || location.Lat != -37.8142 || location.Lng != 144.9632 {
+		t.Error("TestGeocode() failed", err, location)
+	}
+}
+
+func TestReverseGeocode(t *testing.T) {
+	address, err := geocoder.ReverseGeocode(-37.8142, 144.9632)
+	if err != nil || !strings.HasSuffix(address, "Melbourne, Victoria 3000, Australia") {
+		t.Error("TestReverseGeocode() failed", err, address)
+	}
+}
+
+func TestReverseGeocodeWithNoResult(t *testing.T) {
+	_, err := geocoder.ReverseGeocode(-37.8142, 164.9632)
+	if err != geo.ErrNoResult {
+		t.Error("TestReverseGeocodeWithNoResult() failed", err)
+	}
+}