Add endpoint for fetching address from coordinates

main.go

@@ -8,6 +8,7 @@ import (
 	"googlemaps.github.io/maps"
 	"log"
 	"net/http"
+	"strconv"
 	"strings"
 )
 
@@ -21,6 +22,10 @@ type location struct {
 	Long float64 `json:"longitude"`
 }
 
+type address struct {
+	Address string `json:"address"`
+}
+
 type distance struct {
 	Text string `json:"text"`
 	Value int `json:"value"`
@@ -60,6 +65,7 @@ func main() {
 	}
 
 	http.HandleFunc("/latlong/", makeHandler(handleLatLongRequest, client))
+	http.HandleFunc("/address/", makeHandler(handleAddressRequest, client))
 	http.HandleFunc("/distance/", makeHandler(handleDistanceMatrixRequest, client))
 	log.Fatal(http.ListenAndServe(fmt.Sprintf(":%d", cfg.Port), nil))
 }
@@ -82,7 +88,7 @@ func handleDistanceMatrixRequest(w http.ResponseWriter, r *http.Request, client
 	}
 
 	if result, err := client.DistanceMatrix(context.Background(), req); err != nil {
-		log.Fatalf("fatal error: %s", err)
+		log.Fatalf("matrix fatal error: %s", err)
 		w.WriteHeader(400)
 	} else {
 		res := distanceResponse{}
@@ -114,6 +120,31 @@ func handleDistanceMatrixRequest(w http.ResponseWriter, r *http.Request, client
 	}
 }
 
+func handleAddressRequest(w http.ResponseWriter, r *http.Request, client *maps.Client) {
+	p := strings.Split(r.URL.Path[len("/address/"):], ",")
+	lat, _ := strconv.ParseFloat(p[0], 64)
+	lng, _ := strconv.ParseFloat(p[1], 64)
+	req := &maps.GeocodingRequest{
+		LatLng: &maps.LatLng{Lat: lat, Lng: lng},
+	}
+	if result, err := client.Geocode(context.Background(), req); err != nil {
+		log.Fatalf("fatal error: %s", err)
+		w.WriteHeader(400)
+	} else {
+		if len(result) > 0 {
+			l := address{
+				Address:          result[0].FormattedAddress,
+			}
+			if response, err := json.Marshal(l); err != nil {
+				log.Fatalf("fatal error: %s", err)
+				w.WriteHeader(404)
+			} else {
+				_, _ = w.Write(response)
+			}
+		}
+	}
+}
+
 func handleLatLongRequest(w http.ResponseWriter, r *http.Request, client *maps.Client) {
 	req := &maps.GeocodingRequest{
 		Address:      r.URL.Path[len("/latlong/"):],