From 9588956fd2c94bf45341265433a6a5c6f18321db Mon Sep 17 00:00:00 2001
From: mmadfox <sergey.liskonog@gmail.com>
Date: Mon, 11 Sep 2023 05:47:25 +0300
Subject: [PATCH] feat: add center() method for geo.bbox

---
 geo/geo.go            | 17 ++++++++++++++++-
 random/latlon_test.go | 15 +++++++++++++++
 2 files changed, 31 insertions(+), 1 deletion(-)

diff --git a/geo/geo.go b/geo/geo.go
index 514250f..25d00d8 100644
--- a/geo/geo.go
+++ b/geo/geo.go
@@ -1,6 +1,9 @@
 package geo
 
-import "math"
+import (
+	"fmt"
+	"math"
+)
 
 const (
 	earthRadius = 6371e3
@@ -15,6 +18,11 @@ type LatLonPoint struct {
 	Lon float64
 }
 
+func (s LatLonPoint) String() string {
+	return fmt.Sprintf("Point{Lon: %f, Lat: %f}",
+		s.Lon, s.Lat)
+}
+
 type BBox struct {
 	MinLon float64
 	MinLat float64
@@ -28,3 +36,10 @@ func (b BBox) In(pt LatLonPoint) bool {
 		b.MaxLon >= pt.Lon &&
 		b.MaxLat >= pt.Lat
 }
+
+func (b BBox) Center() LatLonPoint {
+	return LatLonPoint{
+		Lat: (b.MinLat + b.MaxLat) / 2.0,
+		Lon: (b.MinLon + b.MaxLon) / 2.0,
+	}
+}
diff --git a/random/latlon_test.go b/random/latlon_test.go
index 07fd29a..b8ab5c2 100644
--- a/random/latlon_test.go
+++ b/random/latlon_test.go
@@ -181,3 +181,18 @@ func TestLatLon(t *testing.T) {
 		require.True(t, bbox.In(pt))
 	}
 }
+
+func TestBBoxCenter(t *testing.T) {
+	bbox := geo.BBox{
+		MinLon: 1.213284,
+		MinLat: 18.600047,
+		MaxLon: 11.587763,
+		MaxLat: 25.518278,
+	}
+	expected := geo.LatLonPoint{
+		Lat: 22.0591625,
+		Lon: 6.4005235,
+	}
+	center := bbox.Center()
+	require.Equal(t, expected, center)
+}