From 58ea1d59b1ec71d61a088a7b9a87da7ae28279dd Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?France=CC=81=20Wilke?= <francewilke@gmail.com>
Date: Wed, 19 Apr 2023 12:28:23 +0200
Subject: [PATCH] Add GetDistanceInKmBetweenCoordinates and Concat functions
---
address_utils/address_utils.go | 21 +++++++++++++++++++++
string_utils/string_utils.go | 14 ++++++++++++++
2 files changed, 35 insertions(+)
diff --git a/address_utils/address_utils.go b/address_utils/address_utils.go
index a1f2730..b90563d 100644
--- a/address_utils/address_utils.go
+++ b/address_utils/address_utils.go
@@ -3,6 +3,7 @@ package address_utils
import (
"crypto/md5"
"fmt"
+ "math"
"regexp"
"strings"
@@ -275,3 +276,23 @@ func GetZoneDisplayName(zone string) string {
return zone
}
+
+func GetDistanceInKmBetweenCoordinates(lat1 float64, lng1 float64, lat2 float64, lng2 float64) float64 {
+ radlat1 := float64(math.Pi * lat1 / 180)
+ radlat2 := float64(math.Pi * lat2 / 180)
+
+ theta := float64(lng1 - lng2)
+ radtheta := float64(math.Pi * theta / 180)
+
+ dist := math.Sin(radlat1)*math.Sin(radlat2) + math.Cos(radlat1)*math.Cos(radlat2)*math.Cos(radtheta)
+ if dist > 1 {
+ dist = 1
+ }
+
+ dist = math.Acos(dist)
+ dist = dist * 180 / math.Pi
+ dist = dist * 60 * 1.1515
+
+ // Return in kilometers
+ return dist * 1.609344
+}
diff --git a/string_utils/string_utils.go b/string_utils/string_utils.go
index b649cc2..9b4cafe 100644
--- a/string_utils/string_utils.go
+++ b/string_utils/string_utils.go
@@ -151,6 +151,20 @@ func ConcatP(args ...*string) string {
return s
}
+// Concat concatenates all specified non-empty strings with ", " separators
+func Concat(args []string, separator string) string {
+ s := ""
+ for _, arg := range args {
+ if arg != "" {
+ if s != "" {
+ s += separator
+ }
+ s += arg
+ }
+ }
+ return s
+}
+
func ToJSONString(object interface{}) (string, error) {
jsonBytes, err := json.Marshal(&object)
if err != nil {
--
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