From 8bde80a8cd1fb9b92f4867edbeeae48158f9036b Mon Sep 17 00:00:00 2001
From: Anton Tananaev <anton@traccar.org>
Date: Tue, 5 Jul 2022 16:43:42 -0700
Subject: Configurable altitude units

---
 modern/src/common/util/converter.js | 24 ++++++++++++++++++++++++
 modern/src/common/util/formatter.js | 11 ++++++++++-
 2 files changed, 34 insertions(+), 1 deletion(-)

(limited to 'modern/src/common/util')

diff --git a/modern/src/common/util/converter.js b/modern/src/common/util/converter.js
index 559e68aa..cb21566b 100644
--- a/modern/src/common/util/converter.js
+++ b/modern/src/common/util/converter.js
@@ -54,6 +54,30 @@ export const distanceFromMeters = (value, unit) => value * distanceConverter(uni
 
 export const distanceToMeters = (value, unit) => value / distanceConverter(unit);
 
+const altitudeConverter = (unit) => {
+  switch (unit) {
+    case 'ft':
+      return 3.28084;
+    case 'm':
+    default:
+      return 1;
+  }
+};
+
+export const altitudeUnitString = (unit, t) => {
+  switch (unit) {
+    case 'ft':
+      return t('sharedFeet');
+    case 'm':
+    default:
+      return t('sharedMeters');
+  }
+};
+
+export const altitudeFromMeters = (value, unit) => value * altitudeConverter(unit);
+
+export const altitudeToMeters = (value, unit) => value / altitudeConverter(unit);
+
 const volumeConverter = (unit) => {
   switch (unit) {
     case 'impGal':
diff --git a/modern/src/common/util/formatter.js b/modern/src/common/util/formatter.js
index 034b0401..f36b4d38 100644
--- a/modern/src/common/util/formatter.js
+++ b/modern/src/common/util/formatter.js
@@ -1,6 +1,13 @@
 import moment from 'moment';
 import {
-  distanceFromMeters, distanceUnitString, speedFromKnots, speedUnitString, volumeFromLiters, volumeUnitString,
+  altitudeFromMeters,
+  altitudeUnitString,
+  distanceFromMeters,
+  distanceUnitString,
+  speedFromKnots,
+  speedUnitString,
+  volumeFromLiters,
+  volumeUnitString,
 } from './converter';
 import { prefixString } from './stringUtils';
 
@@ -26,6 +33,8 @@ export const formatCourse = (value) => {
 
 export const formatDistance = (value, unit, t) => `${distanceFromMeters(value, unit).toFixed(2)} ${distanceUnitString(unit, t)}`;
 
+export const formatAltitude = (value, unit, t) => `${altitudeFromMeters(value, unit).toFixed(2)} ${altitudeUnitString(unit, t)}`;
+
 export const formatSpeed = (value, unit, t) => `${speedFromKnots(value, unit).toFixed(2)} ${speedUnitString(unit, t)}`;
 
 export const formatVolume = (value, unit, t) => `${volumeFromLiters(value, unit).toFixed(2)} ${volumeUnitString(unit, t)}`;
-- 
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