1 files changed, 18 insertions, 6 deletions
diff --git a/web/app/store/TimeUnits.js b/web/app/store/TimeUnits.js
index efcf1d66..0d16c4bb 100644
--- a/web/app/store/TimeUnits.js
+++ b/web/app/store/TimeUnits.js
@@ -1,5 +1,5 @@
 /*
- * Copyright 2015 Anton Tananaev (anton@traccar.org)
+ * Copyright 2015 - 2017 Anton Tananaev (anton@traccar.org)
  *
  * This program is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
@@ -17,16 +17,28 @@
 
 Ext.define('Traccar.store.TimeUnits', {
     extend: 'Ext.data.Store',
-    fields: ['name', 'factor'],
+    fields: ['key', 'name', 'factor'],
 
     data: [{
-        name: Strings.sharedSecond,
+        key: 's',
+        name: Strings.sharedSecondAbbreviation,
         factor: 1
     }, {
-        name: Strings.sharedMinute,
+        key: 'm',
+        name: Strings.sharedMinuteAbbreviation,
         factor: 60
     }, {
-        name: Strings.sharedHour,
+        key: 'h',
+        name: Strings.sharedHourAbbreviation,
         factor: 3600
-    }]
+    }],
+
+    convertValue: function (value, unit, back) {
+        var model;
+        if (!unit) {
+            unit = 'kn';
+        }
+        model = this.findRecord('key', unit);
+        return back ? value * model.get('factor') : value / model.get('factor');
+    }
 });