From 9ef862aa5d97ed24ffe2ca2c519d6fff7e3ee19c Mon Sep 17 00:00:00 2001
From: Serhiy Mytrovtsiy <mitrovtsiy@ukr.net>
Date: Tue, 15 Dec 2020 17:23:34 +0100
Subject: [PATCH] fix: system temperature units

---
 StatsKit/helpers.swift | 18 +++++++++++++++---
 1 file changed, 15 insertions(+), 3 deletions(-)

diff --git a/StatsKit/helpers.swift b/StatsKit/helpers.swift
index 16bf590f..ecd5c62a 100644
--- a/StatsKit/helpers.swift
+++ b/StatsKit/helpers.swift
@@ -656,6 +656,14 @@ public func LocalizedString(_ key: String, _ params: String..., comment: String
     return string
 }
 
+extension UnitTemperature {
+    static var current: UnitTemperature {
+        let measureFormatter = MeasurementFormatter()
+        let measurement = Measurement(value: 0, unit: UnitTemperature.celsius)
+        return measureFormatter.string(from: measurement) == "0°C" ? .celsius : .fahrenheit
+    }
+}
+
 public func Temperature(_ value: Double) -> String {
     let stringUnit: String = Store.shared.string(key: "temperature_units", defaultValue: "system")
     let formatter = MeasurementFormatter()
@@ -664,9 +672,13 @@ public func Temperature(_ value: Double) -> String {
     formatter.unitOptions = .providedUnit
     
     var measurement = Measurement(value: value, unit: UnitTemperature.celsius)
-    if stringUnit != "system" {
-        if let temperatureUnit = TemperatureUnits.first(where: { $0.key == stringUnit }), let unit = temperatureUnit.additional as? UnitTemperature {
-            measurement.convert(to: unit)
+    if stringUnit == "system" {
+        measurement.convert(to: UnitTemperature.current)
+    } else {
+        if let temperatureUnit = TemperatureUnits.first(where: { $0.key == stringUnit }) {
+            if let unit = temperatureUnit.additional as? UnitTemperature {
+                measurement.convert(to: unit)
+            }
         }
     }