weather: Refactor temperature type for type safety

There is now a Temperature struct in the weather service, which holds
the internal representation. There is also a temperature struct in the
Applications namespace, which holds the temperature in either Celsius or
Fahrenheit.

1 files changed, 13 insertions, 0 deletions

diff --git a/src/displayapp/Weather.cpp b/src/displayapp/Weather.cpp
new file mode 100644
index 00000000..a0f0a281
--- /dev/null
+++ b/src/displayapp/Weather.cpp
@@ -0,0 +1,13 @@
+#include "displayapp/Weather.h"
+
+using namespace Pinetime::Applications;
+
+Temperature Pinetime::Applications::Convert(Controllers::SimpleWeatherService::Temperature temp,
+                                            Controllers::Settings::WeatherFormat format) {
+  Temperature t = {temp.temp};
+  if (format == Controllers::Settings::WeatherFormat::Imperial) {
+    t.temp = t.temp * 9 / 5 + 3200;
+  }
+  t.temp = t.temp / 100 + (t.temp % 100 >= 50 ? 1 : 0);
+  return t;
+}