Switch to simpler temperature interface

src/components/ble/SimpleWeatherService.cpp

@@ -42,9 +42,9 @@ namespace {
     std::memcpy(cityName.data(), &dataBuffer[16], 32);
     cityName[32] = '\0';
     return SimpleWeatherService::CurrentWeather(ToUInt64(&dataBuffer[2]),
-                                                SimpleWeatherService::Temperature {ToInt16(&dataBuffer[10])},
-                                                SimpleWeatherService::Temperature {ToInt16(&dataBuffer[12])},
-                                                SimpleWeatherService::Temperature {ToInt16(&dataBuffer[14])},
+                                                SimpleWeatherService::Temperature(ToInt16(&dataBuffer[10])),
+                                                SimpleWeatherService::Temperature(ToInt16(&dataBuffer[12])),
+                                                SimpleWeatherService::Temperature(ToInt16(&dataBuffer[14])),
                                                 SimpleWeatherService::Icons {dataBuffer[16 + 32]},
                                                 std::move(cityName));
   }
@@ -56,8 +56,8 @@ namespace {
     const uint8_t nbDaysInBuffer = dataBuffer[10];
     const uint8_t nbDays = std::min(SimpleWeatherService::MaxNbForecastDays, nbDaysInBuffer);
     for (int i = 0; i < nbDays; i++) {
-      days[i] = SimpleWeatherService::Forecast::Day {SimpleWeatherService::Temperature {ToInt16(&dataBuffer[11 + (i * 5)])},
-                                                     SimpleWeatherService::Temperature {ToInt16(&dataBuffer[13 + (i * 5)])},
+      days[i] = SimpleWeatherService::Forecast::Day {SimpleWeatherService::Temperature(ToInt16(&dataBuffer[11 + (i * 5)])),
+                                                     SimpleWeatherService::Temperature(ToInt16(&dataBuffer[13 + (i * 5)])),
                                                      SimpleWeatherService::Icons {dataBuffer[15 + (i * 5)]}};
     }
     return SimpleWeatherService::Forecast {timestamp, nbDays, days};
@@ -98,9 +98,9 @@ int SimpleWeatherService::OnCommand(struct ble_gatt_access_ctxt* ctxt) {
         currentWeather = CreateCurrentWeather(dataBuffer);
         NRF_LOG_INFO("Current weather :\n\tTimestamp : %d\n\tTemperature:%d\n\tMin:%d\n\tMax:%d\n\tIcon:%d\n\tLocation:%s",
                      currentWeather->timestamp,
-                     currentWeather->temperature,
-                     currentWeather->minTemperature,
-                     currentWeather->maxTemperature,
+                     currentWeather->temperature.PreciseCelsius(),
+                     currentWeather->minTemperature.PreciseCelsius(),
+                     currentWeather->maxTemperature.PreciseCelsius(),
                      currentWeather->iconId,
                      currentWeather->location.data());
       }
@@ -112,8 +112,8 @@ int SimpleWeatherService::OnCommand(struct ble_gatt_access_ctxt* ctxt) {
         for (int i = 0; i < 5; i++) {
           NRF_LOG_INFO("\t[%d] Min: %d - Max : %d - Icon : %d",
                        i,
-                       forecast->days[i].minTemperature,
-                       forecast->days[i].maxTemperature,
+                       forecast->days[i].minTemperature.PreciseCelsius(),
+                       forecast->days[i].maxTemperature.PreciseCelsius(),
                        forecast->days[i].iconId);
         }
       }
@@ -154,14 +154,13 @@ std::optional<SimpleWeatherService::Forecast> SimpleWeatherService::GetForecast(
 }
 
 bool SimpleWeatherService::CurrentWeather::operator==(const SimpleWeatherService::CurrentWeather& other) const {
-  return this->iconId == other.iconId && this->temperature.temp == other.temperature.temp && this->timestamp == other.timestamp &&
-         this->maxTemperature.temp == other.maxTemperature.temp && this->minTemperature.temp == other.maxTemperature.temp &&
+  return this->iconId == other.iconId && this->temperature == other.temperature && this->timestamp == other.timestamp &&
+         this->maxTemperature == other.maxTemperature && this->minTemperature == other.maxTemperature &&
          std::strcmp(this->location.data(), other.location.data()) == 0;
 }
 
 bool SimpleWeatherService::Forecast::Day::operator==(const SimpleWeatherService::Forecast::Day& other) const {
-  return this->iconId == other.iconId && this->maxTemperature.temp == other.maxTemperature.temp &&
-         this->minTemperature.temp == other.maxTemperature.temp;
+  return this->iconId == other.iconId && this->maxTemperature == other.maxTemperature && this->minTemperature == other.maxTemperature;
 }
 
 bool SimpleWeatherService::Forecast::operator==(const SimpleWeatherService::Forecast& other) const {

src/components/ble/SimpleWeatherService.h

@@ -61,8 +61,33 @@ namespace Pinetime {
         Unknown = 255
       };
 
-      struct Temperature {
-        int16_t temp;
+      class Temperature {
+      public:
+        explicit Temperature(int16_t raw = 0) : raw {raw} {
+        }
+
+        [[nodiscard]] int16_t PreciseCelsius() const {
+          return raw;
+        }
+
+        [[nodiscard]] int16_t PreciseFahrenheit() const {
+          return raw * 9 / 5 + 3200;
+        }
+
+        [[nodiscard]] int16_t Celsius() const {
+          return (PreciseCelsius() + 50) / 100;
+        }
+
+        [[nodiscard]] int16_t Fahrenheit() const {
+          return (PreciseFahrenheit() + 50) / 100;
+        }
+
+        bool operator==(const Temperature& other) const {
+          return raw == other.raw;
+        }
+
+      private:
+        int16_t raw;
       };
 
       using Location = std::array<char, 33>; // 32 char + \0 (end of string)