Minor refactor

- Separate function to find Unit symbol

widget/src/show_popup.rs

@@ -4,6 +4,15 @@ use slint::SharedString;
 
 slint::include_modules!();
 
+fn unit_symbol(units: &str) -> char {
+    match units {
+        "metric" => 'C',
+        "imperial" => 'F',
+        "standard" => 'K',
+        _ => '?',
+    }
+}
+
 pub fn show_popup(resp: &WeatherResponse, cfg: &Config) -> Result<(), Box<dyn std::error::Error>> {
     let ui = MainWindow::new()?;
 
@@ -22,12 +31,7 @@ pub fn show_popup(resp: &WeatherResponse, cfg: &Config) -> Result<(), Box<dyn st
     let temp = resp.main.as_ref().and_then(|m| m.temp).unwrap_or(0.0);
     let temperature = format!("{temp:.1}");
 
-    let unit = match cfg.query_params.units.as_str() {
+    let unit_symbol = unit_symbol(cfg.query_params.units.as_str());
-        "metric" => 'C',
-        "imperial" => 'F',
-        "standard" => 'K',
-        _ => '?',
-    };
 
     ui.set_city(SharedString::from(city));
     ui.set_country(SharedString::from(country));
@@ -35,7 +39,7 @@ pub fn show_popup(resp: &WeatherResponse, cfg: &Config) -> Result<(), Box<dyn st
     ui.set_weather_description(SharedString::from(weather_description));
     ui.set_weather_icon(SharedString::from(icon_to_nerd_font(&icon_code)));
     ui.set_temperature(SharedString::from(temperature));
-    ui.set_unit(SharedString::from(unit));
+    ui.set_unit(SharedString::from(unit_symbol));
 
     ui.run()?;
     Ok(())