Update Weather model

Author: angelabauer

lib/services/weather.dart

@@ -0,0 +1,33 @@
+class WeatherModel {
+  String getWeatherIcon(int condition) {
+    if (condition < 300) {
+      return '🌩';
+    } else if (condition < 400) {
+      return '🌧';
+    } else if (condition < 600) {
+      return '☔️';
+    } else if (condition < 700) {
+      return '☃️';
+    } else if (condition < 800) {
+      return '🌫';
+    } else if (condition == 800) {
+      return '☀️';
+    } else if (condition <= 804) {
+      return '☁️';
+    } else {
+      return '🤷‍';
+    }
+  }
+
+  String getMessage(int temp) {
+    if (temp > 25) {
+      return 'It\'s 🍦 time';
+    } else if (temp > 20) {
+      return 'Time for shorts and 👕';
+    } else if (temp < 10) {
+      return 'You\'ll need 🧣 and 🧤';
+    } else {
+      return 'Bring a 🧥 just in case';
+    }
+  }
+}