Merge pull request #20 from warahiko/feature/fetch_with_json

詳細な予報結果の表示

lib/forecast.dart

@@ -1,19 +1,25 @@
-enum Forecast {
-  sunny(image: 'assets/sunny.svg'),
-  cloudy(image: 'assets/cloudy.svg'),
-  rainy(image: 'assets/rainy.svg'),
-  ;
+import 'dart:convert';
 
+import 'package:flutter_training/weather.dart';
+
+class Forecast {
   const Forecast({
-    required this.image,
+    required this.weather,
+    required this.maxTemperature,
+    required this.minTemperature,
   });
 
-  factory Forecast.from(String name) {
-    return Forecast.values.singleWhere(
-      (element) => element.name == name,
-      orElse: () => throw Exception('No enum value for `$name`.'),
+  factory Forecast.from(String jsonString) {
+    final decoded = jsonDecode(jsonString) as Map<String, dynamic>;
+
+    return Forecast(
+      weather: Weather.from(decoded['weather_condition'] as String),
+      minTemperature: decoded['min_temperature'] as int,
+      maxTemperature: decoded['max_temperature'] as int,
     );
   }
 
-  final String image;
+  final Weather weather;
+  final int maxTemperature;
+  final int minTemperature;
 }

lib/forecast_view.dart

@@ -10,6 +10,12 @@ class ForecastView extends StatelessWidget {
 
   final Forecast? _forecast;
 
+  String _toTemperatureString(int? temperature) {
+    final temperatureValue =
+        temperature == null ? '**' : temperature.toString();
+    return '$temperatureValue ℃';
+  }
+
   @override
   Widget build(BuildContext context) {
     final theme = Theme.of(context);
@@ -21,14 +27,14 @@ class ForecastView extends StatelessWidget {
           aspectRatio: 1,
           child: _forecast == null
               ? const Placeholder()
-              : SvgPicture.asset(_forecast.image),
+              : SvgPicture.asset(_forecast.weather.image),
         ),
         const SizedBox(height: 16),
         Row(
           children: [
             Expanded(
               child: Text(
-                '** ℃',
+                _toTemperatureString(_forecast?.minTemperature),
                 style: labelLarge.copyWith(
                   color: Colors.blue,
                 ),
@@ -37,7 +43,7 @@ class ForecastView extends StatelessWidget {
             ),
             Expanded(
               child: Text(
-                '** ℃',
+                _toTemperatureString(_forecast?.maxTemperature),
                 style: labelLarge.copyWith(
                   color: Colors.red,
                 ),

lib/main_screen.dart

@@ -1,4 +1,5 @@
 import 'dart:async';
+import 'dart:convert';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_training/forecast.dart';
@@ -18,9 +19,15 @@ class _MainScreenState extends State<MainScreen> {
   Forecast? _forecast;
 
   void _fetchForecast() {
+    const request = {
+      'area': 'tokyo',
+      'date': '2023-11-22T00:00:00+09:00',
+    };
+    final requestString = jsonEncode(request);
+
     final Forecast newForecast;
     try {
-      newForecast = Forecast.from(_yumemiWeather.fetchThrowsWeather('tokyo'));
+      newForecast = Forecast.from(_yumemiWeather.fetchWeather(requestString));
     } on YumemiWeatherError catch (e) {
       unawaited(_showErrorDialog(e.toMessage()));
       return;

lib/weather.dart

@@ -0,0 +1,19 @@
+enum Weather {
+  sunny(image: 'assets/sunny.svg'),
+  cloudy(image: 'assets/cloudy.svg'),
+  rainy(image: 'assets/rainy.svg'),
+  ;
+
+  const Weather({
+    required this.image,
+  });
+
+  factory Weather.from(String name) {
+    return Weather.values.singleWhere(
+      (element) => element.name == name,
+      orElse: () => throw Exception('No enum value for `$name`.'),
+    );
+  }
+
+  final String image;
+}