Implement plug table

frontend/lib/devices.dart

@@ -16,7 +16,25 @@ class Category {
     if (response.statusCode == 200) {
       List<Category> categories = [];
 
-      Map<String, Map<String, dynamic>> json = jsonDecode(response.body);
+      Map<String, List<Map<String, dynamic>>> json = jsonDecode(response.body);
+
+      for (MapEntry<String, List<Map<String, dynamic>>> category_entry
+          in json.entries) {
+        Category category = Category(category_entry.key);
+
+        for (Map<String, dynamic> device_map in category_entry.value) {
+          Device device = Device(
+              device_map["device_id"],
+              device_map["device_descriptor"],
+              device_map["led"],
+              device_map["power"],
+              device_map["power_draw"]);
+
+          category.devices.add(device);
+        }
+
+        categories.add(category);
+      }
 
       return categories;
     } else {
@@ -25,11 +43,43 @@ class Category {
   }
 }
 
+class CategoryWidget extends StatelessWidget {
+  Category category;
+
+  CategoryWidget({super.key, required this.category});
+
+  @override
+  Widget build(BuildContext context) {
+    var list = category.devices
+        .map((device) => TableRow(children: [
+              Text(device.device_descriptor ?? device.device_id),
+              Text(device.led_state.toString()),
+              Text(device.power_state.toString()),
+              Text("${device.power_draw.toString()} W")
+            ]))
+        .toList();
+
+    list.insert(
+        0,
+        const TableRow(children: [
+          Text("Name"),
+          Text("LED"),
+          Text("Power"),
+          Text("Power Draw"),
+        ]));
+
+    return Column(
+        children: <Widget>[Text(category.name), Table(children: list)]);
+  }
+}
+
 class Device {
-  final int device_id;
+  final String device_id;
+  String? device_descriptor;
   bool led_state;
   bool power_state;
   double power_draw;
 
-  Device(this.device_id, this.led_state, this.power_state, this.power_draw);
+  Device(this.device_id, this.device_descriptor, this.led_state,
+      this.power_state, this.power_draw);
 }

frontend/lib/main.dart

@@ -57,67 +57,48 @@ class MyHomePage extends StatefulWidget {
 }
 
 class _MyHomePageState extends State<MyHomePage> {
-  int _counter = 0;
-
-  void _incrementCounter() {
-    setState(() {
-      // This call to setState tells the Flutter framework that something has
-      // changed in this State, which causes it to rerun the build method below
-      // so that the display can reflect the updated values. If we changed
-      // _counter without calling setState(), then the build method would not be
-      // called again, and so nothing would appear to happen.
-      _counter++;
-    });
-  }
-
   @override
   Widget build(BuildContext context) {
-    // This method is rerun every time setState is called, for instance as done
+    return FutureBuilder<List<Category>>(
-    // by the _incrementCounter method above.
+        future: Category.fetch("smart.gavania.de"),
-    //
+        builder: (context, AsyncSnapshot<List<Category>> categories) {
-    // The Flutter framework has been optimized to make rerunning build methods
+          if (!categories.hasData) {
-    // fast, so that you can just rebuild anything that needs updating rather
+            return const Scaffold();
-    // than having to individually change instances of widgets.
+          }
-    return Scaffold(
+
-      appBar: AppBar(
+          return Scaffold(
-        // TRY THIS: Try changing the color here to a specific color (to
+              appBar: AppBar(
-        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
+                // TRY THIS: Try changing the color here to a specific color (to
-        // change color while the other colors stay the same.
+                // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
-        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+                // change color while the other colors stay the same.
-        // Here we take the value from the MyHomePage object that was created by
+                backgroundColor: Theme.of(context).colorScheme.inversePrimary,
-        // the App.build method, and use it to set our appbar title.
+                // Here we take the value from the MyHomePage object that was created by
-        title: Text(widget.title),
+                // the App.build method, and use it to set our appbar title.
-      ),
+                title: Text(widget.title),
-      body: Center(
+              ),
-        // Center is a layout widget. It takes a single child and positions it
+              body: Center(
-        // in the middle of the parent.
+                // Center is a layout widget. It takes a single child and positions it
-        child: Column(
+                // in the middle of the parent.
-          // Column is also a layout widget. It takes a list of children and
+                child: Column(
-          // arranges them vertically. By default, it sizes itself to fit its
+                  // Column is also a layout widget. It takes a list of children and
-          // children horizontally, and tries to be as tall as its parent.
+                  // arranges them vertically. By default, it sizes itself to fit its
-          //
+                  // children horizontally, and tries to be as tall as its parent.
-          // Column has various properties to control how it sizes itself and
+                  //
-          // how it positions its children. Here we use mainAxisAlignment to
+                  // Column has various properties to control how it sizes itself and
-          // center the children vertically; the main axis here is the vertical
+                  // how it positions its children. Here we use mainAxisAlignment to
-          // axis because Columns are vertical (the cross axis would be
+                  // center the children vertically; the main axis here is the vertical
-          // horizontal).
+                  // axis because Columns are vertical (the cross axis would be
-          //
+                  // horizontal).
-          // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
+                  //
-          // action in the IDE, or press "p" in the console), to see the
+                  // TRY THIS: Invoke "debug painting" (choose the "Toggle Debug Paint"
-          // wireframe for each widget.
+                  // action in the IDE, or press "p" in the console), to see the
-          mainAxisAlignment: MainAxisAlignment.center,
+                  // wireframe for each widget.
-          children: <Widget>[
+                  mainAxisAlignment: MainAxisAlignment.center,
-            Table(
+                  children: categories.data!
-              border: TableBorder.all(),
+                      .map((category) => CategoryWidget(category: category))
-            )
+                      .toList(),
-          ],
+                ),
-        ),
+              ));
-      ),
+        });
-      floatingActionButton: FloatingActionButton(
-        onPressed: _incrementCounter,
-        tooltip: 'Increment',
-        child: const Icon(Icons.add),
-      ), // This trailing comma makes auto-formatting nicer for build methods.
-    );
   }
 }

frontend/pubspec.yaml

@@ -36,6 +36,8 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
 
+  http: ^1.1.0
+
 dev_dependencies:
   flutter_test:
     sdk: flutter