Initial Commit

lib/audio_cache.dart

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+
+import 'dart:typed_data';
+
+import 'package:archive/archive.dart';
+import 'package:flutter/services.dart';
+
+class AudioCache {
+
+  // Filename, bytes
+  Map<String, Uint8List> _audioCache = {};
+
+  List<String> get keys {
+    return _audioCache.keys.toList();
+  }
+
+  Uint8List operator [](String key) {
+    return _audioCache[key]!;
+  }
+}
+
+class AnnouncementCache extends AudioCache {
+
+  String _assetLocation = "assets/ibus_recordings.zip";
+
+  Future<void> loadAnnouncements(List<String> Announcements) async {
+
+    final bytes = await rootBundle.load(_assetLocation);
+    final archive = ZipDecoder().decodeBytes(bytes.buffer.asUint8List());
+
+    for (final file in archive) {
+      if (Announcements.contains(file.name)) {
+        _audioCache[file.name] = file.content;
+      }
+    }
+  }
+
+  Future<void> loadAllAnnouncements() async {
+
+    print("Loading all announcements.");
+
+    final bytes = await rootBundle.load(_assetLocation);
+    final archive = ZipDecoder().decodeBytes(bytes.buffer.asUint8List());
+
+    print("Done decoding zip file.");
+    print("Number of files: ${archive.length}");
+
+    for (final file in archive) {
+
+      if (file.isFile == false) {
+        continue;
+      }
+
+      String filename = file.name;
+      if (filename.contains("/")) {
+        filename = filename.split("/").last;
+      }
+
+      _audioCache[filename] = file.content;
+    }
+
+    print("Done loading all announcements.");
+  }
+
+}

lib/main.dart

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+import 'package:bus_infotainment/pages/audio_cache_test.dart';
+import 'package:flutter/material.dart';
+
+void main() {
+  runApp(const MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  const MyApp({super.key});
+
+  // This widget is the root of your application.
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Flutter Demo',
+      theme: ThemeData(
+        // This is the theme of your application.
+        //
+        // TRY THIS: Try running your application with "flutter run". You'll see
+        // the application has a purple toolbar. Then, without quitting the app,
+        // try changing the seedColor in the colorScheme below to Colors.green
+        // and then invoke "hot reload" (save your changes or press the "hot
+        // reload" button in a Flutter-supported IDE, or press "r" if you used
+        // the command line to start the app).
+        //
+        // Notice that the counter didn't reset back to zero; the application
+        // state is not lost during the reload. To reset the state, use hot
+        // restart instead.
+        //
+        // This works for code too, not just values: Most code changes can be
+        // tested with just a hot reload.
+        colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
+        useMaterial3: true,
+      ),
+      routes: {
+        '/home': (context) => const MyHomePage(title: 'Flutter Demo Home Page'),
+        '/': (context) => AudioCacheTest(),
+
+      },
+    );
+  }
+}
+
+class MyHomePage extends StatefulWidget {
+  const MyHomePage({super.key, required this.title});
+
+  // This widget is the home page of your application. It is stateful, meaning
+  // that it has a State object (defined below) that contains fields that affect
+  // how it looks.
+
+  // This class is the configuration for the state. It holds the values (in this
+  // case the title) provided by the parent (in this case the App widget) and
+  // used by the build method of the State. Fields in a Widget subclass are
+  // always marked "final".
+
+  final String title;
+
+  @override
+  State<MyHomePage> createState() => _MyHomePageState();
+}
+
+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
+    // by the _incrementCounter method above.
+    //
+    // The Flutter framework has been optimized to make rerunning build methods
+    // fast, so that you can just rebuild anything that needs updating rather
+    // than having to individually change instances of widgets.
+    return Scaffold(
+      appBar: AppBar(
+        // TRY THIS: Try changing the color here to a specific color (to
+        // Colors.amber, perhaps?) and trigger a hot reload to see the AppBar
+        // change color while the other colors stay the same.
+        backgroundColor: Theme.of(context).colorScheme.inversePrimary,
+        // Here we take the value from the MyHomePage object that was created by
+        // 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
+        // in the middle of the parent.
+        child: Column(
+          // Column is also a layout widget. It takes a list of children and
+          // 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
+          // center the children vertically; the main axis here is the vertical
+          // 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
+          // wireframe for each widget.
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: <Widget>[
+            const Text(
+              'You have pushed the button this many times:',
+            ),
+            Text(
+              '$_counter',
+              style: Theme.of(context).textTheme.headlineMedium,
+            ),
+          ],
+        ),
+      ),
+      floatingActionButton: FloatingActionButton(
+        onPressed: _incrementCounter,
+        tooltip: 'Increment',
+        child: const Icon(Icons.add),
+      ), // This trailing comma makes auto-formatting nicer for build methods.
+    );
+  }
+}

lib/pages/audio_cache_test.dart

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+
+
+import 'package:audioplayers/audioplayers.dart';
+import 'package:bus_infotainment/audio_cache.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+
+class AudioCacheTest extends StatelessWidget {
+
+  AnnouncementCache _announcementCache = AnnouncementCache();
+
+  AudioCacheTest({super.key}) {
+
+  }
+
+
+  @override
+  Widget build(BuildContext context) {
+
+    return Scaffold(
+
+      appBar: AppBar(
+        title: Text(
+          "AudioCacheTest"
+        )
+      ),
+
+      body: Container(
+        child: FutureBuilder(
+          future: _announcementCache.loadAllAnnouncements(),
+          builder: (BuildContext context, AsyncSnapshot<void> snapshot) {
+            if (snapshot.connectionState == ConnectionState.done) {
+              
+              List<Widget> announcements = [];
+              
+              for (var key in _announcementCache.keys) {
+              
+                announcements.add(
+                  ElevatedButton(
+                    onPressed: () {
+                      AudioPlayer player = AudioPlayer();
+                      player.play(BytesSource(_announcementCache[key]));
+                    },
+                    child: Text(
+                      key
+                    )
+                  )
+                );
+              }
+                
+              return ListView(
+                children: announcements,
+              );
+            } else {
+              return CircularProgressIndicator();
+            }
+          }
+        )
+      ),
+
+    );
+  }
+
+}

lib/singletons/live_information.dart

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+
+// Singleton
+class LiveInformation {
+
+}