Integrate an audio player in the application

lib/ui/dialogs/audio_player_dialog.dart

@@ -0,0 +1,82 @@
+import 'package:chewie_audio/chewie_audio.dart';
+import 'package:comunic/ui/widgets/async_screen_widget.dart';
+import 'package:comunic/utils/intl_utils.dart';
+import 'package:flutter/cupertino.dart';
+import 'package:flutter/material.dart';
+import 'package:video_player/video_player.dart';
+
+/// Audio player dialog
+///
+/// @author Pierre Hubert
+
+/// Show audio player dialog
+Future<void> showAudioPlayerDialog(BuildContext context, String url) async {
+  showDialog(context: context, builder: (c) => _AudioPlayerDialog(url: url));
+}
+
+class _AudioPlayerDialog extends StatefulWidget {
+  final String url;
+
+  const _AudioPlayerDialog({
+    Key key,
+    @required this.url,
+  })  : assert(url != null),
+        super(key: key);
+
+  @override
+  __AudioPlayerDialogState createState() => __AudioPlayerDialogState();
+}
+
+class __AudioPlayerDialogState extends State<_AudioPlayerDialog> {
+  VideoPlayerController _videoPlayerController;
+  ChewieAudioController _chewieAudioController;
+
+  Future<void> _initialize() async {
+    _videoPlayerController = VideoPlayerController.network(widget.url);
+
+    await _videoPlayerController.initialize();
+
+    _chewieAudioController = ChewieAudioController(
+      videoPlayerController: _videoPlayerController,
+      autoPlay: true,
+      looping: false,
+    );
+  }
+
+  void _closeDialog() {
+    Navigator.pop(context);
+  }
+
+  @override
+  void dispose() {
+    if (_videoPlayerController != null) _videoPlayerController.dispose();
+    if (_chewieAudioController != null) _chewieAudioController.dispose();
+    super.dispose();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return AlertDialog(
+      title: Text(tr("Audio Player")),
+      content: _buildContent(),
+      actions: [
+        MaterialButton(
+          onPressed: _closeDialog,
+          child: Text(tr("Close").toUpperCase()),
+        )
+      ],
+    );
+  }
+
+  Widget _buildContent() => ConstrainedBox(
+        constraints: BoxConstraints(maxHeight: 300, maxWidth: 500),
+        child: AsyncScreenWidget(
+          onReload: _initialize,
+          onBuild: _buildReadyContent,
+          errorMessage: tr("Failed to initialize audio player!"),
+        ),
+      );
+
+  Widget _buildReadyContent() =>
+      ChewieAudio(controller: _chewieAudioController);
+}