Merge pull request #201 from bitmovin/feature/player-info-widget

Introduce player info widget and add it to event subscription sample

example/lib/pages/event_subscription.dart

@@ -3,6 +3,7 @@ import 'package:bitmovin_player_example/controls.dart';
 import 'package:bitmovin_player_example/env/env.dart';
 import 'package:bitmovin_player_example/events.dart';
 import 'package:bitmovin_player_example/platform.dart';
+import 'package:bitmovin_player_example/player_info.dart';
 import 'package:bitmovin_player_example/player_view_container.dart';
 import 'package:flutter/material.dart';
 import 'package:logger/logger.dart';
@@ -17,6 +18,7 @@ class EventSubscription extends StatefulWidget {
 
 class _EventSubscriptionState extends State<EventSubscription> {
   final _eventsKey = GlobalKey<EventsState>();
+  final _playerInfoKey = GlobalKey<PlayerInfoState>();
   final _sourceConfig = SourceConfig(
     url: isIOS
         ? 'https://bitmovin-a.akamaihd.net/content/MI201109210084_1/m3u8s/f08e80da-bf1d-4e3d-8899-f0f6155f6efa.m3u8'
@@ -32,6 +34,8 @@ class _EventSubscriptionState extends State<EventSubscription> {
   final _logger = Logger();
 
   void _onEvent(Event event) {
+    _playerInfoKey.currentState?.updatePlayerInfo(_player, event);
+
     final eventName = '${event.runtimeType}';
     final eventData = '$eventName ${event.toJson()}';
     _logger.d(eventData);
@@ -115,10 +119,16 @@ class _EventSubscriptionState extends State<EventSubscription> {
           ),
           Expanded(
             child: Container(
-              margin: const EdgeInsets.fromLTRB(10, 10, 10, 40),
+              margin: const EdgeInsets.fromLTRB(10, 10, 10, 10),
               child: Events(key: _eventsKey),
             ),
           ),
+          Expanded(
+            child: Container(
+              margin: const EdgeInsets.fromLTRB(10, 10, 10, 10),
+              child: PlayerInfo(key: _playerInfoKey),
+            ),
+          ),
         ],
       ),
     );

example/lib/player_info.dart

@@ -0,0 +1,98 @@
+import 'package:bitmovin_player/bitmovin_player.dart';
+import 'package:flutter/material.dart';
+
+/// Maintains a table of player information that is updated dynamically based
+/// on received player events. Player state only gets added to the table if at
+/// least one event has been received for the corresponding state.
+class PlayerInfo extends StatefulWidget {
+  const PlayerInfo({super.key});
+
+  @override
+  State<StatefulWidget> createState() => PlayerInfoState();
+}
+
+class PlayerInfoState extends State<PlayerInfo> {
+  final Map<String, dynamic> _data = {};
+
+  Future<void> updatePlayerInfo(Player player, Event event) async {
+    if (event is ReadyEvent) {
+      final isLive = await player.isLive;
+      _updatePlayerInfoForField('isLive', Future.value(isLive));
+
+      final availableSubtitles = await player.availableSubtitles;
+      final subtitleLanguages = availableSubtitles.map((element) {
+        return element.label;
+      }).toList();
+
+      if (subtitleLanguages.isNotEmpty) {
+        _updatePlayerInfoForField(
+          'availableSubtitles',
+          Future.value(
+            subtitleLanguages.join(', '),
+          ),
+        );
+      }
+
+      if (isLive) {
+        _updatePlayerInfoForField('maxTimeShift', player.maxTimeShift);
+      } else {
+        _updatePlayerInfoForField('duration', player.duration);
+      }
+    }
+    if (event is PlayingEvent || event is PausedEvent) {
+      _updatePlayerInfoForField('isPlaying', player.isPlaying);
+    }
+    if (event is TimeChangedEvent) {
+      _updatePlayerInfoForField('currentTime', player.currentTime);
+      final isLive = await player.isLive;
+      if (isLive) {
+        _updatePlayerInfoForField('timeShift', player.timeShift);
+      }
+    }
+    if (event is SubtitleChangedEvent) {
+      final subtitle = await player.subtitle;
+      _updatePlayerInfoForField('subtitle', Future.value(subtitle.label));
+    }
+    if (event is CastAvailableEvent) {
+      _updatePlayerInfoForField('isCastAvailable', player.isCastAvailable);
+    }
+    if (event is CastStartedEvent || event is CastStoppedEvent) {
+      _updatePlayerInfoForField('isCasting', player.isCasting);
+    }
+  }
+
+  void _updatePlayerInfoForField(String field, Future<dynamic> value) {
+    value.then((dynamic value) {
+      setState(() {
+        _data[field] = value.toString();
+      });
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return ListView.builder(
+      itemCount: _data.length,
+      itemBuilder: (context, index) {
+        final key = _data.keys.elementAt(index);
+        final value = _data[key];
+
+        return Padding(
+          padding: const EdgeInsets.symmetric(vertical: 1, horizontal: 1),
+          child: Row(
+            children: [
+              Expanded(
+                flex: 2,
+                child: Text(key),
+              ),
+              Expanded(
+                flex: 3,
+                child: Text(value.toString()),
+              ),
+            ],
+          ),
+        );
+      },
+    );
+  }
+}

lib/src/platform/web/player_platform_web.dart

@@ -41,9 +41,9 @@ class PlayerPlatformWeb extends PlayerPlatformInterface {
     return div;
   }
 
+  // TODO(mario): implement subtitle tracks API for Web
   @override
-  Future<List<SubtitleTrack>> get availableSubtitles async =>
-      throw UnimplementedError();
+  Future<List<SubtitleTrack>> get availableSubtitles async => [];
 
   @override
   Future<void> castStop() async => _player.castStop();