use dedicated audioprovider

lib/pages/interval_page.dart

@@ -10,7 +10,7 @@ class IntervalTimerPage extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return const ViewFormPage(
-        form: WorkoutForm(), view: WorkoutView(), page: Pages.timer);
+    return ViewFormPage(
+        form: WorkoutForm(), view: const WorkoutView(), page: Pages.timer);
   }
 }

lib/providers/audio_provider.dart

@@ -0,0 +1,47 @@
+import 'dart:async';
+
+import 'package:audioplayers/audioplayers.dart';
+import 'package:flutter/cupertino.dart';
+
+class AudioProvider extends ChangeNotifier {
+  final AudioPlayer _audioPlayer = AudioPlayer();
+  bool _isMuted = false;
+  final Source _finishedSoundSource = AssetSource('finish.mp3');
+  final Source _beepSoundSource = AssetSource('beep.mp3');
+  StreamSubscription? _onCompleteSubscription;
+
+  bool get isMuted => _isMuted;
+
+  void stop() => _resetPlayer();
+
+  void playFinishSound() {
+    _resetPlayer();
+    _audioPlayer.play(_finishedSoundSource);
+  }
+
+  void mutePlayer() {
+    _isMuted = true;
+    _audioPlayer.setVolume(0);
+    notifyListeners();
+  }
+
+  void unMutePlayer() {
+    _isMuted = false;
+    _audioPlayer.setVolume(1);
+    notifyListeners();
+  }
+
+  //resets player position and delete listening subscription
+  void _resetPlayer() {
+    _audioPlayer.stop();
+    _onCompleteSubscription?.cancel();
+  }
+
+  void playSourceAfterBeep(AssetSource source) {
+    _resetPlayer();
+    _audioPlayer.play(_beepSoundSource);
+    _onCompleteSubscription = _audioPlayer.onPlayerComplete.listen((event) {
+      _audioPlayer.play(source);
+    });
+  }
+}

lib/providers/workout_provider.dart

@@ -1,38 +1,20 @@
-import 'dart:async';
-
 import 'package:audioplayers/audioplayers.dart';
 import 'package:flutter/material.dart';
 import 'package:smoke_cess_app/models/workout.dart';
+import 'package:smoke_cess_app/providers/audio_provider.dart';
 import 'package:smoke_cess_app/providers/timer_provider.dart';
 import '../globals.dart' as globals;
 
 class WorkoutProvider extends ChangeNotifier {
-  TimerProvider timerProvider;
+  final TimerProvider timerProvider;
+  final AudioProvider audioProvider;
 
-  final AudioPlayer _audioPlayer = AudioPlayer();
-  late StreamSubscription _onCompleteSubscription;
-  final Source _finishedSoundSource = AssetSource('finish.mp3');
-  final Source _beepSoundSource = AssetSource('beep.mp3');
   bool isWorkoutStarted = false;
   bool isWorkoutComplete = false;
-  bool isMuted = false;
   int motivationBefore = 50;
   int motivationAfter = 50;
 
-  void mutePlayer() {
-    isMuted = true;
-    _audioPlayer.setVolume(0);
-    notifyListeners();
-  }
-
-  void unMutePlayer() {
-    isMuted = false;
-    _audioPlayer.setVolume(1);
-    notifyListeners();
-  }
-
-  WorkoutProvider(this.timerProvider);
-
+  int _workoutPhaseIndex = 0;
   final List<String> _workoutPhases = [
     'Warm-Up',
     'High Intensity',
@@ -44,7 +26,8 @@ class WorkoutProvider extends ChangeNotifier {
     'High Intensity',
     'Cool-down'
   ];
-  int _workoutPhaseIndex = 0;
+
+  WorkoutProvider(this.timerProvider, this.audioProvider);
 
   String get currentPhase => _workoutPhases[_workoutPhaseIndex];
   Duration get currentPhaseDuration =>
@@ -54,22 +37,15 @@ class WorkoutProvider extends ChangeNotifier {
   Color get currentPhaseColor => _workoutPhaseSettings[currentPhase]!['color'];
   AssetSource get currentPhaseSource =>
       _workoutPhaseSettings[currentPhase]!['source'];
-  /* bool get isWorkoutComplete =>
-      _workoutPhaseIndex == _workoutPhases.length - 1 && isPhaseComplete; */
 
   void nextPhase() {
-    _onCompleteSubscription.cancel();
-    _audioPlayer.stop();
     if (_workoutPhaseIndex < _workoutPhases.length - 1) {
-      _audioPlayer.play(_beepSoundSource);
       _workoutPhaseIndex += 1;
-      _onCompleteSubscription = _audioPlayer.onPlayerComplete.listen((event) {
-        _audioPlayer.play(currentPhaseSource);
-      });
+      audioProvider.playSourceAfterBeep(currentPhaseSource);
       timerProvider.startTimer(currentPhaseDuration);
     } else {
       //workout completed
-      _audioPlayer.play(_finishedSoundSource);
+      audioProvider.playFinishSound;
       stopWorkout();
     }
   }
@@ -77,29 +53,29 @@ class WorkoutProvider extends ChangeNotifier {
   void startWorkout() {
     isWorkoutStarted = true;
     isWorkoutComplete = false;
-    _audioPlayer.play(_beepSoundSource).whenComplete(() => null);
-    _onCompleteSubscription = _audioPlayer.onPlayerComplete.listen((event) {
-      _audioPlayer.play(currentPhaseSource);
-    });
+    audioProvider.playSourceAfterBeep(currentPhaseSource);
     timerProvider.startTimer(currentPhaseDuration);
   }
 
   void stopWorkout() {
     isWorkoutStarted = false;
     isWorkoutComplete = true;
-    _audioPlayer.stop();
-    timerProvider.stopTimer();
+    _cleanUp();
     notifyListeners();
   }
 
   void interruptWorkout() {
     isWorkoutStarted = false;
     isWorkoutComplete = false;
-    _audioPlayer.stop();
-    timerProvider.stopTimer();
+    _cleanUp();
     notifyListeners();
   }
 
+  void _cleanUp() {
+    audioProvider.stop();
+    timerProvider.stopTimer();
+  }
+
   void saveWorkout() {
     Workout workout =
         Workout(motivationBefore, motivationAfter, DateTime.now());
@@ -108,7 +84,7 @@ class WorkoutProvider extends ChangeNotifier {
 
   @override
   void dispose() {
-    interruptWorkout();
+    _cleanUp();
     super.dispose();
   }
 }

lib/widgets/mute_button.dart

@@ -1,13 +1,14 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
-import 'package:smoke_cess_app/providers/workout_provider.dart';
+
+import '../providers/audio_provider.dart';
 
 class MuteButton extends StatelessWidget {
   const MuteButton({super.key});
 
   @override
   Widget build(BuildContext context) {
-    WorkoutProvider workoutProvider = context.watch<WorkoutProvider>();
+    AudioProvider workoutProvider = context.watch<AudioProvider>();
 
     return IconButton(
       onPressed: workoutProvider.isMuted

lib/widgets/workout_form.dart

@@ -1,21 +1,26 @@
 import 'package:flutter/material.dart';
 import 'package:provider/provider.dart';
+import 'package:smoke_cess_app/providers/audio_provider.dart';
 import '../providers/timer_provider.dart';
 import '../providers/workout_provider.dart';
 import 'mute_button.dart';
 import 'workout_timer_widget.dart';
 
 class WorkoutForm extends StatelessWidget {
-  const WorkoutForm({super.key});
+  WorkoutForm({super.key});
+
+  final TimerProvider timerProvider = TimerProvider();
+  final AudioProvider audioProvider = AudioProvider();
 
   @override
   Widget build(BuildContext context) {
-    TimerProvider timerProvider = TimerProvider();
     return MultiProvider(
         providers: [
           ChangeNotifierProvider(create: (context) => timerProvider),
+          ChangeNotifierProvider(create: (context) => audioProvider),
           ChangeNotifierProvider(
-              create: (context) => WorkoutProvider(timerProvider)),
+              create: (context) =>
+                  WorkoutProvider(timerProvider, audioProvider)),
         ],
         child: Column(
           mainAxisAlignment: MainAxisAlignment.center,