Fix continue without and other bugs

lib/models/video/stream_state_model.dart

@@ -8,25 +8,25 @@ class StreamState {
   final bool isLoading;
   final List<Stream>? streams;
   final List<Stream>? liveStreams;
-  final List<String>? thumbnails;
   final AppError? error;
   final Progress? progress;
   final bool isWatched;
   final String? videoSource;
   final List<Tuple2<Stream, String>>? streamsWithThumb;
+  final List<Tuple2<Stream, String>>? liveStreamsWithThumb;
   final List<Tuple2<Stream, String>>? displayedStreams;
   final String selectedFilterOption;
 
   const StreamState({
     this.isLoading = false,
     this.streams,
     this.liveStreams,
-    this.thumbnails,
     this.error,
     this.progress,
     this.isWatched = false,
     this.videoSource,
     this.streamsWithThumb,
+    this.liveStreamsWithThumb,
     this.displayedStreams,
     this.selectedFilterOption = 'Oldest First',
   });
@@ -42,19 +42,20 @@ class StreamState {
     String? videoSource,
     Map<int, String>? downloadedVideos,
     List<Tuple2<Stream, String>>? streamsWithThumb,
+    List<Tuple2<Stream, String>>? liveStreamsWithThumb,
     List<Tuple2<Stream, String>>? displayedStreams,
     String? selectedFilterOption,
   }) {
     return StreamState(
       isLoading: isLoading ?? this.isLoading,
       streams: streams ?? this.streams,
       liveStreams: liveStreams ?? this.liveStreams,
-      thumbnails: thumbnails ?? this.thumbnails,
       error: error ?? this.error,
       progress: progress ?? this.progress,
       isWatched: isWatched ?? this.isWatched,
       videoSource: videoSource ?? this.videoSource,
       streamsWithThumb: streamsWithThumb ?? this.streamsWithThumb,
+      liveStreamsWithThumb: liveStreamsWithThumb ?? this.liveStreamsWithThumb,
       displayedStreams: displayedStreams ?? this.displayedStreams,
       selectedFilterOption: selectedFilterOption ?? this.selectedFilterOption,
     );
@@ -65,11 +66,11 @@ class StreamState {
       isLoading: isLoading,
       streams: streams,
       liveStreams: liveStreams,
-      thumbnails: thumbnails,
       progress: progress,
       isWatched: isWatched,
       videoSource: videoSource,
       streamsWithThumb: streamsWithThumb,
+      liveStreamsWithThumb: liveStreamsWithThumb,
       displayedStreams: displayedStreams,
       error: null,
     );
@@ -80,11 +81,11 @@ class StreamState {
       isLoading: isLoading,
       streams: streams,
       liveStreams: liveStreams,
-      thumbnails: thumbnails,
       progress: progress,
       isWatched: isWatched,
       videoSource: videoSource,
       streamsWithThumb: streamsWithThumb,
+      liveStreamsWithThumb: liveStreamsWithThumb,
       displayedStreams: displayedStreams,
       error: null,
     );

lib/utils/section_kind.dart

@@ -0,0 +1 @@
+enum SectionKind { livestreams, myCourses, publicCourses }

lib/view_models/stream_view_model.dart

@@ -24,6 +24,28 @@ class StreamViewModel extends StateNotifier<StreamState> {
     }
   }
 
+
+
+  void updatedDisplayedStreams(List<Tuple2<Stream, String>> allStreams) {
+    state = state.copyWith(displayedStreams: allStreams);
+  }
+
+  void setUpDisplayedCourses(List<Tuple2<Stream, String>> allStreams) {
+    updatedDisplayedStreams(
+      CourseUtils.sortStreams(allStreams, state.selectedFilterOption),
+    );
+  }
+
+  void updateSelectedFilterOption(
+    String option,
+    List<Tuple2<Stream, String>> allStreams,
+  ) {
+    state = state.copyWith(selectedFilterOption: option);
+    updatedDisplayedStreams(
+      CourseUtils.sortStreams(allStreams, state.selectedFilterOption),
+    );
+  }
+
   /// This asynchronous function fetches thumbnails for all available streams in the current state.
   /// only if there are streams in the current state.
   /// It initiates fetching of thumbnails for each stream by invoking `fetchThumbnailForStream`.
@@ -47,23 +69,25 @@ class StreamViewModel extends StateNotifier<StreamState> {
     setUpDisplayedCourses(fetchedStreamsWithThumbnails);
   }
 
-  void updatedDisplayedStreams(List<Tuple2<Stream, String>> allStreams) {
-    state = state.copyWith(displayedStreams: allStreams);
-  }
-
-  void setUpDisplayedCourses(List<Tuple2<Stream, String>> allStreams) {
-    updatedDisplayedStreams(
-      CourseUtils.sortStreams(allStreams, state.selectedFilterOption),
-    );
-  }
-
-  void updateSelectedFilterOption(
-    String option,
-    List<Tuple2<Stream, String>> allStreams,
-  ) {
-    state = state.copyWith(selectedFilterOption: option);
-    updatedDisplayedStreams(
-      CourseUtils.sortStreams(allStreams, state.selectedFilterOption),
+  /// This asynchronous function fetches thumbnails for all available live streams in the current state.
+  /// only if there are live streams in the current state.
+  /// It initiates fetching of thumbnails for each live stream by invoking `fetchThumbnailForStream`.
+  Future<void> fetchLiveThumbnails() async {
+    if (state.liveStreams == null) {
+      return;
+    }
+    var fetchLiveThumbnailTasks = <Future<Tuple2<Stream, String>>>[];
+    for (var stream in state.liveStreams!) {
+      fetchLiveThumbnailTasks.add(
+        fetchStreamThumbnail(stream.id)
+            .then((thumbnail) => Tuple2(stream, thumbnail)),
+      );
+    }
+    var fetchedStreamsWithThumbnails =
+        await Future.wait(fetchLiveThumbnailTasks);
+    state = state.copyWith(
+      liveStreamsWithThumb: fetchedStreamsWithThumbnails,
+      isLoading: false,
     );
   }