text_tab.dart

class TextPage extends StatelessWidget {
  final String endpoint;
  final String selectedSubject;
  final String searchQuery;

  TextPage(
      {Key key,
      @required this.endpoint,
      @required this.selectedSubject,
      @required this.searchQuery})
      : super(key: key);

  @override
  Widget build(BuildContext context) {
    return NetworkWidget(
      child: BaseChangeNotifierProvider<ResourcesViewModel>(
        model: ResourcesViewModel(resourceServices: Provider.of(context)),
        onModelReady: (model) => model.getResources(endpoint, selectedSubject, searchQuery),
        builder: (context, model, child) =>
            LayoutBuilder(builder: (context, constraint) {
          var viewHeight = constraint.maxHeight;
          var viewWidth = constraint.maxWidth;

          switch (model.viewStateGet) {
            case ViewStateGet.Loading:
              return LeapsLoadIndicator.loadingPulse(viewHeight / 5);
            case ViewStateGet.hasData:
              return BuildTextResult(model.resources);
            case ViewStateGet.Empty:
              return Container(child: ResourceStateChangeWidget());
            case ViewStateGet.Error:
              return Center(
                child: SearchErrorView()
              );
            default:
              return Container();
          }
        }),
      ),
    );
  }
}

class BuildTextResult extends StatelessWidget {
  final List<Resource> snapshot;
  const BuildTextResult(this.snapshot);

  @override
  Widget build(BuildContext context) {
    return ListView.builder(
        itemCount: snapshot.length,
        scrollDirection: Axis.vertical,
        itemBuilder: (context, index) {
          return GestureDetector(
              onTap: () {
                Navigator.push(
                    context,
                    MaterialPageRoute(
                      builder: (BuildContext context) => TextReview(
                          resource: snapshot[index], isForLessonNote: false),
                      fullscreenDialog: true,
                    ));
              },
              child: TextItem(resource: snapshot[index]));
        });
  }
}