Perbaikan bloc di UI Search Meals

Perbaikan bloc di UI Search Meals yang error ketika menu tersebut dibuka kedua kali karena disebabkan oleh stream si bloc yang tertutup ketika dibuka kedua kali UI tersebut

Author: CoderJava

lib/src/blocs/searchmeals/search_meals_bloc.dart

@@ -6,13 +6,12 @@ import 'package:food_recipe/src/resources/food_api_repository.dart';
 import 'package:rxdart/rxdart.dart';
 
 class SearchMealsBloc {
-  // ignore: close_sinks
   final _publishSubjectSearchMealsByKeyword = PublishSubject<SearchMeals>();
   final _foodApiRepository = FoodApiRepository();
   final _favoriteMealRepository = FavoriteMealRepository();
 
   dispose() {
-    /*_publishSubjectSearchMealsByKeyword.close();*/
+    _publishSubjectSearchMealsByKeyword.close();
   }
 
   Observable<SearchMeals> get resultSearchMealsByKeyword =>
@@ -28,6 +27,10 @@ class SearchMealsBloc {
           await _foodApiRepository.getSearchMealsByKeyword(keyword);
       List<FavoriteMeal> listFavoriteMeals =
           await _favoriteMealRepository.getAllFavoriteMeals();
+      if (searchMeals.searchMealsItems == null) {
+        _publishSubjectSearchMealsByKeyword.sink.add(SearchMeals(searchMealsItems: []));
+        return;
+      }
       List<SearchMealsItem> listSearchMealsItem =
           searchMeals.searchMealsItems.where((searchMealsItem) {
         for (FavoriteMeal favoriteMeal in listFavoriteMeals) {
@@ -57,5 +60,3 @@ class SearchMealsBloc {
     return await _favoriteMealRepository.deleteFavoriteMealById(id);
   }
 }
-
-final searchMealsBloc = SearchMealsBloc();

lib/src/ui/searchmeals/search_meals_screen.dart

@@ -13,9 +13,17 @@ class SearchMealsScreen extends StatefulWidget {
 }
 
 class _SearchMealsScreenState extends State<SearchMealsScreen> {
+  SearchMealsBloc _searchMealsBloc;
+
+  @override
+  void initState() {
+    _searchMealsBloc = SearchMealsBloc();
+    super.initState();
+  }
+
   @override
   void dispose() {
-    searchMealsBloc.dispose();
+    _searchMealsBloc.dispose();
     super.dispose();
   }
 
@@ -63,7 +71,7 @@ class _SearchMealsScreenState extends State<SearchMealsScreen> {
 
   Widget _buildResultSearchMeals(MediaQueryData mediaQuery) {
     return StreamBuilder(
-      stream: searchMealsBloc.resultSearchMealsByKeyword,
+      stream: _searchMealsBloc.resultSearchMealsByKeyword,
       builder: (BuildContext context, AsyncSnapshot<SearchMeals> snapshot) {
         if (snapshot.hasData) {
           SearchMeals searchMeals = snapshot.data;
@@ -78,7 +86,7 @@ class _SearchMealsScreenState extends State<SearchMealsScreen> {
             itemCount: searchMeals.searchMealsItems.length,
             itemBuilder: (context, index) {
               var searchMealsItem = searchMeals.searchMealsItems[index];
-              return CardMeal(searchMealsItem);
+              return CardMeal(searchMealsItem, _searchMealsBloc);
             },
           );
         } else if (snapshot.hasError) {
@@ -100,7 +108,7 @@ class _SearchMealsScreenState extends State<SearchMealsScreen> {
           horizontal: 12.0,
           vertical: 8.0,
         ),
-        child: TextFieldSearch(),
+        child: TextFieldSearch(_searchMealsBloc),
       ),
     );
   }
@@ -125,8 +133,9 @@ class _SearchMealsScreenState extends State<SearchMealsScreen> {
 
 class CardMeal extends StatefulWidget {
   final SearchMealsItem searchMealsItem;
+  final SearchMealsBloc searchMealsBloc;
 
-  CardMeal(this.searchMealsItem);
+  CardMeal(this.searchMealsItem, this.searchMealsBloc);
 
   @override
   _CardMealState createState() => _CardMealState();
@@ -206,7 +215,7 @@ class _CardMealState extends State<CardMeal> {
                         onTap: () {
                           var isFavorite = widget.searchMealsItem.isFavorite;
                           if (isFavorite) {
-                            searchMealsBloc
+                            widget.searchMealsBloc
                                 .deleteFavoriteMealById(
                                     widget.searchMealsItem.idMeal)
                                 .then((status) {
@@ -216,14 +225,14 @@ class _CardMealState extends State<CardMeal> {
                             });
                           } else {
                             Future<LookupMealsById> lookupMealsById =
-                                searchMealsBloc.getDetailMealById(
+                                widget.searchMealsBloc.getDetailMealById(
                                     widget.searchMealsItem.idMeal);
                             lookupMealsById.then((value) {
                               if (value != null) {
                                 var item = value.lookupMealsbyIdItems[0];
                                 FavoriteMeal favoriteMeal =
                                     FavoriteMeal.fromJson(item.toJson());
-                                searchMealsBloc
+                                widget.searchMealsBloc
                                     .addFavoriteMeal(favoriteMeal)
                                     .then((status) {
                                   setState(() {
@@ -265,6 +274,10 @@ class _CardMealState extends State<CardMeal> {
 }
 
 class TextFieldSearch extends StatefulWidget {
+  final SearchMealsBloc searchMealsBloc;
+
+  TextFieldSearch(this.searchMealsBloc);
+
   @override
   _TextFieldSearchState createState() => _TextFieldSearchState();
 }
@@ -297,12 +310,12 @@ class _TextFieldSearchState extends State<TextFieldSearch> {
             onChanged: (value) {
               setState(() {});
               if (value.isEmpty) {
-                searchMealsBloc.searchMealsByKeyword(value);
+                widget.searchMealsBloc.searchMealsByKeyword(value);
               }
             },
             onSubmitted: (value) {
               setState(() {});
-              searchMealsBloc.searchMealsByKeyword(value);
+              widget.searchMealsBloc.searchMealsByKeyword(value);
             },
           ),
         ),
@@ -311,7 +324,7 @@ class _TextFieldSearchState extends State<TextFieldSearch> {
             : GestureDetector(
                 onTap: () {
                   setState(() => _textEditingControllerKeyword.clear());
-                  searchMealsBloc.searchMealsByKeyword("");
+                  widget.searchMealsBloc.searchMealsByKeyword("");
                 },
                 child: Icon(
                   Icons.clear,