From d2a6b3c2359facdd5a40e42593c8f1e7fa803e19 Mon Sep 17 00:00:00 2001
From: Muhammad Usama <imusamairshad@gmail.com>
Date: Wed, 28 Jun 2023 17:42:06 +0500
Subject: [PATCH] tabs.dart is modified.

---
 lib/screens/tabs.dart | 42 +++++++++++++++++++++++++++++++++++++-----
 1 file changed, 37 insertions(+), 5 deletions(-)

diff --git a/lib/screens/tabs.dart b/lib/screens/tabs.dart
index cc5cb77..a8772d5 100644
--- a/lib/screens/tabs.dart
+++ b/lib/screens/tabs.dart
@@ -1,10 +1,18 @@
 import 'package:flutter/material.dart';
+import 'package:meals_app/data/dummy_data.dart';
 import 'package:meals_app/models/meal.dart';
 import 'package:meals_app/widgets/main_drawer.dart';
 import 'package:meals_app/screens/categories.dart';
 import 'package:meals_app/screens/meals.dart';
 import 'package:meals_app/screens/filters.dart';
 
+const kInitialFilters = {
+  Filter.glutenFree: false,
+  Filter.lactoseFree: false,
+  Filter.vegetarian: false,
+  Filter.vegan: false,
+};
+
 class TabsScreen extends StatefulWidget {
   const TabsScreen({super.key});
   @override
@@ -16,6 +24,7 @@ class TabsScreen extends StatefulWidget {
 class _TabsScreenState extends State<TabsScreen> {
   int _selectedPageIndex = 0;
   final List<Meal> _favoriteMeals = [];
+  Map<Filter, bool> _selectedFilters = kInitialFilters;
 
   void _showInfoMessage(String message) {
     ScaffoldMessenger.of(context).clearSnackBars();
@@ -48,15 +57,21 @@ class _TabsScreenState extends State<TabsScreen> {
     });
   }
 
-  void _setScreen(String identifier) {
+  void _setScreen(String identifier) async {
     Navigator.of(context).pop();
     if (identifier == 'filters') {
-      Navigator.of(context).push(
+      final result = await Navigator.of(context).push<Map<Filter, bool>>(
         // before it was pushReplacement.
         MaterialPageRoute(
-          builder: (ctx) => const FiltersScreen(),
+          builder: (ctx) => FiltersScreen(
+            currentFilters: _selectedFilters,
+          ),
         ),
       );
+      setState(() {
+        _selectedFilters = result ?? kInitialFilters;
+      });
+      // print(result);
     }
     // else {
     //   Navigator.of(context).pop();
@@ -65,8 +80,25 @@ class _TabsScreenState extends State<TabsScreen> {
 
   @override
   Widget build(BuildContext context) {
-    Widget activePage =
-        CategoriesScreen(onToggleFavorite: _toggleMealFavoriteStatus);
+    final availableMeals = dummyMeals.where((meal) {
+      if (_selectedFilters[Filter.glutenFree]! && !meal.isGlutenFree) {
+        return false;
+      }
+      if (_selectedFilters[Filter.lactoseFree]! && !meal.isLactoseFree) {
+        return false;
+      }
+      if (_selectedFilters[Filter.vegetarian]! && !meal.isVegetarian) {
+        return false;
+      }
+      if (_selectedFilters[Filter.vegan]! && !meal.isVegan) {
+        return false;
+      }
+      return true;
+    }).toList();
+    Widget activePage = CategoriesScreen(
+      onToggleFavorite: _toggleMealFavoriteStatus,
+      availableMeals: availableMeals,
+    );
     var activePageTitle = 'Categories';
 
     if (_selectedPageIndex == 1) {