6

lib/main.dart

@@ -32,6 +32,18 @@ class MyAppState extends ChangeNotifier {
     current = WordPair.random();
     notifyListeners();
   }
+
+  var favorites = <WordPair>[];
+
+  void toggleFavorite(){
+    if(favorites.contains(current)){
+      favorites.remove(current);
+    }
+    else{
+      favorites.add(current);
+      notifyListeners();
+    }
+  }
 }
 
 class MyHomePage extends StatelessWidget {
@@ -40,6 +52,14 @@ class MyHomePage extends StatelessWidget {
     var appState = context.watch<MyAppState>();
     var pair = appState.current;
 
+    IconData icon;
+    if(appState.favorites.contains(pair)){
+      icon = Icons.favorite;
+    }
+    else{
+      icon = Icons.favorite_border;
+    }
+
     return Scaffold(
       body: Center(
         child: Column(
@@ -48,9 +68,15 @@ class MyHomePage extends StatelessWidget {
             // Text('A random AWESOME idea:'),
             BigCard(pair: pair),
             SizedBox(height: 10,),
+            Row(
+              mainAxisSize: MainAxisSize.min,
+              children: [
+                ElevatedButton.icon(onPressed: (){appState.toggleFavorite();}, icon:Icon(icon), label: Text('Like'),),
                 ElevatedButton(onPressed: (){appState.getNext();}, child: Text('Next'),),
               ],
             ),
+          ],
+        ),
       ),
     );
   }