Add: Getting items by its ids

lib/pages/order_confirmation.dart

@@ -61,12 +61,15 @@ class _OrderConfirmationPageState extends State<OrderConfirmationPage> {
   List<GymItem> cartItems = [];
   double totalPrice = 0;
   List<GymItem> gymCart = [];
+  bool _isLoading = true;
 
   @override
   void initState() {
     super.initState();
     Future.microtask(() => getCart().then((value) async {
-          final items = await getItems(context);
+          final itemIds =
+              value.map((element) => element['id'] as String).toList();
+          final items = await getItemsByIds(context, itemIds);
           setState(() {
             gymCart = items;
             cartItems = value.map((element) {
@@ -76,6 +79,7 @@ class _OrderConfirmationPageState extends State<OrderConfirmationPage> {
             }).toList();
             totalPrice = cartItems.fold(
                 0, (sum, item) => sum + item.price * item.localCount);
+            _isLoading = false;
           });
         }));
   }
@@ -98,24 +102,26 @@ class _OrderConfirmationPageState extends State<OrderConfirmationPage> {
           const GymLinkHeader(title: 'Оформление заказа'),
           const MarkdownBody(data: '## Состав заказа:'),
           Expanded(
-            child: ConstrainedBox(
-              constraints: const BoxConstraints(maxHeight: 350),
-              child: ListView.builder(
-                itemCount: cartItems.length,
-                itemBuilder: (context, index) {
-                  final item = cartItems[index];
-                  return OrderConfirmItemCard(
-                    name: item.title,
-                    image: Image(
-                        image: NetworkImage(item.images[0].url),
-                        width: 50,
-                        height: 50),
-                    price: item.price,
-                    count: item.localCount,
-                  );
-                },
-              ),
-            ),
+            child: _isLoading
+                ? const Center(child: CircularProgressIndicator())
+                : ConstrainedBox(
+                    constraints: const BoxConstraints(maxHeight: 350),
+                    child: ListView.builder(
+                      itemCount: cartItems.length,
+                      itemBuilder: (context, index) {
+                        final item = cartItems[index];
+                        return OrderConfirmItemCard(
+                          name: item.title,
+                          image: Image(
+                              image: NetworkImage(item.images[0].url),
+                              width: 50,
+                              height: 50),
+                          price: item.price,
+                          count: item.localCount,
+                        );
+                      },
+                    ),
+                  ),
           ),
           const SizedBox(
             height: 10,