Add: getting products from API

lib/tools/items.dart

@@ -0,0 +1,33 @@
+import 'dart:convert';
+
+import 'package:flutter/material.dart';
+import 'package:gymlink_module_web/interfaces/items.dart';
+import 'package:gymlink_module_web/providers/main.dart';
+import 'package:http/http.dart' as http;
+import 'package:provider/provider.dart';
+
+Future<List<GymItem>> getItems(BuildContext context) async {
+  final token = context.read<GymLinkProvider>().token;
+  if (token != '') {
+    final Uri url =
+        Uri.http('gymlink.freemyip.com:8080', 'api/product/get-list');
+    try {
+      final response = await http.get(url, headers: {
+        'Authorization': 'Bearer $token',
+      });
+      if (response.statusCode == 200) {
+        final data =
+            jsonDecode(utf8.decode(response.bodyBytes)) as List<dynamic>;
+        final items = data.map((e) => GymItem.fromJson(e)).toList();
+        return items;
+      }
+      throw Error();
+    } catch (e) {
+      debugPrint('error: $e');
+      return await Future.delayed(
+          const Duration(seconds: 5), () => getItems(context));
+    }
+  }
+  context.read<GymLinkProvider>().onError();
+  return [];
+}