codigo actual del servidor, con avances de joan

source_code/lib/custom/loading.dart

@@ -0,0 +1,55 @@
+import 'dart:async';
+
+import 'package:active_ecommerce_seller_app/custom/localization.dart';
+import 'package:flutter/material.dart';
+import 'package:one_context/one_context.dart';
+
+
+
+class Loading{
+ static BuildContext? _buildContext;
+ static late BuildContext _context;
+
+  static setInstance(BuildContext context){
+    _buildContext= context;
+  }
+
+  static getInstance()=>Loading._buildContext;
+
+  Future show()async{
+
+    return showDialog(
+      context: Loading._buildContext!,
+      builder: (BuildContext context) {
+        Loading._context=context;
+        return  AlertDialog(
+            content: Row(
+              children: [
+                CircularProgressIndicator(),
+                const SizedBox(
+                  width: 10,
+                ),
+                Text(LangText(context: context).getLocal()!.please_wait_ucf),
+              ],
+            ));
+      },);
+  }
+
+  hide(){
+    Navigator.of(Loading._context).pop();
+  }
+
+
+
+
+ static Widget bottomLoading(bool value){
+     return value? Container(
+       alignment: Alignment.center,
+       child: SizedBox(
+         height: 20,
+           width: 20,
+           child: CircularProgressIndicator()),
+     ):SizedBox(height: 5,width: 5,);
+   }
+
+}