public function add()
 {
     $micantidad = Input::get('micantidad');
     $itemCode = Input::get('itemCode');
     $ID = Session::get('UserId');
     $client = Session::get('Client');
     //$ID = Sap::getId();
     //$client = Sap::getClientSoap();
     $CurrencyRate = $client->call('getCurrencyRate', array('tipo' => 'USD', 'SID' => $ID));
     $currency = $CurrencyRate['getCurrencyRateResult'];
     /*
       funcion para sacar el detalle de un producto
     */
     $ItemList = $client->call('GetDetalle', array('SID' => $ID, 'producto' => $itemCode));
     $productos = (string) $ItemList['GetDetalleResult'];
     $datos = utf8_encode($productos);
     $BOM = new \SimpleXMLElement($datos);
     //datos a mostrar en la interfaz
     $itemName = (string) $BOM->BO->Items->row->ItemName;
     $itemCode = (string) $BOM->BO->Items->row->ItemCode;
     if ($BOM->BO->Items_Prices->row[0]->Currency == "MXP") {
         $numero = (double) $BOM->BO->Items_Prices->row[1]->Price;
         $numero = number_format($numero, 2, '.', ',');
         $precio = $numero;
     } else {
         $number = (double) $BOM->BO->Items_Prices->row[1]->Price;
         $number = number_format($number, 2, '.', ',');
         $numero = $number * $currency;
         $numero = number_format($numero, 2, '.', ',');
         $precio = $numero;
     }
     $stock = $BOM->BO->Items->row->QuantityOnStock * 1;
     $articulos = array('ItemCode' => $itemCode, 'ItemName' => $itemName, 'cantidad' => $micantidad, 'precio' => $precio, 'stock' => $stock, 'cliente' => (string) Auth::user()->email, 'user_id' => Auth::user()->id);
     $carr = DB::table('carrito')->where('itemCode', $itemCode)->where('user_id', Auth::user()->id)->first();
     if ($carr) {
         $cant = $carr->cantidad;
         DB::table('carrito')->where('itemCode', $itemCode)->where('user_id', Auth::user()->id)->update(['cantidad' => (int) $cant + (int) Request::get('number'), 'stock' => $stock]);
     } else {
         Carrito::create($articulos);
     }
     $articulos = DB::table('carrito')->where('user_id', '=', Auth::user()->id)->get();
     $value = count($articulos);
     session(['cant' => $value]);
     Session::put('add', "Tu Producto ha sido Agregado al Carrito");
     return redirect()->back();
 }