Implement waiter ordering and improvements

app/controllers/waiter_controller.rb

@@ -18,4 +18,19 @@ class WaiterController < ApplicationController
       format.json { render json: ProductCategory.all.include_relation(:product), root: 'product_categories', each_serializer: ProductCategorySerializer }
     end
   end
+
+  def order_products
+    @table= Table.find_by_supplier_id_and_id!(current_supplier.id, params[:table_id])
+    @list = List.from_table_by_employee(@table, current_employee)
+    @list.place_order params[:order], employee: current_employee
+    render nothing: true
+  end
+
+  def current_supplier
+    @current_supplier ||= Supplier.first
+  end
+
+  def current_employee
+    @current_employee ||= current_supplier.employees.first
+  end
 end