update valid time from menu

app/models/menu_category.rb

@@ -37,6 +37,25 @@ class MenuCategory < ApplicationRecord
     end
   end
 
+  def valid_time
+
+    menu_category = MenuCategory.find(self.id)
+    menu          = Menu.find(menu_category.menu_id)
+    from          = menu.valid_time_from.strftime("%H:%m:%S")
+    to            = menu.valid_time_to.strftime("%H:%m:%S")
+    current       = Time.now.utc.getlocal.strftime("%H:%m:%S")
+ 
+    from          = from.split(':').map { |a| a.to_i }.inject(0) { |a, b| a * 60 + b}
+    to            = to.split(':').map { |a| a.to_i }.inject(0) { |a, b| a * 60 + b}
+    current       = current.split(':').map { |a| a.to_i }.inject(0) { |a, b| a * 60 + b}
+
+     if current.between?(from, to)
+       return true
+     else
+       return nil
+     end
+  end
+
   private
 
   # def generate_menu_category_code