Add some simple this in our Ruby on Rails website

I have a fully working rails ecommerce website. In the website admin can create an agent user(role) and then that agent can create a registration number this registration is used by normal users to add there shops. Shops can add products and other users xan buy products from shops. I want you to do four things in the website. Add a message system: all users should be able to message shops. Notification: if a order is place by a user the shop to which the product belongs should get a notification plus the agent to which the shop belongs should also get a [login to view URL] notification should be like this. (Rahul Sharma has placed an order.) After clicking on this it should show order details like product name price and quantity. Search Filter: we have a very simple working search system and there is a filter search present too...but it mearly works please make it work. Total Summery: Every agent has an Agent Panel where he can create a registration number and can see if an order get generated by the shops usi g that registration number....you have to show the name of the shop that is using the registration number instead of the registration number and you have to create a page i the agent panel called my summery where the agent can see all the orders that he has completed till date and total amount.