For Yigit- Connecting Ruby Rails Website to Wordpress Website (Communicate Between Both Platforms)

I'm trying to transfer data from the WP site to the ROR site for example: A client would go to the WP site and go through all of the front end navigations but when they choose a restaurant it would then be switched/connected with the backend ROR site to display the menus and they can continue to checkout. This allows SEO optimization on the front end but still providing the backend capabilities like: menu items, scheduling system, cart, checkout, etc. Step 1: Going to [login to view URL] will be on wordpress site Step 2: Homepage will be on wordpress site Step 3: Pressing some of the key buttons on the home page like (order now, search by city, etc…) All stay on wordpress site Step 4: Restaurants will be on wordpress site (But not the menus of the restaurants) Step 5: After picking restaurants it will transfer to the RoR site which will be [login to view URL] Step 6: Menu functions on RoR Step 7: Checkout will be on RoR *Need to all connect seamlessly and without confusion to our customers *Upcharge is 25% on menu items and add on items Key Factors: 1. Header and Footer need to be the same as the Wordpress site with all Divvee Stuff