PSR-4 PHP Payment Module (Paypal only)

1.] Project request: - Create a product page, cart and integrate paypal for checkout and payment. - Create a transaction monitoring page - Create a product manager page 2.] We want this to be done in - Bootstrap 3.2.0 - PHP 5.5.35 - PSR-4 - MySQL 3.] Major components 3.1.] Products list page As a user, I want to be able to browse product list and product details. As a user, I want to be able to add product in my cart. As a user, I want to be able to manage my cart content. As a user, I want to be able to checkout contents of my cart. As a logged user, I want to be able to add item to cart and checkout. As a logged user, I want to be able pay using Paypal. - Logged User - Email - Login Link (Instantiate and cache a user class object) - Logout (Uninstantiate and remove cached user class object) - Product List - Product View - Add To Cart - Quick Checkout(Adding to cart and Checkout) - Pagination - Product View - Add To Cart - Remove From Cart - Cart - View Contents - Add Product - Remove Product - Checkout - Checkout - Creation of Transaction Object - Paypal via Sandbox 3.2.] Paypal Ipn Listener - Completion of Transaction Object with Payment Info - Product inventory update 3.3.] Admin page As a viewer of this admin page, I want a page that would show me all transaction and their status. As a viewer of this admin page, I want a page that would show me all products and their qty. As a view of the transactions page, I want to be able to cancel and refund a transaction. As a view of the products page, I want to be able to add, remove, edit, enable, disable and delete a product. - Transaction Manager - Listing of transaction - Timestamp - User - Cart contents - Total Amount - Status - Initiated - Completed - Canceled - Refunded - Cancel Transaction - Refund Transaction - Pagination - Product Manager - Listing of Product - name - type - description - qty - cost - thumnbnail - image 1 - enabled[yes/no] - Add Product - Remove Product - Edit Product