Angular / Modification in existing shopping cart

URL : [login to view URL] We want few modifications in the above sample code Want Categories ->some thing like that -> [login to view URL] in Search : when category is selected then it should search only in that current category in search : if we search like i7 ssd or i7, ssd then it should search items like this as well i7, 12 GB RAM, 120 GB SSD Product Attributes of 2 types: Text Box and Drop Down List (It should the selected attributes in cart, allow modification in cart and should submit these attributes values to paypal at checkout)