Friend Purchase Recommendation

Given a user structure with friends and purchased products, provide a function to find the product names bought by friends but not by the user. Input/Output Input: User object user including: friends: list of friends, each friend is a user object purchases: list of purchases, each purchase is an object containing productId Output: List of strings representing recommended product names. Example Assume a product list: products = { "p1": "Product 1", "p2": "Product 2", "p3": "Product 3", } User A: Purchases: ["p1"] Friends: [User B] User B: Purchases: ["p1", "p2", "p3"] Function output should be: [Product 2", "Product 3"]`. Example Input Generate input based on example provided