Exercise: Inventory Management

Problem statement

Your task is to complete the implementation of essential functions in the Inventory class. The primary focus is on effectively managing products, producers, and sellers.

The Product class

The Product class is a fundamental entity in the inventory system, representing an item with unique identification, a name, a price, and a category.

The Inventory class

The Inventory class serves as the backbone of the inventory management system. It encapsulates functionalities for adding and removing products, associating products with producers, managing sellers, and providing a detailed inventory display.

Instructions

In the given code, you are presented with the initial structure of the Inventory class and a basic Product class. Your task is to implement the missing functions in the Inventory class. The methods should exhibit the following behavior:

• addProduct: It adds a product to the inventory and assigns a producer.

• removeProduct: It removes a product from the inventory along with its producer.

• addSeller: It adds a seller to the seller’s collection.

• removeSeller: It removes a seller from the seller’s collection.

• getProductsCount: It returns the number of products in the inventory.

• hasProduct: It returns true if the inventory contains the given product.

• hasProducts: It returns true if the inventory contains any products.

• getProducer: It returns the producer of the given product, or null if the product is not in the inventory.

• produceInventoryDisplay: It returns a string containing the inventory display in the following format: