E-Commerce Application

This project is an E-commerce application developed using Spring Boot. It includes the management of products, customers, carts, and orders. The application ensures that a customer's cart and order are properly linked and managed, including handling stock management and price consistency.

Features

• Customer Management: Add, update, and delete customers.
• Product Management: Add, update, and delete products with stock tracking.
• Cart Management: Each customer has a cart to add and remove products, with automatic price calculation.
• Order Management: Customers can place orders from their cart. Orders maintain the product prices at the time of purchase.
• Stock Management: Tracks product stock and prevents orders if stock is insufficient.
• Order History: Customers can view their past orders with the prices at the time of purchase.

Entities

BaseEntity

A base class for all entities containing common fields:

• id: Primary key
• createdAt: Timestamp of creation
• updatedAt: Timestamp of last update

User

Represents a customer with fields:

• firstName
• lastName
• username
• password
• email
• role: Enum (ADMIN, CUSTOMER, BUSINESS)
• cart: One-to-one relationship with Cart
• orders: One-to-many relationship with Order

Product

Represents a product with fields:

• name
• description
• price
• stock

Cart

Represents a shopping cart with fields:

• user: One-to-one relationship with User
• products: Many-to-many relationship with Product including quantity
• totalPrice

Order

Represents an order with fields:

• user: Many-to-one relationship with User
• products: Many-to-many relationship with Product including quantity
• totalPrice
• orderCode: Unique code for the order

Services

CustomerService

Methods:

• addCustomer(UserDTO userDTO): Adds a new customer.
• getCustomer(String username): Retrieves a customer by username.

ProductService

Methods:

• createProduct(ProductDTO productDTO): Creates a new product.
• getProduct(Long productId): Retrieves a product by ID.
• updateProduct(ProductDTO productDTO): Updates an existing product.
• deleteProduct(Long productId): Deletes a product by ID.

CartService

Methods:

• getCart(String username): Retrieves the cart of a user.
• addProductToCart(String username, Long productId, int quantity): Adds a product to the cart.
• removeProductFromCart(String username, Long productId): Removes a product from the cart.
• emptyCart(String username): Empties the cart.

OrderService

Methods:

• placeOrder(String username): Places an order for the user.

• getOrderForCode(String orderCode): Retrieves an order by order code.

• getAllOrdersForCustomer(String username): Retrieves all orders for a customer.

• Running the Application

1. Clone the repository:

   git clone https://github.com/KeremShtyn/enoca.git
   cd enoca