ECommerce API - Backend 🖥️

This is the REST API for the Maxi Market project, built on ASP.NET Core 10 Web API and using Entity Framework Core to interact with SQL Server.

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🏛️ Architecture & Design Principles

The backend is developed following SOLID principles and a clean, layered architecture:

1. Controllers (Controllers/): HTTP entry points that handle REST requests and return structured responses. All controllers delegate logic to the service layer.
2. Services (Services/): Business logic layer divided into interfaces and implementation classes (Interfaces/ and Implementation/). It promotes decoupling through dependency injection.
3. Data Transfer Objects (DTOs/): Classes representing the data contract exposed to the outside. They are divided into ReadDTO (reading), CreateDTO (creation), and UpdateDTO (editing) to prevent the leakage of sensitive or unnecessary properties (such as passwords).
4. Models (Models/): Represent the physical tables of the SQL Server database.
5. Auto Mapping: AutoMapper is used to perform bidirectional conversions between entities and DTOs in an automated and transparent way.

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🛠️ Technologies Used

• Runtime & Framework: .NET 10 (C#)
• Data Access: Entity Framework Core 10
• Database: Microsoft SQL Server
• Key Libraries: AutoMapper & AutoMapper.Extensions.Microsoft.DependencyInjection

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📋 API Endpoints

Controller	Method	Route	Description
Auth	POST	/api/auth/login	Log in user and return simulated token
Brands	GET	/api/brands	Retrieve all registered brands
Brands	GET	/api/brands/{id}	Retrieve a brand by ID
Brands	POST	/api/brands	Register a new brand
Brands	PUT	/api/brands/{id}	Update an existing brand
Brands	DELETE	/api/brands/{id}	Delete a brand from the database
Categories	GET	/api/categories	Retrieve all categories
Categories	GET	/api/categories/{id}	Retrieve a category by ID
Categories	POST	/api/categories	Register a new category
Categories	PUT	/api/categories/{id}	Update an existing category
Categories	DELETE	/api/categories/{id}	Delete a category
Products	GET	/api/products	Retrieve products with query filters
Products	GET	/api/products/{id}	Retrieve details of a product by ID
Products	POST	/api/products	Register a new product
Products	PUT	/api/products/{id}	Update an existing product
Products	DELETE	/api/products/{id}	Delete a product

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⚙️ Configuration & Execution

Prerequisites

• .NET 10 SDK installed.
• Running instance of SQL Server (LocalDB or other).

Running the App

1. Open the appsettings.json file and update the connection string DefaultConnection if necessary:

   "ConnectionStrings": {
     "DefaultConnection": "Server=YOUR_SERVER;Database=ECommerceDb;Trusted_Connection=True;TrustServerCertificate=True;"
   }

2. Restore NuGet packages and build the backend:

   dotnet build

3. Run the backend server:

   dotnet run

   Note: On the first run, the application will automatically create the database if it does not exist and seed initial test data for brands, categories, users, and products.