• User login and register functionalities.
• Global search functionality for finding hotels by hotel name, hotel description, room type, city name and other properties with text fields.
• Managing images and thumbnails for cities, hotels and rooms.
• Show popular cities which are the most visited ones.
• Email sending service that sends an email to the user when the user creates a booking containing all of the needed information like total price, exact location for the hotel on the map and other details.
• Admin page to search, add, update and delete entities.

Used Clean Architecture which provides great separation of concerns between business logic and external layers and minimal changes for replacing external frameworks like ASP.NET or EF Core. The system has 4 main layers:

1. Domain layer:
   • Contains the shared models and abstractions for business logic.
   • Has no dependencies on other layers.
2. Application layer:
   • Contains the implementation of business logic requirements that are declared in the domain layer and all of the validation logic.
   • Depends on the abstractions in domain layer.

3. Infrastructure:
   • Contains the implementation of external services that are declared in the domain layer like data repositories and email service.
   • Depends on the abstractions in domain layer.
4. Presentation (API) layer:
   • Contains the implementation of the APIs using the help of business logic abstractions in the domain layer.
   • Depends on the domain layer and has no direct interactions with data repositories.

• Secure APIs with JWT for authentication and Role-Based Access Control (RBAC) for regular users and admins.
• Passwords are securely stored in the database using Microsoft.AspNet.Identity.IPasswordHasher which stores hashed passwords using Password Salting.
• Used SQL Server as a database using the help of EF Core as an ORM.
• Unit testing for units that contains testable logic, architecture testing to make sure that Clean Architecture principles aren't violated and integration testing for the APIs.
• Well-documented clean codes and APIs with best-practices.
• Robust validations for creating and updating entities.
• Logging using Serilog.
• Rate limiting middleware to limit the number of requests for a client in a customizable time interval.
• Meaningful response status codes and messages.
• Api versioning.

• Comprehensive dynamic and up-to-date documentation using SwaggerUI which is available when running the application in development environment.
• Documentation using Postman: https://documenter.getpostman.com/view/30810910/2sA2xiXsN9

• The project is built on .NET 8.0
• External packages: AutoMapper, SixLabors.ImageSharp, Serilog, FluentValidation, Moq, AutoFixture, FluentAssertion, xUnit, NetArchTest.
• Download the project and open the solution file HotelBooking.sln.
• Run the migration in Infrastructure layer to update the database.
• The system has an admin that's seeded into the database using seeding migration, the credentials are: Username: admin, Password: admin123.