Ep.3: CarRental API - Project Structure and Code Setup

Project follows a Layered Architecture, which is a good practice for building scalable and maintainable applications. Each layer has its specific responsibilities. This structure promotes separation of concerns, making it easier to maintain and test each layer independently.

Layers Overview

1. Api Layer (ASP.NET Core Web API):

• This layer is the gateway to our system, handling incoming HTTP requests and delivering well-structured responses.
• Contains controllers, program.cs and appsettings JSON file for our application configurations
• Project dependencies: Reference Application and Data Layers

2. Application Layer:

• Encompasses business rules and logic.
• Contains components to implement these rules, and profiles for AutoMapper, which helps in mapping DTOs to domain entities and vice versa.
• Project dependencies: Reference Domain Layer

3. Data Layer:

• Manages the interaction with the database.
• Includes DbContext, Migrations, and Repository implementations.
• Project dependencies: Reference Domain Layer

4. Domain Layer:

• Defines entities that represent the business objects like User and Car entities.
• Contains repository interfaces, which define the contract for data access.
• Project dependencies: Utility Layer

5. Utility Layer:

• Houses helper methods and internal/external services.
• Provides utility functions that can be shared across different layers.
• Project dependencies: Reference Contracts Layer

6. Contracts Layer:

• Includes DTOs (Data Transfer Objects), API Requests, API Responses, App Settings Configurations, and validations (using FluentValidation).
• Defines the communication contracts between API and outside world.
• Project dependencies: Reference Commons Layer

7. Commons Layer:

• Contains constants and enums that are shared across the application.
• Provides a centralized place for maintaining commonly used elements.
• No project reference, indicating it's a standalone layer.

Get Started

1. Clone the repo

git clone https://github.com/WanjohiSammy/Ep.3-Car-Rental-API.git

2. Add appsettings.Development.json file in CarRental.Api layer:

{
  "Logging": {
    "LogLevel": {
      "Default": "Information",
      "Microsoft.AspNetCore": "Warning"
    }
  },
  "ConnectionStrings": {
    "DefaultConnection": "Data Source=(localdb)\\MSSQLLocalDB;Initial Catalog=CarRentalStore;Integrated Security=True;Connect Timeout=30;Encrypt=True;Trust Server Certificate=False;Application Intent=ReadWrite;Multi Subnet Failover=False"
  }
}

3. Build the project to restore packages and ensure it follows the Project Structure.

Project Structure Diagram