Project Structure Documentation

This document comprehensively describes the organization and purpose of key files and folders within your NestJS application, providing a clear understanding of their roles and contributions.

.
└── project root/
    └── src/
        ├── auth/
        │   ├── auth.controller.ts
        │   ├── auth.dto.ts
        │   ├── auth.modal.ts
        │   ├── auth.module.ts
        │   ├── auth.service.ts
        │   ├── jwt-auth.guard.ts
        │   └── jwt.strategy.ts
        ├── email/
        │   ├── email.controller.ts
        │   └── email.service.ts
        ├── modules/
        │   └── <Resources>/
        │       ├── <Resource>.controller.ts
        │       ├── <Resource>.model.ts
        │       ├── <Resource>.module.ts
        │       ├── <Resource>.service.ts
        │       ├── create-<Resource>.dto.ts
        │       └── update-<Resource>.dto.ts
        ├── shared/
        │   ├── constants/
        │   │   └── index.ts
        │   ├── decorator/
        │   │   ├── public.ts
        │   │   └── validator.ts
        │   ├── interceptor/
        │   │   └── response.interceptor.ts
        │   └── utils/
        │       └── common.ts
        ├── app.controller.ts
        ├── app.module.ts
        ├── app.service.ts
        └── main.ts

Top-Level Folders:

1. assets: (Optional)

   • email-templates: (Optional)
     • Contains HTML templates used for generating email content (e.g., verification, password reset).
     • Typically utilized by the email module or related services for email sending.
     • File examples: email-verify.hbs, reset-password.hbs.

2. src: (Core application source code)

   • auth:
     • Encompasses functionalities related to user authentication and authorization.
     • Includes:
       • auth.controller.ts: Defines controllers for handling authentication-related API requests (e.g., login, registration).
       • auth.dto.ts: Contains Data Transfer Objects (DTOs) for authentication data in requests and responses.
       • auth.model.ts: Defines the Mongoose model schema for representing users or authentication-related data.
       • auth.module.ts: The NestJS module definition for authentication, importing and exporting necessary components.
       • auth.service.ts: Implements business logic and interactions with user data or external authentication providers.
       • jwt-auth.guard.ts: Provides JWT-based authentication guards for protecting secure routes.
       • jwt.strategy.ts: Defines the JWT authentication strategy for verifying and extracting user information from JWT tokens.
   • email:
     • Handles email sending functionalities.
     • Includes:
       • email.controller.ts: Defines controllers for email-related API requests (e.g., sending emails).
       • email.service.ts: Provides services for sending email notifications or triggering email sending logic.
   • modules:
     • Contains individual modules for specific entities or resources within your application, following a consistent structure:
       • <Resource>.controller.ts: Defines controllers for handling API requests related to the entity (e.g., blog.controller.ts).
       • <Resource>.model.ts: Defines the Mongoose model schema for the entity (e.g., blog.model.ts).
       • <Resource>.module.ts: The NestJS module definition for the entity, importing and exporting relevant components.
       • <Resource>.service.ts: Implements business logic and data access operations related to the entity (e.g., blog.service.ts).
       • create-<Resource>.dto.ts: Defines the DTO used for creating new instances of the entity (e.g., create-blog.dto.ts).
       • update-<Resource>.dto.ts: Defines the DTO used for updating existing instances of the entity (e.g., update-blog.dto.ts).
   • shared:
     • Provides reusable components across the application:
       • constants: Stores fixed values and configurations used throughout the application (e.g., API endpoints, roles).
       • decorators: Custom decorators for controllers, services, or entities to enforce access control, validation, or other functionalities.
       • interceptors: Classes for intercepting and modifying HTTP requests and responses (e.g., logging, response formatting).
       • utils: Common utility functions used in various parts of the application (e.g., data manipulation, validation).
   • app.controller.ts: Defines the main application controller, handling general or root-level API requests.
   • app.module.ts: The root module of the application, importing all other modules and configuring services.
   • app.service.ts: (Optional) Provides an optional global service for application-wide logic.
   • main.ts: The entry point for running the NestJS application.

Benefits of this Structure:

• Modularity and Organization: Promotes a well-organized codebase, dividing functionalities into reusable and maintainable modules.
• Dependency Management: Simplifies dependency management by grouping related components within modules.
• Clarity and Understanding: Makes the project structure clearer, aiding in development, testing, and collaboration.
• Reusability: Encourages code reuse across modules, preventing code duplication and inconsistencies.