React Native clean Architecture | folder structure |Pure JavaScript/TypeScript code

React Native, Clean Architecture helps in structuring the codebase effectively, ensuring long-term maintainability and separation of concerns.

Core Principles of Clean Architecture
Clean Architecture is based on four primary principles:

Separation of Concerns – Different parts of the application handle specific responsibilities.
Independence – Layers should be independent of frameworks, databases, or UI details.
Testability – Code should be easy to test with unit tests.
Maintainability – The application should be easy to modify without affecting other parts.
Layers of Clean Architecture in React Native
Clean Architecture divides an application into four layers, ensuring better structure and scalability:

1. Entities (Domain Layer)
This is the core business logic of the application.
Contains use cases, domain models, and interfaces.
Pure JavaScript/TypeScript code, independent of React Native.
Example: A User entity with properties like id, name, and methods to validate user details.
2. Use Cases (Application Layer)
Contains the business rules and defines what the app should do.
Implements application logic such as fetching data, processing, and executing workflows.
Interacts with the data layer through interfaces.
Example: A FetchUserProfileUseCase fetches user data from the repository and formats it for presentation.
3. Data Layer (Infrastructure Layer)
Handles API calls, local storage (AsyncStorage, SQLite), and third-party libraries.
Contains repositories that provide data from different sources.
Implements the interface contracts defined in the domain layer.
Example: UserRepositoryImpl fetching data from an API and caching it in AsyncStorage.
4. Presentation Layer (UI Layer)
Contains React Native components, screens, and state management (Redux, Zustand, or Context API).
Receives data from the application layer and renders UI accordingly.
Example: A UserProfileScreen that displays user details received from the use case.

source code : https://drive.google.com/file/d/1abo-48FyfFYYLIYjGTcnGOxwLGiFbJEA/view?usp=sharing

React Native Dark Theme:
https://www.youtube.com/watch?v=Jsd9O8-em6c

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