Solution

[jghg02]

Solution

Overview

This PR introduces the solution for TakeHome.

Including BirdListViewController for displaying a list of birds and a BirdDetailViewController for detailed bird information. Users can select a bird to view its details, see community notes, and add new notes. The implementation follows a clean architecture approach, utilizing a ViewModel to manage business logic and data binding.

Video

Simulator.20Screen.20Recording.20-.20iPhone.2015.20Pro.20Max.20-.202024-08-13.20at.2022.mp4

Architecture Overview

The implementation follows a clean architecture approach, which separates concerns into distinct layers, promoting testability, maintainability, and scalability. The key architectural components involved are the ViewControllers, ViewModel, and Use Cases.

1. ViewControllers

• BirdListViewController:

  • Acts as the View in the architecture, responsible for displaying the list of birds to the user.
  • Handles user interactions (e.g., selecting a bird) and delegates the processing of these actions to the ViewModel.
  • Updates the UI based on the data it receives from the ViewModel.

• BirdDetailViewController:

  • Also acts as a View, managing the display of detailed information about a selected bird, including its community notes.
  • Allows users to add new notes, updating the UI immediately and delegating the note creation to the ViewModel.

2. ViewModel

• The ViewModel acts as the Presenter or Controller in the architecture, acting as an intermediary between the ViewControllers and the domain layer (use cases).
• It contains the business logic for loading bird data and managing notes.
• Uses Combine to observe and react to data changes, ensuring the ViewControllers are updated automatically.
• Encapsulates application logic by providing a clean API to the ViewControllers.

3. Use Cases

• LoadBirdsUseCase:

  • Encapsulates the logic for retrieving the list of birds from a data source (e.g., API, database).
  • Abstracts away the details of data retrieval from the ViewModel, making the business logic easy to test and modify.

• AddNoteUseCase:

  • Manages the process of adding a new note to a bird, ensuring that the note is persisted in the data source.
  • Isolates the note-adding logic from the ViewModel, ensuring a clear separation of concerns.

4. Data Binding and Reactive Updates

• The Combine framework is used for data binding, allowing the ViewModel to publish changes to the ViewControllers in a reactive manner.
• This ensures that the UI is always in sync with the underlying data, improving the responsiveness and user experience.

Summary

This architecture provides a clear separation of concerns:

• The ViewControllers handle UI and user interactions.
• The ViewModel manages application logic and data transformations.
• The Use Cases encapsulate the business logic, ensuring that the core functionality is isolated and testable.

This approach ensures a modular, maintainable, and scalable codebase, making it easier to add new features, test existing functionality, and maintain the code over time.