Code Structure and Design Patterns

This outline provides an overview of the code structure and design patterns used in the PacmanBlazor project. It aims to guide developers in understanding the organization, interaction, and overall design principles applied within the codebase.

1. Project Structure

The PacmanBlazor project is structured to promote modularity, maintainability, and scalability.

• Client: Contains the Blazor web application code.

  • Pages: User interface components and routing logic.
  • Shared: Reusable components and logic accessible across the application.
  • Components: Specific game-related UI components like the game board, ghosts, and Pacman.

• Server: Houses the API endpoints and logic for interacting with the game state.

  • Data: Model classes and data access logic.
  • Controllers: API endpoints for handling client requests.
  • Services: Business logic and services responsible for managing game state and functionality.

2. Design Patterns

a. Model-View-ViewModel (MVVM):

• This pattern is employed in the Blazor application.
• The Pages folder represents the views, responsible for displaying information and handling user interactions.
• The Shared folder provides the view models, encapsulating the logic and data for each view.
• This separation of concerns helps keep the UI logic independent of the data logic.

b. Dependency Injection:

• The project leverages dependency injection throughout the codebase for enhanced testability and maintainability.
• The Program.cs file configures the dependency injection container, registering services and interfaces for various components.
• The Startup.cs file defines the application’s configuration, including the dependency injection setup.

c. Singleton Pattern:

• The GameService class implements the singleton pattern.
• This pattern ensures that only one instance of the GameService is created, allowing it to manage the game state globally across different components.
• The GameService is registered as a singleton in the dependency injection container.

3. Object-Oriented Principles

The PacmanBlazor project utilizes object-oriented principles for code organization and reusability.

• Encapsulation: Components like Pacman, Ghost, and Wall encapsulate their data and behavior.
• Inheritance: The Ghost base class defines common ghost properties and behaviors, while different ghost types inherit from it and specialize their features.
• Polymorphism: Different ghost types can be treated as the same type through the Ghost base class, allowing for flexible game logic.

4. Code Examples

a. Dependency Injection:

Client/Program.cs

b. Singleton Pattern:

Client/Services/GameService.cs

c. Object-Oriented Principles:

Client/Components/GameBoard.razor

Client/Components/Pacman.razor

d. MVVM Pattern:

Client/Pages/Game.razor