Sitecore MVP Selections API

Solution Architecture Overview

1. Layered Structure

The solution is organized into several projects, each with a distinct responsibility:

• Mvp.Selections.Api
  The main API layer. Exposes endpoints for managing MVP applications, users, contributions, reviews, and related entities. Implements business logic through service classes (e.g., ApplicationService, UserService, ContributionService).

• Mvp.Selections.Client
  A .NET client library for consuming the API. Provides strongly-typed models and extension methods for easy integration into other .NET applications. Links to shared models from the API project.

• Mvp.Selections.Domain
  Contains core domain models (e.g., User, Application, Contribution, MvpType, Country, etc.) and enums. Used across all layers to ensure consistency.

• Mvp.Selections.Data
  Implements repository interfaces and data access logic. Repositories abstract the persistence layer and provide methods for querying and manipulating domain entities.

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2. Key Architectural Patterns

• Dependency Injection
  All services and repositories are injected via constructors, promoting loose coupling and testability.

• Repository Pattern
  Data access is abstracted behind repository interfaces (e.g., IApplicationRepository). This allows for flexible data storage and easier unit testing.

• Service Layer
  Business logic is encapsulated in service classes (e.g., ApplicationService, UserService). These coordinate between repositories and enforce business rules.

• DTOs and Models
  API and client projects use shared models for requests and responses, ensuring type safety and reducing duplication.

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3. Extensibility and Integration

• NuGet Packaging
  The client library can be packaged and distributed via NuGet for easy reuse.

• Configuration
  The client supports configuration via environment variables or settings files.

• Token Providers
  Authentication is abstracted via token providers, allowing integration with various authentication mechanisms.

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4. Typical Flow Example

1. A web application uses the client library to interact with the API.
2. The client authenticates requests using a token provider.
3. API controllers delegate requests to service classes.
4. Services use repositories to fetch or persist data.
5. Domain models are used throughout for consistency.

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5. Technology Stack

• .NET 8 / C# 12
• ASP.NET Core (for API)
• Microsoft.Extensions (for DI, configuration)
• Entity Framework Core (likely for data access, based on repository pattern)
• NuGet (for packaging/distribution)

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Summary:
The solution follows a clean, layered architecture with separation of concerns between API, client, domain, and data layers. It uses modern .NET practices for dependency injection, configuration, and extensibility, making it maintainable and scalable.