Architecture

This is a polyglot web application built with multiple backend implementations (PHP, Python, Go) and a TypeScript/React frontend. The architecture follows a modular design with clear separation between presentation (React components), business logic (services), and utilities. The backend services expose user management functionality through a repository pattern, while the frontend provides a component-based UI with forms, buttons, and cards. The codebase also includes Liquid templates for server-side rendering, suggesting a hybrid rendering approach.

The application demonstrates a multi-language microservices or experimentation architecture where different backend implementations (PHP's Application class, Python's Application class, and Go components) coexist, possibly serving different purposes or representing alternative implementations. The frontend communicates with these services through standardized interfaces, with shared utility functions for data formatting and validation across both client and server.

Components

React Frontend (src)

📁 src/

Provides the user interface with reusable UI components including forms, buttons, and cards. Handles client-side rendering and user interactions.

Key Exports:

• App
• Button
• Form
• Card
• CardHeader
• CardBody
• formatDate
• capitalize
• delay

Dependencies: services/user.ts for user data, utils/helpers.ts for formatting and validation

PHP Backend

📁 ./index.php, services/

Serves as one backend implementation handling application initialization and user management through a service layer with repository pattern.

Key Exports:

• Application
• bootstrap
• UserService

Dependencies: UserRepositoryInterface, utils/helpers.php for formatting and validation

Python Backend

📁 ./app.py, services/

Provides an alternative backend implementation with async capabilities, application initialization, and user service management.

Key Exports:

• Application
• async_fetch_data
• UserService

Dependencies: DateFormatter from utils/helpers.py, format_date utility

User Services Layer

📁 services/

Implements business logic for user management across PHP and Python backends using repository pattern for data access abstraction.

Key Exports:

• UserService (PHP)
• UserService (Python)
• UserRepositoryInterface

Dependencies: Backend frameworks, utility functions

Utilities

📁 utils/

Provides shared utility functions for data formatting, validation, and sanitization across PHP and Python backends.

Key Exports:

• format_date
• validate_input
• sanitize_string
• DateFormatter

Dependencies: None - leaf nodes

TypeScript Services

📁 src/services/

Client-side service layer for managing API communication and data fetching from the frontend.

Key Exports:

• UserService constructor
• user service methods

Dependencies: Backend APIs

Liquid Templates

📁 snippets/, sections/

Server-side templates for rendering dynamic content, likely used for email templates, SSR pages, or Shopify theme components.

Key Exports:

• Template partials and sections

Dependencies: Backend rendering engines

Data Flow

Data flows from the backend services (PHP/Python/Go) through RESTful APIs to the TypeScript frontend. User requests originate from React components (App, Form, Button) which call the client-side UserService. This service communicates with backend Application instances bootstrapped through index.php or app.py. Backend UserService classes interact with repositories (following the Repository pattern via UserRepositoryInterface) to fetch/persist data. Utility functions (formatDate, validate_input, sanitize_string) transform and validate data at both client and server boundaries. Async operations in Python (async_fetch_data) suggest event-driven or concurrent data processing. The Liquid templates provide an additional rendering path for server-generated HTML.

Design Patterns

• Repository Pattern (UserRepositoryInterface for data access abstraction)
• Service Layer Pattern (UserService encapsulating business logic)
• Component-Based Architecture (React components in src/)
• Dependency Injection (constructor injection in UserService classes)
• Bootstrap Pattern (application initialization through bootstrap function)
• Factory Pattern (Application class construction)
• Async/Await Pattern (Python async_fetch_data for concurrent operations)

Extending the Codebase

To extend the codebase: (1) Add new React components in src/components/ following the existing Button/Form/Card patterns; (2) Implement additional service methods in UserService classes across PHP/Python backends maintaining interface consistency; (3) Create new repository implementations by implementing UserRepositoryInterface for different data sources; (4) Add utility functions in utils/ directories for cross-cutting concerns; (5) Extend the Application class in either PHP or Python to add middleware, routing, or configuration; (6) Add new Liquid templates in snippets/ or sections/ for additional server-rendered views; (7) Create new TypeScript services in src/services/ for additional API integrations; (8) Add validation rules by extending validate_input and sanitize_string functions.