Barf App

Design Patterns & Architecture

Patterns Used:

Repository Pattern

• Abstracts data persistence
• Separate interfaces from implementations
• Makes testing easier with mock repositories

Service Layer Pattern

• Contains business logic
• Coordinates between multiple repositories
• Handles transactions and complex operations

Dependency Injection

• Loose coupling between components
• Better testability
• Uses constructor injection

Factory Pattern

• For database connections
• For creating service instances
• For repository instantiation

Project Structure

bookmanager/ ├── cmd/ │ └── api/ │ └── main.go # Application entry point ├── internal/ │ ├── config/ │ │ └── config.go # Configuration management │ ├── domain/ │ │ ├── book.go # Domain models │ │ └── inventory.go │ ├── repository/ │ │ ├── interfaces.go # Repository interfaces │ │ └── postgres/ │ │ ├── book.go │ │ └── inventory.go │ ├── service/ │ │ ├── book.go │ │ └── inventory.go │ └── handler/ │ └── http/ │ ├── book.go │ └── inventory.go ├── pkg/ │ ├── validator/ │ │ └── validator.go # Common validation utilities │ └── logger/ │ └── logger.go # Logging utilities └── web/ └── src/ ├── components/ │ ├── BookList.tsx │ └── InventoryGrid.tsx └── pages/ ├── Books.tsx └── Inventory.tsx