Implement Repository Pattern for Todo Items

[sopheakim]

Implement Repository Pattern for Todo Items

Description

Task

Implement Repository Pattern for Todo Items: Create a repository class that abstracts data sources and provides a clean API for performing database operations. This separates data access logic from the rest of the application.

Acceptance Criteria

• Repository provides CRUD operations for Todo items
• Input validation is performed before database operations
• Error handling is implemented for all database interactions
• Utilizes Flow for reactive data streaming
• All methods are covered by unit tests
• Repository can be easily mocked for testing

Summary of Work

This pull request introduces a robust Repository Pattern implementation for managing Todo items, providing a clean and abstracted data access layer.

Key Implementation Details:

• Created TodoRepository class to encapsulate data access logic
• Implemented error handling and validation for Todo operations
• Used Kotlin's Result type for method returns to handle success and failure scenarios
• Added input validation before database operations
• Supported core CRUD operations for Todo items
• Utilized Flow for reactive data streams
• Ensured thread-safe and exception-resistant data access

Repository Features:

• Get all todos
• Get todos by completion status
• Get todo by ID
• Add new todo with validation
• Update existing todo
• Delete todo by object or ID
• Error handling for all operations

Architecture Benefits:

• Separates data access logic from business logic
• Provides a single source of truth for data operations
• Enables easy testing and mocking of data layer
• Improves code maintainability and scalability

Changes Made

• Created TodoRepository class with comprehensive CRUD methods
• Added input validation for Todo items before database operations
• Implemented error handling using Kotlin's Result type
• Used Flow for reactive data streaming
• Created test suite to validate repository operations

Tests

• Test adding valid todo item
• Test adding invalid todo item
• Test updating todo item
• Test deleting todo item
• Test retrieving todos by completion status

Signatures

Staking Key

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Public Key

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