Database Service

The DatabaseService is the heart of Nokken's data persistence layer, providing a structured interface to the SQLite database.

Key Responsibilities

• Managing the SQLite database schema and versioning
• Providing CRUD operations for all entity types
• Abstracting database operations from the rest of the application
• Handling error management through a custom DatabaseException class

Interactions with Other Services

• Feature modules: All feature modules interact with the database service to store and retrieve data
• State providers: Riverpod state providers use the database service to fetch data
• ValidationService: Database operations use validation to ensure data integrity

Database Schema

The database consists of several tables:

• medications: Stores medication information
• taken_medications: Records which medications have been taken
• bloodwork: Stores lab results and appointment information
• mood_entries: Stores daily mood and wellness metrics