Android Data Layer & Offline-First

Instructions

The Data Layer coordinates data from multiple sources.

1. Repository Pattern

• Role: Single Source of Truth (SSOT).
• Logic: The repository decides whether to return cached data or fetch fresh data.
• Implementation:

  class NewsRepository @Inject constructor(
      private val newsDao: NewsDao,
      private val newsApi: NewsApi
  ) {
      // Expose data from Local DB as the source of truth
      val newsStream: Flow<List<News>> = newsDao.getAllNews()