Create DashboardService with business logic for Carousel-style dashboard:
Service Methods:
- NewDashboardService: Create service instance with injected dependencies
- GetDashboardSections: Fetch all collections (system + user) with their items
* Gets system collections (user_id = NULL) by query type
* Gets user collections with manual + auto-assigned items
* Filters hidden collections based on user preferences
* Reorders collections based on user custom order
* Sorts by priority if no custom order exists
- GetDashboardPreferences: Fetch user dashboard preferences for library
- UpsertDashboardPreferences: Save or update user dashboard preferences
- RestoreSystemCollection: Reset user's copy of system collection to defaults
Helper Methods:
- filterHiddenCollections: Remove hidden collections from results
- reorderCollections: Reorder sections based on user preference
- sortByPriority: Sort sections by priority (lower numbers first)
- getCollectionItemsByQueryType: Return items for system collections by query type
- getUserCollectionItems: Return items for user collections (manual + auto-assign)
Type Conversion Helpers:
- mediaItemsToListMediaItemsRow: Convert MediaItems to ListMediaItemsRow for rule evaluation
- getCollectionItemsRowToMediaItems: Convert GetCollectionItemsForDashboardRow to MediaItems
Architecture Compliance:
- Service layer holds all business logic (reusable by SSR, API, mobile)
- Returns database types (type safety at DB layer)
- Handler converts to API types (clean JSON contracts)
- Uses existing database queries and collection service
- Procedural/imperative style (no OOP)
- Follows existing pattern from collections.go