Technical Documentation: Notification Analytics

Architecture

Managed as a standalone analytics dashboard that consumes processed time-series and categorical data from the NotificationService. It uses the fl_chart library for performant rendering on the Flutter UI thread.

Technical Details

• File Path: lib/screens/notification_analytics_screen.dart
• Data Integration: Fetches up to 500 records via NotificationService.list() for local aggregation.
• Library: fl_chart (Pie/Bar/Line charts).

Analytics Logic

• KPI Calculation: _typeCounts getter iterates through the notification list to generate a frequency map.
• Timeline Grouping: Groups notifications by date string (YYYY-MM-DD), allowing for categorical stacking in bar charts.
• Severity Mapping: Defines a global _typeColors and _typeGradients map to ensure visual consistency.

Performance Optimization

• Memoization: Computed getters are recalculated only when the underlying notification list changes.
• Rendering Boundaries: Uses RepaintBoundary around individual chart widgets to isolate their paint cycles.