🏠 Overview › 🎯 Features ›🎯 Background Sync

Background Sync

Feature Detail

high complexity extracted Offline & Sync Confidence: 100%
7
Components
106
Shared
0
User Stories
Yes
Analyzed

Description

Background Sync ensures that queued offline mutations and data refreshes are processed automatically when the device regains connectivity, without requiring the user to open the app. The feature leverages platform-specific background execution APIs to schedule periodic sync jobs that upload pending changes and download fresh data from the backend. A job scheduler manages retry logic, exponential backoff, and failure reporting, ensuring robust delivery of queued records even under intermittent network conditions. Sync status and any conflicts are surfaced to the user through non-intrusive in-app notifications upon next foreground launch.

User Flow

Background Sync user flow
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Analysis

Business Value

Without background sync, users returning to connectivity would need to manually trigger a sync, adding friction and creating a risk that they forget to do so — leaving the backend out of date and causing coordinators and org admins to see stale data. Automatic background processing removes this responsibility from the user entirely, making the offline experience seamless and invisible. For organizations like HLF that track 380+ individual registrations per year per peer mentor, even small sync friction can compound into significant data quality problems. Background sync also ensures that new assignments, notifications, and contact updates are available immediately when the user opens the app, improving responsiveness and trust in the platform.

Implementation Notes

On iOS, the implementation uses WorkManager via the flutter_workmanager plugin, which wraps BGTaskScheduler for background fetch and processing tasks within Apple's constraints. On Android, WorkManager provides reliable deferred execution with battery-optimized scheduling. The Job Scheduler component registers tasks at login and reschedules them after each successful sync run. The sync job reads the offline mutation queue from the local SQLite database, batches mutations by entity type, calls the REST API, and marks records as synced or failed. Exponential backoff (initial 30s, max 1h) is applied to failed records. Sync progress and any unresolvable conflicts are written to a status table read by the foreground app on next launch, which then displays appropriate user-facing messages via the notification system.

Components (113)

Service Layer (3)

service Background Sync Service high service Background Sync Service high service Conflict Resolution Service high

Data Layer (1)

data Sync Status Store medium

Infrastructure (3)

infrastructure Job Scheduler high infrastructure Job Scheduler high infrastructure Workmanager Platform Adapter medium

Shared Components

These components are reused across multiple features

Service Layer (34)

service Auth API Client medium Shared service Password Policy Validator low Shared service Permission Validation Middleware high Shared service Activity Service medium Shared service Event API Client low Shared service Event Repository Service medium Shared service File Upload Service high Shared service Expense Type Service high Shared service Contact Service medium Shared service STT Service medium Shared service Keyboard Navigation Service medium Shared service Screen Reader Support Service high Shared service Screen Reader Support Service high Shared service Localization Service medium Shared service Localization Service medium Shared service Repository Data Source Router high Shared service Role Scope Resolver low Shared service Audit Log Service medium Shared service Audit Log Service medium Shared service Report Access Control Service medium Shared service Export Audit Logger low Shared service Report Export Service medium Shared service Report Export Service medium Shared service Terminology Context Provider medium Shared service Terminology Service medium Shared service Terminology Service medium Shared service Feature Registry Loader low Shared service Hierarchy Access Control Service high Shared service Hierarchy Scope Resolver medium Shared service Association Service medium Shared service Audit Log Service high Shared service DPA Content Provider low Shared service Cookie Consent Service medium Shared service Cookie Consent Service medium Shared

Data Layer (22)

data Token Store low Shared data Token Store low Shared data Secure Token Store medium Shared data Secure Token Store medium Shared data Activity Store low Shared data Event List Cache Store low Shared data Expense Type Store medium Shared data Contact Store low Shared data Contact Store low Shared data Notes Store low Shared data Assignment Count Store low Shared data Push Token Repository low Shared data Notification Audit Log Store low Shared data Push Token Store low Shared data Push Token Store low Shared data Organization Impact Settings Repository low Shared data Accessibility Preferences Store low Shared data Local SQLite Database high Shared data Sync Queue medium Shared data Report Store high Shared data Mobile Terminology Store medium Shared data Security Metrics Repository medium Shared

Infrastructure (38)

infrastructure Keychain/Keystore Adapter low Shared infrastructure JWT Claims Extractor low Shared infrastructure Organization Labels Adapter low Shared infrastructure Keychain/Keystore Adapter low Shared infrastructure Auth API Client medium Shared infrastructure REST API Client medium Shared infrastructure WCAG Accessibility Adapter low Shared infrastructure Registration API Client low Shared infrastructure Accounting API Client high Shared infrastructure PDF Renderer Adapter medium Shared infrastructure File Share Adapter low Shared infrastructure FCM/APNs Adapter high Shared infrastructure Share Sheet Adapter low Shared infrastructure Share Plus Adapter low Shared infrastructure Platform Accessibility Bridge medium Shared infrastructure Semantics Override Adapter high Shared infrastructure URL Launcher Adapter low Shared infrastructure Markdown Content Renderer low Shared infrastructure Network Connectivity Monitor low Shared infrastructure Expense Receipt Storage Adapter low Shared infrastructure Audit Log Writer low Shared infrastructure Feature Flag Checker low Shared infrastructure Logo Upload Adapter low Shared infrastructure Terminology Constants Registry low Shared infrastructure Feature Flag Cache Adapter low Shared infrastructure Org Scope JWT Resolver medium Shared infrastructure Association Audit Logger low Shared infrastructure Token Blocklist medium Shared infrastructure Analytics Tracker low Shared infrastructure SEO Metadata Config low Shared infrastructure Analytics Tracker low Shared infrastructure Analytics Tracker low Shared infrastructure Sales Analytics Tracker low Shared infrastructure Email Provider Adapter low Shared infrastructure Terms of Service Content Provider low Shared infrastructure Legal PDF Asset Provider low Shared infrastructure Consent-Gated Script Loader low Shared infrastructure Legal Page Layout low Shared

User Stories

No user stories have been generated for this feature yet.