Accessibility Settings Repository
Component Detail
Description
Persists user-level accessibility preferences including screen reader warning suppression preferences, announcement verbosity level, and whether the sensitive field guard is enabled. Reads and writes to local device storage using the shared persistence layer.
accessibility-settings-repository
Summaries
The Accessibility Settings Repository ensures that users' personal accessibility preferences — such as suppressing redundant screen reader warnings or adjusting announcement verbosity — are reliably preserved across app sessions and device restarts. Retaining these preferences removes friction for users with disabilities, directly improving app usability for a segment of users who often face disproportionate barriers in digital products. This contributes to compliance with accessibility standards increasingly mandated by app store policies and regional legislation, while also differentiating the product by demonstrating genuine commitment to inclusive design. A seamless, preference-respecting experience for screen reader users reduces support contacts, improves app store ratings within accessibility-focused communities, and strengthens the brand's reputation for responsible product development.
This is a low-complexity, self-contained component with no declared external dependencies, making it straightforward to scope and deliver within a single sprint. It reads and writes to local device storage via the shared persistence layer, so coordination with whichever team owns that layer is the primary scheduling dependency. The reactive settingsStream interface requires the team to confirm which state management pattern (e.g., streams, ChangeNotifier, Riverpod) is in use app-wide before implementation, to ensure consistency. Testing should cover: default value initialisation on first launch, persistence round-trips, stream emission on update, and reset-to-defaults behaviour.
Since this component is not shared across features, its blast radius is limited, but any delay here blocks the SensitiveFieldPrivacyGuard and announcement verbosity features from being configurable at runtime.
Accessibility Settings Repository wraps local device storage to provide a typed, reactive interface for user-level accessibility preferences. The settingsStream method should emit updates via a StreamController or equivalent reactive primitive to allow widgets and services to rebuild or respond without polling. The merging of defaults with user overrides on first launch must be idempotent — typically implemented by reading stored keys and filling in missing entries from a defaults map, rather than overwriting existing data. The isSensitiveFieldGuardEnabled and getAnnouncementVerbosity accessors are synchronous convenience methods that should read from an in-memory cache populated at initialization via loadFromStorage, keeping widget build paths free of async gaps.
Consider implementing a migration strategy in the storage layer for future schema changes, ensuring stored preferences remain valid across app updates without data loss or silent resets.
Responsibilities
- Persist and retrieve user accessibility preference settings
- Provide reactive streams for settings changes across the app
- Merge defaults with user overrides on first launch
- Expose a reset-to-defaults operation
Interfaces
getSettings()
updateSetting(key, value)
resetToDefaults()
settingsStream()
isSensitiveFieldGuardEnabled()
getAnnouncementVerbosity()
Related Data Entities (3)
Data entities managed by this component