feat: implement analytics privacy preservation with differential privacy (#407)#1
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sheyman546 wants to merge 19 commits into
Open
feat: implement analytics privacy preservation with differential privacy (#407)#1sheyman546 wants to merge 19 commits into
sheyman546 wants to merge 19 commits into
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Automatically switch light/dark mode from Android lux readings with hysteresis and debounced consecutive readings, plus a Settings toggle and manual override when the user picks a theme. Co-authored-by: Cursor <cursoragent@cursor.com>
…ormance (rinafcode#403) Replace generic ActivityIndicator spinners with content-aware skeleton screens that match each screen's final UI layout: - CourseViewerSkeleton, QuizSkeleton, SettingsSkeleton, SubscriptionSkeleton, DataGridSkeleton - Updated Suspense fallbacks and component-level loaders in course-viewer, quiz, settings, profile, MobileCourseViewer, SubscriptionManager, AdvancedDataGrid - Fixed duplicate MobileQuizManager declaration bug in app/quiz.tsx - Cleaned up unused imports and orphaned styles - Added 8 new tests in SkeletonScreens.test.tsx Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
…nafcode#411) Add sessionRestorationService that detects crashes and restores users to their last active screen on next launch. - New service persists a "session-active" flag to AsyncStorage on launch and clears it on clean shutdown. If the flag survives, the previous session crashed. - Route changes are saved to a snapshot on every navigation so the user can be returned to the exact screen they were on. - crashReportingService calls captureOnCrash() on fatal errors to ensure the snapshot is preserved. - Root layout detects crash on mount and shows an Alert offering to restore the previous session or start fresh. Snapshots older than 1 hour are discarded. - 14 unit tests cover the full lifecycle: begin, save, crash detect, restore, and clean shutdown paths. Co-authored-by: CommandCodeBot <noreply@commandcode.ai>
…fcode#402) - Add parseSemver to parse semver strings into major/minor/patch - Add shouldInvalidateCache: major/minor bumps invalidate, patch preserves - Add getStoredCacheVersion/setStoredCacheVersion for AsyncStorage persistence - Add handleCacheVersionUpdate: clears AsyncStorage + image cache on breaking change - 20 tests covering all scenarios
…rotocol-for-websocket feat(socket): add protobuf-style binary websocket protocol
…#410) - Add Trie data structure with O(k) insert/search and O(k+n) autocomplete - Replace linear suggestion filter in MobileSearch with module-level Trie - Add 25 unit tests including 10k-item <10ms performance assertion
Add adaptive theme based on ambient light sensor
…eton-loading-states feat: implement contextual skeleton loading states for perceived performance (rinafcode#403)
…h-recovery feat: implement automatic crash recovery with session restoration (rinafcode#411)
…oning-402 feat: implement app content cache versioning with smart updates
Binary protocol
…-autocomplete feat: Trie-based instant autocomplete for search (rinafcode#410)
feat(analytics): implement event sampling and stabilize secure storag…
Add automated performance budget enforcement
…acy (rinafcode#407) - Add differentialPrivacy utility with Laplace and Gaussian noise mechanisms, randomized response for booleans, and sanitizeEventProperties helper - Add PrivacyBudgetManager to track and enforce cumulative epsilon budget per session; events are suppressed when the budget is exhausted - Update MobileAnalyticsService to sanitize numeric/boolean event properties with DP noise before forwarding to the analytics backend - Update AnalyticsProvider to accept privacyConfig and noiseType props - Add 23 unit tests covering all mechanisms and edge cases (23/23 passing)
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Summary
Closes rinafcode#407
Implements differential privacy for the mobile analytics pipeline so that numeric and boolean event properties are noise-sanitized before leaving the device.
Changes
New files
src/utils/differentialPrivacy.ts— Laplace and Gaussian noise mechanisms, randomized response for booleans, andsanitizeEventPropertieshelper.src/utils/privacyBudgetManager.ts—PrivacyBudgetManagertracks cumulative ε consumption per session and suppresses events once the budget is exhausted.tests/utils/differentialPrivacy.test.ts— 23 unit tests (23/23 passing).Modified files
src/services/mobileAnalytics.ts—trackEventsanitizes properties with DP noise and checks the budget before forwarding events.src/components/mobile/AnalyticsProvider.tsx— AcceptsprivacyConfigandnoiseTypeprops and forwards them to the service on mount.Privacy guarantees
Testing