# Bible Reader - Features Backlog

This document tracks planned features and enhancements for the Bible Reader module based on 2025 state-of-the-art reading standards.

## ✅ Phase 1 - Core Reading Experience (COMPLETED)

### Typography & Customization ✅
- [x] Enhanced typography controls (letter/word/paragraph spacing)
- [x] Max line length control (50-100ch)
- [x] Font family selection (serif/sans-serif)
- [x] Theme support (light/dark/sepia)
- [x] Reading mode (distraction-free)

### Highlighting & Annotations ✅
- [x] Multi-color highlighting system (7 colors)
- [x] Inline annotations for highlights
- [x] Database persistence (Prisma)
- [x] Full CRUD API endpoints
- [x] Theme-aware highlight colors

### Mobile Experience ✅
- [x] Swipe left/right for chapter navigation
- [x] Tap zones for quick navigation (25% left/right)
- [x] Smooth page transitions (fade + scale)
- [x] Touch-optimized gestures
- [x] Settings toggles for mobile features

### Accessibility (WCAG AAA) ✅
- [x] Enhanced contrast ratios (7:1+ for all themes)
- [x] 2px visible focus indicators
- [x] ARIA live regions for screen readers
- [x] Skip navigation link
- [x] Full keyboard navigation
- [x] 200% zoom support without content loss

---

## 📋 Phase 2 - Advanced Reading Features

### Priority: HIGH

#### 1. Text-to-Speech (TTS)
**User Value:** Accessibility, multitasking, learning styles
**Complexity:** Medium
**Implementation:**
- [ ] Integrate Web Speech API
- [ ] Voice selection (male/female, languages)
- [ ] Speed control (0.5x - 2.0x)
- [ ] Pitch control
- [ ] Auto-advance to next chapter
- [ ] Highlight current verse being read
- [ ] Pause/resume/stop controls
- [ ] Background playback support
- [ ] Verse-level navigation (skip to verse)
- [ ] Persistent player bar (sticky)

**Technical Notes:**
- Use `window.speechSynthesis` API
- Store TTS preferences in localStorage
- Handle browser compatibility (fallback for unsupported browsers)
- Consider premium voices via third-party APIs (Amazon Polly, Google Cloud TTS)

#### 2. Parallel Bible View
**User Value:** Study, comparison, translation verification
**Complexity:** Medium
**Implementation:**
- [ ] Side-by-side layout (2-3 versions)
- [ ] Synchronized scrolling
- [ ] Version selector per pane
- [ ] Responsive layout (stack on mobile)
- [ ] Verse alignment highlighting
- [ ] Diff view for text differences
- [ ] Quick swap versions
- [ ] Column width adjustment
- [ ] Independent highlighting per version
- [ ] Export comparison view

**Technical Notes:**
- Use CSS Grid for flexible layout
- Implement scroll synchronization with IntersectionObserver
- Store selected versions in URL params
- Consider performance with multiple API calls

#### 3. Cross-References Panel
**User Value:** Context, deeper understanding, study
**Complexity:** Medium
**Implementation:**
- [ ] Fetch cross-references from database/API
- [ ] Display in collapsible sidebar
- [ ] Show preview on hover
- [ ] Click to navigate to reference
- [ ] Group by category (parallel passages, quotations, themes)
- [ ] Visual indicators in text (superscript letters)
- [ ] Filter by reference type
- [ ] Add custom cross-references
- [ ] Bidirectional linking
- [ ] Search cross-references

**Technical Notes:**
- Requires cross-reference data in database
- Use OpenBible.info cross-reference data or similar
- Implement lazy loading for performance
- Add caching for frequently accessed references

#### 4. Export Functionality
**User Value:** Sharing, printing, offline study
**Complexity:** Medium-High
**Implementation:**
- [ ] Export to PDF (with highlights/notes)
- [ ] Export to DOCX (Microsoft Word)
- [ ] Export to Markdown
- [ ] Export to plain text
- [ ] Include/exclude highlights option
- [ ] Include/exclude notes option
- [ ] Custom cover page
- [ ] Table of contents
- [ ] Verse number formatting options
- [ ] Print-optimized layout

**Technical Notes:**
- Use jsPDF or pdfmake for PDF generation
- Use docxtemplater for DOCX
- Server-side generation for better quality
- Consider file size limits
- Add download progress indicator

---

### Priority: MEDIUM

#### 5. Reading Plans with Progress Tracking
**User Value:** Discipline, goal achievement, spiritual growth
**Complexity:** High
**Implementation:**
- [ ] Pre-defined reading plans (Bible in 1 year, 90 days, etc.)
- [ ] Custom reading plan builder
- [ ] Daily reading reminders
- [ ] Progress tracking (days completed, streak)
- [ ] Calendar view of plan
- [ ] Catch-up mode (reschedule missed days)
- [ ] Plan sharing/importing
- [ ] Reading plan templates
- [ ] Notifications for daily readings
- [ ] Statistics and insights

**Technical Notes:**
- Database schema for reading plans
- Cron job for daily notifications
- Integration with calendar apps (iCal export)
- Push notifications via service worker

#### 6. Rich Text Study Notes
**User Value:** In-depth study, organization, knowledge retention
**Complexity:** Medium
**Implementation:**
- [ ] Rich text editor (WYSIWYG)
- [ ] Formatting options (bold, italic, lists, headers)
- [ ] Image embedding
- [ ] Link insertion
- [ ] Code snippets (for Hebrew/Greek)
- [ ] Markdown support
- [ ] Note templates
- [ ] Folder organization
- [ ] Search within notes
- [ ] Export notes separately

**Technical Notes:**
- Use TipTap or Quill editor
- Store notes in database (JSON format)
- Implement full-text search
- Add image upload to cloud storage

#### 7. Tags & Categories System
**User Value:** Organization, discovery, thematic study
**Complexity:** Medium
**Implementation:**
- [ ] Create custom tags
- [ ] Tag highlights and notes
- [ ] Tag autocomplete
- [ ] Tag-based filtering
- [ ] Tag cloud visualization
- [ ] Predefined tag library (themes, topics)
- [ ] Nested tags/categories
- [ ] Tag merging and renaming
- [ ] Tag usage statistics
- [ ] Share tags with community

**Technical Notes:**
- Many-to-many relationship in database
- Implement tag search with fuzzy matching
- Add tag color coding
- Consider hierarchical tags (parent/child)

#### 8. Speed Reading Mode
**User Value:** Time efficiency, comprehension training
**Complexity:** Medium
**Implementation:**
- [ ] RSVP (Rapid Serial Visual Presentation) mode
- [ ] Adjustable WPM (200-1000)
- [ ] Focus point indicator
- [ ] Chunking (display 1-3 words at a time)
- [ ] Pause on punctuation
- [ ] Comprehension checkpoints
- [ ] Eye training exercises
- [ ] Speed reading tutorials
- [ ] Progress tracking (WPM improvement)
- [ ] Customizable display area

**Technical Notes:**
- Use setInterval for word display timing
- Implement optimal fixation point (slightly left of center)
- Add keyboard shortcuts for control
- Store reading speed in user preferences

#### 9. Focus Mode Enhancements
**User Value:** Concentration, reduced distraction
**Complexity:** Low-Medium
**Implementation:**
- [ ] Dimming/masking of surrounding text
- [ ] Guided reading line (follows scroll)
- [ ] Spotlight mode (highlight current paragraph)
- [ ] Blur surrounding content
- [ ] Reading ruler overlay
- [ ] Focus intensity adjustment
- [ ] Auto-scroll with adjustable speed
- [ ] Bionic reading format (bold first letters)
- [ ] Sentence-by-sentence mode
- [ ] Breathing reminders during reading

**Technical Notes:**
- Use CSS filters and opacity
- Implement scroll-linked animations
- Add smooth auto-scroll with requestAnimationFrame
- Consider accessibility implications

#### 10. Custom Fonts & Dyslexia Support
**User Value:** Readability, accessibility, personal preference
**Complexity:** Medium
**Implementation:**
- [ ] Google Fonts integration
- [ ] Upload custom fonts
- [ ] Dyslexia-friendly fonts (OpenDyslexic, Lexend)
- [ ] Font preview
- [ ] Font size presets (small, medium, large, extra-large)
- [ ] Font weight adjustment
- [ ] Letter spacing presets for dyslexia
- [ ] Color filter overlays (yellow, blue, green)
- [ ] High contrast mode
- [ ] Font pairing recommendations

**Technical Notes:**
- Use @font-face for custom fonts
- Add font loading optimization
- Store font preferences in user profile
- Implement font subsetting for performance

---

## 📋 Phase 3 - Smart Features & Analytics

### Priority: FUTURE

#### 11. AI-Powered Smart Suggestions
**User Value:** Discovery, deeper study, personalized experience
**Complexity:** High
**Implementation:**
- [ ] Related verses based on current reading
- [ ] Thematic verse discovery
- [ ] Semantic search (not just keyword)
- [ ] AI-generated study questions
- [ ] Automatic verse categorization
- [ ] Personalized reading recommendations
- [ ] Smart highlighting suggestions
- [ ] Context-aware cross-references
- [ ] Reading pattern analysis
- [ ] AI study companion chatbot

**Technical Notes:**
- Integrate OpenAI API or local LLM (Ollama)
- Use vector embeddings for semantic search
- Implement RAG (Retrieval Augmented Generation)
- Cache AI responses for performance
- Consider API costs and rate limits

#### 12. Reading Analytics Dashboard
**User Value:** Insights, motivation, goal tracking
**Complexity:** High
**Implementation:**
- [ ] Reading heatmap (most-read passages)
- [ ] Time tracking per book/chapter
- [ ] Reading streak visualization
- [ ] Words read counter
- [ ] Comprehension metrics (re-read rate, highlight density)
- [ ] Reading speed over time
- [ ] Favorite books/chapters
- [ ] Reading goals (daily, weekly, monthly)
- [ ] Progress towards Bible completion
- [ ] Shareable achievements/badges

**Technical Notes:**
- Store reading events in time-series database
- Use Chart.js or Recharts for visualizations
- Implement background tracking (respectful of privacy)
- Add data export (GDPR compliance)

#### 13. Social & Collaboration Features
**User Value:** Community, accountability, shared learning
**Complexity:** High
**Implementation:**
- [ ] Share highlights with friends
- [ ] Public/private notes toggle
- [ ] Verse discussions (comments)
- [ ] Group study sessions
- [ ] Shared reading plans
- [ ] Follow friends' reading activity
- [ ] Reading groups/communities
- [ ] Social sharing (Twitter, Facebook)
- [ ] Collaborative notes (Google Docs style)
- [ ] Leaderboards (reading streaks, completion)

**Technical Notes:**
- Implement permissions system (public/private/friends)
- Real-time collaboration with WebSockets
- Privacy controls and moderation
- Social media API integration
- Consider COPPA compliance for younger users

#### 14. Enhanced Offline Experience
**User Value:** Reliability, data savings, offline access
**Complexity:** Medium-High
**Implementation:**
- [ ] Selective chapter download
- [ ] Smart pre-fetching based on reading history
- [ ] Background sync of highlights/notes
- [ ] Conflict resolution for offline edits
- [ ] Delta sync (only changed data)
- [ ] Offline search indexing
- [ ] Download progress indicator
- [ ] Storage management (clear cache)
- [ ] Offline-first architecture
- [ ] Service worker optimization

**Technical Notes:**
- Expand PWA capabilities
- Use IndexedDB for local storage
- Implement sync queue for offline changes
- Add background sync API
- Optimize for low storage devices

#### 15. Advanced Search & Discovery
**User Value:** Research, quick access, deep study
**Complexity:** Medium-High
**Implementation:**
- [ ] Full-text search across all versions
- [ ] Advanced filters (book, testament, keywords)
- [ ] Search within highlights/notes
- [ ] Regular expression search
- [ ] Proximity search (words near each other)
- [ ] Wildcard and fuzzy search
- [ ] Search history
- [ ] Saved searches
- [ ] Search suggestions/autocomplete
- [ ] Visual search results (context preview)

**Technical Notes:**
- Implement full-text search in database (PostgreSQL)
- Use Elasticsearch for advanced search
- Add search result ranking algorithm
- Cache frequent searches

---

## 🎯 Implementation Priority Matrix

| Feature | User Impact | Complexity | Priority | Estimated Time |
|---------|-------------|------------|----------|----------------|
| Text-to-Speech | High | Medium | 🔴 High | 2-3 weeks |
| Parallel Bible View | High | Medium | 🔴 High | 2 weeks |
| Cross-References Panel | High | Medium | 🔴 High | 2 weeks |
| Export Functionality | High | Medium-High | 🔴 High | 2-3 weeks |
| Reading Plans | Medium | High | 🟡 Medium | 3-4 weeks |
| Rich Text Notes | Medium | Medium | 🟡 Medium | 2 weeks |
| Tags & Categories | Medium | Medium | 🟡 Medium | 1-2 weeks |
| Speed Reading Mode | Medium | Medium | 🟡 Medium | 2 weeks |
| Focus Mode Enhanced | Low-Medium | Low-Medium | 🟡 Medium | 1 week |
| Custom Fonts | Low-Medium | Medium | 🟡 Medium | 1 week |
| AI Suggestions | Medium-High | High | 🔵 Future | 4-6 weeks |
| Analytics Dashboard | Medium | High | 🔵 Future | 3-4 weeks |
| Social Features | Medium | High | 🔵 Future | 4-6 weeks |
| Enhanced Offline | Low-Medium | Medium-High | 🔵 Future | 2-3 weeks |
| Advanced Search | Medium | Medium-High | 🔵 Future | 2-3 weeks |

---

## 📊 Technical Debt & Infrastructure

### Database Schema Updates Needed
- [ ] Cross-references table
- [ ] Reading plans table
- [ ] Study notes table (rich text)
- [ ] Tags table (many-to-many with highlights)
- [ ] Reading events table (analytics)
- [ ] User preferences expansion

### API Endpoints to Create
- [ ] `/api/cross-references` - Fetch cross-references
- [ ] `/api/reading-plans` - CRUD for reading plans
- [ ] `/api/notes` - Rich text study notes
- [ ] `/api/tags` - Tag management
- [ ] `/api/export` - Generate exports (PDF, DOCX, etc.)
- [ ] `/api/tts/voices` - Available TTS voices
- [ ] `/api/analytics/reading-events` - Track reading activity
- [ ] `/api/search/advanced` - Advanced search

### Third-Party Services to Integrate
- [ ] Web Speech API (built-in)
- [ ] Amazon Polly / Google Cloud TTS (premium voices)
- [ ] OpenBible.info API (cross-references)
- [ ] jsPDF / pdfmake (PDF generation)
- [ ] OpenAI API (AI features)
- [ ] Elasticsearch (advanced search)
- [ ] SendGrid/Mailgun (reading plan reminders)

### Performance Optimizations
- [ ] Implement virtual scrolling for long chapters
- [ ] Add code splitting for features
- [ ] Optimize bundle size (tree shaking)
- [ ] Add server-side caching (Redis)
- [ ] Implement CDN for static assets
- [ ] Database query optimization (indexes)
- [ ] Image optimization for exports

---

## 🔗 Resources & References

### Design Inspiration
- Kindle (Amazon) - Reading experience, highlighting
- Apple Books - Annotations, themes
- Readwise Reader - Highlighting, export
- Instapaper - Reading mode, fonts
- Medium - Typography, focus mode

### Technical Standards
- WCAG 2.1 Level AAA - Accessibility
- PWA Best Practices - Offline experience
- Material Design 3 - UI components
- Web Speech API - Text-to-speech
- Service Worker API - Background sync

### Data Sources
- OpenBible.info - Cross-references
- Blue Letter Bible API - Study resources
- BibleGateway - Verse references
- ESV API - Bible text
- YouVersion API - Reading plans

---

## 📝 Notes

- All new features should maintain WCAG AAA accessibility
- Mobile-first approach for all implementations
- Consider performance impact on low-end devices
- Ensure all features work offline where applicable
- Add comprehensive tests for new features
- Update documentation as features are added

---

**Last Updated:** 2025-10-10
**Current Phase:** Phase 1 Complete ✅
**Next Milestone:** Phase 2A - High Priority Features