338 lines
No EOL
9 KiB
Markdown
338 lines
No EOL
9 KiB
Markdown
# Product Requirements Document: Auto-Save Functionality
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## Executive Summary
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Implement an intelligent auto-save system for all admin forms and editors to prevent data loss and improve the content creation experience.
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## Problem Statement
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Currently, users must manually save their work in the admin interface, which can lead to:
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- Data loss if the browser crashes or connection is interrupted
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- Anxiety about losing work during long editing sessions
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- Inefficient workflow with frequent manual saves
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- No recovery mechanism for unsaved changes
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## Goals & Success Metrics
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### Primary Goals
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1. Prevent data loss during content creation
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2. Provide seamless, unobtrusive saving experience
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3. Enable recovery from unexpected interruptions
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4. Maintain data consistency and integrity
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### Success Metrics
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- 0% data loss from browser crashes or network issues
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- <3 second save latency for typical content
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- 95% of saves complete without user intervention
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- User satisfaction with editing experience improvement
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## User Stories
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### As a content creator
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- I want my work to be automatically saved so I don't lose progress
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- I want to see clear feedback about save status
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- I want to recover my work if something goes wrong
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- I want control over when auto-save is active
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### As a site administrator
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- I want to ensure data integrity across all saves
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- I want to minimize server load from frequent saves
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- I want to track save patterns for optimization
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## Functional Requirements
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### Core Auto-Save System
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#### 1. Smart Debouncing
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- **Content changes**: 2-second delay after user stops typing
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- **Metadata changes**: Immediate save for critical fields
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- **Navigation events**: Immediate save before leaving page
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- **Keyboard shortcut**: Cmd/Ctrl+S for manual save
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#### 2. Save States & Feedback
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- **Idle**: No pending changes
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- **Saving**: Active save in progress with spinner
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- **Saved**: Confirmation with timestamp
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- **Error**: Clear error message with retry option
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- **Conflict**: Detection and resolution UI
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#### 3. Data Persistence
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- **Server-first**: Primary storage in database
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- **Local backup**: IndexedDB for offline/recovery
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- **Conflict detection**: Version tracking with timestamps
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- **Partial saves**: Only send changed fields
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### Visual Design
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#### Status Indicator
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```
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States:
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- Idle: No indicator (clean UI)
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- Saving: "Saving..." with subtle spinner
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- Saved: "All changes saved" (fades after 2s)
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- Error: Red indicator with retry button
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- Offline: "Working offline" badge
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```
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#### Positioning
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- Fixed position in editor header
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- Non-intrusive, doesn't shift content
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- Responsive to different screen sizes
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- Accessible color contrast
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### API Design
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#### New Endpoints
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```typescript
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// Auto-save endpoint
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POST /api/posts/[id]/autosave
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Body: {
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content?: JSONContent,
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title?: string,
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metadata?: object,
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lastModified: timestamp
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}
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Response: {
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success: boolean,
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lastModified: timestamp,
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conflict?: {
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serverVersion: object,
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serverModified: timestamp
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}
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}
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// Recovery endpoint
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GET /api/posts/[id]/recover
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Response: {
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localDraft?: object,
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serverVersion: object,
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timestamps: {
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local?: timestamp,
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server: timestamp
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}
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}
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```
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### Integration Points
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#### Form Components to Update
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1. **EssayForm.svelte** - Blog posts and essays
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2. **ProjectForm.svelte** - Project case studies
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3. **AlbumForm.svelte** - Album descriptions
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4. **SimplePostForm.svelte** - Simple text posts
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5. **PhotoPostForm.svelte** - Photo posts with captions
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#### Composer Integration
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- Hook into TipTap editor's `onUpdate` event
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- Track content changes separately from metadata
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- Handle rich media embeds appropriately
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## Technical Requirements
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### Frontend Architecture
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#### Auto-Save Hook (`useAutoSave.svelte.ts`)
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```typescript
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class AutoSave {
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private state = $state<'idle' | 'saving' | 'saved' | 'error'>('idle')
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private lastSaved = $state<Date | null>(null)
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private saveTimer: NodeJS.Timeout | null = null
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private saveQueue: Set<string> = new Set()
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constructor(options: AutoSaveOptions) {
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// Initialize with endpoint, auth, debounce settings
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}
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track(field: string, value: any): void
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save(immediate?: boolean): Promise<void>
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recover(): Promise<RecoveryData>
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reset(): void
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}
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```
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#### Svelte 5 Integration
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- Use `$state` rune for reactive state
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- Use `$effect` for side effects and cleanup
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- Use `$derived` for computed values
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- Maintain compatibility with existing stores
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### Backend Requirements
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#### Database Schema Updates
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```sql
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-- Add version tracking
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ALTER TABLE posts ADD COLUMN version INTEGER DEFAULT 1;
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ALTER TABLE posts ADD COLUMN last_auto_save TIMESTAMP;
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-- Auto-save drafts table
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CREATE TABLE auto_save_drafts (
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id SERIAL PRIMARY KEY,
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entity_type VARCHAR(50),
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entity_id INTEGER,
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user_id INTEGER,
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content JSONB,
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created_at TIMESTAMP DEFAULT NOW()
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);
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```
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#### Performance Optimizations
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- Implement request coalescing for rapid changes
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- Use database transactions for consistency
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- Add Redis caching for conflict detection
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- Implement rate limiting per user
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### Security Considerations
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- Validate user ownership before auto-save
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- Sanitize content to prevent XSS
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- Rate limit to prevent abuse
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- Encrypt local storage data
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- Audit trail for all saves
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## Non-Functional Requirements
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### Performance
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- Save latency <500ms for text content
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- <2MB memory overhead per form
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- Debounce efficiency >90% reduction in requests
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- Support 100+ concurrent editors
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### Reliability
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- 99.9% save success rate
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- Graceful degradation on network issues
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- Automatic retry with exponential backoff
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- Data recovery from last 24 hours
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### Usability
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- Zero configuration for basic use
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- Clear, non-technical error messages
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- Intuitive conflict resolution
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- Keyboard accessible
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### Compatibility
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- Chrome 90+, Firefox 88+, Safari 14+
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- Mobile responsive
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- Works with screen readers
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- Progressive enhancement
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## Implementation Plan
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### Phase 1: Core Infrastructure (Week 1-2)
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- [ ] Create `useAutoSave` hook
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- [ ] Implement debouncing logic
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- [ ] Add basic status component
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- [ ] Create auto-save API endpoint
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### Phase 2: Form Integration (Week 2-3)
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- [ ] Integrate with EssayForm
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- [ ] Integrate with ProjectForm
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- [ ] Add keyboard shortcuts
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- [ ] Implement local storage backup
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### Phase 3: Advanced Features (Week 3-4)
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- [ ] Conflict detection and resolution
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- [ ] Offline support with service worker
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- [ ] Recovery interface
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- [ ] Performance monitoring
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### Phase 4: Polish & Testing (Week 4-5)
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- [ ] UI/UX refinements
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- [ ] Comprehensive testing
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- [ ] Documentation
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- [ ] Performance optimization
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## Testing Strategy
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### Unit Tests
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- Debounce logic validation
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- State management correctness
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- API error handling
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- Local storage operations
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### Integration Tests
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- Form component integration
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- API endpoint validation
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- Conflict resolution flow
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- Recovery scenarios
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### E2E Tests
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- Complete save flow
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- Network interruption handling
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- Multi-tab scenarios
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- Mobile experience
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### Performance Tests
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- Load testing with concurrent users
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- Memory leak detection
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- Network bandwidth usage
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- Database query optimization
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## Rollout Strategy
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1. **Beta Testing**: Deploy to staging with select users
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2. **Gradual Rollout**: Enable for 10% → 50% → 100% of forms
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3. **Monitoring**: Track save success rates and user feedback
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4. **Iteration**: Refine based on real-world usage
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## Future Enhancements
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### Version 2.0
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- Real-time collaboration indicators
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- Revision history with diff view
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- Auto-save templates and drafts
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- AI-powered content suggestions
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### Version 3.0
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- Multi-device sync
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- Offline-first architecture
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- Advanced merge conflict resolution
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- Team collaboration features
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## Risks & Mitigations
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| Risk | Impact | Mitigation |
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|------|--------|------------|
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| Data corruption | High | Implement checksums and validation |
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| Performance degradation | Medium | Rate limiting and request batching |
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| User confusion | Low | Clear UI feedback and documentation |
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| Storage limits | Low | Implement cleanup and quotas |
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## Dependencies
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### External Libraries
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- None required (uses native Svelte/SvelteKit features)
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### Internal Systems
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- Existing authentication system
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- Toast notification system
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- TipTap editor integration
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- Prisma database client
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## Acceptance Criteria
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- [ ] Auto-save activates within 2 seconds of changes
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- [ ] Visual feedback appears for all save states
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- [ ] Manual save button remains functional
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- [ ] Recovery works after browser crash
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- [ ] No data loss in normal operation
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- [ ] Performance metrics meet targets
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- [ ] Accessibility standards met
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- [ ] Documentation complete
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## Appendix
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### Competitive Analysis
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- **Notion**: Instant save with "Saving..." indicator
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- **Google Docs**: Real-time with conflict resolution
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- **WordPress**: Auto-save drafts every 60 seconds
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- **Medium**: Continuous save with version history
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### User Research Insights
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- Users expect auto-save in modern editors
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- Visual feedback reduces anxiety
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- Recovery options increase trust
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- Performance is critical for user satisfaction
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---
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**Document Version**: 1.0
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**Last Updated**: 2025-01-30
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**Author**: System Architecture Team
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**Status**: Ready for Implementation |