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# Camera Implementation Documentation
## Overview
This document describes how camera functionality is implemented across the
TimeSafari application. The application uses cameras for two main purposes:
1. QR Code scanning
2. Photo capture
## Components
### QRScannerDialog.vue
Primary component for QR code scanning in web browsers.
**Key Features:**
- Uses `qrcode-stream` for web-based QR scanning
- Supports both front and back cameras
- Provides real-time camera status feedback
- Implements error handling with user-friendly messages
- Includes camera switching functionality
**Camera Access Flow:**
1. Checks for camera API availability
2. Enumerates available video devices
3. Requests camera permissions
4. Initializes camera stream with preferred settings
5. Handles various error conditions with specific messages
### PhotoDialog.vue
Component for photo capture and selection.
**Key Features:**
- Cross-platform photo capture interface
- Image cropping capabilities
- File selection fallback
- Unified interface for different platforms
## Services
### QRScanner Services
#### WebDialogQRScanner
Web-based implementation of QR scanning.
**Key Methods:**
- `checkPermissions()`: Verifies camera permission status
- `requestPermissions()`: Requests camera access
- `isSupported()`: Checks for camera API support
- Handles various error conditions with specific messages
#### CapacitorQRScanner
Native implementation using Capacitor's MLKit.
**Key Features:**
- Uses `@capacitor-mlkit/barcode-scanning`
- Supports both front and back cameras
- Implements permission management
- Provides continuous scanning capability
### Platform Services
#### WebPlatformService
Web-specific implementation of platform features.
**Camera Capabilities:**
- Uses HTML5 file input with capture attribute
- Falls back to file selection if camera unavailable
- Processes captured images for consistent format
#### CapacitorPlatformService
Native implementation using Capacitor.
**Camera Features:**
- Uses `Camera.getPhoto()` for native camera access
- Supports image editing
- Configures high-quality image capture
- Handles base64 image processing
#### ElectronPlatformService
Desktop implementation (currently unimplemented).
---
**See also**:
- `.cursor/rules/features/camera_technical.mdc` for
detailed technical implementation
- `.cursor/rules/features/camera_platforms.mdc` for platform-specific details
**Status**: Active camera implementation overview
**Priority**: Medium
**Estimated Effort**: Ongoing reference
**Dependencies**: None
**Stakeholders**: Development team, Camera feature team
- iOS and Android devices
- Desktop platforms
- Various network conditions
## Model Implementation Checklist
### Before Camera Implementation
- [ ] **Platform Analysis**: Understand camera requirements across all platforms
- [ ] **Feature Planning**: Plan QR scanning and photo capture features
- [ ] **Service Planning**: Plan camera service architecture
- [ ] **Testing Strategy**: Plan testing across web, mobile, and desktop
### During Camera Implementation
- [ ] **Component Development**: Implement QRScannerDialog and PhotoDialog
- [ ] **Service Implementation**: Implement platform-specific camera services
- [ ] **Permission Handling**: Implement proper camera permission management
- [ ] **Error Handling**: Implement graceful error handling for camera failures
### After Camera Implementation
- [ ] **Cross-Platform Testing**: Test camera functionality across all platforms
- [ ] **Feature Validation**: Verify QR scanning and photo capture work correctly
- [ ] **Performance Testing**: Ensure camera performance meets requirements
- [ ] **Documentation Update**: Update camera implementation documentation