Tag Scanning Integration Requirements
Tag Scanning Integration Requirements
Overview
This document specifies the technical requirements for integrating QR code and NFC tag scanning capabilities into the object creation workflow. The system supports dual functionality: tag association with new objects AND spatial relationship assignment via container tag scanning.
Functional Requirements
FR1: Scanning Capabilities
- FR1.1: Support QR code scanning via device camera
- FR1.2: Support NFC tag reading on compatible devices
- FR1.3: Provide fallback manual entry option
- FR1.4: Support batch scanning for multiple tags
FR2: Integration Points
- FR2.1: Embed scan button prominently in CreateObjectModal header
- FR2.2: Support dual context scanning (tag assignment + spatial relationships)
- FR2.3: Enable scanning in batch creation workflows
- FR2.4: Integrate with spatial hierarchy navigation
- FR2.5: Support post-creation tag assignment workflows
FR3: Validation & Conflicts
- FR3.1: Validate tag format and cryptographic signatures
- FR3.2: Check for existing tag assignments
- FR3.3: Handle manufacturer-issued tags
- FR3.4: Provide conflict resolution UI
FR4: User Experience
- FR4.1: Single-action scan button with clear dual purpose indication
- FR4.2: Real-time camera overlay with detection feedback
- FR4.3: Context-aware dialog flows for known vs unknown tags
- FR4.4: Spatial relationship assignment prompts for container tags
- FR4.5: Accessible scanning instructions and error recovery
Non-Functional Requirements
NFR1: Performance
- NFR1.1: QR code detection < 500ms
- NFR1.2: NFC read completion < 1s
- NFR1.3: Validation response < 300ms
NFR2: Security
- NFR2.1: Cryptographic validation of tags
- NFR2.2: Secure storage of scanned data
- NFR2.3: Protection against tag cloning
NFR3: Compatibility
- NFR3.1: Support iOS 14+ and Android 10+
- NFR3.2: Graceful degradation on unsupported devices
- NFR3.3: Cross-browser compatibility
Technical Architecture
Frontend Components
CreateObjectModal/
├── ScanButton (header-level scan trigger)
├── CameraInterface (QR/NFC detection overlay)
├── TagResolutionDialog (known/unknown tag workflows)
└── SpatialContextPrompt (container relationship assignment)
Components/scanning/
├── TagScanner (core scanning logic)
├── CameraOverlay (visual detection feedback)
├── TagValidator (cryptographic verification)
└── ScanResultHandler (workflow coordination)
State Management
interface ScanState {
isScanning: boolean;
detectedTag?: string;
resolutionResult?: TagResolutionResult;
spatialContext?: SpatialContext;
conflictData?: TagConflictData;
}
interface TagResolutionResult {
type: 'KNOWN_OBJECT' | 'UNKNOWN_SPECIFIC' | 'UNKNOWN_GENERAL' | 'ERROR';
objectId?: string;
classId?: string;
canEdit?: boolean;
spatialContext?: string;
}
GraphQL Schema Requirements
- resolveIdentifier: Tag lookup and classification
- createObjectWithTag: Combined object creation and tag assignment
- assignSpatialRelationshipByTag: Spatial context via container tags
- tagConflictResolution: Handle tag reassignment workflows
Error Handling
- Validation Errors: Malformed tag codes, invalid signatures
- Permission Errors: Insufficient rights for tag assignment
- Conflict Errors: Tag already assigned to different object
- Camera Errors: Hardware access, detection failures
Implementation Priorities
Phase 1: Core Dual Functionality (Sprint 1)
- ScanButton Integration: Add prominent scan trigger to CreateObjectModal
- Basic QR Detection: Camera interface with QR code recognition
- Tag Resolution: Implement resolveIdentifier query and basic dialog flows
- Spatial Context: Support container tag scanning for spatial relationships
Phase 2: Enhanced User Experience (Sprint 2)
- Advanced Dialogs: Complete known/unknown tag resolution workflows
- Conflict Resolution: Handle tag assignment conflicts gracefully
- Visual Feedback: Enhanced camera overlay with detection indicators
- Error Recovery: Comprehensive error handling and user guidance
Phase 3: Advanced Features (Sprint 3)
- NFC Integration: Add NFC tag reading capabilities
- Batch Workflows: Support tag scanning in bulk creation scenarios
- Offline Support: Queue scanned tags for later processing
- Analytics: Track scanning patterns and success rates
Dependencies
- Camera permissions API
- Web NFC API (where available)
- QR code scanning library
- Cryptographic validation library