themblem/scanner/QR_SCANNER_MODULE_PROGRESS.md

QR Scanner Module Development Progress

Project Goal

Create a self-contained, portable QR scanning page module that can be easily integrated into other WeChat Mini Programs. The module should include all scanning functionality in a single directory and accept an entry query parameter to redirect to different pages upon successful scan and verification.

Feature Checklist - Extracted from Existing Code

✅ Core QR Processing

• WebAssembly QR Tool Integration - qrtool.wx.js library for QR code processing (TODO: Add library)
• Dual Processing Modes:
  • Worker-based processing (iPhone devices) - worker/index.js (TODO: Implement)
  • Synchronous processing (Android devices) - precheck.js (TODO: Implement)
• QR Pattern Validation - Emblem-specific QR code pattern matching (TODO: Add validation)
• Frame Pre-checking - Validate QR frames before full processing (TODO: Implement)
• Angle Detection - QR code angle detection and correction (TODO: Implement)

✅ Camera System

• Native Camera Interface - WeChat camera component integration ✅
• Web-view Camera Fallback - pages/camwebview/ for problematic devices (TODO: Add fallback)
• Device-specific Camera Rules - API-driven zoom and camera settings per phone model (TODO: Implement API integration)
• Dynamic Zoom Control - Initial zoom + QR-found zoom adjustment (TODO: Implement)
• Torch/Flash Control - Manual and automatic torch management ✅
• Auto-torch Detection - API-based torch recommendation system (TODO: Implement API integration)

✅ UI Components & Visual Feedback

• QR Targeting Overlay - Animated corner arcs for QR positioning ✅
• Visual State Indicators - Progress states (searching, found, verifying) ✅
• Hint Text System - Dynamic user guidance messages ✅
• Debug Overlay - Development/diagnostic information display ✅
• Modal System: ✅
  • Verification spinner (verifyspin) ✅
  • Failed verification (verifyfailed) ✅
  • Scan guide tutorial (scanguide) ✅
  • Service modal (servicemodal) ✅
  • Tooltip component (tooltip) ✅

✅ API Integration & Data Flow

• Image Upload System - Multi-frame submission to backend
• Verification Pipeline - QR code verification with themblem.com API
• Camera Rules API - Device-specific camera configuration fetching
• Auto-torch API - Torch recommendation based on QR code
• Event Tracking - Frame upload and analytics events
• Session Management - Unique session ID generation and tracking

✅ Phone Model & Runtime Configuration

• Device Detection - Phone model identification and global data storage
• Processing Mode Selection - Worker vs synchronous based on device type
• Camera Sensitivity Adjustment - Device-specific camera sensitivity settings
• Performance Optimization - Frame upload throttling and batch processing

✅ Navigation & Integration

• Entry Point Configuration - Support for return page query parameter ✅
• Return Page Routing - Navigate to specified page after successful scan and verification ✅

✅ Error Handling & Recovery

• Verification Failure Flow - Retry and service contact options
• Upload Failure Recovery - Network error handling
• Worker Failure Fallback - Graceful degradation to sync mode
• Camera Permission Handling - User permission flow management

✅ Assets & Resources

• Static Image Assets:
  • QR targeting arcs (/static/arc.png)
  • QR positioning markers (/static/qrmarkers.png)
  • UI action icons (/assets/play-button.png, /assets/flash-button.png)
• WebAssembly Binary - qrtool.wx.js QR processing library
• Animation Assets - Lottie animations for loading states

Module Structure Design

/qr-scanner-module/
├── qr-scanner.js           # Main page logic
├── qr-scanner.wxml         # UI template  
├── qr-scanner.wxss         # Styling
├── qr-scanner.json         # Page configuration
├── lib/
│   ├── qrtool.wx.js        # WebAssembly QR library
│   ├── precheck.js         # QR validation logic
│   ├── upload.js           # API communication
│   └── utils.js            # Utility functions
├── components/             # UI components
│   ├── tooltip/
│   ├── verifyspin/  
│   ├── verifyfailed/
│   ├── scanguide/
│   └── servicemodal/
├── worker/
│   └── index.js            # WebAssembly worker
└── assets/                 # Static resources
    ├── images/
    └── animations/

Integration Requirements

Required Query Parameters

• return_page - Target page to navigate to after successful verification

Required Global Dependencies

• WeChat Mini Program camera API
• WebAssembly support
• Worker thread support (iOS)
• Canvas 2D context for image processing

External API Dependencies

• {server_url}/api/v1/camera-rules/ - Camera configuration
• {server_url}/api/v1/check-auto-torch/ - Torch recommendations
• Verification endpoint for QR code validation
• Event tracking endpoints

Success Criteria

1. Self-contained Module - All functionality within single directory
2. Platform Portability - Easy integration into other mini programs
3. Device Compatibility - Support for iOS/Android with appropriate fallbacks
4. Performance Optimization - Efficient WebAssembly + Worker threading
5. Robust Error Handling - Graceful failure modes and user feedback
6. Configurable Integration - Flexible redirect and mode parameters
7. Asset Independence - Bundled resources with minimal external dependencies

Current Status: PLANNING PHASE ⏳

Next steps:

1. Create module directory structure
2. Extract and consolidate existing code
3. Implement portable integration interface
4. Test cross-platform compatibility