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 - Integrated web-view for problematic devices ✅
• Device-specific Camera Rules - API-driven zoom and camera settings per phone model ✅
• Loading State Management - Spinner while camera rules load, prevents mode jumping ✅
• 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 ✅

✅ Navigation & Integration

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

✅ Assets & Resources

• Static Image Assets: ✅
  • QR targeting arcs (arc.png) ✅
  • QR positioning markers (qrmarkers.png) ✅
  • UI action icons (play-button.png, flash-button.png) ✅
• WebAssembly Binary - qrtool.wx.js QR processing library (TODO: Add for QR detection)
• CSS Animations - Pure CSS animations for QR targeting arcs and loading spinner ✅

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
8. No External Dependencies - Cannot reference utils.js or other external files, all code must be inline

Current Status: CORE IMPLEMENTATION COMPLETE ✅

✅ COMPLETED FEATURES:

Core Infrastructure:

• Self-contained module at pages/emblemscanner/
• WeChat native camera with full overlay system
• Web-view camera fallback for problematic devices
• Device-specific camera rules from Themblem API
• Loading state management with spinner
• Debug mode with comprehensive diagnostics

UI & Visual Feedback:

• Animated QR targeting arcs (sm/lg sizes)
• QR markers overlay with proper positioning
• Inline modal system (verification, failed, guide, service)
• Torch/flash controls with visual feedback
• Dynamic hint text system
• Debug overlay with device/camera rule info

Integration & Navigation:

• Return page routing via query parameter
• Debug mode activation (5-tap or ?debug=1)
• Complete asset bundle (arc.png, qrmarkers.png, buttons)
• No external dependencies (all utility code inline)

🔧 NEXT STEPS:

1. QR Processing Integration - Add WebAssembly qrtool.wx.js library
2. Worker Implementation - iPhone WebAssembly worker setup
3. Frame Processing - QR code detection and validation logic
4. API Integration - Upload and verification pipeline
5. Performance Optimization - Frame throttling and batch processing