# 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
- [x] **Native Camera Interface** - WeChat camera component integration ✅
- [x] **Web-view Camera Fallback** - Integrated web-view for problematic devices ✅
- [x] **Device-specific Camera Rules** - API-driven zoom and camera settings per phone model ✅
- [x] **Loading State Management** - Spinner while camera rules load, prevents mode jumping ✅
- [ ] **Dynamic Zoom Control** - Initial zoom + QR-found zoom adjustment (TODO: Implement)
- [x] **Torch/Flash Control** - Manual and automatic torch management ✅
- [ ] **Auto-torch Detection** - API-based torch recommendation system (TODO: Implement API integration)

### ✅ UI Components & Visual Feedback
- [x] **QR Targeting Overlay** - Animated corner arcs for QR positioning ✅
- [x] **Visual State Indicators** - Progress states (searching, found, verifying) ✅
- [x] **Hint Text System** - Dynamic user guidance messages ✅
- [x] **Debug Overlay** - Development/diagnostic information display ✅
- [x] **Modal System**: ✅
  - [x] Verification spinner (`verifyspin`) ✅
  - [x] Failed verification (`verifyfailed`) ✅
  - [x] Scan guide tutorial (`scanguide`) ✅
  - [x] Service modal (`servicemodal`) ✅
  - [x] 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
- [x] **Device Detection** - Phone model identification and global data storage ✅
- [x] **Processing Mode Selection** - Worker vs synchronous based on device type ✅
- [x] **Camera Sensitivity Adjustment** - Device-specific camera sensitivity settings ✅

### ✅ Navigation & Integration
- [x] **Entry Point Configuration** - Support for return page query parameter ✅
- [x] **Return Page Routing** - Navigate to specified page after successful scan and verification ✅

### ✅ Assets & Resources
- [x] **Static Image Assets**: ✅
  - [x] QR targeting arcs (`arc.png`) ✅
  - [x] QR positioning markers (`qrmarkers.png`) ✅ 
  - [x] UI action icons (`play-button.png`, `flash-button.png`) ✅
- [ ] **WebAssembly Binary** - `qrtool.wx.js` QR processing library (TODO: Add for QR detection)
- [x] **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:**
- [x] Self-contained module at `pages/emblemscanner/` 
- [x] WeChat native camera with full overlay system
- [x] Web-view camera fallback for problematic devices  
- [x] Device-specific camera rules from Themblem API
- [x] Loading state management with spinner
- [x] Debug mode with comprehensive diagnostics

**UI & Visual Feedback:**
- [x] Animated QR targeting arcs (sm/lg sizes)
- [x] QR markers overlay with proper positioning
- [x] Inline modal system (verification, failed, guide, service)
- [x] Torch/flash controls with visual feedback
- [x] Dynamic hint text system
- [x] Debug overlay with device/camera rule info

**Integration & Navigation:**
- [x] Return page routing via query parameter
- [x] Debug mode activation (5-tap or ?debug=1)
- [x] Complete asset bundle (arc.png, qrmarkers.png, buttons)
- [x] 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