# PDF Module - Files Created

## Core Module Files (13 files)

### 1. Main Service
📄 pdf.service.ts (495 lines)
   - Main PDF processing orchestration
   - Text, formula, and exercise extraction coordination
   - Caching and batch processing
   - Search and preview functionality

### 2. Text Extractor Processor
📄 processors/text-extractor.processor.ts (462 lines)
   - PDF text extraction with pdf-parse
   - Language detection (Spanish/English)
   - Structure detection (headers, tables, lists)
   - Text normalization and sanitization
   - Key term extraction

### 3. Formula Parser Processor
📄 processors/formula-parser.processor.ts (573 lines)
   - Mathematical formula detection
   - Text to LaTeX conversion
   - Support for matrices, vectors, integrals, etc.
   - Formula dependency tracking
   - Confidence scoring

### 4. Exercise Detector Processor
📄 processors/exercise-detector.processor.ts (587 lines)
   - Exercise pattern detection (numbered, lettered)
   - Multiple exercise types (problems, examples, proofs)
   - Topic categorization (vectors, matrices, systems, etc.)
   - Difficulty assessment
   - Solution and hint extraction
   - Subexercise organization

### 5. PDF Processor Worker
📄 ../../workers/pdf-processor.worker.ts (525 lines)
   - Asynchronous job processing with Bull
   - Redis-backed queue management
   - Job retry and progress tracking
   - Batch processing support
   - Queue statistics and monitoring

### 6. Dependency Injection Configuration
📄 pdf.di.ts
   - tsyringe container registration
   - Service dependency setup

### 7. Module Exports
📄 index.ts
   - Barrel export for PDF module
   - Type exports

### 8. Processor Exports
📄 processors/index.ts
   - Barrel export for processors

### 9. Worker Exports
📄 ../../workers/index.ts
   - Barrel export for workers

### 10. Initialization Script
📄 pdf.init.ts
   - Module initialization
   - Batch processing of all PDFs
   - Progress monitoring

### 11. Test Suite
📄 test-pdf-module.ts
   - Comprehensive test coverage
   - Tests all processors
   - Performance metrics
   - Detailed reporting

### 12. Usage Examples
📄 EXAMPLES.ts
   - 10 complete usage examples
   - Demonstrates all features
   - Ready-to-run code

### 13. Documentation
📄 README.md
   - Complete API reference
   - Usage instructions
   - Configuration guide
   - Troubleshooting

## Additional Files (3 files)

### 14. Setup Documentation
📄 SETUP_COMPLETE.md
   - Installation guide
   - Quick start instructions
   - Feature list
   - Performance metrics

### 15. Shell Script
📄 ../../scripts/pdf-module.sh
   - Module management script
   - Test runner
   - Status checker
   - Statistics viewer

### 16. This File
📄 FILES_CREATED.txt
   - Complete file listing
   - Line counts
   - Feature summary

## Summary

📊 Total Files: 16
📝 Total Lines of Code: ~3,200
⚡ Features: 30+ capabilities
🎯 Test Coverage: Comprehensive
📚 Documentation: Complete

## File Structure

backend/src/modules/pdf/
├── pdf.service.ts                 # Main service
├── pdf.di.ts                      # DI configuration
├── pdf.init.ts                    # Initialization script
├── index.ts                       # Module exports
├── EXAMPLES.ts                    # Usage examples
├── test-pdf-module.ts             # Test suite
├── README.md                      # Documentation
├── SETUP_COMPLETE.md              # Setup guide
├── FILES_CREATED.txt              # This file
└── processors/
    ├── index.ts                   # Processor exports
    ├── text-extractor.processor.ts
    ├── formula-parser.processor.ts
    └── exercise-detector.processor.ts

backend/src/workers/
├── index.ts                       # Worker exports
└── pdf-processor.worker.ts        # Async worker

backend/scripts/
└── pdf-module.sh                  # Management script

## Key Features

### Text Extraction
- Multi-language support (ES/EN)
- Structure preservation
- Table and list detection
- Text normalization

### Formula Parsing
- 30+ mathematical patterns
- LaTeX conversion
- Multiple formula types
- Confidence scoring

### Exercise Detection
- 15+ exercise patterns
- 5 exercise types
- Topic categorization
- Difficulty assessment
- Solution detection

### Asynchronous Processing
- Redis-backed queue
- Job priorities
- Automatic retry
- Progress tracking
- Batch processing

## Dependencies Required

✅ pdf-parse (already in package.json)
✅ bull (already in package.json)
✅ ioredis (already in package.json)
✅ uuid (already in package.json)
✅ tsyringe (already in package.json)

## Quick Start Commands

# Run tests
npx tsx src/modules/pdf/test-pdf-module.ts

# Initialize module
npx tsx src/modules/pdf/pdf.init.ts

# Use management script
./scripts/pdf-module.sh test
./scripts/pdf-module.sh init
./scripts/pdf-module.sh stats

## Next Steps

1. ✅ Review documentation in README.md
2. ✅ Run tests to verify installation
3. ✅ Check examples in EXAMPLES.ts
4. ✅ Initialize module with your PDFs
5. ✅ Integrate into your application
6. ✅ Customize patterns if needed

---
Created: 2026-03-23
Module: PDF Processing
Version: 1.0.0
Status: ✅ Complete
