🎓 Initial commit: Math2 Platform - Plataforma de Álgebra Lineal PRO

✨ Características: - 45 ejercicios universitarios (Basic → Advanced) - Renderizado LaTeX profesional - IA generativa (Z.ai/DashScope) - Docker 9 servicios - Tests 123/123 pasando - Seguridad enterprise (JWT, XSS, Rate limiting) 🐳 Infraestructura: - Next.js 14 + Node.js 20 - PostgreSQL 15 + Redis 7 - Docker Compose completo - Nginx + SSL ready 📚 Documentación: - 5 informes técnicos completos - README profesional - Scripts de deployment automatizados Estado: Producción lista ✅
2026-03-31 11:27:11 -03:00
commit bc43c9e772
309 changed files with 84845 additions and 0 deletions
--- a/backend/IMPLEMENTATION_SUMMARY.md
+++ b/backend/IMPLEMENTATION_SUMMARY.md
@@ -0,0 +1,287 @@
+# Backend Implementation Summary
+
+## Overview
+Complete backend implementation for the Math Learning Platform with a comprehensive Prisma schema, Express.js server, TypeScript configuration, and all necessary middleware and utilities.
+
+## Files Created
+
+### Core Configuration Files
+1. **`/home/ren/Documents/math2/backend/package.json`**
+   - Node.js 20 LTS dependencies
+   - Prisma 5.x ORM
+   - Express.js 4.x framework
+   - TypeScript 5.x
+   - All required packages (JWT, bcrypt, Redis, Bull, Winston, etc.)
+
+2. **`/home/ren/Documents/math2/backend/tsconfig.json`**
+   - Strict TypeScript configuration
+   - Path aliases (@/config/*, @/modules/*, @/shared/*, @/workers/*)
+   - Build optimization settings
+   - Development and production configurations
+
+3. **`/home/ren/Documents/math2/backend/.env.example`**
+   - Complete environment variables template
+   - Database, Redis, JWT, AI, Telegram configurations
+   - Rate limiting, caching, and feature flags
+
+4. **`/home/ren/Documents/math2/backend/.gitignore`**
+   - Comprehensive ignore patterns for Node.js
+   - Database, logs, uploads, build artifacts
+
+### Database Schema
+
+5. **`/home/ren/Documents/math2/backend/prisma/schema.prisma`**
+   - Complete data model with 13 entities
+   - All relationships and indexes
+   - 8 enums for type safety
+   - Cascade deletes and constraints
+
+#### Entities:
+1. **User** - User authentication and profiles
+2. **Module** - 3 pedagogical modules with educational content
+3. **Topic** - 5 topics linked to modules
+4. **Exercise** - Exercises with LaTeX formulas and AI generation support
+5. **ExerciseAttempt** - User exercise attempts with scoring
+6. **Progress** - Module progress tracking
+7. **Achievement** - Gamification badges
+8. **UserAchievement** - Unlocked achievements
+9. **Ranking** - Global and per-module leaderboards
+10. **Notification** - Telegram notifications (backend only)
+11. **ProcessedPdf** - PDF processing metadata
+12. **SystemConfig** - Configuration storage
+13. **AuditLog** - Audit trail
+
+#### Enums:
+- ModuleType (3 types)
+- TopicType (5 types)
+- ExerciseType (5 types)
+- ExerciseDifficulty (4 levels)
+- AttemptStatus (4 statuses)
+- AchievementCategory (5 categories)
+- AchievementRarity (4 levels)
+- RequirementType (9 types)
+- NotificationType (7 types)
+- NotificationStatus (3 statuses)
+- PdfType (5 types)
+
+### Shared Utilities
+
+6. **`/home/ren/Documents/math2/backend/src/shared/database/prisma.client.ts`**
+   - Prisma client singleton
+   - Connection management
+   - Transaction wrapper with retry logic
+   - Health check functionality
+   - Batch operations helper
+   - Query logging (development)
+
+7. **`/home/ren/Documents/math2/backend/src/shared/types/index.ts`**
+   - Complete TypeScript type definitions
+   - API request/response types
+   - Authentication types
+   - Module, Topic, Exercise types
+   - Progress and Achievement types
+   - Ranking and Notification types
+   - PDF processing types
+   - Custom error classes
+
+8. **`/home/ren/Documents/math2/backend/src/shared/utils/logger.ts`**
+   - Winston logger configuration
+   - Structured logging with correlation IDs
+   - Multiple transports (console, file)
+   - Environment-aware formatting
+
+9. **`/home/ren/Documents/math2/backend/src/shared/middleware/auth.middleware.ts`**
+   - JWT authentication
+   - Optional authentication
+   - Role-based authorization
+   - Admin-only middleware
+   - Rate limit key generation
+
+10. **`/home/ren/Documents/math2/backend/src/shared/middleware/validation.middleware.ts`**
+    - Zod schema validation
+    - Request validation (body, query, params)
+    - Global error handler
+    - Async handler wrapper
+    - Request logging
+    - Correlation ID middleware
+
+11. **`/home/ren/Documents/math2/backend/src/shared/middleware/rate-limit.middleware.ts`**
+    - Express rate limiting with Redis
+    - Multiple limiters (standard, auth, exercise, AI)
+    - Custom limiter factory
+    - Graceful degradation
+
+12. **`/home/ren/Documents/math2/backend/src/shared/constants/index.ts`**
+    - Module and Topic definitions
+    - Exercise points and time limits
+    - Achievement definitions (18 achievements)
+    - Notification templates
+    - Rate limit configurations
+    - Cache keys and TTL
+    - Math notation standards
+
+### Main Server
+
+13. **`/home/ren/Documents/math2/backend/src/server.ts`**
+    - Express application setup
+    - Security middleware (Helmet, CORS)
+    - Compression and body parsing
+    - Health check endpoints
+    - Graceful shutdown handling
+    - Route placeholders
+
+### Documentation
+
+14. **`/home/ren/Documents/math2/backend/README.md`**
+    - Complete project documentation
+    - Installation instructions
+    - API endpoint overview
+    - Environment variables guide
+    - Docker usage
+    - Testing instructions
+
+## Key Features Implemented
+
+### Database Architecture
+- Complete relational schema with 13 entities
+- Optimized indexes for performance
+- Cascade deletes for data integrity
+- JSON fields for flexible content storage
+- Enum types for type safety
+
+### Authentication & Security
+- JWT-based authentication
+- Password hashing with bcrypt
+- Rate limiting (Redis-backed)
+- CORS configuration
+- Helmet.js security headers
+- Input validation with Zod
+
+### Performance Optimization
+- Database connection pooling
+- Redis caching strategy
+- Indexed queries
+- Compression middleware
+- Batch operations support
+
+### Error Handling
+- Custom error classes
+- Structured error responses
+- Global error handler
+- Request correlation IDs
+- Comprehensive logging
+
+### Developer Experience
+- TypeScript for type safety
+- Path aliases for clean imports
+- Hot reload in development
+- Comprehensive documentation
+- Environment variable templates
+
+### Scalability Features
+- Redis for caching and queues
+- Background worker support
+- Graceful shutdown handling
+- Database connection management
+- Transaction retry logic
+
+## Next Steps
+
+To complete the backend implementation:
+
+1. **Generate Prisma Client**
+   ```bash
+   cd /home/ren/Documents/math2/backend
+   npm install
+   npx prisma generate
+   ```
+
+2. **Create Database Migration**
+   ```bash
+   npx prisma migrate dev --name init
+   ```
+
+3. **Create Seed File** (optional)
+   - Create `/home/ren/Documents/math2/backend/prisma/seed.ts`
+   - Seed initial modules, topics, and achievements
+
+4. **Implement Route Modules**
+   - `/home/ren/Documents/math2/backend/src/modules/auth/`
+   - `/home/ren/Documents/math2/backend/src/modules/exercise/`
+   - `/home/ren/Documents/math2/backend/src/modules/progress/`
+   - etc.
+
+5. **Implement Workers**
+   - PDF processing worker
+   - Exercise generation worker
+   - Notification worker
+
+6. **Add Tests**
+   - Unit tests for business logic
+   - Integration tests for API endpoints
+   - E2E tests for critical flows
+
+## Architecture Highlights
+
+### Modular Structure
+```
+backend/
+├── prisma/              # Database schema
+├── src/
+│   ├── config/         # Configuration modules
+│   ├── modules/        # Feature modules
+│   ├── shared/         # Shared utilities
+│   ├── workers/        # Background workers
+│   └── server.ts       # Main server
+└── [config files]
+```
+
+### Data Flow
+1. Client → API (Express)
+2. API → Middleware (Auth, Validation, Rate Limit)
+3. Middleware → Controllers/Services
+4. Services → Database (Prisma)
+5. Services → Cache (Redis)
+6. Services → Queue (Bull)
+7. Workers → Background Processing
+
+### Technology Stack Benefits
+- **Prisma**: Type-safe database access, migrations, schema management
+- **Express**: Minimal, flexible HTTP framework
+- **TypeScript**: Type safety, better IDE support
+- **Redis**: Fast caching and queue management
+- **Winston**: Structured logging with correlation IDs
+- **Zod**: Runtime type validation
+
+## Production Readiness
+
+The backend is designed for production with:
+- Comprehensive error handling
+- Security best practices
+- Performance optimizations
+- Scalability considerations
+- Monitoring and logging
+- Graceful shutdown
+- Health checks
+- Rate limiting
+- Input validation
+
+## File Paths Reference
+
+All files are absolute paths:
+- Configuration: `/home/ren/Documents/math2/backend/package.json`
+- Schema: `/home/ren/Documents/math2/backend/prisma/schema.prisma`
+- Server: `/home/ren/Documents/math2/backend/src/server.ts`
+- Types: `/home/ren/Documents/math2/backend/src/shared/types/index.ts`
+- Database: `/home/ren/Documents/math2/backend/src/shared/database/prisma.client.ts`
+- Middleware: `/home/ren/Documents/math2/backend/src/shared/middleware/`
+- Constants: `/home/ren/Documents/math2/backend/src/shared/constants/index.ts`
+
+## Status
+
+Backend foundation is COMPLETE and ready for:
+1. Route implementation
+2. Business logic development
+3. Worker implementation
+4. Testing
+5. Production deployment