Feature/module management endpoints

[LaGodxy]

Module Management Endpoints Implementation

Summary

Implements comprehensive module management endpoints for the learn-to-earn platform, enabling users to browse, start, track progress, and complete learning modules with reward eligibility.

Related Issue

Closes #6

🚀 Features Implemented

Core Endpoints

• GET /api/v1/modules - List modules with pagination, filtering, and search
• GET /api/v1/modules/:id - Get detailed module information with user progress
• POST /api/v1/modules/:id/start - Start tracking module progress
• POST /api/v1/modules/:id/complete - Complete module with quiz validation

Advanced Features

• Pagination Support - Configurable page/limit parameters with metadata
• Category Filtering - Filter by blockchain, finance, security, etc.
• Difficulty Filtering - Filter by beginner, intermediate, advanced, expert
• Search Functionality - Search across title and description
• Progress Tracking - Database-backed progress persistence
• Reward System - Automatic reward eligibility calculation (70% threshold)
• User Context - Optional authentication with progress inclusion

📋 Acceptance Criteria Met

✅ Module list supports filtering and pagination

• Pagination with configurable page/limit
• Category and difficulty filters via query parameters
• Search across title and description

✅ Module details return full content for enrolled users

• Complete module information
• User progress included when authenticated
• Completion statistics

✅ Completion endpoint validates answers and calculates score

• Quiz answer validation using Zod schemas
• Score calculation based on correct answers
• Proper error handling for invalid requests

✅ Progress is tracked in database

• Completion records in Prisma database
• Start/completion timestamps
• Score and status tracking

✅ Reward eligibility is calculated correctly

• 70% score threshold for rewards
• Automatic transaction creation for eligible users
• Pending reward transaction status

🧪 Testing

Comprehensive Test Suite

• Unit Tests - Full endpoint coverage with edge cases
• Integration Tests - Database operations and authentication
• Error Scenarios - Validation, authentication, and business logic
• Mock Data - Proper test data setup and cleanup

Test Coverage

• Module listing with all filter combinations
• Authentication flows (required vs optional)
• Progress tracking lifecycle
• Reward calculation logic
• Error handling and validation

🔧 Technical Implementation

Architecture

• Controller Pattern - Clean separation of concerns
• Validation - Zod schemas for request/response validation
• Database - Prisma ORM with proper relations
• Authentication - JWT-based with optional user context
• Error Handling - Consistent error responses

Database Schema Utilization

• Module table for learning content
• Completion table for progress tracking
• Transaction table for reward management
• Proper foreign key relationships

API Design

• RESTful endpoints following semantic conventions
• Consistent response formats
• Proper HTTP status codes
• Query parameter validation

📊 Files Changed

New Files

• src/controllers/module.controller.ts - Main controller logic
• src/routes/v1/modules.routes.ts - Route definitions
• tests/modules.test.ts - Comprehensive test suite

Modified Files

• src/routes/index.ts - Added module routes to main router

🔄 Breaking Changes

None. This is a new feature addition with no impact on existing functionality.

🚦 Deployment Notes

Environment Variables

• DATABASE_URL - PostgreSQL connection required
• JWT_SECRET - For authentication middleware

Database Requirements

• Prisma migrations should be applied
• Test database setup for CI/CD pipeline

Dependencies

• All dependencies are existing in package.json
• No new package additions required

📈 Performance Considerations

• Database Queries - Optimized with proper indexing
• Pagination - Efficient limit/offset implementation
• Response Size - Minimal data transfer with selective includes
• Caching Ready - Structure supports future caching implementation

🔐 Security

• Input Validation - Zod schema validation for all inputs
• Authentication - JWT verification for protected endpoints
• SQL Injection - Prisma ORM provides protection
• Rate Limiting - Inherits from existing middleware

📝 Documentation

API endpoints include:

• Request/response examples
• Parameter descriptions
• Error scenarios
• Authentication requirements

✅ Validation

• All endpoints implemented per requirements
• Comprehensive test coverage
• TypeScript errors resolved
• ESLint checks passing
• Code follows project conventions
• Database relations properly utilized

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Ready for review! 🎉