This directory contains the backend code for the KidC platform.

• index.ts - Main entry point for the HTTP trigger
• database/ - Database migrations and queries
• routes/ - API route handlers
• services/ - Business logic services

• GET /api/lessons - Get all lessons
• GET /api/lessons/:slug - Get a specific lesson by slug
• GET /api/lessons/:lessonId/exercises - Get exercises for a lesson

• GET /api/exercises/:id - Get a specific exercise
• POST /api/exercises/:id/submit - Submit a solution for an exercise

• POST /api/compile - Compile and run C code

• GET /api/users/:username/progress - Get learning path with user progress

The platform uses SQLite for data storage with the following tables:

• kidc_users_v1 - User information
• kidc_lessons_v1 - Lesson content
• kidc_exercises_v1 - Exercise definitions
• kidc_user_progress_v1 - User progress tracking
• kidc_user_solutions_v1 - User submitted solutions

The compiler service provides functionality to compile and run C code. In the current implementation, it simulates compilation and execution for demonstration purposes.

The exercise service handles validation of exercise solutions against test cases.