Recipe Sharing API

Problem/Feature Description

A cooking enthusiast community wants a Flask API for sharing recipes. Users can create recipes with ingredients and steps, browse recipes by category, and rate them.

Data model:

• Recipe: title, description, prep_time_minutes, cook_time_minutes, servings, category (appetizer/main/dessert/snack)
• Ingredient: name, quantity, unit (per recipe)
• Step: step_number, instruction (per recipe)
• Rating: score (1-5), comment (per recipe)

Endpoints needed:

• POST /api/recipes -- create a recipe (with nested ingredients and steps in the request body)
• GET /api/recipes -- list recipes with optional ?category=dessert filter
• GET /api/recipes/<id> -- get a recipe with its ingredients, steps, and average rating
• POST /api/recipes/<id>/ratings -- add a rating to a recipe
• DELETE /api/recipes/<id> -- delete a recipe and its related data

Requirements:

• Validate that recipes have at least one ingredient and one step.
• Ratings must be 1-5 integers.
• Use a proper Flask project structure that a team could maintain.
• Include a CLI command flask seed-recipes that populates sample data for development.

Output Specification

Produce Python source files in a recipe-api/ directory:

• app/__init__.py -- application factory with CLI command registration
• app/extensions.py -- extension instances
• app/errors.py -- custom exceptions and error handlers
• app/db.py -- data store
• app/routes/recipes.py -- recipes blueprint
• app/routes/ratings.py -- ratings blueprint
• tests/conftest.py -- test fixtures
• run.py -- entry point
• requirements.txt

Do not run pip install or start the server.