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HenHacks 2025 - Smalltalk Mini Category Submission

Project Overview

This project is a recipe recommendation system that helps users find recipes based on available ingredients. It includes an offline mode that ensures users can still find recipes even when the AI service is unavailable.

Smalltalk Usage in the Project

Our project leverages Smalltalk for data preprocessing and recipe generation, ensuring structured and accessible recipe data across different application states. Using Pharo Smalltalk, we converted raw recipe data into a well-structured JSON format, allowing for efficient storage and retrieval. Additionally, we generated prebuilt offline recipes to maintain functionality when AI-powered services are unavailable, providing users with a fallback solution for recipe recommendations. To enhance usability, we parsed and formatted the JSON data for seamless integration into the React frontend, enabling dynamic recipe searches and efficient filtering based on user-provided ingredients.

Location of Smalltalk Files

  • backend/parse_data.st → Smalltalk script that generates recipe.json
  • public/recipe.json → JSON output from Smalltalk, used in the offline mode
  • OfflinePage.tsx (src/pages/) → React component that loads recipe.json in offline mode

How to Run the Smalltalk Script

  1. Open Pharo Smalltalk
  2. Load and run parse_data.st
  3. The script generates recipe.json in the public/ directory
  4. Run the React app to test offline mode with the generated JSON

Getting Started with Create React App

This project was bootstrapped with Create React App.

Available Scripts

In the project directory, you can run:

npm start

Runs the app in the development mode.
Open http://localhost:3000 to view it in the browser.

The page will reload if you make edits.
You will also see any lint errors in the console.

npm test

Launches the test runner in the interactive watch mode.
See the section about running tests for more information.

npm run build

Builds the app for production to the build folder.
It correctly bundles React in production mode and optimizes the build for the best performance.

The build is minified and the filenames include the hashes.
Your app is ready to be deployed!

See the section about deployment for more information.

npm run eject

Note: this is a one-way operation. Once you eject, you can’t go back!

If you aren’t satisfied with the build tool and configuration choices, you can eject at any time. This command will remove the single build dependency from your project.

Instead, it will copy all the configuration files and the transitive dependencies (webpack, Babel, ESLint, etc) right into your project so you have full control over them. All of the commands except eject will still work, but they will point to the copied scripts so you can tweak them. At this point you’re on your own.

You don’t have to ever use eject. The curated feature set is suitable for small and middle deployments, and you shouldn’t feel obligated to use this feature. However we understand that this tool wouldn’t be useful if you couldn’t customize it when you are ready for it.

Learn More

You can learn more in the Create React App documentation.

To learn React, check out the React documentation.

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