This project is a secure chat application built using JavaScript, React, HTML, CSS, and Node.js. The application includes real-time messaging, user authentication, and a content moderation system that ensures the safety of messages and images using AI-based checks. This project was developed as part of the QueenB X AppsFlyer - BeSafe Hackathon 2025.

• Socket.io Integration: Real-time communication between users is facilitated through socket.io, ensuring instant message delivery and updates.
• Conversation Management: Users can maintain multiple conversations, and messages are sorted based on the latest interaction.

• AI-Based Safety Checks: Messages and images are checked for inappropriate content using OpenAI's API and Google Cloud Vision.
• Text Content Safety: The checkContentSafety function analyzes text messages for offensive or harmful content. Messages deemed unsafe are flagged.
• Image Content Safety: Uploaded images are analyzed for nudity or inappropriate content using Google Cloud Vision and OpenAI's moderation tools. Images related to swimsuits or beach scenes are also flagged.
• Fallback Mechanism: If a user chooses to ignore the content warning, the message is sent to a trusted adult's email address, provided during the sign-up process.

• Multer for File Handling: The application uses multer for handling file uploads, storing them securely in a designated directory.

• Nodemailer for Email Alerts: If a user ignores a content warning, an email notification is sent to a trusted adult with details of the flagged content.

• JWT Authentication: Secure user authentication using JSON Web Tokens (JWT) for session management.
• Registration and Login: Users can register and log in with secure password hashing using bcryptjs.

• Node.js
  • Version 20.x or higher required (latest LTS recommended)
• npm
  • Version 10.x or higher required (get the latest by running npm install -g npm@latest --no-optional)

To get started with this project, you need to clone the repository to your local machine:

   git clone (https://github.com/RomiPolaczek/BeSafeHackathon2025.git)

1. Navigate to the server directory:

   cd server

2. Install server dependencies:

   npm install

1. Navigate to the client directory:

   cd ../client

2. Install client dependencies:

   npm install

• Create a .env file in the root directory.
• Add the following variables:

  OPENAI_API_KEY=your_openai_api_key
  GOOGLE_APPLICATION_CREDENTIALS=path_to_your_google_credentials.json
  

• Register or log in to access the chat application.
• Start a conversation with any registered user.
• Upload images or send text messages, which will be automatically checked for safety.

• Frontend: React, HTML, CSS
• Backend: Node.js, Express, Socket.io
• Database: Not yet implemented (planned for future versions)
• File Handling: Multer
• AI Content Moderation: OpenAI API, Google Cloud Vision
• Email Notifications: Nodemailer