Tracker App Overview

This is a Tracker App built using the MERN stack (MongoDB, Express.js, React.js, Node.js) and Apollo GraphQL. The app allows users to track their expenses and investments, providing real-time insights through interactive charts powered by Chart.js.

🌟 Tech Stack:

• MongoDB: A NoSQL database used to store user data, including expense and investment details.
• Express.js: A lightweight web framework for building the backend server.
• React.js: A front-end library for building interactive and dynamic user interfaces.
• Node.js: A JavaScript runtime for the backend logic.
• Apollo GraphQL: A query language for the API that efficiently handles data fetching, mutations, and managing real-time updates.

📝 GraphQL Schema and Resolvers:

• Type Definitions: Define the structure of data, including types for expenses, investments, and user information.
• Resolvers: Implement the logic to fetch, update, or delete data from MongoDB. They handle queries and mutations in GraphQL to interact with the database.

🔄 Mutations:

• Mutations allow users to add, update, or delete their expense and investment data.
• Establish graph relations between users and their tracked data, ensuring data consistency and easy management.

🎃 Authentication with Passport.js:

• Passport.js is used to manage user authentication via sessions.
• The MongoDB session store ensures secure persistence of user sessions, allowing users to remain logged in across sessions.

🚀 Global State Management with Apollo Client:

• Apollo Client is used for managing the global state and communication between the front-end React app and the GraphQL API.
• It provides caching and optimistic UI to ensure the application remains fast and responsive while interacting with the backend.

🐞 Error Handling:

• Server-side error handling is done using Apollo Server to return specific error messages in GraphQL responses.
• Client-side error handling in React ensures that any issues with data fetching or mutations are communicated to the user.

📊 Chart.js Integration:

• Chart.js is used to visualize live data such as expenses and investments in the form of interactive charts.
• When a user adds or updates their data (expenses/investments), the charts automatically update on the dashboard to reflect the latest information.

💾 MongoDB for Data Storage:

• All user data, including expense and investment records, are securely stored in MongoDB.
• The MongoDB schema is defined in the GraphQL API to ensure proper data validation and structure.

🔄 Real-Time Data Updates:

• When users input new data or make changes to existing records, the dashboard automatically updates in real-time using Apollo Client and GraphQL subscriptions, keeping the data and charts in sync.

Features:

• User Authentication: Secure login and signup using Passport.js.
• Expense and Investment Tracker: Users can add, update, and view their expenses and investments in real-time.
• Interactive Dashboard: Displays live data in Chart.js graphs to give users insights into their financial habits.
• Real-Time Data Updates: The dashboard updates live as users add or modify their data, providing an up-to-date view of their finances.
• MongoDB Storage: All data is stored securely in MongoDB, ensuring scalability and easy management of large datasets.

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This Tracker App combines powerful technologies like GraphQL, MongoDB, and Chart.js to provide users with a comprehensive financial tracking experience. Users can easily track their expenses and investments, view real-time data visualizations, and manage their financial data securely through an intuitive and interactive platform.