This project is a full-stack Twitter clone built with modern JavaScript technologies. The application offers core functionalities similar to twitter, allowing users to:

• Create, and view posts (tweets)
• Follow & unfollow other users
• View feeds from only users that you follow
• Like and reply on posts
• Retweet posts from other users
• Search for users and posts
• Experience real-time updates and chatting with Socket.IO

• Frontend: HTML, CSS, Boostrap, JQuery, JavaScript, Pug
• Backend: Node.js, Express
• Database: MongoDB
• Real-time communication: Socket.IO

• User Authentication: Secure login and registration system.
• Feed: View posts from followed users.
• Notifications: View notifications from other users instantly.
• Messaging: Chatting with other users instantly.
• Profile Image and Banner Image upload with crop functionality.
• Responsive Design: Optimized for various screen sizes.

• The server is responsible for handling user requests, managing user authentication, interacting with the database, and facilitating real-time communication using Socket.IO.
• Express.js provides routing for API endpoints to handle user actions like registration, login, posting tweets, following users, etc.
• Mongoose ODM (Object Data Modeling) simplifies interaction with the MongoDB database.

MongoDB stores

• User Data: first name, last name, username, email, password, profile picture, liked posts, retweeted posts, followed users, followers
• Tweet/Post Data: content, likes, retweeted by, posted by, if it is a reply
• Notifications Data: user to, user from, notification type(post like/reply/retweet/follow)
• Chats Data: users, chat name, latest message, created time, last updated time, if it is a group chat
• Messages Data: content, sender, chat id, read by

• The frontend will be built using HTML, CSS, and Pug templates.
• Pug templates will dynamically generate HTML pages based on user data and fetched content from the backend.
• Socket.IO will be integrated on the client-side to enable real-time updates on messages and notifications

• Users will register with a username and password.
• Login will involve verifying username and password against the database.
• Secure password hashing will be implemented for user credentials using bcrpyt npm package

• Users will have a profile page displaying a profile picture, a banner image, the number of followers, the number of users being followed, as well as all posts and replies by the user.

• Users can create tweets with text content.
• Tweets will be stored in the database with timestamps and author information.
• The frontend will display a timeline of tweets from followed users and the user themselves.

• Users can follow other users.
• Following relationships will be stored in the database.
• Number of followers and followed users will be displayed on a user's profile
• The home page feed will display tweets from followed users.

• Users can like and retweet existing tweets.
• Likes and retweets will be stored with user and tweet references in the database.
• The frontend will display like and retweet counts for each tweet.

• Users will recieve notifications from their followers for post likes, retweets, and replies in real-time.
• Users will receive notifications when someone new follows them in real-time.

• Users can create chats with other users.
• Users will receive messages in real-time.

• The application can be horizontally scaled by adding more Node.js servers behind a load balancer.
• MongoDB can be scaled by adding replica sets or sharding.

• Login and sign up using third party systems such as google, facebook, etc
• Search Optimization
• Security
• Caching