Design Chat Application

User Registration and Authentication

• Use Case: Users should be able to create an account using their email or phone number and log in securely.

One-on-One Messaging

• Use Case: Users can send and receive text messages in real-time to/from other users.

Group Chat

• Use Case: Users can create groups and send messages to multiple users simultaneously.

Online Status Indicator

• Use Case: Users can see the online/offline status of their contacts.

Message History

• Use Case: Users can view past conversations and search through message history.

Notifications

• Use Case: Users receive notifications for new messages when they are not actively using the app.

File Sharing

• Use Case: Users can share images, videos, and documents within chats.