• Ram Prakash Arivu Chelvan
• Himanshu Budhiah (github.com/budhiahimanshu96)
• Shashwat Sanghavi (github.com/srsanghavi)
• John Goodacre

• System Demo: https://youtu.be/0ip6OYNTJ4Y
• System Setup: https://youtu.be/MmCKiArkris
• Final Presentation: https://youtu.be/BppZbMyqy-w

We've built a ChatServer that can communicate and coordinate message communication with different clients.

• The ChatServer code can be found in Development/ChatServer
• The Client code can be found in Development/UI

The ChatServer was built over the Prattle base code and fully written in Java.

• Websockets are used to communicate with Clients
• Uses an API Layer to parse messages and trigger appropriate action
• Supports Users, Groups, Conversations and Messages
• Users are authenticated before application access
• Groups contain conversations and can be password protected
• Threads are essentially a group of messages that exist in a conversation. They are meant to provide context to a running conversation between users
• Messages can be broadcast to other individual users in the platform
• MySQL database and the Server hosted on EC2 Instances on AWS

The Client was built using React and it connects to the Server using websocket A User would be able to:

• Create a new account / Sign in to an existing account
• Create new groups
• Send messages to other users
• Send messages in Groups
• Broadcast messages to other users
• Find other users/groups in the service, if they can be found
• Mark oneself as a Private user
• Delete a Group
• Retrieve old messages when online
• NEW: Messages are automatically translated to a language of your choice.
• NEW: Profile Pictures - Users can update their display picture
• NEW: GIFs and Emojis - Users can now send Emojis and GIFs
• NEW: Multimedia messages: Users can send and receive images and videos and view them in the client.
• NEW: Online status: Users can now see if other users are online.

• Sprint 1 - High level design, generation of ERD and UML diagrams, user stories and feature choices, working tests for the base code
• Sprint 2 - DB creation and server setup, backend work to support the planned features, basic client communication to test user-user messaging
• Sprint 3 - Server setup on AWS, Client development in React and interfacing the client with the server and lending backend support in this process
• Sprint 4 - Stabilized Server and Client code, resolved concurrency issues, added features like Translation, Multimedia support.

• Singleton
• Factory Method
• Dependency Injection