Individual and group chats
Socket rooms keyed per conversation, so a message reaches exactly the people in that thread and nobody else.
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Sangatihit
Node.jsSocket.IOMongoDBExpressReact
A real-time messaging platform with one-to-one and group chats, presence, typing signals, and media sharing.
About the project
Sangatihit is a real-time social messaging platform built on Node.js and Socket.IO, with MongoDB behind it. It covers the communication basics people actually expect: individual threads, group rooms, who is online right now, and who is typing.
The socket layer is the interesting part. Rooms are keyed per conversation, presence is tracked per connection rather than per user so multiple tabs behave correctly, and message delivery is acknowledged end to end rather than assumed.
Media sharing runs through a separate upload path so large files never block the socket, and chat history is paginated from the server so opening a long-running thread stays instant.
Key features
Presence and typing signals
Online status tracked per connection rather than per user, so several open tabs never produce a false offline.
Media sharing
Images and files upload over a separate HTTP path so a large attachment never blocks live message traffic.
Paginated history
Server-side cursor pagination keeps long-running threads fast to open on any device.
Gallery