Hello Dev Community! 👋

It is officially Day 170 of my full-stack engineering track! Today, I designed and implemented the backend message retrieval and chat history processing endpoints (getUserforSidebar & getMessages) for QuickChat using Node.js, Express, and MongoDB! ⚙️💬

Here is how I structured the database queries for chat retrieval and read receipts.

As captured in my implementation snapshots (messageController.js):

1. Dynamic User Discovery & Parallel Unseen Counting