Sending Message API Backend

IT18021080/Telemedicine-Chat-App/backend/controllers/messageControllers.js

+const asyncHandler = require("express-async-handler");
+const Chat = require("../models/chatModel");
+const Message = require("../models/messageModel");
+const User = require("../models/userModel");
+
+
+const sendMessage = asyncHandler(async (req, res) => {
+    const { content, chatId } = req.body;
+
+    if (!content || !chatId) {
+        console.log("Invalid data passed into request");
+        return res.sendStatus(400);
+    }
+
+    var newMessage = {
+        //get from messagers modal
+        sender: req.user._id,
+        content: content,
+        chat: chatId,
+        
+    };
+
+    try {
+        var message = await Message.create(newMessage);
+
+        message = await message.populate("sender", "name pic");
+        message = await message.populate("chat");
+        message = await User.populate(message, {
+            path: "chat.users",
+            select: "name pic email",
+            
+        });
+
+        await Chat.findByIdAndUpdate(req.body.chatId, {
+            latestMessage: message,
+            
+        });
+
+        res.json(message);
+
+    } catch (error) {
+        res.status(400);
+        throw new Error(error.message);
+
+    }
+});
+
+module.exports = { sendMessage };
\ No newline at end of file

IT18021080/Telemedicine-Chat-App/backend/routes/messageRoutes.js

 const express = require("express");
+const { sendMessage } = require("../controllers/messageControllers");
 const { protect } = require("../middleware/authMiddleware");
 
 const router = express.Router();
 
-//router.route("/").post(protect, sendMessage);
+router.route("/").post(protect, sendMessage);
 //router.route("/:chatId").get(protect, allMessages);
 
 module.exports = router;