merged with main

assignment-service/server.js

@@ -4,14 +4,22 @@ const passport = require("passport");
 const session = require("express-session");
 
 const express = require("express");
+const AWS = require("aws-sdk");
 const instructorRouter = require("./routes/InstructorRouter");
 const studentRouter = require("./routes/StudentRouter");
 
+const s3 = new AWS.S3({
+  endpoint: process.env.AWS_ENDPOINT_URL_S3,
+  accessKeyId: process.env.AWS_ACCESS_KEY_ID,
+  secretAccessKey: process.env.AWS_SECRET_ACCESS_KEY,
+  region: process.env.AWS_REGION,
+  s3ForcePathStyle: true
+});
+const BUCKET = process.env.COMMON_BUCKET;
+
 const app = express();
 app.use(express.json());
 app.use(express.urlencoded({ extended: true }));
-
-// Allow all origins (not recommended for production)
 app.use(cors());
 
 // app.use(
@@ -34,10 +42,33 @@ app.use(cors());
 //         methods: ["GET", "POST"],
 //         credentials: true,
 //     })
-// )
+// );
 
 app.use("/instructor", instructorRouter);
 app.use("/student", studentRouter);
 
+app.get("/", (req, res) => {
+    res.send("OK");
+  });
+
+app.get("/notebook/:appName", async (req, res) => {
+  try {
+    const { appName } = req.params;
+    const prefix = `${appName}/notebooks/`;
+    const list = await s3.listObjectsV2({ Bucket: BUCKET, Prefix: prefix }).promise();
+    if (!list.Contents || list.Contents.length === 0) {
+      return res.status(404).json({ error: "Notebook not found" });
+    }
+    const latest = list.Contents.reduce((prev, curr) =>
+      prev.LastModified > curr.LastModified ? prev : curr
+    );
+    const data = await s3.getObject({ Bucket: BUCKET, Key: latest.Key }).promise();
+    res.send(data.Body.toString("utf-8"));
+  } catch (error) {
+    console.error("Failed to load notebook:", error);
+    res.status(500).json({ error: "Failed to load notebook" });
+  }
+});
+
 const port = process.env.NODE_PORT || 8080;
-app.listen(port, () => console.log(`Listening on port ${port}...`));
+app.listen(port, "0.0.0.0", () => console.log(`Listening on 0.0.0.0:${port}...`));