Added File uploads and fetching of said files

src/cdn.js

@@ -0,0 +1,91 @@
+import { rmSync } from 'fs';
+import { copyFile, mkdir } from 'fs/promises';
+import { Collection, Db, ObjectId } from 'mongodb';
+import multer from 'multer';
+
+const dataPath = process.env.JEOPARDY_CDN_DATA_PATH;
+const upload = multer({ dest: dataPath });
+
+/**
+ * @type {Collection}
+ */
+let ressources;
+
+/**
+ *
+ * @param {*} app
+ * @param {Db} db
+ */
+export function initCdn(app, db) {
+    ressources = db.collection('ressources');
+    app.post('/upload', upload.single('file'), uploadFile);
+    app.get('/cdn/:userid/:resid', fetchFile);
+}
+
+/**
+ *
+ * @param {import('express').Request} req
+ * @param {import('express').Response} res
+ * @param {import('express').NextFunction} next
+ */
+function uploadFile(req, res, next) {
+    console.log(req.file, req.body);
+
+    /**
+     * @type {string | undefined}
+     */
+    const path = req.body.path;
+
+    if (path !== undefined && path.startsWith('/') && !path.includes('.')) {
+        let destinationPath = `${dataPath}/${req.user._id}${req.body.path}`;
+        mkdir(destinationPath, {
+            recursive: true,
+        })
+            .then(() => {
+                return copyFile(
+                    req.file.path,
+                    `${destinationPath}/${req.file.filename}`,
+                );
+            })
+            .then(async () => {
+                rmSync(req.file.path);
+
+                await ressources.insertOne({
+                    fullpath: destinationPath,
+                    path: path,
+                    user: req.user._id,
+                    mimetype: req.file.mimetype,
+                    name: req.file.originalname,
+                    filename: req.file.filename,
+                });
+
+                res.sendStatus(200);
+            })
+            .catch((err) => {
+                console.error(err);
+                rmSync(req.file.path);
+                res.sendStatus(500);
+            });
+    } else {
+        rmSync(req.file.path);
+        res.sendStatus(400);
+    }
+}
+
+/**
+ *
+ * @param {import('express').Request} req
+ * @param {import('express').Response} res
+ */
+async function fetchFile(req, res) {
+    let ressource = await ressources.findOne({
+        user: new ObjectId(req.params.userid),
+        filename: req.params.resid,
+    });
+
+    if (ressource) {
+        res.sendFile(ressource.fullpath + ressource.filename);
+    } else {
+        res.sendStatus(404);
+    }
+}