delete uploaded file

backend/index.js

@@ -63,7 +63,9 @@ app.use("/steps", stepsDeleteRoute);
 
 // "/attachments"
 const attachmentsNewRoute = require("./routes/attachments/new")(sequelize);
+const attachmentsDeleteRoute = require("./routes/attachments/delete")(sequelize);
 app.use("/attachments", attachmentsNewRoute);
+app.use("/attachments", attachmentsDeleteRoute);
 
 // "/runs"
 const runsIndexRoute = require("./routes/runs/index")(sequelize);

backend/routes/attachments/delete.js

@@ -0,0 +1,47 @@
+const express = require("express");
+const router = express.Router();
+const path = require("path");
+const fs = require("fs");
+const defineAttachment = require("../../models/attachments");
+const { DataTypes } = require("sequelize");
+
+module.exports = function (sequelize) {
+  const Attachment = defineAttachment(sequelize, DataTypes);
+
+  router.delete("/:attachmentId", async (req, res) => {
+    const attachmentId = req.params.attachmentId;
+    const t = await sequelize.transaction();
+
+    try {
+      const attachment = await Attachment.findByPk(attachmentId);
+      if (!attachment) {
+        await t.rollback();
+        return res.status(404).send("Attachment not found");
+      }
+
+      // delete file from folder
+      const uploadDir = path.join(__dirname, "../../public");
+      const url = attachment.path;
+      const parts = url.split('/');
+      const fileNameWithFolder = parts.slice(-2).join('/');
+      const filePath = path.join(uploadDir, fileNameWithFolder);
+      fs.unlink(filePath, (err) => {
+        if (err) {
+          console.error('Error deleting file:', err);
+          t.rollback();
+          return res.status(404).send("Attachment not found");
+        }
+      });
+
+      await attachment.destroy({ transaction: t });
+      await t.commit();
+      res.status(204).send();
+    } catch (error) {
+      console.error(error);
+      await t.rollback();
+      res.status(500).send("Internal Server Error");
+    }
+  });
+
+  return router;
+};