new feature: Error code 507 will return if you want to delete a loan that has not been returned

backendV2/routes/app/database/loansMgmt.database.js

@@ -234,6 +234,23 @@ export const getBorrowableItemsFromDatabase = async (
 };
 
 export const SETdeleteLoanFromDatabase = async (loanId) => {
+  const [checkIfdatesReturned] = await pool.query(
+    "SELECT take_date, returned_date FROM loans WHERE id = ? AND deleted = 0",
+    [loanId],
+  );
+
+  if (checkIfdatesReturned.length === 0) {
+    return { success: false, code: "LOAN_NOT_FOUND" };
+  }
+
+  const { take_date, returned_date } = checkIfdatesReturned[0];
+  const bothNull = take_date === null && returned_date === null;
+  const bothSet = take_date !== null && returned_date !== null;
+
+  if (!(bothNull || bothSet)) {
+    return { success: false, code: "LOAN_NOT_RETURNED" };
+  }
+
   const [result] = await pool.query(
     "UPDATE loans SET deleted = 1 WHERE id = ?;",
     [loanId],

backendV2/routes/app/loanMgmt.route.js

@@ -134,6 +134,16 @@ router.delete("/delete-loan/:id", authenticate, async (req, res) => {
   if (result.success) {
     res.status(200).json({ message: "Loan deleted successfully" });
   } else {
+    if (result.code === "LOAN_NOT_FOUND") {
+      res.status(404).json({ message: "Loan not found" });
+    }
+
+    if (result.code === "LOAN_NOT_RETURNED") {
+      res.status(507).json({
+        message: "Cannot delete loan that has not been returned",
+      });
+    }
+
     res.status(500).json({ message: "Failed to delete loan" });
   }
 });

backendV2/server.js

@@ -23,8 +23,6 @@ const app = express();
 const port = 8004;
 const naasURL = process.env.NAAS_URL;
 
-console.log(naasURL);
-
 app.use(cors());
 // Body-Parser VOR den Routen registrieren
 app.use(express.json({ limit: "10mb" }));