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src/api/routes/company.js

@@ -469,6 +469,8 @@ export function register(app, basePath = '') {
      */
     // #region POST /company/import
 
+    const activeImportsByCompany = new Set();
+
     app.post(
         `${basePath}/company/import`,
         uploadCompanyImportFile,
@@ -480,6 +482,12 @@ export function register(app, basePath = '') {
                 return res.status(error.statusCode || 400).json({ error: error.message });
             }
 
+            if (activeImportsByCompany.has(companyId)) {
+                return res.status(409).json({ error: 'Import already in progress for this company' });
+            }
+            activeImportsByCompany.add(companyId);
+
+            try {
                 const importDir = path.resolve(process.cwd(), 'data/import', String(companyId));
 
             // If a file was uploaded, unpack and preserve it
@@ -631,8 +639,11 @@ export function register(app, basePath = '') {
                     res.status(500).json({ error: err.message || 'Import fehlgeschlagen' });
                 }
             }
+        } finally {
+            activeImportsByCompany.delete(companyId);
         }
-    );
+    }
+);
 
     // #endregion