Implementierung Datenbank pflege wegen doppelten einträgen

routes/admin-routes.js

@@ -322,6 +322,96 @@ function registerAdminRoutes(app) {
       });
     }
   });
+
+  // Timesheet-Duplikate (mehr als ein Eintrag pro Benutzer und Datum) als Übersicht
+  app.get('/admin/api/timesheet-duplicates', requireAdmin, (req, res) => {
+    const sql = `
+      SELECT 
+        te.*,
+        dup.entry_count,
+        u.firstname,
+        u.lastname,
+        u.username
+      FROM timesheet_entries te
+      INNER JOIN (
+        SELECT user_id, date, COUNT(*) AS entry_count
+        FROM timesheet_entries
+        GROUP BY user_id, date
+        HAVING COUNT(*) > 1
+      ) dup
+        ON dup.user_id = te.user_id
+       AND dup.date = te.date
+      INNER JOIN users u
+        ON u.id = te.user_id
+      ORDER BY te.user_id, te.date, te.id
+    `;
+
+    db.all(sql, [], (err, rows) => {
+      if (err) {
+        console.error('Fehler beim Laden der Timesheet-Duplikate:', err);
+        return res.status(500).json({ error: 'Fehler beim Laden der Timesheet-Duplikate' });
+      }
+
+      const groupsMap = new Map();
+
+      (rows || []).forEach(row => {
+        const key = `${row.user_id}|${row.date}`;
+        if (!groupsMap.has(key)) {
+          const userNameParts = [];
+          if (row.firstname) userNameParts.push(row.firstname);
+          if (row.lastname) userNameParts.push(row.lastname);
+          const user_name = userNameParts.join(' ') || row.username || `User #${row.user_id}`;
+
+          groupsMap.set(key, {
+            user_id: row.user_id,
+            user_name,
+            username: row.username,
+            date: row.date,
+            entry_count: row.entry_count,
+            entries: []
+          });
+        }
+
+        const group = groupsMap.get(key);
+        group.entries.push({
+          id: row.id,
+          start_time: row.start_time,
+          end_time: row.end_time,
+          break_minutes: row.break_minutes,
+          total_hours: row.total_hours,
+          status: row.status,
+          notes: row.notes,
+          created_at: row.created_at,
+          updated_at: row.updated_at
+        });
+      });
+
+      const groups = Array.from(groupsMap.values());
+      res.json({ groups });
+    });
+  });
+
+  // Einzelnen Timesheet-Eintrag löschen (zur manuellen Bereinigung von Duplikaten)
+  app.delete('/admin/api/timesheet-entry/:id', requireAdmin, (req, res) => {
+    const entryId = parseInt(req.params.id, 10);
+
+    if (!Number.isInteger(entryId) || entryId <= 0) {
+      return res.status(400).json({ error: 'Ungültige Eintrags-ID' });
+    }
+
+    db.run('DELETE FROM timesheet_entries WHERE id = ?', [entryId], function(err) {
+      if (err) {
+        console.error('Fehler beim Löschen des Timesheet-Eintrags:', err);
+        return res.status(500).json({ error: 'Fehler beim Löschen des Timesheet-Eintrags' });
+      }
+
+      if (this.changes === 0) {
+        return res.status(404).json({ error: 'Timesheet-Eintrag nicht gefunden' });
+      }
+
+      res.json({ success: true });
+    });
+  });
 }
 
 module.exports = registerAdminRoutes;