erster Versuch mit Fahrkosten

app/api/fahrkosten/route.ts

@@ -0,0 +1,42 @@
+import { NextResponse } from 'next/server';
+import { query } from '@/lib/db';
+import { getSession } from '@/lib/session';
+
+export interface FahrkostenRow {
+  ID: number;
+  Kuerzel: string;
+  Name: string;
+  Anzahl: number;
+}
+
+const EXCLUDED = "'PrF','Beob','BEOS','TD','ToT'";
+
+export async function GET(req: Request) {
+  const session = await getSession();
+  if (!session) return NextResponse.json({ error: 'Nicht angemeldet' }, { status: 401 });
+
+  const { searchParams } = new URL(req.url);
+  const ab = searchParams.get('ab');
+  if (!ab || !/^\d{4}-\d{2}-\d{2}$/.test(ab)) {
+    return NextResponse.json({ error: 'Parameter ab (YYYY-MM-DD) fehlt' }, { status: 400 });
+  }
+
+  try {
+    const rows = await query(
+      'SELECT b.id AS ID, b.`kürzel` AS Kuerzel,' +
+      ' CONCAT(IFNULL(b.vorname, \'\'), IF(b.vorname IS NOT NULL, \' \', \'\'), b.name) AS Name,' +
+      ' COUNT(DISTINCT l.ID) AS Anzahl' +
+      ' FROM beos b' +
+      ' JOIN logbuch_beos lb ON lb.BeoID = b.id' +
+      ' JOIN logbuch l ON l.ID = lb.LogbuchID' +
+      ' WHERE l.Beginn >= ? AND l.ArtFuehrung NOT IN (' + EXCLUDED + ')' +
+      ' GROUP BY b.id, b.`kürzel`, b.name, b.vorname' +
+      ' ORDER BY b.name ASC',
+      [ab + ' 00:00:00']
+    ) as FahrkostenRow[];
+    return NextResponse.json(rows);
+  } catch (error) {
+    console.error('GET /api/fahrkosten:', error);
+    return NextResponse.json({ error: 'Datenbankfehler' }, { status: 500 });
+  }
+}