Implement batch transmission of unanswered questions and automated session cleanup

server/index.js

@@ -280,7 +280,8 @@ app.get('/api/wettkampf-progress/:name/:setId', async (req, res) => {
                 const richtig = a['Richtig'];
                 return punkte === 0 && (richtig === false || richtig === 'false' || !richtig);
             });
-            if (allUnscored && answers.length > 0) {
+            const isFullLength = set.wettkampfCount && answers.length >= set.wettkampfCount;
+            if (allUnscored && answers.length > 0 && !isFullLength) {
                 const latest = answers.reduce((max, a) => {
                     const ts = a['Zeitstempel'] || '';
                     return ts > max ? ts : max;
@@ -324,6 +325,47 @@ app.post('/api/results', async (req, res) => {
     }
 });
 
+app.post('/api/results/abandon', async (req, res) => {
+    try {
+        const config = readConfig();
+        if (!config.answersTableId) return res.status(400).json({ error: 'Nicht konfiguriert' });
+        
+        const { sessionId, setId, nutzername, expectedCount } = req.body;
+        if (!sessionId || !setId || !nutzername) return res.status(400).json({ error: 'Fehlende Parameter' });
+
+        const set = config.sets.find((s) => s.id === setId);
+        if (!set) return res.status(404).json({ error: 'Set nicht gefunden' });
+
+        const allAnswers = await listRows(config.answersTableId, { Session_ID: sessionId, Nutzername: nutzername });
+        const answeredIds = new Set(allAnswers.map(a => Number(a['Frage_ID'])));
+        const needed = expectedCount - allAnswers.length;
+
+        if (needed > 0) {
+            const questions = await listRows(set.tableId);
+            const unpicked = questions.filter(q => !answeredIds.has(q.id));
+            const shuffled = unpicked.sort(() => Math.random() - 0.5);
+            const selected = shuffled.slice(0, needed);
+
+            const batched = selected.map(q => ({
+                Nutzername: nutzername,
+                Frage_ID: q.id,
+                Fragenset: set.name,
+                Antwort: '',
+                Richtig: false,
+                Punkte: 0,
+                Session_ID: sessionId,
+                Modus: 'Wettkampf',
+                Zeitstempel: new Date().toISOString(),
+            }));
+            await batchCreateRows(config.answersTableId, batched);
+        }
+        res.json({ success: true });
+    } catch(e) {
+        console.error('[api] Abandon error:', e.message);
+        res.status(500).json({ error: e.message });
+    }
+});
+
 app.get('/api/results/:name', async (req, res) => {
     try {
         const config = readConfig();