From 74b7297c97ea6d3f3d85f35d1950b289aa58af34 Mon Sep 17 00:00:00 2001
From: "Torsten Schulz (local)" <tsschulz@gmx.net>
Date: Thu, 21 May 2026 13:47:42 +0200
Subject: [PATCH] =?UTF-8?q?feat:=20F=C3=BCge=20Skript=20hinzu,=20um=20prob?=
 =?UTF-8?q?lematische=20Multiple-Choice-=C3=9Cbungen=20zu=20identifizieren?=
 =?UTF-8?q?=20und=20zu=20l=C3=B6schen?=
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---
 backend/scripts/repair-remove-sentence-mc.js | 74 ++++++++++++++++++++
 1 file changed, 74 insertions(+)
 create mode 100644 backend/scripts/repair-remove-sentence-mc.js

diff --git a/backend/scripts/repair-remove-sentence-mc.js b/backend/scripts/repair-remove-sentence-mc.js
new file mode 100644
index 0000000..8828186
--- /dev/null
+++ b/backend/scripts/repair-remove-sentence-mc.js
@@ -0,0 +1,74 @@
+#!/usr/bin/env node
+/**
+ * Findet Multiple-Choice-Übungen, bei denen die Frage ein einzelnes Wort ist
+ * aber die richtige Antwort ein kompletter Satz (mehrere Wörter) ist.
+ *
+ * Default: Dry-run und listet die gefundenen Übungen auf.
+ * Use --apply to actually delete them from the DB.
+ */
+
+import { sequelize } from '../utils/sequelize.js';
+import VocabGrammarExercise from '../models/community/vocab_grammar_exercise.js';
+
+const args = process.argv.slice(2);
+const apply = args.includes('--apply');
+
+async function run() {
+  try {
+    await sequelize.authenticate();
+    console.log('✅ DB verbunden');
+
+    const list = await VocabGrammarExercise.findAll({
+      where: { exerciseTypeId: 2 },
+      order: [['lesson_id', 'ASC'], ['exercise_number', 'ASC']]
+    });
+
+    const candidates = [];
+    for (const ex of list) {
+      const q = ex.questionData || {};
+      const a = ex.answerData || {};
+      const questionText = String(q.question || q.text || '').trim();
+      const correct = String(a.correctAnswer || a.correct || a.correctAnswerText || '').trim();
+      if (!questionText || !correct) continue;
+
+      const questionWords = questionText.split(/\s+/).filter(Boolean).length;
+      const correctWords = correct.split(/\s+/).filter(Boolean).length;
+
+      // Heuristik: Frage ist Einzelwort, Antwort ist Satz (>1 Wort)
+      if (questionWords === 1 && correctWords > 1) {
+        candidates.push({ id: ex.id, lessonId: ex.lessonId, exerciseNumber: ex.exerciseNumber, title: ex.title, questionText, correct });
+      }
+    }
+
+    if (!candidates.length) {
+      console.log('Keine problematischen MC-Übungen gefunden.');
+      return;
+    }
+
+    console.log(`Gefundene problematische Übungen: ${candidates.length}`);
+    candidates.forEach((c, i) => {
+      console.log(`${i + 1}. ID:${c.id} lesson:${c.lessonId} #${c.exerciseNumber} title:"${c.title}" question:"${c.questionText}" -> correct:"${c.correct}"`);
+    });
+
+    if (!apply) {
+      console.log('\nDry-run beendet. Verwende --apply, um die gefundenen Übungen zu löschen.');
+      return;
+    }
+
+    console.log('\n--apply gesetzt: Lösche die gefundenen Übungen...');
+    for (const c of candidates) {
+      const ex = await VocabGrammarExercise.findByPk(c.id);
+      if (ex) {
+        await ex.destroy();
+        console.log(`Gelöscht: ID ${c.id}`);
+      }
+    }
+    console.log('Fertig.');
+  } catch (err) {
+    console.error('Fehler:', err);
+  } finally {
+    await sequelize.close();
+  }
+}
+
+run();