feat: füge neue Funktionen zur Analyse und Zählung von Lektionen hinzu, einschließlich der Generierung von Lernkontrollpunkten

backend/scripts/generate-lesson-checkpoints.cjs

@@ -0,0 +1,56 @@
+const fs = require('fs');
+const path = require('path');
+const vm = require('vm');
+
+function extractLessonArray(content, varNameCandidates) {
+  for (const varName of varNameCandidates) {
+    const re = new RegExp(varName.replace(/[-/\\^$*+?.()|[\]{}]/g, '\\$&') + "\\s*=\\s*\\[([\\s\\S]*?)\\];", 'm');
+    const m = re.exec(content);
+    if (m) return m[1];
+  }
+  return null;
+}
+
+function evalArrayText(arrayText) {
+  const wrapped = '[' + arrayText + ']';
+  const script = new vm.Script(wrapped, { filename: 'array.js' });
+  const context = vm.createContext({});
+  return script.runInContext(context);
+}
+
+function loadLessons(filePath, varCandidates) {
+  const content = fs.readFileSync(filePath, 'utf8');
+  const arrText = extractLessonArray(content, varCandidates);
+  if (!arrText) return [];
+  const arr = evalArrayText(arrText);
+  return arr;
+}
+
+function main() {
+  const repo = path.join(__dirname);
+  const file1 = path.join(repo, 'bisaya-course-plan-24-43.js');
+  const file2 = path.join(repo, 'bisaya-course-phase3-extension.js');
+
+  const lessons1 = loadLessons(file1, ['const BISAYA_LESSONS_24_43_BASE', 'BISAYA_LESSONS_24_43_BASE', 'BISAYA_LESSONS_24_43']);
+  const lessons2 = loadLessons(file2, ['export const BISAYA_PHASE3_LESSONS', 'BISAYA_PHASE3_LESSONS']);
+
+  const mapping = {};
+  for (const l of lessons1) {
+    if (l && typeof l.num === 'number') mapping[l.num] = true;
+  }
+  for (const l of lessons2) {
+    if (l && typeof l.num === 'number') mapping[l.num] = true;
+  }
+
+  // Also include any missing range 24..63
+  for (let n = 24; n <= 63; n++) mapping[n] = true;
+
+  const outDir = path.join(__dirname, '..', 'data');
+  if (!fs.existsSync(outDir)) fs.mkdirSync(outDir, { recursive: true });
+  const outFile = path.join(outDir, 'lesson-checkpoints.json');
+  fs.writeFileSync(outFile, JSON.stringify(mapping, null, 2));
+  console.log('Wrote', outFile);
+  console.log('Marked lessons:', Object.keys(mapping).length);
+}
+
+main();