bisaja fixes

frontend/src/utils/numberAnswerVariants.js

@@ -48,6 +48,51 @@ const GERMAN_NUMBER_WORDS = new Map([
   ['zweitausend', '2000']
 ]);
 
+const GERMAN_NUMBER_PARTS = new Map([
+  ['null', 0],
+  ['ein', 1],
+  ['eins', 1],
+  ['eine', 1],
+  ['einen', 1],
+  ['einem', 1],
+  ['einer', 1],
+  ['zwei', 2],
+  ['drei', 3],
+  ['vier', 4],
+  ['fuenf', 5],
+  ['funf', 5],
+  ['fünf', 5],
+  ['sechs', 6],
+  ['sieben', 7],
+  ['acht', 8],
+  ['neun', 9],
+  ['zehn', 10],
+  ['elf', 11],
+  ['zwoelf', 12],
+  ['zwolf', 12],
+  ['zwölf', 12],
+  ['dreizehn', 13],
+  ['vierzehn', 14],
+  ['fuenfzehn', 15],
+  ['funfzehn', 15],
+  ['fünfzehn', 15],
+  ['sechzehn', 16],
+  ['siebzehn', 17],
+  ['achtzehn', 18],
+  ['neunzehn', 19],
+  ['zwanzig', 20],
+  ['dreissig', 30],
+  ['dreißig', 30],
+  ['vierzig', 40],
+  ['fuenfzig', 50],
+  ['funfzig', 50],
+  ['fünfzig', 50],
+  ['sechzig', 60],
+  ['siebzig', 70],
+  ['achtzig', 80],
+  ['neunzig', 90]
+]);
+
 const GERMAN_ONES = [
   ['', ''],
   ['ein', 'eins'],
@@ -88,6 +133,60 @@ function stripGermanNumberSeparators(value) {
     .replace(/[\s.-]+/g, '');
 }
 
+function parseGermanUnderHundred(compact) {
+  if (!compact) return null;
+  if (GERMAN_NUMBER_PARTS.has(compact)) {
+    return GERMAN_NUMBER_PARTS.get(compact);
+  }
+
+  const undIndex = compact.indexOf('und');
+  if (undIndex > 0) {
+    const onesPart = compact.slice(0, undIndex);
+    const tensPart = compact.slice(undIndex + 3);
+    const ones = GERMAN_NUMBER_PARTS.get(onesPart);
+    const tens = GERMAN_NUMBER_PARTS.get(tensPart);
+    if (ones >= 1 && ones <= 9 && tens >= 20 && tens % 10 === 0) {
+      return tens + ones;
+    }
+  }
+
+  return null;
+}
+
+function parseGermanNumberWord(compact) {
+  if (!compact) return null;
+  if (/^\d+$/.test(compact)) {
+    return Number(compact);
+  }
+  if (GERMAN_NUMBER_PARTS.has(compact)) {
+    return GERMAN_NUMBER_PARTS.get(compact);
+  }
+
+  const tausendIndex = compact.indexOf('tausend');
+  if (tausendIndex !== -1) {
+    const thousandsPart = compact.slice(0, tausendIndex);
+    const remainderPart = compact.slice(tausendIndex + 'tausend'.length);
+    const thousands = thousandsPart ? parseGermanNumberWord(thousandsPart) : 1;
+    const remainder = remainderPart ? parseGermanNumberWord(remainderPart) : 0;
+    if (thousands !== null && remainder !== null) {
+      return thousands * 1000 + remainder;
+    }
+  }
+
+  const hundertIndex = compact.indexOf('hundert');
+  if (hundertIndex !== -1) {
+    const hundredsPart = compact.slice(0, hundertIndex);
+    const remainderPart = compact.slice(hundertIndex + 'hundert'.length);
+    const hundreds = hundredsPart ? parseGermanNumberWord(hundredsPart) : 1;
+    const remainder = remainderPart ? parseGermanUnderHundred(remainderPart) : 0;
+    if (hundreds !== null && remainder !== null) {
+      return hundreds * 100 + remainder;
+    }
+  }
+
+  return parseGermanUnderHundred(compact);
+}
+
 export function canonicalizeNumberAnswer(value) {
   const raw = String(value || '').trim().toLowerCase();
   if (!raw) return '';
@@ -97,6 +196,11 @@ export function canonicalizeNumberAnswer(value) {
     return String(Number(compact));
   }
 
+  const parsed = parseGermanNumberWord(compact);
+  if (parsed !== null) {
+    return String(parsed);
+  }
+
   return GERMAN_NUMBER_WORDS.get(compact) || '';
 }