u

src/utils/apiShape.js

@@ -0,0 +1,20 @@
+export function requireObject(value, label) {
+  if (value == null || typeof value !== 'object' || Array.isArray(value)) {
+    throw new Error(`${label}: Objekt erwartet`);
+  }
+  return value;
+}
+
+export function requireArray(value, label) {
+  if (!Array.isArray(value)) {
+    throw new Error(`${label}: Array erwartet`);
+  }
+  return value;
+}
+
+export function requireDefined(value, label) {
+  if (value == null) {
+    throw new Error(`${label}: fehlt`);
+  }
+  return value;
+}

src/utils/companyForm.js

@@ -1,5 +1,6 @@
 export const ISO639_OPTIONS = ['de', 'en'];
 
+/** Default für leeres Anlege-Formular (Browser-Sprache), nicht für API-Parsing. */
 export function defaultIso639() {
   return navigator.language?.toLowerCase().startsWith('de') ? 'de' : 'en';
 }
@@ -10,21 +11,14 @@ export function parseTaxRate(value) {
   return Number.isFinite(parsed) && parsed >= 0 ? parsed : null;
 }
 
-/** Until backend returns iso639 on company objects. */
-export function companyLanguageToIso639(company) {
-  if (company?.iso639) return company.iso639;
-  if (company?.languageId === 2) return 'en';
-  return 'de';
-}
-
 export function normalizeCompany(raw, overrides = {}) {
   if (!raw) return null;
   return {
     id: raw.id,
-    name: overrides.name ?? raw.name ?? '',
-    iso639: overrides.iso639 ?? companyLanguageToIso639(raw),
-    taxrate: overrides.taxrate ?? raw.taxrate ?? null,
-    reducedtaxrate: overrides.reducedtaxrate ?? raw.reducedtaxrate ?? null,
-    rootCategoryId: overrides.rootCategoryId ?? raw.rootCategoryId ?? null,
+    name: overrides.name !== undefined ? overrides.name : raw.name,
+    iso639: overrides.iso639 !== undefined ? overrides.iso639 : raw.iso639,
+    taxrate: overrides.taxrate !== undefined ? overrides.taxrate : raw.taxrate,
+    reducedtaxrate: overrides.reducedtaxrate !== undefined ? overrides.reducedtaxrate : raw.reducedtaxrate,
+    rootCategoryId: overrides.rootCategoryId !== undefined ? overrides.rootCategoryId : raw.rootCategoryId,
   };
 }