add helper functions for tanstack form and cent conversions

resources/js/packages/ui/src/utils/money.ts

@@ -43,6 +43,13 @@ export function formatCents(
     return formatMoney(amount / 100, currency, format, currencySymbol, numberFormat);
 }
 
+/*
+ * Converts a major-unit amount (e.g. 19.99) to integer hundredths (i.e. cents)
+ */
+export function toCents(value: number | undefined | null): number {
+    return Math.round((value || 0) * 100);
+}
+
 export function getOrganizationCurrencySymbol(currency: string) {
     return (0)
         .toLocaleString('de-DE', {

resources/js/utils/apiValidation.ts

@@ -23,6 +23,21 @@ export function getApiValidationFieldErrors(error: unknown): Record<string, stri
     return fieldErrors;
 }
 
+/*
+ * Like getApiValidationFieldErrors, but with Laravel's dot-notation array
+ * indices (entries.0.unit_price) converted to the bracket notation of
+ * TanStack Form field names (entries[0].unit_price), so that the errors
+ * attach to the mounted fields.
+ */
+export function getApiValidationFormFieldErrors(error: unknown): Record<string, string> {
+    return Object.fromEntries(
+        Object.entries(getApiValidationFieldErrors(error)).map(([field, message]) => [
+            field.replace(/\.(\d+)(?=\.|$)/g, '[$1]'),
+            message,
+        ])
+    );
+}
+
 export function getApiValidationMessage(error: unknown, fallback: string): string {
     if (!isApiValidationError(error)) {
         return fallback;