feat(freight): shop freight templates, server-side checkout fees, company dictionary (add-freight-templates)

apps/shop-admin/composables/useMoney.ts

@@ -16,10 +16,40 @@ export function useMoney() {
     }
   }
 
-  function fmt(amountMinor: number, currency: string): string {
-    const exponent = currencies.value.find((c) => c.code === currency)?.exponent ?? 2;
-    return formatMoney(amountMinor, currency, exponent, locale.value);
+  function exponentOf(currency: string): number {
+    return currencies.value.find((c) => c.code === currency)?.exponent ?? 2;
   }
 
-  return { currencies, load, fmt };
+  function fmt(amountMinor: number, currency: string): string {
+    return formatMoney(amountMinor, currency, exponentOf(currency), locale.value);
+  }
+
+  /** Currency for money fields without an explicit currency: the table's base. */
+  const shopCurrency = computed(
+    () => currencies.value.find((c) => c.is_base)?.code ?? currencies.value[0]?.code ?? "USD",
+  );
+
+  /** Parse a major-unit decimal string into integer minor units; null when invalid. */
+  function majorToMinor(value: string, currency: string): number | null {
+    const clean = value.trim();
+    if (!/^\d+(?:\.\d+)?$/.test(clean)) return null;
+    const exponent = exponentOf(currency);
+    const [whole, fraction = ""] = clean.split(".");
+    if (fraction.length > exponent) return null;
+    const minor = Number(whole) * 10 ** exponent + Number(fraction.padEnd(exponent, "0") || 0);
+    return Number.isSafeInteger(minor) ? minor : null;
+  }
+
+  /** Render integer minor units as a major-unit string for form inputs. */
+  function minorToMajor(minor: number, currency: string): string {
+    const exponent = exponentOf(currency);
+    const sign = minor < 0 ? "-" : "";
+    const abs = Math.abs(minor);
+    const whole = Math.trunc(abs / 10 ** exponent);
+    if (exponent === 0) return `${sign}${whole}`;
+    const fraction = (abs % 10 ** exponent).toString().padStart(exponent, "0");
+    return `${sign}${whole}.${fraction}`;
+  }
+
+  return { currencies, load, fmt, shopCurrency, majorToMinor, minorToMajor };
 }