refactor progress

packages/api/src/stripe/StripeUtils.tsx

@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2026 Fluxer Contributors
+ *
+ * This file is part of Fluxer.
+ *
+ * Fluxer is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Fluxer is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with Fluxer. If not, see <https://www.gnu.org/licenses/>.
+ */
+
+export function extractId(value: string | {id: string} | null | undefined): string | null {
+	if (!value) return null;
+	if (typeof value === 'string') return value || null;
+	return value.id || null;
+}
+
+export function addMonthsClamp(date: Date, months: number): Date {
+	const d = new Date(date);
+	const originalDay = d.getDate();
+	const targetMonth = d.getMonth() + months;
+	d.setMonth(targetMonth);
+
+	if (d.getDate() < originalDay) {
+		d.setDate(0);
+	}
+	return d;
+}