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web-admin/src/utils/protocol-payment-labels.ts

@@ -43,6 +43,37 @@ export function formatPaymentDueDate(d: unknown) {
   return s
 }
 
+/** 分期应缴预警天数（与分期预警规则一致：应缴日在当天起未来 N 天内，含逾期） */
+export const PAYMENT_DUE_WARN_DAYS = 15
+
+function parsePaymentDueYmd(ymd: unknown): Date | null {
+  const raw = String(ymd || '').replace(/\D/g, '')
+  if (raw.length !== 8) return null
+  const y = Number(raw.slice(0, 4))
+  const m = Number(raw.slice(4, 6)) - 1
+  const d = Number(raw.slice(6, 8))
+  const dt = new Date(y, m, d)
+  if (dt.getFullYear() !== y || dt.getMonth() !== m || dt.getDate() !== d) return null
+  return dt
+}
+
+function startOfLocalDay(d: Date) {
+  return new Date(d.getFullYear(), d.getMonth(), d.getDate())
+}
+
+/** 应缴日是否不晚于「今天 + warnDays」（含当天与已逾期） */
+export function isPaymentDueWithinWarnWindow(
+  installmentDueDate: unknown,
+  warnDays = PAYMENT_DUE_WARN_DAYS
+) {
+  const due = parsePaymentDueYmd(installmentDueDate)
+  if (!due) return false
+  const today = startOfLocalDay(new Date())
+  const limit = new Date(today)
+  limit.setDate(limit.getDate() + warnDays)
+  return due.getTime() <= limit.getTime()
+}
+
 export function formatPaymentAmount(v: unknown) {
   if (v == null || v === '') return '-'
   const n = Number(v)