feat: expiry links

packages/lib/utils/expiry.ts

@@ -0,0 +1,50 @@
+import type { Recipient } from '@prisma/client';
+import { DateTime } from 'luxon';
+
+export const calculateRecipientExpiry = (
+  documentExpiryAmount?: number | null,
+  documentExpiryUnit?: string | null,
+  fromDate: Date = new Date(),
+): Date | null => {
+  if (!documentExpiryAmount || !documentExpiryUnit) {
+    return null;
+  }
+
+  switch (documentExpiryUnit) {
+    case 'minutes':
+      return DateTime.fromJSDate(fromDate).plus({ minutes: documentExpiryAmount }).toJSDate();
+    case 'hours':
+      return DateTime.fromJSDate(fromDate).plus({ hours: documentExpiryAmount }).toJSDate();
+    case 'days':
+      return DateTime.fromJSDate(fromDate).plus({ days: documentExpiryAmount }).toJSDate();
+    case 'weeks':
+      return DateTime.fromJSDate(fromDate).plus({ weeks: documentExpiryAmount }).toJSDate();
+    case 'months':
+      return DateTime.fromJSDate(fromDate).plus({ months: documentExpiryAmount }).toJSDate();
+    default:
+      return DateTime.fromJSDate(fromDate).plus({ days: documentExpiryAmount }).toJSDate();
+  }
+};
+
+export const isRecipientExpired = (recipient: Recipient): boolean => {
+  if (!recipient.expired) {
+    return false;
+  }
+
+  return DateTime.now() > DateTime.fromJSDate(recipient.expired);
+};
+
+export const isValidExpirySettings = (
+  expiryAmount?: number | null,
+  expiryUnit?: string | null,
+): boolean => {
+  if (!expiryAmount || !expiryUnit) {
+    return true;
+  }
+
+  return expiryAmount > 0 && ['minutes', 'hours', 'days', 'weeks', 'months'].includes(expiryUnit);
+};
+
+export const formatExpiryDate = (date: Date): string => {
+  return DateTime.fromJSDate(date).toFormat('MMM dd, yyyy HH:mm');
+};