feat: ability to limit the max expiration of a share

backend/src/utils/date.util.ts

@@ -0,0 +1,12 @@
+import * as moment from "moment";
+
+export function parseRelativeDateToAbsolute(relativeDate: string) {
+  if (relativeDate == "never") return moment(0).toDate();
+
+  return moment()
+    .add(
+      relativeDate.split("-")[0],
+      relativeDate.split("-")[1] as moment.unitOfTime.DurationConstructor,
+    )
+    .toDate();
+}