Rename files

ts/linkPreviews/isLinkPreviewDateValid.std.ts

@@ -0,0 +1,14 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+const ONE_DAY = 24 * 60 * 60 * 1000;
+
+export function isLinkPreviewDateValid(value: unknown): value is number {
+  const maximumLinkPreviewDate = Date.now() + ONE_DAY;
+  return (
+    typeof value === 'number' &&
+    value !== 0 &&
+    Number.isFinite(value) &&
+    value < maximumLinkPreviewDate
+  );
+}