Rename files

ts/util/getClassNamesFor.std.ts

@@ -0,0 +1,22 @@
+// Copyright 2021 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import classNames from 'classnames';
+
+export function getClassNamesFor(
+  ...modules: Array<string | undefined>
+): (modifier?: string) => string {
+  return modifier => {
+    if (modifier === undefined) {
+      return '';
+    }
+
+    const cx = modules
+      .flatMap(m => (m ? m.split(' ') : undefined))
+      .map(parentModule =>
+        parentModule ? `${parentModule}${modifier}` : undefined
+      );
+
+    return classNames(cx);
+  };
+}