Rename files

ts/util/getUserAgent.node.ts

@@ -0,0 +1,29 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import os from 'node:os';
+
+import { getOwn } from './getOwn.std.js';
+
+const PLATFORM_STRINGS: { [platform: string]: string } = {
+  win32: 'Windows',
+  darwin: 'macOS',
+  linux: 'Linux',
+};
+
+export function getUserAgent(
+  appVersion: string,
+  release = os.release()
+): string {
+  // `process.platform` could be missing if someone figures out how to compile Signal on
+  //   an unsupported OS and forgets to update this file. We'd rather send nothing than
+  //   crash.
+  const platformString = getOwn(PLATFORM_STRINGS, process.platform);
+
+  let result = `Signal-Desktop/${appVersion}`;
+  if (platformString) {
+    result += ` ${platformString} ${release}`;
+  }
+
+  return result;
+}