Use native Chrome for Reddit login handoff

src/services/native-login-handoff.ts

@@ -0,0 +1,28 @@
+export interface NativeLoginHandoff {
+  request(): void;
+}
+
+export interface ProcessNativeLoginHandoffOptions {
+  exitCode?: number;
+  delayMs?: number;
+  exit?: (code: number) => void;
+}
+
+export class ProcessNativeLoginHandoff implements NativeLoginHandoff {
+  private requested = false;
+  private readonly exitCode: number;
+  private readonly delayMs: number;
+  private readonly exit: (code: number) => void;
+
+  constructor(options: ProcessNativeLoginHandoffOptions = {}) {
+    this.exitCode = options.exitCode ?? 75;
+    this.delayMs = options.delayMs ?? 250;
+    this.exit = options.exit ?? ((code) => process.exit(code));
+  }
+
+  request(): void {
+    if (this.requested) return;
+    this.requested = true;
+    setTimeout(() => this.exit(this.exitCode), this.delayMs).unref();
+  }
+}