refactor: dedupe OAuth flow handlers

src/commands/oauth-flow.ts

@@ -0,0 +1,56 @@
+import type { RuntimeEnv } from "../runtime.js";
+import type { WizardPrompter } from "../wizard/prompts.js";
+
+type OAuthPrompt = { message: string; placeholder?: string };
+
+const validateRequiredInput = (value: string) =>
+  value.trim().length > 0 ? undefined : "Required";
+
+export function createVpsAwareOAuthHandlers(params: {
+  isRemote: boolean;
+  prompter: WizardPrompter;
+  runtime: RuntimeEnv;
+  spin: ReturnType<WizardPrompter["progress"]>;
+  openUrl: (url: string) => Promise<unknown>;
+  localBrowserMessage: string;
+  manualPromptMessage?: string;
+}): {
+  onAuth: (event: { url: string }) => Promise<void>;
+  onPrompt: (prompt: OAuthPrompt) => Promise<string>;
+} {
+  const manualPromptMessage =
+    params.manualPromptMessage ??
+    "Paste the redirect URL (or authorization code)";
+  let manualCodePromise: Promise<string> | undefined;
+
+  return {
+    onAuth: async ({ url }) => {
+      if (params.isRemote) {
+        params.spin.stop("OAuth URL ready");
+        params.runtime.log(
+          `\nOpen this URL in your LOCAL browser:\n\n${url}\n`,
+        );
+        manualCodePromise = params.prompter
+          .text({
+            message: manualPromptMessage,
+            validate: validateRequiredInput,
+          })
+          .then((value) => String(value));
+        return;
+      }
+
+      params.spin.update(params.localBrowserMessage);
+      await params.openUrl(url);
+      params.runtime.log(`Open: ${url}`);
+    },
+    onPrompt: async (prompt) => {
+      if (manualCodePromise) return manualCodePromise;
+      const code = await params.prompter.text({
+        message: prompt.message,
+        placeholder: prompt.placeholder,
+        validate: validateRequiredInput,
+      });
+      return String(code);
+    },
+  };
+}