Replace entire repo content with code from /root/shahikitchen-google/

app/api/auth/google/route.ts

@@ -0,0 +1,47 @@
+import { NextResponse } from 'next/server';
+import { cookies } from 'next/headers';
+import {
+  buildGoogleAuthUrl,
+  createOAuthState,
+  isGoogleOAuthConfigured,
+} from '@/infrastructure/auth/google-oauth';
+import {
+  getOAuthReturnCookieName,
+  sanitizeOAuthReturnPath,
+} from '@/infrastructure/auth/oauth-return';
+
+export const dynamic = 'force-dynamic';
+
+const OAUTH_STATE_COOKIE = 'shahi_google_oauth_state';
+
+export async function GET(request: Request) {
+  if (!isGoogleOAuthConfigured()) {
+    return NextResponse.redirect(new URL('/login?tab=customer&error=google_not_configured', getOrigin()));
+  }
+
+  const url = new URL(request.url);
+  const returnTo = sanitizeOAuthReturnPath(url.searchParams.get('returnTo'));
+
+  const state = createOAuthState();
+  const cookieStore = await cookies();
+  cookieStore.set(OAUTH_STATE_COOKIE, state, {
+    httpOnly: true,
+    secure: process.env.NODE_ENV === 'production',
+    sameSite: 'lax',
+    path: '/',
+    maxAge: 600,
+  });
+  cookieStore.set(getOAuthReturnCookieName(), returnTo, {
+    httpOnly: true,
+    secure: process.env.NODE_ENV === 'production',
+    sameSite: 'lax',
+    path: '/',
+    maxAge: 600,
+  });
+
+  return NextResponse.redirect(buildGoogleAuthUrl(state));
+}
+
+function getOrigin(): string {
+  return process.env.NEXT_PUBLIC_SITE_URL ?? 'http://localhost:3000';
+}