feat(checkout): Streamline checkout process and ad

app/Http/Controllers/CheckoutController.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\Session;
+use Illuminate\Support\Facades\Validator;
+
+class CheckoutController extends Controller
+{
+    public function guestCheckout(Request $request)
+    {
+        $cart = $request->session()->get('cart', []);
+        $request->session()->put('guest_cart', $cart);
+        $request->session()->put('is_guest', true);
+    }
+
+    public function checkout(Request $request)
+    {
+        if ($request->session()->get('is_guest', false)) {
+            $this->guestCheckout($request);
+        }
+
+        // Streamline checkout steps
+        $checkoutData = $request->only(['email', 'shipping_address', 'payment_method']);
+        $this->verifyPaymentAndShippingInfo($checkoutData);
+
+        // Proceed with checkout logic...
+    }
+
+    protected function verifyPaymentAndShippingInfo(array $data)
+    {
+        $validator = Validator::make($data, [
+            'email' => 'required|email',
+            'shipping_address' => 'required|string|max:255',
+            'payment_method' => 'required|string|max:255',
+        ]);
+
+        if ($validator->fails()) {
+            throw new \Illuminate\Validation\ValidationException($validator);
+        }
+
+        // Verification logic...
+    }
+}