besttechfrom.eu/app/Http/Controllers/UpvoteController.php

<?php

namespace App\Http\Controllers;

use App\Models\Product;
use App\Models\Upvote;
use Illuminate\Http\JsonResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Facades\Auth;

class UpvoteController extends Controller
{
    /**
     * Display the user's upvoted products.
     */
    public function index()
    {
        $user = Auth::user();

        $upvotes = $user->upvotes()
            ->with(['product.category', 'product.user'])
            ->whereHas('product', function ($query) {
                $query->approved();
            })
            ->latest()
            ->paginate(12);

        return view('upvotes.index', compact('upvotes'));
    }

    /**
     * Toggle upvote for a product.
     */
    public function store(Product $product): JsonResponse
    {
        $user = Auth::user();

        // Check if user already upvoted
        $existingUpvote = Upvote::where('user_id', $user->id)
            ->where('product_id', $product->id)
            ->first();

        if ($existingUpvote) {
            // Remove upvote
            $existingUpvote->delete();
            $upvoted = false;
        } else {
            // Add upvote
            Upvote::create([
                'user_id' => $user->id,
                'product_id' => $product->id,
            ]);
            $upvoted = true;
        }

        // Get fresh upvotes count
        $upvotesCount = $product->upvotes()->count();

        return response()->json([
            'success' => true,
            'upvoted' => $upvoted,
            'upvotesCount' => $upvotesCount,
        ]);
    }
}