movies/app/Http/Controllers/Forum/ThreadsController.php

<?php

namespace App\Http\Controllers\Forum;

use App\Http\Controllers\Controller;
use App\Models\Forum\Category;
use App\Models\Forum\Thread;
use App\Models\Forum\Topic;
use Illuminate\Http\Request;

class ThreadsController extends Controller
{
    public function show(string $categorySlug, string $threadSlug)
    {
        $category = Category::where('slug', $categorySlug)->first();
        $thread = Thread::where('slug', $threadSlug)->first();

        if (!$category || !$thread) {
            abort(404);
        }

        $topics = Topic::with('author')
            ->where('category_id', $category->id)
            ->where('thread_id', $thread->id)
            ->paginate(15);

        return view('forum.thread', compact('category', 'thread', 'topics'));
    }
}