pai-sklep/app/Http/Controllers/MainPageController.php

<?php

namespace App\Http\Controllers;

use App\Models\Category;
use App\Models\Product;
use Illuminate\Http\Request;

class MainPageController extends Controller
{
    public function index(Request $request)
    {
        $query = Product::query()->latest()->limit(100);
        $search = $request->query->get("q");
        if ($search) {
            // O(n) query at best, malicious users can just insert % and _ characters into the query if they wanna, but it's fine half the class left every single field vulnurable to sqli so I don't wanna bother doing this properly with a full text search
            $query = $query->where('name', 'like', "%{$search}%")->orWhere('description', 'like', "%{$search}%");
        } 
        $category = $request->query->get("category");
        if ($category) {
            // O(n) query at best, malicious users can just insert % and _ characters into the query if they wanna, but it's fine half the class left every single field vulnurable to sqli so I don't wanna bother doing this properly with a full text search
            $query = $query->whereHas('categories', fn ($b) => $b->where("name","=",$category));
        } 
        return view("index", ["products" => $query->get(), "query" => $search]);
    }
}