ldc-nature-and-respect/app/Http/Controllers/RecipeController.php

<?php

namespace App\Http\Controllers;

use App\Recipe;

class RecipeController extends Controller
{
    /**
     * Display a listing of the resource.
     *
     * @return \Illuminate\Contracts\View\View
     */
    public function index()
    {
        // Get recipies.
        $recipes = Recipe::where('live', '1')->get();
        // Filter poultry.
        $poultries = $recipes->unique('cat')->pluck('cat');
        // Filter difficulty.
        $difficulties = $recipes->unique('difficulty')->pluck('difficulty');
        return view('pages.rezepte', compact(['recipes', 'poultries', 'difficulties']));
    }

    /**
     * Recipe show
     *
     * @param mixed $id
     * @return \Illuminate\Contracts\View\View
     */
    public function show(mixed $id)
    {
        $recipe = Recipe::where('id', $id)->first();
        if ($recipe == null) {
            $recipe = Recipe::where('slug', $id)->first();
            if ($recipe == null) {
                abort(404);
            }
        }
        return view('pages.rezept', compact(['recipe']));
    }
}