Attendize/app/Http/Controllers/API/PublicController.php

<?php

namespace App\Http\Controllers\API;

use App\Models\Category;
use App\Models\Event;
use Carbon\Carbon;
use Illuminate\Http\Request;
use App\Http\Controllers\Controller;

class PublicController extends Controller
{
    public function getCategories($parent_id = false){
        $categories = Category::select('title_tk','title_ru','id','parent_id');

        if($parent_id)
            $categories->children($parent_id);
        else
            $categories->main();
        return response()->json($categories->get());
//        return $categories->get();
    }

    public function showCategoryEvents($cat_id){

        $category = Category::select('id','title_tk','title_ru','view_type','events_limit','parent_id')
            ->findOrFail($cat_id);

        [$order, $data] = $this->sorts_filters();
        $data['category'] = $category;
        $data['sub_cats'] = $category->children()
            ->withLiveEvents($order, $data['start'], $data['end'], $category->events_limit)
            ->whereHas('cat_events',
                function ($query) use($data){
                    $query->onLive($data['start'], $data['end']);
                })->get();


        return response()->json($data);
    }

    private function sorts_filters(){
        $data['start'] = \request()->get('start') ?? Carbon::today();
        $data['end'] = \request()->get('end')?? Carbon::today()->endOfCentury();
        $sort = \request()->get('sort');

        if($sort == 'new')
            $orderBy = ['field'=>'created_at','order'=>'desc'];
        if ($sort =='popular')
            $orderBy = ['field'=>'views','order'=>'desc'];
        else
        {
            $orderBy =['field'=>'start_date','order'=>'asc'];
            $sort = 'start_date';
        }
        $data['sort'] = $sort;
        //todo check date formats;
        return [$orderBy, $data];
    }
    public function showSubCategoryEvents($cat_id){
        $category = Category::select('id','title_tk','title_ru','view_type','events_limit','parent_id')
            ->findOrFail($cat_id);

        [$order, $data] = $this->sorts_filters();

        $data['category'] = $category;

        $data['events'] = $category->cat_events()
            ->onLive($data['start'],$data['end'])
            ->orderBy($order['field'],$order['order'])
            ->get();

        return response()->json($data);
    }

    public function getEvent($id){
        $event = Event::with('images')->findOrFail($id);
        return response()->json($event);
    }
}