izyim/app/Classes/Modules/ControllersLogic/Dashboard/OrdersReportLogic.php

<?php

namespace App\Classes\Modules\ControllersLogic\Dashboard;

use App\Models\Order;
use Carbon\Carbon;

class OrdersReportLogic
{
    /** @var  Order */
    private $repository;

    /**
     * OrdersReportLogic constructor.
     * @param Order $repository
     */
    public function __construct(Order $repository)
    {
        $this->repository = $repository;
    }

    public function execute() {
        //Get Warehouse Order
        $Orders= $this->repository->whereYear('created_at', '=', Carbon::now()->year)
            ->whereMonth('created_at', '=', Carbon::now()->month)->orderBy('created_at')->get();

        $group = $Orders->groupBy(function($item) {
            return Carbon::parse($item->created_at)->format('j');
        });

        $groupCount = $group->map(function ($item) {
            return collect($item)->count();
        })->toArray();

        $report = [];
        for($x = 1; $x <= Carbon::now()->daysInMonth; $x++){
            $report[] = isset($groupCount[$x]) ? $groupCount[$x] : 0;

            //Undefined offset:
//            if(array_key_exists($x, $groupCount)){
//                $report[] = $groupCount[$x];
//            } else {
//                $report[] = 0;
//            }

        }

//        dd(Carbon::now()->daysInMonth);
//        dd($groupCount);
//        dd($groupCount["01"]);
        return $report;
    }
}