liwo/app/Console/Commands/CostCommand.php

<?php

namespace App\Console\Commands;

use DB;
use App\Business;
use Illuminate\Console\Command;
use Illuminate\Support\Facades\Cache;

class CostCommand extends Command
{
    public const USER_FEE = 400;

    public const FILE_FEE = [
        200 => 0,
        400 => 1000,
        800 => 2000,
    ];

    protected $signature = 'cost:work';

    protected $description = 'Run the cost worker';

    public function __construct()
    {
        parent::__construct();
    }

    public function handle()
    {
        // infinte loop
        while (true) {
            // to baghali ha
            $recorded_month = jdate($business->calculated_at)->format("Y-m-01");

            $calculated_at = Cache::get('calculated_at');
            if ($calculated_at === null) {
                $business = Business::orderBy('calculated_at')->first()->load('users', 'cost');
                $calculated_at = $business->calculated_at;
                $until_now = jdate()->getMonth() > jdate($business->calculated_at)->getMonth()
                    ? jdate($business->calculated_at)->toCarbon()->setTime("00", "00", "00")
                    : \Carbon\Carbon::now();

                Cache::put('calculated_at', $until_now, 60);
            }

            // if calculated_at less than an hour stop
            if (\Carbon\Carbon::now()->diffInMinutes($until_now) <= 60) {
                $this->info('nothing to cost');
                continue;
            }

            try {
                DB::beginTransaction();

                // business order by last_calculated_at take first
                if (!isset($business)) {
                    $business = Business::orderBy('calculated_at')->first()->load('users', 'cost');
                }

                $user_fee = enum('business.fee.user');

                // get business  employee
                $users_cost = $business->cost
                    ->where('type', '=', 'users')
                    ->where('fee', '=', $user_fee)
                    ->where('month', '=', $recorded_month)
                    ->where('amount', '=', $business->users->count())
                    ->first();

                if ($users_cost === null) {
                    $business->cost()->create([
                        'type' => 'users',
                        'month' => $recorded_month,
                        'amount' => $business->users->count(),
                        'fee' => $user_fee,
                        'duration' => $duration =  $until_now->diffInSeconds($calculated_at), // from the created_at time of the newset fifth user
                        'additional' => $business->users->pluck('id')->toArray(),
                    ]);
                } else {
                    $users_cost->update([
                        'duration' => $duration = $until_now->diffInMinutes($calculated_at), // last calc - (current month - now else last calc - end of the past month),
                        'additional' => $business->users->pluck('id')->toArray(),
                    ]);
                }

                $costs = $user_fee * $duration;

                // do the math in php
                if (intdiv($business->files_volume, 200) === 0) {
                    $pads = 0;
                } else {
                    $pads = intdiv($business->files_volume, 200) - 1;
                }

                $file_fee = enum('business.fee.file');

                $files = $business->cost
                    ->where('type', '=', 'files')
                    ->where('fee', '=', $file_fee)
                    ->where('month', '=', $recorded_month)
                    ->where('amount', '=', $business->files_volume)
                    ->first();

                if ($files === null) {
                    $business->cost()->create([
                        'type' => 'files',
                        'month' => $recorded_month,
                        'amount' => $pads,
                        'fee' => $file_fee,
                        'duration' => $duration = $until_now->diffInMinutes($calculated_at), // how to determine the file?,
                    ]);
                } else {
                    $files->update([
                        'duration' => $duration = $until_now->diffInMinutes($calculated_at), // last calc - (current month - now else last calc - end of the past month),,
                    ]);
                }

                $costs += $file_fee * $duration;

                // increment and decrement of wallet in php
                // deduct costs from your business wallet
                // make sure save the calculated_at
                $business->update([
                    'wallet' => $business->wallet - $costs,
                    'calculated_at' => \Carbon\Carbon::now(),
                ]);
                DB::commit();
            } catch (Throwable $thr) {
                DB::rollback();
                throw $thr;
                continue;
            }
        }
    }
}