invoiceninja/app/Jobs/Ledger/LedgerBalanceUpdate.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com).
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2022. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://www.elastic.co/licensing/elastic-license
 */

namespace App\Jobs\Ledger;

use App\Libraries\MultiDB;
use App\Models\Company;
use App\Models\CompanyLedger;
use Illuminate\Bus\Queueable;
use Illuminate\Contracts\Queue\ShouldQueue;
use Illuminate\Foundation\Bus\Dispatchable;
use Illuminate\Queue\InteractsWithQueue;
use Illuminate\Queue\SerializesModels;

class LedgerBalanceUpdate implements ShouldQueue
{
    use Dispatchable, InteractsWithQueue, Queueable, SerializesModels;

    public function __construct()
    {
    }

    /**
     * Execute the job.
     *
     *
     * @return void
     */
    public function handle()
    {

        if (! config('ninja.db.multi_db_enabled')) {
            $this->check();
        } else {
            //multiDB environment, need to
            foreach (MultiDB::$dbs as $db) {
                MultiDB::setDB($db);

                $this->check();
            }
        }

    }

    public function check()
    {

        CompanyLedger::where('balance', 0)->cursor()->each(function ($company_ledger){

            if($company_ledger->balance > 0)
                return;

            $last_record =  CompanyLedger::where('client_id', $company_ledger->client_id)
                            ->where('company_id', $company_ledger->company_id)
                            ->where('balance', '!=', 0)
                            ->orderBy('id', 'DESC')
                            ->first();

            if(!$last_record)
                return;

            $company_ledger->balance = $last_record->balance + $company_ledger->adjustment;
            $company_ledger->save();

        });

    }

}