invoiceninja/app/Http/Requests/Invoice/StoreInvoiceRequest.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2020. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Http\Requests\Invoice;

use App\Http\Requests\Request;
use App\Models\ClientContact;
use App\Models\Invoice;
use App\Utils\Traits\CleanLineItems;
use App\Utils\Traits\MakesHash;

class StoreInvoiceRequest extends Request
{
    use MakesHash;
    use CleanLineItems;

    /**
     * Determine if the user is authorized to make this request.
     *
     * @return bool
     */

    public function authorize() : bool
    {
        return auth()->user()->can('create', Invoice::class);
    }

    public function rules()
    {
        return [
          'client_id' => 'required|exists:clients,id,company_id,'.auth()->user()->company()->id,
        ];
    }

    protected function prepareForValidation()
    {
        $input = $this->all();

        if (array_key_exists('design_id', $input) && is_string($input['design_id'])) {
            $input['design_id'] = $this->decodePrimaryKey($input['design_id']);
        }

        if (array_key_exists('client_id', $input) && is_string($input['client_id'])) {
            $input['client_id'] = $this->decodePrimaryKey($input['client_id']);
        }

        if (isset($input['client_contacts'])) {
            foreach ($input['client_contacts'] as $key => $contact) {
                if (!array_key_exists('send_email', $contact) || !array_key_exists('id', $contact)) {
                    unset($input['client_contacts'][$key]);
                }
            }
        }

        if (isset($input['invitations'])) {
            foreach ($input['invitations'] as $key => $value) {
                if (isset($input['invitations'][$key]['id']) && is_numeric($input['invitations'][$key]['id'])) {
                    unset($input['invitations'][$key]['id']);
                }

                if (isset($input['invitations'][$key]['id']) && is_string($input['invitations'][$key]['id'])) {
                    $input['invitations'][$key]['id'] = $this->decodePrimaryKey($input['invitations'][$key]['id']);
                }

                if (is_string($input['invitations'][$key]['client_contact_id'])) {
                    $input['invitations'][$key]['client_contact_id'] = $this->decodePrimaryKey($input['invitations'][$key]['client_contact_id']);
                }
            }
        }

        $input['line_items'] = isset($input['line_items']) ? $this->cleanItems($input['line_items']) : [];
        //$input['line_items'] = json_encode($input['line_items']);
        $this->replace($input);
    }
}