invoiceninja/app/Http/Requests/RecurringInvoice/StoreRecurringInvoiceRequest.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\RecurringInvoice;

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

class StoreRecurringInvoiceRequest 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', RecurringInvoice::class);
    }

    public function rules()
    {
        return [
            'documents' => 'mimes:png,ai,svg,jpeg,tiff,pdf,gif,psd,txt,doc,xls,ppt,xlsx,docx,pptx',
            'client_id' => 'required|exists:clients,id',
        ];
    }


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

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

    public function messages()
    {
    }
}