invoiceninja/app/Repositories/QuoteRepository.php

<?php
/**
 * Invoice Ninja (https://invoiceninja.com)
 *
 * @link https://github.com/invoiceninja/invoiceninja source repository
 *
 * @copyright Copyright (c) 2019. Invoice Ninja LLC (https://invoiceninja.com)
 *
 * @license https://opensource.org/licenses/AAL
 */

namespace App\Repositories;

use App\Helpers\Invoice\InvoiceSum;
use App\Models\Quote;
use Illuminate\Http\Request;

/**
 * QuoteRepository
 */
class QuoteRepository extends BaseRepository
{


    public function getClassName()
    {
        return Quote::class;
    }
    
	public function save(Request $request, Quote $quote) : ?Quote
	{
        $quote->fill($request->input());
        
        $quote->save();


        $invoice_calc = new InvoiceSum($quote, $quote->settings);

        $quote = $invoice_calc->build()->getInvoice();

        //fire events here that cascading from the saving of an invoice
        //ie. client balance update...
        
        return $quote;
	}

}