Example from readme does not work

[aurel-g]

Hi,

The example usage code given in the readme seems not to work.

I tried with a simplified version of it, in order to just generate XML :

<?php

require 'vendor/autoload.php';

$invoice = new \Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice(
    \Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice::PROFILE_MINIMUM
);
$invoice->setInvoiceNumber("FC123456789");
$invoice->setInvoiceType(Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice::INVOICE_TYPE_COMMERCIAL_INVOICE);
$invoice->setPaymentInstruction(null);
$invoice->setPaymentMeansCode(0);
$invoice->setIssueDate( new \DateTime('today') );
$invoice->setDueDate( (new \DateTime('today'))->modify('+30 days') );
$invoice->setSeller( new \Kinulab\Facturx\CrossIndustryInvoice\LegalEntity() );
$invoice->setBuyer( new \Kinulab\Facturx\CrossIndustryInvoice\LegalEntity() );
$invoice->setCurrencyCode('EUR');
$invoice->setTaxBasisTotalAmount(100);
$invoice->setTaxTotalAmount(5.61);
$invoice->setGrandTotalAmount( 105.61 );
$invoice->setDuePayableAmount( 105.61 );

$seller = $invoice->getSeller();
$seller->setName('My Company Name');
$seller->setSiret('XXXXXX');
$seller->setVatIdentifier( 'XXXXX');
$seller->setAddress( new \Kinulab\Facturx\CrossIndustryInvoice\Address() );

$sellerAddress = $seller->getAddress();
$sellerAddress->setCountryId('FR');

$buyer = $invoice->getBuyer();
$buyer->setName('The Client');
$buyer->setVatIdentifier("ABC123");

echo \Kinulab\Facturx\CrossIndustryInvoice\XmlWriter::write($invoice);

I get the fatal error Typed property Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice::$paymentInstruction must not be accessed before initialization in (...)/vendor/kinulab/facturx/src/CrossIndustryInvoice/CrossIndustryInvoice.php:470

If I add $invoice->setPaymentInstruction(null); I get Typed property Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice::$paymentMeansCode must not be accessed before initialization in (...)/vendor/kinulab/facturx/src/CrossIndustryInvoice/CrossIndustryInvoice.php:210

And finally if I add $invoice->setPaymentMeansCode(0); I get :

<br />
<b>Fatal error</b>:  Uncaught Exception: The MINIMUM XML file is not valid against the official
            XML Schema Definition : Exception: MINIMUM XML file invalid schema : XML error &quot;Element '{urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100}PayeeTradeParty': This element is not expected. Expected is ( {urn:un:unece:uncefact:data:standard:ReusableAggregateBusinessInformationEntity:100}SpecifiedTradeSettlementHeaderMonetarySummation ).
&quot;
 in /var/www/html/vendor/atgp/factur-x/src/Facturx.php:162
Stack trace:
#0 /var/www/html/vendor/kinulab/facturx/src/CrossIndustryInvoice/XmlWriter.php(34): Atgp\FacturX\Facturx-&gt;checkFacturxXsd('&lt;?xml version=&quot;...')
#1 /var/www/html/xml.php(72): Kinulab\Facturx\CrossIndustryInvoice\XmlWriter::write(Object(Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice))
#2 {main}. in /var/www/html/vendor/atgp/factur-x/src/Facturx.php:165
Stack trace:
#0 /var/www/html/vendor/kinulab/facturx/src/CrossIndustryInvoice/XmlWriter.php(34): Atgp\FacturX\Facturx-&gt;checkFacturxXsd('&lt;?xml version=&quot;...')
#1 /var/www/html/xml.php(72): Kinulab\Facturx\CrossIndustryInvoice\XmlWriter::write(Object(Kinulab\Facturx\CrossIndustryInvoice\CrossIndustryInvoice))
#2 {main}
  thrown in <b>/var/www/html/vendor/atgp/factur-x/src/Facturx.php</b> on line <b>165</b><br />

I haven't managed to generate a minimal XML example yet :(