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<?php
/* Icinga PDF Export | (c) 2018 Icinga GmbH | GPLv2 */
namespace Icinga\Module\Pdfexport\ProvidedHook;
use Exception;
use Icinga\Application\Config;
use Icinga\Application\Hook;
use Icinga\Application\Hook\PdfexportHook;
use Icinga\Application\Icinga;
use Icinga\Module\Pdfexport\HeadlessChrome;
use Icinga\Module\Pdfexport\PrintableHtmlDocument;
use iio\libmergepdf\Driver\TcpdiDriver;
use iio\libmergepdf\Merger;
class Pdfexport extends PdfexportHook
{
public static function first()
{
$pdfexport = null;
if (Hook::has('Pdfexport')) {
$pdfexport = Hook::first('Pdfexport');
if (! $pdfexport->isSupported()) {
throw new Exception(
sprintf("Can't export: %s does not support exporting PDFs", get_class($pdfexport))
);
}
}
if (! $pdfexport) {
throw new Exception("Can't export: No module found which provides PDF export");
}
return $pdfexport;
}
public static function getBinary()
{
return Config::module('pdfexport')->get('chrome', 'binary', '/usr/bin/google-chrome');
}
public static function getForceTempStorage()
{
return (bool) Config::module('pdfexport')->get('chrome', 'force_temp_storage', '0');
}
public static function getHost()
{
return Config::module('pdfexport')->get('chrome', 'host');
}
public static function getPort()
{
return Config::module('pdfexport')->get('chrome', 'port', 9222);
}
public function isSupported()
{
try {
return $this->chrome()->getVersion() >= 59;
} catch (Exception $e) {
return false;
}
}
public function htmlToPdf($html)
{
// Keep reference to the chrome object because it is using temp files which are automatically removed when
// the object is destructed
$chrome = $this->chrome();
$pdf = $chrome->fromHtml($html, static::getForceTempStorage())->toPdf();
if ($html instanceof PrintableHtmlDocument && ($coverPage = $html->getCoverPage()) !== null) {
$coverPagePdf = $chrome
->fromHtml(
(new PrintableHtmlDocument())
->add($coverPage)
->addAttributes($html->getAttributes())
->removeMargins(),
static::getForceTempStorage()
)
->toPdf();
$merger = new Merger(new TcpdiDriver());
$merger->addRaw($coverPagePdf);
$merger->addRaw($pdf);
$pdf = $merger->merge();
}
return $pdf;
}
public function streamPdfFromHtml($html, $filename)
{
$filename = basename($filename, '.pdf') . '.pdf';
// Keep reference to the chrome object because it is using temp files which are automatically removed when
// the object is destructed
$chrome = $this->chrome();
$pdf = $chrome->fromHtml($html, static::getForceTempStorage())->toPdf();
if ($html instanceof PrintableHtmlDocument && ($coverPage = $html->getCoverPage()) !== null) {
$coverPagePdf = $chrome
->fromHtml(
(new PrintableHtmlDocument())
->add($coverPage)
->addAttributes($html->getAttributes())
->removeMargins(),
static::getForceTempStorage()
)
->toPdf();
$merger = new Merger(new TcpdiDriver());
$merger->addRaw($coverPagePdf);
$merger->addRaw($pdf);
$pdf = $merger->merge();
}
Icinga::app()->getResponse()
->setHeader('Content-Type', 'application/pdf', true)
->setHeader('Content-Disposition', "inline; filename=\"$filename\"", true)
->setBody($pdf)
->sendResponse();
exit;
}
/**
* Create an instance of HeadlessChrome from configuration
*
* @return HeadlessChrome
*/
protected function chrome()
{
$chrome = new HeadlessChrome();
$chrome->setBinary(static::getBinary());
if (($host = static::getHost()) !== null) {
$chrome->setRemote($host, static::getPort());
}
return $chrome;
}
}
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