Proposal to generate an invoice with Gotenberg

composer.json

@@ -8,6 +8,7 @@
         "php": "^8.2",
         "knplabs/knp-snappy-bundle": "^1.10",
         "ramsey/uuid": "^4.7",
+        "sensiolabs/gotenberg-bundle": "^1.0",
         "sylius/grid-bundle": "^1.13",
         "sylius/resource-bundle": "^1.12",
         "sylius/sylius": "^2.0",

config/services/generators.xml

@@ -50,6 +50,7 @@
             <argument type="service" id="sylius_invoicing.generator.invoice_file_name" />
             <argument>@SyliusInvoicingPlugin/shared/download/pdf.html.twig</argument>
             <argument>%sylius_invoicing.template.logo_file%</argument>
+            <argument>%sylius_invoicing.pdf_generator.generate_with_gotenberg%</argument>
         </service>
         <service id="Sylius\InvoicingPlugin\Generator\InvoicePdfFileGeneratorInterface" alias="sylius_invoicing.generator.invoice_pdf_file" />
 

src/DependencyInjection/Configuration.php

@@ -173,6 +173,7 @@ private function addPdfGeneratorSection(ArrayNodeDefinition $node): void
                     ->children()
                         ->booleanNode('enabled')->defaultTrue()
                     ->end()
+                    ->booleanNode('generate_with_gotenberg')->defaultFalse()
                 ->end()
             ->end()
         ;

src/DependencyInjection/SyliusInvoicingExtension.php

@@ -15,11 +15,14 @@
 
 use Sylius\Bundle\CoreBundle\DependencyInjection\PrependDoctrineMigrationsTrait;
 use Sylius\Bundle\ResourceBundle\DependencyInjection\Extension\AbstractResourceExtension;
+use Sylius\InvoicingPlugin\Generator\TwigToGotenbergPdfGenerator;
 use Symfony\Component\Config\Definition\ConfigurationInterface;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Definition;
 use Symfony\Component\DependencyInjection\Extension\PrependExtensionInterface;
 use Symfony\Component\DependencyInjection\Loader\XmlFileLoader;
+use Symfony\Component\DependencyInjection\Reference;
 
 final class SyliusInvoicingExtension extends AbstractResourceExtension implements PrependExtensionInterface
 {
@@ -35,6 +38,15 @@ public function load(array $configs, ContainerBuilder $container): void
 
         $config = $this->processConfiguration($configuration, $configs);
         $container->setParameter('sylius_invoicing.pdf_generator.allowed_files', $config['pdf_generator']['allowed_files']);
+        $container->setParameter('sylius_invoicing.pdf_generator.generate_with_gotenberg', $config['pdf_generator']['generate_with_gotenberg']);
+
+        if ($config['pdf_generator']['generate_with_gotenberg'] === true) {
+            $definition = new Definition(TwigToGotenbergPdfGenerator::class);
+            $definition->addArgument(new Reference('sensiolabs_gotenberg'));
+            $definition->setDecoratedService('sylius_invoicing.generator.twig_to_pdf');
+
+            $container->setDefinition('sylius_invoicing.gotenberg_generator.twig_to_pdf', $definition);
+        }
     }
 
     public function prepend(ContainerBuilder $container): void

src/Generator/InvoicePdfFileGenerator.php

@@ -25,6 +25,7 @@ public function __construct(
         private readonly InvoiceFileNameGeneratorInterface $invoiceFileNameGenerator,
         private readonly string $template,
         private readonly string $invoiceLogoPath,
+        private readonly bool $generateWithGotenberg,
     ) {
     }
 
@@ -38,6 +39,7 @@ public function generate(InvoiceInterface $invoice): InvoicePdf
                 'invoice' => $invoice,
                 'channel' => $invoice->channel(),
                 'invoiceLogoPath' => $this->fileLocator->locate($this->invoiceLogoPath),
+                'generateWithGotenberg' => $this->generateWithGotenberg,
             ],
         );
 

src/Generator/TwigToGotenbergPdfGenerator.php

@@ -0,0 +1,50 @@
+<?php
+
+/*
+ * This file is part of the Sylius package.
+ *
+ * (c) Sylius Sp. z o.o.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Sylius\InvoicingPlugin\Generator;
+
+use Sensiolabs\GotenbergBundle\GotenbergInterface;
+use Sensiolabs\GotenbergBundle\Processor\ProcessorInterface;
+
+final readonly class TwigToGotenbergPdfGenerator implements TwigToPdfGeneratorInterface
+{
+    public function __construct(
+        private GotenbergInterface $gotenberg
+    ) {
+    }
+
+    public function generate(string $templateName, array $templateParams): string
+    {
+        $builder = $this->gotenberg->pdf()
+            ->html()
+            ->content($templateName, $templateParams)
+            ->processor(
+                new class implements ProcessorInterface {
+                    public function __invoke(?string $fileName): \Generator
+                    {
+                        $file = '';
+
+                        do {
+                            $chunk = yield;
+                            $file .= $chunk->getContent();
+                        } while (!$chunk->isLast());
+
+                        return $file;
+                    }
+                }
+            )
+        ;
+
+        return $builder->generate()->process();
+    }
+}

templates/shared/download/pdf_layout.html.twig

@@ -113,7 +113,7 @@
     <table class="layout">
         <tr>
             <td>
-                <img width="160" src="{{ logoPath }}">
+                <img width="160" src="{{ generateWithGotenberg ? gotenberg_asset(logoPath) : logoPath }}">
             </td>
             <td class="text-right">
                 {% block header %}{% endblock %}