feat: Preview processor

EMS/common-bundle/src/DependencyInjection/Configuration.php

@@ -28,6 +28,7 @@ public function getConfigTreeBuilder(): TreeBuilder
                 ->variableNode('store_data_services')->defaultValue([])->end()
                 ->booleanNode('profiler')->defaultFalse()->end()
                 ->scalarNode('hash_algo')->defaultValue('sha1')->end()
+                ->scalarNode('preview_url_pattern')->defaultValue('')->end()
                 ->scalarNode('backend_url')->defaultValue(null)->end()
                 ->scalarNode('backend_api_key')->defaultValue(null)->end()
                 ->scalarNode('backend_api_verify')->defaultValue(true)->end()

EMS/common-bundle/src/DependencyInjection/EMSCommonExtension.php

@@ -38,6 +38,7 @@ public function load(array $configs, ContainerBuilder $container): void
         }
 
         $container->setParameter('ems_common.hash_algo', $config['hash_algo']);
+        $container->setParameter('ems_common.preview_url_pattern', $config['preview_url_pattern']);
         $container->setParameter('ems_common.backend_url', $config['backend_url']);
         $container->setParameter('ems_common.backend_api_key', $config['backend_api_key']);
         $container->setParameter('ems_common.backend_api_verify', $config['backend_api_verify']);

EMS/common-bundle/src/Resources/config/storage.xml

@@ -28,9 +28,15 @@
             <argument type="service" id="ems_common.helper.cache" />
             <argument type="string">%kernel.project_dir%</argument>
             <argument type="service" id="file_locator" />
+            <argument type="service" id="ems_common.storage.preview"/>
             <tag name="monolog.logger" channel="ems_common"/>
         </service>
 
+        <service id="ems_common.storage.preview" class="EMS\CommonBundle\Storage\Processor\Preview">
+            <argument type="service" id="Symfony\Contracts\HttpClient\HttpClientInterface" />
+            <argument type="string">%ems_common.preview_url_pattern%</argument>
+        </service>
+
         <service id="ems_common.storage.factory.fs" class="EMS\CommonBundle\Storage\Factory\FileSystemFactory">
             <argument type="service" id="logger" />
             <argument type="string">%kernel.project_dir%</argument>

EMS/common-bundle/src/Storage/Processor/Preview.php

@@ -0,0 +1,39 @@
+<?php
+
+declare(strict_types=1);
+
+namespace EMS\CommonBundle\Storage\Processor;
+
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+class Preview
+{
+    public function __construct(
+        private readonly HttpClientInterface $client,
+        private readonly string $urlPattern,
+    ) {
+    }
+
+    public function generate(Config $config, string $cacheFilename, string $filename): string
+    {
+        if (!\file_exists(\dirname($cacheFilename))) {
+            \mkdir(\dirname($cacheFilename), 0777, true);
+        }
+        $url = \str_replace([
+            '%hash%',
+            '%filename%',
+            '%parameters%',
+        ], [
+            $config->getAssetHash(),
+            $filename,
+            $config->getParameters(),
+        ], $this->urlPattern);
+        \file_put_contents($cacheFilename, $this->client->request(
+            Request::METHOD_GET,
+            $url,
+        )->getContent());
+
+        return $cacheFilename;
+    }
+}

EMS/common-bundle/src/Storage/Processor/Processor.php

@@ -31,6 +31,7 @@ public function __construct(
         private readonly Cache $cacheHelper,
         private readonly string $projectDir,
         private readonly FileLocator $fileLocator,
+        private readonly Preview $previewManager,
     ) {
     }
 
@@ -111,7 +112,7 @@ public function configFactory(string $hash, array $configArray): Config
         return new Config($this->storageManager, $hash, $configHash, $configArray);
     }
 
-    private function generateStream(Config $config, string $cacheFilename): StreamInterface
+    private function generateStream(Config $config, string $cacheFilename, string $filename): StreamInterface
     {
         $file = null;
         if (!$config->isCacheableResult()) {
@@ -127,6 +128,14 @@ private function generateStream(Config $config, string $cacheFilename): StreamIn
 
             return new Stream($resource);
         }
+        if ('preview' === $config->getConfigType()) {
+            $resource = \fopen($this->previewManager->generate($config, $cacheFilename, $filename), 'r');
+            if (false === $resource) {
+                throw new \Exception('It was not possible to open the generated preview');
+            }
+
+            return new Stream($resource);
+        }
 
         if ('zip' === $config->getConfigType()) {
             return $this->generateZip($config);
@@ -226,7 +235,7 @@ public function getStream(Config $config, string $filename, bool $noCache = fals
             }
         }
 
-        return $this->generateStream($config, $cacheFilename);
+        return $this->generateStream($config, $cacheFilename, $filename);
     }
 
     private function getResponseFromStreamInterface(StreamInterface $stream, Request $request): StreamedResponse

elasticms-admin/config/packages/ems_common.yaml

@@ -34,6 +34,7 @@ parameters:
     env(EMS_WEBALIZE_REMOVABLE_REGEX): '/([^a-zA-Z0-9\_\|\ \-\.])|(\.$)/'
     env(EMS_WEBALIZE_DASHABLE_REGEX): '/[\/\_\|\ \-]+/'
     env(EMS_EXCLUDED_CONTENT_TYPES): '[]'
+    env(EMS_PREVIEW_URL_PATTERN): ''
 
 ems_common:
     hash_algo: '%env(string:EMS_HASH_ALGO)%'
@@ -46,6 +47,7 @@ ems_common:
     backend_api_key: '%env(string:EMS_BACKEND_API_KEY)%'
     backend_api_verify: '%env(bool:EMS_BACKEND_API_VERIFY)%'
     excluded_content_types: '%env(json:EMS_EXCLUDED_CONTENT_TYPES)%'
+    preview_url_pattern: '%env(string:EMS_PREVIEW_URL_PATTERN)%'
     webalize:
         removable_regex: '%env(string:EMS_WEBALIZE_REMOVABLE_REGEX)%'
         dashable_regex: '%env(string:EMS_WEBALIZE_DASHABLE_REGEX)%'