add euf_hero migration

config/services.yml

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+services:
+  _defaults:
+    autoconfigure: true
+
+  Nutshell\Herolement\Migration\EufHeroMigration:
+    arguments: [ '@database_connection' ]
+    tags: [ 'contao.migration' ]

src/DependencyInjection/NutshellHeroElementExtension.php

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+<?php
+
+declare(strict_types=1);
+
+/*
+ * Card Element for Contao Open Source CMS.
+ *
+ * @copyright  Copyright (c) 2022, Erdmann & Freunde
+ * @author     Erdmann & Freunde <https://erdmann-freunde.de>
+ * @license    MIT
+ * @link       http://github.com/nutshell-framework/hero-element
+ */
+
+namespace Nutshell\HeroElement\DependencyInjection;
+
+use Symfony\Component\Config\FileLocator;
+use Symfony\Component\DependencyInjection\ContainerBuilder;
+use Symfony\Component\DependencyInjection\Extension\Extension;
+use Symfony\Component\DependencyInjection\Loader\YamlFileLoader;
+
+class NutshellHeroElementExtension extends Extension
+{
+    public function load(array $configs, ContainerBuilder $container)
+    {
+        $loader = new YamlFileLoader($container, new FileLocator(__DIR__.'/../../config'));
+        $loader->load('services.yml');
+    }
+}

src/Migration/EufHeroMigration.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Card Element for Contao Open Source CMS.
+ *
+ * @copyright  Copyright (c) 2022, Erdmann & Freunde
+ * @author     Erdmann & Freunde <https://erdmann-freunde.de>
+ * @license    MIT
+ * @link       http://github.com/nutshell-framework/hero-element
+ */
+
+namespace Nutshell\HeroElement\Migration;
+
+use Contao\CoreBundle\Migration\AbstractMigration;
+use Contao\CoreBundle\Migration\MigrationResult;
+use Doctrine\DBAL\Connection;
+
+class EufHeroMigration extends AbstractMigration
+{
+    /**
+     * @var Connection
+     */
+    private $connection;
+
+    public function __construct(Connection $connection)
+    {
+        $this->connection = $connection;
+    }
+
+    public function shouldRun(): bool
+    {
+        $schemaManager = $this->connection->getSchemaManager();
+
+        $columns = $schemaManager->listTableColumns('tl_content');
+
+        return
+            isset($columns['singleSRC']) &&
+            !isset($columns['heroBackgroundImage']);
+
+        return
+            $this->connection->fetchOne(
+                "SELECT COUNT(*) FROM tl_content WHERE type = 'hero'"
+            ) > 0;
+    }
+
+    public function run(): MigrationResult
+    {
+        $this->connection->executeQuery("
+            ALTER TABLE
+                tl_content
+
+            ADD heroBackgroundImage binary(16) NULL,
+            ADD heroSize varchar(128) NOT NULL default ''
+        ");
+
+        $stmt = $this->connection->prepare('
+            UPDATE
+                tl_content
+            SET
+                heroBackgroundImage = singleSRC,
+                heroSize = size,
+            WHERE
+                type = :type
+        ');
+
+        $stmt->bindValue('type', 'card');
+        $stmt->execute();
+
+        return $this->createResult(true, 'Migrate euf_hero to hero-element');
+    }
+}