first commit

plugins/schemaorg/book/src/Extension/Book.php

@@ -0,0 +1,92 @@
+<?php
+
+/**
+ * @package     Joomla.Plugin
+ * @subpackage  Schemaorg.book
+ *
+ * @copyright   (C) 2023 Open Source Matters, Inc. <https://www.joomla.org>
+ * @license     GNU General Public License version 2 or later; see LICENSE.txt
+ */
+
+namespace Joomla\Plugin\Schemaorg\Book\Extension;
+
+use Joomla\CMS\Event\Plugin\System\Schemaorg\BeforeCompileHeadEvent;
+use Joomla\CMS\Plugin\CMSPlugin;
+use Joomla\CMS\Schemaorg\SchemaorgPluginTrait;
+use Joomla\CMS\Schemaorg\SchemaorgPrepareDateTrait;
+use Joomla\Event\Priority;
+use Joomla\Event\SubscriberInterface;
+
+// phpcs:disable PSR1.Files.SideEffects
+\defined('_JEXEC') or die;
+// phpcs:enable PSR1.Files.SideEffects
+
+/**
+ * Schemaorg Plugin
+ *
+ * @since  5.0.0
+ */
+final class Book extends CMSPlugin implements SubscriberInterface
+{
+    use SchemaorgPluginTrait;
+    use SchemaorgPrepareDateTrait;
+
+    /**
+     * Load the language file on instantiation.
+     *
+     * @var    boolean
+     * @since  5.0.0
+     */
+    protected $autoloadLanguage = true;
+
+    /**
+     * The name of the schema form
+     *
+     * @var   string
+     * @since 5.0.0
+     */
+    protected $pluginName = 'Book';
+
+    /**
+     * Returns an array of events this subscriber will listen to.
+     *
+     * @return  array
+     *
+     * @since   5.0.0
+     */
+    public static function getSubscribedEvents(): array
+    {
+        return [
+            'onSchemaPrepareForm'       => 'onSchemaPrepareForm',
+            'onSchemaBeforeCompileHead' => ['onSchemaBeforeCompileHead', Priority::BELOW_NORMAL],
+        ];
+    }
+
+    /**
+     * Cleanup all Book types
+     *
+     * @param   BeforeCompileHeadEvent  $event  The given event
+     *
+     * @return  void
+     *
+     * @since   5.0.0
+     */
+    public function onSchemaBeforeCompileHead(BeforeCompileHeadEvent $event): void
+    {
+        $schema = $event->getSchema();
+
+        $graph = $schema->get('@graph');
+
+        foreach ($graph as &$entry) {
+            if (!isset($entry['@type']) || $entry['@type'] !== 'Book') {
+                continue;
+            }
+
+            if (!empty($entry['datePublished'])) {
+                $entry['datePublished'] = $this->prepareDate($entry['datePublished']);
+            }
+        }
+
+        $schema->set('@graph', $graph);
+    }
+}