transformer: make get_supported_post_types static and refactor

includes/transformer/class-base.php

@@ -19,6 +19,11 @@ use function Activitypub\site_supports_blocks;
 
 /**
  * Base class to implement WordPress to ActivityPub transformers.
+ *
+ * All have to be extended from this one. It provides some WordPress typical
+ * getter functions, that you might want to use:
+ *
+ *
  */
 abstract class Base {
 	/**
@@ -28,6 +33,41 @@ abstract class Base {
 	 */
 	protected $wp_post;
 
+	/**
+	 * Get the name used for registering the transformer with the ActivityPub plugin.
+	 *
+	 * @since version_number_transformer_management_placeholder
+	 * @return string name
+	 */
+	abstract public function get_name();
+
+	/**
+	 * Get the display name for the ActivityPub transformer.
+	 *
+	 * @since version_number_transformer_management_placeholder
+	 * @return string display name
+	 */
+	abstract public function get_label();
+
+	/**
+	 * Returns the ActivityStreams 2.0 Object-Type for a Post.
+	 *
+	 * @see https://www.w3.org/TR/activitystreams-vocabulary/#activity-types
+	 *
+	 * @return string The Object-Type.
+	 */
+	abstract protected function get_object_type();
+
+	/**
+	 * Transforms the WP_Post object to an ActivityPub Object
+	 *
+	 * @see \Activitypub\Activity\Base_Object
+	 * @param WP_Post $wp_post The WordPress Post
+	 *
+	 * @return \Activitypub\Activity\Base_Object The ActivityPub Object
+	 */
+	abstract public function transform();
+
 	/**
 	 * Getter function for this wp_post.
 	 *
@@ -67,7 +107,7 @@ abstract class Base {
 	 * @since version_number_transformer_management_placeholder
 	 * @return string[] An array containing all the supported post types.
 	 */
-	public function get_supported_post_types() {
+	public static function get_supported_post_types() {
 		return \get_post_types( array( 'public' => true ), 'names' );
 	}
 
@@ -78,7 +118,7 @@ abstract class Base {
 	 * @since version_number_transformer_management_placeholder
 	 * @return string Plugin name
 	 */
-	private function get_plugin_name_from_transformer_instance( $transformer ) {
+	final private function get_plugin_name_from_transformer_instance( $transformer ) {
 		$class_reflection = new \ReflectionClass( $transformer );
 
 		$plugin_basename = plugin_basename( $class_reflection->getFileName() );
@@ -105,31 +145,6 @@ abstract class Base {
 		return in_array( $post_type, $this->get_supported_post_types(), true );
 	}
 
-	/**
-	 * Get the name used for registering the transformer with the ActivityPub plugin.
-	 *
-	 * @since version_number_transformer_management_placeholder
-	 * @return string name
-	 */
-	abstract public function get_name();
-
-	/**
-	 * Get the display name for the ActivityPub transformer.
-	 *
-	 * @since version_number_transformer_management_placeholder
-	 * @return string display name
-	 */
-	abstract public function get_label();
-
-	/**
-	 * Returns the ActivityStreams 2.0 Object-Type for a Post.
-	 *
-	 * @see https://www.w3.org/TR/activitystreams-vocabulary/#activity-types
-	 *
-	 * @return string The Object-Type.
-	 */
-	abstract protected function get_object_type();
-
 	/**
 	 * Returns the content for the ActivityPub Item.
 	 *
@@ -481,7 +496,6 @@ abstract class Base {
 		return $image;
 	}
 
-
 	/**
 	 * Helper function to get the @-Mentions from the post content.
 	 *
@@ -548,7 +562,6 @@ abstract class Base {
 		return $tags;
 	}
 
-
 	/**
 	 * Returns the locale of the post.
 	 *
@@ -582,14 +595,4 @@ abstract class Base {
 			$this->get_locale() => $this->get_content(),
 		);
 	}
-
-	/**
-	 * Transforms the WP_Post object to an ActivityPub Object
-	 *
-	 * @see \Activitypub\Activity\Base_Object
-	 * @param WP_Post $wp_post The WordPress Post
-	 *
-	 * @return \Activitypub\Activity\Base_Object The ActivityPub Object
-	 */
-	abstract public function transform();
 }