Introduce Controller\MetaFilterApi #56

inc/Controller/MetaFilterApi.php

@@ -0,0 +1,54 @@
+<?php # -*- coding: utf-8 -*-
+
+namespace W2M\Controller;
+
+use
+	W2M\Import\Data;
+
+/**
+ * Class MetaFilterApi
+ *
+ * Applies w2m_import_meta_filter to the meta filter list to allow
+ * third party code to adapt the filters.
+ *
+ * @package W2M\Controller
+ */
+class MetaFilterApi {
+
+	/**
+	 * @var Data\MetaFilterListInterface
+	 */
+	private $filter_list;
+
+	private $postponed_filter_list;
+
+	/**
+	 * @param Data\MetaFilterListInterface $filter_list
+	 * @param $postponed_filter_list (Todo: specify implement this)
+	 */
+	public function __construct(
+		Data\MetaFilterListInterface $filter_list,
+		$postponed_filter_list = NULL
+	) {
+
+		$this->filter_list           = $filter_list;
+		$this->postponed_filter_list = $postponed_filter_list;
+	}
+
+	/**
+	 * Applies w2m_import_meta_filter to the meta filter list to allow
+	 * third party code to adapt the filters.
+	 */
+	public function register_filter() {
+
+		/**
+		 * Use this hook to register filters to specific meta keys for specific
+		 * element types
+		 *
+		 * @see \W2M\Import\Filter\ValueFilterableInterface
+		 *
+		 * @param Data\MetaFilterListInterface
+		 */
+		do_action( 'w2m_import_meta_filter', $this->filter_list );
+	}
+}

readme.md

@@ -99,6 +99,7 @@ Use the installer via back-end of your install or ...
 * `w2m_import_term_ancestor_resolving_start` in `W2M\Import\Module\ResolvingPendingRelations::resolving_terms()`
 
 * `w2m_import_meta_not_filterable` in `W2M\Import\Filter\ImportMetaFilter::filter_value()`
+* `w2m_import_meta_filter` in `W2M\Controller\MetaFilterApi::register_filter()`
 
 
 ## Other Notes