Introducing a MetaFilterList #56

inc/Import/Data/MetaFilterList.php

@@ -0,0 +1,98 @@
+<?php # -*- coding: utf-8 -*-
+
+namespace W2M\Import\Data;
+
+use
+	W2M\Import\Filter;
+
+/**
+ * Class MetaFilterList
+ *
+ * Manages a list of Filter\ValueFilterableInterface for each type:meta-key pair
+ *
+ * @package W2M\Import\Data
+ */
+class MetaFilterList implements MetaFilterListInterface {
+
+	/**
+	 * @var Filter\ValueFilterableInterface[][]
+	 */
+	private $filters;
+
+	public function __construct() {
+
+		$this->filters = [
+			'comment' => [],
+			'post'    => [],
+			'term'    => [],
+			'user'    => []
+		];
+	}
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 * @param Filter\ValueFilterableInterface $filter
+	 *
+	 * @return bool
+	 */
+	public function push_filter( $type, $key, Filter\ValueFilterableInterface $filter ) {
+
+		$this->setup_list( $type, $key );
+		$index = spl_object_hash( $filter );
+		if ( isset( $this->filters[ $type ][ $key ][ $index ] ) )
+			return FALSE;
+
+		$this->filters[ $type ][ $key ][ $index ] = $filter;
+
+		return TRUE;
+	}
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 * @param Filter\ValueFilterableInterface $filter
+	 *
+	 * @return bool
+	 */
+	public function pop_filter( $type, $key, Filter\ValueFilterableInterface $filter ) {
+
+		$this->setup_list( $type, $key );
+		$index = spl_object_hash( $filter );
+		if ( isset( $this->filters[ $type ][ $key ][ $index ] ) ) {
+			unset( $this->filters[ $type ][ $key ][ $index ] );
+
+			return TRUE;
+		}
+
+		return FALSE;
+	}
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 *
+	 * @return Filter\ValueFilterableInterface[]
+	 */
+	public function get_filters( $type, $key ) {
+
+		$this->setup_list( $type, $key );
+
+		return isset( $this->filters[ $type ][ $key ] )
+			? $this->filters[ $type ][ $key ]
+			: [];
+	}
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 */
+	private function setup_list( $type, $key ) {
+
+		if ( isset( $this->filters[ $type ][ $key ] ) )
+			return;
+
+		$this->filters[ $type ][ $key ] = [];
+	}
+
+}

inc/Import/Data/MetaFilterListInterface.php

@@ -0,0 +1,42 @@
+<?php # -*- coding: utf-8 -*-
+
+namespace W2M\Import\Data;
+
+use
+	W2M\Import\Filter;
+
+/**
+ * Interface MetaFilterListInterface
+ *
+ * Manages a list of Filter\ValueFilterableInterface for each type:meta-key pair
+ *
+ * @package W2M\Import\Data
+ */
+interface MetaFilterListInterface {
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 * @param Filter\ValueFilterableInterface $filter
+	 *
+	 * @return bool
+	 */
+	public function push_filter( $type, $key, Filter\ValueFilterableInterface $filter );
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 * @param Filter\ValueFilterableInterface $filter
+	 *
+	 * @return bool
+	 */
+	public function pop_filter( $type, $key, Filter\ValueFilterableInterface $filter );
+
+	/**
+	 * @param string $type
+	 * @param string $key
+	 *
+	 * @return Filter\ValueFilterableInterface[]
+	 */
+	public function get_filters( $type, $key );
+}

tests/phpunit/Unit/Import/Data/MetaFilterListTest.php

@@ -0,0 +1,28 @@
+<?php # -*- coding: utf-8 -*-
+
+namespace W2M\Test\Unit\Import\Data;
+
+use
+	W2M\Import\Filter,
+	W2M\Test\Helper;
+
+class MetaFilterListTest extends Helper\MonkeyTestCase {
+
+	public function test_push_filter() {
+
+		// Todo: Write tests
+		$this->markTestIncomplete( 'Under construction' );
+	}
+
+	public function test_pop_filter() {
+
+		// Todo: Write tests
+		$this->markTestIncomplete( 'Under construction' );
+	}
+
+	public function test_get_filters() {
+
+		// Todo: Write tests
+		$this->markTestIncomplete( 'Under construction' );
+	}
+}