Add support for term meta data

class-wxr-importer.php

@@ -1624,6 +1624,11 @@ protected function parse_term_node( $node, $type = 'term' ) {
 			$key = array_search( $child->tagName, $tag_name );
 			if ( $key ) {
 				$data[ $key ] = $child->textContent;
+			} elseif ( $child->tagName === 'wp:termmeta' ) {
+				$meta_item = $this->parse_meta_node( $child );
+				if ( ! empty( $meta_item ) ) {
+					$meta[] = $meta_item;
+				}
 			}
 		}
 
@@ -1742,6 +1747,8 @@ protected function process_term( $data, $meta ) {
 			$term_id
 		) );
 
+		$this->process_term_meta( $meta, $term_id, $term );
+
 		do_action( 'wp_import_insert_term', $term_id, $data );
 
 		/**
@@ -1753,6 +1760,47 @@ protected function process_term( $data, $meta ) {
 		do_action( 'wxr_importer.processed.term', $term_id, $data );
 	}
 
+	/**
+	 * Process and import term meta items.
+	 *
+	 * @param array $meta List of meta data arrays
+	 * @param int $term_id Term ID to associate with
+	 * @param array $term Term data
+	 * @return int|bool Number of meta items imported on success, false otherwise.
+	 */
+	protected function process_term_meta( $meta, $term_id, $term ) {
+		if ( empty( $meta ) ) {
+			return true;
+		}
+
+		foreach ( $meta as $meta_item ) {
+			/**
+			 * Pre-process term meta data.
+			 *
+			 * @param array $meta_item Meta data. (Return empty to skip.)
+			 * @param int $term_id Term the meta is attached to.
+			 */
+			$meta_item = apply_filters( 'wxr_importer.pre_process.term_meta', $meta_item, $term_id );
+			if ( empty( $meta_item ) ) {
+				continue;
+			}
+
+			$key = apply_filters( 'import_term_meta_key', $meta_item['key'], $term_id, $term );
+
+			if ( ! $key ) {
+				continue;
+			}
+
+			// export gets meta straight from the DB so could have a serialized string
+			$value = maybe_unserialize( $meta_item['value'] );
+
+			add_term_meta( $term_id, $key, $value );
+			do_action( 'import_term_meta', $term_id, $key, $value );
+		}
+
+		return true;
+	}
+
 	/**
 	 * Attempt to download a remote file attachment
 	 *