plugin install

wp/wp-content/plugins/woocommerce/includes/interfaces/class-wc-importer-interface.php

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+<?php
+/**
+ * WooCommerce Importer Interface
+ *
+ * @package  WooCommerce\Interface
+ * @version  3.1.0
+ */
+
+/**
+ * WC_Importer_Interface class.
+ */
+interface WC_Importer_Interface {
+
+	/**
+	 * Process importation.
+	 * Returns an array with the imported and failed items.
+	 * 'imported' contains a list of IDs.
+	 * 'failed' contains a list of WP_Error objects.
+	 *
+	 * Example:
+	 * ['imported' => [], 'failed' => []]
+	 *
+	 * @return array
+	 */
+	public function import();
+
+	/**
+	 * Get file raw keys.
+	 *
+	 * CSV - Headers.
+	 * XML - Element names.
+	 * JSON - Keys
+	 *
+	 * @return array
+	 */
+	public function get_raw_keys();
+
+	/**
+	 * Get file mapped headers.
+	 *
+	 * @return array
+	 */
+	public function get_mapped_keys();
+
+	/**
+	 * Get raw data.
+	 *
+	 * @return array
+	 */
+	public function get_raw_data();
+
+	/**
+	 * Get parsed data.
+	 *
+	 * @return array
+	 */
+	public function get_parsed_data();
+
+	/**
+	 * Get file pointer position from the last read.
+	 *
+	 * @return int
+	 */
+	public function get_file_position();
+
+	/**
+	 * Get file pointer position as a percentage of file size.
+	 *
+	 * @return int
+	 */
+	public function get_percent_complete();
+}