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<?php
/**
 * @package Polylang
 */

/**
 * Manages the compatibility with WordPress Importer.
 *
 * @since 2.8
 */
class PLL_WordPress_Importer {

/**
	 * Setups filters.
	 *
	 * @since 2.8
	 */
	public function __construct() {
		add_action( 'init', array( $this, 'maybe_wordpress_importer' ) );
		add_filter( 'wp_import_terms', array( $this, 'wp_import_terms' ) );
	}

/**
	 * If WordPress Importer is active, replace the wordpress_importer_init function.
	 *
	 * @since 1.2
	 */
	public function maybe_wordpress_importer() {
		if ( defined( 'WP_LOAD_IMPORTERS' ) && class_exists( 'WP_Import' ) ) {
			remove_action( 'admin_init', 'wordpress_importer_init' );
			add_action( 'admin_init', array( $this, 'wordpress_importer_init' ) );
		}
	}

/**
	 * Loads our child class PLL_WP_Import instead of WP_Import.
	 *
	 * @since 1.2
	 */
	public function wordpress_importer_init() {
		$class = new ReflectionClass( 'WP_Import' );
		load_plugin_textdomain( 'wordpress-importer', false, basename( dirname( $class->getFileName() ) ) . '/languages' );

$GLOBALS['wp_import'] = new PLL_WP_Import();
		register_importer( 'wordpress', 'WordPress', __( 'Import <strong>posts, pages, comments, custom fields, categories, and tags</strong> from a WordPress export file.', 'polylang' ), array( $GLOBALS['wp_import'], 'dispatch' ) ); // phpcs:ignore WordPress.WP.CapitalPDangit.Misspelled
	}

/**
	 * Sets the flag when importing a language and the file has been exported with Polylang < 1.8.
	 *
	 * @since 1.8
	 *
	 * @param array $terms An array of arrays containing terms information form the WXR file.
	 * @return array
	 */
	public function wp_import_terms( $terms ) {
		$languages = include POLYLANG_DIR . '/settings/languages.php';

foreach ( $terms as $key => $term ) {
			if ( 'language' === $term['term_taxonomy'] ) {
				$description = maybe_unserialize( $term['term_description'] );
				if ( empty( $description['flag_code'] ) && isset( $languages[ $description['locale'] ] ) ) {
					$description['flag_code'] = $languages[ $description['locale'] ]['flag'];
					$terms[ $key ]['term_description'] = maybe_serialize( $description );
				}
			}
		}
		return $terms;
	}
}