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Editing: admin-sync.php

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

/**
 * Manages copy and synchronization of terms and post metas
 *
 * @since 1.2
 */
class PLL_Admin_Sync extends PLL_Sync {
	/**
	 * @var PLL_Admin_Links
	 */
	private $links;

/**
	 * Constructor
	 *
	 * @since 1.2
	 *
	 * @param PLL_Admin_Base $polylang The Polylang object.
	 */
	public function __construct( &$polylang ) {
		parent::__construct( $polylang );

$this->links = &$polylang->links;

add_filter( 'wp_insert_post_parent', array( $this, 'wp_insert_post_parent' ) );
		add_filter( 'wp_insert_post_data', array( $this, 'wp_insert_post_data' ) );
		add_filter( 'use_block_editor_for_post', array( $this, 'new_post_translation' ), 5000 ); // After content duplication.
	}

/**
	 * Translates the post parent if it exists when using "Add new" (translation).
	 *
	 * @since 0.6
	 * @since 3.8 Removed second and third parameters.
	 *
	 * @param int $post_parent Post parent ID.
	 * @return int
	 */
	public function wp_insert_post_parent( $post_parent ) {
		$context_data = $this->links->get_data_from_new_post_translation_request();

if ( empty( $context_data ) ) {
			return $post_parent;
		}

// Make sure not to impact media translations created at the same time.
		$parent_id = wp_get_post_parent_id( $context_data['from_post'] );

if ( empty( $parent_id ) ) {
			return $post_parent;
		}

$tr_parent = $this->model->post->get_translation( $parent_id, $context_data['new_lang'] );

if ( empty( $tr_parent ) ) {
			return $post_parent;
		}

return $tr_parent;
	}

/**
	 * Copies menu order, comment, ping status and optionally the date when creating a new translation.
	 *
	 * @since 2.5
	 *
	 * @param array $data An array of slashed post data.
	 * @return array
	 */
	public function wp_insert_post_data( $data ) {
		$context_data = $this->links->get_data_from_new_post_translation_request();

if ( empty( $context_data ) ) {
			return $data;
		}

foreach ( array( 'menu_order', 'comment_status', 'ping_status' ) as $property ) {
			$data[ $property ] = $context_data['from_post']->$property;
		}

// Copy the date only if the synchronization is activated.
		if ( in_array( 'post_date', $this->options['sync'], true ) ) {
			$data['post_date']     = $context_data['from_post']->post_date;
			$data['post_date_gmt'] = $context_data['from_post']->post_date_gmt;
		}

return $data;
	}

/**
	 * Copies post metas and taxonomies when using "Add new" (translation).
	 *
	 * @since 2.5
	 * @since 3.1 Use of use_block_editor_for_post filter instead of rest_api_init which is triggered too early in WP 5.8.
	 *
	 * @param bool $is_block_editor Whether the post can be edited or not.
	 * @return bool
	 */
	public function new_post_translation( $is_block_editor ) {
		global $post;
		static $done = array();

if ( empty( $post ) ) {
			return $is_block_editor;
		}

$context_data = $this->links->get_data_from_new_post_translation_request();

if ( empty( $context_data ) || ! empty( $done[ $context_data['from_post']->ID ] ) ) {
			return $is_block_editor;
		}

$lang = $this->model->get_language( $context_data['new_lang'] );

if ( empty( $lang ) ) {
			return $is_block_editor;
		}

$done[ $context_data['from_post']->ID ] = true; // Avoid a second duplication in the block editor. Using an array only to allow multiple phpunit tests.

$this->taxonomies->copy( $context_data['from_post']->ID, $post->ID, $lang->slug );
		$this->post_metas->copy( $context_data['from_post']->ID, $post->ID, $lang->slug );

if ( is_sticky( $context_data['from_post']->ID ) ) {
			stick_post( $post->ID );
		}

return $is_block_editor;
	}

/**
	 * Get post fields to synchronize.
	 *
	 * @since 2.4
	 *
	 * @param WP_Post $post Post object.
	 * @return array Fields to synchronize.
	 */
	protected function get_fields_to_sync( $post ) {
		global $wpdb;

$postarr      = parent::get_fields_to_sync( $post );
		$context_data = $this->links->get_data_from_new_post_translation_request();

// For new drafts, save the date now otherwise it is overridden by WP. Thanks to JoryHogeveen. See #32.
		if ( ! empty( $context_data ) && in_array( 'post_date', $this->options['sync'], true ) ) {
			unset( $postarr['post_date'] );
			unset( $postarr['post_date_gmt'] );

$wpdb->update(
				$wpdb->posts,
				array(
					'post_date'     => $context_data['from_post']->post_date,
					'post_date_gmt' => $context_data['from_post']->post_date_gmt,
				),
				array( 'ID' => $post->ID )
			);
		}

if ( isset( $GLOBALS['post_type'] ) ) {
			$post_type = $GLOBALS['post_type'];
		} elseif ( isset( $_REQUEST['post_type'] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
			// 2nd case for quick edit.
			$post_type = sanitize_key( $_REQUEST['post_type'] ); // phpcs:ignore WordPress.Security.NonceVerification.Recommended
		}

// Make sure not to impact media translations when creating them at the same time as post
		if ( in_array( 'post_parent', $this->options['sync'], true ) && ( ! isset( $post_type ) || $post_type !== $post->post_type ) ) {
			unset( $postarr['post_parent'] );
		}

return $postarr;
	}

/**
	 * Synchronizes post fields in translations.
	 *
	 * @since 1.2
	 *
	 * @param int     $post_id      Post id.
	 * @param WP_Post $post         Post object.
	 * @param int[]   $translations Post translations.
	 */
	public function pll_save_post( $post_id, $post, $translations ) {
		parent::pll_save_post( $post_id, $post, $translations );

// Sticky posts
		if ( in_array( 'sticky_posts', $this->options['sync'] ) ) {
			$stickies = get_option( 'sticky_posts' );
			if ( isset( $_REQUEST['sticky'] ) && 'sticky' === $_REQUEST['sticky'] ) { // phpcs:ignore WordPress.Security.NonceVerification
				$stickies = array_merge( $stickies, array_values( $translations ) );
			} else {
				$stickies = array_diff( $stickies, array_values( $translations ) );
			}
			update_option( 'sticky_posts', array_unique( $stickies ) );
		}
	}

/**
	 * Some backward compatibility with Polylang < 2.3
	 * allows to call PLL()->sync->copy_post_metas() and PLL()->sync->copy_taxonomies()
	 * used for example in Polylang for WooCommerce
	 * the compatibility is however only partial as the 4th argument $sync is lost
	 *
	 * @since 2.3
	 *
	 * @throws BadMethodCallException If the method is not found.
	 *
	 * @param string $func Function name
	 * @param array  $args Function arguments
	 * @return mixed|void
	 */
	public function __call( $func, $args ) {
		$obj = substr( $func, 5 );

if ( is_object( $this->$obj ) && method_exists( $this->$obj, 'copy' ) ) {
			if ( WP_DEBUG ) {
				$debug = debug_backtrace( DEBUG_BACKTRACE_IGNORE_ARGS ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions
				$i = 1 + empty( $debug[1]['line'] ); // The file and line are in $debug[2] if the function was called using call_user_func

trigger_error( // phpcs:ignore WordPress.PHP.DevelopmentFunctions
					sprintf(
						'%1$s was called incorrectly in %3$s on line %4$s: the call to PLL()->sync->%1$s() has been deprecated in Polylang 2.3, use PLL()->sync->%2$s->copy() instead.' . "\nError handler",
						esc_html( $func ),
						esc_html( $obj ),
						esc_html( $debug[ $i ]['file'] ),
						absint( $debug[ $i ]['line'] )
					)
				);
			}
			return call_user_func_array( array( $this->$obj, 'copy' ), $args );
		}

$debug = debug_backtrace( DEBUG_BACKTRACE_IGNORE_ARGS ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions
		throw new BadMethodCallException(
			sprintf(
				'Call to undefined method PLL()->sync->%1$s() in %2$s on line %3$s' . "\nError handler",
				esc_html( $func ),
				esc_html( $debug[0]['file'] ),
				absint( $debug[0]['line'] )
			)
		);
	}
}

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