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Editing: class.jetpack-sync-module-posts.php

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<?php

require_once dirname( __FILE__ ) . '/class.jetpack-sync-settings.php';

class Jetpack_Sync_Module_Posts extends Jetpack_Sync_Module {

private $just_published = array();
	private $just_trashed = array();
	private $action_handler;
	private $import_end = false;

public function name() {
		return 'posts';
	}

public function get_object_by_id( $object_type, $id ) {
		if ( $object_type === 'post' && $post = get_post( intval( $id ) ) ) {
			return $this->filter_post_content_and_add_links( $post );
		}

return false;
	}

public function set_defaults() {
		$this->import_end = false;
	}

public function init_listeners( $callable ) {
		$this->action_handler = $callable;

// Core < 4.7 doesn't deal with nested wp_insert_post calls very well
		global $wp_version;
		$priority = version_compare( $wp_version, '4.7-alpha', '<' ) ? 0 : 11;

add_action( 'wp_insert_post', array( $this, 'wp_insert_post' ), $priority, 3 );

add_action( 'deleted_post', $callable, 10 );
		add_action( 'jetpack_published_post', $callable, 10, 2 );
		add_action( 'jetpack_trashed_post', $callable, 10, 2 );

add_action( 'transition_post_status', array( $this, 'save_published' ), 10, 3 );
		add_filter( 'jetpack_sync_before_enqueue_wp_insert_post', array( $this, 'filter_blacklisted_post_types' ) );

// listen for meta changes
		$this->init_listeners_for_meta_type( 'post', $callable );
		$this->init_meta_whitelist_handler( 'post', array( $this, 'filter_meta' ) );

add_action( 'export_wp', $callable );
		add_action( 'jetpack_sync_import_end', $callable, 10, 2 );

// Movable type, RSS, Livejournal
		add_action( 'import_done', array( $this, 'sync_import_done' ) );

// WordPress, Blogger, Livejournal, woo tax rate
		add_action( 'import_end', array( $this, 'sync_import_end' ) );
	}

public function sync_import_done( $importer ) {
		// We already ran an send the import
		if ( $this->import_end ) {
			return;
		}

$importer_name = $this->get_importer_name( $importer );

/**
		 * Sync Event that tells that the import is finished
		 *
		 * @since 5.0.0
		 *
		 * $param string $importer
		 */
		do_action( 'jetpack_sync_import_end', $importer, $importer_name );
		$this->import_end = true;
	}

public function sync_import_end() {
		// We already ran an send the import
		if ( $this->import_end ) {
			return;
		}

$this->import_end = true;
		$importer         = 'unknown';
		$backtrace        = wp_debug_backtrace_summary( null, 0, false );
		if ( $this->is_importer( $backtrace, 'Blogger_Importer' ) ) {
			$importer = 'blogger';
		}

if ( 'unknown' === $importer && $this->is_importer( $backtrace, 'WC_Tax_Rate_Importer' ) ) {
			$importer = 'woo-tax-rate';
		}

if ( 'unknown' === $importer && $this->is_importer( $backtrace, 'WP_Import' ) ) {
			$importer = 'wordpress';
		}

$importer_name = $this->get_importer_name( $importer );

/** This filter is already documented in sync/class.jetpack-sync-module-posts.php */
		do_action( 'jetpack_sync_import_end', $importer, $importer_name );
	}

private function get_importer_name( $importer ) {
		$importers = get_importers();
		return isset( $importers[ $importer ] ) ? $importers[ $importer ][0] : 'Unknown Importer';
	}

private function is_importer( $backtrace, $class_name ) {
		foreach ( $backtrace as $trace ) {
			if ( strpos( $trace, $class_name ) !== false ) {
				return true;
			}
		}

return false;
	}

public function init_full_sync_listeners( $callable ) {
		add_action( 'jetpack_full_sync_posts', $callable ); // also sends post meta
	}

public function init_before_send() {
		add_filter( 'jetpack_sync_before_send_wp_insert_post', array( $this, 'expand_wp_insert_post' ) );

// full sync
		add_filter( 'jetpack_sync_before_send_jetpack_full_sync_posts', array( $this, 'expand_post_ids' ) );
	}

public function enqueue_full_sync_actions( $config, $max_items_to_enqueue, $state ) {
		global $wpdb;

return $this->enqueue_all_ids_as_action( 'jetpack_full_sync_posts', $wpdb->posts, 'ID', $this->get_where_sql( $config ), $max_items_to_enqueue, $state );
	}

public function estimate_full_sync_actions( $config ) {
		global $wpdb;

$query = "SELECT count(*) FROM $wpdb->posts WHERE " . $this->get_where_sql( $config );
		$count = $wpdb->get_var( $query );

return (int) ceil( $count / self::ARRAY_CHUNK_SIZE );
	}

private function get_where_sql( $config ) {
		$where_sql = Jetpack_Sync_Settings::get_blacklisted_post_types_sql();

// config is a list of post IDs to sync
		if ( is_array( $config ) ) {
			$where_sql .= ' AND ID IN (' . implode( ',', array_map( 'intval', $config ) ) . ')';
		}

return $where_sql;
	}

function get_full_sync_actions() {
		return array( 'jetpack_full_sync_posts' );
	}

/**
	 * Process content before send
	 *
	 * @param array $args wp_insert_post arguments
	 *
	 * @return array
	 */
	function expand_wp_insert_post( $args ) {
		$post_id      = $args[0];
		$post         = $args[1];
		$update       = $args[2];
		$is_auto_save = isset( $args[3] ) ? $args[3] : false; //See https://github.com/Automattic/jetpack/issues/7372
		$just_published = isset( $args[4] ) ? $args[4] : false; //Preventative in light of above issue

return array( $post_id, $this->filter_post_content_and_add_links( $post ), $update, $is_auto_save, $just_published );
	}

function filter_blacklisted_post_types( $args ) {
		$post = $args[1];

if ( in_array( $post->post_type, Jetpack_Sync_Settings::get_setting( 'post_types_blacklist' ) ) ) {
			return false;
		}

return $args;
	}

// Meta
	function filter_meta( $args ) {
		if ( $this->is_post_type_allowed( $args[1] ) && $this->is_whitelisted_post_meta( $args[2] ) ) {
			return $args;
		}

return false;
	}

function is_whitelisted_post_meta( $meta_key ) {
		// _wpas_skip_ is used by publicize
		return in_array( $meta_key, Jetpack_Sync_Settings::get_setting( 'post_meta_whitelist' ) ) || wp_startswith( $meta_key, '_wpas_skip_' );
	}

function is_post_type_allowed( $post_id ) {
		$post = get_post( $post_id );

return ! in_array( $post->post_type, Jetpack_Sync_Settings::get_setting( 'post_types_blacklist' ) );
	}

function remove_embed() {
		global $wp_embed;
		remove_filter( 'the_content', array( $wp_embed, 'run_shortcode' ), 8 );
		// remove the embed shortcode since we would do the part later.
		remove_shortcode( 'embed' );
		// Attempts to embed all URLs in a post
		remove_filter( 'the_content', array( $wp_embed, 'autoembed' ), 8 );
	}

function add_embed() {
		global $wp_embed;
		add_filter( 'the_content', array( $wp_embed, 'run_shortcode' ), 8 );
		// Shortcode placeholder for strip_shortcodes()
		add_shortcode( 'embed', '__return_false' );
		// Attempts to embed all URLs in a post
		add_filter( 'the_content', array( $wp_embed, 'autoembed' ), 8 );
	}

// Expands wp_insert_post to include filtered content
	function filter_post_content_and_add_links( $post_object ) {
		global $post;
		$post = $post_object;

// return non existant post 
		$post_type = get_post_type_object( $post->post_type );
		if ( empty( $post_type ) || ! is_object( $post_type ) ) {
			$non_existant_post                    = new stdClass();
			$non_existant_post->ID                = $post->ID;
			$non_existant_post->post_modified     = $post->post_modified;
			$non_existant_post->post_modified_gmt = $post->post_modified_gmt;
			$non_existant_post->post_status       = 'jetpack_sync_non_registered_post_type';

return $non_existant_post;
		}
		/**
		 * Filters whether to prevent sending post data to .com
		 *
		 * Passing true to the filter will prevent the post data from being sent
		 * to the WordPress.com.
		 * Instead we pass data that will still enable us to do a checksum against the
		 * Jetpacks data but will prevent us from displaying the data on in the API as well as
		 * other services.
		 * @since 4.2.0
		 *
		 * @param boolean false prevent post data from being synced to WordPress.com
		 * @param mixed $post WP_POST object
		 */
		if ( apply_filters( 'jetpack_sync_prevent_sending_post_data', false, $post ) ) {
			// We only send the bare necessary object to be able to create a checksum.
			$blocked_post                    = new stdClass();
			$blocked_post->ID                = $post->ID;
			$blocked_post->post_modified     = $post->post_modified;
			$blocked_post->post_modified_gmt = $post->post_modified_gmt;
			$blocked_post->post_status       = 'jetpack_sync_blocked';

return $blocked_post;
		}

// lets not do oembed just yet.
		$this->remove_embed();

if ( 0 < strlen( $post->post_password ) ) {
			$post->post_password = 'auto-' . wp_generate_password( 10, false );
		}

/** This filter is already documented in core. wp-includes/post-template.php */
		if ( Jetpack_Sync_Settings::get_setting( 'render_filtered_content' ) && $post_type->public ) {
			global $shortcode_tags;
			/**
			 * Filter prevents some shortcodes from expanding.
			 *
			 * Since we can can expand some type of shortcode better on the .com side and make the
			 * expansion more relevant to contexts. For example [galleries] and subscription emails
			 *
			 * @since 4.5.0
			 *
			 * @param array of shortcode tags to remove.
			 */
			$shortcodes_to_remove        = apply_filters( 'jetpack_sync_do_not_expand_shortcodes', array(
				'gallery',
				'slideshow'
			) );
			$removed_shortcode_callbacks = array();
			foreach ( $shortcodes_to_remove as $shortcode ) {
				if ( isset ( $shortcode_tags[ $shortcode ] ) ) {
					$removed_shortcode_callbacks[ $shortcode ] = $shortcode_tags[ $shortcode ];
				}
			}

array_map( 'remove_shortcode', array_keys( $removed_shortcode_callbacks ) );

$post->post_content_filtered = apply_filters( 'the_content', $post->post_content );
			$post->post_excerpt_filtered = apply_filters( 'the_excerpt', $post->post_excerpt );

foreach ( $removed_shortcode_callbacks as $shortcode => $callback ) {
				add_shortcode( $shortcode, $callback );
			}
		}

$this->add_embed();

if ( has_post_thumbnail( $post->ID ) ) {
			$image_attributes = wp_get_attachment_image_src( get_post_thumbnail_id( $post->ID ), 'full' );
			if ( is_array( $image_attributes ) && isset( $image_attributes[0] ) ) {
				$post->featured_image = $image_attributes[0];
			}
		}

$post->permalink = get_permalink( $post->ID );
		$post->shortlink = wp_get_shortlink( $post->ID );

return $post;
	}

public function save_published( $new_status, $old_status, $post ) {
		if ( 'publish' === $new_status && 'publish' !== $old_status ) {
			$this->just_published[] = $post->ID;
		}

if ( 'trash' === $new_status && 'trash' !== $old_status ) {
			$this->just_trashed[] = $post->ID;
		}
	}

public function wp_insert_post( $post_ID, $post = null, $update = null ) {
		if ( ! is_numeric( $post_ID ) || is_null( $post ) ) {
			return;
		}

if ( Jetpack_Constants::get_constant( 'DOING_AUTOSAVE' ) ) {
			$is_auto_save = true;
		} else {
			$is_auto_save = false;
		}

if ( ! in_array( $post_ID, $this->just_published ) ) {
			$just_published = false;
		} else {
			$just_published = true;
		}

call_user_func( $this->action_handler, $post_ID, $post, $update, $is_auto_save, $just_published );
		$this->send_published( $post_ID, $post );
		$this->send_trashed( $post_ID, $post );
	}

public function send_published( $post_ID, $post ) {
		if ( ! in_array( $post_ID, $this->just_published ) ) {
			return;
		}

// Post revisions cause race conditions where this send_published add the action before the actual post gets synced
		if ( wp_is_post_autosave( $post ) || wp_is_post_revision( $post ) ) {
			return;
		}

$post_flags = array(
			'post_type' => $post->post_type
		);

$author_user_object = get_user_by( 'id', $post->post_author );
		if ( $author_user_object ) {
			$post_flags['author'] = array(
				'id'              => $post->post_author,
				'wpcom_user_id'   => get_user_meta( $post->post_author, 'wpcom_user_id', true ),
				'display_name'    => $author_user_object->display_name,
				'email'           => $author_user_object->user_email,
				'translated_role' => Jetpack::translate_user_to_role( $author_user_object ),
			);
		}

/**
		 * Filter that is used to add to the post flags ( meta data ) when a post gets published
		 *
		 * @since 4.4.0
		 *
		 * @param mixed array post flags that are added to the post
		 * @param mixed $post WP_POST object
		 */
		$flags = apply_filters( 'jetpack_published_post_flags', $post_flags, $post );

/**
		 * Action that gets synced when a post type gets published.
		 *
		 * @since 4.4.0
		 *
		 * @param int $post_ID
		 * @param mixed array $flags post flags that are added to the post
		 */
		do_action( 'jetpack_published_post', $post_ID, $flags );
		$this->just_published = array_diff( $this->just_published, array( $post_ID ) );
	}

public function send_trashed( $post_ID, $post ) {
		if ( ! in_array( $post_ID, $this->just_trashed ) ) {
			return;
		}

/**
		 * Action that gets synced when a post type gets trashed.
		 *
		 * @since 4.9.0
		 *
		 * @param int $post_ID
		 */
		do_action( 'jetpack_trashed_post', $post_ID, $post->post_type );

$this->just_trashed = array_diff( $this->just_trashed, array( $post_ID ) );
	}

public function expand_post_ids( $args ) {
		$post_ids = $args[0];

$posts = array_filter( array_map( array( 'WP_Post', 'get_instance' ), $post_ids ) );
		$posts = array_map( array( $this, 'filter_post_content_and_add_links' ), $posts );
		$posts = array_values( $posts ); // reindex in case posts were deleted

return array(
			$posts,
			$this->get_metadata( $post_ids, 'post', Jetpack_Sync_Settings::get_setting( 'post_meta_whitelist' ) ),
			$this->get_term_relationships( $post_ids ),
		);
	}
}

Editing: class.jetpack-sync-module-posts.php

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