<?php
namespace Yoast\WP\Duplicate_Post;
/**
* Duplicate Post class to migrate revisions from the Rewrite & Republish copy to the original post.
*
* @since 4.0
*/
class Revisions_Migrator {
/**
* Adds hooks to integrate with the Post Republisher class.
*
* @return void
*/
public function register_hooks() {
\add_action( 'duplicate_post_after_rewriting', [ $this, 'migrate_revisions' ], 10, 2 );
}
/**
* Updates the revisions of the Rewrite & Republish copy to make them revisions of the original.
*
* It mimics the behaviour of wp_save_post_revision() in wp-includes/revision.php
* by deleting the revisions (except autosaves) exceeding the maximum allowed number.
*
* @param int $copy_id The copy's ID.
* @param int $original_id The post's ID.
*
* @return void
*/
public function migrate_revisions( $copy_id, $original_id ) {
$copy = \get_post( $copy_id );
$original_post = \get_post( $original_id );
if ( $copy === null || $original_post === null || ! \wp_revisions_enabled( $original_post ) ) {
return;
}
$copy_revisions = \wp_get_post_revisions( $copy );
foreach ( $copy_revisions as $revision ) {
$revision->post_parent = $original_post->ID;
$revision->post_name = "$original_post->ID-revision-v1";
\wp_update_post( $revision );
}
$revisions_to_keep = \wp_revisions_to_keep( $original_post );
if ( $revisions_to_keep < 0 ) {
return;
}
$revisions = \wp_get_post_revisions( $original_post, [ 'order' => 'ASC' ] );
$delete = ( \count( $revisions ) - $revisions_to_keep );
if ( $delete < 1 ) {
return;
}
$revisions = \array_slice( $revisions, 0, $delete );
for ( $i = 0; isset( $revisions[ $i ] ); $i++ ) {
if ( \strpos( $revisions[ $i ]->post_name, 'autosave' ) !== false ) {
continue;
}
\wp_delete_post_revision( $revisions[ $i ]->ID );
}
}
}