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remap post-parent for already existing post (attachments) #167

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remap post-parent for already existing post (attachments) #167

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28 changes: 27 additions & 1 deletion class-wxr-importer.php
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Original file line number Diff line number Diff line change
Expand Up @@ -320,6 +320,7 @@ public function parse_authors( $file ) {
public function import( $file ) {
add_filter( 'import_post_meta_key', array( $this, 'is_valid_meta_key' ) );
add_filter( 'http_request_timeout', array( &$this, 'bump_request_timeout' ) );
add_action( 'wxr_importer.process_already_imported.post', array( &$this, 'parent_already_existing_attachments' ), 10, 2 );

$result = $this->import_start( $file );
if ( is_wp_error( $result ) ) {
Expand Down Expand Up @@ -714,6 +715,30 @@ protected function parse_post_node( $node ) {
return compact( 'data', 'meta', 'comments', 'terms' );
}

/**
* Fired by wxr_importer.process_already_imported.post
* Remap post_parent for attachment that already existing
* Without this, existing attachment (having lost their parent because of deletion/re-import (post-parent set to 0)
* would have their processing skipped during subsequent imports and never get their parent-id correctly updated anymore.
*
* This function expand what process_post() does by testing $parent_id + call to process_attachment() and process_post_meta()
*/
function parent_already_existing_attachments( $data, $post_exists ) {
$post_id = $post_exists;
$parent_id = isset( $data['post_parent'] ) ? (int) $data['post_parent'] : 0;
if ( $parent_id ) {
if ( isset( $this->mapping['post'][ $parent_id ] ) ) {
wp_update_post( ['ID' => $post_id, 'post_parent' => $this->mapping['post'][ $parent_id ] ] );
} else {
$post = get_post($post_id);
$this->process_post_meta( [ ['key' => '_wxr_import_parent', 'value' => $parent_id ] ], $post_id, $post );
wp_update_post( ['ID' => $post_id, 'post_parent' => 0 ] );
$this->requires_remapping['post'][ $post_id ] = true;
}
$this->mark_post_exists( $data, $post_id );
}
}

/**
* Create new posts based on import information
*
Expand Down Expand Up @@ -769,8 +794,9 @@ protected function process_post( $data, $meta, $comments, $terms ) {
* Post processing already imported.
*
* @param array $data Raw data imported for the post.
* @param int $post_exists Already existing post id
*/
do_action( 'wxr_importer.process_already_imported.post', $data );
do_action( 'wxr_importer.process_already_imported.post', $data, $post_exists );

// Even though this post already exists, new comments might need importing
$this->process_comments( $comments, $original_id, $data, $post_exists );
Expand Down