();
$parent_id = $parent->ID;
$revisions = wp_get_post_revisions( $parent_id, array( 'check_enabled' => false ) );
foreach ( $revisions as $revision ) {
if ( false !== strpos( $revision->post_name, "{$parent_id}-autosave" ) ) {
$data = $this->prepare_item_for_response( $revision, $request );
$response[] = $this->prepare_response_for_collection( $data );
}
}
return rest_ensure_response( $response );
}
/**
* Retrieves the autosave's schema, conforming to JSON Schema.
*
* @since 5.0.0
*
* @return array Item schema data.
*/
public function get_item_schema() {
if ( $this->schema ) {
return $this->add_additional_fields_schema( $this->schema );
}
$schema = $this->revisions_controller->get_item_schema();
$schema['properties']['preview_link'] = array(
'description' => __( 'Preview link for the post.' ),
'type' => 'string',
'format' => 'uri',
'context' => array( 'edit' ),
'readonly' => true,
);
$this->schema = $schema;
return $this->add_additional_fields_schema( $this->schema );
}
/**
* Creates autosave for the specified post.
*
* From wp-admin/post.php.
*
* @since 5.0.0
*
* @param array $post_data Associative array containing the post data.
* @return mixed The autosave revision ID or WP_Error.
*/
public function create_post_autosave( $post_data ) {
$post_id = (int) $post_data['ID'];
$post = get_post( $post_id );
if ( is_wp_error( $post ) ) {
return $post;
}
$user_id = get_current_user_id();
// Store one autosave per author. If there is already an autosave, overwrite it.
$old_autosave = wp_get_post_autosave( $post_id, $user_id );
if ( $old_autosave ) {
$new_autosave = _wp_post_revision_data( $post_data, true );
$new_autosave['ID'] = $old_autosave->ID;
$new_autosave['post_author'] = $user_id;
// If the new autosave has the same content as the post, delete the autosave.
$autosave_is_different = false;
foreach ( array_intersect( array_keys( $new_autosave ), array_keys( _wp_post_revision_fields( $post ) ) ) as $field ) {
if ( normalize_whitespace( $new_autosave[ $field ] ) !== normalize_whitespace( $post->$field ) ) {
$autosave_is_different = true;
break;
}
}
if ( ! $autosave_is_different ) {
wp_delete_post_revision( $old_autosave->ID );
return new WP_Error(
'rest_autosave_no_changes',
__( 'There is nothing to save. The autosave and the post content are the same.' ),
array( 'status' => 400 )
);
}
/** This filter is documented in wp-admin/post.php */
do_action( 'wp_creating_autosave', $new_autosave );
// wp_update_post() expects escaped array.
return wp_update_post( wp_slash( $new_autosave ) );
}
// Create the new autosave as a special post revision.
return _wp_put_post_revision( $post_data, true );
}
/**
* Prepares the revision for the REST response.
*
* @since 5.0.0
* @since 5.9.0 Renamed `$post` to `$item` to match parent class for PHP 8 named parameter support.
*
* @param WP_Post $item Post revision object.
* @param WP_REST_Request $request Request object.
* @return WP_REST_Response Response object.
*/
public function prepare_item_for_response( $item, $request ) {
// Restores the more descriptive, specific name for use within this method.
$post = $item;
$response = $this->revisions_controller->prepare_item_for_response( $post, $request );
$fields = $this->get_fields_for_response( $request );
if ( in_array( 'preview_link', $fields, true ) ) {
$parent_id = wp_is_post_autosave( $post );
$preview_post_id = false === $parent_id ? $post->ID : $parent_id;
$preview_query_args = array();
if ( false !== $parent_id ) {
$preview_query_args['preview_id'] = $parent_id;
$preview_query_args['preview_nonce'] = wp_create_nonce( 'post_preview_' . $parent_id );
}
$response->data['preview_link'] = get_preview_post_link( $preview_post_id, $preview_query_args );
}
$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
$response->data = $this->add_additional_fields_to_object( $response->data, $request );
$response->data = $this->filter_response_by_context( $response->data, $context );
/**
* Filters a revision returned from the REST API.
*
* Allows modification of the revision right before it is returned.
*
* @since 5.0.0
*
* @param WP_REST_Response $response The response object.
* @param WP_Post $post The original revision object.
* @param WP_REST_Request $request Request used to generate the response.
*/
return apply_filters( 'rest_prepare_autosave', $response, $post, $request );
}
/**
* Retrieves the query params for the autosaves collection.
*
* @since 5.0.0
*
* @return array Collection parameters.
*/
public function get_collection_params() {
return array(
'context' => $this->get_context_param( array( 'default' => 'view' ) ),
);
}
}
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