Hi,
I think hooking to wp_insert_post_data is too generic as it fires every time a post is added/updated.
The extension already have 2 filters that you can use to change the post data when saving: rwmb_frontend_update_post_data for updating posts and rwmb_frontend_insert_post_data for creating new posts. Previously it has only 1 params: the submitted post data. But I've just updated the extension, adding 2nd parameter: the shortcode params, so you can use to check whether you are on the right meta box.
This is sample code:
add_filter( 'rwmb_frontend_insert_post_data', 'your_function', 10, 2 );
add_filter( 'rwmb_frontend_update_post_data', 'your_function', 10, 2 );
function your_function( $data, $config ) {
if ( $config['id'] !== 'your_meta_box_id' ) {
return $data;
}
// Your code to get post_title
$data['post_title'] = ...;
return $data;
}
Please try it and let me know if you need anything. I can update the extension to make it works for you.
