Send email with custom fields after new draft is saved or new post published

Question

I have a custom post type immobile with some custom fields created with Toolset Types.

I need to send and email with the title and a custom field when a new immobile is saved as a draft or it's published.

I managed to do almost everthing. My code is like this:

add_action( 'auto-draft_to_draft', 'my_send_email', 99 );
add_action( 'auto-draft_to_publish', 'my_send_email', 99 );
add_action( 'draft_to_publish', 'my_send_email', 99 );
function my_send_email( $post ) {
  if ( $post->post_type == 'immobile' ) {
    wp_mail(
      'email@example.com',
      'New immobile saved as ' . $post->post_status,
      'Title: ' . $post->post_title . '. Ref: ' . get_post_meta( $post->ID, 'wpcf-reference', true ),
      array('Content-Type: text/html; charset=UTF-8')
    );
  }
}

Unfortunately my custom field is not showing in the email, probably because It get saved after the hook I'm using.

The perfect solution would be a hook wich:

1. Is fired after the post meta are saved
2. Allow me to check the post_status of the post before it was saved.

I tried the hook post updated but I got the same result: the custom field does not show up.

Which hook could I use? Or I should try a totally different approach?

Answer 1

I think you need to handle post request first. You have to do this because gutenberg calls the hook twice.

function transition_post_status_handler( $new_status, $old_status, $post ) {
    if ( defined( 'REST_REQUEST' ) && REST_REQUEST ) {
        send_mail_on_publish( $new_status, $old_status, $post );
        set_transient( 'post_status_updater_flag', 'done', 10 );
    } else {
        if ( false === get_transient( 'post_status_updater_flag' ) )
            send_mail_on_publish( $new_status, $old_status, $post );
    }
}
add_action( 'transition_post_status', 'transition_post_status_handler', 10, 3 );

Then you can call the function to send the email. At this point I think you have the data of the meta available.

function send_mail_on_publish( $new_status, $old_status, $post ) {

    if ( 'publish' == $new_status && 'immobile' == get_post_type($post) ) {

        // Check if not an autosave
        if ( wp_is_post_autosave( $post->ID ) )
            return;

        // Check if not a revision
        if ( wp_is_post_revision( $post->ID ) )
            return;

        // Send email

    }
}