Payment before publishing post

Question

I want my user pay before every post publishing. I searched for some hooks that triggers before a post publishes, but all these hooks run after a post is successfully published and i don't want this. pre_post_update, publish_post, save_post and wp_insert_post are the available hooks. If there is not an action that runs before publishing post, how can i prevent publishing post is user don't pay when he wants to publish the post ?

Edit: Now i'm using this code for checking if a post is publishing, but this function is not working, i'm using this function in a custom plugin.

function af_check_payment( $new_status, $old_status, $post ) {
    if ( $new_status == 'publish' && $old_status != 'publish' && $post->post_type == 'barbershop' ) {
        wp_transition_post_status( 'pending', $old_status, $post );
        echo 'At least i know its publishing';
    }
}

add_action( 'transition_post_status', 'af_check_payment', 10, 3 );

This function does not echo or change any post status.

Answer 1

Use below code

add_action('transition_post_status', 'send_new_post', 10, 3);

// Listen for publishing of a new post
function send_new_post($new_status, $old_status, $post) {

  if('publish' === $new_status && 'publish' !== $old_status && $post->post_type === 'post') {
    // Do something!
  }

}

Answer 2

The easiest way is to check all the conditions and pay before using the hook for adding posts. Currently there is no hook to help you create post after payment.