How to keep a CPT from being visible on the front end?

Question

Here's how I define the CPT:

$args = array(
        'labels' => $labels,
        'public' => FALSE,
        'show_ui' => TRUE,
        'capability_type' => SNG_CAP_SUPPORT,
        'hierarchical' => FALSE,
        'supports' => array(
            'title', 
            'editor'
        ),
        'menu_icon' => SNG_PLUGIN_URL . '/images/admin-support.png',
        'rewrite' => FALSE,
        'has_archive' => FALSE );
    register_post_type( SNG_SUPPORT_POSTTYPE, $args );

Basically when a user creates a post of this post_type there's a success message that says "view this post" which leads to the front end of my site mysite.com/?sng-support=test-8. I want to remove this message and link but I'm not looking for a CSS fix. There MUST be a way to make this work? I tried playing with the args and I can't seem to figure out what I'm doing wrong...

Essentially I don't want the posts to be accessible from the URL or the front end unless I specifically query for them.

I appreciate any help! :)

Answer 1

I think that at least part of what you want is to alter the submission update messages, probably in addition to @toscho's code.

function kill_message($messages) {
  global $post_type;
//   var_dump($messages); die;
  if ('your-cpt-slug' == $post_type) {
    // alter your message strings
  }
  return $messages;
}
add_filter( 'post_updated_messages', 'kill_message' );

If you var_dump the $messages variable it is pretty obvious what the messages represent. Just rewrite them however you want.

Answer 2

This is a known bug: #17609 'View post' link shown even when post type can't be viewed on the front-end.

To fix it, filter get_sample_permalink_html and test the post type properties:

add_filter( 'get_sample_permalink_html', function( $html, $post_id )
{
    $post_type = get_post_type( $post_id );
    $object    = get_post_type_object( $post_type );

    if ( $object->public && $object->publicly_queryable )
        return $html;

    add_filter( 'get_shortlink', function( $shortlink, $id ) use ( $post_id )
    {
        return $id == $post_id ? '' : $shortlink;
    }, 10, 2 );

    return '';

}, 10, 2 );