Only Allow post author and "Premium" Role user to comment

Question

Is there a way to make it so Everyone can see comments, But only the post author or those belonging to the Premium role can post a comment?

Could I do something like

        global $current_user;
        get_currentuserinfo();

        if (is_user_logged_in() && $current_user->ID == $post->post_author)  {  comment_form();  
    } else {
     if(  $current_user->roles[0] == 'admin' || $current_user->roles[0] == 'premium' )
{ comment_form(); } endif;

     else {
        echo '<h4>You are not allowed to post comments.</h4>';
    }

Sorry I should have said, there are two roles, basic and premium. Both can make posts. But Only premium can comment on anyones posts, and Basic can only comment on their own posts

Answer 1

Good news, bad news..

Good news The logic behind it is really simple. You basically wrap the form inside of a simple if statement.

    if(condition){ 
      /*Your form here*/
    } 
    else {echo '<h4>You need to be a premium account to post comments</h4>';}

Bad News You'll need to code in another user role. This can usually be done via a plugin. Most plugins offer documentation on how to check for a user's user-role.

So if the plugin has a function like

get_user_role();

You'd simply place that as your condition. That would look something like this:

  if(get_user_role() == 'premium'){ 
      /*Your form here*/
    } 
  else {echo '<h4>You need to be a premium account to post comments</h4>';}

Answer 2

In your comments.php template replace comment_form() with this:

if (current_user_can('manage_options') and current_user_can('Premium') {
   comment_form();   
}

Answer 3

Replace the comment_form() in comments.php file with this code:

$user = wp_get_current_user();
if(  $user->roles[0] == 'admin' || $user->roles[0] == 'premium' ){
    // show comment form
    comment_form();  
} else {
    echo '<h4>You are not allowed to post comments.</h4>';
}