Below are the rules for adding a post.

The rules are based on a combination of Frontier Post settings & Capabilities:

1. User has Capability: frontier_post_can_add
2. That it is an allowed post type (Setting: Allowed Post Types)
3. It is a valid post type

Code:

function frontier_can_add($tmp_post_type = "NONE")
  {
  global $fps_access_check_msg;
  $tmp_can_do = true;
  
  if ( !current_user_can( 'frontier_post_can_add' ) )
    {
    $tmp_can_do = false;
    $fps_access_check_msg .= __("You are not allowed to add new posts", "frontier-post")."<br>";
    }
  
  // Always allow the boss 
  if ( current_user_can( 'administrator' ) )
    {
    $tmp_can_do = true;
    $fps_access_check_msg = "";
    }
    
  
    
  // check if it is an allowed posttype
  if ( !fp_check_post_type($tmp_post_type) )
    {
    $tmp_can_do = false;
    $fps_access_check_msg .= __("You are not allowed to add new post type", "frontier-post").": ".$tmp_post_type;
    $fps_access_check_msg .= " - Allowed: (".implode(", ", fp_default_post_type_list()).")<br>";
    }
  
  // check if posttype exists
  if ( !post_type_exists($tmp_post_type) )
    {
    $tmp_can_do = false;
    $fps_access_check_msg .= __("Post type does not exists", "frontier-post").": ".$tmp_post_type."<br>";
    }
  
    return $tmp_can_do;
  
  }