private static $instance = null;

private function __construct() {

add_filter( 'bp_xprofile_get_visibility_levels', array( $this, 'add_visibility_level' ) );

add_filter( 'bp_xprofile_get_hidden_field_types_for_user', array( $this, 'hidden_levels' ) );

add_filter( 'bp_before_has_profile_parse_args', array( $this, 'exclude_fields_on_register' ) );

}

public static function get_instance() {

if( is_null( self::$instance ) ) {

self::$instance = new self();

}

return self::$instance;

}

//this code will have side effects if the registration page is different than Bp or you are using Ajax registration plugin

public function add_visibility_level( $levels ) {

//sorry this is a hack, BuddyPress does not look for the field level VISIBILITY drop down from another list

//and we are not going to show this level to normal user to check

if( bp_is_register_page() || ( bp_is_user_profile_edit() && ! is_super_admin() ) ) {

return $levels;

}

$levels['admin-editable'] = array(

'id' => 'admin-editable',

'label' => __( 'Readonly' )

);

return $levels;

}

//hide these fields on the edit profile page

public function hidden_levels( $hidden_levels ) {

//bp does not care for visibility on registration page, so we will have to use other strategy for that

if( bp_is_user_profile_edit() && ! is_super_admin() ) {

//hide hidden fields

$hidden_levels[] = 'admin-editable';

}

return $hidden_levels;

}

//hide on edit/

public function exclude_fields_on_register( $args ) {

if( ! bp_is_register_page() && ! bp_is_user_profile_edit() ) {

return $args;

}

if( is_super_admin() ) {

return $args;

}

$exclude_fields = isset( $args['exclude_fields'] ) ? $args['exclude_fields']: array() ;

if( is_string( $exclude_fields ) ) {

$exclude_fields = explode( ',', $exclude_fields );//Bp does not mandate array, so could be a list by other plugin, play well with them

}

$hidden_fields = $this->get_hidden_field();

$all_exclude = array_merge( $exclude_fields, $hidden_fields );

$args['exclude_fields'] = join(',', $all_exclude );

return $args;

}

//utility

public function get_hidden_field() {

global $wpdb;

$table = buddypress()->profile->table_name_meta;

//there is a cacth

//figure it

//or ask in our forums :D

$query = $wpdb->prepare( "SELECT object_id FROM {$table} WHERE object_type = %s AND meta_key= %s and meta_value = %s", 'field', 'default_visibility', 'admin-editable');

return $wpdb->get_col( $query );

}