bp_nouveau_ajax_button( $output = '',  $button = null,  $before = '',  $after = '',  $r = array() )

function bp_nouveau_ajax_button( $output = '', $button = null, $before = '', $after = '', $r = array() ) {
	if ( empty( $button->component ) ) {
		return $output;
	}

	// Custom data attribute.
	$r['button_attr']['data-bp-btn-action'] = $button->id;

	$reset_ids = array(
		'member_friendship' => true,
		'member_follow'     => true,
		'group_membership'  => true,
	);

	if ( ! empty( $reset_ids[ $button->id ] ) )  {
		$parse_class = array_map( 'sanitize_html_class', explode( ' ', $r['button_attr']['class'] ) );
		if ( false === $parse_class ) {
			return $output;
		}

		$find_id = array_intersect( $parse_class, array(
			'pending_friend',
			'is_friend',
			'not_friends',
			'leave-group',
			'join-group',
			'accept-invite',
			'membership-requested',
			'request-membership',
			'not_following',
			'following',
		) );

		if ( 1 !== count( $find_id ) ) {
			return $output;
		}

		$data_attribute = reset( $find_id );
		if ( 'pending_friend' === $data_attribute ) {
			$data_attribute = str_replace( '_friend', '', $data_attribute );
		} elseif ( 'group_membership' === $button->id ) {
			$data_attribute = str_replace( '-', '_', $data_attribute );
		}

		$r['button_attr']['data-bp-btn-action'] = $data_attribute;
	}

	// Re-render the button with our custom data attribute.
	$output = new BP_Core_HTML_Element( array(
		'element'    => $r['button_element'],
		'attr'       => $r['button_attr'],
		'inner_html' => ! empty( $r['link_text'] ) ? $r['link_text'] : ''
	) );
	$output = $output->contents();

	// Add span bp-screen-reader-text class
	return $before . $output . $after;
}