Add a dropdown for bbPress role to PMPro's Add a Member screen

pmpro-set-bbpress-role.php

<?php
/**
 * Adds dropdown for bbPress user role with Moderator and Participant as options
 */

add_action( 'pmpro_add_member_fields', 'add_bbpress_role_to_add_member' );
add_action( 'pmpro_add_member_added', 'pmpro_add_forum_role', 11 );
function add_bbpress_role_to_add_member( $profileuser ) {
	global $wp_roles;

	// Bail if current user cannot edit users
	if ( ! current_user_can( 'edit_user', $profileuser->ID ) ) {
		return;
	}

	// Get the roles
	$dynamic_roles = bbp_get_dynamic_roles();

	unset( $dynamic_roles[ bbp_get_keymaster_role() ] );
	unset( $dynamic_roles[ bbp_get_moderator_role() ] );
	unset( $dynamic_roles[ bbp_get_blocked_role() ] );
	?>
		<tr>
			<th><label for="bbp-forums-role"><?php esc_html_e( 'bbPress Forum Role', 'pmpro-bbpress' ); ?></label></th>
			<td>

				<?php $user_role = bbp_get_user_role( $profileuser->ID ); ?>

				<select name="bbp-forums-role" id="bbp-forums-role">

					<?php if ( ! empty( $user_role ) ) : ?>

						<option value=""><?php esc_html_e( '&mdash; No role for these forums &mdash;', 'pmpro-bbpress' ); ?></option>

					<?php else : ?>

						<option value="" selected="selected"><?php esc_html_e( '&mdash; No role for these forums &mdash;', 'pmpro-bbpress' ); ?></option>

					<?php endif; ?>

					<?php foreach ( $dynamic_roles as $role => $details ) : ?>

						<option <?php selected( $user_role, $role ); ?> value="<?php echo esc_attr( $role ); ?>"><?php echo bbp_translate_user_role( $details['name'] ); ?></option>

					<?php endforeach; ?>

				</select>
			</td>
		</tr>
	<?php
}

function pmpro_add_forum_role( $user_id ) {
	$user_role = 'subscriber';
	$bbp_role = 'bbp_participant';

	if ( is_wp_error( $user_id ) ) {
		echo $return->get_error_message();
	}

	if ( ! empty( $_POST['role'] ) ) {
		$user_role = $_POST['role'];
	}
	if ( ! empty( $_POST['bbp-forums-role'] ) ) {
		$bbp_role = $_POST['bbp-forums-role'];
	}
	// $capabilities_item[] = $bbp_role;
	$capabilities_array = array(
		$user_role       => true,
		$bbp_role        => true,
	);
	$updated_roles = update_user_meta( $user_id, 'wp_capabilities', $capabilities_array );
}

pmpro_add_member_added

add_action( 'pmpro_add_member_fields', 'add_bbpress_role_to_add_member' );
add_action( 'edit_user_profile_update', 'add_bbpress_role_to_add_member' );
function add_bbpress_role_to_add_member( $profileuser ) {
global $wp_roles;