LearnDash: Bulk Enroll / Remove Users from Course from User List

functions.php

/*----
Add Bulk Enroll / Remove options for each LearnDash Course in User List 
---*/
function add_course_bulk_actions( $actions ) {
    $courses = get_posts( array(
        'post_type'      => 'sfwd-courses',
        'posts_per_page' => -1,
        'post_status'    => 'publish',
    ) );

    foreach ( $courses as $course ) {
        $course_id = $course->ID;
        $course_name = $course->post_title;

        $actions[ 'enroll_in_course-' . $course_id ] = 'Enroll in: ' . $course_name;
        $actions[ 'remove_from_course-' . $course_id ] = 'Remove from: ' . $course_name;
    }

    return $actions;
}
add_filter( 'bulk_actions-users', 'add_course_bulk_actions' );

function handle_bulk_actions_users( $redirect_to, $action, $user_ids ) {
    $action_parts = explode( '-', $action );
    if ( count( $action_parts ) === 2 && ( $action_parts[0] === 'enroll_in_course' || $action_parts[0] === 'remove_from_course' ) ) {
        $course_id = intval( $action_parts[1] );
        $success_count = 0;
        $error_count = 0;

        foreach ( $user_ids as $user_id ) {
            if ( $action_parts[0] === 'enroll_in_course' ) {
                $result = ld_update_course_access( $user_id, $course_id );
            } elseif ( $action_parts[0] === 'remove_from_course' ) {
                $result = ld_update_course_access( $user_id, $course_id, true );
            }

            if ( $result ) {
                $success_count++;
            } else {
                $error_count++;
            }
        }

        if ( $success_count > 0 ) {
            $success_message = sprintf( _n( 'Successfully processed %s user.', 'Successfully processed %s users.', $success_count ), $success_count );
            set_transient( 'course_action_success_message', $success_message, 5 );
        }

        if ( $error_count > 0 ) {
            $error_message = sprintf( _n( 'Failed to process %s user.', 'Failed to process %s users.', $error_count ), $error_count );
            set_transient( 'course_action_error_message', $error_message, 5 );
        }

        $redirect_to = add_query_arg( 'course_action_success', '1', $redirect_to );
    }

    return $redirect_to;
}
add_filter( 'handle_bulk_actions-users', 'handle_bulk_actions_users', 10, 3 );

function display_course_action_notices() {
    if ( $success_message = get_transient( 'course_action_success_message' ) ) {
        echo '<div class="notice notice-success is-dismissible"><p>' . $success_message . '</p></div>';
        delete_transient( 'course_action_success_message' );
    }

    if ( $error_message = get_transient( 'course_action_error_message' ) ) {
        echo '<div class="notice notice-error is-dismissible"><p>' . $error_message . '</p></div>';
        delete_transient( 'course_action_error_message' );
    }
}
add_action( 'admin_notices', 'display_course_action_notices' );