Statamic breadcrumbs with taxonomy index pages excluded

HappyBreadcrumbsTags.php

<?php

namespace App\Tags;

use Statamic\Facades\Data;
use Statamic\Facades\Site;
use Statamic\Facades\URL;
use Statamic\Support\Str;
use Statamic\Tags\Tags;
use ReflectionClass;

class HappyBreadcrumbsTags extends Tags
{
    protected static $handle = 'happy_breadcrumbs';

    /**
     * This is essentially the same as {{ nav:breadcrumbs }}
     * but works with taxonomy terms as crumbs.
     *
     * https://github.com/statamic/cms/pull/3043
     *
     * We may be able to replace with the native statamic
     * tags once the above gets merged.
     *
     * @see \Statamic\Tags\Nav::breadcrumbs()
     */
    public function index()
    {
        $currentUrl = URL::makeAbsolute(URL::getCurrent());
        $url = Str::removeLeft($currentUrl, Site::current()->absoluteUrl());
        $url = Str::ensureLeft($url, '/');
        $segments = explode('/', $url);
        $segments[0] = '/';

        if (! $this->params->bool('include_home', true)) {
            array_shift($segments);
        }

        $crumbs = collect($segments)->map(function () use (&$segments) {
            $uri = URL::tidy(join('/', $segments));
            array_pop($segments);

            return $uri;
        })->mapWithKeys(function ($uri) {
            $uri = Str::ensureLeft($uri, '/');

            return [$uri => Data::findByUri($uri, Site::current()->handle())];
        })->filter();

        if (! $this->params->bool('reverse', false)) {
            $crumbs = $crumbs->reverse();
        }

        if ($this->params->bool('trim', true)) {
            $this->content = trim($this->content);
        }

        $crumbs = $crumbs->values()->map(function ($crumb) {
            $classname = (new ReflectionClass($crumb))->getShortName();
            if($classname === 'Taxonomy') {
                // The design doesn't currently call for these pages
                // to exist in the breadcrumb trail :confetti:
                return null;
            } else {
                $crumb->setSupplement('is_current', URL::getCurrent() === $crumb->url());
            }

            return $crumb;
        })->filter();

        $output = $this->parseLoop($crumbs->toAugmentedArray());

        if ($backspaces = $this->params->int('backspace', 0)) {
            $output = substr($output, 0, -$backspaces);
        }

        return $output;
    }
}