Craft CMS: Adding behaviors by section, enforcing interfaces + traits

behaviors-Gear.php

<?php
namespace modules\appmodule\behaviors;

use Craft;
use craft\base\Element;
use craft\base\ElementInterface;
use craft\db\Table;
use craft\elements\db\ElementQuery;
use craft\elements\db\EntryQuery;
use craft\elements\Entry;
use craft\elements\User;
use craft\helpers\StringHelper;
use craft\helpers\UrlHelper;
use Tightenco\Collect\Support\Collection;
use verbb\supertable\elements\db\SuperTableBlockQuery;
use yii\base\Behavior;
use yii\helpers\Inflector;

class Gear extends Behavior implements ReviewableInterface
{
    use ReviewableTrait;
  
    public function getReviews(): EntryQuery
    {
        return Entry::find()
          ->section('reviews')
          ->relatedTo([
            'targetElement' => $this->owner,
            'field' => 'product',
          ]);
    }

    public function getReviewSubmissionUrl(): string
    {
        return UrlHelper::siteUrl('gear/new-review', ['product' => $this->owner->id]);
    }

    public function getReviewsUrl(): string
    {
        return UrlHelper::siteUrl(implode('/', [$this->owner->uri, 'reviews']));
    }
}

behaviors-ReviewableInterface.php

<?php
namespace modules\appmodule\behaviors;

use Craft;
use craft\elements\db\EntryQuery;

interface ReviewableInterface
{
    public function getReviews(): EntryQuery;
    public function getReviewCount(): int;
    public function getReviewAverage(): float;
    public function getReviewSubmissionUrl(): string;
    public function getReviewsUrl(): string;
}

behaviors-ReviewableTrait.php

<?php
namespace modules\appmodule\behaviors;

use Craft;
use Tightenco\Collect\Support\Collection;
use yii\base\Behavior;

trait ReviewableTrait
{
    public function getReviewCount(): int
    {
        return $this->owner->getReviews()->count();
    }

    public function getReviewAverage(): float
    {
        return round(Collection::make($this->owner->getReviews()->all())->map(function ($item) {
            return intval($item->reviewRating);
        })->avg(), 1);
    }
}

behaviors-Trip.php

<?php
namespace modules\appmodule\behaviors;

use Craft;
use craft\base\Element;
use craft\base\ElementInterface;
use craft\db\Table;
use craft\elements\db\EntryQuery;
use craft\elements\Entry;
use craft\elements\User;
use Tightenco\Collect\Support\Collection;
use yii\base\Behavior;

class Trip extends Behavior implements ReviewableInterface
{
    use ReviewableTrait;

    public function getReviewSubmissionUrl(): string
    {
        return UrlHelper::siteUrl('paddle/trips/new');
    }

    public function getReviewsUrl(): string
    {
        return UrlHelper::siteUrl(implode('/', [$this->owner->uri, 'reviews']));
    }

    public function getReviews(): EntryQuery
    {
        return Entry::find()
          ->section('tripReviews')
          ->relatedTo([
            'targetElement' => $this->owner,
            'field' => 'trip',
          ]);
    }
}

Module.php

<?php

namespace modules\appmodule;

use Craft;
use craft\elements\Entry;
use craft\events\DefineBehaviorsEvent;
use craft\events\ModelEvent;
use Tightenco\Collect\Support\Collection;
use yii\base\Event;

class Module extends \yii\base\Module
{
    const SECTION_BEHAVIORS = [
        'products' => [
            \modules\appmodule\behaviors\Gear::class,
        ],
        'trips' => [
            \modules\appmodule\behaviors\Trip::class
        ],
    ];

    public function init()
    {
        parent::init();

        // Yii requires an alias be set for controllerNamespace
        Craft::setAlias('@modules/appmodule', $this->getBasePath());
        $this->controllerNamespace = Craft::$app->getRequest()->getIsConsoleRequest()
            ? 'modules\appmodule\console\controllers'
            : 'modules\appmodule\controllers';

        $this->setComponents([
            'inflector' => \yii\helpers\Inflector::class,
            'string' => \craft\helpers\StringHelper::class,
        ]);

        Event::on(
            Entry::class,
            Entry::EVENT_DEFINE_BEHAVIORS,
            function (DefineBehaviorsEvent $event) {

                // Avoid exceptions for unpopulated entry…not 💯why this happens in CP
                // https://craftcms.stackexchange.com/questions/32992/conditionally-attach-behaviors-to-craft-elements-entry-by-section
                if (!$event->sender->id) {
                    return;
                }

                $event->behaviors = Collection::make(self::SECTION_BEHAVIORS)
                    ->filter(function ($behaviors, $sectionHandle) use ($event) {
                        return $event->sender->section->handle === $sectionHandle;
                    })
                    ->prepend($event->behaviors)
                    ->flatten()
                    ->all();
            }
        );
    }
}