View file src/addons/ThemeHouse/Reactions/Behavior/Reactable.php

<?php

namespace ThemeHouse\Reactions\Behavior;

use XF\Mvc\Entity\Behavior;

class Reactable extends Behavior
{
    protected function getDefaultConfig()
    {
        return [
            'stateField' => null
        ];
    }

    protected function verifyConfig()
    {
        if (!$this->contentType()) {
            throw new \LogicException("Structure must provide a contentType value");
        }

        if ($this->config['stateField'] === null) {
            throw new \LogicException("stateField config must be overridden; if no field is present, use an empty string");
        }
    }

    public function postSave()
    {
        if ($this->config['stateField']) {
            $visibilityChange = $this->entity->isStateChanged($this->config['stateField'], 'visible');

            if ($this->entity->isUpdate() && ($visibilityChange == 'enter' || $visibilityChange == 'leave')) {
                /** @var \ThemeHouse\Reactions\Repository\ReactedContent $reactRepo */
                $reactRepo = $this->repository('ThemeHouse\Reactions:ReactedContent');
                $reactRepo->recalculateReactIsCounted($this->contentType(), $this->id());
            }
        }
    }

    public function postDelete()
    {
        /** @var \ThemeHouse\Reactions\Repository\ReactedContent $reactRepo */
        $reactRepo = $this->repository('ThemeHouse\Reactions:ReactedContent');
        $reactRepo->fastDeleteReacts($this->contentType(), $this->id());
    }
}