EntityChangedTrait.php

<?php

namespace Drupal\Core\Entity;


/**
 * Provides a trait for accessing changed time.
 */
trait EntityChangedTrait {
    
    /**
     * Returns the timestamp of the last entity change across all translations.
     *
     * @return int
     *   The timestamp of the last entity save operation across all
     *   translations.
     */
    public function getChangedTimeAcrossTranslations() {
        $changed = $this->getUntranslated()
            ->getChangedTime();
        foreach ($this->getTranslationLanguages(FALSE) as $language) {
            $translation_changed = $this->getTranslation($language->getId())
                ->getChangedTime();
            $changed = max($translation_changed, $changed);
        }
        return $changed;
    }
    
    /**
     * Gets the timestamp of the last entity change for the current translation.
     *
     * @return int|null
     *   The timestamp of the last entity save operation. Some entities allow a
     *   NULL value indicating the changed time is unknown.
     */
    public function getChangedTime() {
        $value = $this->get('changed')->value;
        return isset($value) ? (int) $value : NULL;
    }
    
    /**
     * Sets the timestamp of the last entity change for the current translation.
     *
     * @param int $timestamp
     *   The timestamp of the last entity save operation.
     *
     * @return $this
     */
    public function setChangedTime($timestamp) {
        $this->set('changed', $timestamp);
        return $this;
    }

}