class Shortcut

class Shortcut extends ContentEntityBase implements ShortcutInterface {
    
    /**
     * {@inheritdoc}
     */
    public function getTitle() {
        return $this->get('title')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setTitle($link_title) {
        $this->set('title', $link_title);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getWeight() {
        return $this->get('weight')->value;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setWeight($weight) {
        $this->set('weight', $weight);
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getUrl() {
        return $this->link
            ->first()
            ->getUrl();
    }
    
    /**
     * {@inheritdoc}
     */
    public function postSave(EntityStorageInterface $storage, $update = TRUE) {
        parent::postSave($storage, $update);
        // Entity::postSave() calls Entity::invalidateTagsOnSave(), which only
        // handles the regular cases. The Shortcut entity has one special case: a
        // newly created shortcut is *also* added to a shortcut set, so we must
        // invalidate the associated shortcut set's cache tag.
        if (!$update) {
            Cache::invalidateTags($this->getCacheTagsToInvalidate());
        }
    }
    
    /**
     * {@inheritdoc}
     */
    public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
        
        /** @var \Drupal\Core\Field\BaseFieldDefinition[] $fields */
        $fields = parent::baseFieldDefinitions($entity_type);
        $fields['id']->setDescription(t('The ID of the shortcut.'));
        $fields['uuid']->setDescription(t('The UUID of the shortcut.'));
        $fields['shortcut_set']->setLabel(t('Shortcut set'))
            ->setDescription(t('The bundle of the shortcut.'));
        $fields['langcode']->setDescription(t('The language code of the shortcut.'));
        $fields['title'] = BaseFieldDefinition::create('string')->setLabel(t('Name'))
            ->setDescription(t('The name of the shortcut.'))
            ->setRequired(TRUE)
            ->setTranslatable(TRUE)
            ->setSetting('max_length', 255)
            ->setDisplayOptions('form', [
            'type' => 'string_textfield',
            'weight' => -10,
            'settings' => [
                'size' => 40,
            ],
        ]);
        $fields['weight'] = BaseFieldDefinition::create('integer')->setLabel(t('Weight'))
            ->setDescription(t('Weight among shortcuts in the same shortcut set.'));
        $fields['link'] = BaseFieldDefinition::create('link')->setLabel(t('Path'))
            ->setDescription(t('The location this shortcut points to.'))
            ->setRequired(TRUE)
            ->setSettings([
            'link_type' => LinkItemInterface::LINK_INTERNAL,
            'title' => DRUPAL_DISABLED,
        ])
            ->setDisplayOptions('form', [
            'type' => 'link_default',
            'weight' => 0,
        ])
            ->setDisplayConfigurable('form', TRUE);
        return $fields;
    }
    
    /**
     * {@inheritdoc}
     */
    public function getCacheTagsToInvalidate() {
        return $this->shortcut_set->entity
            ->getCacheTags();
    }
    
    /**
     * Sort shortcut objects.
     *
     * Callback for uasort().
     *
     * @param \Drupal\shortcut\ShortcutInterface $a
     *   First item for comparison.
     * @param \Drupal\shortcut\ShortcutInterface $b
     *   Second item for comparison.
     *
     * @return int
     *   The comparison result for uasort().
     */
    public static function sort(ShortcutInterface $a, ShortcutInterface $b) {
        $a_weight = $a->getWeight();
        $b_weight = $b->getWeight();
        if ($a_weight == $b_weight) {
            return strnatcasecmp($a->getTitle(), $b->getTitle());
        }
        return $a_weight < $b_weight ? -1 : 1;
    }

}