class ViewsSlideshowWidgetTypeBase

abstract class ViewsSlideshowWidgetTypeBase extends PluginBase implements ViewsSlideshowWidgetTypeInterface {
    use StringTranslationTrait;
    
    /**
     * {@inheritdoc}
     */
    public function __construct(array $configuration, $plugin_id, $plugin_definition) {
        parent::__construct($configuration, $plugin_id, $plugin_definition);
        $this->setConfiguration($configuration);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getTitle() {
        return $this->pluginDefinition['title'];
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
        // Add field to see if they would like to hide controls if there is only
        // one slide.
        $form['hide_on_single_slide'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Hide controls if there is only one slide'),
            '#default_value' => $this->getConfiguration()['hide_on_single_slide'],
            '#description' => $this->t('Should the controls be hidden if there is only one slide.'),
            '#states' => [
                'visible' => [
                    ':input[name="' . $this->getConfiguration()['dependency'] . '[enable]"]' => [
                        'checked' => TRUE,
                    ],
                ],
            ],
        ];
        return $form;
    }
    
    /**
     * {@inheritdoc}
     */
    public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function defaultConfiguration() {
        return [
            'enable' => [
                'default' => 0,
            ],
            'weight' => [
                'default' => 1,
            ],
            'hide_on_single_slide' => [
                'default' => 0,
            ],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function getConfiguration() {
        return [
            'id' => $this->getPluginId(),
        ] + $this->configuration;
    }
    
    /**
     * {@inheritdoc}
     */
    public function setConfiguration(array $configuration) {
        $this->configuration = $configuration + $this->defaultConfiguration();
        return $this;
    }
    
    /**
     * {@inheritdoc}
     */
    public function calculateDependencies() {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
    }
    
    /**
     * {@inheritdoc}
     */
    public function checkCompatiblity($slideshow) {
        $is_compatible = 1;
        // Check if every required accept value in the widget has a
        // corresponding calls value in the slideshow.
        foreach ($this->pluginDefinition['accepts'] as $accept_key => $accept_value) {
            if (is_array($accept_value) && !empty($accept_value['required']) && !in_array($accept_key, $slideshow['calls'])) {
                $is_compatible = 0;
                break;
            }
        }
        // No need to go through this if it's not compatible.
        if ($is_compatible) {
            // Check if every required calls value in the widget has a
            // corresponding accepts call.
            foreach ($this->pluginDefinition['calls'] as $calls_key => $calls_value) {
                if (is_array($calls_value) && !empty($calls_value['required']) && !in_array($calls_key, $slideshow['accepts'])) {
                    $is_compatible = 0;
                    break;
                }
            }
        }
        return $is_compatible;
    }

}