class ArgumentValidatorPluginBase

abstract class ArgumentValidatorPluginBase extends PluginBase {
    
    /**
     * The argument handler instance associated with this plugin.
     *
     * @var \Drupal\views\Plugin\views\argument\ArgumentPluginBase
     */
    protected $argument;
    
    /**
     * Sets the parent argument this plugin is associated with.
     *
     * @param \Drupal\views\Plugin\views\argument\ArgumentPluginBase $argument
     *   The parent argument to set.
     */
    public function setArgument(ArgumentPluginBase $argument) {
        $this->argument = $argument;
    }
    
    /**
     * Retrieves the options when this is a new access control plugin.
     */
    protected function defineOptions() {
        return [];
    }
    
    /**
     * Provides the default form for setting options.
     */
    public function buildOptionsForm(&$form, FormStateInterface $form_state) {
    }
    
    /**
     * Provides the default form for validating options.
     */
    public function validateOptionsForm(&$form, FormStateInterface $form_state) {
    }
    
    /**
     * Provides the default form for submitting options.
     */
    public function submitOptionsForm(&$form, FormStateInterface $form_state, &$options = []) {
    }
    
    /**
     * Determines if the administrator has the privileges to use this plugin.
     */
    public function access() {
        return TRUE;
    }
    
    /**
     * Blocks user input when the form is shown but we don´t have access.
     *
     * This is only called by child objects if specified in the buildOptionsForm(),
     * so it will not always be used.
     */
    protected function checkAccess(&$form, $option_name) {
        if (!$this->access()) {
            $form[$option_name]['#disabled'] = TRUE;
            $form[$option_name]['#value'] = $form[$this->option_name]['#default_value'];
            $form[$option_name]['#description'] .= ' <strong>' . $this->t('Note: you do not have permission to modify this. If you change the default filter type, this setting will be lost and you will NOT be able to get it back.') . '</strong>';
        }
    }
    
    /**
     * Performs validation for a given argument.
     */
    public function validateArgument($arg) {
        return TRUE;
    }
    
    /**
     * Processes the summary arguments for displaying.
     *
     * Some plugins alter the argument so it uses something else internally.
     * For example the user validation set's the argument to the uid,
     * for a faster query. But there are use cases where you want to use
     * the old value again, for example the summary.
     */
    public function processSummaryArguments(&$args) {
    }
    
    /**
     * Returns a context definition for this argument.
     *
     * @return \Drupal\Core\Plugin\Context\ContextDefinitionInterface|null
     *   A context definition that represents the argument or NULL if that is
     *   not possible.
     */
    public function getContextDefinition() {
    }

}