--- /dev/null
+<?php
+
+namespace Drupal\statistics;
+
+use Drupal\Core\Extension\ModuleHandlerInterface;
+use Drupal\Core\Form\ConfigFormBase;
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Form\FormStateInterface;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Configure statistics settings for this site.
+ */
+class StatisticsSettingsForm extends ConfigFormBase {
+
+ /**
+ * The module handler.
+ *
+ * @var \Drupal\Core\Extension\ModuleHandlerInterface
+ */
+ protected $moduleHandler;
+
+ /**
+ * Constructs a \Drupal\statistics\StatisticsSettingsForm object.
+ *
+ * @param \Drupal\Core\Config\ConfigFactoryInterface $config_factory
+ * The factory for configuration objects.
+ * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
+ * The module handler.
+ */
+ public function __construct(ConfigFactoryInterface $config_factory, ModuleHandlerInterface $module_handler) {
+ parent::__construct($config_factory);
+
+ $this->moduleHandler = $module_handler;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container) {
+ return new static(
+ $container->get('config.factory'),
+ $container->get('module_handler')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getFormId() {
+ return 'statistics_settings_form';
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ protected function getEditableConfigNames() {
+ return ['statistics.settings'];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildForm(array $form, FormStateInterface $form_state) {
+ $config = $this->config('statistics.settings');
+
+ // Content counter settings.
+ $form['content'] = [
+ '#type' => 'details',
+ '#title' => t('Content viewing counter settings'),
+ '#open' => TRUE,
+ ];
+ $form['content']['statistics_count_content_views'] = [
+ '#type' => 'checkbox',
+ '#title' => t('Count content views'),
+ '#default_value' => $config->get('count_content_views'),
+ '#description' => t('Increment a counter each time content is viewed.'),
+ ];
+
+ return parent::buildForm($form, $form_state);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitForm(array &$form, FormStateInterface $form_state) {
+ $this->config('statistics.settings')
+ ->set('count_content_views', $form_state->getValue('statistics_count_content_views'))
+ ->save();
+
+ // The popular statistics block is dependent on these settings, so clear the
+ // block plugin definitions cache.
+ if ($this->moduleHandler->moduleExists('block')) {
+ \Drupal::service('plugin.manager.block')->clearCachedDefinitions();
+ }
+
+ parent::submitForm($form, $form_state);
+ }
+
+}