--- /dev/null
+<?php
+
+namespace Drupal\search\Plugin;
+
+use Drupal\Component\Utility\NestedArray;
+use Drupal\Core\Form\FormStateInterface;
+
+/**
+ * Provides a base implementation for a configurable Search plugin.
+ */
+abstract class ConfigurableSearchPluginBase extends SearchPluginBase implements ConfigurableSearchPluginInterface {
+
+ /**
+ * The unique ID for the search page using this plugin.
+ *
+ * @var string
+ */
+ protected $searchPageId;
+
+ /**
+ * {@inheritdoc}
+ */
+ public function __construct(array $configuration, $plugin_id, $plugin_definition) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition);
+
+ $this->configuration = NestedArray::mergeDeep($this->defaultConfiguration(), $this->configuration);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function defaultConfiguration() {
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getConfiguration() {
+ return $this->configuration;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function setConfiguration(array $configuration) {
+ $this->configuration = $configuration;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function calculateDependencies() {
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function setSearchPageId($search_page_id) {
+ $this->searchPageId = $search_page_id;
+ return $this;
+ }
+
+}