--- /dev/null
+<?php
+
+namespace Drupal\search_api_synonym\Import;
+
+use Drupal\Core\Config\ConfigFactoryInterface;
+use Drupal\Core\Plugin\ContainerFactoryPluginInterface;
+use Drupal\Core\Plugin\PluginBase;
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\file\Entity\File;
+use Symfony\Component\DependencyInjection\ContainerInterface;
+
+/**
+ * Base class for plugins handling import of search api synonyms.
+ *
+ * @ingroup plugin_api
+ */
+abstract class ImportPluginBase extends PluginBase implements ImportPluginInterface, ContainerFactoryPluginInterface {
+
+ /**
+ * Config factory service.
+ *
+ * @var \Drupal\Core\Config\ConfigFactoryInterface
+ */
+ protected $configFactory;
+
+ /**
+ * {@inheritdoc}
+ */
+ public function __construct(array $configuration, $plugin_id, array $plugin_definition, ConfigFactoryInterface $config_factory) {
+ parent::__construct($configuration, $plugin_id, $plugin_definition);
+ $this->configFactory = $config_factory;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function create(ContainerInterface $container, array $configuration, $plugin_id, $plugin_definition) {
+ return new static(
+ $configuration, $plugin_id, $plugin_definition, $container->get('config.factory')
+ );
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function parseFile(File $file, array $settings = []) {
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function allowedExtensions() {
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getConfiguration() {
+ return $this->configuration;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function setConfiguration(array $configuration) {
+ $this->configuration += $configuration;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function defaultConfiguration() {
+ return [];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+ $values = $form_state->getValues();
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function submitConfigurationForm(array &$form, FormStateInterface $form_state) {
+ parent::submitConfigurationForm($form, $form_state);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function calculateDependencies() {
+ return [];
+ }
+
+}