--- /dev/null
+<?php
+
+namespace Drupal\search_api_synonym\Plugin\search_api_synonym\import;
+
+use Drupal\Core\Form\FormStateInterface;
+use Drupal\file\Entity\File;
+use Drupal\Core\Link;
+use Drupal\Core\Url;
+use Drupal\search_api_synonym\Import\ImportPluginBase;
+use Drupal\search_api_synonym\Import\ImportPluginInterface;
+
+/**
+ * Import of Solr synonyms.txt files.
+ *
+ * @SearchApiSynonymImport(
+ * id = "solr",
+ * label = @Translation("Solr"),
+ * description = @Translation("Synonym import plugin from Solr synonyms.txt file.")
+ * )
+ */
+class Solr extends ImportPluginBase implements ImportPluginInterface {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function parseFile(File $file, array $settings = []) {
+ $data = [];
+
+ // Read file.
+ $rows = file($file->getFileUri());
+
+ if (is_array($rows)) {
+ foreach ($rows as $row) {
+ $row = trim($row);
+
+ // Skip comment lines
+ if (empty($row) || substr($row, 0, 1) == '#') {
+ continue;
+ }
+
+ $parts = explode('=>', $row);
+
+ // Spelling error.
+ if (count($parts) == 2) {
+ $data[] = [
+ 'word' => trim($parts[0]),
+ 'synonym' => trim($parts['1']),
+ 'type' => 'spelling_error'
+ ];
+ }
+ // Synonym.
+ else {
+ $data[] = [
+ 'word' => trim(substr($row, 0, strpos($row, ','))),
+ 'synonym' => trim(substr($row, strpos($row, ',') + 1)),
+ 'type' => 'synonym'
+ ];
+ }
+ }
+ }
+
+ return $data;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function buildConfigurationForm(array $form, FormStateInterface $form_state) {
+ $example_url = 'internal:' . base_path() . drupal_get_path('module', 'search_api_synonym') . '/examples/solr_synonyms.txt';
+ $form['template'] = [
+ '#type' => 'item',
+ '#title' => $this->t('Example'),
+ '#markup' => Link::fromTextAndUrl(t('Download example file'), Url::fromUri($example_url))->toString()
+ ];
+ return $form;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function validateConfigurationForm(array &$form, FormStateInterface $form_state) {
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function allowedExtensions() {
+ return ['txt'];
+ }
+
+}