--- /dev/null
+<?php
+
+namespace Drupal\block\Plugin\migrate\source\d6;
+
+use Drupal\block\Plugin\migrate\source\Block;
+use Drupal\migrate\Plugin\migrate\source\SourcePluginBase;
+use Drupal\migrate\Row;
+
+/**
+ * Gets i18n block data from source database.
+ *
+ * @MigrateSource(
+ * id = "d6_block_translation",
+ * source_module = "i18nblocks"
+ * )
+ */
+class BlockTranslation extends Block {
+
+ /**
+ * {@inheritdoc}
+ */
+ public function query() {
+ // Let the parent set the block table to use, but do not use the parent
+ // query. Instead build a query so can use an inner join to the selected
+ // block table.
+ parent::query();
+ $query = $this->select('i18n_blocks', 'i18n')
+ ->fields('i18n')
+ ->fields('b', ['bid', 'module', 'delta', 'theme', 'title']);
+ $query->innerJoin($this->blockTable, 'b', ('b.module = i18n.module AND b.delta = i18n.delta'));
+ return $query;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function fields() {
+ return [
+ 'bid' => $this->t('The block numeric identifier.'),
+ 'ibid' => $this->t('The i18n_blocks block numeric identifier.'),
+ 'module' => $this->t('The module providing the block.'),
+ 'delta' => $this->t("The block's delta."),
+ 'type' => $this->t('Block type'),
+ 'language' => $this->t('Language for this field.'),
+ 'theme' => $this->t('Which theme the block is placed in.'),
+ 'default_theme' => $this->t('The default theme.'),
+ 'title' => $this->t('Block title.'),
+ ];
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function prepareRow(Row $row) {
+ $row->setSourceProperty('default_theme', $this->defaultTheme);
+ return SourcePluginBase::prepareRow($row);
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function getIds() {
+ $ids = parent::getIds();
+ $ids['module']['alias'] = 'b';
+ $ids['delta']['alias'] = 'b';
+ $ids['theme']['alias'] = 'b';
+ $ids['language']['type'] = 'string';
+ return $ids;
+ }
+
+}