--- /dev/null
+<?php
+
+namespace Drupal\content_translation;
+
+use Drupal\Core\Config\Entity\ThirdPartySettingsInterface;
+use Drupal\Core\Entity\ContentEntityInterface;
+use Drupal\Core\Entity\EntityManagerInterface;
+
+/**
+ * Provides field translation synchronization capabilities.
+ */
+class FieldTranslationSynchronizer implements FieldTranslationSynchronizerInterface {
+
+ /**
+ * The entity manager to use to load unchanged entities.
+ *
+ * @var \Drupal\Core\Entity\EntityManagerInterface
+ */
+ protected $entityManager;
+
+ /**
+ * Constructs a FieldTranslationSynchronizer object.
+ *
+ * @param \Drupal\Core\Entity\EntityManagerInterface $entityManager
+ * The entity manager.
+ */
+ public function __construct(EntityManagerInterface $entityManager) {
+ $this->entityManager = $entityManager;
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function synchronizeFields(ContentEntityInterface $entity, $sync_langcode, $original_langcode = NULL) {
+ $translations = $entity->getTranslationLanguages();
+ $field_type_manager = \Drupal::service('plugin.manager.field.field_type');
+
+ // If we have no information about what to sync to, if we are creating a new
+ // entity, if we have no translations for the current entity and we are not
+ // creating one, then there is nothing to synchronize.
+ if (empty($sync_langcode) || $entity->isNew() || count($translations) < 2) {
+ return;
+ }
+
+ // If the entity language is being changed there is nothing to synchronize.
+ $entity_type = $entity->getEntityTypeId();
+ $entity_unchanged = isset($entity->original) ? $entity->original : $this->entityManager->getStorage($entity_type)->loadUnchanged($entity->id());
+ if ($entity->getUntranslated()->language()->getId() != $entity_unchanged->getUntranslated()->language()->getId()) {
+ return;
+ }
+
+ /** @var \Drupal\Core\Field\FieldItemListInterface $items */
+ foreach ($entity as $field_name => $items) {
+ $field_definition = $items->getFieldDefinition();
+ $field_type_definition = $field_type_manager->getDefinition($field_definition->getType());
+ $column_groups = $field_type_definition['column_groups'];
+
+ // Sync if the field is translatable, not empty, and the synchronization
+ // setting is enabled.
+ if ($field_definition instanceof ThirdPartySettingsInterface && $field_definition->isTranslatable() && !$items->isEmpty() && $translation_sync = $field_definition->getThirdPartySetting('content_translation', 'translation_sync')) {
+ // Retrieve all the untranslatable column groups and merge them into
+ // single list.
+ $groups = array_keys(array_diff($translation_sync, array_filter($translation_sync)));
+
+ // If a group was selected has the require_all_groups_for_translation
+ // flag set, there are no untranslatable columns. This is done because
+ // the UI adds Javascript that disables the other checkboxes, so their
+ // values are not saved.
+ foreach (array_filter($translation_sync) as $group) {
+ if (!empty($column_groups[$group]['require_all_groups_for_translation'])) {
+ $groups = [];
+ break;
+ }
+ }
+ if (!empty($groups)) {
+ $columns = [];
+ foreach ($groups as $group) {
+ $info = $column_groups[$group];
+ // A missing 'columns' key indicates we have a single-column group.
+ $columns = array_merge($columns, isset($info['columns']) ? $info['columns'] : [$group]);
+ }
+ if (!empty($columns)) {
+ $values = [];
+ foreach ($translations as $langcode => $language) {
+ $values[$langcode] = $entity->getTranslation($langcode)->get($field_name)->getValue();
+ }
+
+ // If a translation is being created, the original values should be
+ // used as the unchanged items. In fact there are no unchanged items
+ // to check against.
+ $langcode = $original_langcode ?: $sync_langcode;
+ $unchanged_items = $entity_unchanged->getTranslation($langcode)->get($field_name)->getValue();
+ $this->synchronizeItems($values, $unchanged_items, $sync_langcode, array_keys($translations), $columns);
+
+ foreach ($translations as $langcode => $language) {
+ $entity->getTranslation($langcode)->get($field_name)->setValue($values[$langcode]);
+ }
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * {@inheritdoc}
+ */
+ public function synchronizeItems(array &$values, array $unchanged_items, $sync_langcode, array $translations, array $columns) {
+ $source_items = $values[$sync_langcode];
+
+ // Make sure we can detect any change in the source items.
+ $change_map = [];
+
+ // By picking the maximum size between updated and unchanged items, we make
+ // sure to process also removed items.
+ $total = max([count($source_items), count($unchanged_items)]);
+
+ // As a first step we build a map of the deltas corresponding to the column
+ // values to be synchronized. Recording both the old values and the new
+ // values will allow us to detect any change in the order of the new items
+ // for each column.
+ for ($delta = 0; $delta < $total; $delta++) {
+ foreach (['old' => $unchanged_items, 'new' => $source_items] as $key => $items) {
+ if ($item_id = $this->itemHash($items, $delta, $columns)) {
+ $change_map[$item_id][$key][] = $delta;
+ }
+ }
+ }
+
+ // Backup field values and the change map.
+ $original_field_values = $values;
+ $original_change_map = $change_map;
+
+ // Reset field values so that no spurious one is stored. Source values must
+ // be preserved in any case.
+ $values = [$sync_langcode => $source_items];
+
+ // Update field translations.
+ foreach ($translations as $langcode) {
+
+ // We need to synchronize only values different from the source ones.
+ if ($langcode != $sync_langcode) {
+ // Reinitialize the change map as it is emptied while processing each
+ // language.
+ $change_map = $original_change_map;
+
+ // By using the maximum cardinality we ensure to process removed items.
+ for ($delta = 0; $delta < $total; $delta++) {
+ // By inspecting the map we built before we can tell whether a value
+ // has been created or removed. A changed value will be interpreted as
+ // a new value, in fact it did not exist before.
+ $created = TRUE;
+ $removed = TRUE;
+ $old_delta = NULL;
+ $new_delta = NULL;
+
+ if ($item_id = $this->itemHash($source_items, $delta, $columns)) {
+ if (!empty($change_map[$item_id]['old'])) {
+ $old_delta = array_shift($change_map[$item_id]['old']);
+ }
+ if (!empty($change_map[$item_id]['new'])) {
+ $new_delta = array_shift($change_map[$item_id]['new']);
+ }
+ $created = $created && !isset($old_delta);
+ $removed = $removed && !isset($new_delta);
+ }
+
+ // If an item has been removed we do not store its translations.
+ if ($removed) {
+ continue;
+ }
+ // If a synchronized column has changed or has been created from
+ // scratch we need to replace the values for this language as a
+ // combination of the values that need to be synced from the source
+ // items and the other columns from the existing values. This only
+ // works if the delta exists in the language.
+ elseif ($created && !empty($original_field_values[$langcode][$delta])) {
+ $item_columns_to_sync = array_intersect_key($source_items[$delta], array_flip($columns));
+ $item_columns_to_keep = array_diff_key($original_field_values[$langcode][$delta], array_flip($columns));
+ $values[$langcode][$delta] = $item_columns_to_sync + $item_columns_to_keep;
+ }
+ // If the delta doesn't exist, copy from the source language.
+ elseif ($created) {
+ $values[$langcode][$delta] = $source_items[$delta];
+ }
+ // Otherwise the current item might have been reordered.
+ elseif (isset($old_delta) && isset($new_delta)) {
+ // If for any reason the old value is not defined for the current
+ // language we fall back to the new source value, this way we ensure
+ // the new values are at least propagated to all the translations.
+ // If the value has only been reordered we just move the old one in
+ // the new position.
+ $item = isset($original_field_values[$langcode][$old_delta]) ? $original_field_values[$langcode][$old_delta] : $source_items[$new_delta];
+ $values[$langcode][$new_delta] = $item;
+ }
+ }
+ }
+ }
+ }
+
+ /**
+ * Computes a hash code for the specified item.
+ *
+ * @param array $items
+ * An array of field items.
+ * @param int $delta
+ * The delta identifying the item to be processed.
+ * @param array $columns
+ * An array of column names to be synchronized.
+ *
+ * @returns string
+ * A hash code that can be used to identify the item.
+ */
+ protected function itemHash(array $items, $delta, array $columns) {
+ $values = [];
+
+ if (isset($items[$delta])) {
+ foreach ($columns as $column) {
+ if (!empty($items[$delta][$column])) {
+ $value = $items[$delta][$column];
+ // String and integer values are by far the most common item values,
+ // thus we special-case them to improve performance.
+ $values[] = is_string($value) || is_int($value) ? $value : hash('sha256', serialize($value));
+ }
+ else {
+ // Explicitly track also empty values.
+ $values[] = '';
+ }
+ }
+ }
+
+ return implode('.', $values);
+ }
+
+}
projects / yaffs-website / blobdiff