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<?php
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/**
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* @file
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* Internationalization (i18n) package. Synchronization of translations
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*
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* Node synchronization.
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*/
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/**
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* Synchronizes fields for node translation.
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*
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* There's some specific handling for known fields like:
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* - files, for file attachments.
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* - iid (CCK node attachments, translations for them will be handled too).
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*
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* All the rest of the fields will be just copied over.
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* The 'revision' field will have the special effect of creating a revision too for the translation.
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*
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* @param $node
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* Source node being edited.
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* @param $translations
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* Node translations to synchronize, just needs nid property.
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* @param $fields
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* List of fields to synchronize.
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* @param $op
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* Node operation (insert|update).
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*/
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function i18n_sync_node_translation($node, $translations, $field_names, $op) {
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$total = count($translations);
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$count = 0;
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// Disable language selection and synchronization temporarily, enable it again later
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$i18n_select = i18n_select(FALSE);
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i18n_sync(FALSE);
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foreach ($translations as $translation) {
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// If translation is the same node, we cannot synchronize with itself
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if ($node->nid == $translation->nid) {
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$total--;
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continue;
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}
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// Load full node, we need all data here.
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entity_get_controller('node')->resetCache(array($translation->nid));
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$translation = node_load($translation->nid);
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$i18n_options = i18n_sync_node_options($node->type);
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// Invoke callback for each field, the default is just copy over
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foreach ($field_names as $field) {
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if (!empty($i18n_options[$field]['field_name'])) {
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i18n_sync_field_translation_sync('node', $node->type, $translation, $translation->language, $node, $node->language, $i18n_options[$field]['field_name']);
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}
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elseif (isset($node->$field)) {
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// Standard node field, just copy over.
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$translation->$field = $node->$field;
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}
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}
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// Give a chance to other modules for additional sync
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module_invoke_all('i18n_sync_translation', 'node', $translation, $translation->language, $node, $node->language, $field_names);
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node_save($translation);
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$count++;
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// Flush each entity from the load cache after processing, to
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// avoid exceeding PHP memory limits. It should be safe to keep
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// at least one, however; so we retain the final translation in
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// the cache after saving it.
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if ($count < $total) {
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entity_get_controller('node')->resetCache(array($translation->nid));
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}
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}
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i18n_sync(TRUE);
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i18n_select($i18n_select);
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drupal_set_message(format_plural($count, 'One node translation has been synchronized.', 'All @count node translations have been synchronized.'));
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}
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/**
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* Node attachments (CCK) that may have translation.
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*/
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function i18n_sync_node_translation_attached_node(&$node, &$translation, $field) {
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if ($attached = node_load($node->$field)) {
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$translation->$field = i18n_sync_node_translation_reference_field($attached, $node->$field, $translation->language);
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}
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}
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/**
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* Translating a nodereference field (cck).
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*/
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function i18n_sync_node_translation_nodereference_field(&$node, &$translation, $field) {
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$translated_references = array();
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foreach ($node->$field as $reference) {
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if ($reference_node = node_load($reference['nid'])) {
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$translated_references[] = array(
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'nid' => i18n_sync_node_translation_reference_field($reference_node, $reference['nid'], $translation->language)
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);
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}
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}
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$translation->$field = $translated_references;
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}
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/**
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* Helper function to which translates reference field. We try to use translations for reference, otherwise fallback.
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* Example:
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* English A references English B and English C.
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* English A and B are translated to German A and B, but English C is not.
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* The syncronization from English A to German A would it German B and English C.
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*/
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function i18n_sync_node_translation_reference_field(&$reference_node, $default_value, $langcode) {
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if (isset($reference_node->tnid) && translation_supported_type($reference_node->type)) {
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// This content type has translations, find the one.
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if (($reference_trans = translation_node_get_translations($reference_node->tnid)) && isset($reference_trans[$langcode])) {
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return $reference_trans[$langcode]->nid;
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}
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else {
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// No requested language found, just copy the field.
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return $default_value;
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}
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}
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else {
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// Content type without language, just copy the field.
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return $default_value;
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}
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}
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/**
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* Synchronize configurable field
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*
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* @param $field_info
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* Field API field information.
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*/
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function i18n_sync_node_translation_default_field($node, $translation, $field, $field_info) {
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switch ($field_info['field']['type']) {
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case 'file':
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case 'image':
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i18n_sync_node_translation_file_field($node, $translation, $field);
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break;
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default:
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// For fields that don't need special handling, just copy it over if defined.
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// Field languages are completely unconsistent, for not to say broken
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// both in Drupal core and entity translation. Let's hope this works.
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$source_lang = field_language('node', $node, $field);
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$translation_lang = field_language('node', $translation, $field);
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if (isset($node->{$field}[$source_lang])) {
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$translation->{$field}[$translation_lang] = $node->{$field}[$source_lang];
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}
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break;
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}
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}
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/**
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* Sync a file or image field:
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* - file-id's (fid) are synced
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* - order of fid's is synced
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* - description, alt, title is kept if already existing, copied otherwise
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*
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* @param object $node the node whose changes are to be synced
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* @param object $translation a node to which the changes need to be synced
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* @param string $field field name
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*/
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function i18n_sync_node_translation_file_field($node, $translation, $field) {
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if (isset($node->{$field}[$node->language])) {
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// Build a copy of the existing files in the translation node
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// indexed by fid for easy retrieval in the copy loop below
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$existing_files = array();
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if (isset($translation->{$field}[$translation->language])) {
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foreach ($translation->{$field}[$translation->language] as $delta => $file) {
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$existing_files[$file['fid']] = $file;
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}
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}
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// Start creating the translated copy
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$translated_files = $node->{$field}[$node->language];
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foreach ($translated_files as $delta => &$file) {
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// keep alt, title, description if they already exist
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if (array_key_exists($file['fid'], $existing_files)) {
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foreach (array('title', 'description', 'alt') as $property) {
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if (!empty($existing_files[$file['fid']][$property])) {
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$file[$property] = $existing_files[$file['fid']][$property];
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}
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}
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}
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}
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$translation->{$field}[$translation->language] = $translated_files;
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}
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}
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