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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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* Keeps vocabulary terms in sync for translations.
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* This is a per-vocabulary option.
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*
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* Ref: http://drupal.org/node/115463
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*
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* Notes:
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* This module needs to run after taxonomy, i18n, translation. Check module weight.
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*/
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/**
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* Global switch to enable / disable syncing and check whether we are synching at the moment
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*
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* @return boolean
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* TRUE if we need to run sync operations. FALSE during syncing so we don't have recursion.
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*/
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function i18n_sync($status = NULL) {
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static $current = TRUE;
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if (isset($status)) {
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$current = $status;
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}
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return $current;
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}
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/**
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* Implements hook_help().
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*/
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function i18n_sync_help($path, $arg) {
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switch ($path) {
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case 'admin/help#i18n_sync' :
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$output = '<p>' . t('This module synchronizes content taxonomy and fields accross translations:') . '</p>';
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$output .= '<p>' . t('First you need to select which fields should be synchronized. Then, after a node has been updated, all enabled vocabularies and fields will be synchronized as follows:') . '</p>';
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$output .= '<ul>';
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$output .= '<li>' . t('All the node fields selected for synchronization will be set to the same value for all translations.') . '</li>';
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$output .= '<li>' . t('For multilingual vocabularies, the terms for all translations will be replaced by the translations of the original node terms.') . '</li>';
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$output .= '<li>' . t('For other vocabularies, the terms will be just copied over to all the translations.') . '</li>';
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$output .= '</ul>';
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$output .= '<p><strong>' . t('Note that permissions are not checked for each node. So if someone can edit a node and it is set to synchronize, all the translations will be synchronized anyway.') . '</strong></p>';
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$output .= '<p>' . t('To enable synchronization check content type options to select which fields to synchronize for each node type.') . '</p>';
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$output .= '<p>' . t('The list of available fields for synchronization will include some standard node fields and all CCK fields. You can add more fields to the list in a configuration variable. See README.txt for how to do it.') . '</p>';
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$output .= '<p>' . t('For more information, see the online handbook entry for <a href="@i18n">Internationalization module</a>.', array('@i18n' => 'http://drupal.org/node/133977')) . '</p>';
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return $output;
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}
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}
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/**
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* Implements hook_hook_info().
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*/
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function i18n_sync_hook_info() {
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$hooks['i18n_sync_options'] = array(
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'group' => 'i18n',
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);
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return $hooks;
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}
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/**
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* Implements hook_field_info_alter()
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*/
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function i18n_sync_field_info_alter(&$fields) {
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foreach (array('file', 'image') as $type) {
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if (isset($fields[$type])) {
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$fields[$type]['i18n_sync_callback'] = 'i18n_sync_field_file_sync';
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}
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}
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}
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/**
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* Implements hook_form_FORM_ID_alter().
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*/
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function i18n_sync_form_node_type_form_alter(&$form, &$form_state) {
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if (isset($form['type'])) {
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$type = $form['#node_type']->type;
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$disabled = !translation_supported_type($type);
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$form['i18n_sync'] = array(
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'#type' => 'fieldset',
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'#title' => t('Synchronize translations'),
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'#collapsible' => TRUE,
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'#collapsed' => TRUE,
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'#group' => 'additional_settings',
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'#attributes' => array(
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'class' => array('i18n-node-type-settings-form'),
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),
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'#description' => t('Select which fields to synchronize for all translations of this content type.'),
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'#disabled' => $disabled,
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);
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$form['i18n_sync']['i18n_sync_node_type'] = array(
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'#tree' => TRUE,
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);
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// Each set provides title and options. We build a big checkboxes control for it to be
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// saved as an array.
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$current = i18n_sync_node_fields($type);
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// Group options, group fields by type.
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$groups = array(
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'node' => t('Standard node fields'),
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'fields' => t('Configurable fields'),
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);
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$fields = array();
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foreach (i18n_sync_node_options($type) as $field => $info) {
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$group = isset($info['group']) && isset($groups[$info['group']]) ? $info['group'] : 'node';
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$fields[$group][$field] = $info;
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}
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foreach ($fields as $group => $group_fields) {
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$form['i18n_sync']['i18n_sync_node_type']['i18n_sync_group_' . $group] = array(
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'#prefix' => '<strong>', '#suffix' => '</strong>',
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'#markup' => $groups[$group],
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);
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foreach ($group_fields as $field => $info) {
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$form['i18n_sync']['i18n_sync_node_type'][$field] = array(
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'#title' => $info['title'],
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'#type' => 'checkbox',
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'#default_value' => in_array($field, $current),
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'#disabled' => $disabled,
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'#description' => isset($info['description']) ? $info['description'] : '',
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);
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}
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}
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}
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}
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/**
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* Check whether this node is to be synced
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*/
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function i18n_sync_node_check($node) {
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return translation_supported_type($node->type) && i18n_object_langcode($node) && i18n_sync();
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}
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/**
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* Get node translations if any, excluding the node itself
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*
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* @param $reset
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* Whether to reset the translation_node_get_translations cache.
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*/
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function i18n_sync_node_get_translations($node, $reset = FALSE) {
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if (!empty($node->tnid)) {
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if ($reset) {
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// Clear the static cache of translation_node_get_translations
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$translations_cache = &drupal_static('translation_node_get_translations', array());
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unset($translations_cache[$node->tnid]);
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}
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// Maybe translations are already here
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if ($translations = translation_node_get_translations($node->tnid)) {
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unset($translations[$node->language]);
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return $translations;
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}
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}
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}
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/**
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* Implements hook_node_insert().
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*/
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function i18n_sync_node_insert($node) {
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// When creating a translation, there are some aditional steps, different from update
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if (i18n_sync_node_check($node) && !empty($node->translation_source)) {
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i18n_sync_node_update($node);
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}
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}
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/**
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* Implements hook_node_update().
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*/
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function i18n_sync_node_update($node) {
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// Let's go with field synchronization.
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if (i18n_sync_node_check($node) && !empty($node->tnid) && ($fields = i18n_sync_node_fields($node->type)) && ($translations = i18n_sync_node_get_translations($node, TRUE))) {
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module_load_include('node.inc', 'i18n_sync');
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i18n_sync_node_translation($node, $translations, $fields, 'update');
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}
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}
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/**
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* Implements hook_node_prepare().
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*/
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function i18n_sync_node_prepare($node) {
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// If creating a translation, copy over all the fields to be synchronized.
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if (empty($node->nid) && !empty($node->translation_source) && ($sync_fields = i18n_sync_node_fields($node->type))) {
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$source = $node->translation_source;
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$i18n_options = i18n_sync_node_options($node->type);
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// Copy over standard node fields. The rest are handled by field_attach_prepare_translation()
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foreach ($sync_fields as $field) {
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if (!empty($source->$field) && empty($i18n_options[$field]['field_name'])) {
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if ($field == 'uid') {
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$node->name = $source->name;
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}
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elseif ($field == 'created') {
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$node->date = format_date($source->created, 'custom', 'Y-m-d H:i:s O');
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}
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else {
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$node->$field = $source->$field;
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}
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}
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}
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}
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}
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/**
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* Returns list of fields to synchronize for a given content type.
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*
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* @param $type
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* Node type.
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* @param $field
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* Optional field name to check whether it is in the list
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*/
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function i18n_sync_node_fields($type, $field = NULL) {
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$fields = variable_get('i18n_sync_node_type_' . $type, array());
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return $field ? in_array($field, $fields) : $fields;
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}
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/**
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* Returns list of available fields for given content type.
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*
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* Fields can also be changed using hook_i18n_sync_fields_alter($fields, $type)
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*
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* @param $type
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* Node type.
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*/
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function i18n_sync_node_options($type) {
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return i18n_sync_options('node', $type);
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}
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/**
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* Returns list of available fields for given entity / bundle.
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*
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* Fields can also be changed using hook_i18n_sync_options_alter($fields, $type)
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*
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* @param $entity_type
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* Entity type.
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* @param
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*/
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function i18n_sync_options($entity_type, $bundle_name) {
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$cache = &drupal_static(__FUNCTION__);
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if (!isset($cache[$entity_type][$bundle_name])) {
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module_load_include('modules.inc', 'i18n_sync');
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$fields = module_invoke_all('i18n_sync_options', $entity_type, $bundle_name);
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// Give a chance to modules to change/remove/add their own fields
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drupal_alter('i18n_sync_options', $fields, $entity_type, $bundle_name);
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$cache[$entity_type][$bundle_name] = $fields;
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}
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return $cache[$entity_type][$bundle_name];
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}
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/**
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* Synchronize entity field translation
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*/
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function i18n_sync_field_translation_sync($entity_type, $bundle_name, $entity, $langcode, $source_entity, $source_langcode, $field_name) {
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$field = field_info_field($field_name);
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$instance = field_info_instance($entity_type, $field_name, $bundle_name);
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$source_lang = field_language($entity_type, $source_entity, $field_name);
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$translation_lang = field_is_translatable($entity_type, $field) ? $entity->language : LANGUAGE_NONE;
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if (isset($source_entity->{$field_name}[$source_lang])) {
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$items = $source_entity->{$field_name}[$source_lang];
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// Determine the function to synchronize this field. If none, just copy over.
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$type_info = field_info_field_types($field['type']);
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if (isset($type_info['i18n_sync_callback'])) {
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$function = $type_info['i18n_sync_callback'];
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$function($entity_type, $entity, $field, $instance, $langcode, $items, $source_entity, $source_langcode);
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}
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$entity->{$field_name}[$translation_lang] = $items;
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}
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else {
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// If source not set, unset translation too
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unset($entity->{$field_name}[$translation_lang]);
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}
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}
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/**
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* Sync a file or image field (i18n_sync_callback)
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*
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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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function i18n_sync_field_file_sync($entity_type, $entity, $field, $instance, $langcode, &$items, $source_entity, $source_language) {
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$field_name = $instance['field_name'];
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// Build a copy of the existing files in the translation node
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// indexed by fid for easy retrieval in the copy loop below
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$existing_files = array();
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$field_language = field_language($entity_type, $entity, $field_name, $langcode);
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if (isset($entity->{$field_name}[$field_language])) {
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foreach ($entity->{$field_name}[$field_language] as $delta => $file) {
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$existing_files[$file['fid']] = $file;
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}
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}
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// Start creating the translated copy
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foreach ($items as $delta => &$file) {
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// keep alt, title, description if they already exist
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if (isset($existing_files[$file['fid']])) {
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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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}
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