<?php
/**
 * @file
 * Helper functions for taxonomy administration 
 */

 /**
 * This is the callback for taxonomy translations
 * 
 * Gets the urls:
 * admin/content/taxonomy/%taxonomy_vocabulary/translation'  
 *  admin/content/taxonomy/i18n/term/xx
 *    admin/content/taxonomy/i18n/term/new/xx
 *    admin/content/taxonomy/vid/translation/op/trid
 */
function i18ntaxonomy_page_vocabulary($vocabulary, $op = NULL, $tid = NULL) {
  switch ($op) {
    case 'edit':
      drupal_set_title(t('Edit term translations'));
      $output = drupal_get_form('i18ntaxonomy_translation_term_form', $vocabulary->vid, $tid);
      break;
    case t('Submit'):
      drupal_set_title(t('Submit'));
      i18ntaxonomy_translation_term_save($edit);
      $output = i18ntaxonomy_translation_overview($vocabulary->vid);
      break;
    case 'delete':
      //print theme('page', node_delete($edit), t('Delete'));
      break;
    default:
      $output = i18ntaxonomy_translation_overview($vocabulary->vid);
  }
  return $output;   
}

/**
 * Produces a vocabulary translation form
 */
function i18ntaxonomy_translation_term_form($form_state, $vid, $trid = NULL, $edit = array()) {
  $languages = i18n_supported_languages();
  if ($trid == 'new') {
    $translations = array();
    $form['trid'] = array('#type' => 'hidden', '#value' => 0);
  } else {
    $form['trid'] = array('#type' => 'hidden', '#value' => $trid);
    $translations = i18ntaxonomy_term_get_translations(array('trid' =>$trid));
  } 
  //var_dump($translations);
  $vocabulary = taxonomy_vocabulary_load($vid);
  
  // List of terms for languages
  foreach ($languages as $lang => $langname) {
    $current = isset($translations[$lang]) ? $translations[$lang]->tid : '';
    $list = i18ntaxonomy_vocabulary_get_terms($vid, $lang, 'all');
    $list[''] = '--';
    $form[$lang] = array('#type' => 'fieldset', '#tree' => TRUE);
    $form[$lang]['tid'] = array(
      '#type' => 'select', 
      '#title' => $langname,
      '#default_value' => $current,
      '#options' => $list
    );
    $form[$lang]['old'] = array('#type' => 'hidden', '#value' =>$current);
  }
  $form['submit'] = array('#type' => 'submit', '#value' => t('Save'));
  $form['destination'] = array('#type' => 'hidden', '#value' => 'admin/content/taxonomy/'.arg(3).'/translation');
  return $form;
}

/**
 * Form callback: Process vocabulary translation form
 */
function i18ntaxonomy_translation_term_form_submit($form, &$form_state) {
  $form_values = $form_state['values'];
  i18ntaxonomy_translation_save($form_values, $form_values['trid']);
  drupal_set_message(t('Term translations have been updated.'));
}

/**
 * Save taxonomy term translations
 * 
 * @param $terms
 *   Array of terms indexed by language
 * @param $trid
 *   Optional translation set id
 */
function i18ntaxonomy_translation_save($terms, $trid = 0) {
  // Delete old translations for this trid
  if ($trid){
    db_query("UPDATE {term_data} SET trid = 0 WHERE trid= %d", $trid);
  }
  // Now pick up all the tids in an array
  $translations = array();
  foreach (i18n_supported_languages() as $lang => $name) {
    if (isset($terms[$lang]) && ($term = (array)$terms[$lang]) && $tid = $term['tid']) {
      $translations[$lang] = $tid;
    }
  }
  // Now set a translation set with all these terms.
  if (count($translations)) {
    $trid = (is_numeric($trid) && $trid) ? $trid : i18ntaxonomy_next_trid();
    db_query('UPDATE {term_data} SET trid = %d WHERE tid IN(%s)', $trid, implode(',',$translations));
  }  
}

/**
 * Get next free trid.
 */
function i18ntaxonomy_next_trid() {
  $current = (int)db_result(db_query('SELECT max(trid) FROM {term_data}'));
  return $current + 1;
}

/**
 * Generate a tabular listing of translations for vocabularies.
 */
function i18ntaxonomy_translation_overview($vid) {
  $vocabulary = taxonomy_vocabulary_load($vid);
  drupal_set_title(check_plain($vocabulary->name));
  $output = '';

  $languages = i18n_supported_languages();
  $header = array_merge($languages, array(t('Operations')));
  $links = array();
  $types = array();
  // Get terms/translations for this vocab 
  $result = db_query('SELECT * FROM {term_data} t WHERE vid=%d',$vocabulary->vid);
  $terms = $messages = array();
  while ($term = db_fetch_object($result)) {
    if($term->trid && $term->language) {
      $terms[$term->trid][$term->language] = $term;
    }
  }
  // Reorder data for rows and languages
  $rows = array();
  foreach ($terms as $trid => $terms) {
    $thisrow = array();
    foreach ($languages as $lang => $name) {
      if (array_key_exists($lang, $terms)) {
        $thisrow[] = l($terms[$lang]->name, 'taxonomy/term/'.$terms[$lang]->tid);
       }
       else {
        $thisrow[] = '--';
       }
    }
    $thisrow[] = l(t('edit'), "admin/content/taxonomy/$vid/translation/edit/$trid");
    $rows[] = $thisrow;
  }
  if ($rows) {
    $output .= theme('table', $header, $rows);
  } else {
    $messages[] = t('No translations defined for this vocabulary.');
  }
  $messages[]= l(t('Create new translation'), "admin/content/taxonomy/$vid/translation/edit/new");
  $output .= theme('item_list', $messages);
  return $output;
}