Blogging API helper - find allowed taxonomy terms for a node type.

File

drupal-6.x/modules/blogapi/blogapi.module, line 565

Enable users to post using applications that support XML-RPC blog APIs.

Code

function blogapi_mt_validate_terms($node) {
  // We do a lot of heavy lifting here since taxonomy module doesn't have a
  // stand-alone validation function.
  if (module_exists('taxonomy')) {
    $found_terms = array();
    if (!empty($node->taxonomy)) {
      $term_list = array_unique($node->taxonomy);
      $params = $term_list;
      $params[] = $node->type;
      $result = db_query(db_rewrite_sql("SELECT t.tid, t.vid FROM {term_data} t INNER JOIN {vocabulary_node_types} n ON t.vid = n.vid WHERE t.tid IN (" . db_placeholders($term_list) . ") AND n.type = '%s'", 't', 'tid'), $params);
      $found_terms = array();
      $found_count = 0;
      while ($term = db_fetch_object($result)) {
        $found_terms[$term->vid][$term->tid] = $term->tid;
        $found_count++;
      }
      // If the counts don't match, some terms are invalid or not accessible to this user.
      if (count($term_list) != $found_count) {
        return blogapi_error(t('Invalid categories submitted.'));
      }
    }
    // Look up all the vocabularies for this node type.
    $result2 = db_query(db_rewrite_sql("SELECT v.vid, v.name, v.required, v.multiple FROM {vocabulary} v INNER JOIN {vocabulary_node_types} n ON v.vid = n.vid WHERE n.type = '%s'", 'v', 'vid'), $node->type);
    // Check each vocabulary associated with this node type.
    while ($vocabulary = db_fetch_object($result2)) {
      // Required vocabularies must have at least one term.
      if ($vocabulary->required && empty($found_terms[$vocabulary->vid])) {
        return blogapi_error(t('A category from the @vocabulary_name vocabulary is required.', array('@vocabulary_name' => $vocabulary->name)));
      }
      // Vocabularies that don't allow multiple terms may have at most one.
      if (!($vocabulary->multiple) && (isset($found_terms[$vocabulary->vid]) && count($found_terms[$vocabulary->vid]) > 1)) {
        return blogapi_error(t('You may only choose one category from the @vocabulary_name vocabulary.'), array('@vocabulary_name' => $vocabulary->name));
      }
    }
  }
  elseif (!empty($node->taxonomy)) {
    return blogapi_error(t('Error saving categories. This feature is not available.'));
  }
  return TRUE;
}