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<?php
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  /**
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   * Returns the localized representations of the modifiers hold by the
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   * supplied cdm instance concatenated into one string.
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   *
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   * @param object $iModifieable
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   *   cdm instance of an class implementing the interface IModifieable:
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   *   DescriptionElementBase, StateDate, State
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   *
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   * @return String
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   *    localized representations of the modifiers hold by the
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   *    supplied cdm instance concatenated into one string
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   */
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  function cdm_modifers_representations($iModifieable, $glue = ', ') {
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    $modifiers_strings = array();
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    if (isset($iModifieable->modifiers)) {
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      foreach ($iModifieable->modifiers as $modifier) {
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        $modifiers_strings[] = cdm_term_representation($modifier);
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      }
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    }
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    return implode(', ', $modifiers_strings);
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  }
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  /**
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   * Filters the given set of description elements and prefers
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   * computed elements over others. Computed description elements
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   * are identified by the MarkerType.COMPUTED()
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   *
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   * If the given set contains at least one computed element only
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   * the computed elements are returned.
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   *
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   * @param $description_elements
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   *   An array of CDM DescriptionElementBase instances
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   *
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   * @return
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   *  only the computed description elements otherwise all others.
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   *
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   * @deprecated this is replaced by the cdmlib DistributionUtil class!!!
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   */
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  function cdm_description_elements_prefer_computed($description_elements){
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    $computed_elements = array();
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    $other_elements = array();
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    if(!empty($description_elements)){
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      foreach ($description_elements as $element) {
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        if(cdm_entity_has_marker($element, UUID_MARKERTYPE_COMPUTED)){
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          $computed_elements[] = $element;
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        } else {
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          $other_elements[] = $element;
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        }
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      }
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    }
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    if(count($computed_elements) > 0) {
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      return $computed_elements;
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    } else {
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      return $other_elements;
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    }
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  }
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  /**
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   * @return array
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   */
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  function cdm_distribution_filter_query(){
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    $cdm_distribution_filter = get_array_variable_merged(CDM_DISTRIBUTION_FILTER, CDM_DISTRIBUTION_FILTER_DEFAULT);
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    $query = array();
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    if($cdm_distribution_filter['filter_rules']['statusOrderPreference']){
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      $query['statusOrderPreference'] = 1;
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    }
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    if($cdm_distribution_filter['filter_rules']['subAreaPreference']){
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      $query['subAreaPreference'] = 1;
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    }
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    if(is_array($cdm_distribution_filter['hideMarkedAreas']) && count($cdm_distribution_filter['hideMarkedAreas']) > 0){
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      $query['hideMarkedAreas'] = '';
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      foreach ($cdm_distribution_filter['hideMarkedAreas'] as $marker_type => $enabled)
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        if($enabled){
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          $query['hideMarkedAreas'] .= ($query['hideMarkedAreas'] ? ',' : '') . $marker_type;
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        }
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    }
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    return $query;
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  }
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  /**
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   * Merge the fields 'annotations', 'markers', 'sources', 'media' from the source CDM DescriptionElement into  the target.
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   *
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   * @param $target
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   *     The source CDM DescriptionElement
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   * @param $source
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   *     The target CDM DescriptionElement
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   */
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  function cdm_merge_description_elements(&$target, &$source){
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    static $fields_to_merge = array('annotations', 'markers', 'sources', 'media');
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    foreach ($fields_to_merge as $field){
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      if(is_array($source->$field)) {
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        if(!is_array($target->$field)){
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          $target->$field = $source->$field;
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        } else {
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          $target->$field = array_merge($target->$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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   * Adds an entry to the end of the table of content items list
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   *
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   * The  table of content items are crated internally by calling
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   * toc_list_item() the resulting item is added to the statically cached
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   * list of toc elements
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   *
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   * @param $label
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   *  The label of toc entry
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   * @param $class_attribute_suffix
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   *  The suffix to be appended to the class attribute prefix: "feature-toc-item-"
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   * @param $fragment
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   *  Optional parameter to define a url fragment different from the $label,
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   *  if the $fragment is not defined the $label will be used
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   */
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  function cdm_toc_list_add_item($label, $class_attribute_suffix, $fragment = NULL, $as_first_element = FALSE){
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    $toc_list_items = &cdm_toc_list();
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    if(!$fragment){
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      $fragment = $label;
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    }
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    $fragment = generalizeString($fragment);
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    $class_attributes = 'feature-toc-item-' . $class_attribute_suffix;
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    $new_item = toc_list_item(
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      theme(
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        'cdm_feature_name',
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        array('feature_name' => $label))
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      ,
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      array('class' => $class_attributes),
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      $fragment
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    );
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    if($as_first_element){
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      array_unshift($toc_list_items, $new_item);
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    } else {
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      $toc_list_items[] = $new_item;
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    }
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  }
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  /**
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   * Returns the statically cached table of content items as render array
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   *
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   * @see see also cdm_toc_list_add_item()
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   *
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   * @return array
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   *   a render array of table of content items suitable for theme_item_list()
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   */
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  function &cdm_toc_list(){
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    $toc_list_items = &drupal_static('toc_list_items', array());
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    return $toc_list_items;
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  }
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/**
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 * Prepares an empty Drupal block for displaying description elements of a specific CDM Feature.
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 *
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 * The block can also be used for pseudo Features like a bibliography. Pseudo features are
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 * derived from other data on the fly and so not exist as such in the cdm data. In case
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 * of pseudo features the $feature is left empty
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 *
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 * @param $feature_name
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 *    A label describing the feature, usually the localized feature representation.
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 * @param $feature
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 *    The CDM Feature for which the block is created. (optional)
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 * @return object
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 *    A Drupal block object
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 */
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function feature_block($feature_name, $feature = null) {
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  $block = new stdclass(); // Empty object.
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  $block->module = 'cdm_dataportal';
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  $block->delta = generalizeString($feature_name);
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  $block->region = null;
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  $block->subject = '<a name="' . $block->delta . '"></a><span class="' . html_class_attribute_ref($feature) . '">'
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    . theme('cdm_feature_name', array('feature_name' => $feature_name))
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    . '</span>';
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  $block->module = "cdm_dataportal-feature";
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  $block->content = '';
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  return $block;
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}
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  /**
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   * Creates a list item for a table of content, suitable as data element for a themed list
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   *
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   * @see theme_list()
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   *
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   * @param $label
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   * @param $http_request_params
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   * @param $attributes
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   * @return array
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   */
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  function toc_list_item($label, $attributes = array(), $fragment = null) {
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    // we better cache here since drupal_get_query_parameters has no internal static cache variable
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    $http_request_params = drupal_static('http_request_params', drupal_get_query_parameters());
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    $item =  array(
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      'data' => l(
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        $label,
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        $_GET['q'],
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        array(
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          'attributes' => array('class' => array('toc')),
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          'fragment' => generalizeString($label),
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          'query' => $http_request_params
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        )
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      )
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    );
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    $item['attributes'] = $attributes;
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    return $item;
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  }
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  /**
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   * Creates the footnotes for the given CDM DescriptionElement instance.
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   *
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   * Footnotes are created for annotatins and original sources.
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   *
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   * @param $descriptionElement
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   *     A CDM DescriptionElement instance
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   * @param $separator
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   *     Optional parameter. The separator string to concatenate the footnote ids, default is ','
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   * @param $footnote_list_key_suggestion
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   * @return String
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   *    The foot note keys
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   */
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  function cdm_create_description_element_footnotes($description_element, $separator = ',', $footnote_list_key_suggestion = null){
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    // Annotations as footnotes.
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    $footNoteKeys = cdm_annotations_as_footnotekeys($description_element, $footnote_list_key_suggestion);
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    // Source references as footnotes.
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    $bibliography_settings = get_bibliography_settings();
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    $original_source_footnote_tag = $bibliography_settings['enabled'] == 1 ? 'div' : null; // otherwise the default
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    foreach ($description_element->sources as $source) {
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      if (_is_original_source_type($source)) {
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        $fn_key = FootnoteManager::addNewFootnote(
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          original_source_footnote_list_key($footnote_list_key_suggestion),
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          theme('cdm_OriginalSource', array(
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            'source' => $source,
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            'doLink' => FALSE,
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          )),
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          $original_source_footnote_tag
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        );
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        // Ensure uniqueness of the footnote keys.
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        cdm_add_footnote_to_array($footNoteKeys, $fn_key);
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      }
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    }
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    // Sort and render footnote keys.
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    $footnoteKeyListStr = '';
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    asort($footNoteKeys);
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    foreach ($footNoteKeys as $footNoteKey) {
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      $footnoteKeyListStr .= theme('cdm_footnote_key',
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        array(
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          'footnoteKey' => $footNoteKey,
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          'separator' => ($footnoteKeyListStr ? $separator : '')));
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    }
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    return $footnoteKeyListStr;
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  }
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  /**
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   *
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   * @return string the footnote_list_key
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   */
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  function original_source_footnote_list_key($key_suggestion = null) {
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    if(!$key_suggestion){
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      $key_suggestion = RenderHints::getFootnoteListKey();
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    }
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    $bibliography_settings = get_bibliography_settings();
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    $footnote_list_key = $bibliography_settings['enabled'] == 1 ? 'BIBLIOGRAPHY' : $key_suggestion;
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    return $footnote_list_key;
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  }
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