Club Drupal

<?php

/**

 * @file

 * Definition of views_handler_relationship_translation.

 */

/**

 * Handles relationships for content translation sets and provides multiple

 * options.

 *

 * @ingroup views_relationship_handlers

 */

class views_handler_relationship_translation extends views_handler_relationship {

  /**

   * {@inheritdoc}

   */

  public function option_definition() {

    $options = parent::option_definition();

    $options['language'] = array('default' => 'current');

    return $options;

  }

  /**

   * Add a translation selector.

   */

  public function options_form(&$form, &$form_state) {

    parent::options_form($form, $form_state);

    $options = array(

      'all' => t('All'),

      'current' => t('Current language'),

      'default' => t('Default language'),

    );

    $options = array_merge($options, views_language_list());

    $form['language'] = array(

      '#type' => 'select',

      '#options' => $options,

      '#default_value' => $this->options['language'],

      '#title' => t('Translation option'),

      '#description' => t('The translation options allows you to select which translation or translations in a translation set join on. Select "Current language" or "Default language" to join on the translation in the current or default language respectively. Select a specific language to join on a translation in that language. If you select "All", each translation will create a new row, which may appear to cause duplicates.'),

    );

  }

  /**

   * Called to implement a relationship in a query.

   */

  public function query() {

    // Figure out what base table this relationship brings to the party.

    $table_data = views_fetch_data($this->definition['base']);

    $base_field = empty($this->definition['base field']) ? $table_data['table']['base']['field'] : $this->definition['base field'];

    $this->ensure_my_table();

    $def = $this->definition;

    $def['table'] = $this->definition['base'];

    $def['field'] = $base_field;

    $def['left_table'] = $this->table_alias;

    $def['left_field'] = $this->field;

    if (!empty($this->options['required'])) {

      $def['type'] = 'INNER';

    }

    $def['extra'] = array();

    if ($this->options['language'] != 'all') {

      switch ($this->options['language']) {

        case 'current':

          $def['extra'][] = array(

            'field' => 'language',

            'value' => '***CURRENT_LANGUAGE***',

          );

          break;

        case 'default':

          $def['extra'][] = array(

            'field' => 'language',

            'value' => '***DEFAULT_LANGUAGE***',

          );

          break;

        // Other values will be the language codes.

        default:

          $def['extra'][] = array(

            'field' => 'language',

            'value' => $this->options['language'],

          );

          break;

      }

    }

    if (!empty($def['join_handler']) && class_exists($def['join_handler'])) {

      $join = new $def['join_handler'];

    }

    else {

      $join = new views_join();

    }

    $join->definition = $def;

    $join->extra = "(%alias.tnid != 0  OR ({$def['left_table']}.tnid = 0 AND %alias.nid = {$def['left_table']}.nid))";

    $join->construct();

    $join->adjusted = TRUE;

    // Use a short alias for this.

    $alias = $def['table'] . '_' . $this->table;

    $this->alias = $this->query->add_relationship($alias, $join, $this->definition['base'], $this->relationship);

  }

}