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   1  <?php
   2  
   3  /**
   4   * Handles relationships for content translation sets and provides multiple
   5   * options.
   6   */
   7  class views_handler_relationship_translation extends views_handler_relationship {
   8    function option_definition() {
   9      $options = parent::option_definition();
  10      $options['language'] = array('default' => 'current');
  11  
  12      return $options;
  13    }
  14  
  15    /**
  16     * Add a translation selector.
  17     */
  18    function options_form(&$form, &$form_state) {
  19      parent::options_form($form, $form_state);
  20  
  21      $options = array(
  22        'all' => t('All'),
  23        'current' => t('Current language'),
  24        'default' => t('Default language'),
  25      );
  26      $options = array_merge($options, locale_language_list());
  27      $form['language'] = array(
  28        '#type' => 'select',
  29        '#options' => $options,
  30        '#default_value' => $this->options['language'],
  31        '#title' => t('Translation option'),
  32        '#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.'),
  33      );
  34    }
  35  
  36    /**
  37     * Called to implement a relationship in a query.
  38     */
  39    function query() {
  40      // Figure out what base table this relationship brings to the party.
  41      $table_data = views_fetch_data($this->definition['base']);
  42      $base_field = empty($this->definition['base field']) ? $table_data['table']['base']['field'] : $this->definition['base field'];
  43  
  44      $this->ensure_my_table();
  45  
  46      $def = $this->definition;
  47      $def['table'] = $this->definition['base'];
  48      $def['field'] = $base_field;
  49      $def['left_table'] = $this->table_alias;
  50      $def['left_field'] = $this->field;
  51      if (!empty($this->options['required'])) {
  52        $def['type'] = 'INNER';
  53      }
  54  
  55      $def['extra'] = array();
  56      if ($this->options['language'] != 'all') {
  57        switch ($this->options['language']) {
  58          case 'current':
  59            $def['extra'][] = array(
  60              'field' => 'language',
  61              'value' => '***CURRENT_LANGUAGE***',
  62            );
  63            break;
  64          case 'default':
  65            $def['extra'][] = array(
  66              'field' => 'language',
  67              'value' => '***DEFAULT_LANGUAGE***',
  68            );
  69            break;
  70          // Other values will be the language codes.
  71          default:
  72            $def['extra'][] = array(
  73              'field' => 'language',
  74              'value' => $this->options['language'],
  75            );
  76            break;
  77        }
  78      }
  79  
  80      if (!empty($def['join_handler']) && class_exists($def['join_handler'])) {
  81        $join = new $def['join_handler'];
  82      }
  83      else {
  84        $join = new views_join();
  85      }
  86  
  87      $join->definition = $def;
  88      $join->construct();
  89      $join->adjusted = TRUE;
  90  
  91      // use a short alias for this:
  92      $alias = $def['table'] . '_' . $this->table;
  93  
  94      $this->alias = $this->query->add_relationship($alias, $join, $this->definition['base'], $this->relationship);
  95    }
  96  }