<?php
// $Id: i18nviews.module,v 1.4 2008-02-17 19:32:12 jareyero Exp $

/**
 * @file
 * Views support for Internationalization (i18n) package
 *
 * This module uses i18n module namespace to add some views hooks
 * 
 * @author Jose A. Reyero, 2007
 */

/**
 * Views integration
 */
function i18n_views_tables() {
  $tables['i18n'] = array(
    'name' => 'i18n_node',
    'join' => array(
      'left' => array(
        'table' => 'node',
        'field' => 'nid'
      ),
      'right' => array(
        'field' => 'nid'
      )
    )
  );
  $tables['i18n']['fields']['language'] = array(
   'name' => t('Internationalization: Language'),
   'sortable' => true,
   'handler' => 'i18n_views_handler_language',
  );
  $tables['i18n']['filters']['language'] = array(
    'name' => t('Internationalization: Language'),
    'list-type' => 'list',
    'value-type' => 'array',
    'list' => 'i18n_views_language_list',
    'operator' => 'views_handler_operator_or',
    'help' => t('Enabled languages for content.'),
  );
  $tables['i18n']['filters']['extlanguage'] = array(
    'field' => 'language',
    'name' => t('Internationalization: Language (extended)'),
    'list-type' => 'list',
    'value-type' => 'array',
    'list' => 'i18n_views_language_list_all',
    'operator' => 'views_handler_operator_or',
    'help' => t('All defined languages for content.'),
  );  
  $tables['i18n']['filters']['selection'] = array(
    'name' => t('Internationalization: Selection'),
    'handler' => 'i18n_views_filter_handler',
    'list-type' => 'select',
    'operator' => array('=' => t('Is')),
    'list' => '_i18n_selection_mode',
    'help' => t('Content language.'),
    'cacheable' => 'no' // This query condition cannot be cached
  );
  return $tables;
}

function i18n_views_language_list($a, $b){
  return locale_language_list();
}
function i18n_views_language_list_all($a, $b){
  return locale_language_list('name', TRUE);
}
function i18n_views_handler_language($fieldinfo, $fielddata, $value, $data) {
  $languages = locale_language_list('name', TRUE);
  return $languages[$value];
}

/**
 * Filter handler callback. Manages language selection mode
 */
function i18n_views_filter_handler($filterdata, $filterinfo, &$query) {
  if ($filterdata == 'handler' && $filterinfo['field'] == 'i18n.selection' && $mode = $filterinfo['value']) {
    // If this filter is used, rollback value set in pre_query and set the new one.
    i18n_selection_mode('reset');
    i18n_selection_mode($mode);
  } 
}
/**
 * Implementation of hook_views_pre_query().
 * 
 * Disable language conditions for views. This is called before filter handlers
 */
function i18n_views_pre_query(&$view) {
  // If any language filter, the language selection mode will be 'off'
  foreach($view->exposed_filter as $filter) {
    if($filter['field'] == 'i18n.language') {
      i18n_selection_mode('off');
      return;
    }
  }
  // If no filter, sets the one from settings for this view 
  i18n_selection_mode(variable_get('i18n_selection_mode', 'simple'));
}
/**
 * Implementation of hook_views_pre_view().
 * 
 * If used language selection filter, reset query rewriting again
 */
function i18n_views_pre_view(&$view, &$items) {
  i18n_selection_mode('reset');
}

/**
 * Implementation of hook_form_alter()
 * 
 * @ TODO Copied from i18ntaxonomy, update all this
 */
function i18nviews_form_alter(&$form, $form_state, $form_id) {
  
  if ($form_id == 'views_filters' && $translate = variable_get('i18ntaxonomy_vocabularies', array())) {
    // We only translate exposed filters here
    $view = $form['view']['#value'];
    if($view->exposed_filter) {
      foreach($view->exposed_filter as $index => $filter) {
        $matches = array();
        if($filter['field'] == 'term_node.tid') {
          // That's a full taxonomy box. Translate options: arary(tid => "Vocabulary: Term")
          // First, we get a translated list. Then we replace on the options array
          $replace = _i18ntaxonomy_vocabulary_terms(array_keys($translate));
          foreach($replace as $tid => $name) {
            if(isset($form["filter$index"]['#options'][$tid])) {
              $form["filter$index"]['#options'][$tid] = $name;
            }
          }
        } elseif(preg_match("/term_node_(\d+)\.tid/", $filter['field'], $matches)) {
          $vid = $matches[1];
          if ($translate[$vid]) { 
            // Translate this vocabulary terms, field name is filter$index vid = $matches[1]
            foreach ($form["filter$index"]['#options'] as $value => $option) {
              if ($value != '**ALL**') { // ALL option should be already localized
                // This may be an object with an option property being an array (tid => name)
                if (is_object($option) && is_array($option->option)) {
                  foreach (array_keys($option->option) as $tid) {
                    $option->option[$tid] = t($option->option[$tid]);
                  }
                  $form["filter$index"]['#options'][$value] = $option;
                // But it used to be a plain string, so let's keep this just in case...
                } elseif(is_string($option)) {
                  $form["filter$index"]['#options'][$value] = t($option);
                }
              }
            }
          }
        }
      }
    }
  }
}