<?php

/**
 * @file
 * Install, update and uninstall functions for the locale module.
 */

/**
 * Implements hook_install().
 */
function locale_install() {
  // locales_source.source and locales_target.target are not used as binary
  // fields; non-MySQL database servers need to ensure the field type is text
  // and that LIKE produces a case-sensitive comparison.

  db_insert('languages')
    ->fields(array(
      'language' => 'en',
      'name' => 'English',
      'native' => 'English',
      'direction' => 0,
      'enabled' => 1,
      'weight' => 0,
      'javascript' => '',
    ))
    ->execute();
}

/**
 * @addtogroup updates-6.x-to-7.x
 * @{
 */

/**
 * Add context field index and allow longer location.
 */
function locale_update_7000() {
  db_drop_index('locales_source', 'source');
  db_add_index('locales_source', 'source_context', array(array('source', 30), 'context'));

  // Also drop the 'textgroup_location' index added by the i18nstrings module
  // of the i18n project, which prevents the below schema update from running.
  if (db_index_exists('locales_source', 'textgroup_location')) {
    db_drop_index('locales_source', 'textgroup_location');
  }

  db_change_field('locales_source', 'location', 'location', array(
    'type' => 'text',
    'not null' => FALSE,
    'size' => 'big',
    'description' => 'Drupal path in case of online discovered translations or file path in case of imported strings.',
  ));
}

/**
 * Upgrade language negotiation settings.
 */
function locale_update_7001() {
  require_once DRUPAL_ROOT . '/includes/language.inc';
  require_once DRUPAL_ROOT . '/includes/locale.inc';
  require_once DRUPAL_ROOT . '/modules/locale/locale.module';

  switch (variable_get('language_negotiation', 0)) {
    // LANGUAGE_NEGOTIATION_NONE.
    case 0:
      $negotiation = array();
      break;

    // LANGUAGE_NEGOTIATION_PATH_DEFAULT.
    case 1:
      $negotiation = array(LOCALE_LANGUAGE_NEGOTIATION_URL);
      // In Drupal 6 path prefixes are shown for the default language only when
      // language negotiation is set to LANGUAGE_NEGOTIATION_PATH, while in
      // Drupal 7 path prefixes are always shown if not empty. Hence we need to
      // ensure that the default language has an empty prefix to avoid breaking
      // the site URLs with a prefix that previously was missing.
      $default = language_default();
      $default->prefix = '';
      variable_set('language_default', $default);
      db_update('languages')
        ->fields(array('prefix' => $default->prefix))
        ->condition('language', $default->language)
        ->execute();
      break;

    // LANGUAGE_NEGOTIATION_PATH.
    case 2:
      $negotiation = array(LOCALE_LANGUAGE_NEGOTIATION_URL, LOCALE_LANGUAGE_NEGOTIATION_USER, LOCALE_LANGUAGE_NEGOTIATION_BROWSER);
      break;

    // LANGUAGE_NEGOTIATION_DOMAIN.
    case 3:
      variable_set('locale_language_negotiation_url_part', LOCALE_LANGUAGE_NEGOTIATION_URL_DOMAIN);
      $negotiation = array(LOCALE_LANGUAGE_NEGOTIATION_URL);
      break;
  }

  // Save the new language negotiation options.
  language_negotiation_set(LANGUAGE_TYPE_INTERFACE, array_flip($negotiation));
  language_negotiation_set(LANGUAGE_TYPE_CONTENT, array(LOCALE_LANGUAGE_NEGOTIATION_INTERFACE => 0));
  language_negotiation_set(LANGUAGE_TYPE_URL, array(LOCALE_LANGUAGE_NEGOTIATION_URL => 0));

  // Save admininstration UI settings.
  $type = LANGUAGE_TYPE_INTERFACE;
  $provider_weights = array_flip(array_keys(locale_language_negotiation_info()));
  variable_set("locale_language_providers_weight_$type", $provider_weights);

  // Unset the old language negotiation system variable.
  variable_del('language_negotiation');

  return array();
}

/**
 * Updates URL language negotiation by adding the URL fallback detection method.
 */
function locale_update_7002() {
  // language.inc may not have been included during bootstrap if there is not
  // more than one language currently enabled.
  require_once DRUPAL_ROOT . '/includes/language.inc';
  $language_types_info = language_types_info();
  $info = $language_types_info[LANGUAGE_TYPE_URL];
  if (isset($info['fixed'])) {
    language_negotiation_set(LANGUAGE_TYPE_URL, array_flip($info['fixed']));
  }
}

/**
 * Update "language_count" variable.
 */
function locale_update_7003() {
  $languages = language_list('enabled');
  variable_set('language_count', count($languages[1]));
}

/**
 * @} End of "addtogroup updates-6.x-to-7.x"
 */

/**
 * @addtogroup updates-7.x-extra
 * @{
 */

/**
 * Remove duplicates in {locales_source}.
 */
function locale_update_7004() {
  // Look up all duplicates. For each set of duplicates, we select the row
  // with the lowest lid as the "master" that will be preserved.
  $result_source = db_query("SELECT MIN(lid) AS lid, source, context FROM {locales_source} WHERE textgroup = 'default' GROUP BY source, context HAVING COUNT(*) > 1");

  $conflict = FALSE;
  foreach ($result_source as $source) {
    // Find all rows in {locales_target} that are translations of the same
    // string (incl. context).
    $result_target = db_query("SELECT t.lid, t.language, t.plural, t.translation FROM {locales_source} s JOIN {locales_target} t ON s.lid = t.lid WHERE s.source = :source AND s.context = :context AND s.textgroup = 'default' ORDER BY lid", array(
      ':source' => $source->source,
      ':context' => $source->context,
    ));

    $translations = array();
    $keep_lids = array($source->lid);
    foreach ($result_target as $target) {
      if (!isset($translations[$target->language])) {
        $translations[$target->language] = $target->translation;
        if ($target->lid != $source->lid) {
          // Move translation to the master lid.
          db_query('UPDATE {locales_target} SET lid = :new_lid WHERE lid = :old_lid', array(
            ':new_lid' => $source->lid,
            ':old_lid' => $target->lid));
        }
      }
      elseif ($translations[$target->language] == $target->translation) {
        // Delete duplicate translation.
        db_query('DELETE FROM {locales_target} WHERE lid = :lid AND language = :language', array(
          ':lid' => $target->lid,
          ':language' => $target->language));
      }
      else {
        // The same string is translated into several different strings in one
        // language. We do not know which is the preferred, so we keep them all.
        $keep_lids[] = $target->lid;
        $conflict = TRUE;
      }
    }

    // Delete rows in {locales_source} that are no longer referenced from
    // {locales_target}.
    db_delete('locales_source')
      ->condition('source', $source->source)
      ->condition('context', $source->context)
      ->condition('textgroup', 'default')
      ->condition('lid', $keep_lids, 'NOT IN')
      ->execute();
  }

  if ($conflict) {
    $url = 'http://drupal.org/node/746240';
    drupal_set_message('Your {locales_source} table contains duplicates that could not be removed automatically. See <a href="' . $url .'" target="_blank">' . $url . '</a> for more information.', 'warning');
  }
}

/**
 * @} End of "addtogroup updates-7.x-extra"
 */

/**
 * Implements hook_uninstall().
 */
function locale_uninstall() {
  // Delete all JavaScript translation files.
  $locale_js_directory = 'public://' . variable_get('locale_js_directory', 'languages');

  if (is_dir($locale_js_directory)) {
    $files = db_query('SELECT language, javascript FROM {languages}');
    foreach ($files as $file) {
      if (!empty($file->javascript)) {
        file_unmanaged_delete($locale_js_directory . '/' . $file->language . '_' . $file->javascript . '.js');
      }
    }
    // Delete the JavaScript translations directory if empty.
    if (!file_scan_directory($locale_js_directory, '/.*/')) {
      drupal_rmdir($locale_js_directory);
    }
  }

  // Clear variables.
  variable_del('language_default');
  variable_del('language_count');
  variable_del('language_types');
  variable_del('locale_language_negotiation_url_part');
  variable_del('locale_language_negotiation_session_param');
  variable_del('language_content_type_default');
  variable_del('language_content_type_negotiation');
  variable_del('locale_cache_strings');
  variable_del('locale_js_directory');
  variable_del('javascript_parsed');
  variable_del('locale_field_language_fallback');
  variable_del('locale_cache_length');

  foreach (language_types() as $type) {
    variable_del("language_negotiation_$type");
    variable_del("locale_language_providers_weight_$type");
  }

  foreach (node_type_get_types() as $type => $content_type) {
    $setting = variable_del("language_content_type_$type");
  }

  // Switch back to English: with a $language->language value different from 'en'
  // successive calls of t() might result in calling locale(), which in turn might
  // try to query the unexisting {locales_source} and {locales_target} tables.
  drupal_language_initialize();

}

/**
 * Implements hook_schema().
 */
function locale_schema() {
  $schema['languages'] = array(
    'description' => 'List of all available languages in the system.',
    'fields' => array(
      'language' => array(
        'type' => 'varchar',
        'length' => 12,
        'not null' => TRUE,
        'default' => '',
        'description' => "Language code, e.g. 'de' or 'en-US'.",
      ),
      'name' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Language name in English.',
      ),
      'native' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Native language name.',
      ),
      'direction' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Direction of language (Left-to-Right = 0, Right-to-Left = 1).',
      ),
      'enabled' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Enabled flag (1 = Enabled, 0 = Disabled).',
      ),
      'plurals' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Number of plural indexes in this language.',
      ),
      'formula' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Plural formula in PHP code to evaluate to get plural indexes.',
      ),
      'domain' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Domain to use for this language.',
      ),
      'prefix' => array(
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Path prefix to use for this language.',
      ),
      'weight' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Weight, used in lists of languages.',
      ),
      'javascript' => array(
        'type' => 'varchar',
        'length' => 64,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Location of JavaScript translation file.',
      ),
    ),
    'primary key' => array('language'),
    'indexes' => array(
      'list' => array('weight', 'name'),
    ),
  );

  $schema['locales_source'] = array(
    'description' => 'List of English source strings.',
    'fields' => array(
      'lid' => array(
        'type' => 'serial',
        'not null' => TRUE,
        'description' => 'Unique identifier of this string.',
      ),
      'location' => array(
        'type' => 'text',
        'not null' => FALSE,
        'size' => 'big',
        'description' => 'Drupal path in case of online discovered translations or file path in case of imported strings.',
      ),
      'textgroup' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => 'default',
        'description' => 'A module defined group of translations, see hook_locale().',
      ),
      'source' => array(
        'type' => 'text',
        'mysql_type' => 'blob',
        'not null' => TRUE,
        'description' => 'The original string in English.',
      ),
      'context' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The context this string applies to.',
      ),
      'version' => array(
        'type' => 'varchar',
        'length' => 20,
        'not null' => TRUE,
        'default' => 'none',
        'description' => 'Version of Drupal, where the string was last used (for locales optimization).',
      ),
    ),
    'primary key' => array('lid'),
    'indexes' => array(
      'source_context' => array(array('source', 30), 'context'),
    ),
  );

  $schema['locales_target'] = array(
    'description' => 'Stores translated versions of strings.',
    'fields' => array(
      'lid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Source string ID. References {locales_source}.lid.',
      ),
      'translation' => array(
        'type' => 'text',
        'mysql_type' => 'blob',
        'not null' => TRUE,
        'description' => 'Translation string value in this language.',
      ),
      'language' => array(
        'type' => 'varchar',
        'length' => 12,
        'not null' => TRUE,
        'default' => '',
        'description' => 'Language code. References {languages}.language.',
      ),
      'plid' => array(
        'type' => 'int',
        'not null' => TRUE, // This should be NULL for no referenced string, not zero.
        'default' => 0,
        'description' => 'Parent lid (lid of the previous string in the plural chain) in case of plural strings. References {locales_source}.lid.',
      ),
      'plural' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Plural index number in case of plural strings.',
      ),
    ),
    'primary key' => array('language', 'lid', 'plural'),
    'foreign keys' => array(
      'locales_source' => array(
        'table' => 'locales_source',
        'columns' => array('lid' => 'lid'),
      ),
    ),
    'indexes' => array(
      'lid'      => array('lid'),
      'plid'     => array('plid'),
      'plural'   => array('plural'),
    ),
  );

  return $schema;
}

