<?php

/**
 * @file
 * Installation file for Internationalization (i18n) module.
 */

/**
 * Implementation of hook_schema().
 */
function i18n_schema() {
  $schema['i18n_variable'] = array(
    'description' => 'Multilingual variables.',
    'fields' => array(
      'name' => array(
        'description' => 'The name of the variable.',
        'type' => 'varchar',
        'length' => 128,
        'not null' => TRUE,
        'default' => ''),
      'language' => array(
        'description' => 'The language of the variable.',
        'type' => 'varchar',
        'length' => 12,
        'not null' => TRUE,
        'default' => ''),
      'value' => array(
        'description' => 'The value of the variable.',
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big'),
      ),
    'primary key' => array('name', 'language'),
    );
  return $schema;
}

/**
 * Set language field in its own table
 * Do not drop node.language now, just in case
 * TO-DO: Drop old tables, fields
 */
function i18n_install() {
  // Create database tables
  drupal_install_schema('i18n');
  // Set module weight for it to run after core modules
  db_query("UPDATE {system} SET weight = 10 WHERE name = 'i18n' AND type = 'module'");
}

function i18n_uninstall() {
  drupal_uninstall_schema('i18n');

  variable_del('i18n_hide_translation_links');
  variable_del('i18n_selection_mode');
  foreach (array_keys(node_get_types()) as $type) {
    variable_del('i18n_node_'. $type);
  }
}

/**
 * Drupal 6 upgrade. I have started with the wrong numbering, cannot change it now.
 */
function i18n_update_9() {
  // Update content type settings
  foreach (array_keys(node_get_types()) as $type) {
    if (variable_get('i18n_node_'. $type, 0)) {
      variable_set('language_content_type_'. $type, TRANSLATION_ENABLED);
    }
  }
  // General language settings
  if (variable_get('i18n_browser', 0)) {
    variable_set('language_negotiation', LANGUAGE_NEGOTIATION_PATH);
  }
  else {
    variable_set('language_negotiation', LANGUAGE_NEGOTIATION_PATH_DEFAULT);
  }
  // Set module weight for it to run after core modules
  $items[] = update_sql("UPDATE {system} SET weight = 10 WHERE name = 'i18n' AND type = 'module'");

  switch ($GLOBALS['db_type']) {
    case 'mysql':
    case 'mysqli':
      // Move node language and trid into node table
      $items[] = update_sql("UPDATE {node} n INNER JOIN {i18n_node} i ON n.nid = i.nid SET n.language = i.language, n.tnid = i.trid");
      // Upgrade tnid's so they match one of the nodes nid's to avoid
      // future conflicts when translating existing nodes
      $items[] = update_sql("UPDATE {node} n SET n.tnid = (SELECT MIN(i.nid) FROM {i18n_node} i WHERE i.trid = n.tnid) WHERE n.tnid > 0");
      break;
    case 'pgsql':
      // Move node language and trid into node table
      $items[] = update_sql("UPDATE {node} SET language = {i18n_node}.language, tnid = {i18n_node}.trid FROM {i18n_node} WHERE {node}.nid = {i18n_node}.nid");
      // Upgrade tnid's so they match one of the nodes nid's to avoid
      // future conflicts when translating existing nodes
      $items[] = update_sql("UPDATE {node} SET tnid = (SELECT MIN(i.nid) FROM {i18n_node} i WHERE i.trid = {node}.tnid) WHERE tnid > 0");
  }
  
  return $items;
}

/**
 * Drupal 6 clean up. To uncomment after making sure all previous updates work
 */
/*
function i18n_update_10() {
  // Drop old tables
  $items[] = update_sql("DROP TABLE {i18n_node}");

  // Delete variables. Most settings will be now handled by Drupal core.
  variable_del('i18n_allow');
  variable_del('i18n_browser');
  variable_del('i18n_content');
  variable_del('i18n_keep');
  variable_del('i18n_multi');
  variable_del('i18n_interface');
  variable_del('i18n_default');
  variable_del('i18n_supported_langs');
  variable_del('i18n_translation_links');
  variable_del('i18n_translation_node_links');
  return $items;
}*/