<?php

/**
 * @file
 * Rules i18n integration.
 */

/**
 * Implements hook_menu().
 */
function rules_i18n_rules_ui_menu_alter(&$items, $base_path, $base_count) {

  $items[$base_path . '/manage/%rules_config/edit'] = array(
    'title' => 'Edit',
    'type' => MENU_DEFAULT_LOCAL_TASK,
    'weight' => -100,
  );

  // For reaction-rules i18n generates the menu items, for the others we provide
  // further i18n menu items for all other base paths.

  if ($base_path != 'admin/config/workflow/rules/reaction') {

    $items[$base_path . '/manage/%rules_config/translate'] = array(
      'title' => 'Translate',
      'page callback' => 'i18n_page_translate_localize',
      'page arguments' => array('rules_config', $base_count + 1),
      'access callback' => 'i18n_object_translate_access',
      'access arguments' => array('rules_config', $base_count + 1),
      'type' => MENU_LOCAL_TASK,
      'file' => 'i18n.pages.inc',
      'file path' => drupal_get_path('module', 'i18n'),
      'weight' => 10,
    );

    $items[$base_path . '/manage/%rules_config/translate/%i18n_language'] = array(
      'title' => 'Translate',
      'page callback' => 'i18n_page_translate_localize',
      'page arguments' => array('rules_config', $base_count + 1, $base_count + 3),
      'access callback' => 'i18n_object_translate_access',
      'access arguments' => array('rules_config', $base_count),
      'type' => MENU_CALLBACK,
      'file' => 'i18n.pages.inc',
      'file path' => drupal_get_path('module', 'i18n'),
      'weight' => 10,
    );
  }
}

/**
 * Implements hook_entity_info_alter().
 */
function rules_i18n_entity_info_alter(&$info) {
  // Enable i18n support via the entity API.
  $info['rules_config']['i18n controller class'] = 'RulesI18nStringController';
}

/**
 * Implements hook_rules_config_insert().
 */
function rules_i18n_rules_config_insert($rules_config) {
  // Do nothing when rebuilding defaults to avoid multiple cache rebuilds.
  // @see rules_i18n_rules_config_defaults_rebuild()
  if (!empty($rules_config->is_rebuild)) {
    return;
  }

  i18n_string_object_update('rules_config', $rules_config);
}

/**
 * Implements hook_rules_config_update().
 */
function rules_i18n_rules_config_update($rules_config, $original = NULL) {
  // Do nothing when rebuilding defaults to avoid multiple cache rebuilds.
  // @see rules_i18n_rules_config_defaults_rebuild()
  if (!empty($rules_config->is_rebuild)) {
    return;
  }
  $original = $original ? $original : $rules_config->original;

  // Account for name changes.
  if ($original->name != $rules_config->name) {
    i18n_string_update_context("rules:rules_config:{$original->name}:*", "rules:rules_config:{$rules_config->name}:*");
  }

  // We need to remove the strings of any disappeared properties, i.e. strings
  // from translatable parameters of deleted actions.

  // i18n_object() uses a static cache per config, so bypass it to wrap the
  // original entity.
  $object_key = i18n_object_key('rules_config', $original);
  $old_i18n_object = new RulesI18nStringObjectWrapper('rules_config', $object_key, $original);
  $old_strings = $old_i18n_object->get_strings(array('empty' => TRUE));

  // Note: For the strings to have updated values, the updated entity needs to
  // be handled last due to i18n's cache.
  $strings = i18n_object('rules_config', $rules_config)->get_strings(array('empty' => TRUE));

  foreach (array_diff_key($old_strings, $strings) as $name => $string) {
    $string->remove(array('empty' => TRUE));
  }
  // Now update the remaining strings.
  foreach ($strings as $string) {
    $string->update(array('empty' => TRUE, 'update' => TRUE));
  }
}

/**
 * Implements hook_rules_config_delete().
 */
function rules_i18n_rules_config_delete($rules_config) {
  // Only react on real delete, not revert.
  if (!$rules_config->hasStatus(ENTITY_IN_CODE)) {
    i18n_string_object_remove('rules_config', $rules_config);
  }
}

/**
 * Implements hook_rules_config_defaults_rebuild().
 */
function rules_i18n_rules_config_defaults_rebuild($rules_configs, $originals) {
  // Once all defaults have been rebuilt, update all i18n strings at once. That
  // way we build the rules cache once the rebuild is complete and avoid
  // rebuilding caches for each updated rule.
  foreach ($rules_configs as $name => $rule_config) {
    if (empty($originals[$name])) {
      rules_i18n_rules_config_insert($rule_config);
    }
    else {
      rules_i18n_rules_config_update($rule_config, $originals[$name]);
    }
  }
}