<?php

/**
 * @file
 * Install, update and uninstall functions for the uc_credit module.
 *
 * This is mostly legacy code now.
 */

/**
 * Implements hook_uninstall().
 */
function uc_credit_uninstall() {
  db_delete('variable')
    ->condition('name', 'uc_credit_%', 'LIKE')
    ->execute();
}

/**
 * Implements hook_update_last_removed().
 */
function uc_credit_update_last_removed() {
  // 7.x-3.0-beta2 and earlier were installed with schema version 0,
  // which causes update.php to fail.
  return drupal_get_installed_schema_version('uc_credit') == 0 ? 0 : 6000;
}

/**
 * Remove credit card debug mode.
 */
function uc_credit_update_7000(&$sandbox) {
  drupal_load('module', 'uc_credit');
  module_load_include('inc', 'uc_store', 'classes/encrypt');

  if (!isset($sandbox['progress'])) {
    $sandbox['progress'] = 0;
    $sandbox['current_order_id'] = 0;
    $sandbox['max'] = db_query("SELECT COUNT(order_id) FROM {uc_orders} WHERE data LIKE '%cc_data%'")->fetchField();
  }

  $t = get_t();
  $limit = 100;
  $crypt = new UbercartEncryption();
  $key = uc_credit_encryption_key();

  // Truncate stored data from debug mode.
  $result = db_query_range("SELECT order_id, data FROM {uc_orders} WHERE order_id > :current AND data LIKE '%cc_data%' ORDER BY order_id", 0, $limit, array(':current' => $sandbox['current_order_id']));
  while ($order = $result->fetchObject()) {
    $sandbox['current_order_id'] = $order->order_id;

    // Load up the existing data array.
    $data = unserialize($order->data);
    $cc_data = uc_credit_cache('save', $data['cc_data']);

    // Save only some limited, PCI compliant data.
    $cc_data['cc_number'] = substr($cc_data['cc_number'], -4);
    unset($cc_data['cc_cvv']);

    // Stuff the serialized and encrypted CC details into the array.
    $data['cc_data'] = $crypt->encrypt($key, base64_encode(serialize($cc_data)));

    // Save it again.
    db_update('uc_orders')
      ->fields(array('data' => serialize($data)))
      ->condition('order_id', $order->order_id)
      ->execute();

    $sandbox['progress']++;
    $sandbox['message'] = $t('Scrubbed credit card data from order @order_id', array('@order_id' => $order->order_id));
  }

  if ($sandbox['progress'] < $sandbox['max']) {
    $sandbox['#finished'] = min(0.99, $sandbox['progress'] / $sandbox['max']);
  }
  else {
    $sandbox['#finished'] = 1;

    variable_del('uc_credit_checkout_process');
    variable_del('uc_credit_debug');
    variable_del('uc_credit_clear_status');
    variable_del('uc_credit_number_duration');
    variable_del('uc_credit_number_unit');
  }
}