<?php
function run_0013() {
  // Ugly but haven't found a better way
  global $setting, $config, $user, $mysqli;

  // Version information
  $db_version_old = '0.0.12';  // What version do we expect
  $db_version_new = '0.0.13';  // What is the new version we wish to upgrade to
  $db_version_now = $setting->getValue('DB_VERSION');  // Our actual version installed

  // Upgrade specific variables
  $aSql[] = "CREATE TABLE `statistics_users` (
    `id` int(11) NOT NULL AUTO_INCREMENT,
    `account_id` int(11) NOT NULL,
    `hashrate` int(11) NOT NULL,
    `workers` int(11) NOT NULL,
    `sharerate` float NOT NULL,
    `timestamp` int(11) NOT NULL,
    PRIMARY KEY (`id`),
    KEY `account_id_timestamp` (`account_id`,`timestamp`)
    ) ENGINE=InnoDB DEFAULT CHARSET=utf8";
  $aSql[] = "UPDATE " . $setting->getTableName() . "    SET value = '0.0.13' WHERE name = 'DB_VERSION'";

  if ($db_version_now == $db_version_old && version_compare($db_version_now, DB_VERSION, '<')) {
    // Run the upgrade
    echo '- Starting database migration to version ' . $db_version_new . PHP_EOL;
    foreach ($aSql as $sql) {
      echo '-  Preparing: ' . $sql . PHP_EOL;
      $stmt = $mysqli->prepare($sql);
      if ($stmt && $stmt->execute()) {
        echo '-    success' . PHP_EOL;
      } else {
        echo '-    failed: ' . $mysqli->error . PHP_EOL;
        exit(1);
      }
    }
  }
}
?>