<?php
/**
 * file contains systemChecker Class
 * @package Installer
 * @copyright Copyright 2003-2016 Zen Cart Development Team
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0
 * @version $Id: Author: DrByte  Tue Feb 16 17:44:40 2016 -0500 New in v1.5.5 $
 *
 */
/**
 *
 * systemChecker Class
 *
 */
class systemChecker
{
  public function __construct($selectedAdminDir = 'UNSPECIFIED')
  {
    $this->adminDirectoryList = self::getAdminDirectoryList();
    $res = sfYaml::load(DIR_FS_INSTALL . 'includes/systemChecks.yml');
    $this->systemChecks = $res['systemChecks'];
    $this->extraRunLevels = array();

    if ($selectedAdminDir == 'UNSPECIFIED' || $selectedAdminDir == '' || !file_exists(DIR_FS_ROOT . $selectedAdminDir))
    {
      if (count($this->adminDirectoryList) == 1) $selectedAdminDir = $this->adminDirectoryList[0];
    }
    $this->selectedAdminDir = $selectedAdminDir;
  }

  public function runTests($runLevel = 'always')
  {
    $runLevels = array_merge(array($runLevel), $this->extraRunLevels);
    $this -> errorList = array();
//    print_r($this->systemChecks);
    foreach ($this->systemChecks as $systemCheckName => $systemCheck)
    {
//      print_r($systemCheck);
      if (in_array($systemCheck['runLevel'], $runLevels))
      {
        $resultCombined = TRUE;
        $criticalError = false;
        foreach ($systemCheck['methods'] as $methodName => $methodDetail)
        {
          $this->localErrors = NULL;
          if (isset($methodDetail['method'])) $methodName = $methodDetail['method'];
          $result = $this -> {$methodName}($methodDetail['parameters']);
          $resultCombined &= $result;
          if ($result == false && (isset($this->systemChecks[$systemCheckName]['criticalError'])))
          {
            $criticalError = true;
          }
          $this->log($result, $methodName, $methodDetail);
          if (!$result)
          {
            if (isset($methodDetail['localErrorText']))
            {
              $systemCheck['extraErrors'][] = $methodDetail['localErrorText'];
            } elseif (isset($this->localErrors))
            {
              $systemCheck['extraErrors'][] = $this->localErrors;
            }
          }
        }
        if (!$resultCombined)
        {
          $this -> errorList[$systemCheckName] = $systemCheck;
        }
        if ($criticalError) break 1;
      }
    }
    return $this -> errorList;
  }

  public function getErrorList($condition = 'FAIL')
  {
    $result = FALSE;
    $resultList = array();
    foreach ($this->errorList as $entry)
    {
      if ($entry['errorLevel'] == $condition)
      {
        $result = TRUE;
        $resultList[] = $entry;
      }
    }
    return array($result, $resultList);
  }
  public function hasSaneConfigFile()
  {
    $result = FALSE;
    if ($this->getServerConfig()->fileLoaded())
    {
      $httpServerVal = $this->getServerConfig()->getDefine('HTTP_SERVER');
      $fsCatalogVal = $this->getServerConfig()->getDefine('DIR_FS_CATALOG');
      $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
      if ($httpServerVal != "" && $fsCatalogVal != "" && $dbUserVal != "")
      {
        $result = TRUE;
      }
    }
    return $result;
  }
  public function hasUpdatedConfigFile()
  {
    $result = FALSE;
    if ($this->getServerConfig()->fileLoaded())
    {

      // if the new var added in v160 is present, then this deems the file to be already updated
      $sessionStorage = $this->getServerConfig()->getDefine('SESSION_STORAGE');
      if (isset($sessionStorage))
      {
        $result = TRUE;
      }
    }
    return $result;
  }
  public function removeConfigureErrors()
  {
    $listFatalErrors = array();
    foreach ($this->errorList as $key => $value)
    {
      if ($key != 'checkStoreConfigureFile' && $key != 'checkAdminConfigureFile')
      {
        if ($value['errorLevel'] == 'FAIL') $listFatalErrors[$key] = $value;
      }
    }
    $hasFatalErrors = (count($listFatalErrors) > 0) ? TRUE : FALSE;
    return (array($hasFatalErrors, $listFatalErrors));
  }
  public function getDbConfigOptions()
  {
    $dbServerVal = $this->getServerConfig()->getDefine('DB_SERVER');
    $dbNameVal = $this->getServerConfig()->getDefine('DB_DATABASE');
    $dbPasswordVal = $this->getServerConfig()->getDefine('DB_SERVER_PASSWORD');
    $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
    $dbPrefixVal = $this->getServerConfig()->getDefine('DB_PREFIX');
    $dbCharsetVal = $this->getServerConfig()->getDefine('DB_CHARSET');
    $dbTypeVal = $this->getServerConfig()->getDefine('DB_TYPE');
    $retVal = array('db_host'=>$dbServerVal, 'db_user'=>$dbUserVal, 'db_password'=>$dbPasswordVal, 'db_name'=>$dbNameVal, 'db_charset'=>$dbCharsetVal, 'db_prefix'=>$dbPrefixVal, 'db_type'=>$dbTypeVal);
    return $retVal;
  }
  public function getServerConfig()
  {
    if(!isset($this->serverConfig)) {
      $this->serverConfig = new zcConfigureFileReader(DIR_FS_ROOT . 'includes/configure.php');
  }
    return $this->serverConfig;
  }
  public function findCurrentDbVersion()
  {
    foreach ($this->systemChecks as $systemCheckName => $systemCheck)
    {
      $version = NULL;
      if ($systemCheck['runLevel'] == 'dbVersion')
      {
        $resultCombined = TRUE;
        foreach ($systemCheck['methods'] as $methodName => $methodDetail)
        {
          if (isset($methodDetail['method'])) $methodName = $methodDetail['method'];
          $result = $this -> {$methodName}($methodDetail['parameters']);
          $resultCombined &= $result;
          if (!$result)
          {
            if (isset($methodDetail['localErrorText']))
            {
              $systemCheck['extraErrors'][] = $methodDetail['localErrorText'];
            }
          } else
          {
            $version = $systemCheck['version'];
            break;
          }
        }
        if (!$resultCombined)
        {
          $this -> errorList[] = $systemCheck;
        }
        if (isset($version)) break;
      }
    }
//    print_r($this->errorList);
    return $version;
  }
  public function dbVersionChecker($parameters)
  {
    if (function_exists('mysqli_connect')) {
    if (!$this->getServerConfig()->fileLoaded()) return FALSE;
    $dbServerVal = $this->getServerConfig()->getDefine('DB_SERVER');
    $dbNameVal = $this->getServerConfig()->getDefine('DB_DATABASE');
    $dbPasswordVal = $this->getServerConfig()->getDefine('DB_SERVER_PASSWORD');
    $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
    $dbPrefixVal = $this->getServerConfig()->getDefine('DB_PREFIX');
    require_once (DIR_FS_ROOT . 'includes/classes/db/mysql/query_factory.php');
    $db = new queryFactory();
    $result = $db -> simpleConnect($dbServerVal, $dbUserVal, $dbPasswordVal, $dbNameVal);
    if (!$result)
    {
      $systemCheck['extraErrors'][] = $db -> error_number . ':' . $db -> error_text;
    } else
    {
      $result = $db -> selectdb($dbNameVal, $db -> link);
    }
    if (!$result)
    {
      $systemCheck['extraErrors'][] = $db -> error_number . ':' . $db -> error_text;
    }
    if ($result == false) return $result;
    $valid = TRUE;
    foreach ($parameters as $parameter)
    {
      $method = 'dbVersionCheck' . ucfirst($parameter['checkType']);
      $result = $this->$method($db, $dbPrefixVal, $parameter);
//      echo $parameter['checkType'] . ': ' . var_export($result, true) . '<br>';
      $valid = $valid && $result;
    }
//    echo 'Valid: ' . var_export($valid, true) . '<br>';
    } else {
      $valid = false;
    }
    return $valid;
  }
  public function dbVersionCheckFieldSchema($db, $dbPrefix, $parameters)
  {
    $sql = "show fields from " . $dbPrefix . $parameters['tableName'];
    $result = $db->execute($sql);
    while (!$result->EOF)
    {
      // if found the specified field ...
      if  ($result->fields['Field'] == $parameters['fieldName'])
      {
        // then return true if the test was simply "Exists", or check that the field's type matches the fieldCheck test
        if ($parameters['fieldCheck'] == 'Exists' || strtoupper($result->fields[$parameters['fieldCheck']]) == $parameters['expectedResult'])
        {
          return true;
        }
      }
      $result->MoveNext();
    }
    return false;
  }
  public function dbVersionCheckConfigValue($db, $dbPrefix, $parameters)
  {
    $retVal = FALSE;
    $sql = "select configuration_title from " . $dbPrefix . "configuration where configuration_key = '" . $parameters['fieldName'] . "'";
    $result = $db->execute($sql);
    if ($result)
    {
      $retVal  = ($result->fields['configuration_title'] == $parameters['expectedResult']) ? TRUE : FALSE;
    }
    return $retVal;
  }
  public function dbVersionCheckConfigDescription($db, $dbPrefix, $parameters)
  {
    $retVal = FALSE;
    $sql = "select configuration_description from " . $dbPrefix . "configuration where configuration_key = '" . $parameters['fieldName'] . "'";
    $result = $db->execute($sql);
    if ($result)
    {
      $retVal  = ($result->fields['configuration_description'] == $parameters['expectedResult']) ? TRUE : FALSE;
    }
    return $retVal;
  }
  public function checkWriteableDir($parameters)
  {
    return is_writeable($parameters['fileDir']);
  }

  public function checkWriteableFile($parameters)
  {
    if (isset($parameters['changePerms']) &&  $parameters['changePerms'] !== FALSE)
    {
      if (file_exists($parameters['fileDir']))
      {
        @chmod($parameters['fileDir'], octdec($parameters['changePerms']));
      } else
      {
        if ($fp = @fopen($parameters['fileDir'], 'c'))
        {
          fclose($fp);
          chmod($parameters['fileDir'], octdec($parameters['changePerms']));
        }
      }
    }
    return (is_writeable($parameters['fileDir']));
  }
  public function checkWriteableAdminFile($parameters)
  {
    if (is_writeable(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir'])) return TRUE;
    if (!file_exists(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir']))
    {
      if ($fp = @fopen(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir'], 'c'))
      {
        fclose($fp);
      }
    }
    if (file_exists(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir']))
    {
      if (isset($parameters['changePerms']) &&  $parameters['changePerms'] !== FALSE)
      {
        @chmod(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir'], octdec($parameters['changePerms']));
      }
      if (is_writeable(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir'])) return TRUE;
    }
    logDetails(DIR_FS_ROOT . $this->selectedAdminDir . '/' . $parameters['fileDir'], 'ADMIN FILE TEST');
    return FALSE;
  }
  public function checkExtension($parameters)
  {
    return (extension_loaded($parameters['extension']));
  }
  public function checkFunctionExists($parameters)
  {
    return (function_exists($parameters['functionName']));
  }

  public function checkPhpVersion($parameters)
  {
    $result = version_compare(PHP_VERSION, $parameters['version'], $parameters['versionTest']);
    return $result;
  }

  public function checkHtaccessSupport($parameters)
  {
    $testPath = $_SERVER['HTTP_HOST'] . $_SERVER['SCRIPT_NAME'];
    $testPath = 'http://' . substr($testPath, 0, strpos($testPath, '/zc_install')) . '/includes/filenames.php';
    if (function_exists('curl_init'))
    {
      $resultCurl = self::curlGetUrl($testPath);
      if (isset($resultCurl['http_code']) && $resultCurl['http_code'] == '403')
      {
        $result = TRUE;
      } else
      {
        $result = FALSE;
      }

    } else
    {
      $result = TRUE;
    }
    return $result;
  }

  public function checkInitialSession($parameters)
  {
    session_name($parameters['sessionName']);
    $result = @session_start();
    if (!$result)
      RETURN FALSE;
//    if (defined('SID') && constant('SID') != "")
//      return FALSE;
//    if (session_status() == PHP_SESSION_DISABLED)
//      return FALSE;
    $_SESSION['testSession'] = 'testSession';
    return TRUE;
  }

  public function checkUpgradeDBConnection($parameters)
  {
    if (function_exists('mysqli_connect')) {
    $dbServerVal = $this->getServerConfig()->getDefine('DB_SERVER');
    $dbNameVal = $this->getServerConfig()->getDefine('DB_DATABASE');
    $dbPasswordVal = $this->getServerConfig()->getDefine('DB_SERVER_PASSWORD');
    $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
    require_once (DIR_FS_ROOT . 'includes/classes/db/mysql/query_factory.php');
    $db = new queryFactory();
    $result = $db -> simpleConnect($dbServerVal, $dbUserVal, $dbPasswordVal, $dbNameVal);
    if (!$result)
    {
      $this->localErrors = $db -> error_number . ':' . $db -> error_text;
    } else
    {
      $result = $db -> selectdb($dbNameVal, $db -> link);
    }
    if (!$result)
    {
      $this->localErrors = $db -> error_number . ':' . $db -> error_text;
    }
    } else {
      $result = false;
    }
    return $result;
  }
  public function checkDBConnection($parameters)
  {
    if (function_exists('mysqli_connect')) {
    $dbServerVal = $this->getServerConfig()->getDefine('DB_SERVER');
    $dbNameVal = $this->getServerConfig()->getDefine('DB_DATABASE');
    $dbPasswordVal = $this->getServerConfig()->getDefine('DB_SERVER_PASSWORD');
    $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
    require_once (DIR_FS_ROOT . 'includes/classes/db/mysql/query_factory.php');
    $db = new queryFactory();
    $result = @$db -> simpleConnect($dbServerVal, $dbUserVal, $dbPasswordVal, $dbNameVal);
    if ($db->error_number != '2002')
    {
      $result = TRUE;
    }
    } else {
      $result = false;
    }
    return $result;
  }
  public function checkNewDBConnection($parameters)
  {
    require_once (DIR_FS_ROOT . 'includes/classes/db/mysql/query_factory.php');
    $db = new queryFactory();
    $result = $db -> simpleConnect(zcRegistry::getValue('db_host'), zcRegistry::getValue('db_user'), zcRegistry::getValue('db_password'), zcRegistry::getValue('db_name'));
    if (!$result)
    {
      $this->localErrors = $db -> error_number . ':' . $db -> error_text;
    } else
    {
      $result = $db -> selectdb(zcRegistry::getValue('db_name'), $db -> link);
      if (!$result)
      {
        $sql = "CREATE DATABASE " . zcRegistry::getValue('db_name') . " CHARACTER SET " . zcRegistry::getValue('db_charset');
       $result = $db -> execute($sql);
       if ($result)
        {
          return TRUE;
       } else
        {
          $this->localErrors = $db -> error_number . ':' . $db -> error_text;
       }
      }
    }
    return $result;
  }
  public function checkIniGet($parameters)
  {
    $result = @ini_get($parameters['inigetName']);
    return ($result != $parameters['expectedValue']) ? FALSE : TRUE;
  }
  public function checkLiveCurl($parameters)
  {
    if (function_exists('curl_init'))
    {
      $url = (!preg_match('~^http?s:.*~i', $parameters['testUrl'])) ? 'http://' . $parameters['testUrl'] : $parameters['testUrl'];
      $data = $parameters['testData'];
      $ch = curl_init();
// error_log('CURL Test URL: ' . $url);
      curl_setopt($ch, CURLOPT_URL, $url);
      curl_setopt($ch, CURLOPT_VERBOSE, 0);
//       curl_setopt($ch, CURLOPT_POST, 1);
//       curl_setopt($ch, CURLOPT_POSTFIELDS, $data);
      curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
      curl_setopt($ch, CURLOPT_TIMEOUT, 11);
      curl_setopt($ch, CURLOPT_CONNECTTIMEOUT, 10);
      curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE); // This is intentionally set to FALSE within zc_install since this test is not about whether certificates are good.
      $result = curl_exec($ch);
      $errtext = curl_error($ch);
      $errnum = curl_errno($ch);
      $commInfo = @curl_getinfo($ch);
// error_log('CURL Connect: ' . $errnum . ' ' . $errtext . "\n" . print_r($commInfo, TRUE));
// error_log('CURL Response: ' . $result);
      curl_close ($ch);
       if ($errnum != 0 || trim($result) != 'PASS')
      {
        return FALSE;
      } else
      {
        return TRUE;
      }
    } else
    {
      return FALSE;
    }
  }
  public function checkHttpsRequest($parameters)
  {
    global $request_type;

    // Take full URI and ping https version of same to see if expected response comes back. If so, redirect install to https.
    // In case multiple-redirects happen on oddly-configured hosts, this can be bypassed by adding ?noredirect=1 to the URL
    if ($request_type != 'SSL' && function_exists('curl_init') && !isset($_GET['noredirect']))
    {
      $test_uri = 'https://' . str_replace(array('http://', 'https://'), '', $_SERVER['HTTP_HOST'] . $_SERVER['REQUEST_URI']);
      $resultCurl = self::curlGetUrl($test_uri);
      //error_log(print_r($resultCurl, true) . print_r($_SERVER, true));
      if (isset($resultCurl['http_code']) && $resultCurl['http_code'] == '200') {
        header('Location: ' . $test_uri);
        exit();
      }
    }
    // otherwise, return the https status so the inspector can report it along with suggestions
    return ($request_type == 'SSL') ? TRUE : FALSE;
  }
  public function addRunlevel($runLevel)
  {
    $this->extraRunLevels[] = $runLevel;
  }
  public function validateAdminCredentials($adminUser, $adminPassword)
  {
    $parameters = array(array('checkType'=>'fieldSchema', 'tableName'=>'admin', 'fieldName'=>'admin_profile', 'fieldCheck'=>'Type', 'expectedResult'=>'INT(11)'));
    $hasAdminProfiles = $this->dbVersionChecker($parameters);
    $dbServerVal = $this->getServerConfig()->getDefine('DB_SERVER');
    $dbNameVal = $this->getServerConfig()->getDefine('DB_DATABASE');
    $dbPasswordVal = $this->getServerConfig()->getDefine('DB_SERVER_PASSWORD');
    $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
    $dbPrefixVal = $this->getServerConfig()->getDefine('DB_PREFIX');
    require_once (DIR_FS_ROOT . 'includes/classes/db/mysql/query_factory.php');
    $db = new queryFactory();
    $result = $db -> simpleConnect($dbServerVal, $dbUserVal, $dbPasswordVal, $dbNameVal);
    if (!$result)
    {
      $systemCheck['extraErrors'][] = $db -> error_number . ':' . $db -> error_text;
    } else
    {
      $result = $db -> selectdb($dbNameVal, $db -> link);
    }
    if (!$result)
    {
      $systemCheck['extraErrors'][] = $db -> error_number . ':' . $db -> error_text;
    }
    if ($result == false) return $result;
//    echo ($hasAdminProfiles) ? 'YES' : 'NO';
    if (!$hasAdminProfiles)
    {
      $sql = "select admin_id, admin_name, admin_pass from " . $dbPrefixVal . "admin where admin_name = '" . $adminUser . "'";
      $result = $db->execute($sql);
      if ($result->EOF || $adminUser != $result->fields['admin_name'] || !zen_validate_password($adminPassword, $result->fields['admin_pass']))
      {
        return false;
      } else
      {
        return $result->fields['admin_id'];
      }
    } else
    {
      // first check if the table has any superusers; if not, verify the user's password and assign them as a superuser
      $sql = "select distinct(admin_profile)
              from " . $dbPrefixVal . "admin
              order by admin_profile";
      $result = $db->execute($sql);
      if ($result->EOF || ($result->RecordCount() == 1 && $result->fields['admin_profile'] == 0))
      {
        $sql = "select admin_id, admin_name, admin_pass
              from " . $dbPrefixVal . "admin
              where admin_name = '" . $adminUser . "'";
        $result = $db->execute($sql);
        if (!$result->EOF && zen_validate_password($adminPassword, $result->fields['admin_pass']))
        {
          $sql = "update " . $dbPrefixVal . "admin
                  set admin_profile = 1
                  where admin_id = " . $result->fields['admin_id'];
          $db->execute($sql);
          return $result->fields['admin_id'];
        }
      } else {

        $sql = "select a.admin_id, a.admin_name, a.admin_pass, a.admin_profile
                from " . $dbPrefixVal . "admin as a
                left join " . $dbPrefixVal . "admin_profiles as ap on a.admin_profile = ap.profile_id
                where a.admin_name = '" . $adminUser . "'
                and ap.profile_name = 'Superuser'";
        $result = $db->execute($sql);
        if ($result->EOF || !zen_validate_password($adminPassword, $result->fields['admin_pass'])) {
          return false;
        }
        return $result->fields['admin_id'];
      }
    }
    return false;
  }

  function curlGetUrl( $url )
  {
    $options = array(
        CURLOPT_RETURNTRANSFER => true,     // return web page
        CURLOPT_HEADER         => false,    // don't return headers
        CURLOPT_FOLLOWLOCATION => false,    // follow redirects
        CURLOPT_ENCODING       => "",       // handle all encodings
        CURLOPT_AUTOREFERER    => true,     // set referer on redirect
        CURLOPT_CONNECTTIMEOUT => 120,      // timeout on connect
        CURLOPT_TIMEOUT        => 120,      // timeout on response
        CURLOPT_MAXREDIRS      => 10,       // stop after 10 redirects
    );

    $ch      = curl_init( $url );
    curl_setopt_array( $ch, $options );
    $content = curl_exec( $ch );
    $err     = curl_errno( $ch );
    $errmsg  = curl_error( $ch );
    $header  = curl_getinfo( $ch );
    curl_close( $ch );

    $header['errno']   = $err;
    $header['errmsg']  = $errmsg;
    $header['content'] = $content;
    return $header;
  }
  static function getAdminDirectoryList()
  {
    $adminDirectoryList = array();

    $ignoreArray = array('.', '..', 'cache', 'logs', 'installer', 'zc_install', 'includes', 'testFramework', 'editors', 'extras', 'images', 'docs', 'pub', 'email', 'download', 'media');
    $d = @dir(DIR_FS_ROOT);
    while (false !== ($entry = $d->read())) {
      if (is_dir(DIR_FS_ROOT . $entry) && !in_array($entry, $ignoreArray))
      {
        if (file_exists(DIR_FS_ROOT . $entry . '/' . 'banner_manager.php'))
        {
          $adminDirectoryList[] = $entry;
        }
      }
    }
    return $adminDirectoryList;
  }
  function backupConfigureFiles($parameters)
  {
    return TRUE;
  }
  function log($result, $methodName, $methodDetail)
  {
    if (VERBOSE_SYSTEMCHECKER == 'screen' || VERBOSE_SYSTEMCHECKER === TRUE || VERBOSE_SYSTEMCHECKER == 'TRUE')
    {
      echo $methodName . "<br>";
      foreach ($methodDetail['parameters'] as $key=>$value)
      {
        echo $key . " : " . $value . "<br>";
      }
      echo (($result == 1) ? 'PASSED' : 'FAILED') . "<br>";
      echo "------------------<br><br>";
    }
    if (!in_array(VERBOSE_SYSTEMCHECKER, array('silent', 'none', 'off', 'OFF', 'NONE', 'SILENT')))
    {
      logDetails((($result == 1) ? 'PASSED' : 'FAILED') . substr(print_r($methodDetail['parameters'], TRUE), 5), $methodName);
    }
  }
  function checkIsZCVersionCurrent()
  {
    $new_version = TEXT_VERSION_CHECK_CURRENT; //set to "current" by default
    $lines = @file(NEW_VERSION_CHECKUP_URL . '?v='.PROJECT_VERSION_MAJOR.'.'.PROJECT_VERSION_MINOR.'&p='.PHP_VERSION.'&a='.$_SERVER['SERVER_SOFTWARE'].'&r='.urlencode($_SERVER['HTTP_HOST']).'&m=zc_install');
    //check for major/minor version info
    if ((trim($lines[0]) > PROJECT_VERSION_MAJOR) || (trim($lines[0]) == PROJECT_VERSION_MAJOR && trim($lines[1]) > PROJECT_VERSION_MINOR)) {
      $new_version = TEXT_VERSION_CHECK_NEW_VER . trim($lines[0]) . '.' . trim($lines[1]) . ' :: ' . $lines[2];
    }
    //check for patch version info
    // first confirm that we're at latest major/minor -- otherwise no need to check patches:
    if (trim($lines[0]) == PROJECT_VERSION_MAJOR && trim($lines[1]) == PROJECT_VERSION_MINOR) {
    //check to see if either patch needs to be applied
      if (trim($lines[3]) > intval(PROJECT_VERSION_PATCH1) || trim($lines[4]) > intval(PROJECT_VERSION_PATCH2)) {
      // reset update message, since we WILL be advising of an available upgrade
        if ($new_version == TEXT_VERSION_CHECK_CURRENT) $new_version = '';
        //check for patch #1
        if (trim($lines[3]) > intval(PROJECT_VERSION_PATCH1)) {
        // if ($new_version != '') $new_version .= '<br />';
          $new_version .= (($new_version != '') ? '<br />' : '') . '<span class="alert">' . TEXT_VERSION_CHECK_NEW_PATCH . trim($lines[0]) . '.' . trim($lines[1]) . ' - ' .TEXT_VERSION_CHECK_PATCH .': [' . trim($lines[3]) . '] :: ' . $lines[5] . '</span>';
        }
        if (trim($lines[4]) > intval(PROJECT_VERSION_PATCH2)) {
        // if ($new_version != '') $new_version .= '<br />';
          $new_version .= (($new_version != '') ? '<br />' : '') . '<span class="alert">' . TEXT_VERSION_CHECK_NEW_PATCH . trim($lines[0]) . '.' . trim($lines[1]) . ' - ' .TEXT_VERSION_CHECK_PATCH .': [' . trim($lines[4]) . '] :: ' . $lines[5] . '</span>';
        }
      }
    }
    // prepare displayable download link
    if ($new_version != '' && $new_version != TEXT_VERSION_CHECK_CURRENT) {
      $new_version .= '<a href="' . $lines[6] . '" target="_blank">'. TEXT_VERSION_CHECK_DOWNLOAD .'</a>';
      $this->localErrors = $new_version;
      return FALSE;
    }
    return TRUE;
  }
  /**
   * add current user IP to allowed-in-maintenance list
   */
  public function updateAdminIpList() {
    if (isset($_SERVER['REMOTE_ADDR']) && strlen($_SERVER['REMOTE_ADDR']) > 4) {
      $checkip = $_SERVER['REMOTE_ADDR'];

      $dbServerVal = $this->getServerConfig()->getDefine('DB_SERVER');
      $dbNameVal = $this->getServerConfig()->getDefine('DB_DATABASE');
      $dbPasswordVal = $this->getServerConfig()->getDefine('DB_SERVER_PASSWORD');
      $dbUserVal = $this->getServerConfig()->getDefine('DB_SERVER_USERNAME');
      $dbPrefixVal = $this->getServerConfig()->getDefine('DB_PREFIX');
      require_once (DIR_FS_ROOT . 'includes/classes/db/mysql/query_factory.php');
      $db = new queryFactory();
      $result = $db -> simpleConnect($dbServerVal, $dbUserVal, $dbPasswordVal, $dbNameVal);
      $result = $db -> selectdb($dbNameVal, $db -> link);

      $sql = "select configuration_value from " . $dbPrefixVal . "configuration where configuration_key = 'EXCLUDE_ADMIN_IP_FOR_MAINTENANCE'";
      $result = $db->Execute($sql);
      if (!strstr($result->fields['configuration_value'], $checkip)) {
        $newip = $result->fields['configuration_value'] . ',' . $checkip;
        $sql = "update " . $dbPrefixVal . "configuration set configuration_value = '" . $db->prepare_input($newip) . "' where configuration_key = 'EXCLUDE_ADMIN_IP_FOR_MAINTENANCE'";
        $db->Execute($sql);
      }
    }
  }
}
