Move rcube_installer class to include/rcmail_installer in order to remain accessible by the update script even if the installer directory was removed

1 files changed, 832 insertions, 0 deletions

diff --git a/program/include/rcmail_install.php b/program/include/rcmail_install.php
new file mode 100644
index 000000000..ca06f10b7
--- /dev/null
+++ b/program/include/rcmail_install.php
@@ -0,0 +1,832 @@
+<?php
+
+/*
+ +-----------------------------------------------------------------------+
+ | rcmail_install.php                                                    |
+ |                                                                       |
+ | This file is part of the Roundcube Webmail package                    |
+ | Copyright (C) 2008-2014, The Roundcube Dev Team                       |
+ |                                                                       |
+ | Licensed under the GNU General Public License version 3 or            |
+ | any later version with exceptions for skins & plugins.                |
+ | See the README file for a full license statement.                     |
+ +-----------------------------------------------------------------------+
+*/
+
+
+/**
+ * Class to control the installation process of the Roundcube Webmail package
+ *
+ * @category Install
+ * @package  Roundcube
+ * @author Thomas Bruederli
+ */
+class rcmail_install
+{
+  var $step;
+  var $is_post = false;
+  var $failures = 0;
+  var $config = array();
+  var $configured = false;
+  var $legacy_config = false;
+  var $last_error = null;
+  var $email_pattern = '([a-z0-9][a-z0-9\-\.\+\_]*@[a-z0-9]([a-z0-9\-][.]?)*[a-z0-9])';
+  var $bool_config_props = array();
+
+  var $local_config = array('db_dsnw', 'default_host', 'support_url', 'des_key', 'plugins');
+  var $obsolete_config = array('db_backend', 'db_max_length', 'double_auth');
+  var $replaced_config = array(
+    'skin_path'            => 'skin',
+    'locale_string'        => 'language',
+    'multiple_identities'  => 'identities_level',
+    'addrbook_show_images' => 'show_images',
+    'imap_root'            => 'imap_ns_personal',
+    'pagesize'             => 'mail_pagesize',
+    'top_posting'          => 'reply_mode',
+    'keep_alive'           => 'refresh_interval',
+    'min_keep_alive'       => 'min_refresh_interval',
+  );
+
+  // list of supported database drivers
+  var $supported_dbs = array(
+    'MySQL'               => 'pdo_mysql',
+    'PostgreSQL'          => 'pdo_pgsql',
+    'SQLite'              => 'pdo_sqlite',
+    'SQLite (v2)'         => 'pdo_sqlite2',
+    'SQL Server (SQLSRV)' => 'pdo_sqlsrv',
+    'SQL Server (DBLIB)'  => 'pdo_dblib',
+  );
+
+
+  /**
+   * Constructor
+   */
+  function __construct()
+  {
+    $this->step = intval($_REQUEST['_step']);
+    $this->is_post = $_SERVER['REQUEST_METHOD'] == 'POST';
+  }
+
+  /**
+   * Singleton getter
+   */
+  static function get_instance()
+  {
+    static $inst;
+
+    if (!$inst)
+      $inst = new rcmail_install();
+
+    return $inst;
+  }
+
+  /**
+   * Read the local config files and store properties
+   */
+  function load_config()
+  {
+    // defaults
+    if ($config = $this->load_config_file(RCUBE_CONFIG_DIR . 'defaults.inc.php')) {
+        $this->config = (array) $config;
+        $this->defaults = $this->config;
+    }
+
+    $config = null;
+
+    // config
+    if ($config = $this->load_config_file(RCUBE_CONFIG_DIR . 'config.inc.php')) {
+        $this->config = array_merge($this->config, $config);
+    }
+    else {
+      if ($config = $this->load_config_file(RCUBE_CONFIG_DIR . 'main.inc.php')) {
+        $this->config = array_merge($this->config, $config);
+        $this->legacy_config = true;
+      }
+      if ($config = $this->load_config_file(RCUBE_CONFIG_DIR . 'db.inc.php')) {
+        $this->config = array_merge($this->config, $config);
+        $this->legacy_config = true;
+      }
+    }
+
+    $this->configured = !empty($config);
+  }
+
+  /**
+   * Read the default config file and store properties
+   */
+  public function load_config_file($file)
+  {
+    if (is_readable($file)) {
+      include $file;
+
+      // read comments from config file
+      if (function_exists('token_get_all')) {
+        $tokens = token_get_all(file_get_contents($file));
+        $in_config = false;
+        $buffer = '';
+        for ($i=0; $i < count($tokens); $i++) {
+          $token = $tokens[$i];
+          if ($token[0] == T_VARIABLE && $token[1] == '$config' || $token[1] == '$rcmail_config') {
+            $in_config = true;
+            if ($buffer && $tokens[$i+1] == '[' && $tokens[$i+2][0] == T_CONSTANT_ENCAPSED_STRING) {
+              $propname = trim($tokens[$i+2][1], "'\"");
+              $this->comments[$propname] = $buffer;
+              $buffer = '';
+              $i += 3;
+            }
+          }
+          else if ($in_config && $token[0] == T_COMMENT) {
+            $buffer .= strtr($token[1], array('\n' => "\n"));
+          }
+        }
+      }
+
+      // deprecated name of config variable
+      if (is_array($rcmail_config)) {
+        return $rcmail_config;
+      }
+
+      return $config;
+    }
+  }
+
+  /**
+   * Getter for a certain config property
+   *
+   * @param string Property name
+   * @param string Default value
+   * @return string The property value
+   */
+  function getprop($name, $default = '')
+  {
+    $value = $this->config[$name];
+
+    if ($name == 'des_key' && !$this->configured && !isset($_REQUEST["_$name"]))
+      $value = self::random_key(24);
+
+    return $value !== null && $value !== '' ? $value : $default;
+  }
+
+
+  /**
+   * Create configuration file that contains parameters
+   * that differ from default values.
+   *
+   * @return string The complete config file content
+   */
+  function create_config()
+  {
+    $config = array();
+
+    foreach ($this->config as $prop => $default) {
+      $is_default = !isset($_POST["_$prop"]);
+      $value      = !$is_default || $this->bool_config_props[$prop] ? $_POST["_$prop"] : $default;
+
+      // always disable installer
+      if ($prop == 'enable_installer')
+        $value = false;
+
+      // reset useragent to default (keeps version up-to-date)
+      if ($prop == 'useragent' && stripos($value, 'Roundcube Webmail/') !== false)
+        $value = $this->defaults[$prop];
+
+      // generate new encryption key, never use the default value
+      if ($prop == 'des_key' && $value == $this->defaults[$prop])
+        $value = $this->random_key(24);
+
+      // convert some form data
+      if ($prop == 'debug_level' && !$is_default) {
+        if (is_array($value)) {
+          $val = 0;
+          foreach ($value as $dbgval)
+            $val += intval($dbgval);
+          $value = $val;
+        }
+      }
+      else if ($prop == 'db_dsnw' && !empty($_POST['_dbtype'])) {
+        if ($_POST['_dbtype'] == 'sqlite')
+          $value = sprintf('%s://%s?mode=0646', $_POST['_dbtype'], $_POST['_dbname']{0} == '/' ? '/' . $_POST['_dbname'] : $_POST['_dbname']);
+        else if ($_POST['_dbtype'])
+          $value = sprintf('%s://%s:%s@%s/%s', $_POST['_dbtype'], 
+            rawurlencode($_POST['_dbuser']), rawurlencode($_POST['_dbpass']), $_POST['_dbhost'], $_POST['_dbname']);
+      }
+      else if ($prop == 'smtp_auth_type' && $value == '0') {
+        $value = '';
+      }
+      else if ($prop == 'default_host' && is_array($value)) {
+        $value = self::_clean_array($value);
+        if (count($value) <= 1)
+          $value = $value[0];
+      }
+      else if ($prop == 'mail_pagesize' || $prop == 'addressbook_pagesize') {
+        $value = max(2, intval($value));
+      }
+      else if ($prop == 'smtp_user' && !empty($_POST['_smtp_user_u'])) {
+        $value = '%u';
+      }
+      else if ($prop == 'smtp_pass' && !empty($_POST['_smtp_user_u'])) {
+        $value = '%p';
+      }
+      else if (is_bool($default)) {
+        $value = (bool)$value;
+      }
+      else if (is_numeric($value)) {
+        $value = intval($value);
+      }
+
+      // skip this property
+      if (($value == $this->defaults[$prop]) && !in_array($prop, $this->local_config)
+          || in_array($prop, array_merge($this->obsolete_config, array_keys($this->replaced_config)))
+          || preg_match('/^db_(table|sequence)_/', $prop)) {
+        continue;
+      }
+
+      // save change
+      $this->config[$prop] = $value;
+      $config[$prop] = $value;
+    }
+
+    $out = "<?php\n\n";
+    $out .= "/* Local configuration for Roundcube Webmail */\n\n";
+    foreach ($config as $prop => $value) {
+      // copy option descriptions from existing config or defaults.inc.php
+      $out .= $this->comments[$prop];
+      $out .= "\$config['$prop'] = " . self::_dump_var($value, $prop) . ";\n\n";
+    }
+
+    return $out;
+  }
+
+
+  /**
+   * save generated config file in RCUBE_CONFIG_DIR
+   *
+   * @return boolean True if the file was saved successfully, false if not
+   */
+  function save_configfile($config)
+  {
+    if (is_writable(RCUBE_CONFIG_DIR)) {
+      return file_put_contents(RCUBE_CONFIG_DIR . 'config.inc.php', $config);
+    }
+
+    return false;
+  }
+
+  /**
+   * Check the current configuration for missing properties
+   * and deprecated or obsolete settings
+   *
+   * @return array List with problems detected
+   */
+  function check_config()
+  {
+    $this->load_config();
+
+    if (!$this->configured) {
+      return null;
+    }
+
+    $out = $seen = array();
+
+    // iterate over the current configuration
+    foreach ($this->config as $prop => $value) {
+      if ($replacement = $this->replaced_config[$prop]) {
+        $out['replaced'][] = array('prop' => $prop, 'replacement' => $replacement);
+        $seen[$replacement] = true;
+      }
+      else if (!$seen[$prop] && in_array($prop, $this->obsolete_config)) {
+        $out['obsolete'][] = array('prop' => $prop);
+        $seen[$prop] = true;
+      }
+    }
+
+    // the old default mime_magic reference is obsolete
+    if ($this->config['mime_magic'] == '/usr/share/misc/magic') {
+        $out['obsolete'][] = array('prop' => 'mime_magic', 'explain' => "Set value to null in order to use system default");
+    }
+
+    // check config dependencies and contradictions
+    if ($this->config['enable_spellcheck'] && $this->config['spellcheck_engine'] == 'pspell') {
+      if (!extension_loaded('pspell')) {
+        $out['dependencies'][] = array('prop' => 'spellcheck_engine',
+          'explain' => 'This requires the <tt>pspell</tt> extension which could not be loaded.');
+      }
+      else if (!empty($this->config['spellcheck_languages'])) {
+        foreach ($this->config['spellcheck_languages'] as $lang => $descr)
+          if (!@pspell_new($lang))
+            $out['dependencies'][] = array('prop' => 'spellcheck_languages',
+              'explain' => "You are missing pspell support for language $lang ($descr)");
+      }
+    }
+
+    if ($this->config['log_driver'] == 'syslog') {
+      if (!function_exists('openlog')) {
+        $out['dependencies'][] = array('prop' => 'log_driver',
+          'explain' => 'This requires the <tt>syslog</tt> extension which could not be loaded.');
+      }
+      if (empty($this->config['syslog_id'])) {
+        $out['dependencies'][] = array('prop' => 'syslog_id',
+          'explain' => 'Using <tt>syslog</tt> for logging requires a syslog ID to be configured');
+      }
+    }
+
+    // check ldap_public sources having global_search enabled
+    if (is_array($this->config['ldap_public']) && !is_array($this->config['autocomplete_addressbooks'])) {
+      foreach ($this->config['ldap_public'] as $ldap_public) {
+        if ($ldap_public['global_search']) {
+          $out['replaced'][] = array('prop' => 'ldap_public::global_search', 'replacement' => 'autocomplete_addressbooks');
+          break;
+        }
+      }
+    }
+
+    return $out;
+  }
+
+
+  /**
+   * Merge the current configuration with the defaults
+   * and copy replaced values to the new options.
+   */
+  function merge_config()
+  {
+    $current = $this->config;
+    $this->config = array();
+
+    foreach ($this->replaced_config as $prop => $replacement) {
+      if (isset($current[$prop])) {
+        if ($prop == 'skin_path')
+          $this->config[$replacement] = preg_replace('#skins/(\w+)/?$#', '\\1', $current[$prop]);
+        else if ($prop == 'multiple_identities')
+          $this->config[$replacement] = $current[$prop] ? 2 : 0;
+        else
+          $this->config[$replacement] = $current[$prop];
+      }
+      unset($current[$prop]);
+    }
+
+    foreach ($this->obsolete_config as $prop) {
+      unset($current[$prop]);
+    }
+
+    // add all ldap_public sources having global_search enabled to autocomplete_addressbooks
+    if (is_array($current['ldap_public'])) {
+      foreach ($current['ldap_public'] as $key => $ldap_public) {
+        if ($ldap_public['global_search']) {
+          $this->config['autocomplete_addressbooks'][] = $key;
+          unset($current['ldap_public'][$key]['global_search']);
+        }
+      }
+    }
+
+    $this->config = array_merge($this->config, $current);
+
+    foreach (array_keys((array)$current['ldap_public']) as $key) {
+      $this->config['ldap_public'][$key] = $current['ldap_public'][$key];
+    }
+  }
+
+  /**
+   * Compare the local database schema with the reference schema
+   * required for this version of Roundcube
+   *
+   * @param rcube_db Database object
+   *
+   * @return boolean True if the schema is up-to-date, false if not or an error occurred
+   */
+  function db_schema_check($DB)
+  {
+    if (!$this->configured)
+      return false;
+
+    // read reference schema from mysql.initial.sql
+    $db_schema = $this->db_read_schema(INSTALL_PATH . 'SQL/mysql.initial.sql');
+    $errors = array();
+
+    // check list of tables
+    $existing_tables = $DB->list_tables();
+
+    foreach ($db_schema as $table => $cols) {
+      $table = $this->config['db_prefix'] . $table;
+      if (!in_array($table, $existing_tables)) {
+        $errors[] = "Missing table '".$table."'";
+      }
+      else {  // compare cols
+        $db_cols = $DB->list_cols($table);
+        $diff = array_diff(array_keys($cols), $db_cols);
+        if (!empty($diff))
+          $errors[] = "Missing columns in table '$table': " . join(',', $diff);
+      }
+    }
+
+    return !empty($errors) ? $errors : false;
+  }
+
+  /**
+   * Utility function to read database schema from an .sql file
+   */
+  private function db_read_schema($schemafile)
+  {
+    $lines = file($schemafile);
+    $table_block = false;
+    $schema = array();
+    foreach ($lines as $line) {
+      if (preg_match('/^\s*create table `?([a-z0-9_]+)`?/i', $line, $m)) {
+        $table_block = $m[1];
+      }
+      else if ($table_block && preg_match('/^\s*`?([a-z0-9_-]+)`?\s+([a-z]+)/', $line, $m)) {
+        $col = $m[1];
+        if (!in_array(strtoupper($col), array('PRIMARY','KEY','INDEX','UNIQUE','CONSTRAINT','REFERENCES','FOREIGN'))) {
+          $schema[$table_block][$col] = $m[2];
+        }
+      }
+    }
+
+    return $schema;
+  }
+
+  /**
+   * Try to detect some file's mimetypes to test the correct behavior of fileinfo
+   */
+  function check_mime_detection()
+  {
+    $files = array(
+      'skins/larry/images/roundcube_logo.png' => 'image/png',
+      'program/resources/blank.tif' => 'image/tiff',
+      'program/resources/blocked.gif' => 'image/gif',
+      'skins/larry/README' => 'text/plain',
+    );
+
+    $errors = array();
+    foreach ($files as $path => $expected) {
+      $mimetype = rcube_mime::file_content_type(INSTALL_PATH . $path, basename($path));
+      if ($mimetype != $expected) {
+        $errors[] = array($path, $mimetype, $expected);
+      }
+    }
+
+    return $errors;
+  }
+
+  /**
+   * Check the correct configuration of the 'mime_types' mapping option
+   */
+  function check_mime_extensions()
+  {
+    $types = array(
+      'application/zip'   => 'zip',
+      'application/x-tar' => 'tar',
+      'application/java-archive' => 'jar',
+      'image/gif'     => 'gif',
+      'image/svg+xml' => 'svg',
+    );
+
+    $errors = array();
+    foreach ($types as $mimetype => $expected) {
+      $ext = rcube_mime::get_mime_extensions($mimetype);
+      if ($ext[0] != $expected) {
+        $errors[] = array($mimetype, $ext, $expected);
+      }
+    }
+
+    return $errors;
+  }
+
+  /**
+   * Getter for the last error message
+   *
+   * @return string Error message or null if none exists
+   */
+  function get_error()
+  {
+      return $this->last_error['message'];
+  }
+
+
+  /**
+   * Return a list with all imap hosts configured
+   *
+   * @return array Clean list with imap hosts
+   */
+  function get_hostlist()
+  {
+    $default_hosts = (array)$this->getprop('default_host');
+    $out = array();
+
+    foreach ($default_hosts as $key => $name) {
+      if (!empty($name))
+        $out[] = rcube_parse_host(is_numeric($key) ? $name : $key);
+    }
+
+    return $out;
+  }
+
+  /**
+   * Create a HTML dropdown to select a previous version of Roundcube
+   */
+  function versions_select($attrib = array())
+  {
+    $select = new html_select($attrib);
+    $select->add(array(
+        '0.1-stable', '0.1.1',
+        '0.2-alpha', '0.2-beta', '0.2-stable',
+        '0.3-stable', '0.3.1',
+        '0.4-beta', '0.4.2',
+        '0.5-beta', '0.5', '0.5.1', '0.5.2', '0.5.3', '0.5.4',
+        '0.6-beta', '0.6',
+        '0.7-beta', '0.7', '0.7.1', '0.7.2', '0.7.3', '0.7.4',
+        '0.8-beta', '0.8-rc', '0.8.0', '0.8.1', '0.8.2', '0.8.3', '0.8.4', '0.8.5', '0.8.6',
+        '0.9-beta', '0.9-rc', '0.9-rc2',
+        // Note: Do not add newer versions here
+    ));
+    return $select;
+  }
+
+  /**
+   * Return a list with available subfolders of the skin directory
+   */
+  function list_skins()
+  {
+    $skins = array();
+    $skindir = INSTALL_PATH . 'skins/';
+    foreach (glob($skindir . '*') as $path) {
+      if (is_dir($path) && is_readable($path)) {
+        $skins[] = substr($path, strlen($skindir));
+      }
+    }
+    return $skins;
+  }
+
+  /**
+   * Display OK status
+   *
+   * @param string Test name
+   * @param string Confirm message
+   */
+  function pass($name, $message = '')
+  {
+    echo Q($name) . ':&nbsp; <span class="success">OK</span>';
+    $this->_showhint($message);
+  }
+
+
+  /**
+   * Display an error status and increase failure count
+   *
+   * @param string Test name
+   * @param string Error message
+   * @param string URL for details
+   * @param bool   Do not count this failure
+   */
+  function fail($name, $message = '', $url = '', $optional=false)
+  {
+    if (!$optional) {
+      $this->failures++;
+    }
+
+    echo Q($name) . ':&nbsp; <span class="fail">NOT OK</span>';
+    $this->_showhint($message, $url);
+  }
+
+
+  /**
+   * Display an error status for optional settings/features
+   *
+   * @param string Test name
+   * @param string Error message
+   * @param string URL for details
+   */
+  function optfail($name, $message = '', $url = '')
+  {
+    echo Q($name) . ':&nbsp; <span class="na">NOT OK</span>';
+    $this->_showhint($message, $url);
+  }
+
+
+  /**
+   * Display warning status
+   *
+   * @param string Test name
+   * @param string Warning message
+   * @param string URL for details
+   */
+  function na($name, $message = '', $url = '')
+  {
+    echo Q($name) . ':&nbsp; <span class="na">NOT AVAILABLE</span>';
+    $this->_showhint($message, $url);
+  }
+
+
+  function _showhint($message, $url = '')
+  {
+    $hint = Q($message);
+
+    if ($url)
+      $hint .= ($hint ? '; ' : '') . 'See <a href="' . Q($url) . '" target="_blank">' . Q($url) . '</a>';
+
+    if ($hint)
+      echo '<span class="indent">(' . $hint . ')</span>';
+  }
+
+
+  static function _clean_array($arr)
+  {
+    $out = array();
+
+    foreach (array_unique($arr) as $k => $val) {
+      if (!empty($val)) {
+        if (is_numeric($k))
+          $out[] = $val;
+        else
+          $out[$k] = $val;
+      }
+    }
+
+    return $out;
+  }
+
+
+  static function _dump_var($var, $name=null)
+  {
+    // special values
+    switch ($name) {
+    case 'syslog_facility':
+      $list = array(32 => 'LOG_AUTH', 80 => 'LOG_AUTHPRIV', 72 => ' LOG_CRON',
+                    24 => 'LOG_DAEMON', 0 => 'LOG_KERN', 128 => 'LOG_LOCAL0',
+                    136 => 'LOG_LOCAL1', 144 => 'LOG_LOCAL2', 152 => 'LOG_LOCAL3',
+                    160 => 'LOG_LOCAL4', 168 => 'LOG_LOCAL5', 176 => 'LOG_LOCAL6',
+                    184 => 'LOG_LOCAL7', 48 => 'LOG_LPR', 16 => 'LOG_MAIL',
+                    56 => 'LOG_NEWS', 40 => 'LOG_SYSLOG', 8 => 'LOG_USER', 64 => 'LOG_UUCP');
+      if ($val = $list[$var])
+        return $val;
+      break;
+
+    case 'mail_header_delimiter':
+      $var = str_replace(array("\r", "\n"), array('\r', '\n'), $var);
+      return '"' . $var. '"';
+      break;
+/*
+    // RCMAIL_VERSION is undefined here
+    case 'useragent':
+      if (preg_match('|^(.*)/('.preg_quote(RCMAIL_VERSION, '|').')$|i', $var, $m)) {
+        return '"' . addcslashes($var, '"') . '/" . RCMAIL_VERSION';
+      }
+      break;
+*/
+    }
+
+    if (is_array($var)) {
+      if (empty($var)) {
+        return 'array()';
+      }
+      else {  // check if all keys are numeric
+        $isnum = true;
+        foreach (array_keys($var) as $key) {
+          if (!is_numeric($key)) {
+            $isnum = false;
+            break;
+          }
+        }
+
+        if ($isnum)
+          return 'array(' . join(', ', array_map(array('rcmail_install', '_dump_var'), $var)) . ')';
+      }
+    }
+
+    return var_export($var, true);
+  }
+
+
+  /**
+   * Initialize the database with the according schema
+   *
+   * @param object rcube_db Database connection
+   * @return boolen True on success, False on error
+   */
+  function init_db($DB)
+  {
+    $engine = $DB->db_provider;
+
+    // read schema file from /SQL/*
+    $fname = INSTALL_PATH . "SQL/$engine.initial.sql";
+    if ($sql = @file_get_contents($fname)) {
+      $this->exec_sql($sql, $DB);
+    }
+    else {
+      $this->fail('DB Schema', "Cannot read the schema file: $fname");
+      return false;
+    }
+
+    if ($err = $this->get_error()) {
+      $this->fail('DB Schema', "Error creating database schema: $err");
+      return false;
+    }
+
+    return true;
+  }
+
+
+  /**
+   * Update database schema
+   *
+   * @param string Version to update from
+   *
+   * @return boolen True on success, False on error
+   */
+  function update_db($version)
+  {
+    system(INSTALL_PATH . "bin/updatedb.sh --package=roundcube"
+      . " --version=" . escapeshellarg($version)
+      . " --dir=" . INSTALL_PATH . "SQL"
+      . " 2>&1", $result);
+
+    return !$result;
+  }
+
+
+  /**
+   * Execute the given SQL queries on the database connection
+   *
+   * @param string SQL queries to execute
+   * @param object rcube_db Database connection
+   * @return boolen True on success, False on error
+   */
+  function exec_sql($sql, $DB)
+  {
+    $sql = $this->fix_table_names($sql, $DB);
+    $buff = '';
+    foreach (explode("\n", $sql) as $line) {
+      if (preg_match('/^--/', $line) || trim($line) == '')
+        continue;
+
+      $buff .= $line . "\n";
+      if (preg_match('/(;|^GO)$/', trim($line))) {
+        $DB->query($buff);
+        $buff = '';
+        if ($DB->is_error())
+          break;
+      }
+    }
+
+    return !$DB->is_error();
+  }
+
+
+  /**
+   * Parse SQL file and fix table names according to db_prefix
+   * Note: This need to be a complete database initial file
+   */
+  private function fix_table_names($sql, $DB)
+  {
+    if (empty($this->config['db_prefix'])) {
+        return $sql;
+    }
+
+    // replace table names
+    if (preg_match_all('/CREATE TABLE (\[dbo\]\.|IF NOT EXISTS )?[`"\[\]]*([^`"\[\] \r\n]+)/i', $sql, $matches)) {
+      foreach ($matches[2] as $table) {
+        $real_table = $this->config['db_prefix'] . $table;
+        $sql = preg_replace("/([^a-zA-Z0-9_])$table([^a-zA-Z0-9_])/", "\\1$real_table\\2", $sql);
+      }
+    }
+    // replace sequence names
+    if ($DB->db_provider == 'postgres' && preg_match_all('/CREATE SEQUENCE (IF NOT EXISTS )?"?([^" \n\r]+)/i', $sql, $matches)) {
+      foreach ($matches[2] as $sequence) {
+        $real_sequence = $this->config['db_prefix'] . $sequence;
+        $sql = preg_replace("/([^a-zA-Z0-9_])$sequence([^a-zA-Z0-9_])/", "\\1$real_sequence\\2", $sql);
+      }
+    }
+
+    return $sql;
+  }
+
+
+  /**
+   * Handler for Roundcube errors
+   */
+  function raise_error($p)
+  {
+      $this->last_error = $p;
+  }
+
+
+  /**
+   * Generarte a ramdom string to be used as encryption key
+   *
+   * @param int Key length
+   * @return string The generated random string
+   * @static
+   */
+  function random_key($length)
+  {
+    $alpha = 'ABCDEFGHIJKLMNOPQERSTUVXYZabcdefghijklmnopqrtsuvwxyz0123456789+*%&?!$-_=';
+    $out = '';
+
+    for ($i=0; $i < $length; $i++)
+      $out .= $alpha{rand(0, strlen($alpha)-1)};
+
+    return $out;
+  }
+
+}
+