Remove rcube_mdb2 class file

1 files changed, 0 insertions, 935 deletions

diff --git a/program/include/rcube_mdb2.php b/program/include/rcube_mdb2.php
deleted file mode 100644
index 721963b4c..000000000
--- a/program/include/rcube_mdb2.php
+++ /dev/null
@@ -1,935 +0,0 @@
-<?php
-
-/*
- +-----------------------------------------------------------------------+
- | program/include/rcube_mdb2.php                                        |
- |                                                                       |
- | This file is part of the Roundcube Webmail client                     |
- | Copyright (C) 2005-2009, 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.                     |
- |                                                                       |
- | PURPOSE:                                                              |
- |   PEAR:DB wrapper class that implements PEAR MDB2 functions           |
- |   See http://pear.php.net/package/MDB2                                |
- |                                                                       |
- +-----------------------------------------------------------------------+
- | Author: Lukas Kahwe Smith <smith@pooteeweet.org>                      |
- +-----------------------------------------------------------------------+
-*/
-
-
-/**
- * Database independent query interface
- *
- * This is a wrapper for the PEAR::MDB2 class
- *
- * @package    Database
- * @author     David Saez Padros <david@ols.es>
- * @author     Thomas Bruederli <roundcube@gmail.com>
- * @author     Lukas Kahwe Smith <smith@pooteeweet.org>
- * @version    1.18
- * @link       http://pear.php.net/package/MDB2
- */
-class rcube_mdb2
-{
-    public $db_dsnw;               // DSN for write operations
-    public $db_dsnr;               // DSN for read operations
-    public $db_connected = false;  // Already connected ?
-    public $db_mode = '';          // Connection mode
-    public $db_handle = 0;         // Connection handle
-    public $db_error = false;
-    public $db_error_msg = '';
-
-    private $debug_mode = false;
-    private $conn_failure = false;
-    private $a_query_results = array('dummy');
-    private $last_res_id = 0;
-    private $tables;
-    private $variables;
-
-
-    /**
-     * Object constructor
-     *
-     * @param  string $db_dsnw DSN for read/write operations
-     * @param  string $db_dsnr Optional DSN for read only operations
-     */
-    public function __construct($db_dsnw, $db_dsnr='', $pconn=false)
-    {
-        if (empty($db_dsnr)) {
-            $db_dsnr = $db_dsnw;
-        }
-
-        $this->db_dsnw = $db_dsnw;
-        $this->db_dsnr = $db_dsnr;
-        $this->db_pconn = $pconn;
-
-        $dsn_array = MDB2::parseDSN($db_dsnw);
-        $this->db_provider = $dsn_array['phptype'];
-    }
-
-
-    /**
-     * Connect to specific database
-     *
-     * @param  string $dsn  DSN for DB connections
-     * @return MDB2 PEAR database handle
-     * @access private
-     */
-    private function dsn_connect($dsn)
-    {
-        // Use persistent connections if available
-        $db_options = array(
-            'persistent'       => $this->db_pconn,
-            'emulate_prepared' => $this->debug_mode,
-            'debug'            => $this->debug_mode,
-            'debug_handler'    => array($this, 'debug_handler'),
-            'portability'      => MDB2_PORTABILITY_ALL ^ MDB2_PORTABILITY_EMPTY_TO_NULL,
-        );
-
-        if ($this->db_provider == 'pgsql') {
-            $db_options['disable_smart_seqname'] = true;
-            $db_options['seqname_format'] = '%s';
-        }
-        $this->db_error     = false;
-        $this->db_error_msg = null;
-
-        $dbh = MDB2::connect($dsn, $db_options);
-
-        if (MDB2::isError($dbh)) {
-            $this->db_error = true;
-            $this->db_error_msg = $dbh->getMessage();
-
-            rcube::raise_error(array('code' => 500, 'type' => 'db',
-                'line' => __LINE__, 'file' => __FILE__,
-                'message' => $dbh->getUserInfo()), true, false);
-        }
-        else if ($this->db_provider == 'sqlite') {
-            $dsn_array = MDB2::parseDSN($dsn);
-            if (!filesize($dsn_array['database']) && !empty($this->sqlite_initials)) {
-                $this->sqlite_create_database($dbh, $this->sqlite_initials);
-            }
-        }
-        else if ($this->db_provider != 'mssql' && $this->db_provider != 'sqlsrv') {
-            $dbh->setCharset('utf8');
-        }
-
-        return $dbh;
-    }
-
-
-    /**
-     * Connect to appropiate database depending on the operation
-     *
-     * @param  string $mode Connection mode (r|w)
-     */
-    public function db_connect($mode)
-    {
-        // previous connection failed, don't attempt to connect again
-        if ($this->conn_failure) {
-            return;
-        }
-
-        // no replication
-        if ($this->db_dsnw == $this->db_dsnr) {
-            $mode = 'w';
-        }
-
-        // Already connected
-        if ($this->db_connected) {
-            // connected to db with the same or "higher" mode
-            if ($this->db_mode == 'w' || $this->db_mode == $mode) {
-                return;
-            }
-        }
-
-        $dsn = ($mode == 'r') ? $this->db_dsnr : $this->db_dsnw;
-
-        $this->db_handle    = $this->dsn_connect($dsn);
-        $this->db_connected = !PEAR::isError($this->db_handle);
-
-        // use write-master when read-only fails
-        if (!$this->db_connected && $mode == 'r') {
-            $mode = 'w';
-            $this->db_handle    = $this->dsn_connect($this->db_dsnw);
-            $this->db_connected = !PEAR::isError($this->db_handle);
-        }
-
-        if ($this->db_connected) {
-            $this->db_mode = $mode;
-        }
-        else {
-            $this->conn_failure = true;
-        }
-    }
-
-
-    /**
-     * Activate/deactivate debug mode
-     *
-     * @param boolean $dbg True if SQL queries should be logged
-     */
-    public function set_debug($dbg = true)
-    {
-        $this->debug_mode = $dbg;
-        if ($this->db_connected) {
-            $this->db_handle->setOption('debug', $dbg);
-            $this->db_handle->setOption('emulate_prepared', $dbg);
-        }
-    }
-
-
-    /**
-     * Getter for error state
-     *
-     * @param  boolean  True on error
-     */
-    public function is_error()
-    {
-        return $this->db_error ? $this->db_error_msg : false;
-    }
-
-
-    /**
-     * Connection state checker
-     *
-     * @param  boolean  True if in connected state
-     */
-    public function is_connected()
-    {
-        return PEAR::isError($this->db_handle) ? false : $this->db_connected;
-    }
-
-
-    /**
-     * Is database replication configured?
-     * This returns true if dsnw != dsnr
-     */
-    public function is_replicated()
-    {
-      return !empty($this->db_dsnr) && $this->db_dsnw != $this->db_dsnr;
-    }
-
-
-    /**
-     * Get database runtime variables
-     *
-     * @param string Variable name
-     * @param mixed  Default value if var is not set
-     * @return mixed Variable value or default
-     */
-    public function get_variable($varname, $default = null)
-    {
-        if (!isset($this->variables)) {
-            $this->variables = array();
-
-            // only mysql and postgres are know to support this
-            if ($this->db_provider == 'pgsql' || $this->db_provider == 'mysql' || $this->db_provider == 'mysqli') {
-                $this->db_connect('r');
-                $query = $this->db_provider == 'pgsql' ? 'SHOW ALL' : 'SHOW VARIABLES';
-                foreach ((array)$this->db_handle->queryAll($query) as $row)
-                    $this->variables[$row[0]] = $row[1];
-            }
-        }
-
-        return isset($this->variables[$varname]) ? $this->variables[$varname] : $default;
-    }
-
-
-    /**
-     * Execute a SQL query
-     *
-     * @param  string  SQL query to execute
-     * @param  mixed   Values to be inserted in query
-     *
-     * @return number  Query handle identifier
-     */
-    public function query()
-    {
-        $params = func_get_args();
-        $query = array_shift($params);
-
-        // Support one argument of type array, instead of n arguments
-        if (count($params) == 1 && is_array($params[0])) {
-            $params = $params[0];
-        }
-
-        return $this->_query($query, 0, 0, $params);
-    }
-
-
-    /**
-     * Execute a SQL query with limits
-     *
-     * @param  string  SQL query to execute
-     * @param  number  Offset for LIMIT statement
-     * @param  number  Number of rows for LIMIT statement
-     * @param  mixed   Values to be inserted in query
-     *
-     * @return number  Query handle identifier
-     */
-    public function limitquery()
-    {
-        $params  = func_get_args();
-        $query   = array_shift($params);
-        $offset  = array_shift($params);
-        $numrows = array_shift($params);
-
-        return $this->_query($query, $offset, $numrows, $params);
-    }
-
-
-    /**
-     * Execute a SQL query with limits
-     *
-     * @param  string $query   SQL query to execute
-     * @param  number $offset  Offset for LIMIT statement
-     * @param  number $numrows Number of rows for LIMIT statement
-     * @param  array  $params  Values to be inserted in query
-     * @return number  Query handle identifier
-     * @access private
-     */
-    private function _query($query, $offset, $numrows, $params)
-    {
-        // Read or write ?
-        $mode = (strtolower(substr(trim($query),0,6)) == 'select') ? 'r' : 'w';
-
-        $this->db_connect($mode);
-
-        // check connection before proceeding
-        if (!$this->is_connected()) {
-            return null;
-        }
-
-        if ($this->db_provider == 'sqlite') {
-            $this->sqlite_prepare();
-        }
-
-        if ($numrows || $offset) {
-            $result = $this->db_handle->setLimit($numrows,$offset);
-        }
-
-        if (empty($params)) {
-            $result = $mode == 'r' ? $this->db_handle->query($query) : $this->db_handle->exec($query);
-        }
-        else {
-            $params = (array)$params;
-            $q = $this->db_handle->prepare($query, null, $mode=='w' ? MDB2_PREPARE_MANIP : null);
-            if ($this->db_handle->isError($q)) {
-                $this->db_error = true;
-                $this->db_error_msg = $q->userinfo;
-
-                rcube::raise_error(array('code' => 500, 'type' => 'db',
-                    'line' => __LINE__, 'file' => __FILE__,
-                    'message' => $this->db_error_msg), true, false);
-
-                $result = false;
-            }
-            else {
-                $result = $q->execute($params);
-                $q->free();
-            }
-        }
-
-        // add result, even if it's an error
-        return $this->_add_result($result);
-    }
-
-
-    /**
-     * Get number of rows for a SQL query
-     * If no query handle is specified, the last query will be taken as reference
-     *
-     * @param  number $res_id  Optional query handle identifier
-     * @return mixed   Number of rows or false on failure
-     */
-    public function num_rows($res_id=null)
-    {
-        if (!$this->db_connected) {
-            return false;
-        }
-
-        if ($result = $this->_get_result($res_id)) {
-            return $result->numRows();
-        }
-
-        return false;
-    }
-
-
-    /**
-     * Get number of affected rows for the last query
-     *
-     * @param  number $res_id Optional query handle identifier
-     * @return mixed   Number of rows or false on failure
-     */
-    public function affected_rows($res_id = null)
-    {
-        if (!$this->db_connected) {
-            return false;
-        }
-
-        return $this->_get_result($res_id);
-    }
-
-
-    /**
-     * Get last inserted record ID
-     * For Postgres databases, a sequence name is required
-     *
-     * @param  string $table  Table name (to find the incremented sequence)
-     *
-     * @return mixed   ID or false on failure
-     */
-    public function insert_id($table = '')
-    {
-        if (!$this->db_connected || $this->db_mode == 'r') {
-            return false;
-        }
-
-        if ($table) {
-            if ($this->db_provider == 'pgsql') {
-                // find sequence name
-                $table = $this->sequence_name($table);
-            }
-            else {
-                // resolve table name
-                $table = $this->table_name($table);
-            }
-        }
-
-        $id = $this->db_handle->lastInsertID($table);
-
-        return $this->db_handle->isError($id) ? null : $id;
-    }
-
-
-    /**
-     * Get an associative array for one row
-     * If no query handle is specified, the last query will be taken as reference
-     *
-     * @param  number $res_id Optional query handle identifier
-     *
-     * @return mixed   Array with col values or false on failure
-     */
-    public function fetch_assoc($res_id = null)
-    {
-        $result = $this->_get_result($res_id);
-        return $this->_fetch_row($result, MDB2_FETCHMODE_ASSOC);
-    }
-
-
-    /**
-     * Get an index array for one row
-     * If no query handle is specified, the last query will be taken as reference
-     *
-     * @param  number $res_id  Optional query handle identifier
-     *
-     * @return mixed   Array with col values or false on failure
-     */
-    public function fetch_array($res_id = null)
-    {
-        $result = $this->_get_result($res_id);
-        return $this->_fetch_row($result, MDB2_FETCHMODE_ORDERED);
-    }
-
-
-    /**
-     * Get col values for a result row
-     *
-     * @param  MDB2_Result_Common Query $result result handle
-     * @param  number                   $mode   Fetch mode identifier
-     *
-     * @return mixed  Array with col values or false on failure
-     */
-    private function _fetch_row($result, $mode)
-    {
-        if ($result === false || PEAR::isError($result) || !$this->is_connected()) {
-            return false;
-        }
-
-        return $result->fetchRow($mode);
-    }
-
-
-    /**
-     * Wrapper for the SHOW TABLES command
-     *
-     * @return array List of all tables of the current database
-     * @since 0.4-beta
-     */
-    public function list_tables()
-    {
-        // get tables if not cached
-        if (!$this->tables) {
-            $this->db_handle->loadModule('Manager');
-            if (!PEAR::isError($result = $this->db_handle->listTables())) {
-                $this->tables = $result;
-            }
-            else {
-                $this->tables = array();
-            }
-        }
-
-        return $this->tables;
-    }
-
-
-    /**
-     * Wrapper for SHOW COLUMNS command
-     *
-     * @param string Table name
-     *
-     * @return array List of table cols
-     */
-    public function list_cols($table)
-    {
-        $this->db_handle->loadModule('Manager');
-        if (!PEAR::isError($result = $this->db_handle->listTableFields($table))) {
-            return $result;
-        }
-
-        return null;
-    }
-
-
-    /**
-     * Formats input so it can be safely used in a query
-     *
-     * @param  mixed  $input  Value to quote
-     * @param  string $type   Type of data
-     *
-     * @return string  Quoted/converted string for use in query
-     */
-    public function quote($input, $type = null)
-    {
-        // handle int directly for better performance
-        if ($type == 'integer') {
-            return intval($input);
-        }
-
-        // create DB handle if not available
-        if (!$this->db_handle) {
-            $this->db_connect('r');
-        }
-
-        return $this->db_connected ? $this->db_handle->quote($input, $type) : addslashes($input);
-    }
-
-
-    /**
-     * Quotes a string so it can be safely used as a table or column name
-     *
-     * @param  string $str Value to quote
-     *
-     * @return string  Quoted string for use in query
-     * @deprecated     Replaced by rcube_MDB2::quote_identifier
-     * @see            rcube_mdb2::quote_identifier
-     */
-    public function quoteIdentifier($str)
-    {
-        return $this->quote_identifier($str);
-    }
-
-
-    /**
-     * Quotes a string so it can be safely used as a table or column name
-     *
-     * @param  string $str Value to quote
-     *
-     * @return string  Quoted string for use in query
-     */
-    public function quote_identifier($str)
-    {
-        if (!$this->db_handle) {
-            $this->db_connect('r');
-        }
-
-        return $this->db_connected ? $this->db_handle->quoteIdentifier($str) : $str;
-    }
-
-
-    /**
-     * Escapes a string
-     *
-     * @param  string $str The string to be escaped
-     *
-     * @return string  The escaped string
-     * @since  0.1.1
-     */
-    public function escapeSimple($str)
-    {
-        if (!$this->db_handle) {
-            $this->db_connect('r');
-        }
-
-        return $this->db_handle->escape($str);
-    }
-
-
-    /**
-     * Return SQL function for current time and date
-     *
-     * @return string SQL function to use in query
-     */
-    public function now()
-    {
-        switch ($this->db_provider) {
-            case 'mssql':
-            case 'sqlsrv':
-                return "getdate()";
-
-            default:
-                return "now()";
-        }
-    }
-
-
-    /**
-     * Return list of elements for use with SQL's IN clause
-     *
-     * @param  array  $arr  Input array
-     * @param  string $type Type of data
-     *
-     * @return string Comma-separated list of quoted values for use in query
-     */
-    public function array2list($arr, $type = null)
-    {
-        if (!is_array($arr)) {
-            return $this->quote($arr, $type);
-        }
-
-        foreach ($arr as $idx => $item) {
-            $arr[$idx] = $this->quote($item, $type);
-        }
-
-        return implode(',', $arr);
-    }
-
-
-    /**
-     * Return SQL statement to convert a field value into a unix timestamp
-     *
-     * This method is deprecated and should not be used anymore due to limitations
-     * of timestamp functions in Mysql (year 2038 problem)
-     *
-     * @param  string $field Field name
-     *
-     * @return string  SQL statement to use in query
-     * @deprecated
-     */
-    public function unixtimestamp($field)
-    {
-        switch($this->db_provider) {
-            case 'pgsql':
-                return "EXTRACT (EPOCH FROM $field)";
-
-            case 'mssql':
-            case 'sqlsrv':
-                return "DATEDIFF(second, '19700101', $field) + DATEDIFF(second, GETDATE(), GETUTCDATE())";
-
-            default:
-                return "UNIX_TIMESTAMP($field)";
-        }
-    }
-
-
-    /**
-     * Return SQL statement to convert from a unix timestamp
-     *
-     * @param  string $timestamp Field name
-     *
-     * @return string  SQL statement to use in query
-     */
-    public function fromunixtime($timestamp)
-    {
-        return date("'Y-m-d H:i:s'", $timestamp);
-    }
-
-
-    /**
-     * Return SQL statement for case insensitive LIKE
-     *
-     * @param  string $column  Field name
-     * @param  string $value   Search value
-     *
-     * @return string  SQL statement to use in query
-     */
-    public function ilike($column, $value)
-    {
-        // TODO: use MDB2's matchPattern() function
-        switch ($this->db_provider) {
-            case 'pgsql':
-                return $this->quote_identifier($column).' ILIKE '.$this->quote($value);
-            default:
-                return $this->quote_identifier($column).' LIKE '.$this->quote($value);
-        }
-    }
-
-
-    /**
-     * Abstract SQL statement for value concatenation
-     *
-     * @return string SQL statement to be used in query
-     */
-    public function concat(/* col1, col2, ... */)
-    {
-        $func = '';
-        $args = func_get_args();
-        if (is_array($args[0]))
-            $args = $args[0];
-
-        switch ($this->db_provider) {
-            case 'mysql':
-            case 'mysqli':
-                $func = 'CONCAT';
-                $delim = ', ';
-                break;
-            case 'mssql':
-            case 'sqlsrv':
-                $delim = ' + ';
-                // Modify arguments, because + operator requires them to be of type varchar (#1488505)
-                // with SQL Server 2012 we can use just CONCAT(), but we need to support older versions
-                foreach ($args as $idx => $arg) {
-                    $args[$idx] = "CAST($arg AS varchar)";
-                }
-                break;
-            default:
-                $delim = ' || ';
-        }
-
-        return $func . '(' . join($delim, $args) . ')';
-    }
-
-
-    /**
-     * Encodes non-UTF-8 characters in string/array/object (recursive)
-     *
-     * @param  mixed  $input Data to fix
-     *
-     * @return mixed  Properly UTF-8 encoded data
-     */
-    public static function encode($input)
-    {
-        if (is_object($input)) {
-            foreach (get_object_vars($input) as $idx => $value) {
-                $input->$idx = self::encode($value);
-            }
-            return $input;
-        }
-        else if (is_array($input)) {
-            foreach ($input as $idx => $value) {
-                $input[$idx] = self::encode($value);
-            }
-            return $input;
-        }
-
-        return utf8_encode($input);
-    }
-
-
-    /**
-     * Decodes encoded UTF-8 string/object/array (recursive)
-     *
-     * @param  mixed $input Input data
-     *
-     * @return mixed  Decoded data
-     */
-    public static function decode($input)
-    {
-        if (is_object($input)) {
-            foreach (get_object_vars($input) as $idx => $value) {
-                $input->$idx = self::decode($value);
-            }
-            return $input;
-        }
-        else if (is_array($input)) {
-            foreach ($input as $idx => $value) {
-                $input[$idx] = self::decode($value);
-            }
-            return $input;
-        }
-
-        return utf8_decode($input);
-    }
-
-
-    /**
-     * Adds a query result and returns a handle ID
-     *
-     * @param  object $res Query handle
-     *
-     * @return mixed   Handle ID
-     */
-    private function _add_result($res)
-    {
-        // sql error occured
-        if (PEAR::isError($res)) {
-            $this->db_error = true;
-            $this->db_error_msg = $res->getMessage();
-            rcube::raise_error(array('code' => 500, 'type' => 'db',
-                'line' => __LINE__, 'file' => __FILE__,
-                'message' => $res->getMessage() . " Query: " 
-                . substr(preg_replace('/[\r\n]+\s*/', ' ', $res->userinfo), 0, 512)),
-                true, false);
-        }
-
-        $res_id = sizeof($this->a_query_results);
-        $this->last_res_id = $res_id;
-        $this->a_query_results[$res_id] = $res;
-        return $res_id;
-    }
-
-
-    /**
-     * Resolves a given handle ID and returns the according query handle
-     * If no ID is specified, the last resource handle will be returned
-     *
-     * @param  number $res_id Handle ID
-     *
-     * @return mixed   Resource handle or false on failure
-     */
-    private function _get_result($res_id = null)
-    {
-        if ($res_id == null) {
-            $res_id = $this->last_res_id;
-        }
-
-        if (isset($this->a_query_results[$res_id])) {
-            if (!PEAR::isError($this->a_query_results[$res_id])) {
-                return $this->a_query_results[$res_id];
-            }
-        }
-
-        return false;
-    }
-
-
-    /**
-     * Create a sqlite database from a file
-     *
-     * @param  MDB2   $dbh       SQLite database handle
-     * @param  string $file_name File path to use for DB creation
-     */
-    private function sqlite_create_database($dbh, $file_name)
-    {
-        if (empty($file_name) || !is_string($file_name)) {
-            return;
-        }
-
-        $data = file_get_contents($file_name);
-
-        if (strlen($data)) {
-            if (!sqlite_exec($dbh->connection, $data, $error) || MDB2::isError($dbh)) {
-                rcube::raise_error(array('code' => 500, 'type' => 'db',
-                    'line' => __LINE__, 'file' => __FILE__,
-                    'message' => $error), true, false);
-            }
-        }
-    }
-
-
-    /**
-     * Add some proprietary database functions to the current SQLite handle
-     * in order to make it MySQL compatible
-     */
-    private function sqlite_prepare()
-    {
-        // we emulate via callback some missing MySQL functions
-        sqlite_create_function($this->db_handle->connection,
-            'unix_timestamp', array('rcube_mdb2', 'sqlite_unix_timestamp'));
-        sqlite_create_function($this->db_handle->connection,
-            'now', array('rcube_mdb2', 'sqlite_now'));
-    }
-
-
-    /**
-     * Debug handler for the MDB2
-     */
-    function debug_handler(&$db, $scope, $message, $context = array())
-    {
-        if ($scope != 'prepare') {
-            $debug_output = sprintf('%s(%d): %s;',
-                $scope, $db->db_index, rtrim($message, ';'));
-            rcube::write_log('sql', $debug_output);
-        }
-    }
-
-
-    /**
-     * Return correct name for a specific database table
-     *
-     * @param string $table Table name
-     *
-     * @return string Translated table name
-     */
-    public function table_name($table)
-    {
-        $rcube = rcube::get_instance();
-
-        // return table name if configured
-        $config_key = 'db_table_'.$table;
-
-        if ($name = $rcube->config->get($config_key)) {
-            return $name;
-        }
-
-        return $table;
-    }
-
-
-    /**
-     * Return correct name for a specific database sequence
-     * (used for Postgres only)
-     *
-     * @param string $sequence Secuence name
-     *
-     * @return string Translated sequence name
-     */
-    public function sequence_name($sequence)
-    {
-        $rcube = rcube::get_instance();
-
-        // return sequence name if configured
-        $config_key = 'db_sequence_'.$sequence;
-
-        if ($name = $rcube->config->get($config_key)) {
-            return $name;
-        }
-
-        return $sequence;
-    }
-
-
-    /**
-     * Callback for sqlite: unix_timestamp()
-     */
-    public static function sqlite_unix_timestamp($timestamp = '')
-    {
-        $timestamp = trim($timestamp);
-        if (!$timestamp) {
-            $ret = time();
-        }
-        else if (!preg_match('/^[0-9]+$/s', $timestamp)) {
-            $ret = strtotime($timestamp);
-        }
-        else {
-            $ret = $timestamp;
-        }
-
-        return $ret;
-    }
-
-
-    /**
-     * Callback for sqlite: now()
-     */
-    public static function sqlite_now()
-    {
-        return date("Y-m-d H:i:s");
-    }
-
-}