<?php
/**
*
* This file is part of the phpBB Forum Software package.
*
* @copyright (c) phpBB Limited <https://www.phpbb.com>
* @license GNU General Public License, version 2 (GPL-2.0)
*
* For full copyright and license information, please see
* the docs/CREDITS.txt file.
*
*/
namespace phpbb\install\helper;
use phpbb\install\exception\invalid_dbms_exception;
/**
* Database related general functionality for installer
*/
class database
{
/**
* @var \phpbb\filesystem\filesystem_interface
*/
protected $filesystem;
/**
* @var string
*/
protected $phpbb_root_path;
/**
* @var array
*/
protected $supported_dbms = array(
// Note: php 5.5 alpha 2 deprecated mysql.
// Keep mysqli before mysql in this list.
'mysqli' => array(
'LABEL' => 'MySQL with MySQLi Extension',
'SCHEMA' => 'mysql_41',
'MODULE' => 'mysqli',
'DELIM' => ';',
'DRIVER' => 'phpbb\db\driver\mysqli',
'AVAILABLE' => true,
'2.0.x' => true,
),
'mssql_odbc'=> array(
'LABEL' => 'MS SQL Server [ ODBC ]',
'SCHEMA' => 'mssql',
'MODULE' => 'odbc',
'DELIM' => ';',
'DRIVER' => 'phpbb\db\driver\mssql_odbc',
'AVAILABLE' => true,
'2.0.x' => true,
),
'mssqlnative' => array(
'LABEL' => 'MS SQL Server 2005+ [ Native ]',
'SCHEMA' => 'mssql',
'MODULE' => 'sqlsrv',
'DELIM' => ';',
'DRIVER' => 'phpbb\db\driver\mssqlnative',
'AVAILABLE' => true,
'2.0.x' => false,
),
'oracle' => array(
'LABEL' => 'Oracle',
'SCHEMA' => 'oracle',
'MODULE' => 'oci8',
'DELIM' => ';',
'DRIVER' => 'phpbb\db\driver\oracle',
'AVAILABLE' => true,
'2.0.x' => false,
),
'postgres' => array(
'LABEL' => 'PostgreSQL 8.3+',
'SCHEMA' => 'postgres',
'MODULE' => 'pgsql',
'DELIM' => ';',
'DRIVER' => 'phpbb\db\driver\postgres',
'AVAILABLE' => true,
'2.0.x' => true,
),
'sqlite3' => array(
'LABEL' => 'SQLite3',
'SCHEMA' => 'sqlite',
'MODULE' => 'sqlite3',
'DELIM' => ';',
'DRIVER' => 'phpbb\db\driver\sqlite3',
'AVAILABLE' => true,
'2.0.x' => false,
),
);
/**
* Constructor
*
* @param \phpbb\filesystem\filesystem_interface $filesystem Filesystem interface
* @param string $phpbb_root_path Path to phpBB's root
*/
public function __construct(\phpbb\filesystem\filesystem_interface $filesystem, $phpbb_root_path)
{
$this->filesystem = $filesystem;
$this->phpbb_root_path = $phpbb_root_path;
}
/**
* Returns an array of available DBMS supported by phpBB
*
* If a DBMS is specified it will only return data for that DBMS
* and will load its extension if necessary.
*
* @param mixed $dbms name of the DBMS that's info is required or false for all DBMS info
* @param bool $return_unavailable set it to true if you expect unavailable but supported DBMS
* returned as well
* @param bool $only_20x_options set it to true if you only want to recover 2.0.x options
*
* @return array Array of available and supported DBMS
*/
public function get_available_dbms($dbms = false, $return_unavailable = false, $only_20x_options = false)
{
$available_dbms = $this->supported_dbms;
if ($dbms)
{
if (isset($this->supported_dbms[$dbms]))
{
$available_dbms = array($dbms => $this->supported_dbms[$dbms]);
}
else
{
return array();
}
}
$any_dbms_available = false;
foreach ($available_dbms as $db_name => $db_array)
{
if ($only_20x_options && !$db_array['2.0.x'])
{
if ($return_unavailable)
{
$available_dbms[$db_name]['AVAILABLE'] = false;
}
else
{
unset($available_dbms[$db_name]);
}
continue;
}
$dll = $db_array['MODULE'];
if (!@extension_loaded($dll))
{
if ($return_unavailable)
{
$available_dbms[$db_name]['AVAILABLE'] = false;
}
else
{
unset($available_dbms[$db_name]);
}
continue;
}
$any_dbms_available = true;
}
if ($return_unavailable)
{
$available_dbms['ANY_DB_SUPPORT'] = $any_dbms_available;
}
return $available_dbms;
}
/**
* Removes "/* style" as well as "# style" comments from $input.
*
* @param string $sql_query Input string
*
* @return string Input string with comments removed
*/
public function remove_comments($sql_query)
{
// Remove /* */ comments (http://ostermiller.org/findcomment.html)
$sql_query = preg_replace('#/\*(.|[\r\n])*?\*/#', "\n", $sql_query);
// Remove # style comments
$sql_query = preg_replace('/\n{2,}/', "\n", preg_replace('/^#.*$/m', "\n", $sql_query));
return $sql_query;
}
/**
* split_sql_file() will split an uploaded sql file into single sql statements.
*
* Note: expects trim() to have already been run on $sql.
*
* @param string $sql SQL statements
* @param string $delimiter Delimiter between sql statements
*
* @return array Array of sql statements
*/
public function split_sql_file($sql, $delimiter)
{
$sql = str_replace("\r" , '', $sql);
$data = preg_split('/' . preg_quote($delimiter, '/') . '$/m', $sql);
$data = array_map('trim', $data);
// The empty case
$end_data = end($data);
if (empty($end_data))
{
unset($data[key($data)]);
}
return $data;
}
/**
* Validates table prefix
*
* @param string $dbms The selected dbms
* @param string $table_prefix The table prefix to validate
*
* @return bool|array true if table prefix is valid, array of errors otherwise
*
* @throws \phpbb\install\exception\invalid_dbms_exception When $dbms is not a valid
*/
public function validate_table_prefix($dbms, $table_prefix)
{
$errors = array();
if (!preg_match('#^[a-zA-Z][a-zA-Z0-9_]*$#', $table_prefix))
{
$errors[] = array(
'title' => 'INST_ERR_DB_INVALID_PREFIX',
);
}
// Do dbms specific checks
$dbms_info = $this->get_available_dbms($dbms);
switch ($dbms_info[$dbms]['SCHEMA'])
{
case 'mysql_41':
$prefix_length = 36;
break;
case 'mssql':
$prefix_length = 90;
break;
case 'oracle':
$prefix_length = 6;
break;
case 'postgres':
$prefix_length = 36;
break;
case 'sqlite':
$prefix_length = 200;
break;
default:
throw new invalid_dbms_exception();
break;
}
// Check the prefix length to ensure that index names are not too long
if (strlen($table_prefix) > $prefix_length)
{
$errors[] = array(
'title' => array('INST_ERR_PREFIX_TOO_LONG', $prefix_length),
);
}
return (empty($errors)) ? true : $errors;
}
/**
* Check if the user provided database parameters are correct
*
* This function checks the database connection data and also checks for
* any other problems that could cause an error during the installation
* such as if there is any database table names conflicting.
*
* Note: The function assumes that $table_prefix has been already validated
* with validate_table_prefix().
*
* @param string $dbms Selected database type
* @param string $dbhost Database host address
* @param int $dbport Database port number
* @param string $dbuser Database username
* @param string $dbpass Database password
* @param string $dbname Database name
* @param string $table_prefix Database table prefix
*
* @return array|bool Returns true if test is successful, array of errors otherwise
*/
public function check_database_connection($dbms, $dbhost, $dbport, $dbuser, $dbpass, $dbname, $table_prefix)
{
$dbms_info = $this->get_available_dbms($dbms);
$dbms_info = $dbms_info[$dbms];
$errors = array();
// Instantiate it and set return on error true
/** @var \phpbb\db\driver\driver_interface $db */
$db = new $dbms_info['DRIVER'];
$db->sql_return_on_error(true);
// Check that we actually have a database name before going any further
if (!in_array($dbms_info['SCHEMA'], array('sqlite', 'oracle'), true) && $dbname === '')
{
$errors[] = array(
'title' => 'INST_ERR_DB_NO_NAME',
);
}
// Make sure we don't have a daft user who thinks having the SQLite database in the forum directory is a good idea
if ($dbms_info['SCHEMA'] === 'sqlite'
&& stripos($this->filesystem->realpath($dbhost), $this->filesystem->realpath($this->phpbb_root_path) === 0))
{
$errors[] = array(
'title' =>'INST_ERR_DB_FORUM_PATH',
);
}
// Check if SQLite database is writable
if ($dbms_info['SCHEMA'] === 'sqlite'
&& (($this->filesystem->exists($dbhost) && !$this->filesystem->is_writable($dbhost)) || !$this->filesystem->is_writable(pathinfo($dbhost, PATHINFO_DIRNAME))))
{
$errors[] = array(
'title' =>'INST_ERR_DB_NO_WRITABLE',
);
}
// Try to connect to db
if (is_array($db->sql_connect($dbhost, $dbuser, $dbpass, $dbname, $dbport, false, true)))
{
$db_error = $db->sql_error();
$errors[] = array(
'title' => 'INST_ERR_DB_CONNECT',
'description' => ($db_error['message']) ? utf8_convert_message($db_error['message']) : 'INST_ERR_DB_NO_ERROR',
);
}
else
{
// Check if there is any table name collisions
$temp_prefix = strtolower($table_prefix);
$table_ary = array(
$temp_prefix . 'attachments',
$temp_prefix . 'config',
$temp_prefix . 'sessions',
$temp_prefix . 'topics',
$temp_prefix . 'users',
);
$db_tools_factory = new \phpbb\db\tools\factory();
$db_tools = $db_tools_factory->get($db);
$tables = $db_tools->sql_list_tables();
$tables = array_map('strtolower', $tables);
$table_intersect = array_intersect($tables, $table_ary);
if (count($table_intersect))
{
$errors[] = array(
'title' => 'INST_ERR_PREFIX',
);
}
// Check if database version is supported
switch ($dbms)
{
case 'sqlite3':
if (version_compare($db->sql_server_info(true), '3.6.15', '<'))
{
$errors[] = array(
'title' => 'INST_ERR_DB_NO_SQLITE3',
);
}
break;
case 'oracle':
$sql = "SELECT *
FROM NLS_DATABASE_PARAMETERS
WHERE PARAMETER = 'NLS_RDBMS_VERSION'
OR PARAMETER = 'NLS_CHARACTERSET'";
$result = $db->sql_query($sql);
while ($row = $db->sql_fetchrow($result))
{
$stats[$row['parameter']] = $row['value'];
}
$db->sql_freeresult($result);
if (version_compare($stats['NLS_RDBMS_VERSION'], '9.2', '<') && $stats['NLS_CHARACTERSET'] !== 'UTF8')
{
$errors[] = array(
'title' => 'INST_ERR_DB_NO_ORACLE',
);
}
break;
case 'postgres':
$sql = "SHOW server_encoding;";
$result = $db->sql_query($sql);
$row = $db->sql_fetchrow($result);
$db->sql_freeresult($result);
if ($row['server_encoding'] !== 'UNICODE' && $row['server_encoding'] !== 'UTF8')
{
$errors[] = array(
'title' => 'INST_ERR_DB_NO_POSTGRES',
);
}
break;
}
}
return (empty($errors)) ? true : $errors;
}
}