install.php

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<?php
/********************************************************************************
 *
 *  Xataface Web Application Framework for PHP and MySQL
 *  Copyright (C) 2006  Steve Hannah <shannah@sfu.ca>
 *  
 *  This library is free software; you can redistribute it and/or
 *  modify it under the terms of the GNU Lesser General Public
 *  License as published by the Free Software Foundation; either
 *  version 2.1 of the License, or (at your option) any later version.
 *  
 *  This library is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 *  Lesser General Public License for more details.
 *  
 *  You should have received a copy of the GNU Lesser General Public
 *  License along with this library; if not, write to the Free Software
 *  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 *
 *===============================================================================
 */
 
class dataface_actions_install {

        function handle(&$params){
        
                $app =& Dataface_Application::getInstance();
                
                if ( df_get_database_version() == df_get_file_system_version() ){
                        $app->redirect(DATAFACE_SITE_HREF.'?--msg='.urlencode('The application database is up to date at version '.df_get_database_version()));
                }
                
                if ( df_get_database_version() > df_get_file_system_version() ){
                        $app->redirect(DATAFACE_SITE_HREF.'?--msg='.urlencode('The database version is greater than the file system version.  Please upgrade your application to match the version in the database (version '.df_get_database_version()));
                }
                
                $res = mysql_query("select count(*) from dataface__version", df_db());
                if ( !$res ){
                        throw new Exception(mysql_error(df_db()));
                }
                $row = mysql_fetch_row($res);
                if ( $row[0] == 0 ){
                        $res2 = mysql_query("insert into dataface__version (`version`) values (0)", df_db());
                        if ( !$res2 ) throw new Exception(mysql_error(df_db()));
                }
                
                if ( file_exists('conf/Installer.php') ){
                        import('conf/Installer.php');
                        $installer = new conf_Installer;
                        
                        $methods = get_class_methods('conf_Installer');
                        $methods = preg_grep('/^update_([0-9]+)$/', $methods);
                        
                        $updates = array();
                        
                        foreach ($methods as $method){
                                preg_match('/^update_([0-9]+)$/', $method, $matches);
                                $version = intval($matches[1]);
                                if ( $version > df_get_database_version() and $version <= df_get_file_system_version() ){
                                        $updates[] = $version;
                                }
                        }
                        
                        sort($updates);
                        
                        foreach ($updates as $update ){
                                $method = 'update_'.$update;
                                $res = $installer->$method();
                                if ( PEAR::isError($res) ) return $res;
                                $res = mysql_query("update dataface__version set `version`='".addslashes($update)."'", df_db());
                                if ( !$res ) throw new Exception(mysql_error(df_db()), E_USER_ERROR);   
                        }
                        
                        
                        
                }
                
                
                $res = mysql_query("update dataface__version set `version`='".addslashes(df_get_file_system_version())."'", df_db());
                if ( !$res ) throw new Exception(mysql_error(df_db()), E_USER_ERROR);
                
                $app->redirect(DATAFACE_SITE_HREF.'?--msg='.urlencode('The database has been successfully updated to version '.df_get_file_system_version()));

                
        }
}