File vendors/shells/migrate.php | BEdita API doc

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<?php
/*-----8<--------------------------------------------------------------------
 * 
 * BEdita - a semantic content management framework
 * 
 * Copyright 2008 ChannelWeb Srl, Chialab Srl
 * 
 * This file is part of BEdita: 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 3 of the License, or 
 * (at your option) any later version.
 * BEdita is distributed 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 
 * version 3 along with BEdita (see LICENSE.LGPL).
 * If not, see <http://gnu.org/licenses/lgpl-3.0.html>.
 * 
 *------------------------------------------------------------------->8-----
 */

App::import('Core', 'String');
App::import('Core', 'Controller');
App::import('Core', 'Model');
App::import('Controller', 'App'); // BeditaException
App::import('Model', 'Document');

/**
 * @version         $Revision$
 * @modifiedby      $LastChangedBy$
 * @lastmodified    $LastChangedDate$
 * 
 * $Id$
 */
class DumpModel extends AppModel {
    var $useTable = "objects";
};

/**
 * Migration scripts base class
 *
 */
abstract class MigrationBase {
    
    protected $model;
    private $handle;
    
    protected function createInsert($data, $t) {
        $fields = "";
        $values = "";
        $count = 0;
        foreach ($data as $k=>$v) {
            if($v !== NULL) {
                if($count > 0) {
                    $fields .= ",";
                    $values .= ",";
                }
                $fields .= "`$k`";
                $values .= "'".addslashes($v)."'";
                $count++;
            }
        }
        return "INSERT INTO $t (".$fields.") VALUES ($values);\n";
    }
    
    public function setModel(Model $m) {
        $this->model = $m;
    }

    public function setFile($f) {
        $this->handle = fopen($f, "w");
        if($this->handle === FALSE) 
            throw new Exception("Error opening file: ".$f);
    }
    
    protected function write($s) {
        fwrite($this->handle, $s);
    }
    
    protected function close() {
        fclose($this->handle);
    }
    
    protected function copyTable($t) {
        $res = $this->model->query("SELECT * from $t");
        foreach ($res as $r) {
            $this->write($this->createInsert($r[$t], $t));
        }
    }

    protected function createExportFromArray(array $arr) {
        foreach ($arr as $method => $q) {
            if($method == "copy") {
                $tables =  explode(" ", $q);
                foreach ($tables as $t) {
                    $this->copyTable($t);
                }
            } else {
                $res = $this->model->query($q);
                if(is_array($res)) {
                    foreach ($res as $r) {
                        $this->$method($r);
                    }
                }
            }
        }
    }
    
    abstract public function createExport();
};

/**
 * Migration shell: shell script to migrate BEdita instances from previous versions.
 * You have to create a specific 'migration' script (defining a Migration class that extends MigrationBase), 
 * like:
 * class Migration extends MigrationBase {
 * }
 */
class MigrateShell extends Shell {

    const DEFAULT_MIGRATION_DUMP = 'bedita-migration.sql' ;
    
    public function main() {
        $this->migrate();
    }
    
    public function migrate() {
        
        $dbCfg = 'default';
        if (isset($this->params['db'])) {
            $dbCfg = $this->params['db'];
        }
        $db = ConnectionManager::getDataSource($dbCfg);
        $dbName = $db->config['database'];
        $this->out("Importing data from db config: $dbCfg - database=".$dbName);
        $model = new DumpModel();
        $model->setDataSource($dbCfg);
        
        $scr = $this->params['script'];
        if (empty($scr)) {
            $this->out("script file is mandatory, use -script ");
            return;
        }
        $this->out("Using script: $scr");
        include_once($scr);
        
        $migration = new Migration();
        $migration->setModel($model);
        $expFile = self::DEFAULT_MIGRATION_DUMP;
        if (isset($this->params['f'])) {
            $expFile = $this->params['f'];
        }
        if(file_exists($expFile)) {
            $res = $this->in("$expFile exists, overwrite? [y/n]");
            if($res == "y") {
                if(!unlink($expFile)){
                    throw new Exception("Error deleting $expFile");
                }
            } else {
                $this->out("Export aborted. Bye.");
                return;
            }
        }
        
        $migration->setFile($expFile);
        $migration->createExport();
    }
    
    function help() {
    
        $this->out('Available functions:');
        $this->out('1. migrate: migrate db data');
        $this->out(' ');
        $this->out('   Usage: migrate -script <migration-script.php> [-db <dbname>] [-f <sql-dump-filename>]');
        $this->out(' ');
    }
    
}

?>

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