<?php
//////////////////////////////////////////////////////////////////////////
// + $Id$
// +------------------------------------------------------------------+ //
// + Cake PHP : Rapid Development Framework <http://www.cakephp.org/> + //
// + Copyright: (c) 2005, CakePHP Authors/Developers                  + //
// + Author(s): Michal Tatarynowicz aka Pies <tatarynowicz@gmail.com> + //
// +            Larry E. Masters aka PhpNut <nut@phpnut.com>          + //
// +            Kamil Dzielinski aka Brego <brego.dk@gmail.com>       + //
// +------------------------------------------------------------------+ //
// + Licensed under The MIT License                                   + //
// + Redistributions of files must retain the above copyright notice. + //
// + See: http://www.opensource.org/licenses/mit-license.php          + //
//////////////////////////////////////////////////////////////////////////

/**
  * AdoDB layer for DBO.
  * 
  * @filesource 
  * @author CakePHP Authors/Developers
  * @copyright Copyright (c) 2005, CakePHP Authors/Developers
  * @link https://trac.cakephp.org/wiki/Authors Authors/Developers
  * @package cake
  * @subpackage cake.libs.dbo
  * @since CakePHP v 0.2.9
  * @version $Revision$
  * @modifiedby $LastChangedBy$
  * @lastmodified $Date$
  * @license http://www.opensource.org/licenses/mit-license.php The MIT License
  */

/**
  * Include AdoDB files.
  */
require_once(VENDORS.'adodb/adodb.inc.php');

/**
  * AdoDB layer for DBO.
  *
  * @package cake
  * @subpackage cake.libs.dbo
  * @since CakePHP v 0.2.9
  */
class DBO_AdoDB extends DBO 
{
   
/**
 * ADOConnection object with which we connect.
 *
 * @var ADOConnection The connection object.
 * @access private
 */
   var $_adodb = null;

/**
  * Connects to the database using options in the given configuration array.
  *
  * @param array $config Configuration array for connecting
  */
   function connect ($config) 
   {
      if ($this->config = $config)
      {
         if (isset($config['driver']))
         {
            $this->_adodb = NewADOConnection($config['driver']);

            $adodb =& $this->_adodb;
            $this->connected = $adodb->Connect($config['host'], $config['login'], $config['password'], $config['database']);
         }
      }

      if(!$this->connected)
         die('Could not connect to DB.');
   }

/**
  * Disconnects from database.
  *
  * @return boolean True if the database could be disconnected, else false
  */
   function disconnect () 
   {
      return $this->_adodb->close();
   }

/**
  * Executes given SQL statement.
  *
  * @param string $sql SQL statement
  * @return resource Result resource identifier
  */
   function execute ($sql) 
   {
      return $this->_adodb->execute($sql);
   }

/**
  * Returns a row from given resultset as an array .
  *
  * @return array The fetched row as an array
  */
   function fetchRow () 
   {
      return $this->_result->FetchRow();
   }

/**
  * Returns an array of tables in the database. If there are no tables, an error is raised and the application exits.
  *
  * @return array Array of tablenames in the database
  */
   function tablesList () 
   {
      $tables = $this->_adodb->MetaTables('TABLES');

      if (!sizeof($tables)>0) {
         trigger_error(ERROR_NO_TABLE_LIST, E_USER_NOTICE);
         exit;
      }
      return $tables;
   }

/**
  * Returns an array of the fields in given table name.
  *
  * @param string $table_name Name of database table to inspect
  * @return array Fields in table. Keys are name and type
  */
   function fields ($table_name)
   {
      $data = $this->_adodb->MetaColumns($table_name);
      $fields = false;

      foreach ($data as $item)
         $fields[] = array('name'=>$item->name, 'type'=>$item->type);

      return $fields;
   }

/**
  * Returns a quoted and escaped string of $data for use in an SQL statement.
  *
  * @param string $data String to be prepared for use in an SQL statement
  * @return string Quoted and escaped
  *
  * :TODO: To be implemented.
  */
   function prepareValue ($data)      
   {
      return $this->_adodb->Quote($data);
   }

/**
  * Returns a formatted error message from previous database operation.
  *
  * @return string Error message
  */
   function lastError () 
   {
      return $this->_adodb->ErrorMsg();
   }

/**
  * Returns number of affected rows in previous database operation. If no previous operation exists, this returns false.
  *
  * @return int Number of affected rows
  */
   function lastAffected ()
   {
      return $this->_adodb->Affected_Rows(); 
   }

/**
  * Returns number of rows in previous resultset. If no previous resultset exists, 
  * this returns false.
  *
  * @return int Number of rows in resultset
  */
   function lastNumRows () 
   {
       return $this->_result? $this->_result->RecordCount(): false;
   }

/**
  * Returns the ID generated from the previous INSERT operation.
  *
  * @return int 
  *
  * :TODO: To be implemented.
  */
   function lastInsertId ()      { die('Please implement DBO::lastInsertId() first.'); }

/**
 * Returns a limit statement in the correct format for the particular database.
 *
 * @param int $limit Limit of results returned
 * @param int $offset Offset from which to start results
 * @return string SQL limit/offset statement
 */
   function selectLimit ($limit, $offset=null)
   {
      return " LIMIT {$limit}".($offset? "{$offset}": null);
      // please change to whatever select your database accepts
      // adodb doesn't allow us to get the correct limit string out of it
   }

}

?>