<?php

/*

 *  $Id: Sqlite.php 4252 2008-04-19 07:37:53Z jwage $

 *

 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS

 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT

 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR

 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT

 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,

 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT

 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 *

 * This software consists of voluntary contributions made by many individuals

 * and is licensed under the LGPL. For more information, see

 * <http://www.phpdoctrine.org>.

 */



/**

 * Doctrine_Connection_Sqlite

 *

 * @package     Doctrine

 * @subpackage  Connection

 * @license     http://www.opensource.org/licenses/lgpl-license.php LGPL

 * @author      Konsta Vesterinen <kvesteri@cc.hut.fi>

 * @author      Lukas Smith <smith@pooteeweet.org> (PEAR MDB2 library)

 * @version     $Revision: 4252 $

 * @link        www.phpdoctrine.org

 * @since       1.0

 */

class Doctrine_Connection_Sqlite extends Doctrine_Connection_Common

{

    /**

     * @var string $driverName                  the name of this connection driver

     */

    protected $driverName = 'Sqlite';



    /**

     * the constructor

     *

     * @param Doctrine_Manager $manager

     * @param PDO $pdo                          database handle

     */

    public function __construct(Doctrine_Manager $manager, $adapter)

    {

        $this->supported = array('sequences'            => 'emulated',

                          'indexes'              => true,

                          'affected_rows'        => true,

                          'summary_functions'    => true,

                          'order_by_text'        => true,

                          'current_id'           => 'emulated',

                          'limit_queries'        => true,

                          'LOBs'                 => true,

                          'replace'              => true,

                          'transactions'         => true,

                          'savepoints'           => false,

                          'sub_selects'          => true,

                          'auto_increment'       => true,

                          'primary_key'          => true,

                          'result_introspection' => false, // not implemented

                          'prepared_statements'  => 'emulated',

                          'identifier_quoting'   => true,

                          'pattern_escaping'     => false,

                          );

         parent::__construct($manager, $adapter);



        if ($this->isConnected) {

            $this->dbh->sqliteCreateFunction('mod',    array('Doctrine_Expression_Sqlite', 'modImpl'), 2);

            $this->dbh->sqliteCreateFunction('concat', array('Doctrine_Expression_Sqlite', 'concatImpl'));

            $this->dbh->sqliteCreateFunction('md5', 'md5', 1);

            $this->dbh->sqliteCreateFunction('now', 'time', 0);

        }

    }



    /**

     * initializes database functions missing in sqlite

     *

     * @see Doctrine_Expression

     * @return void

     */

    public function connect() 

    {

        if ($this->isConnected) {

            return false;

        }



        parent::connect();



        $this->dbh->sqliteCreateFunction('mod',    array('Doctrine_Expression_Sqlite', 'modImpl'), 2);

        $this->dbh->sqliteCreateFunction('concat', array('Doctrine_Expression_Sqlite', 'concatImpl'));

        $this->dbh->sqliteCreateFunction('md5', 'md5', 1);

        $this->dbh->sqliteCreateFunction('now', 'time', 0);

    }



    /**

     * createDatabase

     *

     * @return void

     */

    public function createDatabase()

    {

      try {

          if ( ! $dsn = $this->getOption('dsn')) {

              throw new Doctrine_Connection_Exception('You must create your Doctrine_Connection by using a valid Doctrine style dsn in order to use the create/drop database functionality');

          }



          $info = $this->getManager()->parseDsn($dsn);



          $this->export->createDatabase($info['database']);



          return 'Successfully created database for connection "' . $this->getName() . '" at path "' . $info['database'] . '"';

      } catch (Exception $e) {

          return $e;

      }

    }



    /**

     * dropDatabase

     *

     * @return void

     */

    public function dropDatabase()

    {

      try {

          if ( ! $dsn = $this->getOption('dsn')) {

              throw new Doctrine_Connection_Exception('You must create your Doctrine_Connection by using a valid Doctrine style dsn in order to use the create/drop database functionality');

          }

          

          $info = $this->getManager()->parseDsn($dsn);



          $this->export->dropDatabase($info['database']);



          return 'Successfully dropped database for connection "' . $this->getName() . '" at path "' . $info['database'] . '"';

      } catch (Exception $e) {

          return $e;

      }

    }

}