<?php
/**
 * @package    jelix
 * @subpackage db_driver
 *
 * @author     Loic Mathaud
 * @contributor Laurent Jouanneau
 *
 * @copyright  2006 Loic Mathaud, 2007-2015 Laurent Jouanneau
 *
 * @see      http://www.jelix.org
 * @licence  http://www.gnu.org/licenses/lgpl.html GNU Lesser General Public Licence, see LICENCE file
 */
require_once dirname(__FILE__).'/sqlite3.dbresultset.php';

/**
 * @package    jelix
 * @subpackage db_driver
 */
class sqlite3DbConnection extends jDbConnection
{
    public function __construct($profile)
    {
        if (!class_exists('SQLite3')) {
            throw new jException('jelix~db.error.nofunction', 'sqlite3');
        }
        parent::__construct($profile);
        $this->dbms = 'sqlite';
    }

    /**
     * begin a transaction.
     */
    public function beginTransaction()
    {
        $this->_doExec('BEGIN');
    }

    /**
     * Commit since the last begin.
     */
    public function commit()
    {
        $this->_doExec('COMMIT');
    }

    /**
     * Rollback since the last BEGIN.
     */
    public function rollback()
    {
        $this->_doExec('ROLLBACK');
    }

    /**
     * @param mixed $query
     */
    public function prepare($query)
    {
        $res = $this->_connection->prepare($query);
        if ($res) {
            $rs = new sqlite3DbResultSet(null, $res);
        } else {
            throw new jException('jelix~db.error.query.bad', $this->_connection->error.'('.$query.')');
        }

        return $rs;
    }

    public function errorInfo()
    {
        return array($this->_connection->lastErrorCode(), $this->_connection->lastErrorMsg());
    }

    public function errorCode()
    {
        return $this->_connection->lastErrorCode();
    }

    protected function _connect()
    {
        $db = $this->profile['database'];
        if (preg_match('/^(app|lib|var|temp|www)\:/', $db)) {
            $path = jFile::parseJelixPath($db);
        } elseif ($db[0] == '/' // *nix path
                 || preg_match('!^[a-z]\\:(\\\\|/)[a-z]!i', $db) // windows path
                ) {
            if (file_exists($db) || file_exists(dirname($db))) {
                $path = $db;
            } else {
                throw new Exception('sqlite3 connector: unknown database path scheme');
            }
        } else {
            $path = jApp::varPath('db/sqlite3/'.$db);
        }

        $sqlite = new SQLite3($path);

        // Load extensions if needed
        if (isset($this->profile['extensions'])) {
            $list = preg_split('/ *, */', $this->profile['extensions']);
            foreach ($list as $ext) {
                try {
                    $sqlite->loadExtension($ext);
                } catch (Exception $e) {
                    throw new Exception('sqlite3 connector: error while loading sqlite extension '.$ext);
                }
            }
        }

        // set timeout
        if (isset($this->profile['busytimeout'])) {
            $timeout = intval($this->profile['busytimeout']);
            if ($timeout) {
                $sqlite->busyTimeout($timeout);
            }
        }

        return $sqlite;
    }

    protected function _disconnect()
    {
        return $this->_connection->close();
    }

    protected function _doQuery($query)
    {
        if ($qI = $this->_connection->query($query)) {
            return new sqlite3DbResultSet($qI);
        }

        throw new jException('jelix~db.error.query.bad', $this->_connection->lastErrorMsg().' ('.$query.')');
    }

    protected function _doExec($query)
    {
        if ($qI = $this->_connection->exec($query)) {
            return $this->_connection->changes();
        }

        throw new jException('jelix~db.error.query.bad', $this->_connection->lastErrorMsg().' ('.$query.')');
    }

    protected function _doLimitQuery($queryString, $offset, $number)
    {
        $queryString .= ' LIMIT '.$offset.','.$number;
        $this->lastQuery = $queryString;

        return $this->_doQuery($queryString);
    }

    public function lastInsertId($fromSequence = '')
    {
        return $this->_connection->lastInsertRowID();
    }

    /**
     * tell sqlite to be autocommit or not.
     *
     * @param bool $state the state of the autocommit value
     */
    protected function _autoCommitNotify($state)
    {
        $this->query('SET AUTOCOMMIT='.$state ? '1' : '0');
    }

    /**
     * @param mixed $text
     * @param mixed $binary
     *
     * @return string the text with non ascii char and quotes escaped
     */
    protected function _quote($text, $binary)
    {
        return $this->_connection->escapeString($text);
    }

    /**
     * @param int $id the attribut id
     *
     * @return string the attribute value
     *
     * @see PDO::getAttribute()
     */
    public function getAttribute($id)
    {
        switch ($id) {
            case self::ATTR_CLIENT_VERSION:
            case self::ATTR_SERVER_VERSION:
                $v = SQLite3::version();

                return $v['versionString'];
        }

        return '';
    }

    /**
     * @param int    $id    the attribut id
     * @param string $value the attribute value
     *
     * @see PDO::setAttribute()
     */
    public function setAttribute($id, $value)
    {
    }
}
