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Editing: sqlite.php

<?php

/**
 +-----------------------------------------------------------------------+
 | This file is part of the Roundcube Webmail client                     |
 |                                                                       |
 | Copyright (C) The Roundcube Dev Team                                  |
 |                                                                       |
 | Licensed under the GNU General Public License version 3 or            |
 | any later version with exceptions for skins & plugins.                |
 | See the README file for a full license statement.                     |
 |                                                                       |
 | PURPOSE:                                                              |
 |   Database wrapper class that implements PHP PDO functions            |
 |   for SQLite database                                                 |
 +-----------------------------------------------------------------------+
 | Author: Aleksander Machniak <alec@alec.pl>                            |
 +-----------------------------------------------------------------------+
*/

/**
 * Database independent query interface
 * This is a wrapper for the PHP PDO
 *
 * @package    Framework
 * @subpackage Database
 */
class rcube_db_sqlite extends rcube_db
{
    public $db_provider = 'sqlite';

/**
     * Prepare connection
     */
    protected function conn_prepare($dsn)
    {
        // Create database file, required by PDO to exist on connection
        if (!empty($dsn['database']) && !file_exists($dsn['database'])) {
            $created = touch($dsn['database']);

// File mode setting, for compat. with MDB2
            if (!empty($dsn['mode']) && $created) {
                chmod($dsn['database'], octdec($dsn['mode']));
            }
        }
    }

/**
     * Configure connection, create database if not exists
     */
    protected function conn_configure($dsn, $dbh)
    {
        // Initialize database structure in file is empty
        if (!empty($dsn['database']) && !filesize($dsn['database'])) {
            $data = file_get_contents(RCUBE_INSTALL_PATH . 'SQL/sqlite.initial.sql');

if (strlen($data)) {
                $this->debug('INITIALIZE DATABASE');

$q = $dbh->exec($data);

if ($q === false) {
                    $error = $dbh->errorInfo();
                    $this->db_error = true;
                    $this->db_error_msg = sprintf('[%s] %s', $error[1], $error[2]);

rcube::raise_error([
                            'code' => 500, 'type' => 'db',
                            'line' => __LINE__, 'file' => __FILE__,
                            'message' => $this->db_error_msg
                        ],
                        true, false
                    );
                }
            }
        }

// Enable WAL mode to fix locking issues like #8035.
        $dbh->query("PRAGMA journal_mode = WAL");

// Enable foreign keys (requires sqlite 3.6.19 compiled with FK support)
        $dbh->query("PRAGMA foreign_keys = ON");
    }

/**
     * Return SQL statement to convert a field value into a unix timestamp
     *
     * @param string $field Field name
     *
     * @return string  SQL statement to use in query
     * @deprecated
     */
    public function unixtimestamp($field)
    {
        return "strftime('%s', $field)";
    }

/**
     * Return SQL function for current time and date
     *
     * @param int $interval Optional interval (in seconds) to add/subtract
     *
     * @return string SQL function to use in query
     */
    public function now($interval = 0)
    {
        $add = '';

if ($interval) {
            $add = ($interval > 0 ? '+' : '') . intval($interval) . ' seconds';
        }

return "datetime('now'" . ($add ? ", '$add'" : "") . ")";
    }

/**
     * Returns list of tables in database
     *
     * @return array List of all tables of the current database
     */
    public function list_tables()
    {
        if ($this->tables === null) {
            $q = $this->query('SELECT name FROM sqlite_master'
                .' WHERE type = \'table\' ORDER BY name');

$this->tables = $q ? $q->fetchAll(PDO::FETCH_COLUMN, 0) : [];
        }

return $this->tables;
    }

/**
     * Returns list of columns in database table
     *
     * @param string $table Table name
     *
     * @return array List of table cols
     */
    public function list_cols($table)
    {
        $q = $this->query('PRAGMA table_info(?)', $table);

return $q ? $q->fetchAll(PDO::FETCH_COLUMN, 1) : [];
    }

/**
     * Build DSN string for PDO constructor
     */
    protected function dsn_string($dsn)
    {
        return $dsn['phptype'] . ':' . $dsn['database'];
    }

/**
     * Returns driver-specific connection options
     *
     * @param array $dsn DSN parameters
     *
     * @return array Connection options
     */
    protected function dsn_options($dsn)
    {
        $result = parent::dsn_options($dsn);

// Change the default timeout (60) to a smaller value
        $result[PDO::ATTR_TIMEOUT] = isset($dsn['timeout']) ? intval($dsn['timeout']) : 10;

return $result;
    }
}

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