<?php
/**
 * The export function to import the phpMyFAQ backups
 *
 * PHP Version 5.4
 *
 * This Source Code Form is subject to the terms of the Mozilla Public License,
 * v. 2.0. If a copy of the MPL was not distributed with this file, You can
 * obtain one at http://mozilla.org/MPL/2.0/.
 *
 * @category  phpMyFAQ 
 * @package   Administration
 * @author    Thorsten Rinne <thorsten@phpmyfaq.de>
 * @copyright 2009-2014 phpMyFAQ Team
 * @license   http://www.mozilla.org/MPL/2.0/ Mozilla Public License Version 2.0
 * @link      http://www.phpmyfaq.de
 * @since     2009-08-18
 */

define('PMF_ROOT_DIR', dirname(__DIR__));

//
// Define the named constant used as a check by any included PHP file
//
define('IS_VALID_PHPMYFAQ', null);

//
// Bootstrapping
//
require PMF_ROOT_DIR . '/inc/Bootstrap.php';

$action = PMF_Filter::filterInput(INPUT_GET, 'action', FILTER_SANITIZE_STRING);

$auth = false;
$user = PMF_User_CurrentUser::getFromSession($faqConfig);

if ($user) {
    $auth = true;
} else {
    $user = null;
    unset($user);
}

header('Content-Type: application/octet-stream');
header('Pragma: no-cache');

if ($user->perm->checkRight($user->getUserId(), 'backup')) {

    $tables       = $tableNames = $faqConfig->getDb()->getTableNames(PMF_Db::getTablePrefix());
    $tablePrefix  = (PMF_Db::getTablePrefix() !== '') ? PMF_Db::getTablePrefix() . '.phpmyfaq' : 'phpmyfaq';
    $tableNames   = '';
    $majorVersion = substr($faqConfig->get('main.currentVersion'), 0, 3);
    $dbHelper     = new PMF_DB_Helper($faqConfig);

    switch ($action) {
        case 'backup_content' :
            foreach ($tables as $table) {
                if ((PMF_Db::getTablePrefix() . 'faqadminlog' == trim($table)) || (PMF_Db::getTablePrefix() . 'faqsessions' == trim($table))) {
                    continue;
                }
                $tableNames .= $table . ' ';
            }
            break;
        case 'backup_logs' :
            foreach ($tables as $table) {
                if ((PMF_Db::getTablePrefix() . 'faqadminlog' == trim($table)) || (PMF_Db::getTablePrefix() . 'faqsessions' == trim($table))) {
                    $tableNames .= $table . ' ';
                }
            }
            break;
    }

    $text[] = "-- pmf" . $majorVersion . ": " . $tableNames;
    $text[] = "-- DO NOT REMOVE THE FIRST LINE!";
    $text[] = "-- pmftableprefix: " . PMF_Db::getTablePrefix();
    $text[] = "-- DO NOT REMOVE THE LINES ABOVE!";
    $text[] = "-- Otherwise this backup will be broken.";

    switch ($action) {
        case 'backup_content' :
            $header = sprintf(
                'Content-Disposition: attachment; filename="%s-data.%s.sql',
                $tablePrefix,
                date("Y-m-d-H-i-s")
            );
            header($header);
            foreach (explode(' ', $tableNames) as $table) {
                print implode("\r\n", $text);
                $text = $dbHelper->buildInsertQueries("SELECT * FROM " . $table, $table);
            }
            break;
        case 'backup_logs' :
            $header = sprintf(
                'Content-Disposition: attachment; filename="%s-logs.%s.sql',
                $tablePrefix,
                date("Y-m-d-H-i-s")
            );
            header($header);
            foreach (explode(' ', $tableNames) as $table) {
                print implode("\r\n", $text);
                $text = $dbHelper->buildInsertQueries("SELECT * FROM " . $table, $table);
            }
            break;
    }

} else {
    print $PMF_LANG['err_NotAuth'];
}