<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2018 webtrees development team
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
 * GNU General Public License for more details.
 * You should have received a copy of the GNU General Public License
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 */
declare(strict_types=1);

namespace Fisharebest\Webtrees\Schema;

use Fisharebest\Webtrees\Database;
use Throwable;

/**
 * Upgrade the database schema from version 22 to version 23.
 */
class Migration22 implements MigrationInterface
{
    /**
     * Upgrade to to the next version.
     *
     * @return void
     */
    public function upgrade(): void
    {
        // - data update for 1.4.0 media changes
        $_cfgs = Database::prepare(
            "SELECT gs1.gedcom_id AS gedcom_id, gs1.setting_value AS media_directory, gs2.setting_value AS use_media_firewall, gs3.setting_value AS media_firewall_thumbs, gs4.setting_value AS media_firewall_rootdir" .
            " FROM `##gedcom_setting` gs1" .
            " LEFT JOIN `##gedcom_setting` gs2 ON (gs1.gedcom_id = gs2.gedcom_id AND gs2.setting_name='USE_MEDIA_FIREWALL')" .
            " LEFT JOIN `##gedcom_setting` gs3 ON (gs1.gedcom_id = gs3.gedcom_id AND gs3.setting_name='MEDIA_FIREWALL_THUMBS')" .
            " LEFT JOIN `##gedcom_setting` gs4 ON (gs1.gedcom_id = gs4.gedcom_id AND gs4.setting_name='MEDIA_FIREWALL_ROOTDIR')" .
            " WHERE gs1.setting_name = 'MEDIA_DIRECTORY'"
        )->fetchAll();

        // The constant WT_DATA_DIR is not defined yet (although it was when this script was originally written).
        $WT_DATA_DIR = realpath('data');

        // Check the config for each tree
        foreach ($_cfgs as $_cfg) {
            if ($_cfg->use_media_firewall) {
                // We’re using the media firewall.
                $_mf_dir = realpath($_cfg->media_firewall_rootdir) . DIRECTORY_SEPARATOR;
                if ($_mf_dir == $WT_DATA_DIR) {
                    // We’re already storing our media in the data folder - nothing to do.
                } else {
                    // We’ve chosen a custom location for our media folder - need to update our media-folder to point to it.
                    // We have, for example,
                    // $_mf_dir = /home/fisharebest/my_pictures/
                    // $WT_DATA_DIR = /home/fisharebest/public_html/webtrees/data/
                    // Therefore we need to calculate ../../../my_pictures/
                    $_media_dir = '';
                    $_tmp_dir   = $WT_DATA_DIR;
                    while (strpos($_mf_dir, $_tmp_dir) !== 0) {
                        $_media_dir .= '../';
                        $_tmp_dir   = preg_replace('~[^/\\\\]+[/\\\\]$~', '', $_tmp_dir);
                        if ($_tmp_dir == '') {
                            // Shouldn't get here - but this script is not allowed to fail...
                            continue 2;
                        }
                    }
                    $_media_dir .= $_cfg->media_directory;
                    Database::prepare(
                        "UPDATE `##gedcom_setting`" .
                        " SET setting_value = :media_dir" .
                        " WHERE gedcom_id = :tree_id AND setting_name='MEDIA_DIRECTORY'"
                    )->execute([
                        'media_dir' => $_media_dir,
                        'tree_id'   => $_cfg->gedcom_id,
                    ]);
                }
            } else {
                // Not using the media firewall - just move the public folder to the new location (if we can).
                if (is_dir(WT_ROOT . $_cfg->media_directory) && !file_exists($WT_DATA_DIR . $_cfg->media_directory)) {
                    try {
                        rename(WT_ROOT . $_cfg->media_directory, $WT_DATA_DIR . $_cfg->media_directory);
                        unlink($WT_DATA_DIR . $_cfg->media_directory . '.htaccess');
                        unlink($WT_DATA_DIR . $_cfg->media_directory . 'index.php');
                        unlink($WT_DATA_DIR . $_cfg->media_directory . 'Mediainfo.txt');
                        unlink($WT_DATA_DIR . $_cfg->media_directory . 'thumbs/Thumbsinfo.txt');
                    } catch (Throwable $ex) {
                        // Cannot move the folder?
                    }
                }
            }
        }

        // Delete old settings
        Database::exec("DELETE FROM `##gedcom_setting` WHERE setting_name IN ('USE_MEDIA_FIREWALL', 'MEDIA_FIREWALL_THUMBS', 'MEDIA_FIREWALL_ROOTDIR')");
    }
}