<?php
/**
 * webtrees: online genealogy
 * Copyright (C) 2016 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/>.
 */
namespace Fisharebest\Webtrees\Module\FamilyTreeFavorites\Schema;

use Fisharebest\Webtrees\Database;
use Fisharebest\Webtrees\Schema\MigrationInterface;
use PDOException;

/**
 * Upgrade the database schema from version 1 to version 2.
 */
class Migration1 implements MigrationInterface {
	/** {@inheritDoc} */
	public function upgrade() {
		// Add the new columns
		try {
			Database::exec(
				"ALTER TABLE `##favorites`" .
				" CHANGE fv_id    favorite_id   INTEGER AUTO_INCREMENT NOT NULL," .
				" CHANGE fv_gid   xref          VARCHAR(20) NULL," .
				" CHANGE fv_type  favorite_type ENUM('INDI', 'FAM', 'SOUR', 'REPO', 'OBJE', 'NOTE', 'URL') NOT NULL," .
				" CHANGE fv_url   url           VARCHAR(255) NULL," .
				" CHANGE fv_title title         VARCHAR(255) NULL," .
				" CHANGE fv_note  note          VARCHAR(1000) NULL," .
				" ADD user_id   INTEGER     NULL AFTER favorite_id," .
				" ADD gedcom_id INTEGER NOT NULL AFTER user_id," .
				" DROP KEY ix1," .
				" ADD KEY news_ix1 (gedcom_id, user_id)"
			);
		} catch (PDOException $ex) {
			// Already updated?
		}

		// Migrate data from the old columns to the new ones
		try {
			Database::exec(
				"UPDATE `##favorites` f" .
				" LEFT JOIN `##gedcom` g ON (f.fv_file    =g.gedcom_name)" .
				" LEFT JOIN `##user`   u ON (f.fv_username=u.user_name)" .
				" SET f.gedcom_id=g.gedcom_id, f.user_id=u.user_id"
			);
		} catch (PDOException $ex) {
			// Already updated?
		}

		// Delete orphaned rows
		try {
			Database::exec(
				"DELETE FROM `##favorites` WHERE user_id IS NULL AND gedcom_id IS NULL"
			);
		} catch (PDOException $ex) {
			// Already updated?
		}

		// Delete the old column
		try {
			Database::exec(
				"ALTER TABLE `##favorites` DROP fv_username, DROP fv_file"
			);
		} catch (PDOException $ex) {
			// Already updated?
		}

		// Rename the table
		try {
			Database::exec(
				"RENAME TABLE `##favorites` TO `##favorite`"
			);
		} catch (PDOException $ex) {
			// Already updated?
		}
	}
}