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<?php
/**
 * BusinessAdmin: administrative software for small companies
 * Copyright (C) 2015 Camil Staps (ViviSoft)
 *
 * 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/>.
 */

error_reporting(E_ALL);
ini_set('display_errors', 1);

require('../conf.php');

function lower_version($that, $new) {
	$that = explode('.', $that);
	$new = explode('.', $new);
	while (count($that) < count($new)) $that[] = 0;
	while (count($new) < count($that)) $new[] = 0;

	for ($i = 0; $i < count($new); $i++) {
		if ($new[$i] > $that[$i]) {
			return true;
		}
	}
	return false;
}

if (isset($_GET['upgrade'])) {

	if (lower_version($_GET['upgrade'], '0.1')) {
		try {
			$_pdo->query("ALTER TABLE `".Constants::db_prefix."assignment` CHANGE  `hours`  `hours` FLOAT UNSIGNED NOT NULL");
		} catch (PDOException $e) {
			echo "Altering the database structure failed with a PDOException ({$e->getCode()}): {$e->getMessage()}<br/>" . $e->getTraceAsString();
		}
	}

	if (lower_version($_GET['upgrade'], '0.2.2')) {
		try {
			$_pdo->query("ALTER TABLE `".Constants::db_prefix."assignment` DROP FOREIGN KEY `assignment_ibfk_1`");
			$_pdo->query("ALTER TABLE `".Constants::db_prefix."assignment` ADD CONSTRAINT `assignment_ibfk_1` FOREIGN KEY (`offerId`) REFERENCES `".Constants::db_prefix."offer` (`id`) ON DELETE CASCADE ON UPDATE CASCADE");
		} catch (PDOException $e) {
			echo "Altering the database structure failed with a PDOException ({$e->getCode()}): {$e->getMessage()}<br/>" . $e->getTraceAsString();
		}
	}

	if (lower_version($_GET['upgrade'], '0.3')) {
		try {
			$_pdo->query("CREATE TABLE IF NOT EXISTS `".Constants::db_prefix."discount` (
				  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
				  `offerId` smallint(5) unsigned NOT NULL,
				  `title` tinytext NOT NULL,
				  `description` text NOT NULL,
				  `value` float unsigned NOT NULL,
				  `VAT_percentage` float NOT NULL,
					PRIMARY KEY (`id`)
				) ENGINE=InnoDB DEFAULT CHARSET=latin1;");
			$_pdo->query("ALTER TABLE `".Constants::db_prefix."discount`
				  ADD CONSTRAINT `discount_ibfk_1` FOREIGN KEY (`offerId`) REFERENCES `".Constants::db_prefix."offer` (`id`);");
		} catch (PDOException $e) {
			echo "Altering the database structure failed with a PDOException ({$e->getCode()}): {$e->getMessage()}<br/>" . $e->getTraceAsString();
		}
	}

	if (lower_version($_GET['upgrade'], '0.4')) {
		try {
			$_pdo->query("CREATE TABLE IF NOT EXISTS `".Constants::db_prefix."user` (
				  `id` smallint(5) unsigned NOT NULL AUTO_INCREMENT,
					`username` varchar(24) NOT NULL,
					`password` varchar(255) NOT NULL,
					PRIMARY KEY (`id`)
				) ENGINE=InnoDB DEFAULT CHARSET=latin1;");
		} catch (PDOException $e) {
			echo "Altering the database structure failed with a PDOException ({$e->getCode()}): {$e->getMessage()}<br/>" . $e->getTraceAsString();
		}
	}

	if (lower_version($_GET['upgrade'], '0.4.2')) {
		try {
			$_pdo->query("CREATE TABLE IF NOT EXISTS `".Constants::db_prefix."payment` (
					`id` smallint(5) unsigned NOT NULL,
					`offerId` smallint(5) unsigned NOT NULL,
					`date` timestamp NOT NULL DEFAULT CURRENT_TIMESTAMP
				) ENGINE=InnoDB DEFAULT CHARSET=latin1;");

			$offers = $_pdo->query("SELECT `id`,`payment_received` FROM `".Constants::db_prefix."offer` WHERE `payment_received` IS NOT NULL");
			$offers = $offers->fetchAll(PDO::FETCH_ASSOC);
			foreach ($offers as $offer) {
				$received = $offer['payment_received'];
				$offer = new Offer($_pdo, $offer['id']);
				$offer->createPayment($received);
			}

			$_pdo->query("ALTER TABLE `".Constants::db_prefix."offer` DROP `payment_received`;");
		} catch (PDOException $e) {
			echo "Altering the database structure failed with a PDOException ({$e->getCode()}): {$e->getMessage()}<br/>" . $e->getTraceAsString();
		}
	}

	echo "<br/>All done.";
}
?>

<p>You're going to upgrade to version <?=Constants::version?>. What was your old version number?</p>
<form method="GET">
	<input type="text" name="upgrade" placeholder="Old version"/>
	<input type="submit" value="Upgrade"/>
</form>