<?php
/**
 * @version $Header$
 * @package install
 * @subpackage upgrade
 */

// Copyright (c) 2002-2003, Luis Argerich, Garland Foster, Eduardo Polidor, et. al.
// All Rights Reserved. See below for details and a complete list of authors.
// Licensed under the GNU LESSER GENERAL PUBLIC LICENSE. See http://www.gnu.org/copyleft/lesser.html for details.

$gBitSmarty->assign( 'next_step',$step );
$config_file = empty($_SERVER['CONFIG_INC']) ? '../config/kernel/config_inc.php' : $_SERVER['CONFIG_INC'];

// set the maximum execution time to very high
ini_set( "max_execution_time", "86400" );

/**
 * required setup
 */
include_once( $config_file ); // relative, but we know we are in the installer here...
$gBitInstaller->scanPackages( 'admin/upgrade_inc.php' );

// get some nice R1 to R2 specific upgrade info on the screen - should keep users happy...
if( !empty( $_SESSION['upgrade_r1'] ) ) {
	if( $rs = $gBitSystem->mDb->query( "SELECT `name` ,`value` FROM `" . BIT_DB_PREFIX . "tiki_preferences`" ) ) {
		while( $row = $rs->fetchRow() ) {
			$oldPrefs[$row['name']] = $row['value'];
		}
	}
	foreach( array_keys( $gBitSystem->mPackages ) as $package ) {
		if( @$oldPrefs['package_'.$package] == 'y' ) {
			$upgrading[] = $package;
		}
	}
	asort( $upgrading );
	$gBitSmarty->assign( 'upgrading', $upgrading );
}

$upgradePath =  [
	'TikiWiki 1.8' => [
		'TIKIWIKI18' => 'BONNIE',
		'BONNIE' => 'BWR1',
		'BWR1' => 'BWR2',
	],
	'TikiWiki 1.9' => [
		'TIKIWIKI19' => 'TIKIWIKI18',
		'TIKIWIKI18' => 'BONNIE',
		'BONNIE' => 'BWR1',
		'BWR1' => 'BWR2',
	],
	'BWR0' => [
		'BONNIE' => 'BWR1',
		'BWR1' => 'BWR2',
	],
	'BWR1' => [
		'BWR1' => 'BWR2',
	],
];

$gBitSmarty->assign( 'upgradeFrom', $gUpgradeFrom );
$gBitSmarty->assign( 'upgradeTo', $gUpgradeTo );

$upPackages = [];

if( !empty( $_REQUEST['upgrade'] ) ) {
	if( isset( $upgradePath[$_REQUEST['upgrade_from']] ) ) {
		if( !empty( $gDebug ) || !empty( $_REQUEST['debug'] ) ) {
			$gBitInstaller->debug();
		}

		foreach( $upgradePath[$_REQUEST['upgrade_from']] as $from=>$to ) {
			global $gUpgradeFrom, $gUpgradeTo;
			$gUpgradeFrom = $from;
			$gUpgradeTo = $to;

			$gBitInstaller->scanPackages( 'admin/upgrade_inc.php', false );
			$firstPackages = array_flip( [ 'kernel', 'users', 'categories', 'liberty', 'wiki', 'blogs' ] );
			$secondPackages = array_flip( $upgrading );

			// upgrade the ones that are order critical first
			foreach( array_keys( $firstPackages ) as $package ) {
				$gBitInstaller->upgradePackage( $package );
				if( isset( $secondPackages[$package] ) ) {
					unset( $secondPackages[$package] );
				}
				array_push( $upPackages, $package );
			}

			// upgrade remaining packages
			foreach( array_keys( $secondPackages ) as $package ) {
				$gBitInstaller->upgradePackage( $package );
				array_push( $upPackages, $package );
			}
			unset( $gBitInstaller->mUpgrades );
		}
		// If server supports InnoDB for MySql and selected for use
		// we traverse all tables in db after upgrade and change engine if needed
		if( isset( $_SESSION['use_innodb'] ) && $_SESSION['use_innodb'] == true ) {
			$rs = $gBitInstaller->mDb->Execute("SHOW TABLE STATUS");
			while ( !$rs->EOF) {
				$row = $rs->GetRowAssoc(false);
				switch( isset( $row['Engine'] ) ? strtoupper( $row['Engine'] ) : strtoupper( $row['Type'] )) {
					case 'INNODB':
					case 'INNOBASE':
						break;
					default:
						$gBitInstaller->mDb->Execute("ALTER TABLE " . $row['Name'] . " ENGINE = INNODB");
						break;
				}

				$rs->MoveNext();
			}
			$rs->Close();
		}
	}

	$gBitSmarty->assign( 'package_list', $upPackages );

	$app = '_done';
	$gBitSmarty->assign( 'next_step',$step + 1 );
}